JPH03751B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a plug-in connection device that serves as a relay for power supply from a drawer-type control unit housed in a control center or the like to a load.

[Conventional technology]

A conventional plug-in connection device of this type has a pair of contact legs into which the blade of the fixed terminal block is inserted, and a contactor to which a wire for connecting to equipment is connected is swung and rotated into an insulating case. It is housed and held in a freely movable so-called floating state, so that slight misalignment between the contact and the blade can be absorbed to prevent poor contact between the contact and the blade.

Further, the contactor is covered with an insulating case up to its tip to prevent it from being damaged due to external force being accidentally applied during assembly or during maintenance and inspection.

[Problem that the invention seeks to solve]

In the conventional plug-in connection device as described above, since the wire and the contact are screwed together, crimp terminals and tightening screws are required for connecting the wire, which increases the number of parts, making assembly complicated and increasing costs. In addition, since the insulating case does not have holes for passing through the tightening screws with a sufficient insulation distance, there is a problem in that the overall size of the device increases.

In addition, in conventional plug-in connection devices with low current ratings, the electric wire is connected directly to the contact by crimping, making it compact. However, on the other hand, the contact is floating inside the insulating case. Since they were not held, there was a problem in that even the slightest misalignment between the contact and the blade could not be absorbed.

Furthermore, when the contact is inclined to either side to the maximum of the floating range before being plugged into the blade, the tip of the contact leg on the opposite side to the above-mentioned inclined side and the inner wall of the insulating case There was a gap in between.

If the plug-in connection device and the blade are inserted with a misalignment on the side opposite to the above-mentioned inclined side, the blade may deviate and enter into the above-mentioned space, causing damage to the contactor and the insulating case. It was hot.

This invention was made to solve these problems, and it is possible to reduce the number of parts, facilitate assembly, and downsize the overall structure, and maintain the contact in a floating state within the insulating case.
To obtain a highly reliable insertion connection device that does not cause any trouble in inserting a blade even if a contactor is tilted to the maximum of a floating range.

[Means for solving problems]

The plug-in connection device according to the present invention has a configuration in which an insulating case is divided into two parts, which are removably connected and combined, a groove for storing a contact is formed in the insulating case, and a groove is formed at the bottom of these grooves. The above-mentioned locking protrusion for holding the contact is provided, and the contact to which the electric wire is directly connected is fitted into the locking protrusion in a floating state and held.

Further, a plug-in connection device according to another aspect of the present invention has a pair of slots formed at the end of the insulating case on the blade insertion side, and the contact is always kept in the slot even if the contact is tilted to the maximum extent. The introduction part is loosely fitted into the slot so that the leading end introduction part is positioned.

[Effect]

In this invention, a contactor to which an electric wire is directly connected is locked in a floating state by a locking protrusion provided in an insulating case that is divided into two parts.

In addition, in another aspect of the present invention, the introduction part of the contact is loosely fitted into the slot of the insulating case, so even if the contact is tilted to the maximum extent, there is no problem in inserting the blade. .

〔Example〕

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

Fig. 1 is a partially cutaway plan view of the upper insulating case of a plug-in connection device according to an embodiment of the present invention, Fig. 2 is a left side view of Fig. 1, and Fig. 3 is a portion of Fig. 1. 4 is a plan view of one-sided insulating case, FIG. 5 is a left side view of FIG. 4, FIG. 6 is a sectional view taken along the - line in FIG. It is an operation explanatory diagram.

In the figure, reference numeral 100 denotes a plug-in connection device according to the present invention, which is provided with a symmetrical insulating case 1, which is divided into upper and lower halves. 4 is a contact housed in the upper insulating case 1, 1; 5 is the contact 4 mentioned above;
This is an electric wire that is directly connected in advance by crimping or welding.

The insulating cases 1, 1 have a plurality of grooves 11, 12, 13 in which the contacts 4 are individually accommodated, as detailed configurations are shown in FIGS. 4 and 5. The grooves 11 to 13 are formed into a substantially U-shaped cross section. 14 and 15 are each of the above groove portions 11 to 14;
The first and second partition walls are respectively located between the 13 walls. 16 is a first side barrier formed on the outer side surface of the groove 11; 17 and 18 are interphase barriers formed on both sides of the first partition wall 14; and 19 is a second side barrier formed on the outer side surface of the groove 13. The end of the side barrier is sloped so as to fit in an offset state with an engaging rib 20 formed on the outer side of the first side barrier 16. Reference numeral 21 denotes two mounting holes provided in each of the first and second partition walls 14 and 15. A cylindrical projection 22 is formed around the mounting hole 21 on the second partition wall 15 side, and a counterbore 23 for receiving the cylindrical projection 22 is provided inside the mounting hole 21 on the first partition wall 14 side. ing. Reference numeral 24 denotes an interphase slot formed on the insertion side at the center of the first and second partition walls 14 and 15, and is provided to receive an interphase barrier of a fixed side terminal block (not shown). 25 is the first and second
This is an interphase groove provided in the partition walls 14 and 15 to save material. Reference numeral 26 denotes a mounting seat integrally provided on the outer opening side of the mounting hole 21. Each groove 11-1
3, there is a contact 4 located approximately in the center thereof.
A locking protrusion 30 for holding the wire in a floating state and a wire holding portion 31 located at the end on the wire introduction side are integrally provided. A sharp protrusion 32 having a substantially triangular cross section is integrally formed on the wire holding portion 31 for compressing the wire sheathing.
Further, at the tip of each of the grooves 11 to 13 on the insertion side, there is a slot 33 for introducing the contact leg portion 44 of the contactor 4.
, a limiting protrusion 34 for regulating the floating range of the contactor 4, and a slope 35 are integrally molded. One side of the groove 12 is the interphase barrier 1
8, and the groove portion 13 is configured to receive an interphase barrier 17 and a first side barrier 16, respectively.

In the above, the unevenness of the insulating case 1 is formed symmetrically with respect to the center line of the intermediate groove 12, so that the pair of insulating cases 1, 1 can be fitted facing each other. On the other hand, the contactor 4 includes a crimping part 41 that connects the electric wire 5, an intermediate abdomen 42 formed in a U-shaped cross section continuous to the crimping part 41, and a pair of crimping parts 41 that extend from the intermediate abdomen 42 at an angle in a relative direction. Contact leg 4
4, 44, a pair of introduction portions 45, 45 extending outward from the tips of these contact legs 44, and extension introduction portions 46, 46 extending from these introduction portions 45 to become narrower as shown in FIG. It consists of
A pair of locking holes 43 for loosely fitting into the locking protrusions 30 of the insulating case 1 are bored at vertically opposing positions in the intermediate abdomen 42 .

Next, the assembly of the plug-in connection device will be explained. Respective locking protrusions 3 of insulating cases 1, 1
The insulating cases 1 and 1 are assembled together so that the locking holes 43 of the contacts 4 are loosely fitted into the contacts 0 and 30. At this time, as shown in FIG. 2, the barriers 16, 17, 18, and 19 are fitted in a zigzag pattern to ensure a sufficient creepage insulation distance. Further, the cylindrical projection 22 and the counterbore 23 also fit into each other, ensuring a creepage insulation distance for a mounting screw (not shown) passing through the mounting hole 21. Inside the combined insulating cases 1, 1, three rectangular parallelepiped storage chambers 111, three blade insertion holes 112, and three electric wire extraction holes 113 are formed side by side, as shown in FIG. The contact 4 is housed in the storage chamber 111 with gaps between it and the inner wall thereof on the upper, lower, left and right sides. The contact 4 in this state is prevented from moving in the front-rear direction because the locking hole 43 is loosely fitted into the locking protrusion 30, and can be tilted and rotated within a predetermined range about the locking protrusion 30 as a fulcrum. It is held in a freely floating state. In this case, the floating range of the contact 4 is determined by the inner wall surface of the slot 33 and the slope 35.

Next, the operation of the plug-in connection device 100 assembled as described above will be explained based on FIG. 7. 7th
The figure shows a state in which the relative position between the plug-in connection device 100 and the blade 6 is deviated from the normal position by a dimension D1, and the contact 4 is tilted to the maximum of the above-mentioned floating range. In this state, the upper extended introduction portion 46 extending into the tip slot 33 of the insulating case 1 comes into contact with the slope 35 and the floating range is restricted. At the same time, the lower extension introduction part 46 overlaps the restriction projection 34 by a dimension D2, and the blade insertion hole 112 formed in the upper and lower restriction projection 34 always overlaps the pair of extension introduction parts 4.
It is blocked by 6,46. Therefore, the seventh
As shown in the figure, even if the blade 6 is inserted with the contact 4 shifted upward to the maximum extent and the blade 6 is shifted downward to the maximum, the blade 6 will enter the extension introduction part 46 and the contact 4 will move downward. pulled back. In this way, the blade 6 is prevented from entering between the introduction part 45 of the contactor 4 and the inner wall of the storage chamber 111, causing poor contact or deformation of the contactor 4.

Furthermore, the blade insertion hole 112 has the limiting protrusion 3
4, the blade 6 is narrowed within the tiltable range of the contactor 4, causing an abnormal positional shift.
The contactor 4 is prevented from being damaged by the intrusion of the contactor 4. Further, since the electric wire 5 crimped and connected to the contactor 4 has a thin core wire 51 as shown in FIGS. 6 and 7, it flexibly deforms in accordance with the movement of the contactor 4. The insulating cases 1, 1, which house the contacts 4 and are fitted together, are mounted and fixed to the case side plate of the control unit by means of mounting screws passing through the mounting holes 21, and at the same time, the insulating cases 1, 1 are
They are also fixed to each other. In addition, if necessary, it can be disassembled very easily, and the contacts can be inspected and replaced without using any special tools.

〔Effect of the invention〕

As described above, according to the present invention, since the electric wire is directly connected to the contact, the entire structure can be made compact, and the contact is held in a floating state within the insulating case with few exposed parts. Because there are
A highly reliable plug-in connection device is obtained.

Furthermore, since the insulating case is divided into two parts and the contact can be locked only by the locking protrusions protruding from the inner wall thereof, an inexpensive plug-in connection device with a small number of parts and easy assembly can be obtained.

According to another aspect of the present invention, since the introduction part of the contact is loosely fitted into the slot of the insulating case, the blade is not inserted into the pair of contact legs of the contact and reaches the tip of the contact. It is possible to obtain a highly reliable plug-in connection device in which it is possible to prevent the contacts from being deviated from being inserted between the inner wall of the insulating case covering the insulating case and the outside of the tips of the contacts, and in which the contacts are floatingly locked.

[Brief explanation of drawings]

Figure 1 is a plan view with part of the upper insulation case removed, Figure 2 is a left side view of Figure 1, Figure 3 is a partial right side view of Figure 1, and Figure 4 is one side insulation. 5 is a left side view of FIG. 4, FIG. 6 is a sectional view taken along the line -- of FIG. 1, and FIG. 7 is an explanatory diagram of the operation of FIG. 6. DESCRIPTION OF SYMBOLS 1... Insulating case, 4... Contact, 5... Electric wire, 6... Blade, 11, 12, 13... Groove, 19... Second barrier, 20... Engaging rib,
30... Locking protrusion, 31... Wire holding part, 33...
... slot, 43 ... locking hole, 44 ... contact leg section, 46 ... extension introduction section, 100 ... plug-in connection device, 111 ... storage chamber. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. A plug-in connection device comprising a contact having a pair of contact legs into which a blade is inserted and to which an electric wire is connected, and an insulating case housing the contact; The case is divided into two parts so that they can be removably combined, and each divided insulating case has a groove that forms a storage chamber for the contact when they are combined, and a contact holding engagement that protrudes from the bottom of this groove. A plug-in connection device comprising: a locking protrusion; the contact is held in a floating state within the storage chamber by loosely fitting a locking hole provided in the middle of the contact into the locking protrusion. 2. A plug-in connection according to claim 1, characterized in that each of the divided insulating cases is integrally molded with a wire holding portion that clamps the wire at the rear end side of the contact when combined. Device. 3. A plurality of grooves of the divided insulating case are arranged in parallel, and a barrier and an engagement rib that fit in a zigzag shape when combined are formed on the side surface of the groove, and the groove includes the barrier and the engagement rib. 2. The plug-in connection device according to claim 1, wherein the unevenness is formed line-symmetrically, and the divided insulating cases are the same. 4. In a plug-in connection device comprising a contact having a pair of contact legs into which a blade is inserted and to which an electric wire is connected, and an insulating case that covers this contact, a locking protrusion in the insulating case is provided. Therefore, the contactor is held in a floating state, and the pair of contact legs are bent and expanded outward in the respective extension directions to introduce the blade,
A pair of slots are formed at the end of the blade insertion side of the insulating case, and a pair of slots are provided in these slots to prevent the extension lead-in portions of each of the contact legs from falling out of the respective slots when the contact swings. A plug-in connection device characterized by being fitted.