JP3062432B2 - Plug-in plug - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug used for connecting a cord, and more particularly to a plug capable of easily pulling out a terminal inserted into an outlet.

2. Description of the Related Art Conventionally, an insertion plug having a plug body from which a pair of terminals protrudes and a cord is drawn out is generally known. This kind of plug is provided with a pair of terminals parallel to a cord drawing direction. Is usually protruding. For this reason, when this plug is connected to, for example, an outlet embedded in a wall surface, the cord is pulled out in a direction perpendicular to the wall surface, and there is a problem that the cord is obstructive.

Therefore, there has been proposed an insertion plug in which a pair of terminals project from the front side of a thin plug body and a cord is drawn out from the peripheral surface side of the plug body.

[0004]

By the way, in the case of a plug having such a structure, for example, when the plug is connected to an outlet embedded in a wall, the cord is drawn out along the wall. This has the advantage that the code does not get in the way.

However, since the thickness of the plug body in the direction perpendicular to the wall surface is inevitably reduced, there is a problem that the operation of pulling out the terminal inserted into the outlet is not easy. This tendency is remarkable especially when a pair of terminals are juxtaposed in the cord lead-out direction.

The plug body of the conventional plug is
A pair of butt-shaped case bodies are integrated using bolts and nuts or formed by molding.However, the former using bolts and nuts is not easy to assemble, and the terminals are loosened due to loose nuts. There is a risk of rattling, and the latter by mode molding has a problem that the holding force of the terminal is not always sufficient.

The present invention has been made in view of such a situation, and even if a plug has a structure in which a pair of terminals protrudes in a direction perpendicular to the cord withdrawing direction, the plug inserted into the outlet can be used. An object of the present invention is to provide an insertion plug that can be easily pulled out and does not have a possibility of applying excessive force to a cord or the like.

Another object of the present invention is to provide an insertion plug which can be easily pulled out even when a pair of terminals are juxtaposed in a cord pulling-out direction.

Another object of the present invention is to provide an insertion plug which is easy to assemble, can stably hold a terminal, and has no troubles such as rattling of the terminal even when used for a long time.

It is still another object of the present invention to provide a plug which does not obstruct the operation lever when plugging into an outlet.

[0011]

According to the present invention, a pair of terminals project from a front side.
In a plug having a thin plug body from which a cord is pulled out from the peripheral surface side, a gate-shaped operation lever capable of swinging around a circumferential position substantially perpendicular to the cord withdrawal direction is provided on the plug body. When the operation lever is swung to the rear side of the plug main body, pull-out portions are provided at both ends of the operation lever to protrude toward the front side of the plug main body and press the outlet. I do. Thus, even if the plug main body has a shape that is difficult to grasp, it is possible to pull out the terminal from the outlet very easily, and there is no possibility that an excessive force is applied to the cord or the like.

The present invention is also characterized in that a pair of terminals are juxtaposed in the cord lead-out direction, and a pull-out portion is projected to the front side of the plug body at a position intermediate between these terminals. This makes it possible to easily pull out even if the pair of terminals are juxtaposed in the cord pull-out direction and the structure is most difficult to pull out.

The present invention also provides a plug body including an inner case having a front surface having a through hole for a pair of terminals, a rear surface for enclosing a connection portion between each terminal and a cord together with the front surface, and It is characterized by comprising an outer case composed of a front cover having a through hole for a terminal and a rear cover enclosing the front inner case together with the front cover, and the outer case is integrated by ultrasonic welding. By supporting the terminal in both the inner and outer cases, it is possible to stabilize the holding of the terminal, and by using two types of inner and outer cases, for example, the inner case is made of a material having excellent electrical insulation properties. Then, the outer case can be selected to be formed using a material that is easily welded by ultrasonic waves. For this reason, it is possible to obtain a reliable plug. Further, since the outer case is integrated by ultrasonic welding, the work is easy, and there is no problem that the terminals are loose even after long use.

The present invention is further characterized in that the plug body is provided with a stopper for regulating the swing range of the operation lever. As a result, the operation lever swings toward the front side of the plug body, which hinders insertion of the terminal into the outlet, or the operation lever swings up to the cord withdrawal side on the rear surface of the plug body. hand,
There is no problem that the draw-out part gets in the way when plugging the terminal into the outlet.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a plug according to an embodiment of the present invention. The plug 1 includes a plug body 2 having a thin and substantially elliptical shape. A pair of terminals 3a and 3b protrude from the front side, and the cord 4 is drawn out from the peripheral side. That is, both terminals 3a, 3b protrude in a direction perpendicular to the direction in which the cord 4 is drawn out, and both terminals 3a, 3b are arranged side by side in the direction in which the cord 4 is drawn out, as shown in FIG. I have.

As shown in FIGS. 1 and 2, the plug body 2 is provided with an operating lever 5 which can swing about a circumferential surface position substantially orthogonal to the pulling-out direction of the cord 4, and which is supported by the operating lever 5. At both ends of the operation lever 5, there are provided withdrawing portions 6 which project to the front side of the plug body 2 when the operation lever 5 is swung to the rear surface side of the plug body 2. The protrusions of the two pull-out portions 6 toward the front surface of the plug main body 2 allow the two terminals 3a and 3b inserted into the outlet (not shown) to be easily pulled out. This will be described later in detail.

As shown in FIGS. 1 to 4, the operation lever 5 has an inverted U-shaped gate shape following the outer shape of the plug body 2. Pull-out portions 6 whose peripheral edges form a curved surface are integrally provided, and fulcrum pins 7 serving as swing fulcrums of the operation lever 5 are provided on inner surfaces of both ends of the operation lever 5. The thickness W ₁ of the distal end portion of the operating lever 5, as shown in FIG. 4, with respect to the thickness W ₂ of the plug body 2 4-6
The value is set to a value that is about a percentage, and is considered so that the tip end of the operation lever 5 can be easily gripped when the operation lever 5 swings toward the rear surface side of the plug body 2.

On the other hand, as shown in FIGS. 5 and 6, the plug body 2 includes an inner case 8 formed by abutting a front surface portion 8a and a rear surface portion 8b in a pair, and a front cover 9a. An outer case 9 is formed by abutting the rear cover 9b in a two-sheet shape, and the inner case 9 is made of a material having excellent electrical insulation properties, for example, obtained by adding glass fiber to nylon at about 30% by weight. As well as being molded,
The outer case 9 is formed of, for example, a polycarbonate resin which is easily welded by ultrasonic waves. Then, the outer case 9 holds the inner case 8 and both covers 9
a and 9b are integrated by ultrasonic welding.

As shown in FIGS. 5 to 7 (a) and 7 (b), each of the surface portions 8a and 8b of the inner case 8 has a quadrangular plate shape with four corners, and the inner surface of the front portion 8a. 5 and 7 (a), through holes 10a and 10b through which the terminals 3a and 3b pass, holding grooves 11a and 11b for positioning and holding the cord 4, and each fulcrum pin 7 of the operation lever 5 Are provided with bearing recesses 12a, 12b for rotatably holding the outer case 9, positioning holes 13 for positioning with the outer case 9, and positioning pins 14, and the outer surface of the front surface 8a is continuous with the through holes 10a, 10b. And each terminal 3
support cylinders 15a and 15b for stably supporting a and 3b
Is provided.

As shown in FIGS. 5 and 7B, holding grooves 16a and 16b for positioning and holding the cord 4 and fulcrum pins 7 of the operating lever 5 are rotatable on the inner surface of the rear surface portion 8b. Are provided with bearing recesses 17a and 17b, positioning holes 18 for positioning with the outer case 9, and positioning recesses 19 into which the positioning pins 14 are inserted. Then, in a state where the terminals 3a, 3b are passed through the through holes 10a, 10b, the rear surface 8b is superimposed on the front surface 8a, so that the terminals 3a, 3b
In addition, the cord 4 is stably held between the both sides 8a and 8b.

On the other hand, each cover 9a, 9 of the outer case 9
As shown in FIGS. 5 and 6 and FIGS. 8 (a) and (b), b has a shallow bottom container shape capable of enclosing the inner case 8, and the inner surface of the front cover 9a has And FIG. 8 (a)
As shown in FIG. 5, the fitting portion 20 into which the front surface portion 8a of the inner case 8 is fitted, the support holes 21a and 21b into which the support cylinders 15a and 15b are inserted, and the fulcrum pins 7 of the operation lever 5 are rotatable. Bearing recesses 22a and 22b to be held, a positioning cylinder 23 inserted into the positioning hole 13 of the front face 8a, positioning recesses 24a and 24b, and a fitting step 25 are provided.

As shown in FIGS. 5 and 8B, a fitting portion 26 into which a rear surface portion 8b of the inner case 8 is fitted, and each fulcrum pin of the operation lever 5 are provided on the inner surface of the rear cover 9b. , The positioning cylinder 28 inserted into the positioning hole 18 of the rear surface portion 8b, the positioning pins 29a, 29b inserted into the positioning recesses 24a, 24b, and the fitting step. A fitting step portion 30 to be fitted to the portion 25 is provided. The outer case 9 is configured such that the inner case 8 can be clamped and fixed between the two covers 9a and 9b by abutting the two covers 9a and 9b with the inner case 8 inside. The two covers 9a, 9b are integrally ultrasonic-welded by applying ultrasonic vibration to the positions of the fitting steps 25, 30 and the positions of the positioning cylinders 23, 28.

FIGS. 1 and 2 show the rear cover 9b.
As shown in FIG. 8B, stoppers 31 are provided on both sides of the outer peripheral surface, and the swing range of the operation lever 5 is indicated by a chain line from the position indicated by the solid line in FIG. The position is restricted to a range of approximately 90 degrees. As a result, the operation lever 5 swings further counterclockwise than the position shown by the solid line in FIG. 1, or swings further clockwise than the position shown by the chain line in FIG. This prevents troubles such as disturbing the operation of.

Next, the operation of the present embodiment will be described. When the operation lever 5 is set in a state shown by a solid line in FIG.
a, 3b are inserted into the outlet and connected to the blade support,
The plug body 2 comes into contact with the outlet.

On the other hand, when pulling out the insertion plug 1 inserted into the outlet, first, the operation lever 5 in the state shown by the solid line in FIG. 1 is swung, and the state shown by the chain line in FIG. Wake up. In this case, the thickness W ₁ of the distal end portion of the operating lever 5, as shown in FIG. 4, the thickness W ₂ of the plug body 2
Since the value is set to about 40 to 60%, it is possible to easily raise the operation lever 5 by inserting a finger between the tip of the operation lever 5 and an outlet (not shown).

When the operation lever 5 is raised from the position shown by the solid line in FIG. 1, the withdrawn portions 6 at both ends thereof gradually project toward the front side of the plug body 2. For this reason,
The plug body 2 is separated from the outlet by the reaction force, and both terminals 3a and 3b are pulled out from the outlet.

By this operation, both terminals 3a, 3b
Is not completely pulled out of the outlet, but thereafter, by pulling the operation lever 5 or by gripping and pulling the plug body 2, both terminals 3a, 3a
3b can be completely pulled out from the outlet.

However, even when the thickness of the plug body 2 is small, the insertion plug 1 can be easily pulled out from the outlet by using the operation lever 5. Further, the position where the pull-out portion 6 projects to the front side of the plug body 2 is located at an intermediate position between the two terminals 3a and 3b, so that only one of the terminals 3a or 3b is pulled out and the plug body 2 is inclined. There is no defect such as becoming.

Since the swing range of the operation lever 5 is regulated by the stopper 31, the insertion plug 1
There is no such a problem that the operation lever 5 is in the way when plugging into the outlet.

When the terminals 3a and 3b are juxtaposed in the direction in which the cord 4 is pulled out from the plug body 2, it is easier to pull out from the outlet than when judging in the direction of both stoppers 31. However, by using the operation lever 5, it is possible to pull out from the outlet without any trouble.

That is, the terminals 3a and 3b are
If they are arranged in one direction and there is no operation lever 5,
The terminal 3a, 3b is pulled out from the outlet little by little while swinging the plug body 2 toward the cord 4 pull-out side and the operation lever 5 tip side. In this case, if the cord 4 is pulled, the plug body 2 is pulled. 2 can be separated from the outlet to some extent.

On the other hand, when the terminals 3a and 3b are juxtaposed in the pull-out direction of the cord 4 and there is no operation lever 5 as in the present embodiment, the plug body 2 is directly gripped and There is no method other than pulling the terminals 3a and 3b from the outlet little by little while swinging the two toward the stoppers 31. Therefore, the practical effect of providing the operation lever 5 in the plug 1 having such a structure is particularly large.

In the above embodiment, for example, as shown in FIG. 7 (a), the case where the lateral widths of the terminals 3a and 3b are different has been described. However, when the terminals 3a and 3b have the same dimensions, Can be applied in exactly the same way, and similar effects can be expected.

In the above embodiment, the terminal 3
Although the case where a and 3b are juxtaposed in the pulling-out direction of the cord 4 from the plug body 2 has been described,
The same can be applied to the case of juxtaposition in one direction.

The stopper 31 does not necessarily need to be provided on the rear cover 9b of the outer case 9. If a similar function can be obtained, the stopper 31 may be provided on the front cover 9a of the outer case 9 or may be provided inside the plug body 2. It can also be provided.

[0036]

As described above, according to the present invention, the plug body is provided with a gate-shaped operating lever which can swing about a circumferential surface position substantially orthogonal to the cord withdrawing direction as a fulcrum, and at both ends of the operating lever. When the operation lever is swung to the rear side of the plug body, a pull-out part is provided to protrude to the front side of the plug body and press the outlet, so that the plug body is thin and difficult to grip. Even in this case, the terminal can be pulled out from the outlet very easily, and there is no possibility that an excessive force is applied to the cord or the like.

According to the present invention, a pair of terminals are juxtaposed in the cord withdrawing direction, and each withdrawn portion is projected to the front side of the plug body at an intermediate position between the two terminals. The plug body can be pulled out from the outlet, and there is no problem that the plug body is inclined and pulled out.

According to the present invention, the plug body includes an inner case having a front portion and a rear portion, and an outer case having a front cover and a rear cover, and the outer case is integrated by ultrasonic welding. As a result, the terminal can be stably held by supporting the terminal in both the inner and outer cases, and since the outer case is integrated by ultrasonic welding, the terminal can be stably held. At the same time, work is easy. In addition, since two types of inner and outer cases are used, for example, the inner case is formed using a material having excellent electrical insulation, and the outer case is formed using a material that is easily welded by ultrasonic waves. Can be obtained to obtain a plug most suitable for the purpose of use.

Further, according to the present invention, since the stopper for regulating the swing range of the operation lever is provided on the plug body, there is no problem that the provision of the operation lever impedes normal handling.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an insertion plug according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged view showing details of an operation lever and a pull-out portion.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a sectional view showing an exploded state of the insertion plug of FIG. 1;

FIG. 6 is a sectional view showing an assembled state similar to FIG. 5;

7A is a configuration diagram illustrating an inner surface structure of a front portion of the inner case, and FIG. 7B is a configuration diagram illustrating an inner surface structure of a rear portion of the inner case.

FIG. 8A is a configuration diagram illustrating an inner surface structure of a front cover of an outer case, and FIG. 8B is a configuration diagram illustrating an inner surface structure of a rear cover of the outer case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insertion plug 2 Plug main body 3a, 3b Terminal 4 Cord 5 Operating lever 6 Pull-out part 7 Support pin 8 Inner case 8a Front part 8b Rear part 9 Outer case 9a Front cover 9b Rear cover 10a, 10b Through holes 11a, 11b, 16a , 16b Holding groove 13, 18 Positioning hole 15a, 15b Supporting cylinder 21a, 21b Supporting hole 23, 28 Positioning cylinder 31 Stopper

Continuation of the front page (56) References JP-A-51-18886 (JP, A) JP-A-7-29629 (JP, A) JP-A-4-229964 (JP, A) JP-A-57-196485 (JP) , A) Japanese Utility Model 3 106679 (JP, U) Japanese Utility Model 62-62776 (JP, U) Japanese Utility Model 57-157086 (JP, U) Japanese Utility Model 59-91682 (JP, U) Japanese Utility Model 7-43786 (JP, U) Japanese Utility Model 1984-36180 (JP, U) Japanese Utility Model 1-70282 (JP, U) Japanese Utility Model 62-142177 (JP, U) Japanese Utility Model 2-137771 (JP, U) U) Shokai Sho 55-75082 (JP, U) Shokai Hei 2-143788 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01R 13/62-13/633

Claims (4)

(57) [Claims] 1. A plug having a thin plug body with a pair of terminals protruding from a front side and having a cord pulled out from a peripheral surface side, wherein the plug is substantially orthogonal to the cord drawing direction with respect to the plug body. Rutotomoni provided swingable gate-shaped operating lever circumference position as a fulcrum, the opposite ends of the operating lever, the operating lever to the front side of the plug body when is swung to the rear side of the plug body The plug body is provided with a pull-out portion that protrudes and presses the outlet, respectively.
Is a front part having a through hole for a pair of terminals and this front part
Both have a rear surface that holds the connection between each terminal and the cord.
And an outer casing that holds the inner case.
The attachment plug, characterized in that it comprises over the nest. 2. The plug according to claim 1, wherein the pair of terminals are juxtaposed in the cord withdrawing direction, and each of the withdrawn portions projects toward the front side of the plug body at a position intermediate between the two terminals. Plug. 3. The outer case has a through hole for a pair of terminals.
Cover and the inner case with this front cover.
3. A plug according to claim 1, further comprising a rear cover for holding said outer case , said outer case being integrated by ultrasonic welding. 4. The insertion plug according to claim 1, wherein the plug body has a stopper for regulating a swing range of the operation lever.