JP2014096959A - Electronic unit attachment structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic unit attachment structure with a simple structure.SOLUTION: A case 5 of an electronic unit 3 includes a case body 50, a first projection part 51 and a second projection part projected from one side surface 50c of the case body 50, and a lock part 52 attached to the other side surface 50d. A case 4 of an electric connection box 2 includes a vertical wall 6 which is erected orthogonally to an upper surface 40a of the case 4 and on which a first insertion part 61 and a second insertion part are formed and a lock receiving part 42. When the first projection part 51 is inserted into the first insertion part 61, the second projection part is inserted into the second insertion part, and the electronic unit 3 is rotated around the first projection part 51, the lock part 52 is engaged with the lock receiving part 42 and the electronic unit 3 is attached to the upper surface 40a. In the state, movement of the second projection part in an arrow Y direction and a Z direction is regulated by the second insertion part.

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. 18 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. 19 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. 18, 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. 19, the shaft portion 307 is inserted into the bearing portion 306, and the electronic unit 303 is rotated around the shaft portion 307, whereby 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, the electronic unit 303 is attached to the surface of the shaft part 307 and the inner surface of the bearing part 306 at the same time as the electronic unit 303 is attached to the electric connection box 302. Ribs 371 and 361 for suppressing backlash are provided (see Patent Document 1).

JP 2008-172892 A

  In the electronic unit mounting structure 301 described above, since the ribs 371 and 361 are provided on both the shaft portion 307 and the bearing portion 306 to prevent rattling, the shapes of the shaft portion 307 and the bearing portion 306 are the same. There is a problem that the manufacturing process is complicated and the molds for manufacturing these are also complicated, resulting in high costs.

  Accordingly, an object of the present invention is to provide an electronic unit mounting structure having a simple structure.

  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, wherein the case of the electronic unit includes a case main body that accommodates parts, A first projecting portion projecting from one side surface of the case body; a second projecting portion projecting from the one side surface; and a lock portion provided on the other side surface facing the one side surface; The case includes a vertical wall extending in a direction perpendicular to the upper surface and extending upward from the upper surface, and a lock receiving portion disposed at a position facing the vertical wall. Are formed on the side of the lock receiving part, and a first insertion part into which the first protruding part is inserted and a second insertion part which is opened on the side of the lock receiving part and into which the second protruding part is inserted. , The first protrusion is in front The lock unit is inserted into the first insertion part and the second protrusion is inserted into the second insertion part, and the electronic unit is rotated around the first protrusion, whereby the lock part is moved to the lock receiver. The electronic unit is attached to the upper surface of the case of the electrical junction box, and in this state, the second projecting portion moves in a direction perpendicular to the upper surface and is parallel to the upper surface and the The electronic unit mounting structure is characterized in that movement in a direction orthogonal to a facing direction between the vertical wall and the lock receiving portion is restricted by the second insertion portion.

  According to a second aspect of the present invention, in the first aspect of the invention, the second insertion portion is formed so that the interval gradually decreases from the upper surface side toward the upper side. It is a feature.

  The invention described in claim 3 is the invention described in claim 1 or 2, wherein the second protrusion has a longer protrusion length from the one side than the first protrusion. It is what.

  The invention described in claim 4 is the invention described in any one of claims 1 to 3, wherein the case of the electronic unit further includes a third protruding portion protruding from the one side surface. The third projecting portion and the second projecting portion are disposed on both sides of the first projecting portion, and the vertical wall opens to the lock receiving portion side, and the third projecting portion is inserted therein. A third insertion portion is further formed, and the upper surface of the third projection portion is in contact with the inner surface of the third insertion portion in a state where the electronic unit is attached to the upper surface of the case of the electrical junction box. To do.

  The invention described in claim 5 is the invention described in any one of claims 1 to 4, wherein the electric junction box and the electronic unit are arranged so that the electrons are centered on the first protrusion. It has the connector which mutually fits by rotating a unit.

  The invention described in claim 6 is the invention described in any one of claims 1 to 5, wherein a plurality of backlashes of the electronic unit are suppressed on the upper surface of the case of the electrical junction box. A convex portion 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 first protrusion protruding from one side surface of the case main body, and a second protrusion protruding from the one side surface. A protruding portion and a lock portion provided on the other side surface opposite to the one side surface, and the case of the electrical junction box extends in a direction orthogonal to the upper surface and extends upward from the upper surface. A vertical wall, and a lock receiving portion disposed at a position facing the vertical wall, wherein the vertical wall is open to the lock receiving portion side, and the first protrusion is inserted into the first wall. A second insertion part is formed which opens to the insertion part and the lock receiving part side and into which the second projection part is inserted, the first projection part is inserted into the first insertion part, and the second projection part is Inserted into the second insertion portion, the first protrusion By rotating the child unit, the lock portion is locked to the lock receiving portion, and the electronic unit is attached to the upper surface of the case of the electrical connection box. In this state, the second projecting portion is The second insertion portion restricts movement in a direction perpendicular to the upper surface and movement in a direction parallel to the upper surface and perpendicular to the opposing direction of the vertical wall and the lock receiving portion. One protrusion functions as a rotation center axis, and the second protrusion and the second insertion part function as a backlash filling member. Therefore, an electronic unit mounting structure with a simple structure can be provided.

  According to the second aspect of the present invention, since the second insertion portion is formed so that the interval gradually decreases from the upper surface side toward the upper side, the second protrusion and the second insertion portion are formed. The shape of the part can be simplified, and the electronic unit can be smoothly rotated with a small force.

  According to the invention described in claim 3, the second projecting portion has a projecting length from the one side surface larger than that of the first projecting portion. Therefore, the second projecting portion is inserted into the second inserting portion. Thus, the first projecting portion can be positioned in the first insertion portion, and the electronic unit can be easily attached. In addition, when the electronic unit is not installed by being rotated, but is forced to be inserted between the vertical wall and the lock receiving portion, the electronic unit is forcibly pushed by the second projecting portion hitting the vertical wall. It is possible to prevent the electronic unit from being pushed in, and to prevent erroneous mounting of the electronic unit.

  According to the invention described in claim 4, the case of the electronic unit further includes a third protrusion protruding from the one side surface, and the third protrusion and the second protrusion are the first protrusion. A third insertion portion that is open on the lock receiving portion side and into which the third protrusion is inserted, and is formed on the upper surface of the case of the electrical junction box. In the state where the electronic unit is attached, the upper surface of the third projecting portion comes into contact with the inner surface of the third insertion portion, so that the electronic unit can be reliably prevented from rattling in the vertical direction.

  According to the fifth aspect of the present invention, the electrical junction box and the electronic unit have connectors that fit together when the electronic unit is rotated around the first protrusion. As a result, the connector can be fitted together with the electronic unit.

  According to the invention described in claim 6, 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 play of the electronic unit in the vertical direction is prevented. It can be surely suppressed.

It is a top view which shows the electronic unit attachment structure concerning one Embodiment of this invention, and is a top view which shows the state in which the electronic unit was attached to the case upper surface of an electrical-connection box. 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 an enlarged view of the A section in FIG. It is an enlarged view of the B section in FIG. It is an enlarged view of the C section in FIG. It is sectional drawing which shows the state in the middle of the electronic unit shown by FIG. 1 being attached to the case upper surface of an electrical-connection box. It is sectional drawing which shows the state by which the electronic unit shown by FIG. 7 was attached to the case upper surface of an electrical-connection box. It is an enlarged view of the D section in FIG. It is an enlarged view of the E section in FIG. It is sectional drawing which shows the 2nd protrusion part and 2nd insertion part in the state of FIG. It is sectional drawing which shows the 2nd protrusion part and 2nd insertion part in the state of FIG. It is the figure which looked at the 2nd protrusion part and the 2nd insertion part from the arrow F direction in FIG. It is the figure which looked at the 2nd protrusion part and the 2nd insertion part from the arrow G direction in FIG. It is sectional drawing which shows the 3rd protrusion part and 3rd insertion part in the state of FIG. It is sectional drawing which shows the 3rd protrusion part and 3rd insertion part in the state of FIG. It is explanatory drawing for demonstrating the effect of the electronic unit attachment structure shown by FIG. 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 shown by FIG.

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

  The electronic unit mounting structure 1 shown in FIG. 1 is a structure in which the electronic unit 3 is mounted 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 to 8, 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. .

  The case 5 includes a case body 50 formed in a flat plate shape, a first protrusion 51, a second protrusion 54, a third protrusion 55, a pair of ribs 56 protruding from one side surface 50c of the case body 50, And a lock portion 52 provided on the other side surface 50d facing the one side surface 50c of the case main body 50. The first protrusion 51 is disposed at the center of the one side surface 50 c, and the second protrusions 54 and the third protrusions 55 are disposed on both sides of the first protrusion 51. The pair of ribs 56 are disposed on both sides of the third protrusion 55.

  The said 1st protrusion part 51 is formed in the rectangular parallelepiped shape, as shown in FIG. In the present invention, reference numeral 51 a in FIG. 4 is referred to as the upper surface of the first protrusion 51, and reference numerals 51 b and 51 c are referred to as side surfaces of the first protrusion 51. When the electronic unit 3 is attached to the upper surface 40a of the case 4 of the electrical junction box 2, the first protruding portion 51 is inserted into a first insertion portion 61 described later and functions as a rotation center axis. Details will be described later.

  The said 2nd protrusion part 54 is formed in the column shape, as shown in FIG. The second projecting portion 54 has a projecting length from the one side surface 50 c of the case body 50 larger than that of the first projecting portion 51. The second projecting portion 54 is inserted into a second insertion portion 64 described later (see FIG. 14) in a state where the electronic unit 3 is attached to the upper surface 40a of the case 4 of the electrical junction box 2 (see FIG. 14). Along with the two insertion portions 64, the electronic unit 3 functions as a backlash filling member that suppresses backlash in the arrow Y direction and the arrow Z direction. Further, in order to easily deform the contact portion 54b (H portion in FIG. 14) that comes into contact with the second insertion portion 6, a hollow portion 54a (cavity) is formed at the center of the second protrusion 54. Yes. Details of the backlash filling structure of the second protrusion 54 and the second insertion portion 64 will be described later.

  The said 3rd protrusion part 55 is formed in plate shape, as shown in FIG. The third protruding portion 55 is inclined in a direction approaching the upper surface 50a of the case body 50 as the distance from the one side surface 50c of the case body 50 increases. The third protruding portion 55 suppresses rattling of the electronic unit 3 in the arrow Y direction together with a third insertion portion 65 described later in a state where the electronic unit 3 is attached to the upper surface 40a of the case 4 of the electrical junction box 2. It functions as a backlash filling member. Details will be described later.

  3 indicates the upper surface of the case main body 50, reference numeral 50b indicates the lower surface of the case main body 50, and reference numerals 50e and 50f 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. 2, 7, and 8, 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 is provided on the side of the case main body 40 formed in a rectangular box shape and one side surface 40c of the case main body 40, extends in a direction (arrow Y direction) perpendicular to the upper surface 40a of the case main body 40, and from the upper surface 40a. And a vertical wall 6 extending upward, and a lock receiving portion 42 provided on the other side surface 40d facing the one side surface 40c of the case body 40. The vertical wall 6 and the lock receiving portion 42 are arranged at positions facing each other. The lock receiving portion 42 is engaged with the lock portion 52.

  2 indicates the upper surface of the case main body 40, reference numeral 40b indicates the lower surface of the case main body 40, and reference numerals 40e and 40f 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 40 a is provided with a plurality of convex portions 41 that suppress the play of the electronic unit 3 in the arrow Y direction.

  The vertical wall 6 opens to the lock receiving portion 42 side, and the first insertion portion 61 into which the first protruding portion 51 is inserted, and the second protruding portion 54 opens to the lock receiving portion 42 side. A second insertion portion 64 and a third insertion portion 65 that opens to the lock receiving portion 42 side and into which the third protrusion 55 and the pair of ribs 56 are inserted are formed.

  As shown in FIGS. 7 to 10, the internal space of the first insertion portion 61 extends from above to below the upper surface 40 a of the case main body 40 and communicates with the internal space of the case main body 40. As shown in FIG. 10, the opening of the first insertion portion 61 is formed to be slightly larger than the outer periphery of the first protrusion 51.

  As shown in FIGS. 2 and 11 to 14, the second insertion portion 64 is formed through the vertical wall 6. Moreover, the 2nd insertion part 64 is formed so that a space | interval may become narrow gradually as it goes upwards from the upper surface 40a side of the case main body 40. As shown in FIG.

  When the above-described electronic unit 3 is attached to the upper surface 40a of the case 4 of the electrical junction box 2, as shown in FIGS. 2 is inserted into the insertion portion 64, and then the first protrusion 51 is inserted into the first insertion portion 61 and the third protrusion 55 and the pair of ribs 56 are inserted into the third insertion portion 65, The electronic unit 3 is rotated around the one protrusion 51. As a result, as shown in FIG. 8, the lock portion 52 is locked to the lock receiving portion 42, and the electronic unit 3 is attached to the upper surface 40 a of the case 4 of the electrical connection box 2. Further, the connectors 14 and 18 are fitted to each other when the electronic unit 3 is rotated as described above.

  Further, as described above, the electronic unit 3 is attached to the upper surface 40a of the case 4 of the electrical junction box 2, and at the same time, the second projecting portion 54 is formed on the outer peripheral surface of the second projecting portion 54 as shown in FIG. The point, that is, the contact portion 54b described above contacts or elastically contacts the inner surface of the second insertion portion 64. As a result, the second projecting portion 54 moves in a direction orthogonal to the upper surface 40a (in the arrow Y direction), and is parallel to the upper surface 40a and in the opposite direction of the vertical wall 6 and the lock receiving portion 42 (in the arrow X direction). Movement in the orthogonal direction (arrow Z direction) is restricted by the second insertion portion 64.

  In terms of design, it is designed so that no pressure is generated at the contact point (H portion in FIG. 14) between the contact portion 54b of the second protrusion 54 and the inner surface of the second insertion portion 64. When a dimensional error occurs in the case 5, the contact portion 54 b comes into elastic contact with the inner surface of the second insertion portion 64.

  Further, as described above, the electronic unit 3 is attached to the upper surface 40a of the case 4 of the electrical junction box 2, and at the same time, the third protrusion 55 has an upper surface and a distal end 55a as the third insertion portion as shown in FIG. It abuts against the inner surface 65a of 65.

  Further, as described above, the upper surface 51a of the first protruding portion 51 is the inner surface of the first insertion portion 61 as shown in FIG. 10 in a state where the electronic unit 3 is attached to the upper surface 40a of the case 4 of the electrical junction box 2. It is spaced from 61a. Further, the side surfaces 51b and 51c of the first projecting portion 51 are spaced from the inner surface of the first insertion portion 61, although illustration is omitted. That is, the first protrusion 51 does not contact the inner surface of the first insertion portion 61.

  Thus, in the electronic unit 3 attached to the upper surface 40a of the case 4 of the electrical junction box 2, the two points on the outer peripheral surface of the second protrusion 54 come into contact with the inner surface of the second insertion part 64, and the third protrusion The upper surface and the distal end portion 55a of the portion 55 are in contact with the inner surface 65a of the third insertion portion 65, and the lower surface 50b of the case main body 50 is in contact with the convex portion 41 of the upper surface 40a of the case main body 40. The backlash is suppressed. Further, in the electronic unit 3, rattling in the arrow Z direction is suppressed when two points on the outer peripheral surface of the second protrusion 54 come into contact with the inner surface of the second insertion portion 64. Further, in the electronic unit 3, rattling in the arrow X direction is suppressed when the lock portion 52 is engaged with the lock receiving portion 42.

  Further, as described above, a method of attaching the electronic unit mounting structure 1 to the case 4 upper surface 40a of the electrical junction box 2 while rotating the electronic unit 3 is a correct mounting method of the electronic unit mounting structure 1. On the other hand, as shown in FIG. 17, when the electronic unit 3 is forcibly pushed between the vertical wall 6 and the lock receiving portion 42 (an arrow J indicates the direction of the pressing force), It is possible to prevent the electronic unit 3 from being forcibly pushed by the second projecting portion 54 hitting the vertical wall 6, and to prevent the electronic unit 3 from being erroneously attached. When the electronic unit 3 is forced to be inserted between the vertical wall 6 and the lock receiving portion 42, not only the second projecting portion 54 but also the first projecting portion 51 hits the vertical wall 6. Since the first projecting portion 51 has a smaller projecting length from the one side surface 50 c of the case body 50 than the second projecting portion 54, the electronic unit 3 is formed between the vertical wall 6 and the lock receiving portion 42 without the second projecting portion 54. There is a risk of being pushed in between.

  According to the electronic unit mounting structure 1 described above, the first protrusion 51 functions as the rotation center axis, and the second protrusion 54 and the second insertion part 64 function as the backlash member. Backlash can be performed without complicating the shape of the first insertion portion 61. Moreover, since the 1st protrusion part 51 and the 1st insertion part 61 are simple shapes, the metal mold | die which manufactures these can also be simplified. Further, the backlash in the vertical direction of the electronic unit 3 can be reliably suppressed by the third protrusion 55, the third insertion portion 65, and the convex portion 41 of the upper surface 40a of the case 4.

  Furthermore, according to the electronic unit mounting structure 1, the second insertion portion 64 is formed so that the interval gradually decreases from the upper surface 40a side of the case 4 toward the upper side. The shape of the second insertion portion 64 can be simplified, and the electronic unit 3 can be smoothly rotated with a small force. In addition, since the protrusion length of the second protrusion portion 54 from the one side surface 50 c of the case body 50 is larger than that of the first protrusion portion 51, the first protrusion portion 54 is inserted into the second insertion portion 64 so that the first protrusion portion 54 is inserted into the first insertion portion 64. The protruding portion 51 can be positioned in the first insertion portion 61, and the electronic unit 3 can be easily attached.

  In the embodiment described above, the opening of the first insertion portion 61 is slightly larger than the outer periphery of the first protrusion 51 in order to facilitate the insertion of the first protrusion 51 into the first insertion portion 61. As a result, the first projecting portion 51 is not in contact with the inner surface of the first insertion portion 61 in a state where the electronic unit 3 is attached to the upper surface 40a of the case 4 of the electrical junction box 2. In the present invention, the first protrusion 51 may be in contact with the inner surface of the first insertion portion 61.

  In the above-described embodiment, since the first protrusion 51 is arranged at the center of the one side surface 50c of the case body 50, the second protrusion is the most preferable form for suppressing the play of the electronic unit 3. 54 and the third projecting portion 55 are disposed on both sides of the first projecting portion 51, but in the present invention, the first projecting portion 51 may be disposed on any one side surface 50c of the case body 50. In the present invention, the third projecting portion 55 is not an essential configuration and can be omitted.

  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 Electronic unit 4 Case 5 Case 6 Vertical wall 42 Lock receiving part 50 Case main body 51 1st protrusion part 52 Lock part 54 2nd protrusion part 61 1st insertion part 64 2nd insertion part

Claims (6)

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 first protrusion protruding from one side of the case main body, a second protrusion protruding from the one side, and another side facing the one side. And a lock portion provided in
The case of the electrical junction box has a vertical wall extending in a direction orthogonal to the upper surface and extending upward from the upper surface, and a lock receiving portion disposed at a position facing the vertical wall,
The vertical wall has an opening on the lock receiving portion side, the first insertion portion into which the first protrusion is inserted, and a second insertion in which the second protrusion is inserted with an opening on the lock receiving portion side. Part is formed,
The first protrusion is inserted into the first insertion part, the second protrusion is inserted into the second insertion part, and the electronic unit is rotated around the first protrusion. The lock part is locked to the lock receiving part, and the electronic unit is attached to the upper surface of the case of the electrical junction box. In this state, the second projecting part moves in a direction perpendicular to the upper surface. The electronic unit mounting structure is characterized in that movement in a direction parallel to the upper surface and perpendicular to the opposing direction of the vertical wall and the lock receiving portion is restricted by the second insertion portion. 2. The electronic unit mounting structure according to claim 1, wherein the second insertion portion is formed such that the interval gradually decreases from the upper surface side toward the upper side. 3. The electronic unit mounting structure according to claim 1, wherein the second projecting portion has a projecting length from the one side surface larger than that of the first projecting portion. The case of the electronic unit further includes a third protrusion protruding from the one side surface, and the third protrusion and the second protrusion are disposed on both sides of the first protrusion,
The vertical wall is further formed with a third insertion portion that opens to the lock receiving portion side and into which the third protrusion is inserted,
The upper surface of the third projecting portion is in contact with the inner surface of the third insertion portion in a state where the electronic unit is attached to the upper surface of the case of the electrical junction box. The electronic unit mounting structure according to any one of the preceding claims. 5. The electrical connection box and the electronic unit each include a connector that fits together when the electronic unit is rotated around the first protrusion. The electronic unit attachment structure of any one of these. 6. The electronic unit according to claim 1, wherein a plurality of protrusions that suppress backlash of the electronic unit are provided on an upper surface of the case of the electrical junction box. Mounting structure.

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