JPH0740312Y2 - Electrical connector waterproof cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a waterproof cap of an electric connector for waterproofly holding a connector that is not fitted with a mating connector by an optional setting in an automobile or the like.

[Prior Art] As a conventional waterproof cap structure of this type, for example,
There is a structure as shown in FIG. 11 and FIG. This shows a waterproof cap that can be fitted to an unused electric connector. The waterproof cap has a cap body 1 having a substantially U-shaped cross section, and the cap body 1.
In order to prevent the annular seal member 2 fitted in the inner rear portion of the cap member 1 and the seal member 2 fitted in the cap body 1 of the seal member 2 from falling off, a member fitted to the inner surface of the cap body 1 And a locking member 3 thereof.
A locking claw piece 4 for holding the locking force with the cap body 1 is integrally formed therewith. 5 is
The protrusion is provided on the inner surface of the cap body 1 to regulate the fitting position of the locking member 3.

[Problems to be Solved by the Invention] As described above, in the conventional example, the seal member 2 is fitted into the cap body 1, and the locking member 3 for preventing the seal member 2 from falling off is provided in the cap body. Since it has a structure to be fitted in 1, it requires three members, that is, the cap body 1, the seal member 2, and the locking member 3, so that each component is manufactured, the assembly work by these components, and the use of multiple components. There is a problem that the product cost is increased due to the necessity of parts management and the like.

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned conventional problems, and the purpose thereof is to reduce the number of constituent members of the waterproof cap to two, and to improve the productivity. To raise. That is, according to the present invention, the cap body is integrally provided with the locking member for fitting and holding the seal member fitted in the cap body, so that not only the number of components is reduced but also the assembling workability is improved and the product cost is reduced. An object of the present invention is to provide a waterproof cap for an electric connector that can be reduced.

[Embodiment] The present invention will be described in detail below with reference to an embodiment shown in FIGS. 1 to 9.

A is a waterproof cap, and B is a connector that is fitted and held in the waterproof cap A to be waterproof-protected. The structure of the waterproof cap A will be described below. The waterproof cap A has a tubular cap body 12 whose rear end is closed by a closing wall 11 and whose front end is open.
In the inner part of the inside of the
Further, a plurality of projecting strips 14 extending in the axial direction are circumferentially separated from each other on the inner peripheral surface of the cap main body 12 at the front side of this space. Further, a locking step portion 15 for holding the fitting of the connector B is provided on the top of the cap body 12.
Is integrally formed, and the cap body 12
A fitting attachment portion 16 provided for fixing the cap body 12 to a vehicle body (not shown) is integrally formed on the lower outer surface of the. Reference numeral 17 denotes a die-cutting hole formed by die-cutting of a die used when molding the cap body 12 with resin. Reference numeral 18 is a concave and rubber waterproof packing that is fitted into the space 13 in the cap body 12, and a protrusion 19 having a corrugated cross section is formed on the inner peripheral surface of the waterproof packing 18. The waterproof packing 18 fitted in the space 13 of the cap body 12 as described above is locked to the ends of the projecting strips 14 of the cap body 12 to prevent it from coming off. As shown in FIG. 2, the connector B is a normal male connector in which the connection terminals 21 connecting the wire harness 20 are fitted, and the upper surface of the connector B is a male connector (not shown). A locking projection 22 that is locked to the connector is formed.

The above is the configuration of the waterproof cap A and the connector B. The operation will be described next. For example, when an unused connector B occurs due to an optional setting of the vehicle, the connector B is saved without cutting and discarding. In order to do so, the waterproof cap A is fitted on the connector B. That is, when the connector B is fitted into the waterproof cap A, the tip of the connector B is fitted into the recess of the waterproof cap 18, and the protrusions 19 of the waterproof packing 18 are elastically pressed onto the outer peripheral surface of the connector B. The connector B is pressure-welded to protect the connector B from water. At this time, the locking projection 22 of the connector B is locked with the locking step portion 15 of the waterproof cap A and the fitting of the waterproof cap A is maintained.
When removing the waterproof cap A from the connector B, the pressing portion 23 of the connector B is pressed to stop the locking step portion 15 of the cap A.
It suffices to release the locking force between the locking projection 22 of the connector B and the locking projection 22.

When the waterproof packing 18 is inserted and mounted in the waterproof cap A, the waterproof packing 18 is inserted into the waterproof cap A from the opening side. This makes the waterproof packing 18
The waterproof packing (18) comes into contact with the ridge (14) and deforms in the circumferential direction, so that the waterproof packing (18) passes through the ridge (14) and is mounted in the space (13). At that time, the air inside the waterproof cap A is waterproof packing 18
Since it is pushed by and flows out from the hole 17 to the outside, the work of inserting and mounting the waterproof packing 18 into the waterproof cap A can be carried out smoothly.

As described above, the structure of the waterproof cap A according to the present embodiment is composed of two members, that is, the cap body 12 and the waterproof packing 18 fitted in the cap body 12. Compared with this, the number of parts is reduced, so that the number of assembling steps is reduced and the assembling workability is improved, so that the economical efficiency can be remarkably improved.

[Effects of the Invention] As described above, the present invention is a waterproof cap A that covers the electric connector B and prevents water from flowing into the inside thereof. One end is closed by the closing wall 11 and the other end is opened. A plurality of projecting strips extending in the axial direction on the inner wall of the cylindrical cap body 12
A space 13 is formed at intervals in the circumferential direction, and a space 13 is formed between the inner end of the projection 14 and the closing wall 11, and a waterproof packing which is covered with the electric connector B in the space 13. According to this, the cap body 12 and its cap body are provided because the waterproof cap is provided with 18 and further provided with the locking step portions 15 that engage with each other when the cap body 12 is covered with the electric connector B. Since it is composed of two members, waterproof packing 18 that fits inside 12, the number of parts is reduced compared to the conventional waterproof cap, thus reducing the number of assembly steps and improving the assembly workability. The effect is that the economic efficiency can be significantly improved.

Further, by providing the closing wall 11 with a plurality of holes 17 penetrating the closing wall 11 in the axial direction, when the waterproof packing 18 is inserted into and attached to the waterproof cap A, the air inside the waterproof cap A escapes from the hole 17. Therefore, the work of inserting and mounting the waterproof packing 18 into the waterproof cap A can be easily performed.

That is, since the inner side and the outer side of the closing wall 11 are communicated with each other through the hole 17, there is an effect that the operation of inserting the waterproof packing 18 into the waterproof cap A can be easily performed.

[Brief description of drawings]

FIG. 1 is a perspective view showing a use state of the waterproof cap according to the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG. Fig. 4 is a perspective view of only the waterproof cap, and Fig. 5 is V-V in Fig. 4.
6 is a sectional view taken along line IV-IV in FIG. 5, FIG. 7 is a front view thereof, FIG. 8 is a rear view thereof, FIG. 9 is a seating view thereof, and FIG. 10 is a conventional example. And FIG. 11 is a sectional view taken along line XI-XI in FIG. A ... Waterproof cap, B ... Connector 11 ... Closed wall, 12 ... Cap body 13 ... Vacancy, 14 ... Ridge piece 15 ... Locking step part, 16 ... Mating attachment part 17 ... Die cutting hole, 18 Waterproof packing 19 … Slits 20… Wire harness 21… Connecting terminals, 22… Locking protrusions

Claims (2)

[Scope of utility model registration request] 1. A watertight cap (A) which covers an electric connector (B) and prevents water from flowing into the inside of the electric connector (B), wherein one end is closed by a closing wall (11) and the other end is opened. A plurality of axially extending projecting strips (14) are circumferentially spaced from the inner wall of the cap body (12), and the inner end of the projection (14) and the closing wall (11) are separated from each other. A space (13) is formed between them, a waterproof packing (18) to be covered with the electric connector (B) is mounted in the space (13), and the cap body (12) is connected to the electric connector (12). A waterproof cap for an electric connector, characterized in that a locking step portion (15) is provided which is engaged with each other when covered with B). 2. The waterproof cap for an electrical connector according to claim 1, wherein the closing wall (11) has a plurality of holes (17) axially penetrating the closing wall (11).