JPH043052B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a delay switch.

Hitherto, a delay switch using an oil dart pot has been provided, but it has the drawbacks that the delay time is easily affected by the surrounding environment, the reversal feeling is poor, and there is a large variation in setting time.

The present invention has been made in view of these drawbacks, and its object is to provide a delay switch structure that is easy to assemble, has a simple structure, and has low component costs.

The present invention will be explained below with reference to Examples. FIG. 1 shows a block diagram of the electronic circuit section used in the embodiment. When the operation switch SW is turned on in this circuit, the switch operation detection section 1 detects that the operation switch SW is turned on and sends the signal to the delay circuit 2. When the switching circuit 3 is turned on, the switching element of the output section 4 is turned on, and the lighting load 5 is turned on.
t ₁ in FIG. 2 indicates the lighting point. When the operation switch SW is turned off, the output of the switch operation detection section 1 is delayed for a certain period of time by the delay circuit 2 and stops, so that the lighting of the lighting load 5 is maintained for that certain period of time, as shown in FIG. The operation switch
When a certain period of time has elapsed from SW OFF operation time t ₂
At _t3 , the lighting load 5 is turned off. Therefore, in this embodiment, by setting the time constant of the delay circuit 3 to a predetermined value in advance, a stable delay operation can be obtained without being affected by the surrounding environment. Figure 3 shows a circuit diagram that embodies the circuit block in Figure 1, and shows the operation switch.
The switch operation detection unit 1 of the SW is composed of a current transformer CT etc. connected to a series circuit of a lighting load 5 and an AC power source 6 via an operation switch SW, and when the operation switch SW is turned on, a secondary It is designed to generate output. The delay circuit 2 charges the capacitor C1 with the DC obtained by rectifying the secondary output with the diode bridge DB1, and uses the charging voltage of _the capacitor _C1 to charge the field effect transistor FET of the switching circuit 3. is used to control the switching of transistors Q ₁ to _{Q 3} and to control the firing of thyristor SCR. When the voltage across the capacitor _C1 is at the Zener voltage of the Zener diode _ZD1 , the switching circuit 3 turns on the thyristor SCR by the switching operation of the field effect transistor FET and the transistors _Q1 to _Q3 , and turns on the diode bridge.
The triax T ₁ of the output section 4 is ignited via the DB ₂ and is turned on to light the lighting load 5 . Then, when the operation switch SW is turned off, the charge in the capacitor _C1 of the delay circuit 2 is discharged via the variable resistor VR, and during this discharge period, the switching circuit 3 is turned off until the field effect transistor FET is turned on. is designed to maintain the ON operation of the thyristor SCR to maintain the ON state of the triac _T1 , and when the field effect transistor FET turns on, the thyristor SCR is turned off to stop the firing of the triac _T1 and the delay circuit is turned off. The second transistor Q ₄ and Q ₅ are turned on to quickly discharge the charge in the capacitor C ₁ . In the figure, ZNR is a surge absorber and NE is a neon tube.

Now, such an electronic circuit section is mounted on two printed circuit boards 7 and 8, as shown in FIGS. 4a to 4c. These two printed circuit boards 7 and 8 are connected by a flat cable 9, and electronic components such as capacitors and transistors are placed on the top surface of the printed circuit board 8, which is the lower side when placed, and electronic components such as capacitors and transistors are placed on the upper surface of the printed circuit board 7, which is the upper side. is the variable resistor VR of the delay circuit 2
, triax _T1 of the output section 4, etc. are arranged,
A current transformer CT is installed on the bottom surface.

Figure 5 shows a container 1 that houses printed circuit boards 7 and 8.
The figure shows an exploded perspective view of part 0. The container body 10 is made of a synthetic resin molded product, and one side has a storage recess 11 for storing printed circuit boards 7 and 8, and the other side has an operation switch SW. A storage recess 16 is formed to store the movable contact plate 12, the support plate 13, the power supply terminal 14, the load terminal 15, and the like. The lower printed circuit board 8 has sixth holes on both sides of the bottom of the storage recess 11.
It is fixed by placing both sides on a stepped portion 17 formed as shown in the figure and tightening a mounting screw 20 into a screw hole 19 provided in a base portion 18 protruding from the bottom. On the other hand, the upper printed circuit board 7 is the sixth
As shown in the figure, it is placed on a mounting table 21 that protrudes along the wall surface of the container 10, and is mounted on a printed circuit board holder 23 formed at the lower end of a cover 22 that is placed on the storage recess 11. It is held between the support body 10 and the cover 22. On the other hand, each terminal 14 is placed in the storage recess 16.
...and the operation switch SW are stored as follows.

That is, the storage recess 16 is partitioned by partition walls 24, 25, and 26, and a pair of locking springs 2 are placed in the recess 16a surrounded by the partition wall 24 and the peripheral wall of the container body 10.
7, 27 are housed in parallel, and the terminal plate parts 28a, 28a, into which the terminal fittings 28 are fitted from above and can hang down on both sides of the terminal fittings 28, are placed parallel to the locking springs 27, 27, and these terminal plate parts 28a, 28a and The locking springs 27, 27 constitute a common terminal 29 and a power supply terminal 15. 30 is disposed between the locking springs 27, 27, and is connected to the locking springs 27, 27 and the terminal plate portion 2.
This is a release button for releasing the conductor locked and held between 8a and 28a. A support plate 13 constituting the opening/closing mechanism of the operating switch SW is disposed at the bottom of the recess 16b between the partition walls 24 and 25. The protrusion 12a is fitted and supported, and the movable contact plate 12 is arranged so as to be swingable in both directions. A locking spring 27' constituting the load terminal 14 and a locking spring 2 are provided in the recess 16C between the partition wall 25, the peripheral wall of the container body 10, and the partition wall 26.
7' and a terminal fitting 32 disposed in parallel to the terminal fitting 32 for locking and holding the conductor.
A connecting fitting 33 electrically connected to the terminal fitting 32 is housed therein, and a release button 34 for releasing the conductor locked by the locking fitting 27' and the terminal fitting 32 is housed therein.
A portion of the terminal fitting 32 is introduced into the recess 16b surrounded by the partition walls 25 and 24 through a gap 25a formed in the partition wall 25, and the movable contact plate 12 is inserted into the side surface of the recess 16b.
A fixed contact 32 that opens and contacts the movable contact 12a of
A is provided and forms part of the opening/closing mechanism of the operating switch SW. Furthermore, display bodies 35 are housed in the recesses 16a and 16c, respectively, so as to correspond to the respective terminals 14, 15, and 29. These display bodies 3
5, a coil spring 36 attached to the upper end comes into elastic contact with the lower surface of the cover 22 that is attached to the storage recess 16 and is biased downward, so that the rod-shaped lower end of the coil spring 36 is attached to the container body as shown in FIG. A jig for pressing the release buttons 30 and 34 provided on the lower surface of the container 10 protrudes outward from the end of the insertion hole 37, and a conductor is inserted through the conductor insertion hole 38 drilled on the lower surface of the container 10. When connecting to the respective terminals 14, 15, 29,
When the display body 35 hits the inclined surface of the protruding piece 35a of No. 5, the display body 35 moves upward and retracts the protruding lower end into the container body 10, so as to display that the conductor of the electric wire has been inserted. It's summery. Reference numeral 38 in FIG. 5 is an operating body of the operating switch SW, and a cylindrical projection 39 is integrally provided on the lower surface of this operating body 38, and a spring 40 is inserted into this projection 39. The lower end of the movable contact plate 12 is fitted and fixed to the protrusion 12c provided at the upper end of the movable contact plate 12, and the slit groove 41 provided at the lower end of the protrusion 39 is fitted and connected to the upper end of the movable contact plate 12.

However, as shown in Fig. 8, each terminal 14, 15, 2
9 etc. are stored in the storage recess 16, and after the printed circuit boards 7 and 8 are stored and arranged in the storage recess 11, a cover 22 shown in FIG. 9 is attached to the opening of the storage recess 18, The operating body 38 is fitted into the opening window 42 of the cover 22 from below. At this time, the lower end surfaces of the inner recesses formed on both sides of one end of the cover 22 are positioned exactly on the upper printed circuit board 7 to constitute the above-mentioned printed circuit board holder 23, and the printed circuit board 7 is
is held between the mounting table 21 and the mounting table 21. Now, the flat surfaces on both sides of the attached cover 22 form substantially the same plane as the upper end surface of the peripheral wall of the storage recess 11 of the container stand 10. In this state, the container body 10 and the cover 2 are fixed by the fixing screws 44, 44, which are inserted into the aluminum die-cast mounting frame 43.
2 is integrally fixed to the mounting frame 43. 45
is the screw hole. At this time, the protruding portion of the upper surface of the cover 22 is fitted into the opening 46 of the mounting frame 43 and protrudes toward the upper surface of the mounting frame 43. Also vessel 10
The storage recess 11 side is covered by a part of the mounting frame 43. At this time, the operating shaft 47 of the variable resistor VR is fitted into the hole 48 of the mounting frame 43, and the hole 50 of the mounting portion and heat sink plate 49 of the triax _T1 faces the insertion hole 51 of the mounting frame 43. . Below this hole 50 is a screw hole for a spacer 54 screwed onto the printed circuit board 7, and as shown in _FIG. By inserting the spacer 50 and tightening it into the screw hole of the spacer 54, the mounting portion/heat radiating plate 49 comes into close contact with the lower surface of the mounting frame 43, and the mounting frame 43 constitutes the heat radiating plate of the triac _T1 . Here, by painting the mounting frame 43 black, the heat dissipation effect is enhanced.
When mounting the triax T ₁ on the printed circuit board 7, first fix the spacer 54 at a predetermined position on the printed circuit board 7 with the screw 53, and then attach the terminal of the triax T ₁ to the printed circuit board 7 on one side with the pattern side facing upward. The hole 50 drilled in the heat dissipation plate 49 which also serves as the mounting part is connected to the spacer 54.
facing the screw hole. (At this time, try
A homing process may be applied to the upper surface of T ₁ so that it can be brought into close contact with the lower surface of the mounting frame 43 after assembly. ) However, as shown in Figure 11a and b, the mounting frame 4
When installing the delay switch of the present invention, in which the device body 10 is fixed to the structure 3, on a construction surface, the lower frame 57, middle frame 58, plate body 59, etc. shown in FIG. 9 are used. That is, as shown in FIG. 12, the fixing screw 61 is inserted into the mounting hole 60 of the mounting frame 43, and the embedded box X is fastened to the construction surface W. Next, cut out the decorative material Y such as the cloth to expose the switch body. After loosening the fixing screws 61, the lower frame 57 is attached to the lower surface of the mounting frame 43. In this case, first, the fixing screw 61 is loosely fitted into the notch 62, and the mounting frame 43 is positioned on the lower frame 57 through the opening 63. Therefore, the lower frame 57 can be attached to the lower surface of the attachment frame 43 without removing the attachment frame 43. Then, the mounting frame 43 is placed on the contact portion 64 of the lower frame 57, and the lower frame 5
7 is fitted into the hole 65 of the mounting frame 43, and the fixing screw 61 is tightened. Therefore, decorative material Y
Even if the decorative material Y is thick, by tightening the fixing screws 61, the entire decorative material Y that is in contact with the lower frame 57 is pressed against the construction surface W side. Next, the fixing screw 66
After fixing the plate main body 59 to the mounting frame 1 using Push the projection 73 of the cylindrical rib 70 onto the locking piece 72 of the fixing spring 71.
is locked to form the operation switch SW. In this case, by fixing the middle frame 58 to the mounting frame 43 and forming the contact portion 82, the operating handle 6
7, and even when the operation handle 67 is larger than the operation body 38, the reversal angle can be ensured at the normal position. The middle frame 58 is made of die-casting, and as shown in FIG. 14, stepped portions 75 that engage with the locking claws 74 are provided on the outside of both ends of the middle frame 58, and contact portions are provided on the inner periphery. 82 is formed to protrude inward, and this middle frame 58 is placed on the support portion 76 of the plate main body 59. At this time, the locking pawl 74 is fitted into the stepped portion 75 to integrate the middle frame 58 and the plate main body 59.

Note that l ₁ , l ₂ , and l ₃ in Fig. 5 represent the electronic circuit and the support plate 13;
The connection fitting 33 that contacts the load terminal 14 and the lead wire that connects the terminal fitting 28, respectively, and 77 in FIG. The press-fitting protrusion 80 of the spring 71 is a vibration prevention rib provided on the cylindrical rib 70 of the operation handle 67 that engages with the vibration prevention groove 81 provided on the peripheral wall of the operation body 38 .

The present invention has two electronic circuit parts that are divided and mounted to turn on the load for a certain period of time after the operation switch is turned off.
One of the two printed circuit boards is screwed onto the bottom side of the container, and the other printed circuit board is placed above the one printed circuit board with an insulation transformer of the insulated electronic circuit section interposed between them. Since the printed circuit board on which the electronic circuit section is mounted can be stored in the upper and lower directions, the lateral dimensions of the container can be reduced, and the opening of the container can be Since the switching element for load control of the electronic circuit section attached to the other printed circuit board is fixed in contact with the metal mounting frame that covers a part of the board and attaches the device, the heat dissipation of the switching element can be fixed. It has the advantage that it can be carried out in a frame, there is no need to provide a special heat dissipation means, and it is inexpensive. The mounting screws inserted through the mounting frame and the mounting holes of the switching element are screwed into the spacer with a spacer interposed between them, so if an external force is applied with the terminal wired to the printed circuit board, the terminal will When screwing the mounting screw into the spacer by inserting it through the mounting hole provided in the metal mounting frame and the heat sink that also serves as the mounting part of the switching element, in an unstable state where the spacer is bent, Even if the mounting screw hits the heat sink that also serves as the mounting part and an external force is applied to the heat sink that also serves as the mounting part, the spacer supports the heat sink, and as a result, an excessive external force is applied to the terminal of the switching element, causing the terminal to This has the effect of preventing troubles such as bending of the spacer and making it easier to screw the mounting screw into the spacer.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an electronic circuit section used in an embodiment of the present invention, FIG. 2 is a time chart for explaining the operation of the same circuit, FIG. 3 is a specific circuit diagram of the same electronic circuit section, and FIG. 4 a, b, and c are top, side, and bottom views of the printed circuit board used in the above, Figure 5 is an exploded perspective view of the main parts of the same, Figure 6 is a partial sectional view of the same, and Figure 7 is the same as the above. Figure 8 is a bottom view of the vessel body, Figure 8 is a perspective view of the vessel body before the cover is attached, Figure 9
The figure is an exploded perspective view of the same member excluding the body part, Figure 10 is an enlarged sectional view of the main part of the same as above, and Figures 11a and b
12 is a sectional view for explaining the installation state of the above device, and FIG. 13 is an enlarged exploded perspective view of the operating section of the above operation switch. , FIG. 14 is an enlarged sectional view showing the mounting relationship of the above mounting frame, where SW is an operation switch, CT is a current transformer, _T1 is a triax, 5 is a lighting load, 7 and 8 are printed circuit boards, and 10 is a vessel, 43
50 is a mounting frame, 50 is a hole, 54 is a spacer, and 52 is a mounting screw.

Claims (1)

[Claims] 1 One of the two printed circuit boards on which the electronic circuit section that lights up the load for a certain period of time after the operation switch is turned off is mounted separately is screwed to the bottom side of the container, and the other printed circuit board is insulated. a metal mounting frame disposed above one of the printed circuit boards with a transformer interposed therebetween, housing both printed circuit boards in the body, and covering a part of the opening of the body parallel to the other printed circuit board; A delay switch in which the above-mentioned device body is attached to the above-mentioned other printed circuit board, and a switching element for load control of the electronic circuit part, which is bent at a substantially right angle in the middle of the terminal attached to the above-mentioned other printed circuit board, is fixed in contact with the above-mentioned metal mounting frame in parallel. In this structure, a spacer is interposed between the heat dissipation plate that also serves as the mounting part of the switching element and the other printed circuit board, and a mounting screw inserted through the mounting frame and the mounting hole of the switching element is screwed into the spacer. A structure of a delay switch characterized in that the switch is closed.