JP2016035985A - Electrical component device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enlarge a mounting space of an electrical circuit in a circuit board in an electrical component device in which a housing having an electrical component fitted thereto and a case housing the circuit board therein are integrated with each other.SOLUTION: A circuit board 4 is arranged nearer to a cover 6 side than a screw component 7, and in the circuit board 4, tool insertion holes 41 are provided which are used for passing a tool used for detachment of the screw component 7 therethrough, thereby reducing a gap between the outer peripheral surface of the circuit board 4 and the inner wall surface of a case 5 and enlarging a mounting space of an electrical circuit in the circuit board 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electrical component device in which a housing in which electrical components are mounted and a case in which a circuit board is accommodated are integrated.

  Conventionally, as this kind of electrical component device, there is one described in Patent Document 1, for example. In the electric component device described in Patent Document 1, a case that accommodates a circuit board is fixed to a housing of an electric motor with a bolt. Further, the head portion of the bolt is housed in the case and disposed near the inner wall surface of the case. And in order to avoid interference with a volt | bolt, the circuit board has the shape which escaped from the inner wall face of the case in the vicinity of the volt | bolt.

JP 2012-239294 A

  However, since the circuit board is shaped so as not to interfere with the bolts, the gap between the outer peripheral surface of the circuit board and the inner wall surface of the case becomes large, and as a result, the mounting space of the electric circuit on the circuit board There was a problem that became smaller.

  In view of the above points, an object of the present invention is to increase the mounting space of an electric circuit on a circuit board.

  In order to achieve the above object, according to the first aspect of the present invention, there is provided a housing (1) in which electrical components (2, 3) are mounted, and a circuit board (4) having an electrical circuit for driving the electrical components. And a cylindrical case (5) having an accommodating space (51) for accommodating the circuit board and having an opening at one end closed by the housing, and a screw component (screw part) that is screwed to the housing and fixes the case to the housing ( 7) and a cover (6) that closes the opening at the other end of the case, the screw component head (72) is disposed in the accommodating space, and the circuit board is the screw component head. It is arranged on the cover side with respect to the part (72), and has a tool through hole (41) through which a tool used for attaching and detaching screw parts is passed.

  According to this, since the gap between the outer peripheral surface of the circuit board and the inner wall surface of the case can be reduced, the mounting space for the electric circuit on the circuit board can be increased.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

It is a disassembled perspective view of the electrical component apparatus which concerns on one Embodiment of this invention. It is sectional drawing which shows the structure of the principal part of one Embodiment.

  An embodiment of the present invention will be described.

  The brake fluid pressure control actuator as the electrical component device shown in FIGS. 1 and 2 is provided between the master cylinder and the wheel cylinder in the vehicle brake device to control the brake fluid pressure applied to the wheel cylinder. It is used as something to do.

  As shown in FIGS. 1 and 2, the brake fluid pressure control actuator includes a housing 1, electrical components for brake fluid pressure control such as a solenoid valve 2 and an electric motor 3, a circuit board 4, a case 5, a cover 6, and screw components. 7 or the like.

  The housing 1 is a substantially rectangular parallelepiped and is made of metal (for example, aluminum). The housing 1 includes a brake fluid passage through which the brake fluid flows, and a pump (not shown) that sucks and discharges the brake fluid. Further, on one surface of the housing 1, there is a female screw portion 11 in which a female screw to which the screw component 7 is screwed is formed.

  The solenoid valve 2 opens and closes a brake fluid passage, and a plurality of solenoid valves 2 are arranged and fixed on one surface of the housing 1. Parts of the solenoid valve 2 other than the coil unit (not shown) are fitted into a recess (not shown) formed on one surface of the housing 1, and in this state, for example, a part of the housing 1 is caulked to electromagnetically A valve 2 is fixed to the housing 1.

  The coil unit is disposed outside the housing 1. A solenoid coil built in the coil unit is electrically connected to the circuit board 4.

  The coil unit is configured to be detachable from the remaining part of the electromagnetic valve 2. For this reason, after connecting only the coil unit to the circuit board 4 first, the remaining part fixed to the housing 1 can be integrated with the coil unit.

  The electric motor 3 is fixed to the surface of the housing 1 opposite to the mounting surface of the electromagnetic valve 2. By driving the pump by the electric motor 3, the brake fluid is sucked and discharged by the pump, and the brake fluid pressure can be controlled. The electric motor 3 is electrically connected to the circuit board 4.

  In addition to the solenoid valve 2 and the electric motor 3, the housing 1 is also assembled with a pressure sensor that detects the pressure of the master cylinder (not shown). Among these, the electromagnetic valve 2 and the pressure sensor are electrical components covered by the case 5.

  The case 5 has a rectangular tube shape and is made of resin. The case 5 has an accommodation space 51 for accommodating the circuit board 4. This accommodation space 51 is a substantially rectangular parallelepiped space.

  A plate-like flange portion 52 that protrudes from the inner wall surface of the case 5 toward the housing space 51 side is formed at the end portion on the housing 1 side of the case 5, and the shaft portion 71 of the screw part 7 is formed on the flange portion 52. A threaded part through hole 53 is formed in which is inserted.

  Then, the end surface on the housing 1 side of the case 5 is brought into contact with the housing 1 and the screw part 7 is screwed into the female screw portion 11 of the housing 1, whereby the opening on one end side of the case 5 is closed by the housing 1. At the same time, the case 5 is fixed to the housing 1. When the screw part 7 is screwed into the housing 1, the head 72 of the screw part 7 is located in the accommodation space 51. The screw component 7 can be a hexagon socket head cap screw or a Torx (registered trademark) screw.

  The cover 6 is a thin plate that is substantially rectangular and is made of resin. The cover 6 is fixed to the end of the case 5 opposite to the housing 1 by press-fitting and closes the opening on the other end side of the accommodation space 51.

  The circuit board 4 is a thin plate and is substantially rectangular, and has an electric circuit for driving electric components such as the electromagnetic valve 2 and the electric motor 3. Although not shown in FIG. 1, an electronic control device (hereinafter referred to as a brake ECU) that controls driving of electrical components is mounted on the circuit board 4. For this reason, brake hydraulic pressure control is performed by the brake ECU controlling various electronic components based on various signals input from the outside and detection signals such as a pressure sensor assembled in the housing 1. Yes.

  In addition, the circuit board 4 is disposed on the cover 6 side of the head part 72 of the screw component 7 in the accommodation space 51 and is fixed to the case 5. Further, a tool through hole 41 for passing a tool used for detaching the screw component 7 is formed in the circuit board 4 at a position facing the head portion 72 of the screw component 7.

  Next, a method for assembling and disassembling the brake fluid pressure control actuator according to this embodiment will be described.

  When assembling, first, the case 5 is brought into contact with a portion of the electromagnetic valve 2 other than the coil unit, the housing 1 in which the electric motor 3, the pressure sensor, and the like are assembled, and the screw component 7 is connected to the female screw portion 11 of the housing 1. And the case 5 is fixed to the housing 1.

  Subsequently, the coil unit of the electromagnetic valve 2 is integrated with the remaining portion fixed to the housing 1, the circuit board 4 is accommodated in the accommodating space 51, the cover 6 is fixed to the case 5, and the assembly is completed. To do.

  On the other hand, when disassembling for parts replacement, first, the cover 6 is removed from the case 5. Subsequently, a tool used for detaching the screw part 7 is passed through the tool through hole 41, and the tip of the tool is engaged with the hole in the head 72 of the screw part 7. Further, the tool is turned to remove the screw part 7 from the housing 1 so that the case 5 can be separated from the housing 1. And after components (circuit board 4 and coil unit which is not illustrated) exchange, it reassembles by the above-mentioned assembly method.

  As described above, in the brake fluid pressure control actuator according to the present embodiment, the circuit board 4 is disposed closer to the cover 6 than the screw component 7, and a tool through hole for passing a tool used for detaching the screw component 7 is passed through. 41 is provided on the circuit board 4, the gap between the outer peripheral surface of the circuit board 4 and the inner wall surface of the case 5 can be reduced, and the mounting space of the electric circuit on the circuit board 4 can be increased. .

(Other embodiments)
In the above embodiment, the present invention is applied to an actuator for brake fluid pressure control. However, the present invention is widely applied to an electrical component device in which a housing in which electrical components are mounted and a case in which a circuit board is accommodated are integrated. be able to.

  In the above embodiment, the cover 6 is fixed to the case 5 by press fitting, but the cover 6 may be fixed to the case 5 by welding.

  In the assembling method of the above embodiment, the circuit board 4 is accommodated in the accommodating space 51 after the screw part 7 is screwed to the female thread portion 11 of the housing 1 and the case 5 is fixed to the housing 1. The case 5 may be fixed to the housing 1 by screwing the screw part 7 into the female threaded portion 11 of the housing 1 while being accommodated in the accommodation space 51. In this case, the screw part 7 can be screwed into the housing 1 by passing the tool through the tool through hole 41.

  In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably.

  Further, in the above-described embodiment, it is needless to say that elements constituting the embodiment are not necessarily indispensable except for the case where it is clearly indicated that the element is essential and the case where the element is clearly considered to be essential in principle. .

  Further, in the above embodiment, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is particularly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to a specific number except for cases.

  In the above embodiment, when referring to the shape, positional relationship, etc. of components, the shape, position, etc., unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to relationships.

1 Housing 2 Solenoid valve (electric part)
3 Electric motor (electrical parts)
4 Circuit board 5 Case 6 Cover 7 Screw part 51 Accommodating space 53 Tool through hole 72 Head

Claims (4)

A housing (1) fitted with electrical components (2, 3);
A circuit board (4) having an electric circuit for driving the electric component;
A cylindrical case (5) having an accommodation space (51) for accommodating the circuit board and having an opening at one end closed by the housing;
A screw component (7) screwed into the housing and fixing the case to the housing;
In an electrical component device comprising a cover (6) for closing the opening at the other end of the case,
A head (72) of the screw component is disposed in the housing space;
The circuit board is disposed on the cover side with respect to the head (72) of the screw component, and has a tool through hole (41) through which a tool used for attaching and detaching the screw component is passed. Parts device.   The electrical component device according to claim 1, wherein the cover is detachable from the case.   The electric component device according to claim 1, wherein the cover is press-fitted and assembled to the case. The housing has a brake fluid passage through which brake fluid flows,
The electrical component device according to any one of claims 1 to 3, wherein the electrical component is an electromagnetic valve (2) that opens and closes the brake fluid passage.

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