JP2012139916A - Component mounting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a component mounting structure in which mounting man-hours are reduced, a mounting state is stable without a play, and a position from the surface of a resin member can be also freely designed.SOLUTION: In the component mounting structure for mounting the component from the back surface side of the resin member, the resin member includes an opening larger than the outer shape of the component and penetrating the back surface from the front surface, and frame like vertical walls extended along the edge of the opening in the back surface direction. Pawls facing each other inward and a management surface provided at end faces of the vertical walls and abutting on the component to be inserted from the back surface side in a position different from a position where pawls of the vertical walls facing each other are provided in the opposed vertical walls among the vertical walls. The component has a pair of outward pawls engaged with the inward claws, an abutting surface abutting on the management surface, and a pair of pressing pieces which sandwich the vertical wall on which the management surface is formed from the outside to the inside and which is continuously formed outside the abutting surface.

Description

  The present invention relates to a mounting structure for mounting parts such as a switch for operating electrical components such as a rear wiper and a power window to a resin member such as an instrument panel or a trim inside a door, particularly from the back side of the resin member. The present invention relates to a mounting structure for mounting parts.

  As a method of attaching the parts such as the switch to the resin member such as a panel or a trim, a method of attaching from the surface of the resin member has been performed. For example, a description will be given with reference to FIG. The resin member 100 is provided with an opening 101 for attaching components. The component 103 is provided with sheet metal claws 104a and 104b on both side surfaces. The component 103 is inserted into the opening 101 from the front side of the resin member 100, and is fixed by bending the sheet metal claws 104a and 104b as shown by arrows on the back side.

  Such an attachment structure seems to be easy to install, but requires a step of bending the sheet metal claws 104a and 104b, and the backlash occurs after installation due to the tolerance of the diameter of the opening 101 and the outer diameter of the component 103. There was a problem to do. Further, the positional relationship between the opening 101 and the component 103 is not constant within a tolerance range, and it is necessary to arrange a bezel 105 for hiding the dividing line around the component. For this reason, it has the problem of an increase in the number of parts.

  In view of this, there has been proposed a mounting structure that requires a small number of mounting steps and high mounting accuracy with the opening (Patent Document 1). With reference to FIG. 7, the mounting structure of Patent Document 1 will be described. The component 205 is attached from the back side of the resin member 201. A rib member 209 extends from the periphery of the opening 208 toward the back side. The rib member 209 is formed with an engagement hole 213 and a lower end peripheral portion 214.

  The component 205 to be attached is inserted from the back surface side to the front side of the resin member 201, the engagement protrusion 212 provided on the outer periphery of the base end portion 205b engages with the engagement hole 213, and the shoulder portion of the base end portion 205b. Is brought into contact with the lower edge portion 214 of the rib member 209 to complete the attachment. The component 205 is configured to prevent the resin member 201 from coming off to the back side by engagement with the engagement protrusion 212 and the engagement hole 213, and with the contact between the shoulder portion of the base end portion 205 b and the lower end peripheral portion 214, The stopper of the resin member 201 to the surface side is configured.

  In such a structure, since the mounting is completed only by the insertion operation from the back side of the resin member 201, the number of mounting steps is reduced. In addition, the resin member 201 and the component 205 can be fixed more closely, and the gap between the opening 208 of the resin member 201 and the outer periphery of the component 205 can be kept relatively constant. Therefore, the secant can be formed as a part of the design, and a decorative part such as a bezel is not required.

JP 10-264683 A (Patent No. 3596224)

  However, in the mounting structure of Patent Document 1, since the engagement hole 213 (lateral hole) is formed in the rib member 209 extending on the back surface side of the opening 208, a slide mold is necessary as a mold for forming the resin member 201. It becomes. That is, the mold is expensive to produce. Further, since the slide mold is established in the mold, the position of the reinforcing rib provided around the engaging portion is restricted. This is because there is a possibility that the rib member 209 extended toward the back side of the opening 208 may not be sufficiently reinforced, and a stable operation feeling cannot be obtained when the user operates the component 205 attached. Alternatively, there may be a problem that the component 205 attached due to damage to the rib member 209 falls to the back side of the resin member 201.

  In addition, the component 205 is restricted from being engaged / abutted only on the inside of the opening 208 with respect to the rib member 209 provided on the resin member 201. That is, the movement of the component 205 is not restricted within the range of the gap generated between the opposing rib members 209. Accordingly, there is a possibility that the part 205 moves in this range and a slight backlash occurs.

  The present invention has been made in view of the above problems, and has a structure in which an engagement hole is not used when a component is attached to a resin member, and the engagement portion on the resin member side can be freely reinforced. The present invention provides a mounting structure for a resin member and a part that can more firmly regulate the part attached to the resin member.

More specifically, the component mounting structure of the present invention is:
A component mounting structure for mounting a component to the resin member from the back side,
In the resin member,
An opening that is larger than the outer shape of the component and penetrates from the front surface to the back surface;
Along with the edge of the opening is provided with a frame-like vertical wall extending in the back surface direction,
Among the vertical walls, the opposing vertical walls are
Nails facing inward,
A management surface that is provided at an end surface of the vertical wall at a position different from the position at which the claw of the opposing vertical wall is provided, and that comes into contact with the component inserted from the back side;
The parts include a pair of outward claws that engage the claws;
A contact surface that contacts the management surface;
A vertical wall provided with a management surface is sandwiched from the outside to the inside, and has a pair of pressing pieces formed continuously on the outside of the contact surface.

  The component mounting structure of the present invention can complete the mounting by one operation of inserting a component from the resin member back side.

  In addition, since the through hole is not used in the engaging portion between the resin member and the part, it is easy to process and form the resin member or the part.

  Further, since a slide mold is not used, the degree of freedom in forming ribs for reinforcement is high. Accordingly, the strength of the engagement portion formed on the resin member can be sufficiently increased, and the stability of the operational feeling and the use durability are improved.

  In addition, the part is not only restricted from the inside of the opening provided in the resin member, but also the part itself restricts the engaging portion of the resin member from the outside to the inside, so the positional relationship between the resin member and the part is closer. Therefore, even a slight backlash does not occur. Therefore, the dividing line between the resin member and the component is stable and can be used as a design, so a decorative component such as a bezel is not necessary. Since this allows the components to be mounted without having a structure protruding from the surface of the resin member, a flash design can be constructed and the appearance can be improved.

It is a figure which shows the outline of the component attachment structure of this invention. It is a figure which shows the cross section which attached components to the resin member. It is a figure which shows the partial expansion of FIG. It is a figure which shows the cross section of the other part at the time of attaching components to the resin member. It is the figure seen from the resin member surface in the state attached to components and the resin member. It is a figure which shows the example of the conventional component attachment structure. It is a figure which shows the other example of the conventional component attachment structure.

  The present invention will be described below with reference to the drawings. The following description exemplifies an embodiment of the present invention, and the following embodiment may be modified without departing from the gist of the present invention.

  FIG. 1 shows a state in which components are inserted from the back side of the resin member. The component mounting structure 1 of the present invention includes a resin member 2 and a component 3. The resin member 2 is not particularly limited by an instrument panel inside the vehicle, a trim inside the door, or the like. The component 3 is mainly a switch for switching various electrical components, but is not particularly limited. In the following description, the component 3 to be mounted is described as a swing type switch for the sake of explanation. Needless to say, the present invention is not limited to this switch.

  The resin member 2 is provided with an opening 5 for attaching the component 3. The shape of the opening 5 is not particularly limited, but generally a substantially rectangular shape is frequently used. The opening 5 is a through hole penetrating from the front surface 2 f to the back surface 2 b of the resin member 2.

  A frame-like vertical wall 6 extends from the periphery of the opening 5 on the back surface 2b of the resin member 2 in a direction from the front surface 2f side of the resin member 2 toward the back surface 2b side. Forming the vertical wall 6 in a frame shape is preferable because the strength of the vertical wall 6 can be increased. Here, the frame shape does not have to be a completely closed frame, and a part thereof may be interrupted. Even if a part is interrupted, there may be no problem in strength depending on the size of the part 3 to be attached and the thickness of the resin member 2, or by providing other reinforcing ribs to the vertical wall 6, This is because sufficient strength can be obtained.

  Of the vertical walls 6, claws 8 a and 8 b are formed on a pair of opposing vertical walls 6 a and 6 b facing inward. This is an engaging claw with the part 3 to be attached. The reason why the claws 8a and 8b are provided on the pair of opposing vertical walls 6a and 6b is to engage the component 3 from both sides. Therefore, you may provide the nail | claw for engagement besides this.

  Moreover, the management surfaces 9a and 9b are provided on the end surface of the vertical wall at a position different from the position of the vertical wall 6 provided with the claws 8a and 8b. The management surfaces 9 a and 9 b are surfaces that determine the fixing position of the component 3. In particular, it is a surface that determines at which position the component is fixed from the front surface 2 f side to the back surface 2 b side of the resin member 2.

  Since the management surfaces 9a and 9b need to be formed with high accuracy from the front surface 2f (back surface 2b) of the resin member 2, it is preferable to form the management surfaces 9a and 9b at positions close to the back surface 2b of the resin member 2. The fact that it is far from the back surface 2b is because it is far from the main flow when the resin flows in the mold, and the positional accuracy may not be obtained.

  Accordingly, the pair of management surfaces 9a and 9b and the pair of claws 8a and 8b provided at different positions of the pair of vertical walls 6a and 6b facing each other have the management surfaces 9a and 9b on the back surface 2b side of the resin member 2. The claws 8a and 8b are arranged at positions farther from the back surface 2b than the management surfaces 9a and 9b.

  The resin member 2 is provided with a reference surface 10 in the vertical and horizontal directions within the back surface 2b (front surface 2f) of the resin member 2 not only at the periphery of the opening 5 but also at a position away from the opening 5. That is, the reference plane 10 is formed by vertical and horizontal ribs. The reference surface 10 is a surface formed with high accuracy in relation to the center of the opening 5. Therefore, the resin member 2 is provided with management surfaces 9a and 9b for regulating the distance from the back surface 2b (the front surface 2f) of the component 3 to be attached, and a reference surface 10 for regulating the vertical and horizontal positions of the opening 5. It is desirable that the reference surface 10 be formed such that the vertical and horizontal ribs become wider at the base of the vertical and horizontal ribs. This is because it is easy to fit the reference surface 10 from the component 3 side.

  Further, a reinforcing rib 11 can be formed around the vertical wall 6. In the figure, reference numeral 11 is given to one reinforcing rib as a representative. Such reinforcing ribs 11 not only increase the strength of the vertical wall 6 but also contribute to improving the strength of the resin member 2 itself. For example, if a power window operation switch having the component mounting structure 1 of the present invention is disposed near the inner handle of the door, a synergistic effect of reinforcement can be obtained.

  On the other hand, the part 3 to be attached is provided with a pair of outward claws 20a and 20b that engage with the claws of the vertical wall 6 in the main body portion. In FIG. 1, the claw 20b is not visible. When the component 3 is inserted into the opening 5 of the resin member 2 from the back surface 2b side, the pair of outward claws 20a and 20b and the pair of inward claws 8a and 8b on the vertical wall 6 side are engaged. In addition, the resin member 2 is prevented from coming off to the back surface 2b side. That is, the component 3 does not fall out from the front side to the back side of the resin member 2 by this engagement.

  FIG. 2 shows a cross section of the engaging portion when the component 3 is inserted and fixed to the resin member 2. In FIG. 1, it is sectional drawing of AA. A pair of inwardly directed claws 8a and 8b are formed at the tips of the opposing vertical walls 6a and 6b. Further, outwardly facing claws 20a and 20b are formed in the main body portion of the component 3, and engage with the inwardly directed claws 8a and 8b formed at the tips of the vertical walls 6a and 6b. By this engagement, the component 3 does not fall out to the back side of the resin member 2.

  Please refer to FIG. 1 again. The main body portion of the component 3 is also provided with contact surfaces 21a and 21b that contact the management surfaces 9a and 9b provided on the resin member 2 side. FIG. 3 shows an enlarged view of FIG. The contact surfaces 21 a and 21 b are formed integrally with the main body portion of the component 3. Since the management surfaces 9 a and 9 b are formed as a pair on the opposing vertical walls 6 a and 6 b, the contact surfaces 21 a and 21 b provided on the component 3 are also formed as a pair on the left and right side surfaces of the component 3.

  In addition, pressing pieces 22a and 22b are formed continuously on the outside of the contact surfaces 21a and 21b. In FIG. 3, only a part of the pressing piece 22b is visible. The pressing pieces 22a and 22b embrace the vertical walls 6a and 6b formed with the management surfaces 9a and 9b with which the contact surfaces 21a and 21b come into contact from the outside to the inside. The pressing pieces 22a and 22b are formed on both outer sides of the pair of contact surfaces 9a and 9b. Therefore, when viewed from the part 3, the pressing pieces 22 a and 22 b sandwich the frame-like vertical wall 6 of the resin member 2 from the outside. FIG. 4 shows a cross-sectional view of the management surfaces 9a and 9b and the contact surfaces 21a and 21b. This is the BB cross section of FIG.

  The management surfaces 9a and 9b are formed at the ends of the vertical walls 6a and 6b which are lower than the vertical walls 6a and 6b where the engaging claws 8a and 8b shown in FIG. 2 are formed. On the other hand, the contact surfaces 21 a and 21 b formed integrally with the component 3 main body come into contact with the management surfaces 9 a and 9 b when the component 3 is inserted and fixed in the opening 5, and from the back surface 2 b of the resin member 2 to the surface. It constitutes a stopper in the 2f direction.

  Further, pressing pieces 22a and 22b are formed on the outer sides of the contact surfaces 21a and 21b so as to be continuous with the contact surfaces 21a and 21b. The pressing pieces 22a and 22b are provided as a pair as the component 3 outside the left and right contact surfaces 21a and 21b. In addition, inclined surfaces (taper surfaces) 23a and 23b are formed at the tips of the pressing pieces 22a and 22b from the outside toward the inside.

  The component 3 must be engaged with the claws 8 a and 8 b of the vertical wall 6 and the claws 20 a and 20 b of the component 3 in order to be engaged with the resin member 2. When the component 3 is inserted into the opening 5 from the back surface 2b side, the claws 8a and 8b of the vertical wall 6 get over the claws 20a and 20b of the component 3 to complete the engagement. At this time, the vertical wall 6 itself is deformed outward. Then, the vertical walls 6a and 6b on which the management surfaces 9a and 9b are formed are also deformed outward.

  That is, the pressing pieces 22a and 22b must sandwich the vertical walls 6a and 6b deformed outward from the outside. Inclined surfaces 23a and 23b formed at the tips of the pressing pieces 22a and 22b from the outside to the inside make the vertical walls 6a and 6b deformed to the outside easily sandwiched from the outside and facilitate insertion of the component 3. Is provided.

  The pressing pieces 22a and 22b sandwich the vertical walls 6a and 6b from the outside toward the inside. Therefore, since the frame-shaped vertical wall 6 is sandwiched between the pair of pressing pieces 22a and 22b, the part 3 is not restricted only from the inside of the vertical wall 6, but the part 3 itself is restricted from the outside. The part 3 hardly generates play with respect to the opening 5.

  Refer to FIG. 1 again. The component 3 is provided with a contact portion 25 that contacts the reference surface 10 of the resin member 2. This is a vertical and horizontal groove into which vertical and horizontal ribs configured as the reference surface 10 are inserted. In the figure, it is shown as a cylindrical shape. In FIG. 5, it is the figure seen from the surface 2f side of the resin member 2. FIG. Although the reference surface 10 is formed on the back surface 2b of the resin member 2, it is shown by a solid line with a hatch. A contact portion 25 formed integrally with the component 3 is fitted around the periphery. By fitting the contact portion 25 to the reference surface 10, the position of the component 3 in the vertical and horizontal directions is regulated in the plane of the opening 5.

  Therefore, the position of the component 3 in the plane of the opening 5 of the resin member 2 is regulated by the pair of left and right pressing pieces 22 a and 22 b and the contact portion 25. Further, since the contact portion 25 is provided at a position away from the opening 5, the movement of the component 3 in the rotational direction is also restricted by the sandwiching of the pressing pieces 22 a and 22 b and the contact portion 25. Further, the component 3 is separated from the surface 2f of the resin member 2 by the management surfaces 9a and 9b, the contact surfaces 21a and 21b, the inward claws 8a and 8b of the vertical walls 6a and 6b, and the outward claws 20a and 20b of the component 3. The position in the direction of the back surface 2b is also restricted. Accordingly, the component 3 is regulated at a fixed position with respect to the resin member 2, and when viewed from the surface 2 f of the resin member 2, the dividing line is stably determined and the appearance is improved. In addition, since the engagement between the resin member 2 and the component 3 is stable, a stable operational feeling can be obtained.

  The component mounting structure of the present invention can be suitably used not only when mounting components to resin members in a vehicle, but also widely when mounting components inside trains, airplanes, and ships.

DESCRIPTION OF SYMBOLS 1 Parts attachment structure 2 Resin member 2f Front surface 2b Back surface 3 Parts 5 Opening 6 Vertical wall 6a, 6b A pair of vertical walls 6 8a, 8b Inward claw 9a, 9b Management surface 10 Reference surface 11 Reinforcement ribs 20a, 20b Claw (a part side) 21a, 21b Contact surface 22a, 22b Press piece 23a, 23b Inclined surface 25 Contact portion

Claims (1)

A component mounting structure for mounting a component to the resin member from the back side,
In the resin member,
An opening that is larger than the outer shape of the component and penetrates from the front surface to the back surface;
Along with the edge of the opening is provided with a frame-like vertical wall extending in the back surface direction,
Among the vertical walls, the opposing vertical walls are
Nails facing inward,
A management surface that is provided at an end surface of the vertical wall at a position different from the position at which the claw of the opposing vertical wall is provided, and that comes into contact with the component inserted from the back side;
The parts include a pair of outward claws that engage the claws;
A contact surface that contacts the management surface;
A component mounting structure comprising a pair of pressing pieces formed by sandwiching a vertical wall provided with a management surface from outside to inside and continuously formed on the outside of the contact surface.