JPH0120778Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a jack that is easy to manufacture and suitable for miniaturization.

2. Description of the Related Art Various types of jacks are used for connections between units or for inputting and outputting signals in communication equipment, control and measurement equipment, and consumer equipment such as video tape recorders and various audio devices. Conventionally, many such jacks having the structure shown in FIG. 1 have been used. FIG. 1 shows a sectional view of the plug along with an example of a plug to be inserted therein, and in the figure, 1 is the plug and 2 is its jack.

The plug 1 includes contact conductors such as a tip 11, a ring 12, and a sleeve 13 that are arranged on the same central axis, an insulating bushing 14 that electrically isolates these contact conductors from each other, and the tip 11, the ring, and the like. 12, the sleeve 13 is composed of a cutout 15 that covers the outer periphery of each connection terminal, and a cord 16
The core wires are connected to the respective connection terminals by soldering or the like. The jack 2 maintains electrical contact with two break contact springs 21 and 22, one of the break contact springs 21 at all times, and when the plug 1 is inserted, contacts the chip 11 and contacts the break contact spring. The tip contact spring 23, which is disconnected from the other break contact spring 21, is always in electrical contact with the other break contact spring 22 and comes into contact with its ring 12 when the plug 1 is inserted, while the break contact spring 23 The ring contact spring 24 is disconnected from the ring contact spring 22, and the cap 2 is in contact with the sleeve 13 of the inserted plug 1.
5, and a case 26 that houses them all.

In the conventional jack configured in this way,
Fixed contact springs 21, 22, tip contact spring 23, ring contact spring 24, and base 2
5 etc. are inserted into the slits provided in the case 26 one by one to assemble, making the assembly work extremely complicated.Especially in these days when various parts including jacks are becoming smaller, the number of man-hours required for assembly is enormous. This has become a hindrance to cost reductions. In addition, in a jack with such a structure, when soldering to a printed wiring board, etc., there is a risk that flux may enter the jack through the slits due to capillary action and cause contact failure. These measures were essential.

The present invention was developed with this point in mind, and by eliminating the work of inserting each contact spring into the slit of the case from the jack assembly work, it significantly reduces assembly man-hours and completely eliminates the problem of flux rising. The purpose is to provide a jack that is unnecessary and can be easily miniaturized, and its gist is that it consists of a case made of an insulator and a conductive material, and that the case is molded using an insert molding method. a connection plate disposed with its surface exposed inside the case; a connection terminal that penetrates the case without a gap and is led out from the connection plate when the case is molded; and a conductive spring material. a contact spring having a press-contact part housed in the case and press-contacted to the connection plate and a contact part contacting a contact conductor of the plug; and a break terminal fixed to a predetermined position of the case, the contact spring has a free end that interlocks with the contact portion within the case, and when the plug is not inserted, the free end abuts the break terminal so that the contact portion is located within the plug insertion path; The jack is characterized in that when the plug is inserted, the contact part is pressed and displaced by the contact conductor of the plug, and in conjunction with this displacement, the free end is displaced and separated from the break terminal. The present invention will be explained in detail below using the illustrated embodiments.

FIG. 2 is a plan view of an embodiment of the present invention with the top cover removed, and shows the plug 1 inserted. In the figure, 3 is the jack of this embodiment, 31 is a tip contact spring, 32 is a tip dummy spring, 33 is a ring contact spring, and 34 is a sleeve contact spring, all of which are shown in FIG. Various double torsion coil springs are used. Also, 35, 36
are break terminals corresponding to the break contact springs shown at 21 and 22 in FIG. Numeral 37 is a box that forms a case together with a top lid 38 (not shown), and four poles 39 are erected from the bottom of the box.

Four connection plates 40 made of good conductors are arranged on the bottom surface of the box body 37 with their surfaces exposed around the poles 39, respectively, and connection terminals 41 are connected to the box body 37 from each of the connection plates 40.
It is led out from the side wall. These connection plates 40 and connection terminals 41 are arranged by insert molding, for example, as follows. First, a thin plate of good conductor is punched out using press processing, etc.
Connection plate 40 and connection terminal 4 as shown in Fig. 4
Create a continuum of 1. In this case, a through hole 42 is provided in the center of each connection plate 40. next,
The surface of the connection plate 40 is brought into close contact with the surface of the mold corresponding to the bottom of the box, and the box 37 is molded by insert molding. The through holes 42 of the connection plate 40 are provided so as not to block the path for supplying the molding material to the pole portion of the mold during molding. After the box body 37 is molded, it is separated by cutting the connection portion of the connection terminal 41.

The break terminals 35 and 36 are fixedly arranged in the box body 37 molded in this way,
Each pole 39 has a tip contact spring 31, a tip dummy spring 32, a ring contact spring 33,
Insert the sleeve contact spring 34. Each of these contact springs 31 to 34 is compressed in the directions shown by arrows X and X' in FIG. It is pressed into contact with it and becomes electrically conductive. At this time, when the plug is not inserted, the tip contact spring 31 and the ring contact spring 33 are both in the form of a double torsion coil, and their repulsive force causes the free end to rotate in the circumferential direction of the coil. A folded portion 44 is rotationally displaced and biased in the circumferential direction of the coil and comes into contact with the break terminal 35 or 36, so that the contact portion 46 is located within the insertion path of the plug 1, and the tip dummy spring 32 and sleeve Similarly, the contact spring 34 has a structure in which it is pressed into contact with a locking piece 45 provided on the box body 37.

When the plug 1 is inserted into the jack 3 configured in this manner, the folded portions 44 of the tip contact spring 31, ring contact spring 33, and sleeve contact spring 34 are turned counterclockwise, and the folded portions 44 of the tip dummy spring 32 are turned counterclockwise. Rotating clockwise, each contact portion 46 comes into pressure contact with the tip 11, ring 12, sleeve 13, etc. of the plug 1. By this rotation of the folded portion 44, the tip contact spring 31 and the ring contact spring 33 are electrically disconnected from the break terminal 35 or 36. Therefore, the tip contact spring 31 or the ring contact spring 33, which is normally connected to the break terminal 35 or 36, is connected to the tip 11 by the insertion of the plug 1.
Alternatively, the connection is switched to the ring 12.

In this way, the jack of this embodiment can be easily assembled by simply inserting the double torsion coil spring into each pole and covering the top cover, and inserting each contact spring etc. into the slit in the box body one by one. The number of man-hours can be significantly reduced compared to the conventional method, and each contact spring etc. can be connected to the outside by a connecting plate placed by insert molding and a connecting terminal connected to the connecting plate. Since the contact point is derived from the contact point, there is no need to worry about contact failure due to rising flux, and therefore no countermeasures are required. In addition, since a double torsion coil spring is used for each contact spring, the stress applied when the plug is inserted is evenly distributed throughout the spring, so even if the distance between the pole and the contact part is shortened, the spring Not only does this eliminate breakage accidents due to fatigue, allowing for significant downsizing, but it also makes it possible to significantly improve contact reliability because the contact portions are twin contacts.

Although the illustrated embodiments have been described in detail above, it goes without saying that the present invention is not limited thereto. FIG. 5 is a front view and a plan view showing an example of a flat plate spring used as each contact spring in another embodiment of the present invention. In the figure, 47 is a pressure contact part, 48 is a contact part provided near the free end, and this contact spring is connected to the box body 3.
7 and cover with the top cover 38, a force in the direction shown by the arrows X and X' acts on the pressure contact part 47, and the pressure contact part 47 at the lower end is pressed against the connection plate 40, and is electrically connected to it. becomes electrically conductive. In this case, something corresponding to the pole 39 in the embodiment shown in FIG. 2 becomes unnecessary.

Also, regarding the insert molding of the connection plate 40, the same jack can be obtained not only for the box body 37 but also for the top cover 38.

As explained in detail above, the jack of the present invention has contact springs each having a press-contact part arranged on a connection plate placed in a box etc. by insert molding, and this press-contact part is inserted into the case. At the same time, each contact spring is held in pressure contact with the connection plate, and each contact spring is electrically guided to the outside through a connection terminal that penetrates the case without a gap and protrudes to the outside when the case is molded. Because of its structure, the work of inserting the contact springs into the slits in the case can be completely eliminated from the assembly process.Therefore, not only can a significant cost reduction be expected due to the reduction in assembly man-hours, but there is also no countermeasure against flux rise. It is possible to realize a jack that is unnecessary and can be easily miniaturized. Furthermore, the jack according to the present invention is equipped with a break terminal fixed at a predetermined position of the case, and the contact portion and free end of the contact spring are
The switch function can be exerted by connecting and disconnecting the contact conductor and break terminal of the plug, respectively.

[Brief explanation of the drawing]

Figure 1 is a sectional view for explaining a conventional jack, Figure 2 is a plan view of an embodiment of the present invention with the top cover removed, and Figure 3 is an example of a contact spring used in this. front view and left side view,
FIG. 4 is a plan view showing an example of a continuous body of a connecting plate and a connecting terminal, and FIG. 5 is a front view and a plan view showing an example of a contact spring used in another embodiment of the present invention. 1... Plug, 11... Chip (contact conductor),
12... Ring (contact conductor), 13... Sleeve (contact conductor), 2, 3... Jack, 31... Chip contact spring, 32... Chip dummy spring,
33...Ring contact spring, 34...Sleeve contact spring, 35, 36...Break terminal, 37...Box (forming a case), 3
8...Top lid (forms a case), 39...Pole, 40...Connection plate, 41...Connection terminal,
43, 47... Pressure contact portion, 44... Folded portion (free end), 45... Locking piece, 46, 48... Contact portion.

Claims (1)

[Scope of utility model registration request] a case made of an insulator, a connection plate made of a conductive material and disposed with its surface exposed inside the case by insert molding when the case is molded; A connection terminal that penetrates without a gap and is led out from the connection plate, a pressure contact part that is made of a conductive spring material and is housed in the case and is pressed against the connection plate, and a contact part that comes into contact with the contact conductor of the plug. a break terminal fixed at a predetermined position in the case; the contact spring has a free end that interlocks with the contact portion within the case; The free end abuts the break terminal and the contact portion is located within the plug insertion path, and when the plug is inserted, the contact portion is pressed and displaced by the contact conductor of the plug, and is interlocked with this displacement. and said free end is displaced away from said break terminal.