JP2007042304A - Waterproof cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof cap for preventing itself from being disconnected from a nut when operating a lever switch by allowing the internal structure of the waterproof cap to have characteristics regarding the waterproof cap arranged at the lever switch for switching the operation of each kind of electrical machinery and apparatus for waterproofing. <P>SOLUTION: A projection 1c at the lower portion of the waterproof cap 1 is fitted to a recess 3a of the nut 3 arranged at a switch body and a projection 1d is provided on the inner surface of a large cylindrical section 1b in the waterproof cap 1, thus allowing stress operating to the upper portion of the waterproof cap 1 to pull the large cylindrical section 1b to an inner upper section when operating a lever 2, also to pull up the projection 1d to an inner upper section following it, to crimp the projection 1d to the outer periphery of the lever 2, to prevent the waterproof cap 1 from being disconnected from the recess 3a of the nut 3, and also to prevent operating force from being affected. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a waterproof cap disposed on a switch for switching the operation of various electrical devices, and has a feature in the internal structure of the waterproof cap, prevents the waterproof cap from being detached when the switch is operated, The present invention also relates to a waterproof cap characterized by having no effect.

Conventionally, when a waterproof function is required in a lever switch for switching the operation of various electronic devices, the lever 102 and the tip of the bushing 103 are in a state where the nut 108 and the washer 106 are attached to the bushing 103 as shown in FIG. A waterproof cap 101 that is inserted into a hole from the back side of the panel 105 and protrudes to the front side, and then integrally molded with the metal ring 107 is screwed into the bushing 103 and attached, and the nut 108 and the washer 106 are tightened. Then, the ring-shaped protrusion 104 provided on the opening end surface of the large cylindrical portion 101a of the waterproof cap 101 is pressed against and closely contacts the panel 105, so that the bushing 103 and the panel 105 are kept waterproof. However, the waterproof cap 101 formed integrally with the metal ring 107 in this way is When the waterproof cap 101 is replaced, the switch body is dropped from the panel 105 to the inside of the connected device when the waterproof cap 101 is replaced. Since it is necessary to tighten the nut 108 again from the back side of the 105, it takes a lot of trouble to replace it.
As a method for solving this, as shown in FIG. 12, a waterproof cap 112 is put on the upper surface of the lever 111, a nut 113 for attaching the waterproof cap 112 to the panel 115 is provided with a recess 113a, and the waterproof cap is provided in the recess 113a. 112 has a method in which the convex 112b provided at the lower portion is fitted to the concave and convex portions, the waterproof cap 112 is attached, and a rubber washer 114 is provided between the nut 113 and the panel 115 to maintain waterproofness. By this method, the nut 113 can be tightened from the front surface of the panel 115, and the prevention cap 112 can be easily replaced.
Japanese Utility Model Publication No. 5-48146

  However, in the method of fitting the convex portion 112b at the bottom of the waterproof cap 112 and the concave portion 113a of the nut 113 as shown in FIG. 12, the method shown in FIG. 13 (a), FIG. 13 (b), and FIG. As shown in the figure, when the lever 111 is operated, a stress is applied to the upper portion of the waterproof cap 112, the stress is applied to the large cylindrical portion 112a, and the stress is applied to the convex portion 112b of the waterproof cap 112. The cap 112 may come off. SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a waterproof cap that has a feature in the inner surface structure of the waterproof cap so that the waterproof cap is less likely to be detached from the nut when the lever is operated.

  In order to achieve the above-mentioned object, the present invention fits the convex portion of the lower portion of the waterproof cap with the concave portion of the nut disposed in the switch body, and further provides a plurality of protrusions on the inner surface of the large cylindrical portion of the waterproof cap. When the lever is operated, the stress acting above the waterproof cap pulls up the large cylindrical portion to the inner upper side, and the projection is also lifted to the inner upper side so as to follow it, and the projection is pressed against the outer periphery of the lever. The waterproof cap is prevented from being detached from the nut.

(1) A switch having a contact mechanism portion in the switch body and comprising a lever protruding from the switch body, the switch having a nut for attaching the switch to a panel, and having one end having an inner diameter substantially the same as the outer diameter of the lever. In the waterproof cap having a closed small cylindrical portion and a large cylindrical portion communicating with the small cylindrical portion, the nut and the waterproof cap are fitted into an uneven shape, and a plurality of protrusions are provided on the inner surface of the large cylindrical portion, and the lever When operating the lever, the protrusion can be pressed against the outer periphery of the lever to prevent the waterproof cap from being detached from the nut.

  The waterproof cap according to the present invention includes a small cylindrical portion having a convex portion at a lower portion of the waterproof cap fitted into a concave portion of a nut disposed on the lever switch body, and a small cylindrical portion having an inner diameter substantially the same as the outer diameter of the lever and one end closed. A plurality of protrusions are provided on the inner surface of the waterproof cap having a large cylindrical portion communicating with the cylindrical portion, and the stress acting on the upper portion of the waterproof cap when operating the lever pulls the large cylindrical portion upward and follows it. When the lever is operated, the protrusion is pressed against the outer periphery of the lever to prevent the waterproof cap from being detached from the nut and to affect the operating force. Absent.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a cross-sectional view in which a waterproof cap of the present invention is attached to a lever switch, and FIG. 2 is a view showing the waterproof cap of the present invention from the bottom.
As shown in FIG. 1, a waterproof cap 1 having a small cylindrical part 1a having one end closed from the upper surface of the lever 2 and having the same inner diameter as the outer diameter of the lever 2 and a large cylindrical part 1b communicating with the small cylindrical part 1a. A waterproof lever switch is provided, and a nut 3 for attaching the waterproof lever switch to the panel 5 is provided with a concave portion 3a, and a convex portion 1c provided at the lower portion of the waterproof cap 1 is fitted into the concave portion 3a. A rubber washer 4 is disposed between the nut 3 and the panel 5 for waterproofing. A plurality of protrusions 1d are formed on the inner surface of the large cylindrical portion 1b by integral molding, and four protrusions 1d are formed so as to surround the lever 2 as shown in FIG.

  FIG. 3 is a cross-sectional view showing a state where the lever 2 is operated by covering the lever switch with the waterproof cap 1 of the present invention. As shown in FIG. 3A, the plurality of protrusions 1d of the waterproof cap 1 remain vertically downward when the lever 2 is not operated. However, as shown in FIG. When the operation is started, a stress is applied to the upper portion of the waterproof cap 1, and the plurality of protrusions provided on the inner surface of the large cylindrical portion 1b so that the stress pulls the large cylindrical portion 1b of the waterproof cap 1 inward and upward. The stress is also applied to 1d, the protrusion 1d is pulled inward and upward, the stress applied to the convex portion 1c at the bottom of the waterproof cap 1 is reduced, and as shown in FIG. By operating, the protrusion 1 d of the waterproof cap 1 presses against the outer periphery of the lever 2 to prevent the waterproof cap 1 from being detached from the nut 3.

In order to examine the effect of the protrusion of the waterproof cap of the present invention as described above, waterproof caps of various shapes were prepared, and the pullout strength and operating force were measured.
FIG. 4 (a) shows a sample A with no protrusions and a recess 8 and FIG. 4 (b) shows a bottom view thereof. FIG. 5A shows a sample B with a small protrusion 6 and a recess 8, and FIG. 5B shows a bottom view thereof. FIG. 6A shows a sample C with a large protrusion 7 and a recess 8, and FIG. 6B shows a bottom view thereof. FIG. 7A shows a sample D with a small protrusion 6 and no recess 8, and FIG. 7B shows a bottom view thereof. A total of 12 types of these samples were prepared. The material of the waterproof cap used for this measurement is silicon rubber.
First, in order to measure the pullout strength of each sample, as shown in FIG. 8, a bit 10 is screwed into a load measuring device 9, and a screw 12 is passed from the inside to each sample having a hole 11 formed at the tip. , And screwed into the bit 10. The lever switch body is fixed by a vise (not shown). In this way, the load measuring device 9 was attached to each sample, the position of the lever 13 was neutral, the bit 10 was pulled up, and the load measuring device 9 was used for measurement. The results are shown in Table 1.

  Next, as shown in FIG. 9, the load measuring device 9 was loaded vertically upward in the state where the lever 13 was tilted, and the pullout strength of each sample was measured by the same method as described above. The results are shown in Table 2.

  From the results of Tables 1 and 2, it was found that Sample B, Sample C, and Sample D with protrusions had a higher pulling strength than Sample A without protrusions, and the difference in pulling strength depending on the size of the protrusions was not much. It did not appear clearly.

  Next, as shown in FIG. 10, an extension jig 14 is attached to the load measuring instrument 9, a bit 15 is screwed to the tip of the extension jig 14, and a lever switch with each sample attached is vise (not shown). The operating force when the lever 13 tilted from left to neutral was measured by applying a load vertically downward from above the lever switch. The results are shown in Table 3.

From Table 3, the sample B, sample C, and sample D with protrusions are slightly smaller than the sample A with no protrusions, but the average value of the operation force is slightly smaller. It wasn't.
From the above measurement results, it was confirmed that providing a plurality of protrusions on the inner surface of the large cylindrical portion of the waterproof cap has an effect of preventing the waterproof cap from being detached and does not affect the operating force of the waterproof cap. It was.

  Further, the present invention is not limited to the above-described embodiments, and various modifications can be made based on the gist of the present invention. For example, the length of the protrusion on the inner surface of the large cylindrical portion of the waterproof cap is changed by a switch to be mounted, or the number of the protrusions is changed. These contents are not excluded from the scope of the method of the present invention.

  In the present invention, when the convex portion of the lower part of the waterproof cap is unevenly fitted with the concave portion of the nut disposed on the lever switch body, and a plurality of protrusions are provided on the inner surface of the large cylindrical portion of the waterproof cap, the lever is operated. Then, the stress acting on the upper side of the waterproof cap pulls up the large cylindrical portion inward and upward, the projection is also lifted inward and upward, and the protrusion is pressed against the outer periphery of the lever when operating the lever. Thus, it is possible to provide a waterproof cap that can prevent the waterproof cap from being detached from the nut and does not affect the operating force.

It is sectional drawing which attached the waterproof cap of this invention to the lever switch. It is a bottom view of the waterproof cap of the present invention. It is sectional drawing which attached the waterproof cap of this invention to the lever switch, and showed a mode that the lever inclines. It is the waterproof cap with a recessed part without a protrusion, and its bottom view. It is a waterproof cap with a small protrusion and a recess, and its bottom view. It is a waterproof cap with a large protrusion and a recess, and its bottom view. It is a waterproof cap with a small protrusion and no recess, and its bottom view. It is the figure which showed the measuring method of the pull-out strength of the waterproof cap at the time of lever neutrality. It is the figure which showed the measuring method of the pulling-out strength of the waterproof cap at the time of lever inclination. It is the figure which showed the measuring method of the operation force when operating a lever from left to neutral. It is sectional drawing of the conventional method which used the waterproof cap integrally molded with the metal ring. It is sectional drawing of the conventional method with which the nut and the waterproof cap uneven | corrugated fitting were carried out. It is sectional drawing which showed a mode that the lever inclines by the conventional method which carried out the uneven | corrugated fitting of the nut and the waterproof cap.

Explanation of symbols

1, 101, 112 Waterproof cap 1a Small cylindrical part 1b, 101a, 112a Large cylindrical part 1c, 112b Protruding part 1d Protrusion 2, 13, 102, 111 Lever 3, 108, 113 Nut 3a, 8, 113a Concave part 4, 114 Rubber Washer 5, 105, 115 Panel 6 Small protrusion 7 Large protrusion 9 Load measuring instrument 10, 15 Bit 11 Hole 12 Screw 14 Extension jig 103 Bushing 104 Projection piece 106 Washer 107 Metal ring

Claims (1)

  A switch comprising a lever that protrudes from the switch body with a contact mechanism in the switch body, and has a nut that attaches the switch to the panel, and has a small inner diameter that is substantially the same as the outer diameter of the lever. In a waterproof cap having a cylindrical portion and a large cylindrical portion that communicates with the small cylindrical portion, the nut and the waterproof cap are engaged with each other, and a plurality of protrusions are provided on the inner surface of the large cylindrical portion, and the lever is operated. The waterproof cap is characterized in that the protrusion is pressed against the outer circumference of the lever to prevent the waterproof cap from being detached from the nut.

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