JP4784462B2 - Waterproof structure - Google Patents

Description

  The present invention relates to a waterproof structure, and more particularly to a waterproof structure suitable for a device through which a cable is inserted.

  An example of a waterproof structure of a conventional portable electronic device will be described with reference to FIGS. 6 is an exploded perspective view showing an example of a waterproof structure of a conventional portable electronic device, FIG. 7 is a perspective view showing members constituting the waterproof structure, FIG. 8 is a side view showing an assembly process of the waterproof structure, and FIG. (A) is the fragmentary sectional view which shows the waterproofing structure, FIG.9 (b) is the elements on larger scale of Fig.9 (a).

  As shown in FIG. 6, the packing 13 is positioned and placed outside the positioning rib 11 b of the resin panel 11 on the flat portion 11 a and the U-shaped grooves 11 c and 11 c of the resin panel 11, and the resin cover 12 The screws 5, 5 that pass through the holes 12 d, 12 d (shown in FIG. 7) are screwed into the screw holes 11 d, 11 d of the resin panel 11 so that the resin cover 12 holds the packing 13. Fastened to the panel 11.

  FIG. 7A shows the resin cover 12 turned upside down. As shown in FIG. 7A, positioning ribs 12 b are provided on the inner edge of the flat surface portion 12 a of the resin cover 12. Further, ribs 12e and 12e are provided on the surfaces of the U-shaped grooves 12c and 12c.

  As shown in FIG. 7B, the packing 13 has a structure in which the plate-shaped portions 13a extend from both side end surfaces of the cylindrical-shaped portions 13b and 13c. The cylindrical portion 13b is provided with a hole 13d through which the cable 4 is inserted. The cylindrical portion 13c has no hole and is provided with a plug 13e.

  When the cable 4 shown in FIG. 6 is inserted into the hole 13d of the packing 13 and the resin cover 12 is fastened to the resin panel 11 with the packing 13 interposed therebetween as described above, the plate-shaped portion 13a of the packing 13 becomes the resin panel. 11 flat portions 11 a and the flat portion 12 a of the resin cover 12 are pressed against each other.

  Further, the plate-shaped portion 13 a of the packing 13 is compressed in the thickness direction, thereby being brought into pressure contact with the positioning rib 11 b of the resin panel 11 and the positioning rib 12 b of the resin cover 12. In this manner, the space between the flat portion 11a of the resin panel 11 and the flat portion 12a of the resin cover 12 is sealed. Further, the cylindrical portion 13b of the packing 13 is pressed against the U-shaped groove 11c of the resin panel 11 and the U-shaped groove 12c of the resin cover 12 so that the periphery of the cable 4 is sealed.

  The waterproof structure of the conventional portable electronic device can waterproof the butted portion between the resin panel and the resin cover and the insertion portion of the cable by using one packing. However, depending on the built-in state, a completely sealed state may not be obtained.

  This state will be described with reference to FIGS. FIG. 8 shows a state in which the right side of the resin cover 12 is first tightened with the screw 5. At this time, the left portions of the resin panel 11 and the resin cover 12 are opened as indicated by arrows, the right end portion of the plate-shaped portion 13a of the packing 13 is compressed, and the center line of the plate-shaped portion 13a is the right side. Is bent down. Then, the packing 13 is deformed so that the cylindrical portion 13 b is lifted by the elasticity of the packing 13.

  Next, when the left side of the resin cover 12 is tightened with a screw, the left side of the U-shaped groove 12 c of the resin cover 12 presses the cylindrical portion 13 b of the packing 13. At this time, since the right end of the plate-shaped portion 13a of the packing 13 is pressed so as not to move, the cylindrical-shaped portion 13b of the packing 13 rotates counterclockwise with respect to the plate-shaped portion 13a.

  FIG. 9A shows a state in which the plate-shaped portion 13a of the packing 13 is in pressure contact with the flat portion 12a of the resin cover 12 over the entire circumference, and FIG. 9B is a part of FIG. 9A. Is shown enlarged. As described above, when the cylindrical portion 13b of the packing 13 is tightened in a state of rotating counterclockwise with respect to the plate-shaped portion 13a, as shown in FIG. 9B, the cylindrical-shaped portion 13b and the plate-shaped portion. A dent occurs in the upper left part and the lower right part of the corner 13f with 13a. Due to this recess, the butt portion between the resin cover 12 and the resin panel 11 may not be waterproofed by the packing 13.

  In order to prevent the deformation of the packing 13 as described above, the assembling work of the resin cover 12 must be performed with great care, and there is a problem that the assembling workability deteriorates.

In the drip-proof structure disclosed in Japanese Patent Laid-Open No. 9-18169, a flat packing is used, and the flat packing is not integrally provided with a member through which a cable is inserted. Therefore, there is a problem that the number of parts and the number of assembling steps are increased because a packing for the cable is separately required at the hole portion through which the cable of the case is inserted.
Japanese Patent Laid-Open No. 9-18169, paragraphs 0009-0010, FIG.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a waterproof structure in which the number of parts is reduced, the workability of incorporation is good, and there is no risk of occurrence of poor waterproofing. It is in.

Waterproof structure of this invention is a waterproof structure in which the path Kkingu the seam of the rigid member, the packing extends on both sides in an outward direction from the cylindrical surface or conical surface around the center axis of the cylindrical portion or the conical portion The plate-shaped portion has a continuous shape, and the plate-thickness central plane of the plate-shaped portion extends in a plane direction passing through the central axis through an intersection line between a plane passing through the central axis and the cylindrical surface or the conical surface. And the U-shaped groove and the plate-shaped portion for pressing the cylindrical-shaped portion or the conical-shaped portion of the packing of the rigid member are pressed at a place where the cylindrical-shaped portion or the conical-shaped portion and the plate-shaped portion of the packing are continuous. An R-shaped portion that is positioned by biting an angle formed by the flat surface portion is provided.

  Further, in the waterproof structure, the rigid member is a panel and a cover serving as a case covering an electronic device, the cylindrical part or the conical part is a member through which a cable is inserted, and the plate-shaped part is a sheet-like packing Is.

  Moreover, in each said waterproof structure, the rib is not formed in the surface of the said U-shaped groove | channel.

  In each of the waterproof structures, the rigid member is a resin member.

  According to the waterproof structure of the present invention, the number of parts is reduced, and the built-in workability is good and there is no possibility of causing a waterproof failure.

  The best mode for carrying out the present invention will be described below with reference to examples.

  1 is an exploded perspective view showing a waterproof structure of a portable electronic device according to Embodiment 1 of the present invention, FIG. 2 is a perspective view showing members constituting the waterproof structure, and FIG. 3 is a partial sectional view showing the waterproof structure. is there.

  As shown in FIG. 2B, the waterproof structure of the portable electronic device of the first embodiment is provided with R-shaped portions 3f, 3f... At the corners where the cylindrical-shaped portions 3b, 3c of the packing 3 and the plate-shaped portion 3a are continuous. As shown in FIG. 2A, the U-shaped grooves 2c and 2c of the resinous cover 2 are not provided with ribs. Other portions have the same structure as the waterproof structure of the portable electronic device described with reference to FIGS.

  That is, as shown in FIG. 1, the packing 3 is positioned and placed outside the positioning rib 1b of the resin panel 1 on the flat portion 1a and the U-shaped grooves 1c and 1c of the resin panel 1, and is made of resin. The screws 5 and 5 that pass through the holes 2d and 2d (shown in FIG. 2) of the cover 2 are screwed into the screw holes 1d and 1d of the resin panel 1 so that the resin cover 2 presses the packing 3. Fastened to the resin panel 1.

  FIG. 2A shows the resin cover 12 turned upside down. As shown in FIG. 2A, positioning ribs 2b are provided on the inner edge of the flat portion 2a of the resin cover 2, but no ribs are provided on the surfaces of the U-shaped grooves 2c and 2c.

  As shown in FIG. 2 (b), the packing 3 has a structure in which the plate-shaped portion 3a is branched and extended from both end faces of the cylindrical-shaped portions 3b and 3c. The cylindrical portion 3b is provided with a hole 3d through which the cable 4 is inserted, and the cylindrical portion 3c has no hole and is provided with a plug 3e. As shown in FIG. 2B, R-shaped portions 3f, 3f,... Are provided at eight corners where the cylindrical portions 3b, 3c and the plate-shaped portion 3a of the packing 3 are continuous.

  When the cable 4 shown in FIG. 1 is inserted into the hole 3d of the packing 3 and the resin cover 2 is fastened to the resin panel 1 with the packing 3 interposed therebetween as described above, the plate-shaped portion 3a of the packing 3 is made of resin. The flat portion 1 a of the panel 1 and the flat portion 2 a of the resin cover 2 are pressed against each other.

  Further, the plate-shaped portion 3 a of the packing 3 is compressed in the thickness direction so as to be pressed against the positioning rib 1 b of the resin panel 1 and the positioning rib 2 b of the resin cover 2. In this way, the space between the flat portion 1a of the resin panel 1 and the flat portion 2a of the resin cover 2 is sealed. The cylindrical portion 3b of the packing 3 is pressed against the U-shaped groove 1c of the resin panel 1 and the U-shaped groove 2c of the resin cover 2 so that the periphery of the cable 4 is sealed.

  As described above, the waterproof structure of the portable electronic device according to the first embodiment can waterproof the butt portion between the resin panel and the resin cover and the insertion portion of the cable by using one packing 3. And unlike the waterproof structure of the portable electronic device demonstrated in FIG. 6 and FIG. 7, the packing 3 deform | transforms at the time of an assembly | attachment, and there is no possibility that a waterproof performance will deteriorate.

  The reason will be described below. When one side of the packing 3 is first tightened with the screw 5, the tip of one side of the plate-shaped portion 3 a of the packing 3 is pressed and fixed to the resin panel 1 and the resin cover 2. At this time, the corners formed by the flat portion 1a and the U-shaped groove 1c of the resin panel 1 on the upper and lower R-shaped portions 3f and 3f on one side of the packing 3 and the flat portion 2a and the U-shape of the resinous cover 2 are formed. The corners formed by the grooves 2 c bite into the cylindrical portions 3 b and 3 c of the packing 3 and are fixed to the resin panel 1 and the resin cover 2.

  At this time, since the tip on one side of the packing 3 is fixed to the resin panel 1 and the resin cover 2, the cylindrical portions 3b and 3c of the packing 3 are not displaced with respect to the plate-shaped portion 3a. . Since no rib is provided in the U-shaped groove 2c of the resin cover 2, the force for rotating the cylindrical portion 3b is small.

  The upper and lower R-shaped portions 3f, 3f,... On one side of the packing 3 are shaped to be fixed simultaneously with the plate-shaped portion 3a by the resin panel 1 and the resin cover 2. As shown in FIG. 3, the packing 3 is not deformed in a state where the resin cover 2 is fastened to the resin panel 1.

  As described above, in the waterproof structure of the first embodiment, the waterproof performance is not deteriorated depending on the assembled state, and the assembly process can be easily performed to obtain a good waterproof performance. Moreover, since the waterproofing of the cable insertion portion and the mating portion of the resin panel and the resin cover can be performed with a single packing, the number of parts and the number of assembly steps can be reduced.

  FIG. 4 is an exploded perspective view showing a waterproof structure according to Embodiment 2 of the present invention. In this example, the packing 7 is sandwiched from above and below by the rigid members 6 and the rigid members 6 are fastened together. However, although the upper rigid member 6 is not shown in FIG. 4, it has the same shape as the lower rigid member 6.

  The packing 7 has a shape in which the plate-shaped portions 7a and 7a extend from both side surfaces of the conical-shaped portion 7b. At the four corners formed by the conical-shaped portion 7b and the plate-shaped portions 7a and 7a, R-shaped portions 7c and 7c ... are formed.

  The rigid member 6 is formed with flat portions 6a, 6a for pressing the plate-shaped portions 7a, 7a of the packing 7 and U-shaped grooves 6b for pressing the conical-shaped portions 7b of the packing 7. When the rigid members 6 and 6 are fastened by screws (not shown), the rigid members 6 and 6 are pressed against the plate-shaped portions 7a and 7a and the conical-shaped portion 7b of the packing 7 to obtain waterproof performance.

  And since the corner | angular part of the rigid members 6 and 6 bites into the R-shaped part 7c of the packing 7 and the cone-shaped part 7b is fixed, the cone-shaped part 7b of the packing 7 rotates with respect to the plate-shaped parts 7a and 7a. The present invention can also be applied to the case of using a packing having a shape in which the plate-shaped portion extends from both side surfaces of the conical-shaped portion so that the deformation does not occur and the waterproof performance does not deteriorate.

  FIG. 5 is an exploded perspective view showing a waterproof structure according to Embodiment 3 of the present invention. In this example, the packing 9 is sandwiched between the rigid members 8, 8... And the rigid members 8, 8. The four rigid members 8, 8... Have the same shape.

  The packing 9 has a shape in which the plate-shaped portions 9a, 9a,... Extend from the upper, lower, left, and right side surfaces of the conical-shaped portion 9b. Shape portions 9c, 9c... Are formed.

  The rigid member 8 is formed with flat portions 8a, 8a,... For pressing the plate-shaped portions 9a, 9a... Of the packing 9 and 1/4 arc-shaped U-shaped grooves 8b for pressing the conical portions 9b of the packing 9. When the rigid members 8, 8... Are fastened with screws (not shown), the rigid members 8, 8... Are pressed against the plate-shaped portions 9a, 9a.

  And the corner | angular part of rigid body member 8,8 ... bites into the R-shaped part 9c of the packing 9, and the cone-shaped part 9b is fixed, Therefore The cone-shaped part 9b of the packing 9 rotates with respect to plate-shaped part 9a, 9a The present invention can be applied to the case where the number of rigid members does not deteriorate and the waterproof performance does not deteriorate, and the number of rigid members exceeds two.

It is a disassembled perspective view which shows the waterproof structure of the portable electronic device which is Example 1 of this invention. It is a perspective view which shows the member which comprises the waterproof structure. It is a fragmentary sectional view showing the waterproofing structure. It is a disassembled perspective view which shows the waterproof structure which is Example 2 of this invention. It is a disassembled perspective view which shows the waterproof structure which is Example 3 of this invention. It is a disassembled perspective view which shows the example of the waterproof structure of the conventional portable electronic device. It is a perspective view which shows the member which comprises the waterproof structure. It is a side view which shows the assembly middle of the waterproof structure. Fig.9 (a) is the fragmentary sectional view which shows the waterproof structure, FIG.9 (b) is the elements on larger scale of Fig.9 (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Resin panel, 1a plane part, 1b Positioning rib, 1c U-shaped groove 1d Screw hole 2 Resin cover, 2a Plane part, 2b Positioning rib, 2c U-shaped groove, 2d hole 3 Packing, 3a Plate-shaped part, 3b Cylinder Shape part, 3c Cylindrical part, 3d hole 3e Plug, 3f R shape part 4 Cable 5 Screw 6 Rigid member, 6a Plane part, 6b U-shaped groove 7 Packing, 7a Plate shape part, 7b Conical part, 7c R shape part 8 rigid member, 8a plane part, 8b U-shaped groove 9 packing, 9a plate-shaped part, 9b conical part, 9c R-shaped part 11 resin panel, 11a planar part, 11b positioning rib, 11c U-shaped groove 11d screw hole 12 Resin cover, 12a flat portion, 12b positioning rib, 12c U-shaped groove,
12d hole, 12e rib,
13 Packing, 13a Plate-shaped part, 13b Cylindrical-shaped part, 13c Cylindrical-shaped part,
13d hole, 13e plug, 13f corner

Claims (4)

In the waterproof structure in which the path Kkingu the seam rigid members,
The packing has a shape in which a cylindrical surface around a central axis of a cylindrical shape portion or a conical shape portion or a plate shape portion extending on both sides in the outer direction from the conical surface, and the plate thickness central surface of the plate shape portion, Extending in a plane direction passing through the central axis through an intersection line between a plane passing through the central axis and the cylindrical surface or conical surface;
A U-shaped groove for pressing the cylindrical shape portion or the conical shape portion of the packing of the rigid member and a flat surface portion for pressing the plate shape portion at a location where the cylindrical shape portion or the conical shape portion and the plate shape portion of the packing are continuous. A waterproof structure characterized by providing an R-shaped portion that is positioned by biting an angle formed between the two. 2. The waterproofing according to claim 1, wherein the rigid member is a panel and a cover serving as a case covering the electronic device, the cylindrical portion or the conical portion is a member through which a cable is inserted, and the plate-shaped portion is a sheet-like packing. Construction. The waterproof structure according to claim 1 or 2, wherein a rib is not formed on a surface of the U-shaped groove. The waterproof structure according to claim 1, wherein the rigid member is a resin member.

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