JP2006331779A - Electrical component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure superior sealing characteristics by pressing a seal rib installed at a flange to a mounting object member superbly, even if the flange has warpage deformation between tightening places in the case the flange of a housing of a switching device is tightened and fixed to the mounting object member by a tightening means. <P>SOLUTION: Protrusion heights of two strips of seal ribs 18, 19 installed at the flange 3 of a housing 2 of a switching device 1 is made higher at a center than those of the tightening places with screws (tightening means) of both right and left sides. Then, in the case both the right and left sides are tightened and fixed to the mounting object member with the screws, even if the flange 3 is curved and deformed so that the center is floated, the seal ribs 18, 19 become contact with the mounting object member by an appropriate pressure force at their entire circumferences. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electrical component that is fastened and fixed to a mounting partner material by a fastening means such as a screw, and more particularly to a structure that seals between the mounting partner material.

  Recently, some sedan-type vehicles and one-box-type vehicles have adopted an electric lock system for the doors and back doors of the trunk room. In this automobile, for example, an electric locking device and an unlocking switch device are provided on the door side, and when the unlocking switch device is operated, the electric locking device is unlocked and the door can be opened.

  In the unlocking switch device, a flange is formed on the outer periphery of the housing, and the flange is fastened and fixed to the outer plate of the trunk room door or the back door by a plurality of screws. In this case, an opening is formed in the outer plate of the door, and the rear part of the unlocking switch device protrudes into the door through this opening and is electrically connected to the electric lock device arranged in the door. It has become so. In order to prevent rainwater from entering the door from the opening of the door outer plate, the flange between the unlocking switch device and the door outer plate is sealed.

Although it is not a switch apparatus, as a structure which seals between the base | substrate which provided the electrical element, and the attachment other material, there exists what was disclosed by patent document 1. FIG. This is a structure in which seal ribs are provided around the periphery of the base body, and the seal ribs are inserted into the packing provided on the mating material to be sealed.
JP-A-11-32145

  Also in the above-described trunk room door and back door unlocking switch device, a seal structure similar to the seal structure disclosed in Patent Document 1 is employed. That is, in the unlocking switch device, when a rubber cover having a seal rib is provided on the flange of the base, and the flange is fastened and fixed to the mating member by a plurality of screws, the seal rib is attached to the door outer plate. A seal structure in which the two are pressed to seal between them is employed.

  In the seal structure described in Patent Document 1, when the base is intermittently tightened and fixed to a mounting counterpart with a screw, the seal rib deeply penetrates into the packing at the screw tightening point. However, since the base body is elastically deformed and warped between the screws, the degree of biting of the seal rib into the packing is shallow at the portion between the screws and the seal may be insufficient. is there.

  Similarly, in the above-described unlocking switch device that is fixed to the door outer plate with a plurality of screws, the flange is warped and deformed so as to be lifted from the door outer plate between the screw tightening portions. As a result, between the screws, the pressing force of the seal rib against the door outer plate is insufficient, and the seal may be insufficient. In order to solve this problem, conventionally, a reinforcing plate made of an iron plate is provided on the flange, and the rigidity of the reinforcing plate prevents the flange from warping and deforming at a portion between the screws, so that the entire seal rib can be satisfactorily used. It was designed to be pressed against the outer plate. However, in this configuration, there is a problem in that the manufacturing cost increases because an extra steel plate reinforcing plate is required.

  The present invention has been made in view of the above circumstances, and an object thereof is to reliably seal the entire sealing rib against the mounting counterpart material without reinforcing the base body with the reinforcing plate. It is to provide an electrical component that can be used.

In order to achieve the above-described object, the present invention provides a base having an electric element with an attachment portion that is fastened and fixed by a fastening means at a plurality of locations on an attachment partner material, and the attachment on the back surface of the attachment portion. A seal rib made of an elastic material is provided so as to surround an opening formed in the counterpart material, and the attachment portion is fastened and fixed to the attachment counterpart material, whereby the seal rib is pressed against the attachment counterpart material and the attachment counterpart material In the electric part configured to seal between the mounting portion and the mounting portion, the protruding height of the seal rib is higher at a position farther from the vicinity of the tightening portion to the mounting partner material by the fastening means. It is characterized by that.
In this case, the tightening portion by the fastening means in the back surface of the mounting portion is formed as a seat portion protruding from the back surface, and the seal rib can protrude higher than the seat portion.

  In the invention of claim 1, since the protruding height of the seal rib is higher than the vicinity of the tightening portion by the fastening means, even if the flange is deformed in the direction away from the mounting counterpart material between the tightening portions, Since the height of the seal rib in that portion is high, the seal rib is excellent, that is, comes into contact with the mounting counterpart material with an appropriate pressing force, and exhibits good sealing performance.

  In the invention of claim 2, the tightening portion to the mounting counterpart material of the back surface of the flange is formed as a seat portion protruding from the back surface, so that the seal rib is not excessively crushed by the tightening force of the fastening means, Demonstrates good sealing performance.

  Hereinafter, an embodiment in which the present invention is applied to a switch device for unlocking a back door of a one-box car will be described with reference to the drawings. 1 to 3 show an unlocking switch device 1 as an electrical component. As shown in FIGS. 1 to 3, the housing 2 as a base body of the switch device 1 is formed in a horizontally long shape with a highly rigid plastic material such as polypropylene. The housing 2 includes a flange 3 as an attachment portion, and a front housing portion 4 and a rear housing portion 5 integrally formed on both front and rear surfaces of the flange 3. A switch element 6 such as a push button switch is provided. The front and rear housing parts 4 and 5 communicate with each other.

  Such an unlocking switch device 1 is attached to a back door of a one-box car. As shown in FIGS. 5 and 6, the unlocking switch device 1 is attached by tightening and fixing the flange 3 to the outer plate (attachment member) 7 of the back door with bolts 8 and nuts 9 as fastening means. Is done. In a state where the flange 3 is attached to the outer plate 7 of the back door, the front housing portion 4 is outside the outer plate 7, and the rear housing portion 5 is inserted through the opening 10 formed in the outer plate 7. It is in a state of protruding into the door back, in other words, in a state of being accommodated inside the back door.

  Of each surface of the housing 2, all or part of the lower surface of the front housing portion 4 outside the back door and the rear surface of the rear housing portion 5 inside the back door are open. Among them, the lower surface of the front housing portion 4 including the opening portion is entirely covered with a soft cover 11 made of an elastomer such as synthetic rubber, and the switch element 6 in the front housing portion 4 is connected to the soft cover 11. It is designed to be operated via. The soft cover 11 is integrally formed with the housing 2 by double molding (two-color molding).

  The rear surface of the rear housing portion 5 accommodated inside the back door electrically connects the switch element 6 on the housing 2 side to an electric lock device (not shown) provided in the back door. Therefore, it is closed by a substrate 13 to which a connector 12 and the like are attached. In addition, the opening part 10 projects the part of the housing 2 to the back side (inside the back door) of the mounting partner material in this way, and is an electric lock device (not shown) that is another electrical component on the mounting partner material side. To connect directly or via a lead wire.

  Now, on both the left and right sides of the flange 3 of the housing 2, through holes 14 for passing the bolts 8 are formed. Moreover, the part in which the through-hole 14 of both front and back surfaces of the flange 3 was formed is formed slightly higher than the front surface and the back surface, and the seat parts 15 and 16 are comprised. A sealing member 17 is attached to the peripheral portion of the back surface of the front and back surfaces of the flange 3 that is directed to the outer plate 7 of the back door so as to surround the rear housing portion 5 and the seat portions 16 on the left and right sides thereof. Yes.

  The seal member 17 is made of an elastic material such as an elastomer, and is integrally formed by double molding (two-color molding) with the housing 2. The seal member 17 is integrally formed with an inner seal rib 18 having a rectangular closed loop shape and an outer seal rib 19 outside the inner seal rib 18 and parallel to the inner seal rib 18. As shown in FIGS. 1 and 4, the heights of both the seal ribs 18 and 19 are set to a slightly lower constant dimension near the seat portions 16 on both the left and right sides, which are tightened portions by the bolts 8 and the nuts 9. The height is gradually increased as it goes to the central portion between the left and right seat portions 16 and is set to the highest fixed dimension at the central portion between the right and left seat portions 16.

  Here, the height h of both the seal ribs 18 and 19 near the seat portions 16 on the left and right sides is set to be, for example, 0.5 mm higher than the seat portion 16. The height H of 19 is set to be, for example, 0.8 mm higher than the seat portion 16. In FIGS. 1 and 4, the height difference between the seal ribs 18 and 19 is exaggerated.

  The unlocking switch device 1 configured as described above is attached to the outer plate 7 of the back door together with the garnish 20 as shown in FIGS. The garnish 20 is made of plastic, and the heads of the bolts 8 described above are embedded in the left and right sides thereof by insert molding. A bolt 21 integrated with the garnish 20 is fitted with a sealing bush 21 made of an elastomer such as synthetic rubber.

  At the time of attachment, the flange 3 is directed to the outer surface of the outer plate 7 by holding the housing 2 of the unlocking switch device 1 and fitting the rear housing portion 5 into the rectangular opening 20 formed in the outer plate 7. The through hole 14 of the flange 3 is aligned with the through hole 22 formed in the outer plate 7. Then, the garnish 20 is held, and the bolt 8 is passed through the through hole 14 of the housing 2 and the through hole 22 of the outer plate 7. Next, a nut 9 is screwed into the tip portion of the bolt 8 protruding to the back side of the outer plate 7, and the nut 9 is tightened. As a result, the housing 2 and the garnish 20 are fastened and fixed to the outer plate 7.

  At the same time, by tightening and fixing with the bolt 8 and the nut 9, the sealing bush 21 is sandwiched between the seat portion 16 of the housing 2 and the garnish 20 to seal between the two. Further, both seal ribs 18 and 19 of the housing 2 are pressed against the outer plate 7 to seal between them. This prevents rainwater from entering the back door through the through holes 14 and 22 and the opening 10.

  By the way, when the nut 9 is tightened, in the flange 3 of the housing 2, the tightening force directly acts on the portion where the seat portions 15 and 16 are formed, and the portion is tightened to the outer plate 7. . However, the portion between the forming portions of the left and right seat portions 15 and 16 does not directly receive such a tightening force, and is drawn into the tightening force of the forming portions of the seat portions 15 and 16. The flange 3 is slightly bent from the outer plate 7 at the center portion, but is warped and deformed in the floating direction.

  Then, if the projecting heights of both seal ribs 18 and 19 are the same all around, the pressing force on the outer plate 7 is insufficient in the middle part of the left and right seat portions 15 and 16. In addition, the seal may be insufficient. On the other hand, in the present embodiment, the projecting heights of the seal ribs 18 and 19 are not the same all around the circumference, but from the formation part of the seat parts 15 and 16 on both the left and right sides to the center part in the left and right direction considering the curvature of the flange 3 Since the seal ribs 18 and 19 are set so as to gradually increase as they go, there is no fear that the seal ribs 18 and 19 will be insufficiently pressed at the central portion in the left-right direction, and the outer plate 7 is pressed well over the entire circumference and exhibits a good sealing action. It becomes like this.

  Further, in this embodiment, the seat 16 is formed so as to protrude from the back surface of the flange 3, so that the tightening force by the bolt 8 and the nut 9 can be received by the seat 16, and the seal ribs 18 and 19 are excessive. It is not crushed, and this also provides a good sealing action.

The present invention is not limited to the embodiments described above and shown in the drawings, and can be expanded or changed as follows.
Any one of the seal ribs 18 and 19 is sufficient.
The seal member 17 is not limited to a configuration that is integrated with the flange 3 by double molding, but may be a configuration that is integrated by adhesion. Alternatively, an elastomer cover that covers the entire housing 2 may be provided, and the seal ribs 18 and 19 may be formed on the cover.
The electrical element provided in the housing is not limited to the switch.
The opening 10 is not necessarily limited to one that protrudes a part of the housing 2 to the back side of the attachment partner material, but to project the electrical component on the attachment counterpart material side to the housing side, or to the electrical component on the attachment counterpart material side. It may be for passing a lead wire for connection. In other words, the opening 10 is for connection between the electrical element on the housing side and other electrical components on the back side of the attachment counterpart.
The present invention is not limited to a switch device for unlocking a door back of an automobile, and may be applied to a switch device for unlocking a trunk door. In general, it can be widely applied to electrical parts that need to be sealed.

The bottom view of the switch apparatus for unlocking which shows one Embodiment of this invention Side view Rear view (A), (b), (c), (d), (e) is an expanded sectional view which follows the aa, bb, cc, dd, ee line of FIG. 1, respectively. Cross-sectional view of the back door attached to the outer panel Same vertical side view

Explanation of symbols

1 is an unlocking switch device (electric part), 2 is a housing (base), 3 is a flange (mounting part), 6 is a switch element (electric element), 7 is an outer plate (mounting material), 8 is a bolt ( Fastening members), 9 nuts (fastening members), 10 openings, 13 substrates, 15 and 16 seats, 17 seal members, 18 inner seal ribs, 19 outer seal ribs, 20 garnishes, and 21 bushings It is.

Claims (2)

A base having an electric element is provided with an attachment portion to be fastened and fixed to the attachment counterpart material by a fastening means at a plurality of locations, and an elastic material is provided on the back surface of the attachment portion so as to surround an opening formed in the attachment counterpart material. A seal rib made of metal is provided, and the attachment portion is fastened and fixed to the attachment counterpart material, so that the seal rib is pressed against the attachment counterpart material and seals between the attachment counterpart material and the attachment portion. Electrical components
An electrical component characterized in that the protruding height of the seal rib is higher at a position farther from the vicinity of a portion to be fastened to the attachment counterpart material by the fastening means. 2. The electricity according to claim 1, wherein a fastening portion of the attachment portion by the fastening means is formed as a seat portion protruding from the back surface, and the seal rib protrudes higher than the seat portion. parts.

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