JPH0249655Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention locks the body of the terminal housed in the housing with a lance provided in the housing, and the tail end of the terminal is covered with a cover. This invention relates to an electrical connector that is pressed and double-locked.

[Background of the idea]

Conventional electrical connectors of this type with a double locking structure include those shown in FIGS. 10 to 13. In the figure, 1 is a terminal housing, and inside this terminal housing 1, a terminal accommodating chamber 3 for fitting a terminal 2 is formed.
This terminal 2 is locked by a lance (not shown) formed in the terminal housing chamber 3. Reference numeral 4 denotes a cover that is fitted onto the end surface of the terminal housing 1 on the lead wire extraction side, that is, the terminal insertion end. A slit 5 is provided. Reference numeral 6 denotes locking pieces protruding from two opposing sides of the cover 4, and both locking pieces 6 have locking holes 7 formed therein. Reference numeral 8 denotes approximately fan-shaped elastic protrusions that are provided on both side edges of each slit 5 and protrude in correspondence with the terminal accommodating chambers 3 provided in the terminal housing 1. can be bent only in the width direction of the slit 5, and normally faces the flexible protrusion 8.
are inclined toward each other. Reference numeral 9 denotes a locking protrusion that projects from the outer surface of the terminal housing 1 and locks with the locking hole 7 of the cover 4. Reference numeral 10 denotes a rubber-made locking projection fitted onto the lead wire connection end of the terminal 2. 11 indicates a lead wire connected to the terminal 2 of the waterproof plug. 12 is a guide frame. Then, the flexible protrusion 8 of the cover 4 is engaged with the rubber waterproof plug 10 fitted to the connection part of the terminal 2 with the lead wire 11, and the terminal 2 is connected to the terminal housing 1.
This is a double locking mechanism. To engage the cover 4 with the terminal housing 1, press the cover 4 toward the terminal housing 1 so that the engagement surface of the cover 4 is parallel to the end surface of the terminal housing 1. It is desirable to lock the locking piece 6 to the locking protrusion 9 in order to prevent the tip of the protrusion 8 from gouging the waterproof plug 10. However, depending on the operator, the engagement surface of the cover 4 may be attached to the housing as shown by the two-dot chain line in FIG.
First, one end of the cover 4 is brought into contact with the housing 1 so as to be inclined with respect to the end face of the cover 4, and then the other end of the cover 4 is rotated in the direction of the arrow to lock the locking piece 6 to the protrusion 9. Sometimes. In such a locking operation, when the cover 4 and the terminal housing 1 are fitted together, the rubber waterproof plug 10 is gouged out at the edge of the protrusion 8 of the cover 4 as shown in FIG. There is a problem in that the waterproofing function of the waterproofing plug 10 is lost because the waterproofing plug 10 remains deformed.

[Purpose of invention]

The present invention has been developed by focusing on such conventional problems, and only when the fitting surface of the cover 4 is positioned parallel to the fitting end surface of the housing 1, the cover It is an object of the present invention to provide an electrical connector which can be fitted into a terminal housing 1 to prevent deformation of the waterproof plug.

[Example of idea]

The present invention will be explained in detail below based on the embodiment shown in FIGS. 1 to 9. The same parts between the structure of this embodiment and the structure shown in the conventional example will be designated by the reference numerals cited in the conventional example. The explanation of its structure will be omitted.

1' is a terminal housing, and 4' is a cover that is fitted to the end face of the terminal housing 1' on the lead wire extraction side.By fitting this cover 4' to the terminal housing 1', the terminal 2 can be connected. This is the same as the electrical connector described in the conventional example in that it can be double-locked within the terminal housing 1'. However, in this embodiment, a guide protrusion 18 parallel to the axial direction of the terminal housing 1' and both sides of the guide frame 12 are provided at the terminal insertion end of the terminal housing 1', that is, at the fitting side end surface of the cover 4'. A guide edge 12' is provided at a position such that the locking piece 6 penetrates between the guide edge 12' and the guide protrusion 18 when the cover 4' is parallel to the terminal insertion end. ing. Further, the cover 4' is provided with a guide projection 15 spaced apart from the locking piece 6 provided on the cover 4' in the same direction as the locking piece 6, and the guide projection 15 and the above-mentioned locking A gap 16 is formed between the piece 6 and the guide protrusion 18 inserted therein. Reference numeral 13 denotes an engagement frame with which the engagement claw 20 of the cover 4' engages as shown in the first figure.

Therefore, according to the structure of this embodiment, when fitting the cover 4' to the terminal housing 1', the engagement surface of the cover 4' must be positioned parallel to the end surface of the terminal housing 1', otherwise the locking will occur. Piece 6 is guide side 1
2' and the guide protrusion 18. At the same time, since the guide protrusion 18 and the interval 16 do not match (see FIGS. 8 and 9), the engagement surface of the cover 4' is inclined with respect to the end surface of the terminal housing 1'. It becomes impossible to fit the cover 4' into the terminal housing 1'. Therefore, when fitting the cover 4' to the terminal housing 1', the cover 4' is arranged parallel to and near the terminal insertion end;
While maintaining this parallel state, the cover 4 is pressed toward the terminal insertion end. This causes the locking piece 6 to move to the guide side 1.
2' and the guide protrusion 18 smoothly.

At the same time, the tip of the guide protrusion 18 is
When the cover 4' is pushed into the terminal housing 1' since it is located at the opening with the interval 16, the locking piece 6 is guided by the guide side 12' and the guide protrusion 18, and the cover 4' is pushed into the terminal housing 1'. The terminal is inserted while being maintained substantially parallel to the terminal insertion end face of terminal 1'. For this purpose, an elastic projection 8 provided on the cover 4'
As a result, the waterproof plug 10 can be pushed in without being forcibly deformed, so that an electrical connector having a waterproof effect due to the waterproof plug 10 can be provided.

[Summary of the idea]

As described above, the present invention comprises a terminal housing 1' into which the terminal 2 having the waterproof plug 10 at the rear end is inserted and accommodated, and a cover 4' attached to the terminal insertion end of the terminal housing 1'. A U-shaped locking piece 6 extends perpendicularly to the cover 4'.
A pressing protrusion 8 is provided on the waterproof plug 10, and a locking protrusion 9 is provided on the terminal insertion end.
By engaging the locking piece 6 and attaching the cover 4' to the terminal insertion end, the pressing protrusion 8 presses the waterproof plug 10 and prevents the terminal 2 from slipping out. type electrical connector, a guide member consisting of a pair of guide pieces 12', 18 for guiding the locking pieces 6 to advance along the axial direction of the terminal housing 1' is provided in a number corresponding to the number of the locking pieces 6. is provided on the terminal insertion end, and when the cover 4' is pressed and attached, both the locking pieces 6
The waterproof electrical connector is characterized in that the cover 4' is guided by the guide member so that the cover 4' is parallel to and close to the terminal insertion end.

[Effect of idea]

Therefore, the cover 4', which is fitted and attached to the end surface of the terminal housing 1', has a pair of guide pieces 12', 1
Since the fitting of the cover 4' cannot be achieved unless the fitting surface of the cover 4' and the fitting surface of the terminal housing 1' become approximately parallel to each other due to the guiding action of the guide member consisting of the guide member 8. This has the effect of providing an electrical connector in which the waterproof plug is not pried by the protrusion 8 provided on the cover 4' and the desired waterproof property is maintained.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the electrical connector according to the present invention, FIG. 2 is a partial side view thereof, and FIG.
The figure is a front view of only the terminal housing same as above, Figure 4 is a partial side view thereof, Figure 5 is a sectional view showing the locking protrusion in Figure 4, Figure 6 is a front view of only the cover, and Figure 7. 8 and 9 are illustrations of the fitting operation of the cover, Fig. 10 is a sectional view of a conventional electrical connector, Fig. 11 is a side view of only the cover, and Fig. 12 is an illustration of the cover fitting. Combination action diagram, 1st
Figure 3 is a front view of only the terminal housing. 1'...Terminal housing, 4'...Cover, 15
...Guiding protrusion, 16... Interval, 18... Guide protrusion.

Claims (1)

[Scope of utility model registration request] It consists of a terminal housing 1' into which a terminal 2 having a waterproof plug 10 at its rear end is inserted and accommodated, and a cover 4' attached to the terminal insertion end of this terminal housing 1'. A locking piece 6 extending in a U-shape and a pressing projection 8 of the waterproof plug 10 are provided, and a locking projection 9 is provided at the terminal insertion end.
By engaging the locking piece 6 with the locking projection 9 and attaching the cover 4' to the terminal insertion end, the pressing projection 8 presses the waterproof plug 10 and the terminal 2 is closed. In a waterproof electrical connector that prevents the connector from coming off, a guide member consisting of a pair of guide pieces 12' and 18 that guides the locking piece 6 to advance along the axial direction of the terminal housing 1' is attached to the locking member. A number of locking pieces 6 are provided at the terminal insertion end, and when the cover 4' is pressed and attached, both of the locking pieces 6 are guided by the guide member, so that the cover 4' is arranged parallel to and close to the terminal insertion end.