JP2011077099A - Waterproof structure of electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure that improves waterproof performance of electronic equipment. <P>SOLUTION: The electronic equipment is characterized in that a lid 3 is provided with a gasket holding groove 20 for holding a gasket 25 with an inner peripheral surrounding wall 18 and an outer peripheral surrounding wall 19. The gasket 25 is formed in a channel-sectioned shape by both side parts 26, 27 and a coupling part 28 coupling them together, and the side parts 26, 27 are in contact with the inner peripheral surrounding wall 18 and outer peripheral surrounding wall 19, respectively. A pressed groove 29 of the gasket 25 is pressed into the side of a bottom part 20a of the gasket holding groove 20 with a tip part 8a of a waterproof surrounding wall 8 provided in a case to which the lid 3 is coupled. The side part 26 of the gasket 25 elastically deforms as shown by an arrow A to cause a side face 26b to come in tight contact with the inner peripheral surrounding wall 18, and the side part 27 elastically deforms as shown by an arrow B to cause a side face 27b to come in tight contact with the outer peripheral surrounding wall 19. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a waterproof structure for an electronic device in which a packing is pushed into a packing housing groove by a waterproof enclosure surrounding the waterproof space.

  As a waterproof structure of a conventional electronic device, a case in which a packing receiving groove is provided over the entire periphery of the opening end surface and a bottom plate that covers the opening of the case and has ribs over the entire periphery of the peripheral end are provided. There is one that pushes the packing into the packing housing groove by a rib by coupling to the case (for example, see Patent Document 1).

JP 2006-203127 A

  In the waterproof structure of the conventional electronic device as described above, the packing pushed into the packing housing groove by the rib is pressed against the bottom of the packing housing groove but is not pressed against both sides of the packing housing groove. Therefore, there has been a problem that the waterproof performance is not always sufficient.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to improve waterproof performance in electronic devices.

  In order to achieve this object, the present invention includes a case having at least one side opening and a lid that covers the opening of the case, and a housing provided with a waterproof space by combining the case and the lid. The case is provided with a waterproof enclosure wall surrounding the waterproof space, and the lid is provided with a packing receiving groove for receiving packing by an inner peripheral wall and an outer peripheral wall, and the waterproof enclosure wall is used for packing. In the waterproof structure for an electronic device, the packing is formed in a U-shaped cross section by a pair of side portions facing each other and a connecting portion connecting the side portions, and each side of the packing. And the inner peripheral wall and the outer peripheral wall are brought into contact with each other, and the connecting portion is pushed into the bottom side of the packing housing groove by the waterproof enclosure wall.

  According to the present invention, in the invention described above, a tip end portion of the waterproof enclosure wall is formed in a semicircular cross section, and a portion having a semicircular cross section is formed at a portion where the tip end portion of the waterproof enclosure wall of the connecting portion contacts. A push groove is provided.

  According to the present invention, in any one of the inventions described above, a positioning protrusion that fits between both side portions of the packing is provided at the bottom of the packing housing groove.

  According to the present invention, the packing is not only pressed against the bottom of the packing housing groove by pushing the packing with the waterproof enclosure wall, but also elastically deforms on the inner peripheral wall side and the outer peripheral wall side, Each side of the packing is pressed against each of these inner and outer peripheral walls. For this reason, since each side part closely_contact | adheres to each of these inner peripheral walls and outer peripheral walls, a packing is pressed on the whole surface of a packing accommodating groove, and waterproof performance improves.

  According to one of the inventions described above, the tip of the waterproof enclosure wall is fitted into the pushed groove of the packing, so that the packing is always positioned at the same position in the packing receiving groove. Each side is uniformly pressed against each of the inner peripheral wall and the outer peripheral wall.

  According to one of the above inventions, by providing the positioning protrusions fitted between the both side portions of the packing at the bottom of the packing receiving groove, the packing is sealed by the tip of the waterproof enclosure wall. When pushed into the bottom side of the receiving groove, the packing is always positioned at the same position in the packing receiving groove. For this reason, each side part of packing is uniformly pressed against each of the inner peripheral wall and the outer peripheral wall.

It is a top view of the electronic device which implemented the attachment structure of the lid concerning the present invention. It is a bottom view of the upper lid in the electronic device which implemented the attachment structure of the lid concerning the present invention. It is a perspective view which decomposes | disassembles and shows the electronic device which implemented the attachment structure of the lid concerning this invention. It is the IV-IV sectional view taken on the line in FIG. FIG. 5 is an enlarged view of a portion V in FIG. 4 for explaining elastic deformation of the packing in the lid mounting structure according to the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. An electronic apparatus generally indicated by reference numeral 1 in FIG. 3 includes a case 2 formed in a substantially frame shape having upper and lower openings 2a and 2b, and upper and lower lids 3 respectively covering the upper and lower openings 2a and 2b of the case 2. 4, and the upper and lower lids 3, 4 are coupled to the case 2 to form a housing 5.

  In the present embodiment, the lids 3 and 4 are provided on the upper and lower sides, and the waterproof structure described later is adopted in the upper and lower parts in the casing 5, respectively, but since each waterproof structure has the same structure, Only the waterproof structure will be described in detail, and the lower waterproof structure will be described as appropriate.

  A waterproof enclosure wall 8 formed in a frame shape surrounding the first waterproof space 10 for accommodating the battery 9 and the like is integrally provided at the upper open end 7 of the case 2 so as to project upward in the figure. In addition, on both sides of the waterproof enclosure wall 8, screw fixing studs 11, 11 are integrally protruded upward in the figure. The tip 8a of the waterproof enclosure wall 8 has a semicircular cross section as shown in FIG.

  As shown in FIG. 3, the lid 2 is opened at the lower side in the figure by an upper plate 13 and an enclosure wall 14 integrally protruding from the peripheral end of the upper plate 13 so as to surround the upper plate 13. The right side of the enclosure wall 13 is open. At both ends of the upper plate 13 of the lid 2, insertion holes 16, 16 through which screws 15 to be screwed onto the stud 11 are inserted.

  As shown in FIGS. 2 and 4, on the back surface of the upper plate 13 of the lid 2, an inner peripheral wall 18 formed in a frame shape corresponding to the waterproof enclosure wall 8, and the inner peripheral wall 18 An outer peripheral wall 19 provided in the periphery and formed in a frame shape together with the surrounding wall 14 is projected. The inner peripheral wall 18, the outer peripheral wall 19, and the upper plate 13 are formed so that a packing receiving groove 20 having a rectangular shape in a plan view for receiving a packing 25 described later is opposed to the waterproof enclosure wall 8.

  On the bottom portion 20a of the packing housing groove 20, a positioning projection 21 which is located at an equal distance from the inner peripheral wall 18 and the outer peripheral wall 19 and is formed in a rectangular shape in plan view is integrally projected. Yes.

  The packing 25 is made of an elastically deformable rubber material and is formed in a frame shape as shown in FIG. 3, and a pair of side portions 26 and 27 facing each other and the side portions 26 and 27 as shown in FIG. It is formed in a U-shaped cross section by a connecting portion 28 that connects between them, and a pushed-in groove 29 is provided over the entire circumference of the connecting portion 28 at the center of the outer surface of the connecting portion 28.

  The pushed groove 29 is formed in a semicircular cross section, and the radius of curvature is larger than the radius of curvature of the tip 8a of the waterproof enclosure wall 8 described above.

  When the packing 25 formed in this way is fitted into the packing housing groove 20 with the tips 26a, 27a of the side portions 26, 27 facing the bottom 20a side of the packing housing groove 20, as shown in FIG. In a state where the side surfaces 26b and 27b of the portions 26 and 27 and the inner peripheral wall 18 and the outer peripheral wall 19 are in contact with each other and the positioning ribs 21 are fitted between the side portions 18 and 19. The packing 25 is accommodated in the packing accommodating groove 20.

  Covering the opening 2a of the case 2 with the lid 3 so that the opening 25a of the lid 3 in which the packing 25 is housed in the packing housing groove 20 is abutted against the opening end 7 of the case 2 as shown in FIG. By screwing the screw 15 inserted through the insertion hole 16 into the stud 11, the lid 3 is coupled to the case 2 and the housing 5 is formed.

  When the lid 3 is coupled to the case 2, the tip 8a of the waterproof enclosure wall 8 of the case 2 comes into contact with the pushed groove 29 of the packing 25 as shown in FIG. 5, and pushes the packing 25 upward in the figure. . For this reason, the front ends 26 a and 27 a of both side portions 26 and 27 of the packing 25 are pressed against the bottom portion 20 a of the packing receiving groove 20.

  Further, since the packing 25 is formed in a U-shaped cross section, there is packing between both side portions 26 and 27 above the pushed-in groove 29 with which the front end portion 8a of the waterproof enclosure wall 8 is in contact. It is a space 33 that does not.

  For this reason, when the pushed-in groove 29 of the packing 25 is pushed upward by the distal end portion 8a of the waterproof enclosure wall 8, the side portion 26 is moved in the direction of arrow A so that the side surface 26b is pressed against the inner peripheral wall 18 side. The side portion 27 is elastically deformed and elastically deformed in the direction of arrow B so that the side surface 27b is pressed against the outer peripheral wall 19 side.

  As described above, the side portions 26 and 27 of the packing 25 are pressed and brought into close contact with the inner peripheral wall 18 and the outer peripheral wall 19, and the tips of the side portions 26 and 27 are in contact with the bottom portion 20 a of the packing receiving groove 20. Waterproofing performance is improved because it is pressed and closely adhered.

  In addition, since the tip 8 a of the waterproof enclosure wall 8 is formed in a semicircular cross section and the pushed groove 29 of the packing 25 is formed in a semicircular cross section, the tip 8 a is fitted in the pushed groove 29. Match. Therefore, since the packing 25 is always positioned at the same position in the packing receiving groove 20, the side portions 26 and 27 of the packing 25 are uniformly pressed against the inner peripheral wall 18 and the outer peripheral wall 19.

  Further, since the radius of curvature of the pushed groove 29 is formed larger than the radius of curvature of the distal end portion 8a, the upward push of the pushed groove 29 by the distal end portion 8a causes the side portion 26 to move in the arrow A direction. Since the elastic deformation of the side portion 27 and the elastic deformation of the side portion 27 in the arrow B direction become larger, the side portions 26 and 27 are more closely attached to the inner peripheral wall 18 and the outer peripheral wall 19.

  Further, by providing the positioning projection 21 that fits between the side portions 26 and 27 of the packing 25 at the bottom 20 a of the packing receiving groove 20, the packing 25 is packed by the tip 8 a of the waterproof enclosure wall 8. When being pushed up toward the bottom 20 a of the receiving groove 20, the packing 25 is always positioned at the same position in the packing receiving groove 20. For this reason, each side part 26 and 27 of the packing 25 is uniformly pressed against each of the inner peripheral wall 18 and the outer peripheral wall 19.

  A waterproof enclosure wall 41 surrounding the lower second waterproof space 40 is also formed at the lower opening end 39 of the case 2, and the above-described packing is placed in the packing receiving groove 20 formed in the lid 4. 25, and the waterproof enclosure wall 41 and the packing 25 waterproof the second waterproof space 40 in the same manner as the upper first waterproof space 10 described above.

  In the present embodiment, an example of the case 2 having the casing 5 having the two openings 2a and 2b above and below has been described. However, the present invention can also be applied to a case having an opening on either the top or bottom.

  DESCRIPTION OF SYMBOLS 1 ... Electronic device, 2 ... Case, 3, 4 ... Cover, 5 ... Housing, 8 ... Waterproof enclosure wall, 10 ... Waterproof space, 18 ... Inner wall, 19 ... Outer wall, 20 ... Packing accommodation Groove, 21 ... positioning protrusion, 25 ... packing, 26, 27 ... side, 29 ... pushed-in groove.

Claims (3)

A case having at least one surface opening and a lid covering the opening of the case are formed, and a casing provided with a waterproof space is formed by combining the case and the lid, and the waterproof space is surrounded by the case A waterproof structure for an electronic device in which a waterproof enclosure wall is provided, a packing receiving groove is provided in the lid for receiving packing by an inner peripheral wall and an outer peripheral wall, and the packing is pushed into the packing receiving groove by the waterproof enclosure wall In
The packing is formed in a U-shaped cross section by a pair of side portions facing each other and a connecting portion connecting the side portions,
Each side of the packing is brought into contact with each of the inner peripheral wall and the outer peripheral wall, and the connecting portion is pushed into the bottom side of the packing receiving groove by the waterproof enclosure wall. Waterproof structure of equipment.   A tip end portion of the waterproof enclosure wall is formed in a semicircular cross section, and a pressed groove having a semicircular cross section is provided in a portion of the connecting portion where the tip end portion of the waterproof enclosure wall contacts. The waterproof structure for an electronic device according to claim 1.   The waterproof structure for an electronic device according to claim 1, wherein a positioning protrusion that fits between both side portions of the packing is provided at the bottom of the packing housing groove.

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