JP2595308Y2 - Connector misconnection prevention plug - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention prevents a connector from being erroneously connected by being inserted into a terminal fitting portion of a connector housing (hereinafter simply referred to as a housing) for a multi-pole connector used for connection of a wire harness in an automobile or the like. More particularly, the present invention relates to a front insert type connector misconnection prevention plug that is inserted into a terminal fitting portion from a housing coupling side (a paired connector side).

[0002]

2. Description of the Related Art FIG. 6 is a perspective view showing an example of a housing for a multipolar connector, and FIG. 7 is a sectional view showing one terminal fitting portion of the housing. The housing 6 is provided with a plurality of (four in the figure) terminal fitting portions (holes) according to the number of poles. As shown in FIG. 10, the terminals 10 (for example, female terminals) crimped to the ends of the electric wires are inserted into these terminal fitting portions. The multi-pole connector is constituted by such a housing 6 and the terminals 10. As shown in FIG. 7, the terminal fitting portion of the housing has a terminal locking portion 9 that abuts on the front end of the terminal and locks the terminal, and a protrusion protruding from the upper surface of the terminal fitting portion toward the terminal locking portion 9. A stop piece (housing lance 7) is provided. As shown in FIGS. 8 and 9, when the terminal 10 is inserted into the terminal fitting portion,
The front end of the housing pushes the housing lance 7 into the housing, enters the housing lance 7, abuts on the terminal locking portion 9, and is locked by the terminal locking portion 9. In addition, the large diameter portion of the terminal 10 comes off the housing lance 7, and the housing lance 7 engages the terminal 10. When the connector in which the terminal (for example, a female terminal) is inserted in this way is connected to a paired connector (for example, a connector in which a male terminal is inserted), the terminal fitting portion is opened via the opening 8 on the terminal locking portion 9 side. The male terminal invades the female terminal side, the male terminal and the female terminal are connected, and the electric wires connected to the male terminal and the female terminal are electrically connected to each other.

In some cases, terminals are not inserted into one or more of a plurality of terminal fitting portions provided on a housing. In this case, a plug for preventing incorrect connection is usually inserted into the terminal fitting portion where the terminal is not inserted.

FIGS. 11 and 12 are a top view and a side view showing a conventional misconnection prevention plug. Conventional misconnection prevention plug 11
A closing portion 25 for closing the end of the terminal fitting portion, a main body locking portion 24 locked to the terminal locking portion 9 of the housing to prevent the mis-connection preventing plug 11 from dropping off from the terminal fitting portion, And the distal end portion 12. This misconnection prevention plug 11
The terminal fitting portion of the housing is press-fitted from the terminal locking portion side opening 8. Then, the main body locking portion 24 is locked to the terminal locking portion 9 of the housing 6, and the misconnection prevention plug 11 is fixed to the end of the terminal fitting portion. In this manner, the misconnection prevention plug 11
Is inserted, the closing portion 25 of the mis-connection preventing plug 11 closes the opening on the terminal locking portion side of the terminal fitting portion of the housing. The terminal abuts against the misconnection prevention plug 11 if
Connector mating is prevented. This can prevent erroneous coupling of the connectors. Further, even if the terminal 10 is to be inserted into the terminal fitting portion into which the mis-connection preventing plug 11 is inserted,
Abuts against the tip 12 of the mis-connection prevention plug 11, and the terminal 1
0 cannot be locked to the housing lance 7. For this reason, it is easy to notice that the terminal 10 comes off simply by pulling the wire lightly and that the terminal 10 is erroneously inserted. Thereby, erroneous insertion of the terminal 10 can also be prevented.

[0005]

However, when the terminal 10 is erroneously inserted into the above-described conventional plug 11 for preventing misconnection, as shown in FIG. There is a problem that the terminal 10 may not be easily removed by being fitted into the housing 12 and that the terminal 10 may be erroneously recognized as being engaged with the housing lance 7. In particular, terminal 1
If the insulation barrel 13 at the rear end of the terminal 0 completely enters the housing 6, the appearance is the same as when the terminal is normally fitted, so that the fitting state of the terminal 10 is erroneously determined to be normal. It's easy to do. Further, even if the user notices that the terminal 10 has been incorrectly inserted and removes the terminal 10, the tip of the terminal 10 is deformed due to the incorrect insertion.
This terminal 10 may cause a connection failure.

[0006] Further, there is a disadvantage that the conventional misconnection prevention plug is difficult to remove once inserted into the housing. That is, when removing the conventional mis-connection prevention plug from the housing, as shown in FIG. 14, a removal jig 14 similar to a flathead screwdriver is inserted between the housing 6 and the mis-connection prevention plug 11, and By moving in the direction shown, the mis-connection preventing plug 11 is pulled out by the leverage principle. But,
Since the tip of the removal jig 14 of the mis-plug prevention plug 11 that comes into contact with the tip has a gentle slope, the removal jig 14 is slippery, and sufficient catch is not obtained, and the mis-connection prevention plug 11 is pulled out. Is difficult. Further, even if the mis-connection prevention plug 11 is pulled out, the main body locking portion 24 of the mis-connection prevention plug 11 and the terminal locking portion 9 of the housing 6 are likely to be chipped or crushed. There is a case where the fixing force is not obtained and the reliability is remarkably reduced. Further, in some cases, re-use may not be possible. Furthermore, since the misconnection prevention plug 11 can be inserted into the terminal fitting portion even if it is turned upside down, there is a drawback that play after insertion is large and foreign matter may enter through a gap.

The present invention has been made in view of such a problem, and can prevent erroneous insertion of a terminal reliably, can be easily removed from a housing, and lacks and crushes a locking portion at the time of removal. It is an object of the present invention to provide a misconnection prevention plug which can avoid the problem.

[0008]

SUMMARY OF THE INVENTION According to the present invention, there is provided a plug for preventing misconnection according to the present invention, wherein a housing lance is engaged with the terminal after being expanded by an inserted terminal, and a terminal latch for locking a front end of the terminal. Connector plug for use in a connector housing having a plurality of terminal fitting portions having a plurality of terminal fitting portions, wherein the plug is engaged with the housing lance when the terminal fitting portion is inserted from the terminal locking portion side. A lance engaging part, a main body part whose rear end part is locked to the terminal locking part, and a pulling jig provided at a part on the rear end side in the insertion direction can be locked.
And a jig engaging part of a noh .

[0009]

When the plug for preventing misconnection according to the present invention is inserted into the terminal fitting portion of the housing from the terminal locking portion side, the rear end portion of the main body portion is locked by the terminal locking portion of the housing, thereby preventing misconnection. The stopper can be prevented from falling off from the terminal fitting portion of the housing. Further, when the plug for preventing misconnection according to the present invention is inserted into the terminal fitting portion, the lance engaging portion engages with the housing lance of the housing. For this reason, even if the terminal is inserted by pushing the housing lance into the terminal fitting portion of the housing, the housing lance engages with the lance engaging portion and is hardly bent. It cannot be inserted deeply, and the insulation barrel of the terminal is exposed from the housing. Therefore, erroneous insertion can be easily detected visually. Further, in the present invention, the terminal is prevented from being inserted by engaging the housing lance, so that there is no possibility that the terminal is fitted into the misconnection prevention plug, and the deformation of the terminal can be prevented.

In the plug for preventing misconnection according to the present invention, the rear end of the main body is locked to the terminal locking portion of the housing and is fixed to the housing, but is inclined with respect to the terminal locking portion. If it is locked by the surface, the force required at the time of pulling out can be reduced, and at the time of pulling out, the rear end portion of the body portion of the misconnection prevention plug and the terminal locking portion of the housing may be chipped or crushed. Can be avoided. In addition, by providing a pull-out jig locking portion for locking the pull-out jig at a portion on the rear end side in the insertion direction, the work of pulling out the misconnection prevention plug becomes easy.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing a connector misconnection prevention plug 1 according to an embodiment of the present invention, FIG. 2 is a perspective view showing a direction in which the connector is inserted into a housing 6, and FIG. FIG. 6 is a cross-sectional view showing a state where the housing is mounted on a terminal fitting portion. The misconnection prevention plug 1 according to the present embodiment
It is used for a housing having a terminal locking portion 9 for locking the front end of the terminal, and a housing lance 7 for projecting from the inner surface of the terminal fitting portion toward the terminal locking portion 9 and engaging with the inserted terminal. . The rear part in the insertion direction of the misconnection prevention plug 1 according to the present embodiment is a closing part 5 that closes the opening 8 on the terminal locking part 9 side of the terminal fitting part. The closing portion 5 is provided with a step, and a concave portion (pulling jig locking portion) 3 for locking the punching jig is provided in this step portion. Further, a lance engaging portion 2 protrudes from a distal end portion in the insertion direction, and the lance engaging portion 2 enters between the housing lance 7 and the upper surface of the terminal fitting portion to engage the housing lance 7. It has become. Further, main body locking portions 4 that are locked to terminal locking portions 9 of the housing 6 are provided on both side portions of the misconnection prevention plug 1. The main body locking portion 4 is locked to the terminal locking portion 9 on a surface inclined with respect to the surface of the terminal locking portion 9.

When the plug for preventing misconnection 1 thus constructed is inserted into the terminal fitting portion of the housing 6 through the opening 8 on the terminal locking portion 9 side, the main body locking portion 4 is connected to the terminal locking portion 9 of the housing 6.
And the misconnection prevention plug 1 is fixed to the housing 6. Since the closing portion 5 closes the opening 8, if the terminal is mounted at the same position of the mating connector housing, the terminal comes into contact with the misconnection prevention plug 1 and the connector cannot be connected. And erroneous coupling can be prevented. Further, since the lance engaging portion 2 engages the housing lance 7, FIG.
As shown in (1), even if the terminal 10 is erroneously inserted into the terminal fitting portion, the distal end of the terminal 10 abuts against the housing lance 7 and cannot enter the terminal fitting portion of the housing any more. Therefore, since the insulation barrel 13 at the rear end of the terminal 10 is securely exposed from the housing, erroneous insertion can be easily detected visually. In addition, since the terminal 10 can be prevented from being fitted into the mis-connection prevention plug 1 and deforming the terminal end portion, the terminal 10 does not have a poor connection.

On the other hand, when the plug for preventing misconnection 1 according to the present embodiment is removed from the housing 6, as shown in FIG. 5, the distal end of the extraction jig 14 is engaged with the concave portion 3, and the end of the housing is used as a fulcrum. Move the extraction jig 14 in the direction of the arrow in the figure,
The misconnection prevention plug 1 is removed according to the leverage principle. At this time,
Although the main body locking portion 4 of the misconnection prevention plug 1 and the terminal locking portion 9 of the housing 6 are locked, since the surface of the main body locking portion 4 is inclined with respect to the terminal locking portion 9, The misconnection prevention plug 1 can be removed with a smaller force than in the first embodiment. Therefore, chipping and crushing of the main body locking portion 4 and the terminal locking portion 9 can be avoided. The engaging force between the plug 1 and the housing 6 can be adjusted by changing the angle between the surface of the main body locking portion 4 and the terminal locking portion 9 and the height of the main body locking portion 4. Can be.

The misconnection prevention plug according to the present embodiment cannot be inserted into the housing when the plug is turned upside down, but the play after the insertion can be reduced. In addition, there is an effect that foreign matter can be prevented from entering through the gap.

[0015]

As described above, in the plug for preventing misconnection according to the present invention, since the lance engaging portion engages with the housing lance, even if the terminal is erroneously inserted into the terminal fitting portion, the terminal is not inserted. Abuts against the housing lance to prevent erroneous insertion of the terminal, and there is no risk of deforming the terminal. In addition, by providing a pull-out jig locking portion that can lock the pull-out jig at the rear end side in the insertion direction, the operation of pulling out the misconnection prevention plug from the housing becomes extremely easy.
Furthermore, when the main body is locked to the terminal locking portion on a surface inclined with respect to the terminal locking portion of the housing, the force required at the time of pulling out can be reduced, and at the same time, the misconnection prevention plug is pulled down at the time of pulling out. Chipping and crushing of the terminal locking portion of the main body and the housing can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a connector misconnection prevention plug according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a direction in which a connector misconnection prevention plug according to the embodiment of the present invention is inserted into a housing.

FIG. 3 is a cross-sectional view showing a state in which the connector plug according to the embodiment of the present invention is inserted into a housing;

FIG. 4 is a cross-sectional view showing a state in which a connector mis-connection prevention plug according to an embodiment of the present invention is inserted into a housing and a terminal is erroneously inserted;

FIG. 5 is a schematic view showing a method for pulling out the connector misconnection prevention plug from the housing according to the embodiment of the present invention.

FIG. 6 is a perspective view showing a housing.

FIG. 7 is a sectional view showing one of the terminal fitting portions of the housing.

FIG. 8 is a cross-sectional view showing a state in which the terminal is being inserted into the housing.

FIG. 9 is a sectional view showing a state in which the terminal is completely inserted into the housing.

FIG. 10 is a perspective view showing a terminal.

FIG. 11 is a top view showing a conventional misconnection prevention plug.

FIG. 12 is a side view showing a conventional misconnection prevention plug.

FIG. 13 shows a state in which a conventional misconnection prevention plug is locked to a housing,
It is sectional drawing which shows the state in which the terminal was erroneously inserted.

FIG. 14 is a schematic view showing a conventional method for pulling out a misconnection prevention plug from a housing.

[Explanation of symbols]

 1, 11; connector misconnection prevention plug 2: lance engagement part 3: concave part 4, 24; body locking part 5, 25; closing part 6; housing 7; housing lance 8; opening part 9; terminal locking part 10 Terminal 12; tip 13; insulation barrel 14;

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho 58-120577 (JP, U) Japanese Utility Model Sho 51-58891 (JP, U) Japanese Utility Model Sho 54-128085 (JP, U) Japanese Utility Model Sho 62- 9375 (JP, U) Shokai 55-171987 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01R 13/56-13/72

Claims (2)

(57) [Scope of request for utility model registration] 1. A plurality of terminal fitting portions each having a housing lance that engages with the terminal after being spread by the inserted terminal, and a terminal locking portion that locks a front end of the terminal. In a connector misconnection prevention plug used in a connector housing, a lance engaging portion that engages with the housing lance when inserted into the terminal fitting portion from the terminal locking portion side; A main body portion to which the rear end portion is locked, and a removal jig provided at a portion on the rear end side in the insertion direction.
And a pull-out jig locking portion capable of locking the connector. 2. The connector plug according to claim 1, wherein the body is locked to the terminal locking portion on a surface inclined with respect to the terminal locking portion.