JP2000048889A - Modular jack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a modular jack for facilitating detaching work of a lever from a housing. SOLUTION: A housing 10 is provided with a plug connection table 1 having a plug inserting port to be detachably inserted with a modular plug. Terminals 42 formed of pressure terminals are electrically connected to contacts to be connected with the modular plug. A bearing part 33a is provided on the housing 10, a rotary shaft 50 provided on a lever 5 is fitted to the bearing part 33a, and the lever 5 is pivotally supported on the housing 10. When the lever 5 is in such a position as to release the terminals 42, the lever 5 is allowed to abut against the plug connecting table 1 at the different position from the rotary shaft 50, and this position serves as a fulcrum, when the rotary shaft 50 is detached from the bearing part 33a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a modular jack to which a twisted pair cable serving as a transmission path for indoor communication is mainly connected.

[0002]

2. Description of the Related Art Conventionally, when constructing a LAN (local area network) system using Ethernet, four
Twisted pair cables in which an eight-core twisted pair wire is housed in a sheath are widely used (10BASE-T or the like). Twisted pair cables have the advantage that they are relatively inexpensive and flexible, so that they can be easily wired. When connecting twisted pair cables to each other or to other devices,
Modular jacks are often used.

[0003] By the way, as this kind of modular jack, the one shown in Figs. 12 to 16 has been proposed. The housing 10 of the modular jack includes a plug connection base 1 having a plug insertion port 11 into which a modular plug is removably inserted. A plurality of contacts 41 that can contact the contact
Are arranged. Each contact 41 has a terminal 42
Are electrically connected to each other, and the terminals 42 are arranged so as to protrude from the housing 10 at portions different from the plug connection base 1.

The terminal 42 is a press contact terminal having a press contact slit 42a, and has a structure in which when an electric wire is press-fitted into the press contact slit 42a, the core wire is sandwiched while cutting the insulating coating on both side edges of the press contact slit 42a. When this type of terminal 42 is used, it is necessary to press-fit the wires in a state where they are aligned with the position of the terminal, and this operation is performed without using a separate tool or jig. , The lever 5 is pivotally supported at a portion different from the plug connection base 1.

The lever 5 can be raised and lowered between a position where the lever 42 is covered and a position where the terminal 42 is opened. Further, it has a plurality of separation plates 52 located between the wires and a separation hole 54 into which the tip of each wire is inserted, and the separation plates 52 and the separation holes 54 align the wires. A terminal 42 is provided between the separation plate 52 and the separation hole 54.
The press-fit groove 55 is formed at a position corresponding to the above. When the lever 5 is tilted, the wire is pressed before and after the press-fit groove 55 so that the wire can be pressed into the press-contact slit 42 a of the terminal 42.

As a pivotal structure between the lever 5 and the housing 10, a rotation shaft 50 is provided on the lever 5 and
A structure is adopted in which the rotating shaft 50 is fitted into the bearing portion 33a provided in the above. The bearing portion 33a is open on the side opposite to the plug connection base 1, so that the rotary shaft 50 can be attached and detached.

[0007]

According to the above construction, the lever 5 can be detached from the housing 10. However, when the lever 5 is detached from the housing 10, the rotating shaft 50 is moved from the bearing portion 33a. It is necessary to pull the lever 5 to pull it out, and the work of removing the lever 5 is not easy. Although it is not necessary to remove the lever 5 much, it is necessary to remove dirt from the terminal 42 and the like. Therefore, it is desirable that the lever 5 can be easily removed while not being easily removed.

When the lever 5 is raised, the position of the lever 5 is regulated by the contact of the lever 5 with a part of the housing 10. In the conventional configuration shown in FIG. , The lever 5 cannot be opened sufficiently large. That is, the rotation range of the lever 5 is small. As a result, in the operation of arranging the electric wires, it is difficult to visually recognize the separation plate 52 and the separation hole 54, and the operation of arranging the electric wires at the time of connection is somewhat troublesome.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to facilitate the work of removing a lever from a housing, and further facilitate the work of aligning wires when connecting them. The object is to provide a modular jack.

[0010]

According to the first aspect of the present invention, there is provided a housing having a plug connection base having a plug insertion port into which a modular plug is removably inserted, and a modular plug inserted into the housing through the plug insertion port. A plurality of contacts arranged in the housing so as to resiliently contact the contacts, and an insulating coating which is electrically connected to each contact and is arranged so as to protrude from the housing at a portion different from the plug connection base. When an electric wire is press-fitted into the press-fitting slit, it is pivotally supported by a plurality of terminals consisting of press-fitting terminals that sandwich the core wire while cutting the insulation coating on both side edges of the press-fitting slit, and a bearing portion provided in a portion of the housing different from the plug connection base. It has a rotating shaft and holds multiple wires connected to each terminal in an aligned form. And a lever to be freely undulating between a position to open position and a terminal press-fitting the electric wire to Tsu bets,
The rotating shaft is detachable by opening the surface of the bearing opposite to the plug connection base, and when the lever is in the position to open the terminal, the lever contacts the plug connection base at a position different from the rotation shaft and the The lever is formed in a shape whose position becomes a fulcrum when the rotating shaft is removed from the bearing portion.

According to a second aspect of the present invention, in the first aspect of the present invention, when the lever of the plug connection base is in the position to open the terminal, the portion where the lever comes into contact is formed in the housing from the bearing toward the plug connection base. The inclined surface is inclined so as to increase the distance from the surface on which the terminals are provided.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 to 4, a housing 10 includes a plug connection base 1 and a terminal base 2, which are molded products of synthetic resin having an insulating property. Terminal base 2
Holds a conductor 4 (see FIG. 5) that electrically connects the contact 41 and the terminal 42 via the connection conductor 43, and is connected to the plug connection base 1 to form a modular jack. The conductors 4 are formed by stamping a sheet metal having elasticity, and eight conductors 4 are held on the terminal base 2. The terminal base 2 is formed of two members, a base 20 and a holder 30, and the holder 30 is adhered to the upper surface of the base 20. In order to facilitate the description, the directions in which the terminal 42 projects from the terminal base 2 with the plug insertion port 11 (see FIG. 6) viewed from the front will be described in order to facilitate the description. Although it is above, it is not intended to restrict the mounting direction of the modular jack.

As shown in FIGS. 6 to 9, the plug connection base 1 has a plug insertion port 11 into which a modular plug is inserted.
Is a hollow body having an opening at the upper part of the front surface and a mounting hole 12 into which the front end of the terminal base 2 is inserted, which is open at the lower part of the rear surface. The separation slits 13 are formed.

The base 20 has, at its front end, a connecting support piece 21 that contacts the lower surface of the plug connection base 1, and has at its rear end a holding base mounting plate 22 on which the holding base 30 is mounted. On the lower surface of the plug connection base 1, a connecting groove portion 14 having a width substantially corresponding to the left and right width of the connecting support piece 21 is formed, and on the inner bottom surface of the connecting groove portion 14, a substantially T-shaped connecting protrusion 15 is formed. You. The coupling support piece 21 has a substantially T-shaped coupling hole 23 that can be engaged with the coupling projection 15. The coupling hole 23 is provided with a notch groove 23a which is desirably opened at the front edge of the connection support piece 21, and the flexibility of the front end of the connection support piece 21 is improved by the notch groove 23a. Further, on both sides of the base of the connection support piece 21, an insertion locking piece 24 is protruded at a position shifted upward with respect to the connection support piece 21, and the insertion locking piece 24 is provided in a mounting hole formed in the plug connection base 1. 12 below. Thus, the base 20 is temporarily held on the plug connection base 1 by the insertion locking piece 24 being locked inside the plug connection base 1 and the connection support piece 21 abutting against the lower surface of the plug connection base 10. become.

On the other hand, the holding base 30 has a contact support base 31 for holding the contact 41 at the front end, and a terminal 42.
Is provided at the rear end with a terminal support 32 protruding toward the upper surface. A lever support 33 is provided on the upper surface of the terminal base 2 at a position between the contact support 31 and the terminal support 32. As shown in FIG. 5, a positioning groove 34 for positioning the conductor 4 is formed on the front end of the contact support 31 and the lower surface of the holding base 40, and the terminal 42 is vertically penetrated through the terminal support 32. Terminal insertion hole 35 to be inserted
Are formed.

Except for one side located on the lower surface side of the plug connection base 1 in the peripheral portion of the base 20, one connecting hook 25 is continuously and integrally provided on each of the remaining three sides.
Further, a coupling groove 37 that engages with the coupling hook 25 is formed in a peripheral portion of the holding table 30. At the upper end of each coupling hook 25, a coupling claw 25a is protruded inwardly of the base 20. Here, when the coupling hook 25 is engaged with the coupling groove 37, the coupling hook 25 comes into contact with the three side surfaces of the holding table 30, and the coupling hook 25 is settled in the coupling groove 37. Is abutted against the plug connection base 1 and is prohibited from moving forward.
As a result, the relative movement of the base 20 and the holding table 30 in a plane along the opposing surface of both is prohibited. In short, the base 20 and the holding table 30 are formed by the connecting hook 25 and the connecting groove 37.
Relative movement is prohibited. The coupling claw 25a locks the upper surface side of the holding table 30 to prohibit the holding table 30 from floating from the base 20. Therefore, the holding table 30 is fixed to the base 20 by the connecting hook 25 and the connecting groove 37.

As described above, the holding table 30 is fixed to the base 20 by the concave and convex engagement of the connecting hook 25 and the connecting groove 37. Therefore, the base 20 and the holding table 30 can be connected without using an adhesive. Is possible. If no adhesive is used, the adhesive does not protrude, leading to a further improvement in yield. Further, as compared with the case where an adhesive is used, a waiting time for waiting for the curing of the adhesive does not occur, and the productivity can be improved. If it is necessary to further increase the bonding strength between the base 20 and the holding table 30, it is possible to use an adhesive together. Even in the case of using an adhesive, the base 20 and the holding table 30 do not slide relative to each other in the assembling process. In comparison, the yield is improved.

Incidentally, a twisted pair cable is generally connected to the terminal 42 as an electric wire, and the amount of crosstalk between each pair constituting the twisted pair cable is affected by the arrangement of the conductor 4. However, since the arrangement of the contacts 41 and the arrangement of the terminals 42 are fixed, the connection conductors 43 are actually arranged so as to reduce crosstalk. In this case, it is necessary to cross a part of the connection conductor 43, so that a part of the connection conductor 43 is arranged vertically. That is, as shown in FIG.
Part of the connection conductor 43 is arranged in two layers, upper and lower.

In order to arrange the upper and lower layers, it is necessary to form a gap between the opposing surfaces of the base 20 and the holding table 30. Therefore, a protruding base 20a is formed on a part of the upper surface of the base 20 so as to protrude above other parts.
The holding table 30 is placed on the table. With this configuration, the base 20 is formed at a portion where the pedestal 20a is not formed.
A gap is formed between the connection conductor 43 and the holding table 30, and the connection conductor 43 can be formed into two layers. Further, the protruding base 20a is also continuous below the terminal 42. When the distal end surface of the protruding base 20a abuts on the lower end of the terminal 42, the terminal 42 sinks downward when a wire is pressed into the terminal 42. Can be prevented.

To connect the terminal base 2 to the plug connection base 1, the contact support base 31 is inserted into the mounting hole 12 with the base 20 and the holding base 30 connected. Terminal base 2
On both side surfaces of the contact support 31, engagement protrusions 31 a are protruded, and on the inner surface of the plug connection base 1, a terminal guide 2 guides the terminal base 2 in a state of being engaged with the engagement protrusion 31 a. Groove 1
0a is formed. Therefore, when the terminal base 2 is moved forward in a state where the engaging ridges 31a are engaged with the engaging grooves 10a, the holding table 30 is brought into contact with the engaging ridges 31a and the engaging grooves 10a.
a, the base 20 is connected to the connecting support piece 2.
Since the position is regulated by the first groove 1 and the connecting groove 14, the terminal base 2 can be inserted to a predetermined position while regulating the position with respect to the plug connection base 1. When the terminal base 2 is inserted to a fixed position, the lever support 33 formed at an intermediate portion of the terminal base 2 in the front-rear direction comes into contact with the rear surface of the plug connection base 1 so that the plug of the terminal base 2 can be inserted. The amount of insertion into the connection base 1 is regulated.

The coupling projection 1 provided on the plug connection base 1
5, the coupling hole 23 of the base 20 is engaged,
, The rearward movement of the terminal base 2 is prohibited. At this time, the insertion locking piece 24 of the base 20 and the contact support piece 31 of the holder 30 are attached to the mounting hole 12 of the plug connection base 1.
Is inserted into. Here, when a downward force acts on the rear end of the terminal base 2, the connecting support piece 21 tends to move upward with the insertion locking piece 24 as a fulcrum. The upward movement is prohibited because of contact with the lower surface, and as a result, the rear end of the terminal base 2 is prevented from moving downward. When an upward force acts on the rear end of the terminal base 2, the connection support piece 21 tends to move downward with the insertion locking piece 24 as a fulcrum. , So that the rear end of the terminal base 2 is prohibited from moving upward. Although the engaging ridges 31a and the engaging grooves 10a also contribute to the vertical movement of the terminal base 2, the vertical movement is more reliably controlled by the above-described operation. In short, the plug connection base 1 and the terminal base 2 are joined by partially engaging each other, but are firmly joined so as to prevent rattling.

By the way, the contact 41 is arranged on the contact support base 31 so as to extend from the front end to the rear upper side.
When the contact support 31 of the terminal base 2 is inserted into the plug connection base 1, each contact 41 is connected to each of the separation slits 13.
To each contact 4 by each separation slit 13.
1 is guided. With the terminal base 2 connected to the plug connection base 1, the rear end of the contact 41
3 are kept inserted, and the contacts 41 are separated so as not to contact each other. Thus, contact 4
By inserting the plug 1 into the plug connection base 1, the contact 41 can elastically contact the contact of the modular plug inserted into the plug connection base 1 through the plug insertion port 11.

The modular jack shown in the figure is for connecting a 4 to 8 core twisted pair cable 1, and eight conductors 4 are held on a terminal base 2. Each conductor 4
The terminal 42 provided in the terminal 30 is provided in the terminal insertion hole 35 provided in the holder 30.
Is inserted from below and protrudes from the upper surface of the terminal support 32,
It is arranged in two rows before and after. The terminal 42 is of a pressure contact type formed in a fork shape having a pressure contact slit 42a having an open upper end edge between a pair of teeth.
Is set so that both side edges of the pressure contact slit 42a are pressed against the core wire of the electric wire to be connected. That is, when an electric wire having an insulating coating is press-fitted into the press-fitting slit 42a from above, the insulating coating of the electric wire is cut at both side edges of the press-fitting slit 42a, and the press-fitting slit 42a is peeled off while removing the insulating coating.
The core wire is introduced into the inside, and the core wire is sandwiched between both side edges of the press contact slit 42a. This terminal is a well-known terminal called an IDC terminal. In the illustrated example, in order to connect the wires to the terminal 42 without using a separate tool or jig, an alignment function for holding a plurality of wires together and a press-fitting function for press-fitting the wires into the press-fitting slit 42a of the terminal 42. A pair of levers 5 of a synthetic resin molded product having
Is provided. Although both levers 5 are formed in different shapes, they are formed in shapes that are symmetric on the left and right.

The lever 5 is pivotally supported via a rotary shaft 50 to a bearing 33a formed continuously and integrally with each lever support 33. The rotation shaft 50 is fixed to the lever 5,
It rotates with the lever 5 with respect to the bearing portion 33a. That is, the lever 5 is rotatable about the bearing 33a, and can be raised and lowered between a position covering the terminal base 2 and a position at which the terminal base 2 is opened. Bearing part 33a
Is open on the rear side.

Here, the maximum angle at which the lever 5 is raised is restricted by the contact between the lever 5 and the plug connection base 1 as shown in FIG. That is, when the lever 5 is raised on the plug connection base 1, the portion where the lever 5 comes into contact (that is, the upper part of the rear surface of the plug connection base 1) is the inclined surface 10 b that is inclined backward and downward. The upper surface of the terminal base 2 is opened sufficiently widely. Since the inclined surface 10b is formed on the upper rear surface of the plug connection base 1, the rotation range of the lever 5 can be increased, and when the lever 5 is raised, the rear surface of the lever 5 is connected to the terminal base. It can be made substantially perpendicular to the upper surface of the table 2. Also, lever 5
The upper surface of the lever 5 in a state where the lever 5 is tilted (the state of the solid line in FIG. 1) is bent so as to protrude upward at an intermediate portion between the front and rear, and when the lever 5 is raised, the upper portion of the above-described inclined surface 10b is supported by a fulcrum. The rotation shaft 50 can be detached from the bearing portion 33a. Thus, lever 5
When the lever 5 is removed, a portion relatively far from the rotation shaft 50 can be used as a fulcrum, so that the operation of removing the lever 5 becomes easy.

The terminal support 3 of the lever 5
On one surface of the second side, three separating plates 52 (see FIG. 2) projectingly holding the electric wires connected to the respective terminals 42 are provided in a protruding manner. Separation passages through which the electric wires pass are formed between each side wall of the lever 5 and the separation plate 52 or between adjacent separation plates 52. Each separation passage is provided with a projection (not shown) for retaining so as to hold the electric wire. further,
A separation hole 54 (see FIG. 3) for separating and holding the distal end of the electric wire is formed in a portion of the lever 5 near the rotation shaft 50. Therefore, the electric wires can be aligned between the separation passage and the separation hole 54. Since the operation of aligning the wires is performed before connecting the wires to the terminals 42, the lever 5 is raised at this time, and the rear surface when the lever 5 is raised as described above is placed on the upper surface of the terminal base 2. Since it is largely open substantially perpendicular to the opening, it is easy to pass the electric wire through the separation passage and the separation hole 54.

On the other hand, the lever 5 has a separation passage and a separation hole 5.
As shown in FIG. 11, two press-fitting grooves 55 running in the axial direction of the rotating shaft 50 are formed at a portion between the press-fitting grooves 55. Each press-fit groove 5
Reference numeral 5 denotes a terminal 4 when the lever 5 approaches the terminal base 22.
2 is formed so that the front end thereof is inserted, and the electric wire is pressed against the terminal 42 before and after the press-fit groove 55. In short, when the lever is brought close to the terminal base 2 with the lever 5 holding the electric wire, the electric wire is pressed before and after the press-fit groove 55 so that the electric wire is pressed into the press-contact slit 42 a of the terminal 42.

[0028]

According to the first aspect of the present invention, there is provided a housing having a plug connection base having a plug insertion port into which a modular plug is removably inserted, and a contact of the modular plug inserted into the housing through the plug insertion port. A plurality of contacts arranged in the housing so as to be in elastic contact with each other, and electric wires which are electrically connected to the respective contacts and which are arranged so as to protrude from the housing at a portion different from the plug connection stand and have an insulating coating are pressed into the slit It is equipped with a plurality of terminals consisting of press contact terminals that sandwich the core wire while cutting the insulation coating on both side edges of the press contact slit when press-fitting, and a rotating shaft that is pivotally supported by a bearing part provided in a different part of the housing from the plug connection base. To hold the multiple wires connected to each terminal in an aligned form, and cover the terminals with the wires in the insulation displacement slits. A lever that can be freely raised and lowered between an insertion position and a terminal opening position. The opposite side of the bearing portion from the plug connection base is opened to allow the rotation shaft to be attached and detached, and the lever opens the terminal. When the lever is in the position different from the rotating shaft, the lever abuts on the plug connection base and the position forms the lever as a fulcrum when the rotating shaft is removed from the bearing part. By providing a lever that can align and press the wire into the terminal that is a press contact terminal, the wire can be connected to the terminal without using another tool or jig, and the lever is detachable However, since the lever can be removed with a fulcrum at a part different from the pivotal support part of the lever, there is an advantage that the work of removing the lever becomes easy.

According to a second aspect of the present invention, in the first aspect of the present invention, a portion of the plug connection base where the lever comes into contact when the lever is in the position to open the terminal is provided in the housing from the bearing toward the plug connection base. This is an inclined surface that inclines so as to increase the distance from the surface on which the terminal is provided.This configuration allows the lever to open wider than when no inclined surface is provided. When holding the electric wire, it can be easily visually recognized whether or not the electric wire is held at a predetermined position. That is, after confirming the holding position of the electric wire with respect to the lever, the electric wire can be securely connected to the terminal.

[Brief description of the drawings]

FIG. 1 is a side view showing Embodiment 1 of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a bottom view of the above.

FIG. 5 is an exploded perspective view of an essential part of the above.

FIG. 6 is a front view showing a plug connection base used in the same.

FIG. 7 is a side view showing a plug connection base used in the same.

FIG. 8 is a vertical sectional view taken along the line XX of FIG. 6, showing the plug connection stand used in the first embodiment.

FIG. 9 is a bottom view showing the plug connection base used in the above and cut along the line YY in FIG. 6;

FIG. 10 is a side view of a main part of the above.

FIG. 11 is a sectional view of a main part of the above.

FIG. 12 is an exploded perspective view showing a conventional example.

FIG. 13 is a longitudinal sectional view of the same.

FIG. 14 is a partially broken plan view of the same.

FIG. 15 is an exploded side view of the same.

FIG. 16 is an exploded perspective view of a main part of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plug connection base 2 Terminal base 5 Lever 10 Housing 10b Inclined surface 11 Plug insertion port 33a Bearing part 41 Contact 42 Terminal 42a Pressure contact slit 50 Rotation axis

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuo Nakai 1048 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Works Co., Ltd. (72) Inventor Ken Nakamoto 1048 Kadoma Kadoma Kadoma City, Osaka Matsushita Electric Works Co., Ltd. Inside

Claims (2)

[Claims] 1. A housing having a plug connection base having a plug insertion port into which a modular plug is removably inserted, and a housing inside the housing so as to resiliently contact a contact of the modular plug inserted into the housing through the plug insertion port. When a plurality of arranged contacts and electric wires that are electrically connected to the respective contacts and are arranged in a form different from the plug connection stand and protrude from the housing and have an insulating coating are pressed into the press contact slits, both sides of the press contact slits It has a plurality of terminals consisting of pressure contact terminals that sandwich the core wire while cutting the insulation coating at the edges, and a rotating shaft that is pivotally supported by a bearing part provided in a different part of the housing from the plug connection base, and is connected to each terminal. Hold the multiple wires in an aligned form, and cover the terminals and position the terminals to press-fit the wires into the insulation displacement slits. A lever that can be raised and lowered between the open position and the open side of the bearing portion opposite to the plug connection base to allow the rotation shaft to be attached and detached. A modular jack, characterized in that the lever is formed in a shape different from the shaft at which the lever comes into contact with the plug connection base and that position serves as a fulcrum when the rotating shaft is removed from the bearing portion. 2. A portion of the plug connection base where the lever comes into contact when the lever is in the position to open the terminal increases the distance from the bearing portion to the plug connection base with the surface of the housing where the terminal is provided. 2. The modular jack according to claim 1, wherein said modular jack has an inclined surface.