JPH0834467A - Waterproof housing structure - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a waterproof casing structure having a constant sealing area and stable airtightness at a fitting portion when fitting a case of a resin molded product. [Structure] The protruding portion 3a is deformed while being in close contact with the fitting surfaces 1a of the upper case 1 and the lower case 2, and the deformed portion is the step portion 6
To be housed. Therefore, both cases are fitted by the packing 3 without a gap, and the sealing surface is secured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for a housing in which a soft member is integrally molded with or incorporated in a resin molded product.

[0002]

2. Description of the Related Art FIG. 5 is a cross-sectional view showing a case fitting portion when a packing of a conventional waterproof type housing is integrally molded in a case, (a) before fitting and (b) after fitting. Indicates the state of.
6A and 6B are cross-sectional views showing the case fitting portion when the packing is provided in the case. FIG. 6A shows a state before fitting and FIG. 6B shows a state after fitting. In the figure, 1 is an upper case, 2 is a lower case, and both cases are made of resin molded products. 3 is a packing made of a soft material such as rubber, which is integrally molded with a groove portion 4 provided all around the fitting portion on the lower case 2 side, and has a protruding portion 3a protruding from the fitting surface 2a. 5 is a packing made of the same soft material as the packing 3,
It is provided only in the groove portion 4 and is not integrally molded. Moreover, 5a is a protrusion.

Next, a waterproof structure in the case where the packing is formed integrally with the case will be described with reference to FIG. When the upper case 1 and the lower case 2 are fitted by locking or screwing (both not shown) inside the case, the packing 3 is compressed by the pressing force of the fitting surface 1 a of the upper case 1, and the protruding portion 3
a is deformed in the left-right direction with respect to the cross section of the fitting surface, and the fitting surface 1a
The fitting portion is sealed by being brought into close contact with and waterproofed.

A waterproof structure in the case where the packing is provided on the case will be described with reference to FIG. In this case, the cross section of the groove portion 4 is larger than the cross section width of the packing 5. Therefore, when the upper case 1 and the lower case 2 are fitted by locking or screwing inside the case, the packing 5 is compressed by the pressing force of the fitting surface 1a of the upper case 1, and the groove 4
The protrusion 5a is also deformed by being expanded inward, and is also deformed to come into close contact with the fitting surface 1a, whereby the fitting portion is sealed and waterproofed.

[0005]

Since the conventional waterproof casing structure is configured as described above, the packing 3, which is made of a soft member, is fitted in the fitting portion between the upper case 1 and the lower case 2.
5, the case is sealed, but since the deformed portions of the projecting portion 3a of the packing 3 and the projecting portion 5a of the packing 5 have no escape when the cases are fitted, the pressing force between the cases varies depending on the location. In some cases, the amount of deformation of the protrusions 3a and 5a also varies, and the sealing is not sufficient.

In the packing 3 integrally molded in the case as shown in FIG. 5, since there is no gap between the molded part of the packing 3 and the case, the protrusion 3 is different due to the difference in rigidity of the casing.
There is a problem that the deformation amount of a is largely different, the stable case fitting and the deformation amount of the packing cannot be obtained, and a sufficient waterproof function cannot be obtained.

Further, in the packing 5 provided in the case as shown in FIG. 6, since the packing 5 is also deformed in the groove portion 4, the deformation amount of the protruding portion 5a is not stable and a sufficient waterproof function is obtained. There was a problem that I could not do it.

The present invention has been made to solve the above problems, and stabilizes the amount of deformation of the soft member during case fitting, and is a waterproof type having a sufficient waterproof function in the case fitting portion. The purpose is to obtain a housing structure.

[0009]

A waterproof structure according to the present invention includes a resin molded product integrally formed by fitting two upper and lower cases, which are vertically divided into two parts, and an upper case. , A soft member integrally formed with a fitting portion of one of the lower cases and having a protruding portion projecting from the fitting surface, and provided around the soft member in the fitting portion on the one case side, And a container for accommodating the deformed portion of the projecting portion of the soft member caused by the pressing of both cases.

Further, the fitting of the resin molded product is carried out at the peripheral end portions of the upper case and the lower case, and the soft member is integrally formed in a peripheral shape at the peripheral end portion of either one of the upper case and the lower case. A groove-shaped accommodating portion is provided around the soft member at the peripheral end portion.

Further, a notched accommodating portion is provided on the outer peripheral side or the inner peripheral side of the soft member at the peripheral edge portion of the case. Further, the cutout-shaped accommodating portion is provided on the outer peripheral side of the soft member, and when the upper case and the lower case are fitted together, the deformed portion of the projecting portion of the soft member protrudes from the cutout-shaped accommodating portion.

Further, a resin molded product integrally formed by fitting an upper case and a lower case, which are divided into two parts on the upper and lower sides, and a fitting part of one of the upper case and the lower case are dug. A groove, a soft member provided so as to protrude from the groove, and a step provided in a fitting portion of the upper case or the lower case and accommodating a deformed portion of the soft member caused by pressing by both cases at the time of fitting the both cases. And a section.

[0013]

In the waterproof casing structure according to the present invention, when the upper case and the lower case are fitted together, the projecting portion of the soft member is deformed while being brought into close contact with the case due to the pressure applied by both cases, and the deformed portion is accommodated in the accommodating portion. Then, the case is waterproofed.

The fitting is performed at the peripheral end portions of the upper case and the lower case, and a soft member is integrally formed in a peripheral shape on the peripheral end portion of either one of the cases, and the projecting portion of the soft member is pressed by pressing both cases. It deforms while closely contacting with the case, and the deformed portion is accommodated in the groove-shaped accommodating portion around the soft member, so that waterproofing is performed between both cases.

Further, when the two cases are fitted together, the projecting portion of the soft member is deformed while being in close contact with the case due to the pressing of the two cases, and this deformed portion is located on the outer peripheral side or the inner peripheral side of the soft member at the peripheral edge of the case. It is accommodated in a notched accommodating portion provided, and the case is waterproofed.

Further, when the two cases are fitted together, the deformed portion of the projecting portion of the soft member is made to protrude from the notched accommodating portion provided on the outer peripheral side of the soft member to prevent slipping when the case is held by hand. Designed with a function.

Further, when the two cases are fitted together, the soft member provided so as to protrude from the groove by the pressure applied by both cases is deformed while filling the gap with the groove, and the deformed portion protruding from the groove is accommodated in the step. , Waterproof between both cases.

[0018]

【Example】

Example 1. 1A and 1B are cross-sectional views showing a case fitting portion of a waterproof type machine housing showing an embodiment of the present invention. FIG. 1A shows a state before fitting and FIG. 1B shows a state after fitting. In the figure, the same or corresponding parts as those in the conventional example are designated by the same reference numerals. Reference numeral 4 denotes a groove portion provided on the entire circumference of the fitting portion on the lower case 2 side, and a packing 3 made of an elastic member is integrally formed on the entire circumference of the groove portion 4. Reference numeral 6 denotes a groove-like stepped portion provided around the packing 3 on the fitting surface of the lower case 2,
The accommodation part is shown.

Next, the waterproof structure will be described. First, when the upper case 1 and the lower case 2 are fitted together by locking or screwing inside the case, the packing 3 is compressed by the pressing force of the fitting surface 1a of the upper case 1 and comes into close contact with the fitting surface 1a. However, the protrusion 3a is deformed in the left-right direction with respect to the cross section of the fitting surface. Then, this deformed portion is housed in the step portion 6. Therefore, at the fitting portion, the upper case 1 and the lower case 2 are fitted together without a gap due to the close contact of the packing 3, and a constant sealing surface by the packing 3 is secured between both cases, so that a stable waterproof function is obtained.

Example 2. FIG. 2 is a sectional view showing a case fitting portion of a waterproof type machine casing showing another embodiment of the present invention.
(A) shows a state before fitting and (b) shows a state after fitting. In the figure, the same or corresponding parts as those in the conventional example and the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Reference numeral 7 denotes a stepped portion that is provided over the entire outer periphery of the packing 3 in the fitting portion on the lower case 2 side, and has a structure that is cut out in the outer direction of the lower case 2. It should be noted that this step portion 7 indicates a housing portion.

Next, the waterproof structure will be described. First, when the upper case 1 and the lower case 2 are fitted by locking or screwing inside the case, the packing 3 is compressed by the pressing force of the fitting surface 1a of the upper case 1 and is closely attached to the fitting surface 1a. The protrusion 3a is deformed to the left with respect to the cross section of the fitting surface, that is, to the outside of the lower case 2. This deformed portion is accommodated in the step portion 7. Therefore, in the fitting portion, the upper case 1 and the lower case 2 are fitted with each other without a gap due to the close contact of the packing 3, and the step portion 7 can secure a sufficient sealing surface between the two cases, so that a stable waterproof function can be obtained. can get.

In the second embodiment, since the step portion 7 is provided so as to be cut out on the outside of the fitting portion of the lower case 2, for example, the sealing surface is secured even when the thickness of the case cannot be secured sufficiently. Therefore, a stable waterproof function can be obtained. Further, in the second embodiment, the step portion 7 is provided over the entire outer circumference of the packing 3, but it may be provided over the entire inner circumference.

Example 3. FIG. 3 is a sectional view showing a case fitting portion of a waterproof type machine casing showing another embodiment of the present invention.
(A) shows a state before fitting and (b) shows a state after fitting. In the figure, parts that are the same as or correspond to those in the conventional example and the first and second embodiments are assigned the same reference numerals and explanations thereof will be omitted. 8 has a cross section of approximately L
The packing is formed in a V shape and is integrally formed over the entire circumference of the groove portion 4, and has a size that protrudes outward from the stepped portion 7 when the case is fitted. Further, the step portion 7 is provided over the entire outer circumference of the packing 8.

Next, the waterproof structure will be described. When the upper case 1 and the lower case 2 are fitted to each other, the protruding portion 8a is deformed outward of the lower case 2 while closely contacting with the fitting surface 1a as in the case of the second embodiment. This deformed portion is absorbed and accommodated in the step portion 7. Therefore, at the fitting portion, both cases are tightly sealed by the tight contact of the packing 8, and a stable waterproof function can be obtained. Further, by protruding the protruding portion 8a of the packing 8 from the step portion 7 to the outside, for example, when the case is small and can be carried by hand, the protruding portion of the packing 8 has a function of preventing slippage.

Example 4. FIG. 4 is a sectional view showing a case fitting portion of a waterproof casing showing another embodiment of the present invention. In the drawing, the same or corresponding parts as those in the conventional example and the first, second, and third embodiments are designated by the same reference numerals. Attached and description is omitted. A packing 9 is provided over the entire circumference of the groove portion 4, and the cross-sectional width of the packing 9 is larger than the cross-sectional width of the groove portion 4.
Reference numeral 10 denotes a stepped portion, which accommodates a deformed portion of the packing 9 when the upper case 1 and the lower case 2 are fitted.

Next, the waterproof structure will be described. First, the packing 9 is arranged on the groove portion 4 of the lower case 2. And
When the upper case 1 and the lower case are fitted to each other, the packing 9 is deformed while closely contacting with the fitting surface 1a of the upper case 1, the deformed portion is accommodated in the groove portion 4, and the gap with the groove portion 4 is filled. Further, the deformed portion protruding from the groove portion 4 is accommodated in the step portion 10. Therefore, in the fitting portion, both cases are sealed by the packing 9 without any gap, and a stable waterproof function can be obtained.

In the above-mentioned first to fourth embodiments, the packing is used as the elastic member, but an O-ring may be used. Further, although the step portion is provided on the lower case side, it may be provided on the upper case side.

[0028]

As described above, according to the present invention, when the upper case and the lower case are fitted to each other, the projecting portion of the soft member is deformed by the pressing of the both cases, and the deformed portion of the projecting portion is housed in the housing portion. By doing so, it is possible to obtain a waterproof casing structure in which the amount of deformation of the projecting portion of the soft member is stable, the sealing area of the fitting portions of both cases can be kept constant, and the waterproof airtight level is improved. You can

Both cases are fitted at the peripheral edge of the case, and the deformed portion of the projecting portion of the soft member is accommodated in the groove-shaped accommodating portion provided around the soft member, whereby The sealing area of the mating part can be kept constant,
In addition, it is possible to obtain a waterproof casing structure that improves the waterproof airtight level.

Further, the two cases are fitted together at the peripheral edge portion of the case, and the deformed portion of the projecting portion of the soft member is accommodated in the notch-shaped accommodating portion provided on the outer peripheral side or the inner peripheral side of the soft member. As a result, the fitting portions of both cases can be waterproofed, and a stable waterproof housing structure can be obtained even when the thickness of the cases cannot be sufficiently secured.

Further, the notched accommodating portion is provided on the outer peripheral side of the soft member, and when the two cases are fitted together, the deformed portion of the projecting portion of the soft member protrudes from the notched accommodating portion.
The housing can have a non-slip function, and there is no need to attach an anti-skid to the assembled housing again.
It is possible to obtain a waterproof casing structure capable of reducing the steps for assembling the anti-skid.

Further, when the two cases are fitted together, the soft member provided so as to protrude from the groove portion deforms while filling the gap with the groove portion, and the deformed portion protruding from the groove portion is accommodated in the step portion, whereby the soft member is Can be installed easily, and
It is possible to obtain a waterproof casing structure that can also improve the airtight level.

[Brief description of drawings]

FIG. 1 is a sectional view showing a case fitting portion according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a case fitting portion according to another embodiment of the present invention.

FIG. 3 is a sectional view showing a case fitting portion according to another embodiment of the present invention.

FIG. 4 is a sectional view showing a case fitting portion according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a conventional case fitting portion.

FIG. 6 is a cross-sectional view showing a conventional case fitting portion.

[Explanation of symbols]

 1 Upper case 1a Fitting surface 2 Lower case 3 Packing 3a Projection part 4 Groove part 6 Step part 7 Step part 8 Packing 8a Projection part 9 Packing 10 Step part

Claims (5)

[Claims] 1. A resin molded product integrally formed by fitting an upper case and a lower case, which are divided into two parts in the upper and lower parts, and a fitting part of one of the upper case and the lower case. A soft member that is integrally molded and has a protruding portion that projects from the fitting surface, and is provided around the soft member in the fitting portion on the one case side, and is pressed by the two cases when the two cases are fitted. A waterproof housing structure, comprising: a housing portion that accommodates a deformed portion of the protruding portion of the soft member that occurs. 2. The fitting of the resin molded product is performed at the peripheral end portions of the upper case and the lower case, and the soft member is circumferentially disposed at the peripheral end portion of either one of the upper case and the lower case. The waterproof casing structure according to claim 1, wherein the groove-shaped accommodating portion is provided around the soft member at the peripheral end portion. 3. The fitting of the resin molded product is performed at the peripheral end portions of the upper case and the lower case, and the soft member is circumferentially formed at the peripheral end portion of one of the upper case and the lower case. 2. The waterproof casing structure according to claim 1, wherein the housing portion is formed integrally with the outer peripheral side or the inner peripheral side of the soft member at the peripheral end portion and the cutout-shaped accommodating portion is provided. 4. The cutout-shaped accommodating portion is provided on the outer peripheral side of the soft member, and when the upper case and the lower case are fitted, the deformed portion of the projecting portion of the soft member protrudes from the cutout-shaped accommodating portion. The waterproof casing structure according to claim 3, wherein the waterproof casing structure is formed. 5. A resin molded product integrally formed by fitting an upper case and a lower case, which are vertically divided into two, and a fitting portion of one of the upper case and the lower case. The dug groove portion, the soft member that is provided so as to protrude from the groove portion, and the soft member that is provided in the fitting portion of the upper case or the lower case and that is generated by pressing by the both cases when fitting the both cases. And a stepped portion for accommodating a deformed portion of the waterproof casing structure.