JP4778877B2 - Electronic control equipment casing - Google Patents

Description

  The present invention relates to a casing of an electronic control device.

  Conventionally, casings for various electronic control devices have been proposed. Patent document 1 discloses the casing of the electronic control apparatus as the example.

  The casing of the electronic control device of Patent Literature 1 has an opening, a case member that houses a printed circuit board on which electronic components are mounted, a cover member that is attached to the opening side of the case member, and a peripheral edge of the case member And an adhesive that seals between the case member and the cover member.

In the casing, when the cover member is attached to the case member, each of the case member and the cover member is aligned with the positioning recess formed in the case member and the protrusion formed in the cover member. The peripheral edge is sealed with an adhesive (sealant) applied to the peripheral edge of the case member.
JP 2001-196770 A

  However, in the prior art described in Patent Document 1, when the cover member is attached to the case member, the protrusion of the cover member comes into contact with the adhesive applied to the peripheral edge of the case member, and the adhesive There was a case where it was scraped off.

  In that case, there is a problem that a desired sealing property cannot be ensured due to poor bonding, and the scraped adhesive is solidified to become dust.

  As a countermeasure, there is a problem in that, if equipment for attaching the cover member with high accuracy is used, the manufacturing cost increases accordingly.

  Therefore, the present invention provides an electronic control that can accurately position the case member and the cover member and can reliably seal the space between the case member and the cover member with an adhesive when the cover member is attached to the case member. The purpose is to obtain the casing of the equipment.

In order to achieve the above object, a first aspect of the present invention provides a case member that has an opening and accommodates a printed circuit board on which an electronic component is mounted, and a cover that is mounted so as to close the opening of the case member. And an electronic control that is configured such that the end surface and a portion corresponding to the end surface of the cover member are brought into contact with each other by an adhesive applied on the end surface of the peripheral edge of the opening of the case member. In the casing of the device, the cover member is provided with a projecting piece projecting outward in the lateral direction, and the case member is positioned laterally outward from the end surface to which the adhesive is applied, which receives the projecting piece. a protrusion receiving portion is provided, the guide start position of the protrusion by the protrusion receiving portion in the case member, the end face of the peripheral portion of the case member, the top of the adhesive applied onto the end face Characterized by being arranged to be between away than.

  The invention according to claim 2 is characterized in that an inclined surface that is inclined with respect to the insertion direction of the protruding piece is formed in the protruding piece receiving portion.

The invention of claim 3 has a protrusion-side uneven portion formed in the protrusion, and a receiving side uneven portion provided on the case member to the protrusion receiving portion or the protrusion receiving portion is provided, The projecting piece side uneven portion and the receiving portion side uneven portion are engaged with each other in a state where the opening of the case member is closed by the cover member.

According to the present invention, when attaching the cover member to the case member, a protrusion provided on the cover member, by inserting the protrusion receiving portion provided in the case member, the case member and the cover member Can be accurately positioned.

Then, the guide start position of the protrusion by the protrusion receiving portion of the case member, the end face of the peripheral portion of the case member, and arranged to be between away than the top surface of the adhesive applied onto the end face together we are, since by projecting protrusion on the side outward, the projecting piece can be received in the protrusion receiving portion without contacting the member forming the projection pieces in the adhesive member having the projecting piece Can prevent the adhesive from being scraped off. Thereby, the joint failure of a case member and a cover member can be suppressed, and a case member and a cover member can be more reliably sealed with an adhesive agent.

  According to the second aspect of the present invention, when the cover member is attached to the case member, the projecting piece is guided to the predetermined position by the inclined surface, so that the projecting piece can be smoothly inserted by the projecting piece receiving portion, and the cover member Assembling property can be improved.

  According to invention of Claim 3, a cover member can be more reliably fixed to a case member by engaging a protrusion piece side uneven part and a receiving part side uneven part mutually. Moreover, the structure which locks a cover member to a case member in a closed state by utilizing a projecting piece can be obtained with a relatively simple structure.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments embodying the invention will be described with reference to the drawings.

  (First Embodiment) FIG. 1 is a plan view showing a casing of an electronic control device according to the first embodiment, FIG. 2 is an enlarged plan view showing a portion A of FIG. 1, and FIG. 3 is the present embodiment. FIG. 4 is an enlarged perspective view showing a state where the cover member is open, FIG. 5 is a perspective view showing a state where the cover member is closed, and FIG. FIG. 3 is a cross-sectional view taken along the line VI-VI in FIG. 2, (a) is a view showing a state where the cover member is open, and (b) is a view showing a state where the cover member is closed. In addition, illustration of the adhesive agent 10 is abbreviate | omitted except FIG.

  A casing 1 of an electronic control device according to this embodiment includes a box-shaped case member 4 that has an opening 2 and accommodates a printed circuit board 3 on which an electronic component (not shown) is mounted, and an opening 2 of the case member 4. A relatively shallow dish-shaped cover member 5 is mounted so as to close the lid.

  In joining the case member 4 and the cover member 5, an adhesive 10 (FIG. 6) is applied to the end surface (upper surface) 6 of the peripheral edge of the opening 2 over the entire circumference. The end surface 6 and the back surface 5a of the cover member 5 are attached to each other and joined.

  The cover member 5 is formed in a square shape in a plan view, and a tongue-like projecting piece 7 projecting outward is provided at each of the four corners.

  On the other hand, at the four corners of the case member 4, projecting piece receiving portions 8 for receiving the projecting pieces 7 of the cover member 5 are provided. Specifically, the protruding piece receiving portion 8 includes a pair of protrusions 9 and 9 erected with a substantially rectangular notch groove 8a opened at the center of the corner (corner) to the cover member 5 side. The projecting piece 7 is inserted into the notch groove 8a while being guided by the side surfaces 9b, 9b of the projections 9, 9. These protrusions 9 and 9 are arranged outside (side outward) in a plan view from the annular end surface 6 (application region of the adhesive 10) at the peripheral edge.

  Therefore, when the opening 2 of the case member 4 is closed by the cover member 5, if the projecting piece 7 is not at a position corresponding to the notch groove 8 a of the projecting piece receiving portion 8, the projecting piece 7 is projected 9, 9. The cover member 5 cannot be brought close to the closed position.

  Here, in this embodiment, the guide start end position S of the projecting piece 7 by the projecting piece receiving portion 8 in the case member 4 is applied to the end surface 6 of the peripheral part of the case member 4 on the peripheral part. The agent 10 is disposed away from the top surface 10 a of the agent 10. Specifically, the tip surfaces 9 a of the protrusions 9, 9 (open ends of the notch grooves 8 a) are provided so as to protrude higher than the top surface 10 a of the adhesive 10.

  Therefore, in a state where the projecting piece 7 is not aligned with the notch groove 8a, the projecting piece 7 is closer to the end surface 6 side of the peripheral portion of the case member 4 than the front end surface 9a of the projections 9, 9, that is, the adhesive 10 Cannot move to an existing area. On the other hand, in a state where the protruding piece 7 is aligned with the notch groove 8a, the protruding piece 7 is inserted into the back side of the notched groove 8a. At this time, the projecting piece 7 does not contact the adhesive 10.

  That is, according to the present embodiment, by roughly positioning the protruding piece 7 to the protruding piece receiving portion 8, it is possible to suppress the protruding piece 7 from coming into contact with the adhesive 10.

  Further, in the present embodiment, the cover member 5 is provided with a structure in which contact with the adhesive 10 is suppressed at a plurality of locations if the protruding piece 7 as described above is roughly positioned on the protruding piece receiving portion 8. Can be aligned with respect to the case member 4 as a whole, and the portion other than the roughly positioned projecting piece 7 can also be prevented from contacting the adhesive 10.

  According to the above embodiment, when the cover member 5 is attached to the case member 4, the protrusion provided on the cover member 5 is inserted into the protrusion receiving portion 8 provided on the case member 4. Positioning of the member 4 and the cover member 5 can be performed with higher accuracy.

  At that time, the guide start end position S of the projecting piece 7 by the projecting piece receiving portion 8 in the case member 4 is set to the top of the adhesive 10 applied on the peripheral portion with respect to the end surface 6 of the peripheral portion of the case member 4. Since the protrusions 7 are arranged away from the surface 10a, the protrusions 7 can be received by the protrusions receiving part 8 without contacting the adhesive 10, and the adhesive 10 is prevented from being scraped off by the protrusions 7. be able to. As a result, the bonding failure between the case member 4 and the cover member 5 can be suppressed, and the case member 4 and the cover member 5 can be more reliably sealed by the adhesive 10.

  (Second Embodiment) FIG. 7 is a perspective view showing a casing of an electronic control device according to a second embodiment, FIG. 8 is a side view showing a state where the cover is open, and FIG. 9 is a state where the cover is closed. FIG. 10 is a cross-sectional view taken along line XX of FIG. 8 and 9 are views of the corner (corner) of the casing according to the present embodiment as viewed from the outside. Moreover, the casing according to the present embodiment includes the same components as the casing 1 according to the first embodiment. Therefore, the same components are denoted by common reference numerals, and redundant description is omitted.

  In the casing 1A of the electronic control device according to the present embodiment, the concave groove 4Ab formed on the side outer surface 4Aa of the corner portion of the case member 4A is connected to the back side of the notch groove 8Aa of the protruding piece receiving portion 8A. Thus, the protruding piece 7A provided on the cover member 5A is extended in the direction along the side outer surface 4Aa at the corner of the case member 4A in the closed state.

  The concave groove 4Ab is provided with a concave portion 11 as a receiving portion side uneven portion, while the protruding piece 7A is provided with a claw portion 12 as a protruding piece side uneven portion that engages with the receiving portion side uneven portion, and is closed. Then, the concave portion 11 and the claw portion 12 are engaged with each other so that the cover member 5A is locked to the case member 4A.

  Further, the case member 4A has inclined surfaces 13, 14, inclined as a guide surface for guiding the protruding piece 7A to a predetermined position in the closed state with respect to the insertion direction I of the protruding piece 7A into the protruding piece receiving portion 8A. 14 is formed.

  Of these, as shown in FIG. 10, the inclined surface 13 is formed as a chamfer of the end portion on the inlet side of the groove 4Ab, and corrects the positional deviation of the protruding piece 7A in the diagonal direction of the case member 4A in plan view. It has a function.

  Further, as shown in FIGS. 8 and 9, the inclined surfaces 14 and 14 are formed as both side surfaces of the notch groove 8Aa (side surfaces opposite to each other of the protrusions 9A and 9A), and the notch groove 8Aa is opened on the open side. Widened toward These inclined surfaces 14 and 14 have a function of correcting the positional deviation of the projecting piece 7A in a direction crossing the diagonal line of the case member 4A in the plan view (width direction of the notch groove 8Aa).

  That is, in this embodiment, when the cover member 5A is attached to the case member 4A, the protruding piece 7A of the cover member 5A is guided in a state sandwiched between the pair of left and right inclined surfaces 14 and 14, and further inclined. It is guided along the surface 13 to reach a predetermined position (closed position) on the back side of the projecting piece receiving portion 8A, and the concave portion 11 and the claw portion 12 are engaged with each other at this position.

  Also in the present embodiment, as shown in FIG. 8, the guide start end position S of the projecting piece 7A by the projecting piece receiving portion 8A of the case member 4A is set to the peripheral portion with respect to the end surface 6 of the peripheral portion of the case member 4A. The top surface 10a of the adhesive 10 applied on the top is spaced apart from the top surface 10a. Specifically, the tip surfaces 9Aa of the protrusions 9A and 9A (open ends of the cutout grooves 8Aa) are provided so as to protrude higher than the top surface 10a of the adhesive 10.

  According to the present embodiment described above, the same effects as those of the first embodiment can be obtained, and when the cover member 5A is attached to the case member 4A, the projecting piece 7A is positioned at a predetermined position by the inclined surfaces 13, 14, and 14. Therefore, the protruding piece 7A can be smoothly inserted by the protruding piece receiving portion 8A, and the assembling property of the cover member 5A can be improved.

  Further, the cover member 5A can be securely fixed by the case member 4A by engaging the claw portion 12 as the protrusion-side uneven portion with the recess portion 11 as the receiving portion-side uneven portion. Moreover, the structure which locks the cover member 5A to the case member 4A in the closed state can be obtained as a relatively simple structure by using the projecting piece 7A.

  Further, technical ideas other than the claims that can be grasped from the above embodiment will be described together with the effects thereof.

  (A) In the casing of the electronic control device according to any one of the first to third aspects, it is preferable to provide a plurality of combinations of the protruding piece and the protruding piece receiving portion that receives the protruding piece.

With the above, by aligning the plurality of sets of projecting pieces and protrusion receiving portion, it is possible to entirely align the casing member and the cover member, more reliable collision pieces from contacting the adhesive Can be suppressed.

  (B) In the casing of the electronic control device according to (A), the casing is formed in a substantially rectangular shape in plan view, and the combination of the protruding piece and the protruding piece receiving portion is combined with the substantially rectangular corner portion. It is preferable to provide in.

  In this case, there is an advantage that the protruding piece and the protruding piece receiving portion can be easily aligned as compared with the case where the protruding piece and the protruding piece receiving portion are provided on a side portion other than the corner portion.

(C) according to claim 1 to 3, in the above (i), the electronic control apparatus according to (b) a casing, the upper SL case member, capable grooves accepted the protrusion as the protrusion receiving portion It is preferable to provide the formed protrusion.

  In this way, the protrusion receiving part can be configured relatively simply, and the protrusion can be restrained from contacting the adhesive by locking the protrusion on the end surface of the protrusion.

The top view which shows the casing of the electronic control apparatus concerning 1st Embodiment of this invention. The enlarged view of the A section of FIG. The perspective view which shows the state which the cover member of the casing of the electronic control apparatus concerning 1st Embodiment of this invention is open. The expansion perspective view which shows the state which the cover member of the casing of the electronic control apparatus concerning 1st Embodiment of this invention is open. The perspective view which shows the state which closed the cover member of the casing of the electronic control apparatus concerning 1st Embodiment of this invention. It is sectional drawing which follows the VI-VI line | wire of FIG. 2, Comprising: (a) is a figure which shows the state in which the cover is open, (b) is a figure which shows the state which closed the cover. The perspective view which shows the casing of the electronic control apparatus concerning 2nd Embodiment of this invention. The side view which shows the state which the cover member of the casing of the electronic control apparatus concerning 2nd Embodiment of this invention is open. The side view which shows the state which closed the cover member of the casing of the electronic control apparatus concerning 2nd Embodiment of this invention. Sectional drawing which follows the XX line of FIG.

Explanation of symbols

1, 1A Casing (of electronic control device) 2 Opening 3 Printed circuit board 4, 4A Case member 5, 5A Cover member 6 End surface 7, 7A Projection piece 8, 8A Projection piece receiving portion 9, 9A Projection 11 Concavity Part)
12 Claws (projection-side irregularities)
13, 14 Inclined surface 20 Adhesive 20a Top surface S Guide start end position

Claims (3)

A case member having an opening and containing a printed circuit board on which an electronic component is mounted; and a cover member mounted so as to close the opening of the case member. In the casing of the electronic control device in which the end face and the portion corresponding to the end face of the cover member are brought into contact with each other by the adhesive applied on the end face,
Said cover member is provided with a projecting piece which projects to the side outward, to the case member, protrusion receiving portion for receiving the projecting piece, the adhesive is located on the side outward from the end face coated Provided,
Arrangement wherein the guide start position of the protrusion by the protrusion receiving portion of the case member, the end face of the peripheral portion of the case member, than the top surface of the adhesive applied on the end face by between separated A casing for an electronic control device characterized by the above.   The casing of the electronic control device according to claim 1, wherein an inclined surface that is inclined with respect to an insertion direction of the protruding piece is formed in the protruding piece receiving portion. A protrusion-side uneven portion provided on the projecting piece, the protrusion receiving portion or the protrusion receiving portion and a receiving portion side uneven portion provided on the case member which is provided, opening said cover member of said casing member The casing of the electronic control device according to claim 1, wherein the protrusion-side uneven portion and the receiving portion-side uneven portion are engaged with each other in a state where the cover is closed by the lid.

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