JPH0638291U - Control box assembly structure - Google Patents

Abstract

(57) [Summary] [Purpose] The workability of assembly is easy and the mounting accuracy of the printed circuit board can be improved. A positioning hole and an elongated hole that are inserted into and fitted to at least two positioning pins formed on a housing cover are provided through a printed circuit board, and further, the positioning pins are elastically externally fitted to the rear surface of the housing. A positioning boss and a rotation-stop boss that fit in a circular shape are provided, and these positioning pins are assembled in series.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a control box assembly structure for a control box, such as a storage device for wiring and storing electrical parts such as an air conditioner in a vehicle.

[0002]

[Prior art]

 Conventionally, as an assembly structure of a control box of this kind, for example, a storage device for wiring and storing electrical-related parts of an air conditioner in a vehicle, there is a control box 1 shown in FIG. 10 and a housing 20. The housing cover 2 has a mounting frame 3 on which the printed circuit board 10 is mounted, and an edge 4 is formed on the mounting frame 3 so that the printed circuit board 10 can be fitted therein. A positioning pin 5 having a length is provided so as to project, and assembling holes 6 are provided at left and right positions at predetermined intervals by the positioning pin 5. A locking claw 7 for engaging the housing 20 is formed at a predetermined position of the edge portion 4, and a holding claw 8 of the printed circuit board 10 is formed at a predetermined position inside the same.

Further, various electric parts are arranged on the printed circuit board 10 and are formed in a rectangular shape shown in the figure so that they can be fitted into the housing cover 2. The printed circuit board 10 is provided with the housing cover 2 so as to project therefrom. A positioning hole 11 is provided so as to be aligned with the positioning pin 5, and an assembling hole 12 that is aligned with the assembling hole 6 provided through the housing cover 2 is provided on the left and right of the positioning hole 11. Further, a positioning hole 13 through which a positioning pin 25 protruding from the housing 20 is inserted is provided at a predetermined position of the printed circuit board 10.

Further, the housing 20 is formed into a substantially bottomed box shape by forming an edge frame 22 on the four circumferences of the display plate 21, and is formed so as to be externally fitted to the housing cover 2. The edge frame 22 has a housing. A locking piece 23 that engages with the locking claw 7 formed on the cover 2 is formed. Further, a screw receiving boss 24 having a predetermined length is provided on the back side of the display plate 21 so as to be aligned with the assembling hole 6 of the housing cover 2 and the assembling hole 12 penetrating the printed circuit board 10. At the same time, positioning pins 25 inserted into the positioning holes 13 formed through the printed circuit board 10 are provided in a protruding manner.

As shown in FIG. 5, the housing cover 2 thus formed is inserted into the positioning pin 5 through a positioning hole 11 penetrating the printed circuit board 10 to be fitted into the housing cover 2 to form a housing. The printed circuit board 2 is pushed in and engaged with the holding claws 8 in a state where the mounting hole 6 of the cover and the mounting hole 12 penetrating the printed circuit board 10 are aligned with each other. Then, the housing 20 is externally fitted to the housing cover 2, the positioning pin 25 on the back side is inserted into the positioning hole 13 of the printed circuit board 10, and the locking piece 23 is engaged with the locking claw 7. The control box 1 is formed by inserting the assembling screws 27 into the assembling holes 6 and 12 from the second side and screwing the screws into the screw receiving boss 24.

[0006]

[Problems to be solved by the device]

 However, in the conventional assembly structure of the control box 1, the printed circuit board 10 is inserted into the positioning pins 5 of the housing cover 2 to be positioned, and various parts are arranged on the printed circuit board 10. Therefore, since the mounting hole 12 is displaced by pivoting around the isoposition determining pin 5, a positioning hole 13 is provided to correct the mounting hole 12 and the positioning hole 13 is inserted into the positioning hole 13. Since the positioning pin 25 for positioning is provided on the housing 20 side and positioned and fixed in the front and rear directions, the work efficiency of the assembling work is extremely poor. was there.

The present invention has been made to solve the above technical problems, and an object of the present invention is to provide an assembly structure of a control box which can be easily assembled and can improve the mounting accuracy of a printed circuit board. It is what

[0008]

[Means for Solving the Problems]

 In order to solve the above technical problems, the present invention has a positioning hole and a long hole which are inserted through and fitted to at least two positioning pins formed in a housing cover, and are penetrated through a printed circuit board. The control box assembly structure has a configuration in which a positioning boss and a rotation-stop boss that are elastically fitted to the positioning pin are provided, and the positioning pin is assembled in series to the positioning pin.

[0009]

[Action]

 With the above configuration, it is possible to assemble the print substrate and the housing in series in this order through the positioning pins on the housing cover.

[0010]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a control box 31. The control box 31 includes a housing cover 32, a printed circuit board 40, and a housing 50 as in the conventional case. It is configured.

In this housing cover 32, an edge portion 34 is formed in an attachment frame 33 to which the printed circuit board 40 is attached, as in the conventional case, so that the printed circuit board 40 can be fitted therein. Positioning pins 35a and 35b each having a length are provided at substantially equal intervals so as to project from each other, and an abutment 35c having a predetermined height is formed integrally with the bases of the positioning pins 35a and 35b to abut the print substrate 40. Among the positioning pins 35a and 35b, for example, the positioning pin 35b also serves as a rotation stop. Further, screw receiving bosses 36a and 36b having the same height as the abutment 35c are formed at predetermined positions on the left and right of the positioning pin 35b which also serves as the rotation stop. A plurality of locking claws 37 for engaging the housing 50 are formed at predetermined positions on the edge portion 34.

Further, various electric parts are arranged on the printed circuit board 40 and formed into a rectangular shape as shown in the figure so that the printed circuit board 40 can be fitted into the housing cover 32. A positioning hole 41 is provided so as to be inserted through the positioning pin 35a so as to be inserted therethrough, and an elongate hole 42 for preventing rotation is provided correspondingly with the positioning pin 35b. Further, assembling holes 43a and 43b are provided so as to correspond to the screw receiving bosses 36a and 36b provided on the housing cover 32.

Further, the housing 50 is formed into a substantially bottomed box shape by forming edge frames 52 on the four circumferences of the display plate 51 as in the conventional case, and is formed so as to be externally fitted to the housing cover 32. The frame 52 is provided with a locking piece 53 that engages with the locking claw 37 formed on the housing cover 32. In addition, a positioning boss 54 having an elastic edge 54a that elastically fits with the positioning pin 35a formed on the housing cover 32 and that aligns with the positioning hole 41 of the printed circuit board 40 is formed on the rear surface side of the display plate 51. Similarly, on the back surface of the display plate 51, there are upper and lower elastic edges 55a that elastically cling to the positioning pins 35b formed on the housing cover 32, and a long hole for preventing the print substrate 40 from rotating. A detent boss 55 is formed which is aligned with 42.

In order to assemble the control box 31 thus formed, first, the positioning pins 41a and 35b of the housing cover 32 are inserted into the positioning holes 41 and the elongated holes 42 penetrating the printed circuit board 40, and the same printing is performed. When the board 40 is brought into contact with the abutment 35c, it is also brought into contact with the screw receiving bosses 36a and 36b. In this state, the mounting holes 43a and 43b of the printed board 40 and the screw receiving bosses 36a and 36b are aligned. It is attached by a screw 27.

After that, when the housing 50 is fitted onto the housing cover 32 in an external fitting manner, the positioning boss 54 and the rotation stop boss formed on the rear surface of the housing 50 with respect to the positioning pins 35 a and 35 b of the housing cover 32. At the same time when 55 is elastically fitted, the locking piece 53 is engaged with the locking claw 37, and the assembly is completed.

Positioning holes 41 and elongated holes 42, which are inserted and fitted to the positioning pins 35a and 35b formed on the housing cover 32 as described above, are provided through the printed circuit board 40, and further, the positioning is performed on the rear surface side of the housing 50. Since the positioning boss 54 and the rotation-stop boss 55 that are elastically fitted to the pins 35a and 35b are provided, and the positioning pins 35a and 35b are assembled in series, the conventional internal and external Unlike the assembling configuration using the positioning pin from the direction, the assembling property is significantly improved, and even if there is a slight dimensional error in the distance between the positioning pins 35a and 35b, the long hole 42 and the rotation-stop boss 55 can be attached. By providing it, this is absorbed and the mounting accuracy of the printed circuit board 40 is also improved, and the two positioning pins 35a and 35b are mounted in series. With this configuration, there is no restriction on the arrangement of the electric components on the printed circuit board 40.

In the above embodiment, the case where the number of the positioning pins is two has been described as an example. However, the number of positioning pins is not limited to this. For example, when the printed circuit board becomes large, three positioning pins may be provided. In this case, the increased locating pin is dealt with by the slot and the detent boss.

[0018]

[Effect of device]

 As described above, at least two positioning pins formed on the housing cover are provided with a positioning hole and a long hole which are inserted and fitted in the printed circuit board, and further, on the rear side of the housing, the positioning pins are elastically connected to the positioning pins. Since the positioning boss that fits externally and the anti-rotation boss are provided and these positioning pins are assembled in series, unlike the conventional assembly structure using positioning pins from the inside and outside directions, Assemblability is improved, and even if there is a slight dimensional error in the spacing between the positioning pins, it is absorbed by the provision of the long hole and the rotation stop boss, and a slight dimensional error in the spacing between the positioning pins. Even if it occurs, by providing the long hole 42 and the rotation stop boss 55, this is absorbed and the mounting accuracy of the printed circuit board is improved. Since it is configured to be attached to, it is not given a constraint on the arrangement of the electrical components relative to the printed circuit board.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a control box.

FIG. 2 is a rear view of the housing.

FIG. 3 is a cross-sectional view of an assembly portion by a positioning pin.

FIG. 4 is an exploded perspective view of a conventional control box.

FIG. 5 is a cross-sectional view of an assembly portion using a conventional positioning pin.

[Explanation of symbols]

 31 Control Box 32 Housing Covers 35a, 35b Positioning Pins 40 Printed Circuit Board 41 Positioning Holes 42 Long Holes 50 Housing 54 Positioning Boss 55 Rotation Stop Boss

Claims (1)

[Scope of utility model registration request] 1. A control box comprising a housing cover, a printed circuit board and a housing, wherein a positioning hole and an elongated hole, which are inserted into and fitted to at least two positioning pins formed in the housing cover, are formed through the printed circuit board. A control box assembly structure in which a positioning boss and a rotation-stop boss that are elastically fitted to the positioning pin are provided on the rear surface side of the housing, and the positioning pin is assembled in series to the positioning pin.