JP3648351B2 - Waterproof cover for wiring connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waterproof cover for a wiring connector.
[0002]
[Prior art]
As an example of a waterproof cover of a conventional wiring connector, the waterproof cover in a garbage truck will be described.
FIG. 7 is a perspective view showing the garbage truck. In the figure, a switch bar 102 for urgently stopping the loading operation of the garbage is provided at the lower part of the garbage input port 101 at the rear of the garbage truck 100. A proximity switch 103 is provided in the vicinity of the switch bar 102. For example, if the worker is about to get caught in a part of the body, or if the worker notices that dangerous goods have been accidentally thrown in, the switch bar can be 102 is operated. When the switch bar 102 is operated, the proximity switch 103 detects this, and the loading operation is urgently stopped.
[0003]
The proximity switch 103 is connected to a control unit (not shown) of the loading mechanism via the connector unit 104 for convenience of replacement. FIG. 8 is a schematic cross-sectional view showing the structure of the connector portion 104. The connector part 104 is provided exposed in the vicinity of the proximity switch 103. Therefore, rain water and washing water for washing the vehicle body are applied. Therefore, as shown in FIG. 8, the wiring connector 105 and the lead wire 106 in the vicinity thereof are covered with a waterproof cover 107, and the connector portion 104 is kept in a substantially horizontal and substantially sealed state as a whole, thereby providing a simple waterproof structure. .
[0004]
[Problems to be solved by the invention]
However, in the waterproof cover of the conventional wiring connector as described above, since the inside of the waterproof cover 107 is in a substantially sealed state, condensation occurs on the inner surface of the cover that is in contact with the outside air due to a change in temperature. Further, if the state is left as it is, the humidity inside the cover further increases, and condensation occurs in the insulating portion of the wiring connector 105. When dew condensation occurs in the insulating portion, the insulation state of the wiring connector 105 is deteriorated, causing electric leakage, and as a result, the loading mechanism may malfunction.
[0005]
In view of the above-described conventional problems, an object of the present invention is to provide a waterproof cover for a wiring connector that does not cause condensation on an internal connector.
[0006]
[Means for Solving the Problems]
The waterproof cover of the wiring connector according to the present invention includes a cylindrical large-diameter portion that covers the wiring connector, and a small-diameter portion that is provided at both axial ends of the large-diameter portion and surrounds the lead wire of the wiring connector. A plurality of drain holes are formed at predetermined angular intervals in the circumferential direction at each of both axial ends of the large diameter portion, and the drain holes at one end and the water at the other end. The punched holes are formed so as to be shifted from each other in the circumferential direction by half the angle interval (claim 1) .
[0007]
According to the waterproof cover of the wiring connector configured in this way, even when the waterproof cover is mounted horizontally, even if it is mounted at an arbitrary position in the circumferential direction, any drainage hole is directly below or in the vicinity thereof. . Moreover, the water drainage hole can be made to exist at the lowest position in the large diameter portion by adjusting the position at a slight angle as necessary. Therefore, even if condensation occurs on the inner surface of the waterproof cover, it can be discharged from the drain hole. As a result, the humidity in the waterproof cover does not increase, and no condensation occurs on the wiring connector.
[0008]
In the waterproof cover (Claim 1) , the drain hole is a round hole, and a slit extending from one of them to the axial end face of the nearest small diameter portion may be formed (Claim 2 ). ).
According to the waterproof cover of the wiring connector configured in this way, since the end point inside the slit in the axial direction is a drain hole made of a round hole, the tearing stress when the slit is expanded is dispersed. The structure is more difficult to tear inward in the axial direction from the end point.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
1 is a perspective view of a state where a waterproof cover of a wiring connector according to an embodiment of the present invention is attached to the wiring connector, FIG. 2 is a sectional view of only the waterproof cover, and FIG. 3 is a sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. The waterproof cover of the wiring connector is used for, for example, an exposed wiring connector or other connection portion that may be exposed to rain water or washing water in a garbage truck.
1 and 2, a waterproof cover 1 has a cylindrical large-diameter portion 1 a for covering the wiring connector 2, and is diametrically inward from both ends in the axial direction (vertical direction in FIG. 2) of the large-diameter portion 1 a. Are further extended in the axial direction, and include small diameter portions 1b and 1c surrounding the lead wire 3 of the wiring connector 2. As shown in FIG. 1, the waterproof cover 1 is fixed to the lead wire 3 by tightening one small-diameter portion 1c with a belt 4 such as an insulok, so that the attachment position is not displaced.
[0010]
As shown in FIGS. 2 and 3, four drain holes 1d are formed at intervals of 90 degrees in the circumferential direction at one axial end of the large-diameter portion 1a (upward in FIG. 2). As shown in FIGS. 2 and 4, four drain holes 1e are formed at intervals of 90 degrees in the circumferential direction at the other axial end of the large diameter portion 1a (downward in FIG. 2). As is apparent from a comparison between FIG. 3 and FIG. 4, the drain holes 1d and 1e are arranged so as to be shifted from each other by 45 degrees in the circumferential direction. Each of the drain holes 1d and 1e is a round hole and has a shape in which the edge of the hole is slightly protruded from the outer surface. This increases the thickness of the edge of the hole and improves the strength. Therefore, the waterproof cover 1 does not easily break from the drain holes 1d and 1e.
[0011]
In FIG. 2, the slit 1g is formed from one of the drain holes 1d to the end surface 1f of the small diameter part 1b. Similarly, the slit 1j is formed from one of the other drain holes 1e to the small diameter part 1c. Is formed over the end face 1h. By opening the slit 1g or 1j, it becomes possible to insert the wiring connector 2 (FIG. 1) having an outer dimension larger than the inner diameters of the small diameter portions 1b and 1c into the large diameter portion 1a. Since the end points on the inner sides in the axial direction of the slits 1g and 1j are drain holes 1d and 1e made of round holes, the tearing stress when the slits 1g and 1j are expanded is dispersed. It has a structure that is difficult to tear inward in the axial direction. Therefore, the slits 1g and 1j provided in advance are not further split and spread by the operation of inserting the wiring connector 2.
[0012]
The waterproof cover 1 is a light milky white translucent elastic body made of, for example, PVC (polyvinyl chloride). By being translucent, the work of connecting the male and female of the wiring connector 5 within the waterproof cover 1 is facilitated. As an example of the dimensions of each part, the thickness of the waterproof cover 1 is about 1 mm, the inner diameter of the large diameter part 1a is 40 mm, the inner diameters of the small diameter parts 1b and 1c are 15 mm, the total axial length is 150 mm, and the drain holes 1d and 1e The inner diameter d1 (FIG. 2) is 4 mm, and the outer diameter d2 (FIG. 2) of the edge portion on the outer surface of the drain holes 1d and 1e is 6 mm.
[0013]
As shown in FIG. 5, the waterproof cover 1 of the wiring connector configured as described above is normally attached so that the axial direction is horizontal. In this case, the inner bottom surface 1k which is the lowermost part inside the large diameter portion 1a is substantially horizontal. On the other hand, it is attached at an arbitrary position in the circumferential direction and aligned as necessary.
As described above, the drain holes 1d and 1e are arranged at intervals of 90 degrees in the circumferential direction, and are shifted from each other by 45 degrees in the circumferential direction. Therefore, when the waterproof cover 1 is attached substantially horizontally, there is a high possibility that one of the drain holes 1d or 1e is located directly below or in the vicinity thereof. Moreover, even if it does not come directly below, the drain hole 1d or 1e always exists in the closest angle range of ± 22.5 degrees (45 degrees / 2) in the circumferential direction. Therefore, the waterproof cover 1 can be attached so that the drain hole 1d or 1e is flush with the inner bottom surface 1k only by adjusting the position at a slight angle as necessary.
When condensation occurs on the inner surface of the waterproof cover 1 attached in this manner, the water gradually hangs down and collects on the inner bottom surface 1k. Then, the water collected on the inner bottom surface 1k is discharged from at least one of the drain holes 1d or 1e. Thereby, the rise in the humidity inside the waterproof cover 1 is suppressed. Therefore, no condensation occurs on the wiring connector 2.
[0014]
If the mounting posture of the waterproof cover 1 is inclined as shown in FIG. 6, the position is adjusted in the circumferential direction so that one of the drain holes 1e is directly below. In this case, water based on condensation is concentrated near one end in the axial direction of the large-diameter portion 1a and is discharged from any one of the water drain holes 1e described above. Similarly, when inclined to the opposite side, water is discharged from the water drain hole 1d.
[0015]
In the above embodiment, the drain holes 1d and 1e are arranged so as to be shifted from each other by 45 degrees in terms of angle, but the present invention is not limited to 45 degrees. Moreover, what is necessary is just to provide two or more drain holes 1d and 1e, respectively.
Moreover, it cannot be overemphasized that the waterproof cover 1 in the said embodiment is widely applicable as a dew condensation exclusion type | mold waterproof cover with respect to not only the wiring connector in a garbage truck but the same various electrical components.
[0016]
【The invention's effect】
The present invention configured as described above has the following effects.
According to the waterproof cover of the wiring connector according to claim 1, in the case where attach the waterproof cover horizontally, even though attached to an arbitrary position in the circumferential direction, either water drainage holes just beneath or near the . Moreover, the drain hole can be made to exist at the lowest position inside the large-diameter portion only by adjusting the position at a slight angle in the circumferential direction as necessary .
[0017]
Therefore, even if condensation occurs on the inner surface of the waterproof cover, it is possible to suppress an increase in humidity inside the waterproof cover by discharging it from the drain hole. As a result, no condensation occurs on the wiring connector. In this way, it is possible to prevent malfunction of equipment connected via the wiring connector.
[0018]
According to the waterproof cover of the wiring connector of the second aspect , since the end point on the inner side in the axial direction of the slit is a drain hole made of a round hole, the tearing stress when the slit is expanded is dispersed. The structure is more difficult to tear inward in the axial direction from the end point. Therefore, it is possible to effectively prevent the slit from tearing and expanding when the wiring connector is inserted into the large diameter portion.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a waterproof cover of a wiring connector according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the waterproof cover.
3 is a cross-sectional view taken along line III-III in FIG.
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is a schematic cross-sectional view showing a state in which the waterproof cover is horizontally supported and water has accumulated therein.
FIG. 6 is a schematic cross-sectional view showing a state in which the waterproof cover is supported by being inclined and water has accumulated therein.
FIG. 7 is a perspective view showing a garbage truck using a waterproof cover of a wiring connector.
FIG. 8 is a schematic cross-sectional view showing a conventional waterproof cover for a wiring connector.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Waterproof cover 1a Large diameter part 1b, 1c Small diameter part 1d, 1e Drain hole 1f, 1h End surface 1g, 1j Slit 1k Internal bottom face 2 Wiring connector 3 Lead wire 4 Belt

Claims (2)

A cylindrical large-diameter portion covering the wiring connector;
A waterproof cover for a wiring connector provided at both axial ends of the large-diameter portion, and a small-diameter portion surrounding a lead wire of the wiring connector;
A plurality of drain holes are formed at predetermined angular intervals in the circumferential direction at each of both axial ends of the large-diameter portion, and the drain holes at one end and the drain holes at the other end are mutually circumferential. A waterproof cover for a wiring connector, wherein the waterproof cover is formed so as to be shifted in the direction by half the angle interval . 2. The waterproof cover for a wiring connector according to claim 1, wherein the drain hole is a round hole, and a slit is formed from one of them to an axial end face of the nearest small diameter portion .

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