JPH0450694B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of an embedded switch, and its purpose is to provide a mounting frame that also serves as a heat dissipation plate for a switching element for controlling the load of an electronic circuit, and a cover for the device body. The purpose of the present invention is to provide a structure of an embedded switch that can reduce costs and downsize by using a part of the switch as a part of the switch. The operation switch can be configured with a simple structure, and the terminal is a quick-connect terminal, which makes it easy to connect to the conductor of an external electric wire, and the embedded switch has a terminal cover that insulates the terminal and internal circuit. It is there to provide structure.

The present invention will be explained below with reference to Examples. FIG. 1 shows an exploded perspective view of an embodiment of the present invention.
Reference numeral 1 denotes a synthetic resin molded body made of melamine resin containing glass fibers, and this body 11 houses printed circuit boards 12 and 13 on which electronic circuits are mounted, as well as a common terminal 14 and a feeder for slave device A. terminal 15
Or, the locking spring 1 constituting the load terminal 16
7..., terminal boards 18a, 18b, 18c, etc. are stored in a terminal storage chamber 19 provided at the bottom. The printed circuit boards 12 and 13 are arranged on the top and bottom,
Each terminal is connected by a lead wire l, and each terminal 1
4, 15, 16 terminal boards 18a, 18b, 18c
The lower paper-based printed circuit board 13 is connected to the container body 11 by a separate lead wire l'.
Place the peripheral part on the mounting table 20 inside and screw the screws 21,
It is fixed at 21. Reference numeral 22 denotes a cover molded from the same material as the container body 11, and this cover 22 has a peripheral wall 25 formed from the bottom to the top in a window hole 24 provided in a mounting frame 23 made of die-cast aluminum that can be painted black and also serves as a heat dissipation plate. After the parts are fitted and temporarily fastened with two screws 26, they are held between the container body 11 and the mounting frame 23 as described later. 27 is a handle of the operation switch SW, and this handle 27 is molded from the same material as the container body 11,
A stopper 28 made of stainless steel is fitted into a groove 29 formed at the center of the lower surface to prevent it from falling downward, and the opening 3 of the cover 22 is prevented from falling downward.
It is inserted into 0. The stopper 28 is screwed and fixed to the printed circuit board 12 made of a glass base material with a screw 33, and one end is fixed with a screw 31 to a brass spacer 32a provided upright on the upper surface of the printed circuit board 12, and the other end is fixed to a second end. As shown in the figure, it is placed on the side piece 22b of the cover 22 from the notch 22a of the cover 22, and the inverted triangular supports 34 provided at both ends of the groove 29 of the handle 27 are placed on the handle. 27 can be freely swung to both the left and right sides. Reference numeral 35 denotes a fixing spring made of stainless steel. This fixing spring 35 is press-fitted and fixed into the central boss portion 27d of the handle 27, and the engaging claw 38 is engaged with a hook portion 37 provided on a decorative handle 36, which will be described later. Then, the cosmetic handle 36 is detachably connected. A coil spring 39 is compressed between the handle 27 and the upper surface of the printed circuit board 12, and is used to constantly bias the decorative handle 36 upward through the handle 27. T ₁ and T ₂ are triaxes for load control used in electronic circuits, and these triaxes T ₁ ,
T ₂ is fixed with screws 40, 40 with its upper surface in contact with the lower surface of the mounting frame 23, and its lead terminals are soldered to the printed circuit board 12, respectively. 41
is a lamp cover for protecting the neon lamp NE for position indication mounted on the printed circuit board 12,
It is attached to a cosmetic handle 36 described later. Reference numeral 42 denotes a terminal cover that is attached to the opening of the terminal storage chamber 19. This terminal cover 42 is molded from the same material as the container body 11, and covers each of the terminals 14, 15, 16.
The locking springs 17, the terminal plates 18a, and the display piece 44 for confirming the insertion of the conductor are held down from above and fixed to the container body 11 with screws 45 and nuts 46. Locking spring 17... and terminal board 1
8a... are arranged in parallel and form a so-called quick-connect terminal that clamps the conductor between the flat part of the terminal plate 18a... and the locking spring 17. As shown in the figure, when the conductor is inserted through the conductor insertion hole 47 provided on the lower surface of the device body 11, the tip of the conductor resists the biasing force of the spring 48 compressed between the upper end of the display piece 44 and the terminal cover 42, and the tip of the conductor moves into the display piece. Since the conducting wire is locked by pushing up the inclined surface 44a of 44, its lower end is retracted from the small holes provided on both sides of the jig insertion hole 50 to indicate that the conducting wire has been inserted. Then, by inserting a jig such as a screwdriver through the jig insertion hole 50 and pressing the release button 49 provided corresponding to each terminal, the conductor wires are unlocked by the locking springs 17. If you pull out the conductor, spring 4
The display piece 44 is pushed by the biasing force 8, and the lower end of the display piece 44 protrudes outside the container body 11 through the small hole. The terminal cover 42 has a plurality of protrusions 51 protruding from its upper surface as shown in FIG. 4, and these protrusions 51 constitute a mounting base for the printed circuit board 12. In other words, as shown in FIG. 5, by placing one end of the printed circuit board 2 on which the small switches 52, 52' consisting of micro switches are placed, the decorative handle is inserted through the handle 27 disposed above the one end. This is to prevent large force from being applied to the printed circuit board 12 and deformation when a pressing force is applied from 36, and to prevent malfunction of the small switches 52, 52'. They are located on both sides of the small switch 52 or 52' on the printed circuit board 12, respectively, and are designed to particularly prevent deformation of the printed circuit board 12 in the small switch 52 or 52' portion. Also, these protrusions 5
1, 51... are terminal plates 18a... as shown in FIG.
It can be used as a wiring guide for the lead wire l' connected to the wire, and prevents the lead wire l' from getting caught.

Then, with the cover 22 temporarily fixed to the mounting frame 23 with the screws 26, the printed circuit boards 12, 13, each terminal 14 to 16, etc. are stored in the housing 11, and the handle 27 is fitted into the opening 30 of the cover 22. The coil spring 39 is compressed between the stopper 28 and the printed circuit board 12 as described above, and the body 11 is fixed to the mounting frame 23 with the fixing screws 53.
Then, screw the screw 31 inserted from the top surface of the cover 22 to the top end of the spacer 32a, and
and the screw 31 clamp one end of the stopper 28.
Furthermore, a triax T ₁ provided on the printed circuit board 12,
Screw the screws 40 and 40 into the screw holes 55 and 55 of the mounting frame 23 through the insertion hole of the mounting part of T ₂ to fix the upper surfaces of the triaxes T ₁ and T ₂ to the lower surface of the mounting frame 23. bring into contact. Furthermore, the printed circuit board 12
The operation shaft 56 of the variable resistor VR for adjusting the time constant of the electronic circuit installed on the top surface is inserted from below through a through hole 57 drilled in the mounting frame 23, and is opposed to the bottom surface of the cosmetic handle 36 described later. Mounting frame 23
The top end is exposed on the top surface. In the figure, 32b is fixed to the other end of the top surface of the printed circuit board 12 with a screw 33'.
This is a spacer into which a screw 58 inserted from the upper surface of the mounting frame 23 is screwed.

Now, when the mounting frame 23 and the container body 11 as described above are assembled, the inclined ribs 27a, 27a provided on the lower surface of both sides of the handle 27 are connected to the small switches 52, 5, respectively.
As shown in FIG.
Push and drive a or 52a' to switch small switch 52 or 5.
2' is turned on. In this way, the operation switch SW consists of these small switches 52, 52'.
It is composed of a coil spring 39, a stopper 28, a handle 27, a decorative handle 36, etc. 6th
Figures a and b show a top view and a side view of the recessed switch of the present invention, assembled as described above.
In the figure, 59 is a mounting hole provided in the mounting frame 23, and 60 is a mounting hole provided in the mounting frame 23.
are engagement holes, and these holes 59 and 60 are used when the mounting frame 23 is embedded or attached to a wall surface or the like.

FIG. 7 is a circuit diagram showing an electronic circuit mounted on the printed circuit boards 12 and 13, that is, a dimming/extinguishing circuit for the lighting load 3. Next, the configuration and operation of this circuit will be explained based on a circuit diagram. 1 in the diagram is the operation switch SW
This is an on-operation detection circuit for detecting the on-operation of the load control circuit 2. When the operation switch SW consisting of small switches 52 and 52' connected in parallel is turned on, the switching circuit 7 is operated to activate the triac T ₂ provided in the load control circuit 2. A phase control element like this is set to a fully conductive state. The first delay circuit 8 sets the triact T ₂ in a fully conductive state for a preset period after the operation switch SW is turned off, and maintains the lighting load 3 in a fully lit state for a predetermined period after the operation switch SW is turned off. It is intended to be maintained. When the delay output of the delay circuit 8 disappears, the switching circuit 7 switches the full conduction setting of the triax _T2 to phase control. The second delay circuit 9 is connected to the dimming control circuit 10 when switching to the phase control.
to try out the load control circuit 2.
This is to control T ₂ to a predetermined phase angle to dim the illumination load 3 to a predetermined level of brightness, and to operate the dimming control circuit 10 for a predetermined period from this point. The dimming control circuit 10 gradually changes the conduction phase angle of the triax T ₂ of the load control circuit 2 in order to gradually reduce the brightness of the lighting load 3 from the predetermined level while the delayed output of the delay circuit 9 is present. It is designed to provide a trigger signal to trigger the trigger signal, and when the delayed output is exhausted, the output of the trigger signal to the triac _T2 is stopped. The rectifier circuit 6 is for providing rectified output to the delay circuits 8 and 9, the switching circuit 7, and the dimming control circuit 10, and is composed of a diode bridge DB2.

However, when the operation switch SW is turned on now, a gate current flows to the gate of triac _T1 , and triac _T1 is turned on. By this turning on, the power supply 2 is connected to the lighting load 3, and all lights are turned on. At the same time, current flows through the primary coil _L1 of the current transformer CT, and an alternating current voltage is induced in the secondary coil _L2 , and the alternating current The voltage is full-wave rectified by diode bridge DB1 and charges capacitor _C2 . On the other hand, the gate voltage of the field effect transistor FET reaches the Zener voltage of the Zener diode ZD1. Therefore, the field effect transistor FET is in a cut-off state,
As a result, transistor Q ₃ turns on, transistor Q ₄ also turns on, and the diode bridge turns on.
The resistors that charge the capacitor _C5 via DB2 are a small resistor _R8 with a resistance value of 10KΩ, a large resistor _R9 with a resistance value of 200KΩ, and a resistor.
It consists of a parallel circuit with a series circuit consisting of a resistor _R12 whose resistance value is higher than that of _R8 and _R9 , and the time required for the voltage across the capacitor _C5 to reach the breakover voltage of the diac DA is extremely short. As a result, the generation phase of the trigger signal becomes near zero phase, making the triac _T2 substantially fully conductive and maintaining the lighting load 3 in a fully lit state.

Next, when the operation switch SW is turned off, the charge stored in the capacitor C ₂ starts discharging through the resistor R ₅ and the variable resistor VR, and the gate voltage of the field effect transistor FET gradually approaches zero. As a result, the drain current of the field effect transistor FET gradually increases, and in response to this increase in drain current, the transistor Q ₁
The emitter-base voltage increases and base current begins to flow. Thereby transistor Q ₁
In response to this, the base current of transistor Q ₂ flows, and the collector current of transistor Q ₂ also flows. Then, the gate voltage of the field effect transistor FET approaches zero, and as a result, transistors Q ₁ and Q ₂ suddenly turn on, the field effect transistor FET turns on, and the transistor Q ₃ turns off. . Due to this off, the base current of the transistor Q ₄ is supplied by the discharge of the charge of the capacitor C ₄ , and during this supply period, the transistor Q ₄ continues to conduct, and the transistor Q ₄ is connected across the capacitor C ₄ . As the voltage decreases, the base current decreases and its impedance changes. The resistor that charges capacitor _C5 when transistor _Q3 is turned off is composed of a series circuit of resistor _R9 and resistor _R12 , and the voltage across capacitor _C4 reaches the breakover voltage of diac DA. lengthen the time. Therefore, by setting the resistance values of R ₉ and R ₈ appropriately in advance, the conduction phase angle can be set smaller by, for example, 50%, and the brightness of the lighting load 3 can be reduced by 50% at the same time as the transistor Q ₃ is turned off.
It is possible to notify the user that the light has been lowered and that the light has entered the process of being turned off. Next, as the voltage across capacitor C ₄ drops as capacitor C ₄ discharges, the impedance of transistor Q ₄ increases as described above, and as the impedance increases, the voltage across capacitor C ₅ gradually decreases. As the time from the breakover of DA to the breakover voltage of the next diagonal DA gradually increases, the phase of the timing to trigger triac _T2 is delayed, and the conduction period of triac _T2 becomes shorter.
The brightness of the lighting load 3 gradually decreases. When the voltage across capacitor _C4 reaches a voltage at which it is no longer possible to maintain conduction of transistor _Q4 , the charging circuit that charges capacitor _C5 through diode bridge DB2 is cut off, and triac _T2 is turned off. As a result, the lighting load 3 is turned off. The voltage across the lighting load 3 changes as shown in FIG. 8 from when the operation switch SW is turned off to when the light is turned off. In Fig. 8 _{, t2} indicates the time when the operation switch SW is turned on.
t ₁ indicates the off time, respectively.

In this way, in the circuit shown in Figure 7, the lighting time _t0 after the operating switch SW of lighting load 3 is turned off is set by the time constants of capacitor C2, variable resistor VR, and resistor R5, and the lighting time is set by the time constant of capacitor _C2 , variable resistor VR, and resistor _R5 , and the lighting time is set by the time constant of capacitor C2, variable resistor VR, and resistor R5. The time of the dimming process up to
t ₀ is set by the time constants of capacitor C ₄ and resistor R ₁₁ , and in the embodiment, the former time is approximately 30 seconds to approximately 5 minutes, and the latter time is approximately constant, 15 seconds to 30 seconds.

Note that the operating switch SW may be inserted at the position of the triax _T1 , and in this case, the triax _T1 and the resistors _R2 and _R3 of the ignition circuit are unnecessary. NE in the diagram
is a neon tube to indicate energization, and ZNR is a surge remover, or a slave device connected in parallel to the operation switch SW.
It has NE and operation switch SW'. L is a chiyoke coil. Furthermore, although the operation switch SW is formed of two small switches 52 and 52', it may of course be one switch.

In the dimming control circuit 9 of the above embodiment, the impedance is gradually increased by using the current amplification function of the transistor _Q4 , and the conduction potential angle of the triac _T2 is changed. Therefore, a phase control pulse may be generated every prescribed pulse. Furthermore, a delay circuit 8,
Although the discharge time of the capacitors C ₂ and C ₄ is used in 9, a method of detecting time by counting prescribed pulses using a combination of oscillation circuits may also be used. Also, the ON operation detection circuit 1 of the operation switch SW
uses a current transformer CT, but by using elements such as photocouplers, the operation switch SW
It may also be possible to detect a turning-on operation.

Furthermore, in the above embodiment, the brightness level of the lighting load at the start of dimming is switched to be approximately 50% lower than the brightness level when all lights are on before that, but the brightness level gradually increases from the start of dimming. Phase control may also be performed to reduce the level of noise.
In this case, if you dim the light for a relatively long time, the light will automatically turn off when you go to bed, and you can use it as a sleep switch.

As a modified example of the application of the present invention, if the phase of the triax, which is a phase control element, is controlled so that the brightness of the lighting load is gradually increased at the same time as the operation switch is turned on, it can be used in places where many people sleep in one place. When turning on the lighting load, it can also be used as a switch that does not disturb the sleep of those who do not need it.

Next, the case where the recessed type switch according to the present invention is attached to the wall surface W will be explained. First, as shown in FIG. 9, wiring is performed in advance, and the mounting frame 23 is fixed to the embedded box X or wall surface W with screws 61. Next, a decorative material Y such as a cloth is attached to the wall surface W, and the decorative material Y is cut along the mounting frame 23 to expose the recessed type switch according to the present invention. After loosening the screws 61, attach the synthetic resin lower frame 62 to the mounting frame 23.
Attach it to the bottom of the In this case, first, the notch 63 of the lower frame 62 as shown in FIG. Therefore, the lower frame 62 can be attached to the mounting frame 2 without removing the mounting frame 23.
It can be attached to the bottom surface of 3. Then, the mounting frame 23 is placed on the lower frame 62, the projections 65 of the lower frame 62 are fitted into the holes 66 of the mounting frame 23, and the screws 61 are tightened. Therefore, decorative material Y
Even if the decorative material Y is thick, by tightening the screws 61, the entire decorative material Y in contact with the lower frame 62 is pressed against the wall surface W side.

Next, after screwing the decorative plate 67 made of a synthetic resin molded product to the mounting frame 23 together with the inner frame 68 made of aluminum die-casting, the decorative handle 36 is loosely fitted into the opening of the inner frame 68 and the cylindrical rib of the decorative handle 36 is attached. 69 is pushed into the concave chamber 27b of the handle 27, the locking portions 37 on both sides of the cylindrical rib 69 are engaged with the locking claws 38 on both sides of the fixed spring 35, and the decorative handle 36 is detachably connected to the handle 27. It is. At this time, the steady rest tabs 70 at both ends of the cylindrical rib 69 also engage with the grooves 27c at both ends of the handle 27. Further, the lamp cover 41 is also attached to the makeup handle 3.
6 and is fixed by fitting into the elongated hole 36a. FIG. 11 is an exploded perspective view showing the relationship of the makeup handle 27.

The present invention includes a printed circuit board mounted with an electronic circuit that allows the load to continue operating for a certain period of time after the operation switch is turned off, and terminals such as load terminals, child device feed terminals, and common terminals, which are housed and mounted in the container. The device body is fixed to a metal mounting frame, and a part of the opening of the device body is covered by the mounting frame, and a switching element for controlling the load of the electronic circuit housed inside the device is placed in contact with the mounting frame. Because of this, the heat dissipation plate of the switching element can also be used as the mounting frame, which eliminates the need for space for heat dissipation, making the body more compact, and reducing the number of parts, thereby reducing costs. In addition, the operation switch is supported at the lower center by a small switch such as a micro switch placed on a printed circuit board and a plate-shaped stopper with one end fixed, so that it can swing freely to the left and right. It consists of a handle that pushes and drives a small switch at the bottom when it is pressed, and a spring that is compressed between the bottom of the handle and the printed circuit board, so it has a simple structure and can be used to convert commercially available small switches into tumblers. Moreover, the terminals are formed from quick-connect terminals and are stored in a terminal storage chamber provided in the body, and the opening of the terminal storage chamber is covered with a terminal cover. This has the advantage that the terminal and the external electric wire can be easily connected by the quick connection terminal, and the terminal and the circuit inside the body can be insulated by the terminal cover.

In addition, a decorative handle is removably attached to the operating switch handle exposed through the opening of the mounting frame, and the operating shaft of the variable resistor for varying the time constant of the electronic circuit mounted on the printed circuit board is attached to the through hole in the mounting frame. Since the operating shaft of the variable resistor is hidden from the outside by the decorative handle, it can be prevented from being operated by mistake, and moreover, it is easy to remove the decorative handle when making adjustments. The operating axis is exposed, allowing for easy adjustment.

Furthermore, a protrusion for receiving a printed circuit board is formed at the upper end of the terminal cover, and the printed circuit board portion on which the small switch is placed is placed on the protrusion, so that the force applied to the small switch can be supported by the protrusion. By using the terminal cover that closes the opening of the terminal storage chamber, deformation of the printed wiring board can be prevented, and the small switch can be stably driven.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of one embodiment of the present invention;
The figure is a sectional view of the main part of the handle as above, Figure 3 is a front view of a part of the lower surface of the vessel as above, Figure 4 is a perspective view of the terminal cover as above, and Figure 5 is the arrangement of the terminal cover as above. 6a and b are top views and side views of the same as above, FIG. 7 is an electric circuit diagram of the same as used in the above, FIG. 8 is an explanatory diagram of the same as the above, and FIG. FIG. 10 is an exploded perspective view of the cosmetic handle, decorative plate, etc. used in the above, FIG. 11 is an enlarged exploded perspective view of the cosmetic handle and an explanatory view of the combination with the handle, and A is a slave device. , VR is a variable resistor, SW is an operation switch, T ₁ and T ₂ are triaxes, 3 is a lighting load, 11 is a device body, 12, 13
is a printed circuit board, 14 to 16 are terminals, 19 is a terminal storage chamber, 23 is a mounting frame, 27 is a handle, 36 is a decorative handle, 42 is a terminal cover, 51 is a protrusion,
52, 52' are small switches, 57 is a through hole, 5
6 is an operating axis.

Claims (1)

[Claims] 1 A printed circuit board mounted with an electronic circuit that allows the load to continue operating for a certain period of time after the operation switch is turned off, as well as terminals such as load terminals, child device feed terminals, and common terminals, are housed and mounted inside the container, and die-casting is carried out. At the same time, the device is fixed to a mounting frame made of aluminum, a part of the opening of the device is covered by the mounting frame, and a switching element for controlling the load of an electronic circuit housed inside the device is placed in contact with the mounting frame. The operation switch is supported at the lower center by a small switch such as a micro switch placed on a printed circuit board and a plate-shaped stopper with one end fixed, so that it can swing freely to the left and right. It consists of a handle that pushes and drives a small switch at the bottom, and a spring that is compressed between the bottom of the handle and the printed circuit board, and the terminal is formed from a quick-connect terminal and is stored in a terminal storage chamber provided inside the device. A terminal cover is attached to the opening of the terminal storage chamber, and a decorative handle is removably attached to the handle of the operating switch exposed through the opening of the mounting frame. The operating shaft of the variable resistor for variable constants is made to correspond to the back surface of the decorative handle through the through hole of the mounting frame, and a protrusion for receiving a printed circuit board is formed at the upper end of the terminal cover, and the printed circuit board on which the small switch is placed is formed. A structure of an embedded switch, characterized in that a part is placed on the protrusion.