JPH0357013Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a telephone jack unit into which a modular telephone plug is inserted and connected, and the shape of the contact spring used in the jack unit has been improved. be.

(Prior Art) Recently, a small and high-performance telephone plug has been developed as a telephone plug, which consists of a jack unit 1 and a modular plug 2 as shown in Fig. 9. This type of plug came into use. Figure 12 a, b
1 is a diagram showing a conventional example of a jack unit 1 into which a modular plug 2 is inserted and connected. As shown in the figure, the jack unit has a substantially rectangular plug insertion opening 11 on the front side. A plurality of insulating partition walls 15 are provided at predetermined intervals on one side of the plug insertion opening 11, and an engaging stepped portion 14 for joining the modular plug 2, etc. is provided on the other side opposite to this. ing. A plurality of contact springs 5 are disposed between the insulating partitions 15, and each contact spring 5 is fixed to the jack housing 10 by providing a depression 15' in the insulating partition 15. One end of the contact spring 5 extends inside the plug insertion opening 11 from between the insulating partitions 15, and the other end is connected to a lead wire 19 inside the jack housing 10.

(Problems to be solved by the invention) In the jack unit 1 shown in FIGS. 12a and 12b, the other end of the contact spring 5 is connected to the lead wire 1.
9, a split groove is provided at the other end, and the core wire of the lead wire 19 is press-fitted between the split grooves. For this reason, the other end of the contact spring 5 having the split groove necessarily has a wider width than the one end of the contact spring 5 extending from between the insulating partition walls 15 to the inside of the plug insertion opening 11. It was difficult to arrange the former in a line with the same pitch as the latter. Therefore, in the prior art shown in FIGS. 12a and 12b, the lead wires 19 are positioned vertically every other lead wire, and the contact springs 5 having split grooves are
The other end portions are alternately moved back and forth at every other end. For this reason, in the prior art, two types of contact springs are prepared, namely, a first contact spring ₅₁ shown by a solid line in FIG. 12b, and a second contact spring ₅₂ shown partially by a broken line. Since these parts need to be manufactured in separate processes, there is a problem in that the manufacturing cost of the parts is high.

(Means for solving the problem) In order to solve the above problem, in the present invention, as shown in FIG. The lead wire crimping pieces 51 are arranged in a line and have a split groove 58 at the tip end perpendicular to the alignment direction, and a lead wire crimping piece 51 is arranged from the end opposite to the split groove 58 of the lead wire crimping piece 51. a pitch matching part 52 that extends in a plane substantially perpendicular to the plane of 51 and converges to obtain the same pitch as the spacing pitch of the insulating partition walls 15;
Connected to the convergence side end of the pitch alignment part 52, connected to the L-shaped part 53 which is bent so as to be folded back parallel to the lead wire crimping piece 51, connected to the folded side end of the L-shaped part 53, and connected to the plug insertion opening. The contact spring 5 has an elastic contact piece 54 extending inward of the contact spring 11, and the contact spring 5 is entirely formed of a conductive plate having appropriate elasticity.

(Function) Since the present invention uses the contact spring 5 having the shape described above, the lead wire crimping piece 51 and
As shown in FIG. 1, parts corresponding to the pitch matching part 52, L-shaped part 53, and elastic contact piece 54 are punched out from a single conductive plate, and the parts corresponding to _P1 to _P3 in the figure are punched out. By bending the parts, a plurality of required contact springs 5 can be manufactured at once in a single process, and the first and second contact springs 5 ₁ , 5 ₂ can be manufactured at once by bending the parts respectively. Compared to the conventional technology which required manufacturing in separate steps, manufacturing is easier and the manufacturing cost of the jack unit 1 can be reduced.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
FIGS. 1A to 1C are a front view, a top view, and a left side view, respectively, showing a semi-finished state of a contact spring 5 used in a jack unit 1 according to an embodiment of the present invention. As shown in the above figures, the plurality of contact springs 5 in this embodiment are formed by punching out one conductive plate, and the contact springs 5 are formed on this conductive plate.
Materials with elasticity suitable for this purpose are used. The punching described above is performed continuously on one hoop-shaped conductive plate, and therefore, in the semi-finished state shown in FIG. 1, a support piece 57 having a hoop feed hole 59 is attached. , each contact spring 5 is connected to this support piece 57 via a bridge 56. Support piece 57 and bridge part 5
Needless to say, number 6 will eventually be removed. In addition, in the semi-finished state shown in FIG. 1, the elastic contact piece 54 is only gently cut and raised as shown by the solid line in the figure, but when actually used, it is cut and raised as shown by the chain line in the figure. It is used after being further folded as shown.

FIG. 2 is a perspective view of the jack unit 1 according to this embodiment, and FIGS. 3 a to 3 g are front sectional views, right side views, rear views, left side views, and FIGS. They are a top view, a bottom view, and a vertical sectional view of main parts. As shown in each of the figures, the jack unit 1 has a generally rectangular plug insertion opening 11 into which the plug body 20 of the modular plug 2 is inserted. At the center of one side of the plug insertion opening 11, first and second recessed step portions 12 and 13 are provided, the width of which is gradually narrowed. An engagement step 14 is provided in the deep part of the first recess step 12, and the engagement step 14 of the modular plug 2
5 (see FIG. 8).
Further, a plurality of insulating partition walls 15 are provided on the opposite side of the recessed step portions 12 and 13, and a contact spring 5 is disposed between the insulating partition walls 15. Insulating partition wall 15
The surface of the contact spring 5 is provided with depressions at the locations indicated by broken lines in FIG. 2, and the contact spring 5 is fixed by this. One end of the contact spring 5 is an insulating partition wall 15
It extends toward the inside of the plug insertion port 11 from between the holes. The other end of the contact spring 5 is provided with a split groove at the tip and a lead wire crimping piece 51, and the lead wire crimping piece 51 is inserted into the press-fitting groove 16 of the jack housing 10 (Fig. (see), so that the core wire of the lead wire 19, which has been placed in advance at the back of the press-fitting groove 16, is press-fitted between the split grooves 58, and the connection between the lead wire 19 and the contact spring 5 is established. It is a familiar thing. The jack housing 10 has a plurality of lead wire insertion holes 17.
are provided to correspond to the press-fit grooves 16. The spacing between the press-fitting groove 16 and the lead wire insertion hole 17 is wider than the spacing between the insulating partition walls 15 so that adjacent lead wire crimping pieces 51 do not interfere with each other. Note that Figure 3a is the same as Figure 3f.
It shows a cross section along the a-a′ line at
FIG. 3g shows a cross section taken along line g-g' in FIG. 3a.

FIGS. 4a and 4b show front views of a telephone jack to which the jack unit of the present invention is attached, with the shutter 7 in the closed and open states, respectively. A knob 8 is provided on the shutter 7 to facilitate opening and closing operations. When inserting and connecting the modular plug 2 into a telephone jack, hold this knob 8 and open the shutter 7 upward as shown in FIG. 4b while inserting and connecting the modular plug 2 into the opening 6 of the decorative plate 3. . While the modular plug 2 is connected to the telephone jack, the shutter 7 is held open upward by the modular plug 2 as a support. When the modular plug 2 is removed, the shutter 7 is no longer supported by the modular plug 2, so the shutter 7 moves downward under its own weight and automatically closes the opening 6 of the decorative plate 3, as shown in FIG. 4a.

FIGS. 5a to 5e show a front view, a vertical sectional view, a back view, a horizontal sectional view, and an enlarged sectional view of essential parts, respectively, of the decorative plate 3 used in this embodiment.
In this embodiment, the decorative plate 3 has a substantially rectangular shape, and an opening 6 having substantially the same shape as the plug insertion opening 11 of the jack unit 1 is provided in the center thereof. On the back side of the decorative plate 3, a pair of mutually parallel guide rails 30 are provided on both sides of the opening 6 so as to extend slightly above the opening 6.
are provided, and by loosely fitting both side edges of the shutter 7 into the guide rails 30, the shutter 7 can freely slide in the vertical direction. The decorative plate 3 has a shallow recessed step 31 in the range in which the shutter 7 slides up and down, and this recessed step 31 restricts the range in which the shutter 7 moves up and down. Further, by providing this recessed step portion 31, the cross section approximately L
The height of the letter-shaped guide rail 30 can be reduced accordingly. In addition, Fig. 5b,
d and e are the b-b' line and d- line in Fig. 5c, respectively.
Sections taken along lines d' and ee-e' are shown.

Figures 6a to 6f show a front view, a partially broken bottom view, a rear view, a vertical sectional view, an enlarged front view of main parts, and an enlarged sectional view of main parts, respectively, of the base plate 4 located on the back side of the decorative plate 3. It shows. The base plate 4 is installed in the opening of a wiring box (not shown) embedded in a wall surface, etc. Therefore, the base plate 4 has long holes 41 and 42 that are used when installing the wiring box. are provided at the top and bottom. The upper long hole 41 is formed long in the horizontal direction to prevent the base plate 4 from tilting. Further, the lower elongated hole 42 is formed to be long in the vertical direction so that the wiring box can be mounted even if the distance between the upper and lower mounting holes varies. 4 is fixed straightly and reliably to the wall surface. A jack receiver 60 is provided in the center of the base plate 4 for fitting and fixing the jack unit 1 therein. The jack receiver 60 has a pair of holding arms 61 that hold the jack unit 1 from both sides.
is provided. This holding arm 61 is provided with an engaging piece 62 used for engaging the jack unit 1 and a guide recess 63 for regulating the insertion direction of the jack unit 1 (Fig. 6e).
reference).

When fitting the jack unit 1 into the jack receiver 60, the first rib 18 of the L-shaped ribs 18 provided on both sides of the jack unit 1 is
a is fitted into the guide recess 63, and the jack unit 1 is inserted into the jack receiver 60 along the guide recess 63. When the jack unit 1 is inserted to a certain depth, the second rib 18b of the L-shaped rib 18 comes into contact with the engagement piece 62, but a force is applied to push the jack unit 1 even more firmly into the jack receiver 60. As a result, the second rib 18b of the L-shaped rib 18 climbs over the engagement piece 62 and enters the back side of the engagement piece 62, thereby preventing the jack unit 1 from coming off from the jack receiver 60. It is something that is engaged. Jack receiver 6 provided with engagement piece 62
The holding arms 61 of No. 0 have appropriate elasticity, so that when the jack unit 1 is inserted, both holding arms 61 are slightly pushed apart to both sides. The front side of the engaging piece 62 is a sloped surface, so that when the jack unit 1 is installed, the L-shaped rib 18 of the jack unit 1 can be easily attached to the engaging piece 6.
I'm starting to be able to overcome 2. Similarly, L
The second rib 18b of the letter-shaped rib 18 has an upright surface on the plug insertion port 11 side and an inclined surface on the opposite side, and facilitates engagement of the jack unit 1 with the jack receiver 60, and once engaged. The rear part is designed to prevent jack unit 1 from falling out. Note that the jack unit 1 of this embodiment is as follows:
Not only the direction shown in arrow A ₁ in Figure 3c, but also the arrow
It can also be inserted in the direction shown in A ₂ .
In the latter case, the first rib 18a acts as an engagement rib, and the second rib 18b acts as a guide rib.

A terminal block 70 is provided on both sides of the jack receiver 60, and a terminal chip 71 attached to the end of the lead wire 19 drawn out from the jack unit 1 is fixed to this terminal block 70. The terminal block 70 is provided with a screw hole 77 into which a terminal screw (not shown) for screwing each terminal chip 71 is screwed, and an insulating partition wall 72 for separating each terminal chip 71 from each other. There is. Also,
A locking hole 74 is provided below the terminal block 70 so that the terminal chip 71 does not rotate together with the terminal screw on the terminal block 70 when the terminal screw is tightened. A locking pawl 75 vertically protruding from the tip of the terminal chip 71 is fitted into the terminal chip 71. Terminal chip 7 on terminal block 70
The telephone line connected to 1 is drawn out from inside the wiring box to the front side of the base plate 4 through the cord insertion hole 44 of the base plate 4. A rear cover 43 is provided on the back side of the base plate 4 to cover the jack unit 1.This rear cover 43 blocks moisture from the wall surface and is designed to prevent any adverse effects on the jack unit 1. There is. The above-described decorative plate 3 is fitted and fixed on the front side of the base plate 4 to improve its appearance. Note that FIGS. 6b and d show cross sections taken along lines b-b' and d-d' in FIG. 6a, respectively, and FIGS. This is an enlarged view of regions e and f.

7a to 7c are front views of the shutter 7, respectively;
They are a right side view and a bottom view. As shown in each of the figures, a knob 8 for opening and closing the shutter 7 is integrally protruded from the center of the lower end of the front side of the shutter 7. Further, on the front side of the shutter 7, an arrow 9 is provided to indicate the opening direction of the shutter 7. The decorative plate 3, base plate 4, shutter 7, jack housing 10, etc. are made of synthetic resin molded products.

FIG. 8 is a perspective view showing the appearance of the modular telephone plug 2. FIG. The modular plug 2 has a rectangular plug body 20 that is inserted into the plug insertion opening 11 of the jack unit 1, and a convex stepped portion 23 that protrudes from the plug body 20. A joining piece 24 extends rearward. A release lever 26 is attached to the free end of the elastic engagement piece 24. This release lever 26 is
This is operated when removing the modular plug 2 from the jack unit 1. The first recessed step 12 in the jack unit 1 described above corresponds to the convex step 23 in the modular plug 2, and the second recessed step 13 corresponds to the release lever 26. A plurality of insulating partition walls 21 are provided on the opposite side of the convex step portion 23, and a contact terminal 22 made of a conductive plate is arranged between the insulating partition walls 21. Each contact terminal 22 is connected to a core wire 28 of a telephone cord 27 integrally fixed to the plug body 20 of the modular plug 2.

When connecting the modular plug 2 to the jack unit 1, it is only necessary to insert the modular plug 2 in the direction in which the convex step part 23 and the concave step part 12 match, and when the insertion is complete, the elastic engagement piece 2 The engaging portion 25 of the jack unit 1 is fitted into the engaging step portion 14 of the jack unit 1, and the engaging portion 25 and the engaging step portion 14 are connected to each other.
are engaged with each other, and even if a slight tension is applied to the telephone cord 27, the modular plug 2 will not come out. FIG. 9 shows a state in which the jack unit 1 and the modular plug 2 are connected. As shown in the figure, when the jack unit 1 and the modular plug 2 are connected, the contact terminal 22 of the modular plug 2 comes into contact with the contact spring 5 of the jack unit 1 with appropriate contact pressure. Each core wire 28 of the cord 27 is connected to each lead wire 19 of the jack unit 1, respectively. When removing the modular plug 2 from the jack unit 1, the elastic engagement piece 24 is elastically deformed toward the plug body 20 by pinching the release lever 26 and the telephone cord 27 between fingers. As a result, the engagement between the engagement portion 25 of the elastic engagement piece 24 and the engagement step portion 14 of the jack unit 1 is released, and the modular plug 2 can be removed from the jack unit 1.

10a to 10c are a front view, a top view, and a left side view, respectively, showing the state of a semi-finished product of a contact spring 5 used in a jack unit according to another embodiment of the present invention. In this embodiment, the number of contact springs 5 is reduced to two, and accordingly, the number of lead wires 19 of jack unit 1 and the number of terminal chips 71 are reduced to two; Since the configuration is the same as that of the first embodiment, the details thereof will be omitted. 11a to 11c are front views showing semi-finished states of contact springs 5 used in jack units according to still other embodiments of the present invention, respectively;
They are a top view and a left side view. In this embodiment as well, the only difference is that the number of contact springs 5 is six, and accordingly, the number of lead wires 19 of the jack unit 1 and the number of terminal chips 71 are different.
The second embodiment is the same as the first embodiment except that the number of objects is increased to six, so the details thereof will be omitted.

(Effects of the invention) Since the present invention uses a contact spring having the shape described above, it is possible to punch out and bend a conductive plate having appropriate elasticity as shown in Fig. 1. , a plurality of required contact springs can be manufactured at once in a single process, compared to the conventional technology in which the first and second contact springs had to be manufactured in separate processes. This makes manufacturing easier and reduces the manufacturing cost of the jack unit.

[Brief explanation of the drawing]

1A to 1C are a front view, a plan view, and a left side view showing semi-finished states of a contact spring used in a jack unit according to an embodiment of the present invention, and FIG. 2 is a jack unit used in the above embodiment. Figures 3a to 3g are a front sectional view, a right side view, a rear view, a left side view, a top view, a bottom view, a longitudinal sectional view of main parts, and a vertical sectional view of the jack housing used in the same jack unit. Figures 4a and 4b are front views of a built-in telephone jack to which the above jack unit can be attached, and Figures 5a to 5e are front views, vertical sectional views, rear views, and cross sections of decorative plates used in the above telephone jack, respectively. Figure and enlarged sectional view of main parts, Figure 6a
to f are a front view, a partially broken bottom view, a rear view, a vertical cross-sectional view, an enlarged front view of the main parts, and an enlarged cross-sectional view of the main parts, respectively, of the base plate used in the above telephone jack;
Figures 7a to c are a front view, right side view, and bottom view of the shutter used in the above telephone jack, Figure 8 is a perspective view of a modular plug plugged into the same jack unit, and Figure 9 is the same as the above. Figures 10a to 10c are a front view, a top view, and a left side diagram showing the state of a semi-finished contact spring used in a jack unit according to another embodiment of the present invention, respectively. 11a to 11c are a front view, a top view, a left side view, and FIGS. 12a and 12b, respectively, showing the state of a semifinished contact spring used in a jack unit according to still another embodiment of the present invention. These are a front view and a longitudinal cross-sectional view of a conventional example, respectively. 1 is a jack unit, 5 is a contact spring, 10 is a jack housing, 11 is a plug insertion port, 16
51 is a press-fitting groove, 51 is a lead wire crimping piece, 52 is a pitch alignment part, 53 is an L-shaped part, 54 is an elastic contact piece, 5
8 is a groove.

Claims (1)

[Scope of utility model registration request] a jack housing having a plurality of insulating partition walls arranged at predetermined intervals on one side of a plug insertion opening;
A plurality of contact springs are disposed between each insulating partition wall and have one end extending toward the inside of the plug insertion opening, and a plurality of contact springs are connected to the other ends of the contact springs within the jack housing. In a jack unit for a telephone comprising a lead wire drawn out to the outside, the contact springs are aligned in a line in the same plane with a pitch wider than the spacing pitch of the insulating partition walls, and the contact springs are arranged in a line in the same plane with a pitch wider than the spacing pitch of the insulating partition walls, and the contact springs are arranged in a line in the same plane at a pitch wider than the spacing pitch of the insulating partition walls. A lead wire crimping piece is provided with a vertical split groove, and the lead wire crimping piece extends from the end of the lead wire crimping piece on the opposite side from the split groove in a plane substantially perpendicular to the surface of the lead wire crimping piece, and is insulated. a pitch matching part that converges to obtain the same pitch as the separation pitch of the partition; an L-shaped part connected to the convergence side end of the pitch matching part and bent so as to be folded back parallel to the lead wire crimping piece; It has an elastic contact piece that is connected to the folded side end of the L-shaped part and extends to the inside of the plug insertion opening, and is entirely formed of a conductive plate having appropriate elasticity, and the insulating partition wall The jack housing is provided so as to insulate and isolate the portion from the letter-shaped portion to the base end of the elastic contact piece, and a lead wire crimping piece is press-fitted into the jack housing, and the lead wire is inserted between the grooves of the lead wire crimping piece. A jack unit for a telephone comprising a press-fitting groove for guiding a lead wire crimping piece so as to be sandwiched therein.