JP6001973B2 - Electronic unit mounting structure - Google Patents

Description

  The present invention relates to an electronic unit mounting structure for mounting an electronic unit on the upper surface of a case of an electrical junction box.

  FIG. 9 is a perspective view showing a conventional electronic unit mounting structure, and is a perspective view showing a state in the middle of mounting the electronic unit on the upper surface of the case of the electrical junction box. 10 is a cross-sectional view showing a shaft portion and a bearing portion of the electronic unit mounting structure shown in FIG.

  As shown in FIG. 9, the electronic unit mounting structure 301 is a structure for mounting the electronic unit 303 on the upper surface of the case 304 of the electrical junction box 302. A pair of shaft portions 307 are provided on one side surface of the case 305 of the electronic unit 303, and a lock portion 352 is provided on the other side surface of the case 305. The case 304 of the electrical junction box 302 is provided with a pair of bearing portions 306 for rotatably attaching the pair of shaft portions 307 and a lock receiving portion 342 to which the lock portion 352 is locked.

  In this electronic unit mounting structure 301, as shown in FIG. 10, the shaft portion 307 is inserted into the bearing portion 306, and the electronic unit 303 is rotated around the shaft portion 307, so that the shaft portion 307 becomes the bearing portion. The electronic unit 303 is attached to the upper surface of the case 304 of the electrical junction box 302 by contacting the inner surface of 306 and the lock portion 352 engaging with the lock receiving portion 342.

  In addition, ribs 371 and 361 are provided on the surface of the shaft portion 307 and the inner surface of the bearing portion 306 to suppress rattling between the electronic unit 303 and the electric connection box 302 (Patent Document 1). See).

JP 2008-172890 A

  In the electronic unit mounting structure 301 described above, since the shaft portion 307 and the bearing portion 306 are provided in pairs, two spaces for the shaft portion 307 and the bearing portion 306 are required. There was a problem of increasing the size. Furthermore, since the shaft portion 307 and the bearing portion 306 are provided with ribs 371 and 361 for suppressing backlash, the shapes of the shaft portion 307 and the bearing portion 306 are complicated, and a mold for manufacturing them. However, there is a problem that it becomes complicated and expensive.

  Accordingly, an object of the present invention is to provide an electronic unit mounting structure that has a simple structure and can be miniaturized.

In order to achieve the above object, the invention described in claim 1 is an electronic unit mounting structure in which an electronic unit is mounted on an upper surface of a case of an electrical junction box. A protrusion projecting from one side surface of the case main body, and a lock portion provided on the other side surface facing the one side surface of the case main body, wherein the case of the electrical junction box is in a direction perpendicular to the upper surface A vertical wall that extends and extends above the upper surface, a horizontal wall that protrudes from above the upper surface of the vertical wall to the side on which the electronic unit is mounted, and a protrusion housing that is located below the horizontal wall A space, and a lock receiving portion disposed at a position facing the vertical wall, the horizontal wall is provided with a guide protrusion protruding downward, and the protrusion includes A guide groove for positioning the guide protrusion is provided, the protrusion is inserted into the protrusion receiving space, and the electronic unit is rotated around the protrusion, whereby the protrusion is formed on the horizontal wall. The electronic unit mounting structure is characterized in that the electronic unit is mounted on the upper surface of the case of the electrical junction box while being in contact with the lock portion and being engaged with the lock receiving portion.
In order to achieve the above object, the invention described in claim 2 is the electronic unit mounting structure in which the electronic unit is attached to the upper surface of the case of the electrical junction box. A protrusion projecting from one side surface of the case main body, and a lock portion provided on the other side surface facing the one side surface of the case main body, wherein the projecting portion is formed in a rectangular parallelepiped shape, There is only one center in the longitudinal direction of one side, and the case of the electrical junction box extends in a direction orthogonal to the upper surface and extends upward from the upper surface, and the vertical wall A horizontal wall projecting from the upper side to the side on which the electronic unit is mounted, a protrusion accommodating space located below the horizontal wall, and a position facing the vertical wall. And the protrusion is inserted into the protrusion receiving space, and the electronic unit is rotated around the protrusion so that the protrusion is attached to the horizontal wall. The electronic unit mounting structure is characterized in that the electronic unit is mounted on the upper surface of the case of the electrical junction box while being in contact with the lock portion and being engaged with the lock receiving portion.

The invention described in claim 3 is characterized in that, in the invention described in claim 1 or 2 , the projecting portion accommodating space reaches the lower side of the upper surface from the horizontal wall.

The invention described in claim 4 is the invention described in any one of claims 1 to 3 , wherein the electrical junction box and the electronic unit are rotated around the protrusion. Thus, it has a connector that fits to each other.

The invention described in claim 5 is the invention described in any one of claims 1 to 4 , wherein a plurality of protrusions are provided on the upper surface of the case of the electrical junction box to suppress the play of the electronic unit. Is provided.

According to the invention described in claim 1, the case of the electronic unit includes a case main body that accommodates components, a protruding portion that protrudes from one side surface of the case main body, and another that faces one side surface of the case main body. A vertical wall extending in a direction perpendicular to the upper surface and extending upward from the upper surface, and a case in which the case of the electrical junction box extends from the upper surface of the vertical wall. A horizontal wall projecting from above to the side on which the electronic unit is mounted, a protruding portion accommodating space located below the horizontal wall, and a lock receiving portion disposed at a position facing the vertical wall. The projecting portion is inserted into the projecting portion receiving space, and the electronic unit is rotated around the projecting portion, whereby the projecting portion comes into contact with the horizontal wall and the lock portion is Engaged with the click receiving part, since the electronic unit is attached to the case upper surface of the electrical connection box, it is possible to provide an electronic unit mounting structure capable simple structure a and downsizing.
Further, the horizontal wall is provided with a guide protrusion protruding downward, and the protrusion is provided with a guide groove for positioning the guide protrusion, so that the protrusion and the protrusion accommodating space can be easily positioned. Can do.
According to the invention described in claim 2 , the case of the electronic unit includes a case main body that accommodates components, a protruding portion that protrudes from one side surface of the case main body, and another that faces one side surface of the case main body. A locking portion provided on a side surface, the protruding portion is formed in a rectangular parallelepiped shape, and only one protruding portion is provided at the center in the longitudinal direction of the one side surface. A vertical wall extending in a direction orthogonal to the upper surface and extending upward from the upper surface; a horizontal wall projecting from above the upper surface of the vertical wall to a side to which the electronic unit is attached; and the horizontal wall A protrusion receiving space located below the vertical wall, and a lock receiving portion disposed at a position facing the vertical wall, and the protruding portion is inserted into the protruding portion receiving space, and the protruding portion is centered. To By rotating the unit, the projecting portion comes into contact with the horizontal wall and the lock portion is locked to the lock receiving portion, so that the electronic unit is attached to the upper surface of the case of the electrical connection box. It is possible to provide an electronic unit mounting structure that has a simple structure and can be miniaturized.

According to the invention described in claim 3 , since the protruding portion receiving space reaches the lower side of the upper surface from the horizontal wall, the protruding portion can be provided at a lower position, and the protruding portion receiving space can be provided. Can be smaller. Therefore, it is possible to provide an electronic unit mounting structure that can be further downsized.

According to the invention described in claim 4 , the electrical junction box and the electronic unit have connectors that are fitted to each other when the electronic unit is rotated around the protruding portion. The connector can be fitted together with the electronic unit.

According to the invention described in claim 5 , since the plurality of convex portions that suppress the play of the electronic unit are provided on the upper surface of the case of the electrical junction box, the shape of the projecting portion and the projecting portion accommodating space is provided. It is possible to perform rattling without complicating.

It is a perspective view which shows the electronic unit attachment structure concerning the 1st Embodiment of this invention, and is a perspective view which shows the state in the middle of the electronic unit being attached to the case upper surface of an electrical-connection box. It is a perspective view which shows the state by which the electronic unit shown by FIG. 1 was attached to the case upper surface of an electrical-connection box. FIG. 3 is a plan view of the electronic unit mounting structure shown in FIG. 2. It is sectional drawing along the AA line in FIG. It is a principal part enlarged view of the electronic unit attachment structure shown by FIG. It is a perspective view which shows only the electric junction box shown by FIG. It is a perspective view which shows only the electronic unit shown by FIG. It is a perspective view which shows the electronic unit used for the electronic unit attachment structure concerning the 2nd Embodiment of this invention. It is a perspective view which shows the conventional electronic unit attachment structure, and is a perspective view which shows the state in the middle of the electronic unit being attached to the case upper surface of an electrical-connection box. It is sectional drawing which shows the axial part and bearing part of the electronic unit attachment structure which were shown by FIG.

(First embodiment)
An “electronic unit mounting structure” according to the first embodiment of the present invention will be described with reference to FIGS.

  The electronic unit mounting structure 1 shown in FIGS. 1 to 5 is a structure for mounting the electronic unit 3 on the upper surface 40 a of the case 4 of the electrical junction box 2.

  The electronic unit 3 is attached to the upper surface 40 a of the case 4 of the electrical junction box 2 and is electrically connected to the electrical junction box 2. As shown in FIGS. 3, 4, and 7, the electronic unit 3 includes a substrate 16, connectors 17, 18, and 19 connected to the substrate 16, and a synthetic resin case 5 that accommodates them. ing.

  The case 5 includes a case main body 50 formed in a flat plate shape, a protruding portion 51 protruding from one side surface 50c of the case main body 50, and a lock portion provided on the other side surface 50d facing the one side surface 50c of the case main body 50. 52. The protrusion 51 is formed in a rectangular parallelepiped shape. A guide groove 53 is provided at the center of the protruding portion 51.

  Reference numeral 50 a indicates the upper surface of the case main body 50, reference numeral 50 b indicates the lower surface of the case main body 50, and reference numerals 50 e and 50 f indicate the side surfaces of the case main body 50. The connector 17 protrudes from the side surface 50e, the connector 19 protrudes from the side surface 50f, and the connector 18 protrudes from the lower surface 50b. Further, the connector 18 is fitted with the connector 14 of the electrical junction box 2.

  The electrical junction box 2 is mounted on a vehicle and supplies power and transmits signals to an electronic device mounted on the vehicle. In the present invention, a junction block (also referred to as a junction box), a fuse block (also referred to as a fuse box), and a relay block (also referred to as a relay box) are collectively referred to as an electrical connection box.

  As shown in FIGS. 3, 4, and 6, the electrical connection box 2 includes a substrate 10, a fuse 11 and a relay 12 mounted on the substrate 10, connectors 13, 14, and 15 connected to the substrate 10, and these And a case 4 made of synthetic resin.

  The case 4 includes a case main body 40 formed in a rectangular box shape, a projecting portion attaching portion 6 for attaching the projecting portion 51, and a side surface 40c of the case main body 40. And a lock receiving portion 42 provided on the opposite other side surface 40d. The lock receiving portion 42 is engaged with the lock portion 52.

  Reference numeral 40 a indicates the upper surface of the case main body 40, reference numeral 40 b indicates the lower surface of the case main body 40, and reference numerals 40 e and 40 f indicate the side surfaces of the case main body 40. The connector 13 protrudes from the side surface 40e, the connector 15 protrudes from the side surface 40f, and the connector 14 protrudes from the upper surface 40a. The connector 14 is fitted with the connector 18 of the electronic unit 3. The upper surface 40a is provided with a plurality of convex portions 41 that suppress the play of the electronic unit 3.

  As shown in FIG. 5, the protrusion mounting portion 6 extends in a direction orthogonal to the upper surface 40a and extends upward from the upper surface 40a, and stands from the upper surface 40a and faces the vertical wall 61. An opposing wall 62, a horizontal wall 64 projecting from above the upper surface 40a of the vertical wall 61 to the side on which the electronic unit 3 is mounted, and a protrusion accommodating space 66 located below the horizontal wall 64. Yes. The vertical wall 61 is disposed at a position facing the lock receiving portion 42. The opposing wall 62 is disposed closer to the lock receiving portion 42 than the vertical wall 61. Further, an opening 63 corresponding to the shape of the protruding portion 51 is formed in the facing wall 62. The horizontal wall 64 connects the vertical wall 61 and the opposing wall 62, and continues to the edge of the opening 63. Further, a guide protrusion 65 protruding downward is provided at the center of the horizontal wall 64. The guide protrusion 65 is positioned in a guide groove 53 provided in the protruding portion 51. The protrusion accommodating space 66 extends from the horizontal wall 64 to the lower side of the upper surface 40a, and is constituted by an internal space of the case body 40 and a space on the back side of the opening 63, that is, on the vertical wall 61 side. .

  When the electronic unit 3 described above is attached to the upper surface 40a of the case 4 of the electrical junction box 2, the protruding portion 51 is inserted into the protruding portion receiving space 66 from the opening 63 with the electronic unit 3 tilted as shown in FIG. Then, the electronic unit 3 is rotated around the protruding portion 51. As a result, the projecting portion 51 comes into contact with the horizontal wall 64 and the lock portion 52 is locked to the lock receiving portion 42, so that the electronic unit 3 is attached to the upper surface 40a of the case 4 of the electrical junction box 2 as shown in FIG. It is done. Further, the connectors 14 and 18 are fitted to each other when the electronic unit 3 is rotated as described above.

  Further, when the protrusion 51 is inserted into the protrusion accommodating space 66, the protrusion 51 is passed through the opening 63, and the guide protrusion 65 is positioned in the guide groove 53, so that the positioning is performed easily and accurately. be able to.

  In the electronic unit 3 thus attached to the upper surface 40a of the case 4 of the electrical junction box 2, the upper surface of the protruding portion 51 abuts against the horizontal wall 64, the lock portion 52 is locked to the lock receiving portion 42, and the case main body. When the lower surface 50b of 50 comes into contact with the convex portion 41 of the upper surface 40a of the case main body 40, displacement and backlash are suppressed.

  According to the electronic unit mounting structure 1 described above, the shapes of the protruding portion 51 and the protruding portion mounting portion 6 can be simplified, and the mold for manufacturing them can also be simplified. Moreover, since the protrusion part 51 and the protrusion part attaching part 6 are a simple shape and only one set is provided, space saving can be achieved. Moreover, since the convex part 41 which suppresses the rattling of the electronic unit 3 is provided in the case 4 upper surface 40a of the electrical junction box 2, it is a backlash without complicating the shape of the protrusion part 51 and the protrusion part attaching part 6. FIG. It can be performed.

(Second Embodiment)
An “electronic unit mounting structure” according to the second embodiment of the present invention will be described with reference to FIG. In FIG. 8, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 8 is a perspective view showing an electronic unit used in the electronic unit mounting structure according to the second embodiment of the present invention. The electronic unit 3 ′ has the same configuration as the electronic unit 3 of the first embodiment except that the guide groove 53 (see FIG. 7) is not provided in the protruding portion 51 ′. Although the illustration of the electrical junction box to which the electronic unit 3 ′ is attached is omitted, the electrical junction box is the first embodiment except that the guide protrusion 65 (see FIG. 6) is not provided. It is the structure same as the electrical junction box 2 of a form.

  As described above, in the electronic unit mounting structure, the guide groove 53 and the guide protrusion 65 are not necessarily provided.

  In the first and second embodiments described above, the protruding portion accommodating space 66 is configured to reach the lower side of the upper surface 40a from the horizontal wall 64. However, the protruding portion accommodating space 66 is not necessarily the upper surface 40a. It is not necessary to reach below the horizontal wall 64, and it is only necessary to be positioned below the horizontal wall 64. In the first and second embodiments, since the protruding portion accommodating space 66 is configured to reach the lower side of the upper surface 40a from the horizontal wall 64, the protruding portion 51 can be provided at a lower position. The part accommodating space 66 can be made smaller.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Electronic unit mounting structure 2 Electrical connection part 3, 3 'Electronic unit 4,5 Case 40a Upper surface 42 Lock receiving part 50 Case main body 50c One side 50d Other side 51 Projection part 52 Lock part 61 Vertical wall 64 Horizontal wall 66 Projection part accommodation space

Claims (5)

  In the electronic unit mounting structure in which the electronic unit is mounted on the upper surface of the case of the electrical junction box,
  The case of the electronic unit includes a case main body that accommodates components, a protruding portion that protrudes from one side surface of the case main body, and a lock portion that is provided on the other side surface facing the one side surface of the case main body. ,
  A case of the electrical junction box extends in a direction perpendicular to the upper surface and extends upward from the upper surface, and projects from the upper surface of the vertical wall to the side on which the electronic unit is attached. A horizontal wall, a protrusion accommodating space located below the horizontal wall, and a lock receiving portion disposed at a position facing the vertical wall,
  A guide protrusion protruding downward is provided on the horizontal wall,
  The protrusion is provided with a guide groove for positioning the guide protrusion,
  When the protruding portion is inserted into the protruding portion receiving space and the electronic unit is rotated around the protruding portion, the protruding portion contacts the horizontal wall and the lock portion is the lock receiving portion. The electronic unit is attached to the upper surface of the case of the electrical junction box.
  An electronic unit mounting structure characterized by that. In the electronic unit mounting structure in which the electronic unit is mounted on the upper surface of the case of the electrical junction box,
The case of the electronic unit includes a case main body that accommodates components, a protruding portion that protrudes from one side surface of the case main body, and a lock portion that is provided on the other side surface facing the one side surface of the case main body. ,
The protrusion is formed in a rectangular parallelepiped shape, and only one protrusion is provided at the longitudinal center of the one side surface;
A case of the electrical junction box extends in a direction perpendicular to the upper surface and extends upward from the upper surface, and projects from the upper surface of the vertical wall to the side on which the electronic unit is attached. A horizontal wall, a protrusion accommodating space located below the horizontal wall, and a lock receiving portion disposed at a position facing the vertical wall,
When the protruding portion is inserted into the protruding portion receiving space and the electronic unit is rotated around the protruding portion, the protruding portion contacts the horizontal wall and the lock portion is the lock receiving portion. The electronic unit mounting structure, wherein the electronic unit is mounted on the upper surface of the case of the electrical junction box. 3. The electronic unit mounting structure according to claim 1, wherein the protrusion accommodating space reaches the lower side of the upper surface from the horizontal wall. 4. The electrical connection box and the electronic unit each include a connector that fits together when the electronic unit is rotated around the protruding portion . 5. The electronic unit mounting structure according to Item 1 . The case upper surface of the electrical connection box, the electronic unit mounting structure according to any one of claims 1-4, characterized in that said a plurality of protrusions suppress rattling of the electronic unit is provided .

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