JP2011148466A - Component assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a component assembly capable of preventing a part from falling without increasing the number of parts. <P>SOLUTION: The component assembly 1 includes a bolt block 3 and a cassette block 2 to which the bolt block 3 is attached. The cassette block 2 includes a lock arm 8 for engaging with the bolt block 3 and a regulating part 9 for preventing the bolt block 3 from falling. The regulating part 9 is formed in a cantilever plate shape and arranged to have a space from the lock arm 8. When engaging with the bolt block 3 and being unengaged from the bolt block 3, the regulating part 9 bends with the lock arm 8 and pushes back the lock arm 8 to a side of the bolt block 3 as being pushed by the lock arm 8 bending to a side to move away from the bolt block 3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a component assembly including a component and a component mounting member to which the component is mounted, and relates to a component assembly in which a component is mounted by locking a lock arm provided on the component mounting member to the component. is there.

  FIG. 10 is a cross-sectional view showing a conventional component assembly. The component assembly 201 constitutes an electrical junction box mounted on an automobile (see Patent Document 1). The electrical junction box is for supplying power and transmitting signals to an electronic device mounted on the automobile.

  The component assembly 201 includes a bolt block 203 as a component, a cassette block 202 as a component mounting member, and a pair of spacers 204 for preventing the bolt block 203 from falling off.

  The bolt block 203 is provided with a bolt 16 provided with a head portion 17 and a shaft portion 18 and a synthetic resin support member 230 to which the bolt 16 is attached. The bolt 16 is attached to the support member 230 such that the head portion 17 is embedded in the support member 230 and the shaft portion 18 protrudes from the upper surface 235 of the support member 230. The shaft portion 18 is a male screw formed in a columnar shape and having a spiral groove cut on the outer periphery. The shaft portion 18 is passed through the through hole 51 of the bus bar 50 and the through hole 61 of the terminal 60 attached to the end of the power line, and the nut 19 is screwed. In addition, the bus bar 50 and the terminal 60 are electrically connected to each other by pressing the shaft portion 18 through the through holes 51 and 61 and screwing the nut 19 into the shaft portion 18.

  The cassette block 202 is attached to a frame that forms a case of the electrical junction box, and is formed of a synthetic resin. The cassette block 202 includes a pair of mounting holes 220 into which the support member 230 of the bolt block 203 is inserted in the direction of the arrow K and a pair of protruding locking portions 239 provided on the side surfaces of the support member 230. A lock arm 208 and a plurality of outer walls 226 and 227 disposed outside the attachment hole 220 are provided. The pair of lock arms 208 includes an arm portion 280 extending in a cantilevered manner from the lower end surfaces of the inner walls 222 and 224 facing each other that form the mounting hole 220, and the mounting hole 220 from the tip of the arm portion 280. And a lock portion 281 protruding toward the inside. The pair of lock arms 208 fixes the bolt block 203 by being engaged with a pair of engagement portions 239 provided on the support member 230.

  The pair of spacers 204 includes a space S1 between one lock arm 208 and the outer wall 226 and a space between the other lock arm 208 and the outer wall 227 after the bolt block 203 is attached to the cassette block 202. The bolt block 203 is prevented from falling off by restricting that the pair of lock arms 208 bend to the side away from the support member 230 (indicated by a two-dot chain line in FIG. 10).

  Such a component assembly 201 is attached to the frame of the electrical junction box after the bolt block 203 is attached to the cassette block 202 and a pair of spacers 204 are attached to the spaces S1 and S2 of the cassette block 202. . As described above, the bus bar 50 and the terminal 60 are overlapped with the upper surface 235 of the support member 230, and the nut 19 is screwed into the shaft portion 18 through the through hole 51 of the bus bar 50 and the through hole 61 of the terminal 60. Is done.

  Further, when the nut 19 is screwed to the shaft portion 18, an external force (indicated by an arrow F) in a direction in which the bolt block 203 drops off from the mounting hole 220 of the cassette block 202 is received. As a result, the pair of lock arms 208 tries to bend in the direction in which the engagement with the pair of engagement portions 239 is released, as indicated by the two-dot chain line. Since 208 is restricted from bending to the side away from the support member 230, the bolt block 203 is prevented from falling off the mounting hole 220 of the cassette block 202.

JP-A-6-276648

  However, in the conventional component assembly 201 described above, since the cassette block 202 and the pair of spacers 204 are separate components, there is a problem in that the number of components increases and the component cost and component assembly cost increase. It was. The above-described problem also occurs in other parts assemblies including parts other than the bolt block 203, parts mounting members other than the cassette block 202, and spacers.

  Therefore, an object of the present invention is to provide a component assembly that can prevent a component from dropping without increasing the number of components.

  In order to achieve the above object, the invention described in claim 1 is a component assembly including a component and a component mounting member to which the component is mounted. The component mounting member is locked to the component. And a restricting portion for preventing the component from falling off, and the restricting portion is disposed at a distance from the lock arm and is locked to the component. When the lock arm is released, the lock arm is bent to the side away from the component, so that the lock arm is bent together with the lock arm to push the lock arm back to the component side. It is a component assembly.

  According to a second aspect of the present invention, in the first aspect of the present invention, the restricting portion extends in a plate shape along the longitudinal direction of the lock arm, and a portion facing the tip of the lock arm is free. It is formed in the shape of a cantilever plate with an end.

  The invention described in claim 3 is the invention described in claim 1 or 2, wherein the component is a synthetic resin support member and a male screw to which the female screw is screwed and attached to the support member. And a bolt block provided with.

  According to the first aspect of the present invention, the component mounting member is provided with a lock arm that is locked to the component, and a restricting portion that prevents the component from falling off. The lock arm is disposed by being spaced from the lock arm and pressed by the lock arm that bends away from the component when the component is engaged with the component and when the component is released from the component. The lock arm is bent together with the arm so as to push the lock arm back to the component side. Therefore, when the component receives an external force in the direction of dropping from the component mounting member, the amount of bending of the lock arm is reduced by the restricting portion. It is possible to prevent the lock arm from being released from being locked. In addition, when attaching the component to the component mounting member, since the restricting portion is arranged at a distance from the lock arm, the initial stage of the component mounting operation, that is, until the lock arm is bent and contacts the restricting portion. In the stage, the component can be attached to the component attachment member with the same force as when the restriction portion is not provided. In the later stage of the component mounting operation, that is, in the stage where the lock arm is bent to the maximum in order to be locked to the component, not only the lock arm but also the restricting portion must be bent, so the restricting portion is provided. However, in this latter stage, there is a momentum that moved the parts toward the mounting position in the earlier stage, so that the lock arm and the restricting part can be easily bent. Can do. Therefore, it is possible to provide a component assembly that can prevent the component from falling off without increasing the number of components.

  According to the invention described in claim 2, the restricting portion extends in a plate shape along the longitudinal direction of the lock arm, and a cantilever plate shape in which a portion facing the tip of the lock arm is a free end. Therefore, it is possible to provide a component assembly that can prevent the component from falling off without increasing the number of components.

  According to the invention described in claim 3, since the component is a bolt block provided with a synthetic resin support member and a male screw attached to the support member and screwed with the female screw. When the external thread is subjected to an external force in the direction in which the component is detached from the component mounting member when the female screw is screwed onto the male screw, the amount of flexure of the lock arm can be reduced by the restricting portion. It is possible to prevent the stop from being released. Therefore, it is possible to provide a component assembly that can prevent the component from falling off without increasing the number of components.

It is a perspective view which shows the electrical junction box provided with the components assembly of this invention. It is a cross-sectional perspective view which shows the component attachment member which comprises the component assembly shown by FIG. It is a perspective view which shows the components which comprise the component assembly shown by FIG. FIG. 4 is a cross-sectional perspective view showing a component assembly in which the component shown in FIG. 3 is attached to the component attachment member shown in FIG. 2. It is sectional drawing along the AA line in FIG. It is a figure explaining a mode that a component is attached to the component attachment member shown by FIG. 5, and is sectional drawing which shows a mode that a component is inserted in the attachment hole of a component attachment member. FIG. 6 is a diagram for explaining a state in which a part is attached to the part attachment member shown in FIG. 5, and a cross section showing a state in which the lock arm of the part attachment member rides on the part locking part and bends away from the part FIG. It is a figure explaining a mode that a part is attached to the part attachment member shown in FIG. 5, and the lock arm of a part attachment member rides on the latching | locking part of a part, and bends in the side away from a part, and a regulation part is bent. It is sectional drawing which shows a mode that it is. It is sectional drawing which shows a mode that the external force is applied to the components of the component assembly shown by FIG. It is sectional drawing which shows the conventional component assembly.

  A component assembly according to an embodiment of the present invention will be described with reference to FIGS. The component assembly 1 of the present invention is mounted on an automobile and constitutes an electrical connection box 10 that supplies power and transmits signals to an electronic device mounted on the automobile. 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 FIG. 1, the electrical junction box 10 includes a case made of synthetic resin and a plurality of components such as a fuse 14, a relay 15, a bolt block 3, and a bus bar 50 accommodated in the case. Yes. The case includes a case main body 7 to which the above-described plurality of components are attached, an upper cover (not shown) attached to the upper surface 4a of the case main body 7, a lower cover 5 attached to the lower surface of the case main body 7, and a case main body 7 And a side cover 6 attached to the side surface of the head.

  The case body 7 includes a frame body 4 formed in a frame shape by a plurality of peripheral walls 41 constituting the outer shell and a plurality of partition walls 43 partitioning the inside of the peripheral walls 41, and the frame body 4 is formed separately. The plurality of cassette blocks 2, 11, and 12 are attached to the frame body 4. Of the plurality of peripheral walls 41, a peripheral wall 41 facing the cassette block 2 described later is provided with a notch 42, and the side cover 6 described above is attached to the peripheral wall 41 so as to cover the notch 42. It is done.

  The plurality of cassette blocks 2, 11, and 12 are for mounting the above-described plurality of parts. For example, the cassette block 2 is provided with a mounting hole 20 for attaching the bolt block 3. Further, the cassette block 11 is provided with a fuse attachment portion for attaching the fuse 14 and a bus bar attachment portion for attaching the bus bar 50. Further, the cassette block 12 is provided with a bus bar mounting portion for mounting the bus bar 50, a connector receiving portion 13 for fitting with a connector of a wire harness, and the like.

  The bus bar 50 (a part of which is shown in FIG. 9) is a wiring member obtained by pressing a metal plate. In this bus bar 50, a fuse 14, a relay 15, a connector fitted to the connector receiving portion 13, and a terminal 60 (a part of which is shown in FIG. 9) attached to the end of the power supply line are predetermined. Electrical connection to each other according to the pattern. The electrical connection box 10 includes a plurality of bus bars 50.

  Further, the bolt block 3 described above corresponds to a “component” of the present invention, and the cassette block 2 described above corresponds to a “component mounting member” of the present invention. In addition, as shown in FIGS. 4 and 5, the one in which the bolt block 3 as the “component” is attached to the cassette block 2 as the “component mounting member” is referred to as a “component assembly” in the present invention, Reference numeral 1 is attached. That is, the electrical junction box 10 of the present invention includes the component assembly 1. Hereinafter, the configuration of the component assembly 1 will be described.

  The component assembly 1 includes a bolt block 3 as a “component” and a cassette block 2 as a “component mounting member” to which the bolt block 3 is attached.

  As shown in FIG. 3, the bolt block 3 is provided with a bolt 16 provided with a head portion 17 and a shaft portion 18, and a synthetic resin support member 30 to which the bolt 16 is attached. . The bolt block 3 is a component for electrically connecting the terminal 60 attached to the end of a power line connected to a battery of an automobile and the bus bar 50 described above.

  The bolt 16 is attached to the support member 30 such that the head portion 17 is embedded in the support member 30 and the shaft portion 18 protrudes from the upper surface 35 of the support member 30. The shaft portion 18 is a “male screw” formed in a columnar shape and having a spiral groove formed on the outer periphery. The shaft portion 18 is passed through the through hole 51 of the bus bar 50 and the through hole 61 of the terminal 60 attached to the end of the power line, and the nut 19 as a “female screw” is screwed together. In addition, the bus bar 50 and the terminal 60 are electrically connected to each other by pressing the shaft portion 18 through the through holes 51 and 61 and screwing the nut 19 into the shaft portion 18.

  The support member 30 is formed in a block shape, and includes an upper surface 35 from which the shaft portion 18 protrudes, a lower surface 36 located on the opposite side of the upper surface 35, and four side surfaces 31, 32, 33, 34. Have. Of the four side surfaces 31, 32, 33, 34, the side surface 32 and the side surface 34 positioned on the opposite side of the side surface 32 are respectively provided with a concave groove 37, a pair of contact walls 38, A stop portion 39 is provided. The concave groove 37 extends in a concave shape from the upper surface 35 to the lower surface 36. The pair of abutting walls 38 are erected in a plate shape from the position where the concave grooves 37 are positioned between the ends of the side surfaces 32, 34 near the lower surface 36. The locking portion 39 is provided in a protruding shape at a position between the bottom surface of the concave groove 37 and the pair of contact walls 38.

  The cassette block 2 is made of synthetic resin. As shown in FIGS. 2 and 3, the cassette block 2 includes a mounting hole 20 surrounded by four inner walls 21, 22, 23, and 24 into which the support member 30 is inserted in the arrow K direction, and a support member 30. The pair of lock arms 8 that are engaged with the pair of engagement portions 39 provided on the side surfaces 32 and 34, the pair of restricting portions 9 for preventing the bolt block 3 from being detached from the mounting hole 20, and the above-described configuration. A locking portion 25 that locks to the frame 4 is integrally provided.

  The pair of lock arms 8 includes an arm portion 80 extending in a cantilevered manner from the lower end surfaces of the inner walls 22 and 24 facing each other, and a protrusion from the tip of the arm portion 80 toward the inside of the mounting hole 20. And a lock portion 81 protruding in a shape. The “lower end surfaces of the inner walls 22, 24” mean the end surfaces of the inner walls 22, 24 positioned on the lower side in the paper plane in the electrical junction box 10 shown in FIG. 1.

  4 to 8, the bolt block 3 is inserted into the mounting hole 20 along the arrow K direction, and the end surface near the upper surface 35 of the abutting wall 38 is in contact with the lower end surfaces of the inner walls 22 and 24. The end surface near the lower surface 36 of the locking portion 39 comes into contact with the lock portion 81 of the lock arm 8, and is attached to the cassette block 2. Further, in a state where the bolt block 3 is attached to the cassette block 2, the support member 30 is positioned in the mounting hole 20, and the shaft portion 18 is positioned outside the mounting hole 20.

  Further, “the lock arm 8 is locked to the locking portion 39 of the bolt block 3” means that the lock portion 81 of the lock arm 8 comes into contact with the end surface near the lower surface 36 of the locking portion 39, that is, the lock portion 81. Is hooked to the locking portion 39. Further, when the lock arm 8 is locked to the locking portion 39, as shown in FIGS. 7 and 8, as the insertion of the bolt block 3 into the mounting hole 20 proceeds, the lock portion 81 moves to the locking portion 39. A state before the arm portion 80 bends as the arm portion 80 bends in a direction away from the bottom surface of the concave groove 37 of the support member 30 and the lock portion 81 climbs over the top of the locking portion 39. The lock portion 81 comes into contact with the end surface near the lower surface 36 of the locking portion 39 and is locked to the locking portion 39.

  The pair of restricting portions 9 are arranged on the outside of the pair of lock arms 8, that is, on the side farther from the mounting hole 20 than the pair of lock arms 8, with a space from each lock arm 8. Further, the pair of restricting portions 9 are formed in a cantilever plate shape extending in a plate shape along the longitudinal direction of the lock arm 8 and having a portion facing the tip of each lock arm 8 as a free end. The “tip of the lock arm 8” means a free end away from the inner walls 22, 24 of the arm portion 80.

  Such a pair of restricting portions 9 are used when the lock arm 8 is engaged with the engaging portion 39 of the bolt block 3, that is, when the bolt block 3 is attached to the cassette block 2, and when the lock arm 8 is attached to the bolt block 3. When the lock block 39 is unlocked, that is, when the bolt block 3 is removed from the cassette block 2, the lock block 8 is pushed by the pair of lock arms 8 that are bent away from the bottom surface of the groove 37. It bends together with the arm 8 and pushes the lock arm 8 back to the bottom surface side of the concave groove 37.

  Such a component assembly 1 is attached to the frame body 4 after the bolt block 3 is attached to the cassette block 2. As described above, the bus bar 50 and the terminal 60 are overlapped with the upper surface 35 of the support member 30, and the nut 19 is screwed into the shaft portion 18 that is passed through the through hole 51 of the bus bar 50 and the through hole 61 of the terminal 60. Is done. Further, the side cover 6 described above is removed from the peripheral wall 41 for facilitating the work of fastening the nut 19 and attached to the peripheral wall 41 after the fastening work of the nut 19 is completed.

  Further, as shown in FIG. 9, when the nut 19 is screwed, that is, fastened, to the shaft portion 18, an external force (indicated by an arrow F) in a direction in which the bolt block 3 is dropped from the mounting hole 20 of the cassette block 2. ) As a result, the pair of lock arms 8 tries to bend in the direction in which the engagement with the pair of engagement portions 39 is released, that is, the side away from the bottom surface of the concave groove 37. The portion 9 abuts against the pair of lock arms 8 to restrict the lock arms 8 from being bent away from the bottom surface of the groove 37. That is, when the pair of lock arms 8 pushes the pair of restricting portions 9, the restricting portions 9 push the lock arm 8 back to the bottom surface side of the concave groove 37, thereby locking the lock arm 8 to the engaging portion 39. State is maintained. Therefore, the bolt block 3 is prevented from falling off the mounting hole 20 of the cassette block 2.

  When assembling the electrical junction box 10 described above, first, components are attached to the plurality of cassette blocks 2, 11, and 12, respectively. Next, the cassette blocks 2, 11, 12 to which the parts are attached are attached to the frame body 4. Then, the connector of the wire harness is fitted into the connector receiving portion 13, and the power supply terminal 60 is electrically connected to the bus bar 50 by the shaft portion 18 and the nut 19. Finally, the electrical connection box 10 is assembled by attaching the upper cover, the lower cover 5 and the side cover 6 to the frame body 4.

  Further, when the bolt block 3 is attached to the cassette block 2, since the restricting portion 9 is arranged at a distance from the lock arm 8, the initial stage of the attaching operation of the bolt block 3 shown in FIGS. That is, in the stage until the lock arm 8 is bent and abuts against the restriction portion 9, the bolt block 3 can be inserted into the mounting hole 20 with the same force as when the restriction portion 9 is not provided. In the latter stage of the mounting operation of the bolt block 3 shown in FIG. 8, that is, the stage in which the lock arm 8 is bent to the maximum in order to engage with the engaging portion 39 of the bolt block 3, not only the lock arm 8 but also Since the restricting portion 9 must also be bent, a larger force is required than in the case where the restricting portion 9 is not provided. In this later stage, the bolt block 3 is directed toward the mounting hole 20 in the initial stage. Therefore, the lock arm 8 and the restricting portion 9 can be easily bent.

  As described above, in the present invention, by providing the restricting portion 9 integrally with the cassette block 2, the conventionally used spacer can be eliminated, so that the bolt block 3 can be increased without increasing the number of parts. Thus, it is possible to provide the component assembly 1 that can prevent the drop-off and the low-cost electrical junction box 10 with a small number of components.

  In the above-described embodiment, the component assembly 1 including the bolt block 3 as the “component” and the cassette block 2 as the “component mounting member” has been described as an example. The assembly may include a “component” other than the bolt block 3 and a “component mounting member” other than the cassette block 2. For example, the “component mounting member” may be the case body 7 having a configuration in which the frame body 4 and the cassette blocks 2, 11, and 12 are integrally provided. Further, the “component assembly” of the present invention may not constitute an electrical junction box.

  In the above-described embodiment, a pair of the lock arm 8 and the restricting portion 9 are provided. However, in the “component assembly” of the present invention, at least one lock arm 8 and the restricting portion 9 are provided. It should be.

  In the embodiment described above, the locking portion 39 of the bolt block 3 is provided in a protruding shape. However, in the present invention, the locking portion 39 of the bolt block 3 is locked to the lock portion 81 of the lock arm 8. Possible recesses or through holes may be used. In the embodiment described above, the lock portion 81 of the lock arm 8 is provided in a protruding shape. However, in the present invention, the lock portion 81 of the lock arm 8 can be locked to the locking portion 39 of the bolt block 3. It may be a concave or through hole.

  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.

1 Component assembly 2 Cassette block (component mounting member)
3 Bolt block (parts)
8 Lock arm 9 Restriction part 18 Shaft part (Male thread)
19 Nut (Female thread)
30 Support member

Claims (3)

In a component assembly comprising a component and a component mounting member to which the component is mounted,
The component mounting member is provided with a lock arm that is locked to the component, and a restricting portion for preventing the component from falling off,
The restricting portion is disposed at a distance from the lock arm, and is pushed by the lock arm that bends away from the part when the part is locked to the part and when the part is released from the part. Accordingly, the component assembly is formed so as to bend together with the lock arm and push the lock arm back to the component side. The restriction portion extends in a plate shape along a longitudinal direction of the lock arm, and is formed in a cantilever plate shape in which a portion facing the tip of the lock arm is a free end. The component assembly according to 1. The said component is a bolt block provided with the supporting member made from a synthetic resin, and the external thread which is attached to this supporting member and the internal thread is screwed together, The Claim 1 or Claim 2 characterized by the above-mentioned. Parts assembly.

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