JPH0135415Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a rubber plug for a waterproof connector terminal.

"Prior Art" Generally, a terminal for a waterproof connector has a wire insertion hole 6 through it as shown in Figs. A rubber stopper 1 in which a sealing part 3 is arranged in series and annular protrusions 4A and 4B for sealing are formed on the front and rear edges of the sealing part 3.
A or 1B is used, the rubber plugs 1A and 1B are inserted into the end of the electric wire 8, and the terminal 9 is inserted into the terminal crimping part 2.
is crimped and inserted into the terminal accommodating chamber 10 of the connector 7. The structure is such that the annular protrusion 4A4B of the seal portion 3 is pressed against the inner circumferential wall of the terminal accommodating chamber 10 to prevent this. In addition, 1A in the figure is a rubber plug that has annular protrusions 4A, 4B with a circular outer shape and is inserted into a terminal receiving chamber with a circular cross section, and 1B has annular protrusions 4A, 4B with a rectangular outer shape. It is a rubber plug inserted into a terminal housing chamber having a rectangular cross section, and numeral 5 in the figure is a pressure-welding piece to the electric wire 8 provided on the inner periphery of the sealing part 3.

According to the rubber plugs 1A and 1B of the above conventional structure,
When inserting into the connector 7, the insertion force is applied unevenly and may be biased to one side of the inner wall, which causes a large frictional force with a part of the inner wall.
As shown in Figure 7, the annular protrusions 4A and 4B may lose their posture and be inserted while being tilted. tilt similarly).

Therefore, in the above insertion position, the annular protrusion 4
The pressure contact between A and 4B and the inner circumferential wall of the terminal housing chamber 10 is
Not only will it not be uniform, but also an abnormality will occur in the pressure contact between the seal portion 3 and the electric wire 8, resulting in a decrease in waterproof performance.

Therefore, in order to prevent the above deterioration in waterproof performance,
After inserting the terminal 9 into the connector 7, insert the rubber plugs 1A and 1B.
It becomes necessary to check the insertion posture of the device and correct the incorrect posture, which makes the insertion work extremely complicated.
This will significantly reduce work efficiency.

``Problems to be solved by the invention'' The invention solves the problem of deterioration in waterproof performance of the conventional rubber plugs for waterproof connectors, and
The purpose is to improve the workability of inserting a rubber plug.

``Means for Solving the Problems'' The present invention, which achieves the above objectives, has ``a terminal crimping part in the first half and a seal part bulging in a stepped shape in the second half, and the seal part has a seal. An annular protrusion is provided on the outer periphery of the terminal crimping portion.
It has a structure in which a plate-like rib is formed that gradually rises from the front edge toward the apex of the annular protrusion.

"Function" and "Example" According to the rubber stopper of the present invention having the above configuration, when the rubber stopper is inserted into the terminal accommodating chamber, even if there is a center deviation between the two, the plate-like rib can maintain the insertion guiding action. Therefore, as the rubber plug is inserted, the center deviation is gradually corrected, and the rubber plug is inserted in the correct position.

Furthermore, even when the insertion force becomes uneven as shown in Fig. 7, when the insertion force is removed, the spring action of the plate-like ribs acts to correct the rubber stopper to its normal posture. be.

Hereinafter, the present invention will be described in detail based on embodiments.

First, in FIGS. 1 to 3 showing one embodiment, the figures show a rubber plug 1B consisting of a sealing part with a rectangular outer shape to be inserted into a terminal receiving chamber with a rectangular cross section, and the front half part is The tubular terminal crimping part 2 has a sealing part 3 that bulges out with a step in the latter half and is connected to the terminal crimping part 2, and the front and rear edges of the sealing part 3 have annular protrusions 4A and 4B for sealing. are formed in parallel. The outer periphery of the terminal crimping part 2 includes the front and rear edges 2' of the terminal crimping part 2 and the front annular protrusion 4A.
between the apex 4' and the apex 4' are plate-like ribs 11A, 11B that gradually rise in an inclined manner from the front and rear edges 2' toward the apex 4'.
is formed integrally with the terminal crimp portion 2 and the seal portion 3. And plate-like ribs 11A, 11B
are located on the center line of the terminal crimping part 2 parallel to the long side of the annular protrusion 4A, in a part where there is a large level difference between the terminal crimping part 2 and the sealing part 3, and are provided in a pair of upper and lower parts. When the terminal 9 is crimped, the upper plate-shaped rib 11A is located between the crimping pieces 12 that are wrapped around the terminal crimping portion 2 from the left and right so that it does not interfere with the crimping pieces 12, and is configured to prevent interference with the crimping pieces 12. shape rib 1
1B is configured such that its front half is compressed by the crimp piece 12 and attached to the terminal 9.

Next, FIG. 4 shows another embodiment of the present invention, showing a rubber stopper 1A of the present invention that is inserted into a terminal receiving chamber having a circular cross section. Annular protrusions 4A and 4B are provided on the outer periphery of the terminal crimping portion 2, and a plate-like rib 1 having the same structure as described above is provided on the outer periphery of the terminal crimping portion 2.
1A and 11B are formed so as to be located on an extension line of the diameter of the terminal crimping portion 2.

According to the rubber plugs 1A, 1B of the present invention having the above configuration, when the rubber plugs 1A, 1B are inserted into the terminal accommodating chamber 10 of the connector 7, the center of the rubber plugs 1A, 1B and the center of the terminal accommodating chamber 10 are misaligned. Even if there is a terminal accommodating chamber 10, the inclined plate-like ribs 11A and 11B come into contact with the terminal accommodating chamber 10, and the center position is automatically adjusted. Therefore,
The rubber plugs 1A, 1B are inserted smoothly with the annular protrusions 4A, 4B uniformly contacting the inner circumferential wall of the terminal accommodating chamber 10 over the entire circumference, and the annular protrusions 4A, 4B are inserted at an angle as shown in FIG. This allows the device to be inserted in the correct posture without causing any discomfort.

Further, even if the annular protrusions 4A, 4B are forcibly inserted at an angle due to uneven insertion force, when the insertion force is removed, the plate-like ribs 11A, 11B act as a spring, and the annular protrusions 4A, 4B By correcting the posture of the seal part 3, the seal part 3 can be made to function normally.

"Effects of the Invention" As explained above, the rubber plug of the present invention can be inserted in the correct position even if it is misaligned or forcefully inserted, and the inner and outer peripheries of the sealing part 3 are connected to the electric wire 8 and the terminal. Since it can be uniformly pressed against the inner peripheral wall of the storage chamber 10 over the entire circumference, the waterproof performance of the rubber plug is stabilized and improved. Further, since the work of checking and correcting the rubber plug insertion posture at the time of insertion can be omitted, there is an effect that the work efficiency is greatly improved.

[Brief explanation of the drawing]

Fig. 1: A front view A showing a rubber stopper according to an embodiment of the present invention, and a side view B thereof, Figs. 2 and 3: A front view showing the inserted state of the rubber stopper according to the embodiment shown in Fig. 1, Fig. 4: Front view A showing a rubber stopper of another embodiment of the present invention, side view B thereof, Fig. 5: Front view A showing a rubber stopper of conventional structure, side view B thereof, Figs. 6 and 7: Conventional FIG. 6 is a front view showing a state in which the rubber stopper of the structure is inserted. Main symbols: 1A, 1B: Rubber plug, 2: Terminal crimping part, 3: Seal part, 4A, 4B: Annular protrusion, 6:
Wire insertion hole, 7: connector, 8: electric wire, 9: terminal, 10: terminal storage chamber, 11A, 11B: plate-shaped rib.

Claims (1)

[Scope of utility model registration request] The first half has a tubular terminal crimping part, and the second half has a step-shaped sealing part, and the sealing part is provided with an annular protrusion for sealing, and the outer periphery of the terminal crimping part has a front end. A rubber stopper for a waterproof connector characterized by a structure in which a plate-like rib is formed that gradually rises from the edge toward the annular protrusion.