JPS6342467Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a jack having two plug insertion openings, for example, in which the ground spring that contacts the grounding conductor of the plug inserted through the plug insertion opening is shared. Regarding serial jack.

In general, in so-called double jacks that have two plug insertion holes, it is customary to provide individual ground springs corresponding to each plug insertion hole, which contact the ground side conductor of the plug to maintain electrical connection. It is.

However, such a device requires two earth springs and takes time to assemble the jack, which inevitably increases the number of parts and assembly man-hours.

In addition, many conventional jack grounding springs, not limited to this type of double jack, are of a type that clamps the ground side conductor of the plug from both sides to maintain the connected state. It is necessary to form the contact piece into a U-shape, for example, to ensure clearance for insertion of the plug so as not to interfere with insertion of the plug.

Therefore, the depth of the grounding spring is the sum of the dimensions of the arms that face each other and press the plug conductor, plus the dimensions of the base end that connects both arms together. The jack case itself, into which the spring is inserted, had the disadvantage of inevitably being large.

Note that some of these types of earth springs provide relief along the plug insertion direction, while others provide relief in the direction perpendicular to the plug insertion direction, but in the former case, the depth of the jack case is In the case of the latter, the width of the jack case increases, which is a factor that hinders the miniaturization of the jack.

The present invention was developed in view of these circumstances, and its purpose is to reduce the number of parts by sharing the ground spring in a double jack that has a pair of plug insertion ports adjacent to each other. Another object of the present invention is to provide a multiple jack that reduces the number of assembly steps and that also allows the overall size of the jack to be reduced by improving the shape of the earth spring.

In order to achieve the above object, the present invention is characterized by being constructed as follows.

That is, an earth spring is inserted into the middle of both plug insertion paths that communicate with adjacent plug insertion openings, and each tip of a pair of contact pieces protruding like two limbs of this earth spring is inserted into the plug. By configuring it so that it faces the road, the earth spring can be shared, reducing both the number of parts and assembly man-hours. Furthermore, there is no need to secure escape from the plug as with conventional earth springs, making the overall jack more compact. This is what makes it possible.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a jack body integrally molded from a synthetic resin material, and a cylindrical plug insertion opening 2, 3 consisting of two stages, upper and lower, is provided on the front wall 1a of the jack body 1.
A plug insertion passage 4, which is provided protrudingly and communicates with the plug insertion openings 2 and 3, is provided inside the plug insertion openings 2 and 3.
5 is formed.

Further, an earth spring holding groove 6 is provided in the middle part of both the plug insertion paths 4 and 5, and an earth spring 7 is inserted into this holding groove 6. Contact protrusions 7b' and 7c' formed at the tips of a pair of contact pieces 7b and 7c that protrude in a shape face the plug insertion paths 3 and 4, respectively.

By the way, the earth spring 7 is a plug (not shown) inserted through the plug insertion ports 2 and 3.
It is a contact member that comes into elastic contact with the ground-side conductor portion of the base portion 7a to maintain an electrical contact state, and its terminal portion 7d protrudes from one end portion of the base portion 7a via a curved detour portion 7e.

In addition, locking claws 7f and 7f are provided protruding from the base ends of the contact pieces 7b and 7c, respectively, and the terminal portion 7d
When the earth spring 7 is inserted into the earth spring holding groove 6 with a locking claw 7g protruding from the earth spring 7g, the earth spring 7 is held in place by the elastic force of these locking claws 7f, 7f, and 7g. It is made to be securely locked in the holding groove 6.

The earth spring 7 is an integral body obtained by punching out a plate spring material using a press or the like.

On the other hand, the earth spring holding groove 6 is formed along a line connecting the plug insertion paths 4 and 5, and is formed to communicate with each other and to correspond to the shape of the earth spring 7. Ru.

In the figure, reference numerals 8 and 9 are tip contact pieces that elastically contact and maintain contact with the tip conductor portion of a plug (not shown) inserted through the plug insertion openings 2 and 3, and are formed in the jack body 1. holding grooves 10 and 11
Each is press-fitted inside.

Further, reference numerals 12 and 13 in the figure indicate break contacts that are disconnected from the tip contact pieces 8 and 9 when the plug is inserted, and remain in contact with the tip contact pieces 8 and 9 when the plug is removed. and
Retaining grooves 14 and 1 formed in the jack body 1
5, respectively.

In addition, the lower surface part 1b of the jack body 1 has a fitting leg part 1 necessary for mounting it on a printed circuit board, etc., for example.
6 and 16 are provided in a protruding manner, and the fitting leg portions 16 and 16 are fitted into fitting holes drilled in the printed circuit board side.

Furthermore, earth spring retaining grooves 17 and 18 are specially provided on the side surfaces 1c and 1c of the jack body 1, communicating the plug insertion path 4 or 5 to the outside and perpendicular to the plug insertion path 3 or 4. The structure is such that a conventionally used U-shaped earth spring (not shown) can also be attached.

According to such a configuration, the earth spring 7
can be shared by both jacks, which reduces both the number of parts and assembly man-hours compared to conventional jacks of this type that each have their own ground spring, making it possible to significantly reduce costs. .

In addition, since the earth spring 7 is configured so that one contact piece 7b or 7c comes into elastic contact with the ground side conductor part of the plug, there is a slight risk that the contact pieces 7b and 7c will be pushed back by the plug when the plug is inserted. It is necessary to secure a space S (in Fig. 4), but the position where such a space is provided is a part that is completely unused in conventional double jacks, and it does not have any effect on the overall dimensions of the jack. It doesn't affect either.

Moreover, since it is not a so-called U-shaped earth spring that clamps the earth conductor part from both sides and maintains the contact state as in the past, there is no need to ensure escape when inserting the plug into the earth spring. Since the shape of 7 is small, the overall size of the jack can be reduced.

Furthermore, since the earth spring 7 is inserted into the middle part of both plug insertion paths 4 and 5, as mentioned above, the part where the earth spring 7 is inserted is different from the conventional two-barrel jack. This is a so-called dead space that has not been utilized at all.
By charging the earth spring 7, the space inside the jack body 1 can be used effectively, and there is no need to secure a special space for installing the earth spring 7.

In particular, as in this embodiment, the earth spring 7
By punching plate spring material or the like using a press, the earth spring 7 itself can be manufactured at low cost, and the space occupied by the earth spring 7 is limited to the thickness of the earth spring 7.
This makes it possible to further downsize the jack itself.

In this embodiment, a double jack with two plug insertion ports has been described, but even in the case of a multiple jack with two or more plug insertion ports and an even number of plug insertion ports, it is possible to An earth spring based on the present invention may be inserted between the two.

Even if there is an odd number of jacks, the structure of the present invention may be applied between adjacent jacks, and the remaining jacks may be constructed with conventional earth springs.

In addition, although this embodiment describes a vertical double jack, it can also be applied to a jack with a horizontal plug insertion port.
The protruding direction of the terminal portion of the earth spring 7 may be changed as appropriate.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIGS. 1 and 2 are perspective views, FIG. 3 is an exploded perspective view of the main parts, and FIG. 4 is a side sectional view showing the main parts. 1... Jack body, 2, 3... Plug insertion port, 4, 5... Plug insertion path, 6... Holding groove, 7
...Earth spring, 7a...Base, 7b, 7
c...Contact piece, 7b', 7c'...Contact protrusion.

Claims (1)

[Scope of utility model registration request] It has a pair of plug insertion openings adjacent to each other, an earthing spring is inserted into the middle part of both plug insertion passages communicating with these plug insertion openings, and a pair of contacts protruding in the form of two limbs of this earthing spring. A multiple jack characterized in that each end of each piece faces the plug insertion path.