GB2288494A

GB2288494A - Connector with a contact-aligning device

Info

Publication number: GB2288494A
Application number: GB9506456A
Authority: GB
Inventors: Akira Nagamine
Original assignee: Whitaker LLC
Current assignee: Whitaker LLC
Priority date: 1994-04-13
Filing date: 1995-03-29
Publication date: 1995-10-18
Anticipated expiration: 2015-03-29
Also published as: CN1115915A; JPH07282903A; KR950034911A; GB2288494B; GB9506456D0

Abstract

An electrical connector has a contact-aligning device 50 which is movable in the mating direction of the connector and locking devices 60 which are movable perpendicularly to the mating direction. The device 50 has a contact-aligning plate 52 with through-holes 52a (Figures 6 and 7) corresponding to the male contacts (not shown) and arms 54 extending from the plate towards the rear ends of the male contacts. It is movable rearwardly from a position in which it is level with the tips of the male contacts. The connector housing 40 has side walls 40a with openings 40b for the devices 60 which, when inserted in the openings 40b, can assume a temporary-locked position or a fully-locked position. In the temporary-locked position, slanted surfaces 54a, 68 on the arms 54 of the device 50 and on the locking devices 60 engage to prevent rearward movement of the device 50. When the locking devices 60 are in the fully locked position, the device 50 is free to move when engaged by a mating connector. Also, the locking devices 60 have retainers (72, Figures 9 and 11) for locking the male contacts in position to prevent their withdrawal. <IMAGE>

Description

CONNECTOR WITH A CONTACT-ALIGNING DRVICE This invention relates to connectors equipped with a contact- aligning device preventing male contacts from bending.- Conventional connectors, as disclosed in Japanese Patent Publication 92-209479, are equipped with a contact-aligning device preventing male contacts arranged inside the connector housing from bending as shown in Figs. 12-15.

As seen in Figs. 12-15, the housing 12 of the female connector 10 has a number of male contacts 14. Tips 14a of these male contacts 14 pass via through-holes formed in a guide 16. Tips 16b of arms 16a of the guide 16 engage with lugs 12a made in the housing 12, thus preventing the guide 16 from being pulled out of the connector, and when the tips 16b are engaged with lugs 12b, the guide is secured temporarily. As shown in Fig. 15, at the initial stage of joining the female connector 10 with the male connector 20, the tips 16b of the guide 16 are pushed by the lug 20a formed on the male connector 20. When the male connector 20 is inserted further, the lug 20a snaps over the tip 16b. With a further advance of the male connector 20, the front end of the male connector 20 comes against the plate section 16c of the guide 16 and starts to push it inside. As a result, the tip 16b disengages from the lug 12b and the guide 16 moves toward the back ends of the male contacts 14. This accomplishes the joining of the female connector 10 and the male connector 20. In addition, the female connector 10 is equipped with a locking device 18 which fits on the housing 12 and locks the male contacts 14 in place.

From the above description, it follows that male contacts 14 are prevented from being bent due to the fact that their tips are inserted in the through-holes of the guide 16. When the female connector 10 and the male connector 20 are joined together, the guide 16 is pushed by the male connector 20 and it is moved to the back ends of the male contacts 14, but if the male connector is not inserted, the guide 16 is prevented from becoming loose by the engagement of the tips 16b with the lugs 12a in the housing 12. The engagement of the tips 16b with the lugs 12b provides for temporarily preventing the guide 16 from being moved back as a result of careless handling during transportation.

However, there is a danger that the guide can be moved to the back ends of the male contacts as a result of an accidental contact with a tool, another small connector or a bunch of wires in the harness assembly shop, and the device will not be able to perform its function of protecting male contacts from being bent. Another problem is that the guide is located in the cavity of the female connector, and when it is pushed to the back ends of the male contacts, it is very difficult to pull it back to its original position.

It is therefore the purpose of the present invention to prevent deformation of male contacts by offering a connector equipped with a contact-aligning device which is generally fail-safe with regard to undesirable movements of the contact-aligning device resulting from careless handling.

In order to achieve the purpose according to this invention, the contact-aligning device is reliably secured in a temporary- locked position by locking devices, which engage arms of the contact-aligning device to retain it in such a position, so that tips of the male contacts are inside through-holes of the contact-aligning device until the connector is joined with a mating connector. This makes it possible to prevent the contact-aligning device from being moved as a result of careless handling at the harness assembly shop or other locations. At the time of connection with another connector, the locking devices are shifted to the fully-locked position, thus allowing the contact-aligning device to move towards the rear end of the male contacts. As a result, the contact-aligning device is moved by the mating connector, thus making it possible to accomplish the joining of the connectors without bending the male contacts. When the locking devices are in the fully-locked position, they lock the male contacts in position to prevent their withdrawal.

An embodiment of the invention will now be described by way of example with reference to the accompanying drawings, in which: Fig. 1 is a partially sectioned view of a connector having a contact-aligning device in position where it is even with the tips of male contacts Fig. 2 is a view similar to Fig. 1 showing the contact-aligning device when an external force is applied to the device pushing it to the back of the connector.

Fig. 3 is a view similar to Figs. 1 and 2 showing the contact-aligning device when the connector is in a fullyconnected position with a mating connector.

Fig. 4 is a side view of the contact-aligning device.

Fig. 5 is a top view of the contact-aligning device.

Fig. 6 is a front view of the contact-aligning device.

Fig. 7 is a rear view of the contact-aligning device.

Fig. 8 is a cross-sectional view taken along 8-8 in Fig. 6.

Fig. 9 is a front view of a locking device.

Fig. 10 is a side view of the locking device.

Fig. 11 is a back view of the locking device.

Fig. 12 is an exploded perspective view of a conventional female connector and a male connector before their joining.

Fig. 13 is a longitudinal cross-sectional view of the conventional female connector.

Fig. 14 is an enlarged partial cross-sectional view of the conventional female connector before connection with the male connector.

Fig. 15 is an enlarged partial cross-sectional view of the conventional female connector in the process of connection with the male connector.

Fig. 1 shows a connector 30 that comprises a female housing 40 having male contacts (not shown) arranged in it, a contact-aligning device 50 situated inside the female housing 40, and locking devices 60 which are inserted through locking device insertion openings 40b in the walls 40a of the female housing 40. The contact-aligning device 50 is provided to prevent male contacts from bending and it has a contact-aligning plate 52 in which a number of through-holes 52a correspond to the number of male contacts used in the connector, as also seen in Figs. 6-7. Four arms 54, with one at each corner of the contact-aligning plate 52, are provided which extend in the direction toward the back end of the male contacts.

The purpose of the locking devices 60 is to lock the male contacts and engage the arms 54. They are inserted through the openings 40b provided in both walls 40a and have a number of through-holes that correspond to the through-holes of the contact-aligning device 50. The locking devices can move from a temporary-locked position (Fig. 1), where their lugs 62, 64 (Figs. 10-11) are engaged with lugs provided on the female housing 40 (not shown) to a fully-locked position (Fig. 3) where lugs 62 snap over the lugs provided on the female housing 40 (not shown). The locking devices 60 can be removed from the female housing 40 by prying them out with a tool inserted in indentations 66 (Fig.10) The characteristic feature of the connector with a contact-aligning device according to this invention is that the contact-aligning device 50 is reliably protected from movement resulting from careless handling due to the engagement of the contact-aligning device 50 and the locking devices 60. When the locking devices 60 are in the temporary-locked position, indentations 54a of the arms 54 (Fig. 1) of the contact-aligning device 50 snap into indentations 68 of the locking devices 60 and reliably prevent the contact-aligning device 50 from being moved toward the back ends of the male contacts. When the locking devices 60 are in the fully-locked position (Fig.

3), the contact-aligning device 50 can be moved in the direction of the back ends of the male contacts because the arms 54 can pass through grooves 70 of the locking devices 60 and the male contacts are locked in place to prevent their withdrawal.

On wall 44 and its opposing wall of female housing 40 are protrusions 46 which provide surfaces 46a.

Protrusions 46 engage with a corresponding pair of L-shaped legs 56 formed on the contact-aligning device 50 which have surfaces 56a (Fig. 1). This engagement of surfaces 46a and 56a prevents the contact-aligning device 50 from moving towards the back ends of the male contacts (not shown) as a result of vibration or other action.

Protrusions 48 on the bottom wall 44 and its opposing wall of the female housing 40 engage corresponding locking legs 58 formed on the contact-aligning device 50 and prevent the contact-aligning device 50 from falling out of the female housing 40. In addition, there are protrusions 49 on the bottom wall 44 and its opposing wall of the female housing 40 which have two slanted surfaces running down from its center.

When a mating connector (not shown) is inserted in the female housing 40, the protrusions 49 engage their corresponding locking leg 58 and temporarily prevent the contact-aligning device 50 from moving until the housing of the mating connector engages the base surface 50a of the contact-aligning device 50. This prevents the male contacts (not shown) inside the female housing 40 from initially engaging with the female contacts (not shown) in the housing of the mating connector until they are completely aligned. Grooves 44a in the bottom wall 44 and its opposing wall of the female housing 40 are intended for the removal of the contact-aligning device 50 from the female housing 40 using a screwdriver or a similar tool.

On the housing of the mating connector, a wedge-shaped protrusion is located for each corresponding pair of L-shaped legs 56 which enters in the gap between the L-shaped legs 56, thus releasing the engagement of the protrusions 46 and the L-shaped legs 56. This wedgeshaped protrusion at the same time engages the L-shaped legs 56 and stays engaged allowing the contact-aligning device to be pull back to the position that is even with the tips of the male contacts when the mating connectors are disconnected.

The condition depicted in Fig. 1 corresponds to the situation when the locking devices 60 are in the temporary-locked position in the female housing 40, the tips of the male contacts are in the through-holes 52a of the contact-aligning device 50 and no mating connector housing is inserted in the female housing 40. In this condition, the surfaces 46a of the protrusion 46 of the female housing 40 are in contact with the surfaces 56a of the L-shaped legs of the contact-aligning device 50, thus preventing undesirable movement of the contact-aligning device 50 toward the back ends of the male contacts.

Since the tips of the male contacts are inside throughholes 52a of the contact-aligning device 50, they are safely protected from being bent by an external force or other interference.

The condition shown in Fig. 2 corresponds to the situation when pressure is applied against the contact-aligning device 50 and it comes in contact with the locking devices 60. In harness assembly shops, there is a constant danger that the contact-aligning device 50 will be strongly pushed inside by a tool, another small connector or by a bunch of wires. When the contact-aligning device 50 is strongly pushed, the L-shaped legs 56 snap over the protrusion 46 and the device starts to move toward the back ends of the male contacts and can not protect the male contacts from bending. However, when the locking devices 60 are in the temporary-locked position in the connector 30 with a contact-arraying device (Fig. 2), indentations 68 of the locking devices 60 snap into indentations 54a of the arms 54 of the contact-aligning device 50 and securely block the movement of the contact-aligning device 50 toward the back ends of the male contacts. This makes it possible to prevent undesirable movement of the contact-aligning device in the harness assembly shops even when it is strongly pushed, thus avoiding the bending of contacts.

The condition depicted in the Fig. 3 corresponds to the situation when the locking devices 60 are in a fullylocked position. In this position, male contacts are engaged by contact retainers 72 (Fig. 7) and prevent withdrawal of the contacts. In addition, since the arms 54 now can pass through the grooves 70 of the locking devices 60, the contact-aligning device 50 can be moved to the back ends of the male contacts under pressure from a mating connector. In this position, since the locking devices 60 are blocked from removal by the arms 54, they are secured from falling out after the connector is joined with the mating connector.

In the embodiment described above, the indentations 54a of the arms 54 and the indentations 68 of the locking devices 60 have slanted sides, however they may be made straight in the direction perpendicular to the direction of the joining of the connectors.

As follows from the above explanations, the contact-aligning device of the connector according to this invention is reliably protected from being moved toward the back ends of the male contacts when the locking devices are in the temporary-locked position due to the fact that the locking devices are in contact with the arms of the contact-aligning device.

Claims

1. A connector comprising a housing for receiving male contacts which extend in the mating direction of said connector, a contact-aligning device in said housing having a contact-aligning plate with through-holes through which contact sections of the male contacts extend and movable towards the rear ends of the contact sections when pushed by the mating housing of a mating connector, and a locking device, for preventing movement of the contact-aligning device, insertable through an opening in a side wall of the housing of the connector, said contact-aligning device having at least one arm extending from the contact-aligning plate and engageable with the locking device, said housing having a protrusion formed on an inner wall thereof at a position in front of the male contact sections, said contact-aligning device having at least one resilient member extending in the mating direction and including hook means engaging said protrusion to resist movement of said contact-aligning device towards the rear ends of the male contact sections, and said at least one resilient member being engageable by a protrusion on the mating housing in response to pushing of said hook means free of said first mentioned protrusion during mating of the housings and thereby permitting said contact-aligning device to move towards the rear ends of the male contact sections.

2. A connector as claimed in claim 1, wherein the locking device is located at a temporary-locked position that prevents movement of the contact-aligning device towards the rear ends of the male contact sections by the engagement of the locking device and said at least one arm, and wherein the locking device is movable to a fully-locked position which disengages the locking device and said at least one arm and allows the contact-aligning device to move towards the rear ends of the male contact sections.

3. A connector as claimed in claim 2, wherein the locking device has other through-holes which corresppnd to said through-holes of the contact-aligning plate and which are adapted to lock the male contacts in position when said locking device is in the fully-locked position.

4. A connector as claimed in claim 3, wherein each of said other through-holes has a retainer type protrusion which retains the associated male contact in position.

5. A connector as claimed in claim 2, 3 or 4, wherein the locking device and housing have lugs which engage each other to prevent the locking device from being accidentally removed from the housing or pushed into the fully-locked position while in the temporary-locked position.

6. A connector as claimed in any one of the preceding claims, wherein the locking device has a removal means which aids in the removal of the locking device from the opening.

7. A connector as claimed in any one of the preceding claims, wherein another such locking device is insertable in another opening in an opposing sidewall of the housing.

8. A connector as claimed in any one of the preceding claims, wherein a restraining protrusion is located on the inner wall of the housing and cooperates with a locking leg on the contact-aligning device, whereby said restraining protrusion restrains said locking leg and thereby said contact-aligning device from moving towards the rear ends of the male contacts.

9; A connector as claimed in claim 8, including a stop-type protrusion located on the inner wall and engageable with said locking leg to prevent removal of the contact-aligning device from the housing.

10. A connector as claimed in claim 9, wherein a groove is located in the inner wall and enables lifting of the locking leg over the stop-type protrusion by use of a tool and removal of the contact-aligning device.

11. A connector constructed, arranged and adapted to operate substantially as hereinbefore described with reference to the Figures 1 to 11 of the accompanying drawings.