JPH0498719A - Switch with display lamp - Google Patents

Abstract

PURPOSE:To reduce a variation in luminance of a display element according to a load current and facilitate installation by providing a rectifier block and a display block connected to light emitting diodes, and disposing a detachable locking means in a fixing frame. CONSTITUTION:A switch main body A comprises a rectifier block 1, a display block 2 and a switch unit SW of a switch mechanism portion. Via the rectifier block 1, diodes D1-D4 are connected to each other in a bridge manner. Furthermore, an anode of a diode D5 is connected to a contact point of cathodes of the diodes D1 and D4 while a cathode of the diode D5 is connected to a contact point of anodes of the diode D2 and D3. The switch main body A interposed between a power source V and a load L is detachably installed in a standardized fixing frame, and locking pawls 31 are projected sideward on both sides of a cover 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a switch with an indicator light that allows confirmation of the operating state of a load.

[Prior Art] Conventionally, in the second type of switch with an indicator light, a current transformer is inserted into the main circuit (1-4 current transformer), and an output is obtained from the secondary side according to the magnitude of the load current. The display element was lit by the output.

[Problems to be Solved by the Invention] In such conventional examples, manufacturing costs are high because a current transformer is used, and the secondary current of a current transformer varies depending on the magnitude of the primary current, so the display element There was a problem that the brightness of the image changed.

The present invention has been provided in view of the above-mentioned points, and it reduces the change in brightness of a display element due to the magnitude of load current, and also facilitates the connection of electric wires to the switch body.
The present invention also provides a switch with an indicator light that is intended to be easily mounted on a mounting frame.

[Means for Solving the Problems] The present invention connects diodes in a bridge shape, and
5. Ma pro-tsuku with a diode connected between the midpoints of each side; The display block with a light emitting diode connected between the terminals of the second M flow block J Shiyu I, the terminal board that connects to the external wire, the locking spring that presses the terminal weak wire, and the locking spring A are pressed together. A release button for releasing the electric wire from the terminal plate is provided inside the main body, and a locking means that can be detachably attached to the mounting frame is provided on the outside of the main body.

(Thus, the voltage drop of the rectifier block is used to light the light emitting diode of the display block with a small change in brightness, and the terminal board, lock spring and release button are used to close the wires. This makes it easy to connect and disconnect, and also makes it easy to attach the switch body to the mounting frame.

[Embodiment 1] Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1st
The figure shows a circuit diagram of the switch main body A, and its electrical circuit configuration includes a rectifier block 1, a display block 2, and a switch section SW of an opening/closing mechanism section. The rectifier block 1 has diodes D, -D connected in a bridge shape, and further, the anode of the diode D is connected to the connection point between the colored diodes D1 and D, and the diodes D,
The cathode of is connected to the connection point between the anodes of the diode D2. Display Pro 2 has two light emitting diodes LEDs connected in parallel in opposite directions, LED2,
It is composed of a protective resistor R. The display block 2 is connected to the input and output terminals of the rectifier block 1. still,
A choke coil may be used instead of the protective resistor R mentioned above.

The switch body A is interposed between the power supply ■ and the load node. Now, when the switch part SW is on, the diodes D, -D are AC power sources, so the current in the direction of the solid line and the current in the direction of the broken line alternately flow. That is, in the positive half cycle of the AC power supply, as shown by the solid arrow, the diode D1→D.

-'D3- Load and current flow, and in the negative half cycle,
Current flows from load L to diode D, →D, and →D2. Since the voltage drop across the diodes D, . Therefore, the potential difference between -i and b of the light emitting diode LED,
Since a nearly constant current is supplied to the LED, the brightness of the light emitting diode LED2 does not change much.

The brightness is almost constant.

Now, the forward voltage drop per diode is:
The voltage is about 0.7V. In addition, the forward voltage drop of a light emitting diode is, for example, in the case of a gallium phosphide device,
It is about 1.8V, and the voltage of gallium aluminum arsenic element is about 15V, so light emitting diode LED,
, LED2 requires three diodes connected in series. In the present invention, when diodes D and ~D are connected as shown in FIG. 1, current flows in the same direction through diode D regardless of the direction of the load current.
A total of five diodes is sufficient.

However, when a series circuit of three diodes is connected in parallel as shown in FIG. 2 to light a light emitting diode, a total of six diodes are required. −
) By connecting 1 and 2 to 6 as shown in Figure 1, the diode can be reduced by 1 wA.

By the way, it is possible for a switch with a built-in semiconductor to fail due to factors such as inrush currents when the power is turned on, induced lightning surges induced in the tJIJ line, and electrostatic discharge that a person receives when operating the device, resulting in non-conductivity. A possible solution is possible.

FIG. 3 shows the current waveforms of the diodes D, ~D, in the circuit of FIG. Figure (e) shows the diode D2. The figure (d) shows the current of D3 and the current of diode D, respectively. Diode D.

Compared to the other diodes D1 to D, in which current flows only in one half cycle, diode D has a high probability of failing and becoming non-conductive because current flows in both half cycles. When the diode D becomes non-conductive, the entire rectifier block 1 becomes non-conductive, and the load current is transferred to the display block 2.
Everything will flow to. This means that if the load current is within the rating of the light emitting diode LED2 and P, switch body A can be used without any problem.
, P, tt light emitting diode LED,, LED? In case of failure j-11, main body A becomes non-conducting.

Second point, in the case of a circuit like the one shown in Fig. 2 above in which a plurality of 1) diodes are connected in series and parallel, the diodes D1 to D
There is a fixed probability that all 6 will fail, and even if diode D1 fails and -) the load current changes to light emitting diode L
ED,, above the rating of LED2, light emitting diode LED
,, If LED2 fails, a half-wave rectified current as shown by the broken line will flow through the circuit. Incidentally, since the rated current of a light emitting diode is as small as several tens of mA, the load current is usually higher than the rated current.

Conditions like 2 will have a negative impact on the load and reduce Ik.
I! In the case of IA, there is a risk of load failure or burnout, which is dangerous. However, with the circuit configuration shown in FIG. 1 of the present invention, there is a high probability that the entire switch body A becomes non-conductive, as described above, and failure occurs in a safe mode.

Figure 4 shows how the conventional switch with built-in force and current is connected to the switch body of the present invention. i? This is a comparison of the brightness of tfL and a light emitting diode. As is clear from FIG. 4, the change in brightness of the switch body A of the present invention is smaller than that of the current transformer type, regardless of the magnitude of the load current. Further, the appropriate resistance value of the protective resistor R is approximately 100Ω when the light emitting diode is a gallium phosphide element, and approximately 400Ω when the light emitting diode is a gallium aluminum arsenide element. Also, when a choke coil is used instead of the protective resistor R, the inductance is set so that it has the same impedance at the commercial frequency.

Next, the specific structure of the switch body A will be explained with reference to FIGS. 5 to 8. The outer shell of the switch main body A is composed of a body 4 and a cover 5, and terminal portions 6 are formed on both sides of the body 4 to be connected to electric wires from the outside. The terminal section 6 is composed of a substantially U-shaped terminal plate 7, a substantially S-shaped locking spring 8 for press-connecting the conductor of the electric wire to the terminal plate 7, and a release button 9 for releasing the electric wire. There is. At the bottom of the body 4, in order to pass the main wire through, there are 7 + wire insertion holes 10, release holes 11 for pressing the release button 9, and inserting the tip of a dry nozzle, etc.
is being drilled.

A rib 12 made of an insulating material is integrally protruded from approximately the center of the body 4, and a storage portion 13.1 is provided at the border of the rib 123.
4 is formed. An opening/closing mechanism section is stored in one of the storage sections 13. That is, the support plate 15 electrically connected to one terminal plate 7 is arranged at the bottom of the storage section 13,
A substantially U-shaped opening/closing body 1 is mounted on a protrusion 16 formed on the support plate 15.
7 are arranged so as to be swingable. A movable contact 18 is fixed to one side of the opening/closing body 17, and a fixed contact 19 facing the movable contact 18 is provided on the other terminal plate 6.

A handle 21 is provided in the opening 20 of the cover 5, and the lower surface of the actuator 22 protruding from the lower surface of the handle 21 comes into contact with the upper end of the opening/closing body 17.
By operating the opening/closing body 17, the contact point 18.
It is designed to open and close 19 times. Furthermore, this contact point 18
．． 19 constitutes the SW I 1000 SW shown in FIG.

Inside the other storage section 14, a diode D of the rectifier block 1 is placed.
1-t) Printed circuit board 2 on which 57i and protective resistor R are mounted
3 will be delivered. Further, a display body 24 in which the light emitting diodes LEDs of the display program 2 are integrated is mounted on another printed circuit board 25, and the negative printed circuit board 25 is fixed to the lower surface of the handle 21. Both printed circuit boards 23 and 25 are connected by leads 4!26. , 2, 2', Grooves 27 and 28 are formed in the printed circuit boards 23 and 25, respectively, and the soldering ends of the lead wires 26 are slightly slackened from the soldering portions, and the lead wires 26 are connected to the ends of the leads 27.
It is fixed at 28. This is to prevent the soldering of the lead wire 26 from breaking even if the handle 21 is reversed. Further, the printed circuit board 23 and the terminal board 7 are also connected by lead wires 29.

Display body 24 of printed circuit board 25 fixed to handle 21
The upper surface of the handle 21 is located in correspondence with the display hole 30 of the handle 21, so that the load condition can be visually checked from the outside of the handle 21.

Here, the switch main body A of the present invention is formed in a size corresponding to one wiring device module according to the standard 1, and is designed to be detachably mounted on a standardized mounting frame. On both sides of the fifth cover, there are locking claws 31 projecting laterally for attachment to the mounting frame.

Figure 9 shows a plate frame 32 to which the switch body A is mounted.
This figure shows an exploded perspective view of the trough installed on the mount.

This plate frame 32 is large enough to accommodate three switch bodies A each having the size of one standardized wiring device module. In addition, the body 4 and cover 5 of the switch body A
are connected to each other by an assembly frame 33, and a locking pawl 31 constituting the above-mentioned locking means is formed on this assembly frame 33. A pair of locking holes 34 are formed in one flange piece of the plate frame 32, into which a pair of locking claws 31 on one side of the switch body A are inserted and locked. Further, a bending piece 35 that can be bent laterally is integrally formed on the other side piece of the plate frame 32.
The other pair of locking claws 31 of the switch body A are inserted and locked into the pair of locking portions of the flexible piece 35, and the switch #A
It is designed to be detachably attached to the plate frame 32. Further, the plate frame 32 is provided with a mounting hole 36 through which a screw is inserted for mounting on a switchboard buried in the wall surface.

A decorative plate 37 is attached to the front surface of the plate frame 32, and an engaging claw 38 is protruded from the back surface, and by fitting the engaging claw 38 into the engaging hole 39 of the plate frame 32, , a decorative plate 37 is detachably attached to the plate frame 32. The decorative plate 37 also includes a switch body A.
An opening 40 is bored through which the handle 21 of the handle 21 is exposed.

[Embodiment 2] A push-button switch 45 shown in FIG. 10 has a body 45a made of synthetic resin and a cover 45b made of synthetic resin, and has a body locking body that hangs down from a pair of opposing sides of the cover 45b. Connect the body locking hole 50m provided in the leg 50 to the body 4.
It is connected by being locked to the locking protrusion 49 of 5a.

The wall 45b is further provided with both I! mounting frames 42 shown in FIG. 17 on both sides. l! Stop claws 51a corresponding to the pair of locking holes 48, which are bored in the vertical sides of the I bases 12b and 42b, respectively;
51b are respectively provided protruding from the wood, and a space 12 is formed at the back of one of the stopper claws 51b to obtain a deflection margin consisting of a hole vertically penetrating the outer wall of the cover 45b.
b can be elastically bent inward.

As shown in FIG. 10, there are protrusions 9 on both sides of the middle frame 99.
9a is provided in a protruding manner, and these protrusions 99a are pressed into contact with the inner surfaces on both sides of the body 45a, so that the middle frame 99 is press-fitted and fixed into the body 45a. At this time, the tips of the substantially triangular protrusions 99a are fitted while being crushed. In this way, the body 45a has the middle frame 99 fitted into the central storage part 63, the rectifying block 1 arranged on the lower surface side of the middle frame 99, and the connection terminal storage parts 53.
54, and one connection terminal storage section 53 has a common terminal board 55. ## A quick connection terminal consisting of a spring 56 and a release button 57 is stored, and the other connection terminal storage part 54 houses a terminal plate 58 constituting a first connection terminal part, an I[R spring 59 and a 5 second connection A terminal plate 60 and a locking spring 61 constituting the terminal portion are housed therein, and a release button 62 common to the first and second connection terminal portions is housed therein.

The common terminal plate 55 is connected to the body 45a via the electric current block 1.
It is connected to the support plate 55a of the opening/closing body 64 arranged at the bottom of the central storage part 63.

The terminal plate 58 is provided with an extending piece 58a, which extends over the partition wall 54a and into the central storage portion 63, and is also close to the wall 54a. A fixed contact 65a is provided on the installation piece 58a.

The terminal plate 60 is extended into the central storage portion 63 along the inner wall of the body 45a, and its tip is bent along the partition wall of the connection terminal storage portion 53, and the fixed contact 65a is attached to the tip of the bent piece 60a. A corresponding fixed contact 65b is provided.

A printed circuit board 66 on which the display block 2 is mounted is placed on top of these terminal boards 58 and 60, and each terminal board 58.
．． A terminal 581) 60b protruding from the terminal 581) is connected to a contact 66a of the printed circuit board 6J).

The opening/closing body 64 is formed of a conductive plate, and is inserted into the central storage section 63, with protrusions 68 provided at the bottom of both ends fitted into ■-shaped recesses 67 provided on the side walls and middle frame 99 of the central storage section 63. With the lower edge in contact with the support plate 55m, V
It is rotatable around the lower part of the shaped recess 67. Then, the movable contacts 69 provided on both upper surfaces of the opening/closing body 64 are brought into contact with and separated from the fixed contacts 65a and 65b according to the rotation, and the common connection terminal portion and the first. Alternatively, the connection with the second connection terminal section can be turned on or off.

The coil spring 7 drives this opening/closing body 64 in reverse.
0, a reversing handle 71, a push button handle 72, a slide cam 73, and the like.

The lower part of the coil spring 70 is engaged with a spring seat 64a provided on the bead of the horizontal piece of the opening/closing body 64, and the upper part is inserted into a cylindrical part 71a that is integrally provided with the lower part of the reversing handle 71 to reverse the operation. According to the movement of the handle 71 in both directions, the opening/closing body is reversely driven by 64 minutes.

The reversing handle 71 is inserted into the recess 91 from below through a hole 92 opened at the bottom of the four parts 91 of the cover 45b, and the inverted triangular shafts 71c provided on both sides of the lower cylindrical part 71a of the reversing handle 71 are inserted into the cover 45b. It is rotatably supported on a bearing 90 on the inner wall of the reversing handle 71, and engaging protrusions 74 and 74 that engage with the slide cam 73 are provided protruding from both open upper portions of the rectangular parallelepiped portion 71b at the top of the reversing handle 71.

The push button handle 72 has a locking protrusion 7 in a vertical locking groove 75 formed on both inner wall surfaces of the recess 91 of the cover 45b.
6.76 is locked and housed in the recess 91 so as to be movable up and down, and the two return spring pieces 77a, 77a are extended downwardly from the child piece 77b and are integrally extended downward. The return spring 77 is attached to the lower surface of the push button handle 72 by inserting a protrusion (not shown) protruding from the lower surface of the push button handle 72 into a hole 77d formed in the child piece 77b, and the return spring of the second return spring 77 is attached to the lower surface of the push button handle 72. By having the tip of the piece 77-1 77a come into elastic contact with the bottom surface of the recess 91, it is always urged upward.

As shown in FIG. 10, the slide cam 73 is made of highly elastic thermoplastic resin such as polyacetal and is molded into a substantially mouth shape, and has a corresponding engagement protrusion 74 of the reversing handle 71 on the lower surface of the opposite side. A protruding engaging cam body 78 is provided, and further f)ll! A pair of spring pieces 73a, 73a are integrally provided in the center of one side, and a protrusion 72A formed on the lower surface of the push button handle 72 is inserted between the tips of the spring pieces 73a, 73a. A slide cam 73 is slidably mounted on the lower surface of the push button handle 72, and the elasticity of the spring pieces 73a provides a return force in the counter-sliding direction.

A rectifier block 1, a display block 2, a neon tube, a resistor R1, a diode D for preventing back electromotive force shown in FIG. 10...
constitutes a circuit for displaying the on/off state of the switch body, and when a three-way circuit is constituted by the pushbutton switch 45, one connection terminal section to which one end of the power supply is connected, and one side fixed contact 65b, and a movable contact 69 of the opening/closing body 64.

When a current flows between the support plate 55a, the rectifier block 1, the common terminal plate 55, the load, and the other end of 5'z#, the current flows between the common terminal plate 55 and the support plate 55a of the opening/closing body 64. The display block 2 is turned on by utilizing the voltage drop of the rectifier block 1 inserted in the display block 1. In addition, the switching body 64 is reversed, and the movable contact 69 is switched and connected to the other fixed contact 65a, and the load is turned off.The circuit consisting of the neon tube and the resistor R1 is connected between both connection terminals. A single power source causes a current to flow through the tube, causing the neon tube to light up. The circuit configuration is shown in FIG. 18. The cover 45b is provided with a window 80, and a lamp cover 81 is attached to this window 80 so that the light from the display block 2 and neon tubes can be seen. It has become.

The push button switch 45 configured in this way is inserted into the window hole 46 of the metal mounting frame 42 from below through the cover 45b as shown in FIG.
If the lower end of the edge of one side piece 42b of the mounting frame 42 is in contact with the upper surface of the periphery of the cover 45b, the locking claw 5 on the fulcrum side can be rotated by the second contact point as a fulcrum.
+, TL engages in the locking hole 48, and the other J) side piece 42b
The lower end of the edge of the locking claw 51b is the deflection margin of the space 52,
The cover 45b is pressed inward by the elastic force of the material to overcome the locking claw 51b, and the locking claw 51b is inserted into the locking hole 4.
The push-button switch 45 is fixed by engaging the six locking claws 51 a and 5 l b into the locking holes 48 and 48, respectively, with the push-button handle 72 protruding from the window hole 46 of the mounting frame 42. let

Push button switch 4 attached to the mounting frame 42 as shown in 2.
5 is attached with a piano handle 83. As shown in FIGS. 11 and 17(b), this piano handle 83 has a fulcrum rib 83a provided on one side edge rotatably locked in a recess 94 on one side of the cover 45b. A locking leg 83b formed on the other gs edge of the piano handle 83 is installed in a locking space 87 on the other side of the cover 5a so as to be vertically movable. By pushing the other side of the piano handle 83, the piano handle 83t becomes freely rotatable using the fulcrum lever 83a as a fulcrum. : The push button handle 72 can be pushed and driven by pushing and rotating it. The second via/hurdle 83 has a transparent window 83C that allows the light from the neon tube and display block 2 to pass through.
is perforated.

Next, the operation of the piano handle type switch of the present invention will be explained based on FIGS. 11 to 15.

First, when the piano handle 83 is pushed down in FIG. 11(a), the push button handle 72 is pressed down as shown in FIG.
Push down against the return spring piece 77a, and press the push button handle 7.
2, the slide cam 73 is lowered, and the vicinity of the base of the inner inclined surface of the engaging cam body 78 at one end of the slide cam 73 (left side in FIG. 12(a)) is tilted. When the push button handle 72 is further pressed, the engaging protrusion 74 is pushed down along the inner slope of the engaging cam body 78, and the reversing handle 71 is reversed. Rotate. In this case, as the reversing handle 71 is reversed by pressing down the push button handle 72, the polishing protrusion 74 is
Fig. 1-4121 Rotates counterclockwise in 11 i A, y, h, and in the second rotation, the latch cam body 78 resists the spring peak 73a by the latch protrusion 74. Slide it to the left as shown in (b).

Even if the reversing handle 72 rotates beyond the horizontal position during the reversal of the reversing handle 72 and the other engaging protrusion 74 rises, the slide cam 73 slides to the left and the other end (the second In 1411ffi (b), the right side) engaging cam body 78 is located to the left of the right side engaging protrusion 74, so that it does not interfere with the reverse rotation of the reversing handle 71.

Here, if an inner inclined surface is formed inside the engaging protrusion 74 of the reversing handle 71, the inner inclined surface will prevent the engaging cam body 78 located inside from interfering when the engaging protrusion 74 rotates upward. I can run away. In addition, when the reversing handle 71 is reversely rotated by pressing down the push button handle 72 as described above, the spring piece 73 of the slide cam 73 is
By reversing the reversing handle 71 while sliding the slide cam 73 against resistance a, the reversing handle 71 can be smoothly rotated in reverse without receiving low sliding resistance between the reversing handle 71 and the slide cam 73. can.

When the reversing handle 71 is reversely rotated as described above, the coil spring 70 is reversely swung, the opening/closing body 64 is reversed, and one of the fixed contacts 65a with which the movable contact 69 is in contact
It separates from the contact point 65b and contacts the other fixed contact point 65b.

After this reversal, when the push-down force on the piano handle 83 is released, the return spring piece 77a of the return spring 77 causes the push button handle 7 to
2 is pushed up, and the piano handle 83 also returns to its original state. At the same time, the slide cam 73 also has a spring piece 73.
It slides back to the center part by the spring force of a, and becomes as shown in FIG. 15.

In this state, if the piano handle 83 is pushed down, the opening/closing body 64 can be reversed by the same operation as described above. After this reversal, if the downward force on the piano handle 83 is released, the state will return to the state shown in FIG. 12.

[Effects of the Invention] As described above, the first invention has a rectifier block in which diodes are connected in a line-shaped configuration, and a rectifier block is connected between the midpoints of each side with a diode, and the input and output of the second rectifier block. A terminal board that connects a light emitting diode between the ends and connects it to the fS display pro-tsuku and the wires of the external force bow, and an iI that presses the wires of the terminal board.
The i-lock spring, the release button that presses the M-lock spring and releases the wire from the terminal board, and the locking means that can be detachably attached to the mounting frame are installed on the outside of the switch body. However, by using the voltage drop in the rectifier block to light the light-emitting diodes in the display block with a smaller change in brightness, it can be manufactured at a lower cost than the conventional method using a current transformer. However, since the light emitting diode is lit using the voltage drop of the diode, the change in the brightness of the light emitting diode due to the magnitude of the load current is small. This has the effect of making it easier to connect and disconnect the @ line, and also to make it easier to attach the switch body to the mounting frame.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of an embodiment of the present invention Fig. 2 is an explanatory diagram of the same as above, Fig. 3121 is an operation waveform diagram of the same as above, and Fig. 4 is a characteristic showing the negative igy current and light emitting diode (light-emitting diode) brightness as above. figure,
Figure 5 is a cross-sectional view of the main body of the same as above, Figure 6 is a plan view of the same with the cover removed Figure 7 is a perspective view of the main parts of the same, and Figure 8 is a front view of the main parts of the same. , FIG. 9 is an exploded perspective view showing the construction state of the same as above, FIG. 10 is an exploded perspective view of the push button switch of Example 2 of the same as above, FIGS. Figures 15 to 15 are explanatory diagrams of the same operation as above, Figure 16 is a sectional view of the same as the above, Figure 17 (a) is an exploded perspective view of the same as the above, and Figure 17 (b) is a view of the piano handle as seen from the back side of the same as the above. The perspective view and FIG. 18 are the same circuit diagrams. 1 is a rectifier block, 2 is a display block, 7 is a terminal board, 8
is a locking spring, 9 is a release button, D1 to D5 are diodes, L
E D + and L E D 2 are light emitting diodes,
A is the switch body. ■... Rectifier flock Figure 3 Figure 11 Figure 12 Figure 11 (b) Figure 13 (b) Figure 14 (b) Figure 16 Figure 15 (b) Old figure

Claims (1)

[Claims] (1) A rectifier block in which diodes are connected in a bridge shape and diodes are connected between the midpoints of each side, a display block in which a light emitting diode is connected between the input and output terminals of this rectifier block, and an external electric wire. Terminal board to be connected,
The switch body is equipped with a locking spring that presses the wires on the terminal board and a release button that presses the locking spring and releases the wires from the terminal board, and can be detachably attached to the mounting frame on the outside of the switch body. A switch with an indicator light, characterized by being provided with a locking means.