JPS5811026Y2 - setzoku plug - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a connection plug (or jack plug) used to connect a cord by fitting the terminal of an insertion plug whose terminal is a pin.

More specifically, the proximal end of the lug terminal is supported by a threaded tube made of synthetic resin that constitutes a socket, and the threaded tube is shaped like a long sleeve to accommodate the terminal portion of the lug terminal. When used, remove the cap and insert the cord through the hole formed in the outer end of the cap. Connect the cable to the lug terminal, screw the cap back on in that state, place 1 of the type of connecting plani used to connect to the pin-shaped terminal of the insertion plug inserted from the socket, and insert the synthetic resin into it. The support means for the lug terminals molded from L: la and Q are particularly devised by T.

Conventional connection plugs of this type were assembled by insert-molding the lug terminals into the threaded tube molded from synthetic resin when the threaded tube was molded from synthetic resin. Alternatively, the threaded barrel can be formed into a cap-like outer barrel with the threaded part on the inner surface, and then a short threaded barrel with a threaded part on the outer circumferential surface can be screwed into the inner cavity of the threaded barrel on the outer circumferential surface. When a shaft-shaped inner cylinder is formed separately and the inner cylinder is screwed into the cap-shaped outer cylinder inner cavity, the base of the lug terminal is inserted into the axial groove provided on the outer peripheral surface of the inner cylinder. This is done by fitting the ends and tightening and holding the inner cylinder and the outer cylinder by screwing them together.

However, these methods have a problem in that the former insert molding method makes molding the threaded cylinder itself troublesome, and the latter method involves screwing the inner cylinder into the inner cavity of the cap-shaped outer cylinder. In the method of assembling the lug terminal by sandwiching and holding the proximal end thereof between the lug terminals, after the lug terminal is assembled, the cap is screwed into the outer cylinder which is the threaded cylinder. When screwing the cap onto the outer periphery of the other end of the inner cylinder whose one end is screwed onto the outer cylinder, tighten the screws tightly to prevent the cap from loosening, or the cap will get stuck in the inner cylinder. As the inner cylinder is tightened to reduce its diameter, the outer periphery of the inner cylinder tends to separate from the inner peripheral surface of the outer cylinder, causing the lug terminal that was clamped between the inner cylinder and the outer cylinder to float and loosen. The screwing direction of the cap and the inner cylinder is stronger than the screwing of the inner cylinder and the outer cylinder, and the cap rotates together with the inner cylinder. There is a problem in that the lug terminal becomes detached due to increased loosening and the cap falls off.

The purpose of the present invention is to solve these problems by assembling the lug terminal into the screw tube without turning it into an inserter I, and by making the lug terminal assembly extremely strong. To provide a connection plug that does not loosen in support of a lug terminal even if the cap is strongly screwed to prevent loosening and rotation.

Next, the structure of the connection plug according to the present invention, which is related to this object, will be explained in detail with reference to the drawings.As shown in FIG. Each proximal end 1a of .1 is supported in a threaded cylinder 10 that serves as a socket a, and a threaded part 21 on the inner end side of a sleeve-shaped cap 20 is screwed into the threaded part 11 of the threaded cylinder 10. Then, each terminal part 1b of the lug terminal 1゜1... is housed in the inner cavity of the cap 20, and each terminal part 1
The pins of the insertion plug B to be inserted from the socket a are assembled so that a part of the outer surface side of the plug b is pressed against the inner wall surface of the cap 20 to give spring properties to the lug terminals 1, 1, and so on. It is the same as the previous method, but each terminal part 1b of the lug terminal 1 is held and comes into contact with the shaped terminal block.
When molding the threaded cylinder 10 with a synthetic resin material, the screw is attached to the outer end side of the inner peripheral surface (on the left side in Fig. 3) as shown in Figs. 3, 4, and 5. Two annular step portions 12 and 13 having a diameter larger than the inner diameter of the cylinder 10 are formed, and
On the inner end side of the inner circumferential surface (the right end side in FIG. 3), there is an inner step portion 13 having a smaller diameter among the second step portions 12 and 13.
An appropriate number of axial grooves 14 extending from the opening 10a on the inner end side of the threaded cylinder 10 are formed at appropriate intervals in the circumferential direction of the threaded cylinder 10, and The inner bore of the threaded cylinder 10 is tapered so as to have a somewhat smaller diameter toward the inner end.

Further, as shown in FIG. 8, the base end 1a of each lug terminal 1 has a locking piece fitted into the inner step 13 of the two steps 12 and 13 at the base end. Notches 3, 3 are formed on the left and right side edges except for 2, and the above-mentioned axial groove 14 is formed.
It is formed to a width that fits into the.

In addition, a fitting tube 30 is formed separately from the threaded tube 10 and fits into the inner cavity of the screw tube 10 by being press-fitted from the outer end side of the screw tube 10. At the outer end, as shown in FIG. 9, there is a flange 3 that fits into the stepped portion 12 on the outside of the threaded barrel 10 when the threaded barrel 10 is fitted into the threaded barrel 10 described above.
1.

Then, each lug terminal 1, 1.1 has its proximal end 1a dropped into a groove 14 formed in the inner circumferential surface of the threaded cylinder 10, as shown in FIG. Fit the locking piece 2 into the inner step part 13 so that the notches 3, 3 fit into the groove part 14, and in this state, press fit the fitting cylinder 30 from the outer end side as shown in Fig. 9. The lug terminal 1
The lug terminal 1 is attached to the screw tube 10 by sandwiching the base end 1a between the inner circumferential surface of the screw tube 10 and the outer circumferential surface of the fitting tube 30.

Note that 22 is a through hole for introducing into the cap 20 a cord (not shown) connected to the lug terminals 1, 1.1 which will be located in the inner cavity of the cap 20 as shown in FIG. 23, when the cord is inserted into the inner cavity of the cap 20 through the through hole 22, connected to each terminal 1, and then the cap 20 is screwed into the screw cylinder 10, The tip of the lug terminal 1 (the right end in FIG. 2), which is equipped with the lug pieces 4, 4 that hold the cord, is fitted in between the inner cavity of the cap 20 to prevent it from moving. It is a protrusion provided on the outer end side, and 15 is a knob formed at the base end of the threaded cylinder 10.

Further, the aforementioned fitting cylinder 30 is molded from a soft synthetic resin material, and the cap 20 is molded from a hard synthetic resin material.

Next, to explain the function and effect, the connection plug A according to the present invention has a notch 3 in the inner circumferential wall of the screw tube 10 in order to attach and support the lug terminal 1 to the screw tube 10 as described above.
. A step part 13 in the circumferential direction into which the lug terminal 1 is fitted is formed, into which the proximal end part 1a of the lug terminal 1 is dropped, and a fitting cylinder 30 formed of a synthetic resin material separately from the threaded cylinder 10 is provided on the inner surface thereof. The cap 20 is press-fitted from the outer end side of the threaded barrel 10 and is clamped between the inner peripheral wall of the threaded barrel 10 and the outer peripheral wall of the fitting barrel 30. When screwing the cap 20 onto the threaded portion 11 provided on the outer peripheral surface of the threaded cylinder 10, the cap 20 narrows the threaded cylinder 10 to a small diameter from the outer peripheral side toward the axis. As the tightening is continued, the fitting between the threaded cylinder 10 and the fitting cylinder 30 becomes even stronger, so the cap 20
While firmly screwing the lug terminal 1 into the threaded tube 10 to prevent the cap 20 from loosening and rotating during use,
The mounting support for the threaded cylinder 10 can be strengthened.

Furthermore, the lug terminal 1 can be made in a state where it is engaged with the groove portion 14 and the stepped portion 13 by fitting the fitting tube 30 formed of a synthetic resin material into the inner cavity of the screw tube 10 made of a synthetic resin material. The threaded barrel 10 and the fitting barrel 30 will be held between each other, and the fitting barrel 30 is fitted into the inner cavity of the threaded barrel 10 so that the inner circumferential surface of the threaded barrel 10 is positioned at one end in the axial direction. This is because the fitting is performed by forcibly press-fitting the fitting tube 30 into the tapered shape from the outer end side to the inner end side of the other end, and then forcefully press-fitting the fitting tube 30 into it from the outer end side. , threaded tube 10 and fitting tube 30
In the state where they are fitted together, the threaded cylinder 10 and the fitting cylinder 30
Due to the elasticity of the synthetic resin material that forms the The lug terminal 1 is held more firmly than insert molding, which tends to cause peeling between the lug terminal and the synthetic resin material because the synthetic resin material contracts when tying. .

Therefore, compared to previous connection plugs in which lug terminals were simply inserted and supported in one piece, the molding of the threaded tube is much easier and the lug terminals are held more firmly, and the inner surface of the screw tube is The conventional connection plug had an inner cylinder screwed together and a lug terminal held between them, but now the threaded cylinder has been tightened to prevent the cap from loosening and rotating during use. Compared to the previous case where the lug terminal and the inner cylinder screwed into it would separate, making the lug terminal installation unstable, we have made the lug terminal installation stronger while preventing the cap from loosening during use. You will now get a connection plug.

[Brief explanation of the drawing]

Fig. 1 is a side view of the plug according to the present invention, Fig. 2 is a longitudinal sectional side view of the same plug, Fig. 3 is a longitudinal sectional view of the threaded tube of the above plug, Fig. 4 is a front view of the same, and Fig. 5 is a longitudinal sectional view of the plug according to the invention. Same as above, rear view, No. 6
The figure is a longitudinal sectional view of the fitting tube, FIG. 7 is a longitudinal sectional view of the threaded tube in a state where the fitting tube is fitted, and FIGS. 8 and 9 are the steps for assembling the lug terminal to the screw tube. 10 is a side view of the screw tube with the lug terminal assembled, FIG. 11 is a vertical sectional view of the cap, and FIG. 12 is a front view of the cap. Explanation of drawing symbols A... Connection plug, 1...
...Lug terminal, 1a...Base end, 1b...
...Terminal part, a...Socket, 10...
Threaded cylinder, 10 a... Opening, 11...
Threaded part, 12.13...Stepped part, 14...
・Groove section, 15... Knob, 2... Locking piece, 20... Cap, 21... Threaded section, 22... Transparent Hole, 23... Projection, 3
......Cut, 30...Mating tube, 31.
...Flange, 4...Lug piece, B...
...Insertion plug, b...Pin-shaped terminal.

Claims (1)

[Scope of utility model registration request] The threaded tube 10 that supports the lug terminal 1 and screws the cap 20 that covers the lug terminal 1 is made of a synthetic resin material and has an inner peripheral surface that is tapered in diameter from the outer end to the inner end. The lug terminal 1 has an axial groove 14 having a width into which the proximal end portion 1a of the lug terminal 1 is fitted, and cuts 3, 3 are formed on the inner peripheral surface of the lug terminal. A step portion 13 in the circumferential direction into which the locking piece 2 formed at the base end of the base end portion 1a of the terminal 1 is fitted is formed, and a groove portion 14 thereof is formed.
The proximal end portion 1a of the lug terminal 1 is dropped into the stepped portion 13, and a fitting tube 30 molded from a synthetic resin material separately from the screw tube 10 is press-fitted into the inner surface thereof from the outer end side of the screw tube 10. A connection plug characterized in that the lug terminal 1 is supported by a screw tube 10 by fitting together.