JP2784682B2 - Switch mounting board mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention has a function of washing a local part with hot water at an appropriate temperature, a function of drying a local part with hot air after washing, and a function of heating a toilet seat to an appropriate temperature. The present invention relates to a so-called sanitary washing device provided with a switch mounting substrate mounting structure for mounting various switches for controlling the device.

[Conventional technology]

In general, a sanitary washing device is, for example, as shown in FIG. 1, a control box having a function of spraying hot water to a local area after stool and washing, and a function of drying the washed local area with warm air. 1, a heating toilet seat 2 having a built-in heater is pivotally attached to the toilet, and the control box 1 is installed on the back of the toilet 3 in a state where the heating toilet seat 2 is mounted on the toilet 3 so as to be freely opened and closed. At the time of local cleaning, cleaning is performed with warm water spouted from a cleaning nozzle 4 that moves into and out of the toilet bowl 3 from below the control box 1, and a drying process (not shown) is performed near the cleaning nozzle 4 of the control box 1. It is configured such that warm air can be discharged from the wind discharge port.

As shown in FIG. 9, a switch for driving and stopping each function of washing, bidet and drying, a switch for operating the heating toilet seat 2, and the like are provided on the side of the control box 1.
An operation box 7 in which operation buttons 6 of the various switches for controlling and driving the sanitary washing device 5 are arranged on the surface is formed integrally with the control box 1. The sanitary washing device 5
A control device for controlling the temperature of the hot water and the hot air or the temperature of the heating toilet seat 2 is housed and installed in the control box 1. Various switches for operating the control device are attached to the operation box 7 as shown in FIG. 9. The structure of the switch will be described with reference to FIG. Alternatively, various electronic components for controlling an electric pump for supplying water to the sanitary washing device 5.
The first printed circuit board 8a is mounted on the bottom surface of the lower casing 7a in a state where the board 8 is fitted to mounting bosses 9, 9a projecting upward from the lower casing 7a of the operation box 7. Supported. Reference numeral 7b denotes an upper casing covered on the lower casing 7a. Inside the casing 7b, a switch 10 for driving and stopping each of the functional units of the sanitary washing device 5 and a display LED 11 for displaying an operation status are provided. The switch mounting board 12 provided with the above is fitted and held on the mounting bosses 9 and 9a via compression springs 13. Further, on the surface of the upper casing 7b, a fitting hole 14 is formed in correspondence with each switch 10, and an operation button 6 integrally formed with an operating shaft 6a that comes into contact with the upper surface of the switch 10 is fitted into the fitting hole 14. At the same time, a thin resin sheet 7c made of urethane resin or the like is stuck on the upper casing 7b from above the operation buttons 6. When the upper casing 7b provided as described above is put on the lower casing 7a, the upper casing 7b has the switch mounting board 12 fitted to the mounting bosses 9, 9a via the compression springs 13, and the mounting bosses 9, The lower casing 7a is crowned by screwing a fastening screw 16 to a boss 15 provided on the upper casing 7b so as to penetrate the lower casing 7a.

In the figure, reference numeral 17 denotes a printed circuit board 8 and a switch mounting board.
This is a flat cable that electrically connects the 12

[Problems to be solved by the invention]

However, since the printed circuit board 8 and the switch mounting board 12 mounted in the operation box 7 are both formed in a flat shape, they are usually divided into two pieces due to the mounting space in the operation box 7. Therefore, it is difficult to effectively use the dead space in the operation box 7 for mounting, and there is a problem that the operation box 7 itself becomes large due to a lot of unnecessary vacancies in the operation box 7. .

In addition, printed circuit boards 8 and 12 currently on the market are usually formed into a semi-cured state by impregnating a sheet-shaped glass base material with, for example, a thermosetting phenol resin or an epoxy resin, and then laminating the required number of sheets. In the state where the copper foil was placed on the surface, a heat treatment and a pressure treatment were performed by a laminating press to produce the product. The printed circuit board manufactured as described above is called a so-called hard board. If the printed circuit board is forcibly bent, the printed circuit board is damaged and usually has to be used in a flat state. That is, it may be curved at a certain curvature,
Three-dimensional use such as bending was not possible at all.
For this reason, when assembling the operation box 7 of the sanitary washing device 5, if the printed circuit boards 8, 12 are used in a flat state,
The mounting is inevitably restricted and the mounting space must be widened, which becomes a bottleneck and increases the dead space, which increases the size of the operation box 7 and restricts the freedom of novel design design. Problem.

Therefore, printed circuit boards that are currently in practical use can be used only in a simple and planar manner, and it is difficult to reduce the size and weight of electrical appliances such as sanitary washing devices that use this type of printed circuit board. Was.

In view of the various problems described above, the present invention provides a circuit board provided with a required conductor pattern on a flat insulating substrate that has been specially processed in advance, with an arbitrary curvature corresponding to the mounting space of the equipment to be used. The mounting of the switch mounting board, which enables three-dimensional and three-dimensional use by bending, and allows the switch mounting board composed of the circuit board to be arbitrarily bent and mounted in accordance with the shape of the mounting place. It is to provide a structure.

[Means for solving the problem]

The present invention is a thermoplastic high viscosity saturated polyester resin,
An inorganic filler, a glass fiber, and a flame retardant are added and kneaded, and the mixture is extruded to form a sheet-shaped insulating substrate in an amorphous state, and a predetermined conductor pattern is formed on the insulating substrate to form an amorphous state. The circuit board is provided, and the circuit board is in an amorphous state. At a predetermined curvature while being semi-crystallized at a predetermined temperature, for example, by performing a curve forming into a U-shape,
A three-dimensional switch mounting substrate having a conductor pattern and excellent in self-returning property and elasticity (toughness) is provided, and a switch for operating, for example, a sanitary washing device is provided on one (upper side) of the outer surface of the switch mounting substrate. In addition, electronic components are mounted on the inner surface on the other side (lower surface) of the outer surface, and one of the free ends of the three-dimensional switch mounting board on which the electronic components and the like are mounted is provided with a sanitary washing device. The switch box is configured by fitting and supporting a lower pair of casings on a mounting boss for fixing and supporting the lower pair of casings, and engaging the other free end of the lower end with a support projection projecting from an inner wall surface of the casing. The mounting board can be mounted three-dimensionally by effectively utilizing the narrow space in the operation box, and its operation is as follows.

(Operation)

According to the present invention, a switch mounting board for mounting operation switches and electronic components is bent in a required shape, for example, a three-dimensional shape such as a U-shape, and separated into an upper side and a lower side (including an inner side). Since the switch mounting board is configured so that mounting parts can be mounted at, for example, three-dimensional mounting can be performed by effectively utilizing a space in the operation box of the sanitary washing device, as in the related art. Compared to the case of using multiple flat printed circuit boards, the mounting space for the switch mounting board can be narrowed, and dead space can be effectively used by three-dimensional mounting, and the mounting area of the mounted components can be reduced. It is possible to expand. Besides, there is no need to use a flat cable at all,
The empty space in the operation box can be effectively used for mounting the mounted components, thereby reducing the dead space of the operation box and promoting the miniaturization and weight reduction of electric equipment such as a sanitary washing device. In addition, since the switch mounting board can be bent into an arbitrary shape, the degree of freedom in design and design of the equipment to be used can be increased.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 2 to 7, the same components as those in FIGS. 1 and 9 are denoted by the same reference numerals and described.
Further, an example in which the present invention is applied to a switch mounting board for mounting an operation switch of a sanitary washing device will be described.

The mounting structure of the switch mounting board of the present invention is different from that of the related art in that a single switch mounting board is formed into a curved surface and mounted to reduce the dead space and simplify the mounting operation. It is in the point which did.

First, a description will be given of a schematic manufacturing process of an insulating substrate used for manufacturing the switch mounting substrate of the present invention.

The insulating substrate is made of a thermoplastic, highly heat-resistant, high-viscosity saturated polyester resin, kneaded with an inorganic filler, a single glass fiber, and a flame retardant, and kneaded with the required thickness (about 1.2 mm). ), And extruded continuously into a sheet shape. This insulating substrate is, for example, an electrical insulating material developed by Unitika Co., Ltd.
Corresponds to this. When this insulating substrate is extruded into a sheet, it is in an amorphous state and has excellent elasticity,
When heated at the required temperature, it is crystallized to maintain the predetermined shape permanently, and has elasticity so that it does not become flat even when an external force more than necessary is applied, and can return to the predetermined shape by itself. ing.

Next, as shown in FIG. 3, a description will be given of a case where the switch mounting substrate is manufactured by forming the insulating substrate into, for example, a U-shaped curve.

First, in FIG. 5, on an insulating substrate in an amorphous state, which was extruded into the sheet shape and formed to a required thickness, an adhesive sheet was pressed at a temperature of about 50 ° C. under a pressure of 10 kg / cm ^2. about
Temporary bonding was performed for 20 minutes, and then a copper foil having a thickness of 35 μm was placed on the adhesive sheet by a hot roll press for about 70 minutes.
Laminating treatment is performed by heating and pressing at a temperature of 10 ° C. and 10 kg / cm ² . Next, an etching resist for forming a required conductor pattern (not shown) is printed on the copper foil and cured, and then an etching process is performed using an etchant. Then, the solder resist is printed and hardened except for the parts required for the soldering operation. Thereafter, the insulating substrate subjected to each of the above treatments is pressed with a pressing die to indicate a hole portion for mounting electronic components or a fitting hole 20 for mounting a substrate, and further indicates a bending position of the substrate, and to facilitate bending. A notch 21 (see FIG. 7) is provided, or the outer shape of the board is shaped by press punching to produce a flat circuit board 22 as shown in FIG. At this point, the circuit board 22 is in a flexible, amorphous state that is rich in flexibility.

Next, a description will be given of a case where the circuit board 22 is formed into a U-shape with a predetermined curvature to form, for example, a switch mounting board 23 for mounting various switches for driving and operating a sanitary washing device.

First, in order to gently bend one of the free ends, as shown in FIG. 7, a flat and amorphous state of the circuit board 22 is left in the flat state shown in FIG. It is clamped by a metal fitting (not shown) provided to bend at a curvature. At this time, since the circuit board 22 is in an amorphous and flexible state, the circuit board 22 can be smoothly sandwiched in a state where the circuit board 22 has been adjusted to the shape of the metal mold. In the above state, the circuit board 22 is put into a heating furnace (not shown) together with the molding hardware,
This is subjected to a heat treatment at a temperature of about 160 ° C. for about 30 minutes to change from an amorphous state to a semi-crystallized state.
Has a reduced toughness, and can be easily bent. Subsequently, on the semi-crystallized flat circuit board 22, as shown in FIG. 7, a switch 24 for raising or lowering the temperature of hot water or hot air within a set range and a "cleaning" , "Bidet", "Dry", "Toilet seat", "Stop" switch 25 and the display LED 26 from the position where the tip is gently curved to the backward direction (left direction in FIG. 7). It is mounted at a predetermined conductor pattern position (not shown). When the circuit board 22 is bent into a U-shape, required electronic components 8a are shown at positions opposite (lower) to the mounting positions of the switches 24 and 25, as shown in FIG. It is mounted at the position of the predetermined conductor pattern that is not used.

As described above, after mounting the required mounting components at predetermined conductor pattern positions on the circuit board 22,
Is bent into a U-shape as shown in FIG. 7 so that the electronic component 8a is located on the lower side about a preset position. At this time, the circuit board 22 can be smoothly curved because the toughness is reduced. In addition, before bending, a notch 21 is formed in a portion of the circuit board 22 to be bent as shown in FIG.
Forming, or thinning by cutting, etc.
By providing the notch 21 or the like within a range that does not damage the conductor pattern, the curved portion is narrower or thinner than other flat portions, so that the bending work may break the conductor pattern. It can be performed smoothly and satisfactorily without performing.

As described above, if the circuit board 22 is simply bent into a U-shape, if the curvature of the bending portion 27 (see FIG. 7) changes or an external force is applied, the circuit board 22 is deformed to the original shape. In some cases, the curvature does not return. Therefore, the circuit board 22
After being bent as described above, an arc-shaped forming jig (not shown) provided for setting and holding the bending portion 27 at a predetermined curvature is sandwiched between the bending portions 27, and Is heated by a heater attached to the inside thereof, and the curved portion 27 of the circuit board 22 sandwiched between the molding jigs is locally forcibly heated at a crystallization temperature of about 200 ° C. for several minutes. When the above-mentioned heating operation is completed and the circuit board 22 is lowered to room temperature by the cooling means and the molding jig is removed, one of the free ends of the circuit board 22 is gradually curved as shown in FIG. And, as shown in FIG. 3, a U-shape used for attaching to the operation box 7 of the sanitary washing device 5 with the curved portion at the back thereof provided with a curved portion 27 which is curved at a constant curvature. Thus, a three-dimensional switch mounting substrate 23 can be formed. Further, since the curved portion 27 is crystallized at a crystallization temperature, even if an external force is applied to the curved portion 27, its curvature only temporarily changes, and the original state is restored with the disappearance of the external force. The switch mounting board 23 is provided to maintain a predetermined curvature and prevent the switch mounting board 23 from being deformed.

Next, the switch mounting substrate 23 obtained by performing the U-shaped curve forming and three-dimensionally mounting is attached to the operation box 7 of the sanitary washing device 5.
A description will be given of a case in which the device is mounted on a vehicle.

At the time of mounting, as shown in FIG. 3, a mounting boss 9a which is erected in the lower casing 7a of the operation box 7 is inclined.
The loosely curved free end side of the switch mounting board 23 is fitted into the switch mounting board 23 with the compression spring 13 interposed using the fitting hole 20, and the other free end side, that is, the portion where the electronic component 8a is mounted. The substrate side is mounted on a support projection 28 projecting from the side wall of the lower casing 7a as shown in FIGS. As a result, as shown in FIG. 3, the switch mounting board 23 is three-dimensionally accommodated in the lower casing 7a with the operation switches 24 and 25 positioned on the upper side and the electronic component 8a positioned on the lower side. Can be. Thereafter, the operation switches 24, 2
The upper casing 7b provided with the operation button 29 at the position corresponding to 5 via the operation shaft 29a is attached, and the assembly of the operation box 7 of the sanitary washing device 5 is completed.

When operating the operation switches 24 and 25, the switch mounting board 23 is formed in a substantially U-shape, so when the operation button 29 is strongly pressed, the switch in the pressed portion is bent by the bending phenomenon of the switch mounting board 23, The switch mounting board 23 is formed so as to temporarily return to the original position with the release of the pressing force, but the operation switch
There is no contact failure during the 24,25 operation. Also, one free end side of the switch mounting board 23 is gently curved and is mounted on the mounting boss 9a via the compression spring 13, so that when the switch is released from the pressing,
Since the free end always exerts a force to return to the original position by its own repulsive force and the urging force of the compression spring 13,
Due to the inclination of the free end side, it is possible to reliably prevent the switch from being inferiorly contacted at this position. Further, the switch mounting substrate 23 has one of its free ends gently curved, and the entire shape is curved and formed into a U-shape, so that the mounting components can be rationally arranged and dead space can be reduced. It is possible to reduce the size of the operation box 7 and to make the design of the operation box 7 smaller, such as by rounding the shape of the operation box 7 by curving the switch mounting board 23. it can.

FIG. 8 shows another embodiment of the present invention, in which the switch mounting board 23a is bent into a U-shape as described above,
The electronic component 8a is arranged inside the switch mounting substrate 23a, and in this state, the inside of the switch mounting substrate 23a is foamed and filled with a silicone resin or the like, so that the electronic component 8a is insulated and the mechanical characteristics of the switch mounting substrate 23a itself are reduced. A resin-filled layer 30 for strengthening the strength is provided. On the other hand, the switch mounting board 23a
On the upper surface side, a pair of electrodes are
a, b, and above the electrodes a, b, a resin sheet 31 provided with a movable contact c is attached to the upper casing 7b to provide operation switches 24a, 25a, and a switch mounting board is provided on the lower casing 7a. 23a is accommodated and installed as described above, and the lower casing 7a
The present invention is established even if the switch casing 23a is attached to the operation box 7 by attaching the upper casing 7b to the operation box 7.

By mounting the switch mounting board 23a as described above, the insulation and mechanical strength of the mounting board 23a itself can be enhanced, and the configuration of the operation switches 24 and 25 can be simplified. There is an advantage that the operation box 7 can be made more compact.

〔The invention's effect〕

Since the present invention is configured as described above, the shape of the operation box of the sanitary washing device is completely different from the conventional one in which the operation box is provided according to the size of the printed circuit board. The switch mounting board is configured to be bent three-dimensionally using the board so that it can be mounted three-dimensionally. It can be manufactured by design. In addition, by mounting the switch mounting board three-dimensionally, mounting parts such as various switches can be efficiently mounted, and the mounting space can be effectively utilized to collectively mount the switch mounting board itself. Combined with the downsizing of the operation box, the sanitary washing device can be made small, lightweight and economical. Further, by providing the resin-filled layer in the space inside the three-dimensionally formed switch mounting board, there is an advantage that the insulation of the electronic component and the mechanical strength of the board itself can be enhanced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a toilet bowl to which a sanitary washing device is attached, FIG. 2 is a plan view of an operation box used in the device, and FIG. FIG. 4 is a vertical sectional front view showing the same main parts, FIG. 5 is a schematic manufacturing process diagram of a switch mounting substrate, and FIG. 6 is a plan view of an insulating substrate used for manufacturing the switch mounting substrate. FIG. 7, FIG. 7 is a perspective view of a switch mounting board on which a part of the mounting parts is mounted, FIG. 8 is a vertical sectional side view showing a main part of another embodiment of the present invention, and FIG. It is a side view which shows the mounting structure of the conventional printed circuit boards, such as a switch mounting board, by cutting a box longitudinally. 5 ... sanitary washing device, 7 ... operation box, 23 ... switch mounting board, 24, 25 ... operation switch, 27 ... curved part, 30 ... resin filled layer

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideo Takino 1 Aichi-cho, Kasugai-shi, Aichi Prefecture Aichi Electric Co., Ltd. Masaaki (56) References JP-A 3-36072 (JP, U) JP-A 63-76075 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E03D 9/00-9 / 16

Claims (2)

(57) [Claims] 1. A sanitary washing apparatus having a toilet with a function of washing with hot water and the like. A switch mounting board for mounting various switches for operating a control device for controlling the temperature of hot water or hot air and a switch mounting board for mounting electronic components are three-dimensional. A switch mounting board, operation switches on an upper surface side, and electronic components on a lower surface side, each of which is separately mounted and mounted on an operation box. Board mounting structure. 2. The switch mounting board according to claim 1, wherein a resin insulating layer is provided by foaming and filling a synthetic resin in a space inside the curved portion of the curved switch mounting board. Mounting structure.