JPH0537430Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a modular telephone jack in which an insert block having a contact spring for electrical contact with a plug is disposed within the casing.

[Background Art] Conventionally, as shown in FIG. 17, this type of telephone modular jack has a casing 1 having a shape that can be attached to a standardized ready-made mounting frame that is attached to a recessed box. is provided. A plug insertion opening 21 is formed on the front surface of the casing 1, into which a plug can be inserted. In this telephone module jack, the first
As shown in Fig. 8, an insert block 3 is installed in the casing 1, and a lead wire 101 drawn out from the insert block 3 is connected to the terminal plate 1.
It is designed to be soldered to 02. In the insert block 3, as shown in FIG. 19, a crimping portion 105 provided at one end of a lead wire 101 is crimped to a contact spring 104 inserted into a molded block body 103.

By the way, in the conventional telephone modular jack of this type, the tension stop for the external line (telephone cable) was not provided in the casing 1, so a tension stop was required separately, and the tension stop in the recessed box was not provided. There was a problem that the storage space became small and construction became troublesome. In addition, there are cases where it is desired to attach a capacitor block for inspection to a telephone modular jack, but it has a small casing 1 with a shape that can be attached to a ready-made mounting frame standardized for wiring equipment as described above. In a telephone modular jack, it is difficult to provide a storage space for a capacitor block inside the casing 1, and at present, this type of telephone modular jack is not provided with a capacitor block.

[Purpose of the invention] The present invention was made in view of the above points, and its purpose is to eliminate the need for a tension stopper as a separate member and to avoid compressing the storage space in the recessed box. To provide a telephone modular jack which can be equipped with a capacitor block as required.

[Disclosure of the invention] (Configuration) The telephone module jack according to the invention is:
In a telephone modular jack equipped with an insert block in the casing having a contact spring that electrically contacts a plug inserted through a plug insertion opening opened on one side of the casing, an insert block is installed in one side of the casing different from the plug insertion opening In addition to forming a terminal portion for connecting an external electric wire, a recessed groove with a size that allows the capacitor block to be stored is formed near the terminal portion, and the external electric wire connected to the terminal portion is formed on the bottom of the recessed groove. A wire holding rib is provided that can be held between the peripheral wall of the concave groove and can be cut out from the casing at the base.

By adopting the above configuration, the external electric wire connected to the terminal part can be held between the peripheral wall of the recessed groove and the electric wire holding rib, and the electrical connection state of the external electric wire to the terminal part is maintained between the external electric wire and the terminal part. In addition to preventing the wire from being affected by the tension acting on the wire, if it is necessary to install a capacitor block, the concave groove can be used as a storage space for the capacitor block by cutting out the wire holding rib. be. In this way, the concave groove is used both as a tension stopper for external electric wires and as a storage space for the capacitor block, and when used for tension stoppage of external electric wires, the wire holding ribs protruding from the bottom of the concave groove are used.
When storing a capacitor block, which is relatively infrequent, it can be easily accommodated by cutting off the wire holding ribs.

(Example 1) In the following description, the term "vertical direction" is used based on FIG.
Although the direction orthogonal to the up-down direction and the left-right direction is defined as the front-back direction, these terms are used for convenience and are not intended to limit the form of use.

As shown in FIGS. 1 to 3, the telephone modular jack includes a body 10 and a cover 2.
0, an insert block 3, a terminal block 4,
It is composed of a middle frame 5 and a door block 6.

The casing 1 is made of an insulating material such as synthetic resin, and has mounting dimensions equivalent to one module of the wiring equipment so that it can be attached to a standardized ready-made mounting frame that is attached to the recessed box. It is set. The body 10 is open at the top, and outer flange pieces 11 extend from the left and right edges of the opening, and engagement holes 12 are formed at the tips of the outer flange pieces 11, respectively, passing vertically through the body 10. On the other hand, outer flange pieces 22 are provided at both left and right ends of the cover 20, facing the outer flange pieces 11 of the body 10, and hooks 23 are provided at the lower ends of the tips of the outer flange pieces 22, respectively.
An engaging piece 24 having a shape extends downward, and the body 10 and the cover 20 are coupled by engaging the hook 23 of the engaging piece 24 with the engaging hole 12. The engagement piece 24 is provided with a temporary engagement protrusion 25 that protrudes below the hook 23, and as shown in FIG. By inserting the temporary engagement protrusion 25 into the cover 2 on the production line,
After supplying 0, the position of the cover 20 with respect to the body 10 is stabilized until the cover 20 is pressed against the body 10 and connected (snap-in), and the position of the cover 20 with respect to the body 10 is prevented from shifting or tilting. I'm starting to do that. With this configuration, the supply of the cover 20 and its connection to the body 10 can be automated, leading to improved productivity.

The interior of the body 10 is divided into three compartments on the left and right by a pair of left and right partitioning ribs 13, and each compartment on both the left and right sides is further divided into three compartments by partitioning ribs 14, so that one terminal block 3 can be stored. Six terminal storage chambers 15 of the same size are formed. As shown in FIGS. 3 and 5, grooves 13a are formed on the upper surface of the partitioning rib 13 at portions corresponding to the respective terminal storage chambers 15, and grooves 13a are formed on the upper surface of the partitioning rib 13 at portions corresponding to the grooves 13a. An insertion slit 13b is formed that opens toward the edge. Furthermore, a positioning rib 16 is provided within the section between the two partitioning ribs 13 to protrude from the inner bottom surface of the body 10. The positioning rib 16 is formed at approximately the center of the body 10 in the left-right direction and at a position offset from the center in the front-rear direction. That is, if the body 10 did not have the positioning rib 16, it would be approximately line symmetrical in the front, rear, left, and right directions, but by forming the positioning rib 16, the body 10 becomes asymmetric in the front and rear directions. This makes it easier to detect. A groove 17 running in the front-rear direction is formed on the lower surface of the body 10 at a portion corresponding to the partitioning ribs 13. At the center of the bottom surface of the groove 17, as shown in FIGS. 3 and 4, a groove 17 is formed. A wire holding rib 19 having a hook portion 18 projecting left and right at its lower end is provided in a protruding manner.

The cover 20 has a plug insertion slot 2 in the center of the top surface.
1 opens. A pair of connecting claws 26 is provided protruding from the tip edges of the left and right outer flange pieces 22 of the cover 20, and a coupling hole 27 is formed at the base of the outer flange piece 22 at a portion corresponding to between the two connecting claws 26. has been done. As shown in FIG.
A pair of left and right pressing ribs 28 protruding from the lower surface of the
is installed protrudingly. Furthermore, a pair of left and right guide ribs 29 are provided protruding from the lower surface of the opening periphery of the plug insertion port 21 . At the lower end of each guide rib 29, holding ribs 29a are provided which protrude toward each other and hold the door block 6.

The insert block 3 has a plurality of contact springs 3
1 and a lead piece 32 integrally continuous with each contact spring 31 are formed by punching an elastic sheet metal, and these are inserted into a block body 33 made of synthetic resin, which is an insulating material. . The block main body 33 includes a base 33a which has a pair of legs substantially parallel to the partition rib 13 and is formed into a substantially U-shape in a plane orthogonal to the vertical direction, and a center piece of the base 33a which is protruded from the upper surface of the base 33a. It has a protrusion 33b. The contact spring 31 protrudes from the upper surface of the protrusion 33b and is bent downward, so that it can be bent in the front-rear direction. In addition, the lead piece 32
protrude from the outer surface of each leg piece of the base 33a, and the tip portion thereof is bent downward to form a substantially L-shape. A press-contact slit 34 is formed at the lower end of each lead piece 32 and opens toward the lower edge. The middle frame 5 is fitted into a portion of the insert block 3 corresponding to the protrusion 33b. The middle frame 5 has a vertically penetrating guide hole 51 for guiding the plug, and comb teeth (not shown) are formed in the guide hole 51 to separate the contact springs 31 so that they do not come into contact with each other. Further, on the lower surface of the middle frame 5, an engaging leg 52 that is inserted between the legs of the block body is provided protrudingly, and on both left and right sides of the middle frame 5, a pair of protrusions 53 are provided.
is formed. Further, a fitting groove 54 is formed in the middle frame 5 at a position different from the guide hole 51, into which a part of the protrusion 33b of the insert block 3 is inserted. In this way, by fitting the insert block 3 and the middle frame 5, they are positioned.

The terminal block 4 includes a terminal frame 41 made of a conductive material and formed into a substantially U-shape that opens downward;
A slit 43 is formed in one leg of the terminal frame 41, and a locking piece 44 is formed by cutting and bending in the center of the other leg. ing. In addition, the terminal frame 4
1 is provided with a pressing piece 45 extending toward the leg piece provided with the slit 43. The lock spring 42 is formed by bending an elastic metal plate to have a pair of lock pieces 46a, 46b, each of which is divided by a slit 47a, 47b. . Terminal frame 4
When the lock spring 42 is installed in the slit 4
The base end of 7b engages with the locking piece 44, and the locking spring 42
is held within the terminal frame 41 and turned into a block. Here, telephone wire generally has a wire diameter of
It is 0.4 to 0.65 mm, and it is necessary to set the contact pressure between the locking piece 46b and the terminal frame 41 so that the telephone line can be inserted at the time of connection, and the contact pressure for the thinnest telephone wire can be ensured. In order to satisfy this condition, the distance between the base piece of the lock spring 42 and the tip of the lock piece 46b is set to be equal to the distance between both legs of the terminal frame 41. However, since the terminal frame 41 and the lock spring 42 are made into blocks, the lock spring 42 is not deformed when the terminal block 4 is assembled into the body 10, and the quality is stabilized to meet the above conditions. It is possible to do so. Further, the terminal block 4 is housed in each terminal storage chamber 15 of the body 10 as needed.
4 terminal blocks 4 are installed for a 4-fiber type, and 6 terminal blocks 4 are installed for a 6-core type.

A door block 6 is attached to a portion corresponding to the plug insertion port 21 in order to prevent dirt and the like from entering the casing 1 from the plug insertion port 21 when no plug is inserted. The door block 6 is formed by combining an upper door body 61 and a lower door body 62. The upper door body 61 closes half of the plug insertion opening 21, and the lower door body 62 closes the other half of the plug insertion opening 21. It's becoming blocked. Lower door body 6
2 has an operating piece 63 protruding from it. Operation piece 63
The protrusion dimension is set to such an extent that it protrudes slightly from the front surface of the cover 20. The door block 6 is the middle frame 5
It is attached between the upper surface of the cover 20 and the lower surface of the opening periphery of the plug insertion opening 21 of the cover 20. The door block 6 is mounted between a pair of guide ribs 29 protruding from the back surface of the cover 20, and is locked by a holding rib 29a to prevent it from falling off. With the above structure, when inserting a plug into the plug insertion opening 21, it is sufficient to bring the plug into contact with the operating piece 63 and push the operating piece 63 to move the door block 6 upward; When the plug is removed from the plug insertion opening 21, the door block 6 falls downward under its own weight, and the plug insertion opening 21 is automatically closed.

On the bottom of the body 10, as shown in FIG.
The leg piece of the terminal frame 41 and the locking piece 46a of the locking spring 42,
A pair of wire insertion ports 71 are provided at positions corresponding to the tip end portions of the wires 46b, and a release piece 72 is provided adjacent to the wire insertion ports 71. Release piece 7
2 has a substantially U-shaped base extending from the side wall of the body 10, and is vertically flexible. The distal end of the release piece 72 is in contact with the lower surface of the distal end of the lock piece 46b, and when the release piece 72 is pushed upward from the lower surface side of the body 10, the lock piece 46b is bent. Further, the release piece 72 has a groove 73 formed in a portion exposed on the lower surface of the body 10 into which a jig such as the tip of a driver can be inserted. However, when connecting a telephone line, if the telephone line is inserted into the wire insertion port 71, the telephone line is held between the lock pieces 46a, 46b and the legs of the terminal frame 41, and when the telephone line is removed, By inserting a jig into the groove 73 and pressing the release piece 72 inward of the body 10, the lock spring 42 can be bent away from the leg piece of the terminal frame 41, and the telephone line can be easily removed. .

Telephone cable 7 that bundles connected telephone lines
As shown in FIGS. 7 and 8, the concave groove 17
The wire is held by the hook 18 by passing through the space between the peripheral wall of the wire and the wire holding rib 19 . As a result, the tension on the telephone cable 7 is secured, and the tension on the telephone cable 7 can be secured without using any separate parts.
In addition, a groove 17 formed on the lower surface of the casing 1
Since the tension is secured within the casing 1, the vertical dimensions of the casing 1 do not increase, and the casing 1 can be easily stored in the embedding box even though the tension is secured. The wire holding rib 19 is removable at the base, and when connecting the capacitor block 8, the wire holding rib 19 is cut out and the capacitor is placed in the groove 17, as shown in FIGS. 9 and 10. It is designed to accommodate block 8. With this configuration, it is possible to prevent an increase in the storage space even though the capacitor block 8 is provided, and it is possible to easily store it in an embedded box.

In assembling the telephone modular jack constructed as described above, after the terminal block 4 is installed in the body 10, the insert block 3 with the inner frame 5 attached thereto is installed in the body 10. The terminal block 4 is installed so that the pressure contact piece 45 is accommodated in the insertion slit 13b.
In addition, when the insert block 3 is fitted with the middle frame 5, the center piece of the block main body 33a is sandwiched between the upper end of the positioning rib 16 and the peripheral wall of the body 10, and the position is fixed. Piece 3
2 is placed in the groove 13a. Therefore, when the insert block 3 is pressed against the body 10 side, the press-fit piece 45 of the terminal frame 41 is press-fitted into the press-fit slit 34 of the lead piece 32, and the electrical connection between the lead piece 32 and the terminal block 4 is A connection is made. Here, the positioning rib 16 is used not only to fix the insert block 3 but also to determine the direction of the body 10. With the above configuration, it is not necessary to wire lead wires as in the conventional case, and assembly can be easily automated. After that, when the cover 20 with the door block 6 attached is fitted onto the body 10 and the cover 20 is pressed against the body 10, the hook 23 of the engagement piece 24 engages with the engagement hole 12, and the body 10 and cover 20 are combined. When the cover 20 is placed on the body 10, the temporary coupling protrusion 25 is inserted into the engagement hole 12 as described above, so that the cover 20 is temporarily fixed to the body 10. . Further, when the cover 20 is pressed against the body 10, the lower end edge of the guide rib 29 touches the protrusion 5 of the middle frame 5, as shown in FIG.
The pressing rib 28 formed on the lower surface of the body 10 prevents the inner frame 5 from shifting.
comes into contact with the upper surface of the terminal frame 41 of the terminal block 6, thereby preventing the terminal block 6 from wobbling.

The telephone modular jack described above can be attached to a standardized ready-made mounting frame that is attached to a recessed box. That is, if the mounting frame is made of synthetic resin, the coupling claws 26 may be engaged with the mounting frame, and if the mounting frame is made of metal, the coupling holes 27 may be engaged with the mounting frame. The state of connection with the mounting frame is well known in the field of wiring devices, so a description thereof will be omitted.

(Example 2) In Example 1, a wire holding rib 19 having a hook portion 18 is provided in a groove 17 formed on the lower surface of the body 10.
However, in this embodiment, as shown in FIGS. 11 and 12, hook-shaped hook portions 18a are formed at the lower ends of both side walls of the groove 17, and wire holding ribs 19a are provided on the side surfaces. It has a shape without any protruding parts. Even when formed in this way,
The space formed between the wire holding rib 19a and the circumferential wall of the groove 17 has the same shape as in the first embodiment, so that the tension on the telephone cable 7 can be tightened as shown in FIGS. 13 and 14. It can be done and has the same effect. Further, the electric wire holding rib 19a can be removed from the body 10, and if the electric wire holding rib 19a is removed, the 15th
The capacitor block 8 can be mounted in the groove 17 as shown in FIG. In this case, since the capacitor block 8 is engaged with the hook portion 18a, the position of the capacitor block 8 is fixed.

[Effects of the invention] As described above, in the present invention, a groove of a size that allows the capacitor block to be stored is formed near the terminal part, and the external electric wire connected to the terminal part is placed in the groove on the bottom of the groove. Since there is a protruding wire holding rib that can be held between the peripheral wall of the groove and can be removed from the casing at the base, the external electric wire connected to the terminal part can be held between the peripheral wall of the groove and the wire holding rib. In addition, when it is necessary to provide a capacitor block, it is possible to prevent the electrical connection state of the external wire to the terminal part from being affected by the tension acting on the external wire. By cutting off the wire holding rib, the concave groove can be used as a storage space for the capacitor block. In this way, the groove can be used both as a tension stopper for external wires and as a storage space for the capacitor block.
In addition, when used to hold tension on external electric wires, the wire holding ribs protruding from the bottom of the groove can be used, and when storing capacitor blocks, which are relatively infrequent, it can be easily accommodated by cutting out the wire holding ribs. It has advantages.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing Embodiment 1 of the present invention;
Figure 2 is a partially cutaway plan view of the same as above, Figure 3 is a partially cutaway front view of the same as above, Figure 4 is a bottom view of the same as above, Figure 5 is a plan view of the body used in the same as above, Figure 6 is A seventh cross-sectional view showing the engagement portion between the engagement piece and the engagement hole as described above.
Figures 8 and 8 are a partially cutaway front view and a bottom view, respectively, of the same device with a telephone cable connected to it, and Figures 9 and 10 are a partially cutaway front view and bottom view, respectively, of the same device with a capacitor block attached. 11 is a partially cutaway front view showing Embodiment 2 of the present invention, FIG. 12 is a bottom view of the same, and FIGS. 13 and 14 are partially cutaways of the same with a telephone cable connected. 15 and 16 are a partially cutaway front view and a bottom view of the same device as above, respectively, with a capacitor block attached, and FIG. 17 is a perspective view showing the telephone modular jack according to the present invention. , 1st
FIG. 8 is a sectional view showing a conventional example, and FIG. 19 is a sectional view showing a conventional insert block. 1 is the casing, 3 is the insert block, 7
is a telephone cable, 8 is a capacitor block, 17 is
18 and 18a are hook portions, 19 and 19a are wire holding ribs, 21 is a plug insertion opening, and 31 is a contact spring.

Claims (1)

[Scope of utility model registration request] In a telephone modular jack equipped with an insert block in the casing having a contact spring that electrically contacts a plug inserted through a plug insertion opening opened on one side of the casing, an insert block is installed in one side of the casing different from the plug insertion opening In addition to forming a terminal portion for connecting an external electric wire, a recessed groove with a size that allows the capacitor block to be stored is formed near the terminal portion, and the external electric wire connected to the terminal portion is formed on the bottom of the recessed groove. A telephone modular jack comprising a protruding electric wire holding rib that can be held between a peripheral wall of a concave groove and that can be removed from a casing at its base.