JP4352889B2 - switch - Google Patents

Description

  The present invention relates to a switch having a light emitting element that emits light during power supply from a power supply to a load.

  2. Description of the Related Art Conventionally, there has been provided a switch that includes a switch mechanism unit that turns on and off power supply from a power supply to a load and has a light emitting element that emits light when power is supplied from the power supply to the load (see, for example, Patent Document 1).

  As this type of switch, for example, there is a switch having a circuit configuration shown in FIG. This switch X1 has a single-pole single-throw type contact configuration, and includes a switch mechanism SW1 for turning on / off power supply from an AC power supply AC such as a commercial power supply to a load Z such as an illumination load, and a primary winding n1. A current transformer CT inserted in a power supply path from the AC power supply AC to the load Z, a light emitting diode L1 as a light emitting element connected between both ends of the secondary winding n2 of the current transformer CT, and the light emitting diode L1 And a diode D1 connected in antiparallel.

  When the switch mechanism unit SW1 is closed and power is supplied from the AC power supply AC to the load Z, the light emitting diode L1 is turned on by supplying power to the light emitting diode L1 through the current transformer CT. That is, it can be confirmed by turning on the light emitting diode L1 that the power supply to the load Z is performed.

  In addition, a series circuit of a flow lamp L2 as an indicator lamp and a resistor R2 and a resistor R3 are connected in parallel between both ends of the switch mechanism unit SW1. When the switch mechanism unit SW1 is open, that is, when the AC power supply AC is not supplying power to the load Z, a slight current flows through the resistor R3, thereby causing a potential difference between both ends of the flow lamp L2, thereby causing the flow lamp L2 to flow. Lights up. For example, when the load Z is an illumination load, the position of the switch X1 can be known by turning on the flow lamp L2 even in the darkness when the light is turned off.

  Further, as shown in FIG. 22B, a three-way switch X2 including a switch mechanism unit SW2 having a single-pole switching type contact point configuration is also provided. That is, if the connection of the fixed contacts of the two three-way switches X2 is inserted into the power supply path from the power source AC to the load Z, the power supply to the load Z is performed by any of these two three-way switches X2. Can be turned on and off. In this case, the circuit of the flow lamp L2 and the resistors R2 and R3 is connected between the fixed contacts. That is, when power is not supplied to the load Z, the flow lamp L2 is turned on by the potential difference between the fixed contacts. This type of switch is used, for example, to turn on / off lighting arranged in the middle of the stairs above and below the stairs.

  An example of the structure of the conventional three-way switch X2 is shown in FIG. The three-way switch X2 includes a switch mechanism SW2, a display block B2 in which the light-emitting diode L1 and the flow lamp L2 are mounted on the wiring board 66, and a container housing the switch mechanism, the display block B2, and the current transformer CT. Is provided. The body includes a body 5b whose front surface is opened and a cover 5a whose rear surface is opened and closes the body 5b. The container has terminal plates 15, 18, and 20 to which the electric wires inserted from the four electric wire insertion openings 13a provided in the body 5b are locked by the lock springs 16 and 19, respectively. Stored.

  The switch mechanism SW2 includes a fixed contact 25b held on each of the terminal plates 18 and 20, a movable contact 29 that holds the movable contact 29, and can swing so that the movable contact 29 is separated from the fixed contact 25b. A support plate 15e is provided which is electrically connected to the switch 24 and serves as a fulcrum for the switch 24. The switch 24 swings each time a push button handle 32 provided on the front surface of the container is pressed, and a movable contact 29 and a fixed contact (not shown) of one terminal plate 18 and a state where the movable contact 29 and a fixed contact 25b of the other terminal plate 20 are in contact with each other. .

  As shown in FIG. 24, on the wiring board 66 of the display block B2, in addition to the light emitting diode L1 and the flow lamp L2, a diode D1, resistors R2 and R3, and a contact 67a that is in contact with the terminal plates 20 and 18, respectively. , 67b. These contacts are connected to both ends of the circuit of the flow lamp L2 and the resistors R2 and R3. The wiring board 66 is formed in a substantially T shape, and two recesses 66a are arranged side by side on the periphery, and two Siegel wires n21 described later connected to both ends of the secondary winding n2 of the current transformer CT are respectively recessed. 66a and soldered to a pad (not shown) formed in the vicinity of the recess 66a.

  As shown in FIG. 25, the current transformer CT includes, for example, a primary winding n1 and a secondary winding n2 made of enameled wire, and a ferrite core FC. The ferrite core FC includes the primary winding n1 and the secondary winding n2. The base F1 has a column part F1a around which the winding n2 is wound, and the cover F2 is coupled to the base F1 and closes the magnetic circuit.

Here, as shown in FIG. 26, the support plate 15e of the switch mechanism unit SW2 is placed on an inner frame 57 that partitions the space in which the current transformer CT is stored from the space in which the switch mechanism unit is stored. The middle frame block B1 and the middle frame 57 and the current transformer CT are assembled into the container. Both ends of the secondary winding n2 of the current transformer CT are connected to the wiring board 66 of the display block B2 via, for example, Siegel lines n21. In addition, the wire n11 drawn from one end of the primary winding n1 of the current transformer CT is soldered to the support plate 15e, and the wire n12 drawn from the other end is a terminal to which a wire inserted from outside the container is connected. Connected to the plate 15. A protective tube T made of an insulating material is attached to the electric wire n12 connected to the terminal plate 15 of the primary winding n1.
Japanese Patent Laid-Open No. 10-12079 (page 4-6, FIG. 1)

  However, since the electric wire n12 drawn from the primary winding n1 of the current transformer CT is flexible and cannot be positioned with respect to the position of the core FC of the current transformer CT, it is difficult to automate the soldering operation to the support plate 15e. Therefore, the manufacturing cost was high.

  This invention is made | formed in view of the said reason, The objective is to provide the switch which can reduce manufacturing cost.

The invention according to claim 1 is inserted into a power supply path from the power supply to the load, a display block having a switch mechanism section for turning on and off power supply from the power supply to the load, a light emitting element and a wiring board on which the light emitting element is mounted. A lighting block in which a lighting circuit for lighting a light emitting element by using a forward voltage drop of the diode when a power source is fed from a power source to a load is mounted on a circuit board; and a switch mechanism unit And a display frame and a lighting block, and a switch frame and an inner frame that divides the space in which the display block is stored and the space in which the lighting circuit is stored. The mechanical part is composed of a fixed contact and a conductor. The movable part is configured to hold the movable contact and swing the switch so that the movable contact is separated from the fixed contact. And a support plate serving as a fulcrum of the closing element contacts with conductive, the circuit board of the lighting blocks have pads are provided, characterized in that soldering the support plate to the pad.

According to this invention, when the primary winding of the current transformer is connected to the support plate because the position of the pad , which is a conductive path for connecting the support plate on the circuit board, is fixed with respect to the position of the circuit board. Compared with the automation of the operation, the manufacturing cost can be reduced. Further, since the light emitting element is turned on using the forward voltage drop of the diode, the light emitting element can be turned on with a smaller load current than when the secondary current of the current transformer is used.

A ninth aspect of the invention is characterized in that, in any one of the first to eighth aspects of the invention, the diode of the lighting circuit is a one-chip diode bridge connected in parallel to the light emitting element.

  According to the present invention, the number of parts can be reduced and the manufacturing cost can be reduced as compared with the case where a diode bridge circuit is formed using a plurality of diode chips. Further, it is possible to improve the heat dissipation by securing the space between the circuit components on the circuit board of the lighting block.

A tenth aspect of the invention is characterized in that in any of the first to ninth aspects of the invention, a capacitor connected in series to the light emitting element is provided.

  According to the present invention, since the current flowing through the light emitting element is stabilized by the capacitor, the brightness of the light emitting element can be improved. Alternatively, it is possible to reduce the amount of heat generation and power consumption of the lighting circuit by reducing the number of forward voltage drop diodes while ensuring the brightness of the light emitting element.

The invention of claim 11 is the display according to any one of claims 1 to 10 , which is lit by a potential difference between the fixed contact and the movable contact separated from the movable contact when power is not supplied from the power source to the load. And a resistor connected in parallel to the light emitting element and the diode.

  According to this invention, it is possible to prevent erroneous lighting of the light emitting element due to the current for lighting the display lamp by bypassing the current for lighting the display lamp to the resistor.

The invention according to claim 2 is inserted into a power supply path from the power source to the load, a display block having a switch mechanism section for turning on and off power supply from the power source to the load, a light emitting element and a wiring board on which the light emitting element is mounted A lighting block in which a lighting circuit for lighting a light emitting element by using a forward voltage drop of the diode when a power source is fed from a power source to a load is mounted on a circuit board; and a switch mechanism unit And a display frame and a lighting block, and a switch frame and an inner frame that divides the space in which the display block is stored and the space in which the lighting circuit is stored. The mechanical part is composed of a fixed contact and a conductor. The movable part is configured to hold the movable contact and swing the switch so that the movable contact is separated from the fixed contact. And a support plate serving as a fulcrum of the closing element contacts with conductive, the circuit board of the lighting block is made by insert molding the conductive plates in a synthetic resin molded article, characterized in that the supporting plate is soldered to the conductive plate And

According to this invention, when the position of the conductive plate, which is a conductive path for connecting the support plate in the circuit board, is fixed with respect to the position of the circuit board, the primary winding of the current transformer is connected to the support plate. Compared to the above, the automation of the work becomes easier, so that the manufacturing cost can be reduced. Further, since the light emitting element is turned on using the forward voltage drop of the diode, the light emitting element can be turned on with a smaller load current than when the secondary current of the current transformer is used. Furthermore, it is possible to radiate the circuit components via the conductive plate.

The invention of claim 4 is characterized in that, in the invention of claim 2 or 3 , the circuit board and the inner frame of the lighting block are integrally formed as a synthetic resin molded product.

  According to this invention, since the number of parts is reduced as compared with the case where the circuit board of the lighting block and the middle frame are formed separately, the manufacturing cost can be reduced.

The invention according to claim 3 is inserted into a power supply path from the power source to the load, a display block having a switch mechanism portion for turning on and off power supply from the power source to the load, a light emitting element and a wiring board on which the light emitting element is mounted. A lighting block in which a lighting circuit for lighting a light emitting element by using a forward voltage drop of the diode when a power source is fed from a power source to a load is mounted on a circuit board; and a switch mechanism unit And a display frame and a lighting block, and a switch frame and an inner frame that divides the space in which the display block is stored and the space in which the lighting circuit is stored. The mechanical part is composed of a fixed contact and a conductor. The movable part is configured to hold the movable contact and swing the switch so that the movable contact is separated from the fixed contact. The circuit board of the lighting block is formed by insert-molding a conductive plate into a synthetic resin molded product, and the support plate is a part of the conductive plate of the lighting block. It is characterized by being connected .

According to the present invention, the number of parts is reduced as compared with the case where the support plate and the conductive plate are formed separately, and the connection work between the support plate and the conductive path becomes unnecessary. The reliability of the electrical connection with can be improved, and the manufacturing cost can be reduced. Furthermore, since the light emitting element is lit using the forward voltage drop of the diode, the light emitting element can be lit with a smaller load current than when the secondary current of the current transformer is used.

According to a fifth aspect of the present invention, in any one of the second to fourth aspects of the present invention, the conductive plate of the circuit board of the lighting block has a connection portion soldered to the wiring board of the display block. .

  According to the present invention, it is not necessary to connect the circuit board of the lighting block and the electric wire as compared with the case where the circuit board of the lighting block and the wiring board of the display block are connected via the electric wire. The reliability of electrical connection with is improved. In addition, since the conductive plate is fixed to the circuit board, it is easy to automate the connection work between the connecting portion and the wiring board of the display block, and thus the manufacturing cost can be reduced.

The invention of claim 6 is characterized in that, in the invention of claim 5 , the circuit board of the lighting block is made of synthetic resin and has a reinforcing portion that surrounds the connecting portion and mechanically reinforces the connecting portion.

  According to the present invention, the connection portion is not easily damaged by mechanically reinforcing the connection portion.

According to a seventh aspect of the invention, in the sixth aspect of the invention, the conductive plate of the circuit board of the lighting block has a connecting portion that is located between the connecting portion and another portion and is not covered with the synthetic resin. To do.

  According to this invention, the direction of the connecting portion can be easily changed by bending the connecting portion.

The invention of claim 8 is characterized in that, in the invention of claim 7, a plurality of connection portions are provided, and the reinforcing portion surrounds the plurality of connection portions.

  According to the present invention, the plurality of connecting portions are bundled by the reinforcing portion, and during manufacturing, the plurality of connecting portions can be bent at the same time, so the number of man-hours can be reduced and the manufacturing cost can be reduced.

  According to the present invention, the position of the conductive path connecting the support plate in the circuit board is fixed with respect to the position of the circuit board, so that the work is performed as compared with the case where the primary winding of the current transformer is connected to the support board Therefore, the manufacturing cost can be reduced.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Embodiment 1)
In this embodiment, the technical idea of the present invention is applied to the three-way switch described in the conventional example as shown in FIG. That is, a diode bridge DB inserted in a power supply path from the AC power supply AC to the load Z and a diode D2 connected between the DC output terminals of the diode bridge DB are supplied to the load Z from the AC power supply AC. Sometimes, the light emitting diode L1 is lit by a forward voltage drop (for example, about 2.1 V in total) between the two diodes of the diode bridge DB and the diode D2. That is, the diode constituting the diode bridge DB and the diode D2 connected between the DC output terminals constitute a lighting circuit.

  Hereinafter, the structure of this embodiment will be described. In the present embodiment, elements such as the diode D2 constituting the lighting circuit are mounted as shown in FIG. 3, and the support board constituting the switch mechanism unit SW2 is mounted on the circuit board 81 formed of the printed wiring board constituting the lighting block. By directly mounting 15e as shown in FIG. 4, it is easy to automate the connection work between the lighting circuit and the support plate 15e, and thus the manufacturing cost can be reduced.

  More specifically, the lighting block, the display block B2 having the light emitting diode L1, and the switch mechanism part SW2 are provided with a push button handle 32 for operating the switch mechanism part SW2 as shown in FIG. It is stored in the body 5. The push button handle 32 and the container 5 are each formed in a rectangular shape when viewed from the front. As shown in FIG. 1, the container body 5 is formed by a front-open body 5b, which is a synthetic resin molded product, and a rear-open cover 5a coupled to the front side of the body 5b. That is, the assembly piece 3 is extended rearward from the rear edge of the both side walls in the short direction of the cover 5a (upper left-lower right in FIG. 1), and the assembly hole 4 provided in the assembly piece 3 is formed in the body 5b. The body 5b and the cover 5a are coupled by engaging with the assembly protrusions 6 formed on both side surfaces in the short direction. An inclined surface 6a is formed on the assembly protrusion 6 so that the protrusion dimension from the body 5b becomes smaller toward the cover 5a, and the assembly piece 3 can be applied to the assembly protrusion 6 only by applying a force to bring the cover 5a closer to the body 5b. It is designed to be easily combined.

  The dimensions of the container 5 in the short direction are formed such that up to three can be attached to a mounting frame used in the construction of an embedded wiring device called a large-angle continuous type (see JIS C8304). On the other hand, the longitudinal dimension of the container body 5 is substantially equal to the lateral dimension of the window hole, and the longitudinal side surface of the cover 5a forming the front part of the container body 5 surrounds the window hole of the mounting frame. A pair of mounting claws 11b that can be engaged with the instrument mounting holes provided in the region are provided in a projecting manner so that the body 5 is held by the mounting frame by engaging the mounting claws 11b with the instrument mounting holes. It is. In addition, a pair of shafts projecting diagonally forward to pivotally attach a piano handle (not shown) that is pushed to transmit the pressing force to the push button handle 32 at the front side end of the cover 5a of the body. 192 protrudes integrally. The front end portion of the shaft portion 192 is formed in a columnar shape along the short direction of the cover 5a.

  By the way, the internal space of the body 5b is partitioned into three chambers in the longitudinal direction, the partitions on both sides are terminal storage chambers 13 and 14 in which terminals are stored, and the central partition is formed deeper than the terminal storage chambers 13 and 14 and is switched. It becomes the central storage chamber 23 in which the mechanism unit and the lighting block are stored. The terminal storage chamber 13 stores terminals including a terminal plate 15, two locking springs 16 and a release button 17, and the terminal storage chamber 14 has two terminal plates 18, 20 and each terminal plate 18, 20. Two terminals comprising two lock springs 19 and a release button 21 provided for each are housed. In addition, a pair of wire insertion openings 13a are provided through the rear wall of the body 5b corresponding to the terminal storage chambers 13 and 14, and one release hole (in the vicinity of each pair of the wire insertion openings 13a). (Not shown) is provided.

  The lock springs 16 and 19 are bent at both ends of a conductive metal strip having elasticity, so that the lock pieces 16a and 19a and the contact pieces 16b and 19b are formed at both ends of the central pieces 16c and 19c. Are formed respectively. The locking pieces 16a and 19a are bent in a J shape, and are inclined so as to increase the distance from the central pieces 16c and 19c toward the tip from the connecting portion with the central pieces 16c and 19c. The contact pieces 16b and 19b are bent in an S shape and have elasticity in the thickness direction of the central pieces 16c and 19c.

  On the other hand, each of the terminal plates 15, 18, and 20 includes front pieces 15a, 18a, and 20a, and pressing pieces 15b, 18b, and 20b and contact pieces 15c that are located behind the front pieces 15a, 18a, and 20a and face each other. , 18c, 20c. The central pieces 16c and 19c of the locking springs 16 and 19 have a flat plate shape and abut against the contact pieces 15c, 18c and 20c of the terminal plates 15, 18 and 20, respectively, and the locking pieces 16a and 19a and the contact pieces 16b and 19b is made to oppose the pressing pieces 15b, 18b, and 20b, respectively. The positional relationship between the terminal plates 15, 18, 20 and the lock springs 16, 19 and the wire insertion port 13 a is such that the wires introduced from the wire insertion port 13 a to the container 5 are locked by the lock springs 16, 19. It is set to be inserted between the pieces 16a, 19a and the contact pieces 16b, 19b and the holding pieces 15b, 18b, 20b of the terminal plates 15, 18, 20 respectively. Therefore, when the electric wire is inserted into the container body 5, the electric wire is sandwiched between the locking pieces 16a, 19a and the contact pieces 16b, 19b and the holding pieces 15b, 18b, 20b of the terminal plates 15, 18, 20; The ends of the locking pieces 16a and 19a bite into the core of the electric wire to be removed, and the electric connection between the electric wire core and the terminal plates 15, 18, and 20 is achieved by the locking pieces 16a and 19a and the contact pieces 16b and 19b. Is made. A terminal of this type that can connect an electric wire by using the spring force of the lock springs 16 and 19 without using a terminal screw is called a quick connection terminal.

  Here, since the pair of lock springs 16 stored in the terminal storage chamber 13 are arranged corresponding to one terminal plate 15, the pair of electric wires connected to the terminal plate 15 are connected via the terminal plate 15. Are electrically connected to each other. That is, one of the two lock springs 16 corresponding to the terminal plate 15 accommodated in the terminal accommodating chamber 13 can be used as a terminal for the feed wiring.

  The release buttons 17 and 21 are formed using a thermosetting resin such as urea resin, and are stored in the terminal storage chambers 13 and 14 of the body 5b, respectively, with the rear portions facing the release holes. A part of the release buttons 17 and 21 can come into contact with the lock pieces 16a and 19a of the lock springs 16 and 19, and the release buttons 17 and 21 are pushed by the tip of a tool such as a flat-blade screwdriver through the release hole. Then, the locking pieces 16a, 19a are separated from the holding pieces 15b, 18b, 20b of the terminal plates 15, 18, 20 to weaken the holding force of the electric wires, and the electric wires can be pulled out in this state. Here, the release button 17 is disposed so as to straddle a pair of lock springs 16 corresponding to the terminal plate 15, and the release button 21 is a lock spring 19 corresponding to the terminal plate 18 and a lock spring corresponding to the terminal plate 20. 19 and so as to straddle. That is, each release button 21 can press the locking pieces 16a and 19a of the two locking springs 16 and 19 simultaneously.

  One terminal plate 18 accommodated in the terminal accommodating chamber 14 is integrally formed with a contact holding piece 18d inserted into the central accommodating chamber 23, and the tip of the contact retaining piece 18d is formed in the central accommodating chamber 23. A fixed contact 25a (see FIG. 6) is provided. Further, the other terminal plate 20 accommodated in the terminal accommodating chamber 14 is provided with an L-shaped contact holding piece 20d extending to a portion facing the contact holding piece 18d provided on the terminal plate 18, and the contact holding piece. A fixed contact 25b facing the fixed contact 25a provided on the terminal plate 18 is provided at a portion inserted into the central storage chamber 23 at 20d.

  The central storage chamber 23 stores an intermediate frame block B1 in which the circuit board 81, the intermediate frame 57, and the support plate 15e are coupled. The middle frame block B1 will be described in detail with reference to FIG. A connection hole 81a is formed through the front and back of the end portion of the circuit board 81. The rear surface of the middle frame 57 is overlaid on the non-mounting surface of the circuit board 81. Here, the middle frame 57 is provided with a gap 57 e that exposes the connection hole 81 a when it overlaps the circuit board 81. The support plate 15e is placed on the bottom surface of a recess 57f provided on the front surface of the middle frame 57 and opened to the side of the middle frame 57 (lower right in FIG. 4). The width dimension of the recess 57f in the upper right-lower left direction in FIG. 4 is formed to be approximately the same as the width dimension of the support plate 15e, and the support plate 15e is positioned with respect to the middle frame 57 by being housed in the recess 57f. .

  Further, the support plate 15e has a connection piece 15i that is bent at one end and protrudes backward. The connection piece 15i protrudes from the recess 57f and is inserted into the connection hole 81a through the gap 57e, and is provided at the periphery of the connection hole 81a. The support plate 15e is mechanically and electrically connected to the circuit board 81 by being soldered to a pad (not shown) as a conductive path. Further, since the intermediate frame 57 is sandwiched between the support plate 15e and the circuit board 81, the intermediate frame 57 is also mechanically coupled to the support plate 15e and the circuit board 81. Will be mechanically coupled. Here, the pad to which the support plate 15e is connected is connected to one AC input end of the diode bridge DB. The other AC input terminal of the diode bridge DB is connected to the terminal plate 15 via the lead wire S3. Here, the support plate 15e is electrically connected to the movable contact 29 by being brought into contact with a switch 24 described later, and the terminal plate 15 is electrically connected to the AC power source AC or the load Z via an electric wire. The diode bridge DB is inserted into the power supply path from the AC power supply AC to the load Z.

  Here, the terminal plate 15 has a connecting piece 15g bent in an L shape rearward from the front piece 15a, and the lead wire S3 passes through an insertion hole (not shown) penetrating the middle frame 57. And is inserted and soldered into a through-hole 15h formed through the connection piece 15g of the terminal plate 15. Since the lead wire S3 is protected by being inserted through the insertion hole provided in the middle frame 57, the number of parts is reduced compared to the case of using the protective tube T as in the conventional example, and the manufacturing cost can be reduced. it can.

  Further, the AC input terminal of the diode bridge DB of the circuit board 81 is also connected to a wiring board 66 of the display block B2, which will be described later, via lead wires S1 and S2 having insulating coatings. The lead wires S1 and S2 are led out to the front of the middle frame 57 through gaps 57a provided in the middle frame 57, respectively.

  By the way, the rear end edge of the opening / closing element 24 made of a flat conductive plate comes into contact with the support plate 15e placed on the middle frame 57. The opening / closing element 24 is disposed between the support base 57b provided on the inner frame 57 and the inner peripheral surface of the body 5b, and the front end side provided on the opposing surface of the support base 57b and the body 5b has a wide V-shaped position regulation. A pair of protrusions 28 protruding from both side edges of the opening / closing element 24 are inserted into the recesses 27 (the body 5b side is not shown). Therefore, the opening / closing element 24 can swing within the range of the position restricting recess 27 using the support plate 15e as a swing fulcrum. Further, the switch 24 is disposed between the contact holding pieces 18d and 20d, and the fixed contact 25a and the contact holding piece provided on the contact holding piece 18d as the switch 24 swings on both surfaces of the switch 24. Each of the movable contacts 29 is provided so as to be separated from the fixed contact 25b provided at 20d. In other words, when the switch 24 swings, the movable contact 29 selectively contacts one of the fixed contacts 25a and 25b, and the terminal plate 15 is electrically connected to the terminal plate 18; Is switched to the state of electrically connecting to the terminal board 20.

  The display block B2 has the same configuration as that of the conventional example except that a resistor R1 connected in series is added to the antiparallel circuit of the light emitting diode L1 and the diode D1. Here, the other ends of the lead wires S1 and S2 whose one ends are connected to the circuit board 81 of the lighting block are inserted into the recesses 66a provided on the peripheral edge of the wiring board 66, and the pads provided near the recesses 66a. Soldered. Here, a circuit of the light emitting diode L1, the diode D1, and the resistor R1 is connected between the lead wires S1 and S2.

  The display block B2 described above is housed in a housing recess (not shown) formed at one end in the longitudinal direction of the cover 5a and having a rear opening. If the cover 5a is coupled to the body 5b so that the display block B2 is housed in the housing recess, the tip of one contact 67a (see FIG. 24) elastically contacts the front piece 18a of the terminal board 18, and the other The tip of the contact 67b (see FIG. 24) elastically contacts the front piece 20a of the terminal board 20. That is, a circuit in which the resistor R3 is connected in parallel to the series circuit of the resistor R2 and the flow lamp L2 is inserted between the terminal plates 15 and 18.

  In the present embodiment, as described above, the switch mechanism unit SW2 that selectively contacts the movable contact 29 with the two fixed contacts 25a and 25b is configured, and the diode bridge DB is inserted between the movable contact 29 and the terminal plate 15. Then, a circuit including the flow lamp L2 is inserted between the two fixed contacts 25a and 25b. Therefore, for example, if the power supply from the AC power supply AC to the load Z is turned on and off according to the state of the switch mechanism SW2 by the circuit configuration shown in FIG. If a voltage is applied between the contacts 25a and 25b to turn on the flow lamp L2, and an illumination load is used as the load Z, the flow lamp L2 is turned on when the illumination load is turned off, so that the switch can be switched even in the dark. The position of 1 can be easily confirmed. Further, since current flows through the diode bridge DB when power is supplied from the AC power supply AC to the load Z, the light emitting diode L1 is turned on to indicate that power is supplied to the load Z.

  A through hole window 40 communicating with the storage recess 55 is formed on the front wall of the cover 5a corresponding to the storage recess in which the display block B2 is stored, and the through hole window 40 has translucency. A lamp cover 41 is attached. Therefore, the lighting / extinguishing state of the light emitting diode L1 and the flow lamp L2 can be visually recognized through the lamp cover 41.

  Next, the structure of the switch mechanism unit SW2 will be described. In addition to the support plate 15e, the fixed contacts 25a and 25b, the movable contact 29, and the switch 24, the switch mechanism SW2 includes a reversing spring 30, a reversing handle 31, and the like. It has a push button handle 32, a slide cam 33, a return spring 37, and a support plate 15e. The reversing spring 30 is a coil spring, and a spring seat piece 24 a protruding from the front edge of the switch 24 is inserted into the rear end of the reversing spring 30, and the front end is a cylindrical portion having a rear opening provided on the reversing handle 31. It is stored in 31a. The front end of the reversing handle 31 is exposed to the front side of the cover 5a through a through hole 52 provided in the bottom wall of the recess 51 provided on the front surface of the cover 5a. Triangular fulcrum protrusions 31b having a tapered front end project from both side surfaces of the intermediate portion of the reversing handle 31, and are formed on both side edges of the through hole 52 and are supported at the bearing portions 50 opened rearward. The reversing handle 31 is pivotably attached to the cover 5a by pivotally supporting 31b. That is, by inserting the front end portion of the reversing handle 31 into the through hole 52 of the cover 5a from the rear and inserting the fulcrum protrusion 31b into the bearing portion 50, the reversing handle 31 can swing with respect to the cover 5a. As described above, the reversing handle 31 is connected to the switch 24 via the reversing spring 30, and when the reversing handle 31 swings, the reversing spring 30 passes through the position where it is compressed most in the middle of the swinging range. Before and after this position, the direction of the spring force acting on the switch 24 from the reversing spring 30 is reversed, and the switch 24 rapidly swings due to the spring force of the reversing spring 30.

  Further, a pair of engaging protrusions 34 projecting forward and engaging the slide cam 33 are provided on both side portions of the reversing handle 31 that are exposed to the front side of the cover 5 a through the through hole 52. The slide cam 33 is configured to slide along the rear surface of the push button handle 32 in a plane including the swinging direction of the reversing handle 31 according to the positional relationship of the reversing handle 31 when the push button handle 32 provided on the cover 5a is pushed. Has been. The configuration of the slide cam 33 will be described later.

  The push button handle 32 includes guide protrusions 36 projecting from the rear end portions of both outer side surfaces in the longitudinal direction (upper right-lower left direction in FIG. 1), and extends along the front-rear direction on the rear portions of both inner peripheral surfaces of the recess 51 of the cover 5a. By inserting the guide protrusion 36 into the guide groove 35 formed in this manner, the guide protrusion 36 is movable in the front-rear direction and is prevented from being pulled forward.

  A protrusion (not shown) protrudes from the rear surface of the push button handle 32, and the return spring 37 is inserted into the hole 37d formed in the flat piece 37b of the return spring 37 made of a leaf spring. It is attached to the rear surface. The return spring 37 is formed by integrally extending two return spring pieces 37 a that are expanded rearward from the flat piece 37 b, and the tip of the spring piece 37 a of the return spring 37 is in elastic contact with the bottom surface of the recess 51. The push button handle 32 is biased forward.

  The slide cam 33 is formed in a square shape with an elastic thermoplastic resin such as polyacetal, and a hooking cam body 38 corresponding to the hooking protrusion 34 of the reversing handle 31 protrudes from the rear surface of the opposite side portion. In addition, a pair of spring pieces 33a are integrally projected at the center of another side portion so as to form a letter C shape. As shown in FIG. 6, the protrusion 32a protruding from the rear surface of the push button handle 32 is inserted between the spring pieces 33a, so that the slide cam 33 is slidably mounted on the rear surface of the push button handle 32. A restoring force is applied to the slide cam 33 by the elasticity of the spring piece 33a.

  Hereinafter, the operation of this embodiment will be briefly described with reference to FIG. Hereinafter, the horizontal direction and the rotation direction will be described with reference to FIG. FIG. 6 shows a state where the movable contact 29 is in contact with the left fixed contact 25a, and the reversing handle 31 is tilted to the right. At this time, the slide cam 33 is located at the center of the moving range by the spring piece 33a. From this state, when a pressing force is applied to the push button handle 32 by operating a piano handle (not shown) provided on the front surface of the container 5, the push button handle 32 is pushed into the container 5 against the return spring 37, The slide cam 33 moves backward (downward in FIG. 6B) together with the push button handle 32. At this time, the engaging cam body 38 on the left side of the slide cam 33 abuts on the engaging protrusion 34 on the left side of the reversing handle 31 and pushes the left end portion of the reversing handle 31, so the reversing handle 31 rotates counterclockwise around the front end of the fulcrum protrusion 31b. Rotate to. The engagement cam body 38 on the left side of the slide cam 33 is located on the left side of the engagement protrusion 34 on the left side of the reversing handle 31, and as the reversing handle 31 rotates, the slide cam 33 is pushed leftward to slide. The cam 33 slides to the left. In this way, the reversing handle 31 is tilted to the left side, the reversing spring 30 is reversed, the switch 24 is reversed, and the movable contact 29 is separated from the fixed contact 25a and is in contact with the fixed contact 25b. Thereafter, when the pressing force applied to the push button handle 32 is released, the push button handle 32 is pushed back by the spring force of the return spring 37 to return to the original position. At the same time, the slide cam 33 is also slid by the spring force of the spring piece 33a and returned to the center position.

  Thus, when the pressing force is applied again to the push button handle 32 while the movable contact 29 is in contact with the fixed contact 25b, the reversing handle 31 can be rotated in the same manner as described above. However, when the movable contact 29 is in contact with the right fixed contact 25b, the right engaging protrusion 34 of the reversing handle 31 abuts on the right engaging cam body 38 of the slide cam 33, so that the reversing handle 31 turns clockwise. The movable contact 29 is pulled away from the right fixed contact 25b via the reversing spring 30 and is brought into contact with the left fixed contact 25a. If the pressing force is released from the push button handle 32 after the switch mechanism section SW2 is reversed in this way, the state returns to the state shown in FIG. In short, every time the push button handle 32 receives a pressing force, the switch mechanism SW2 is switched.

  According to the above configuration, since the position of the pad as the conductive path to which the support plate 15e is soldered is determined with respect to the circuit board 81, the electric wire n11 that is flexible and has no fixed position as in the conventional example is used for the support plate 15e. Compared with the case of connecting to the light source, it becomes easier to automate the connection work between the lighting block and the support plate 15e, so that the manufacturing cost can be reduced. Further, since the light emitting diode L1 is turned on by the diode, the light emitting diode L1 can be turned on with a smaller negative overcurrent than in the case of using the current transformer CT having a relatively large power loss as in the conventional example. . Further, when the current transformer CT is used for lighting the light emitting diode L1, the brightness of the light emitting diode L1 may be reduced when the body 5 is shocked by dropping or the like and the core is missing. Then this is not the case.

  If the diode bridge DB is made into one chip as shown in FIG. 7, the number of parts is reduced and the manufacturing cost is reduced, and the heat dissipation is improved by securing the distance between the circuit parts on the circuit board 81. can do.

  The present invention can be applied not only to the three-way switch as described above but also to a so-called one-sided switch of single pole single throw as shown in FIG. In this case, the parallel circuit of the flow lamp L2 and the series circuit of the resistor R2 and the resistor R3 is connected in parallel to the switch mechanism unit SW1.

  9 and 10, a capacitor C1 as a capacitor may be connected in series with the light emitting diode L1. According to this configuration, since the current flowing through the light emitting diode L1 is stabilized, the brightness of the light emitting diode L1 can be improved. Alternatively, the forward voltage drop of the diode can be reduced while ensuring the brightness of the light emitting diode L1, and the amount of heat generated by the capacitor C1 is smaller than the amount of heat generated by the diode. By reducing the number, the amount of heat generated and the power consumption of the lighting circuit can be reduced. For example, in the case of this embodiment, the diode D2 connected between the DC output terminals of the diode bridge DB can be omitted. Further, the brightness of the light emitting diode L1 can be adjusted by selecting the capacitance of the capacitor C1.

  Furthermore, when the light emitting diode L1 is erroneously turned on by a current flowing through a circuit including the flow lamp L2, as shown in FIG. 11, a resistor R4 is connected in parallel to the diode bridge DB, and the current is bypassed to the resistor R4. Thus, erroneous lighting of the light emitting diode L1 can be prevented. For example, when the current flowing through the circuit including the flow lamp L2 is about 0.5 mA and the load current is larger than 5 mA, the resistor R4 is turned on so that the light-emitting diode L1 is turned on when the current flowing through the switch 1 is 5 mA or more. If the resistance value is set, erroneous lighting of the light emitting diode L1 can be surely prevented. Here, if the position where the resistor R4 is mounted is the end of the circuit board 81 as shown in FIG. 12, the influence of the heat of the resistor R4 on other circuit components can be suppressed.

(Embodiment 2)
Since the basic configuration of the present embodiment is the same as that of the first embodiment, common portions are denoted by the same reference numerals, illustration and description thereof are omitted, and only different portions will be described.

  As shown in FIGS. 13 and 14, the present embodiment is characterized in that the circuit board 81 is made of a synthetic resin molded product in which a conductive plate 82 made of, for example, a copper plate is insert-molded.

  More specifically, the diode bridge DB, the capacitor C1, and the resistor R4 constituting the lighting circuit are soldered to a portion where the conductive plate 82 is exposed as shown in FIG. 13A, as shown in FIG. Attach. Further, the lead wires S1 to S3 and the connecting claws 15i of the support plate 15e are inserted and soldered through through holes 82a to 82d that are formed in portions where both surfaces of the conductive plate 82 are exposed. Other configurations are the same as those of the first embodiment.

  According to this configuration, it is possible to dissipate heat through the conductive plate 82 of circuit components such as the diode bridge DB constituting the lighting circuit. In general, a conductor such as a metal constituting the conductive plate 82 has higher thermal conductivity than a synthetic resin constituting the printed wiring board, so that heat dissipation is improved as compared with the case where a printed wiring board is used as the circuit board 81.

  As shown in FIG. 15, the middle frame 57 and the circuit board 81 may be integrally formed as a synthetic resin molded product. According to this configuration, the manufacturing cost can be further reduced by reducing the number of parts.

  Further, as shown in FIG. 16, the support plate 15 e may be connected to the conductive plate 82 inserted in the circuit board 81, that is, the support plate 15 e may be formed as a part of the conductive plate 82. According to this configuration, the manufacturing cost can be further reduced by further reducing the number of parts. Moreover, the reliability of the electrical connection between the movable contact 29 and the lighting circuit is improved by reducing the number of soldered portions.

(Embodiment 3)
Since the basic configuration of the present embodiment is the same as that of the second embodiment, common portions are denoted by the same reference numerals, illustration and description thereof are omitted, and only different portions will be described.

  In the present embodiment, as shown in FIGS. 17 and 18, the electrical connection between the circuit board 81 of the lighting block and the wiring board 66 of the display block B2, and the electrical connection between the circuit board 81 of the lighting block and the terminal board 15 are performed. Instead of using the lead wires S1 to S3, connection portions 82e and 82g formed integrally with the conductive plate 82 are used for the connection. Of the connecting portions 82e and 82g, the two connecting portions 82e connected to the wiring board 66 of the display block B2 are mechanically reinforced by the reinforcing portion 83 made of synthetic resin and mechanically coupled to each other. ing. A portion of the circuit board 81 that is formed in a rectangular plate shape and on which the lighting circuit is mounted is hereinafter referred to as a main body portion 84. The conductive plate 82 is provided with a connecting portion 82f that is not covered with the synthetic resin between a portion of the connecting portion 82e covered by the reinforcing portion 83 and the main body portion 84, and the connecting portion 82e is bent by bending the connecting portion 82f. The reinforcing portion 83 is raised to the front of the main body portion 84. Further, the connecting portion 82g connected to the terminal plate 15 is raised to the front of the main body portion 84 by bending the base portion (the end portion on the side close to the main body portion 84).

  Further, the conductive plate 82 is provided with a connection pin 82h protruding to the side of the main body 84, and the support plate 15e is provided with a connection piece 15j that is bent rearward and protrudes rearward from the side of the recess 57f of the middle frame 57. In addition, the connection hole 15k is provided through the connection piece 15j, and the conductive plate 82 and the support plate 15e are electrically and mechanically connected by inserting the connection pin 82h into the connection hole 15k and soldering. ing.

  Further, as shown in FIG. 18A, the circuit board 81 is provided with three positioning holes 81b in a triangular apex arrangement when viewed from the front. A positioning projection (not shown) is provided on the rear surface of the middle frame 57 at a position corresponding to the positioning hole 81b. The positioning frame is inserted into the positioning hole 81b so that the middle frame 57 is located with respect to the circuit board 81. Positioned.

  At the time of manufacturing, the lead frame FR is insert-molded into a synthetic resin as shown in FIG. 17A to form the circuit board 81, and then the diode bridge DB and the capacitor C1 are mounted as shown in FIG. As shown in FIG. 17C, the circuit board 81 is cut off and the base portion of the connecting portion 82g and the connecting portion 82f are bent. At this time, since the two connecting portions 82e are mechanically connected to each other by the reinforcing portion 83, for example, only by applying a force to the reinforcing portion 83, each connecting portion 82f corresponding to the two connecting portions 82e. Can be bent at the same time. Therefore, compared with the case where the connecting portions 82f are individually bent, the number of steps can be reduced and the manufacturing cost can be reduced.

  Here, in the stage before bending the connection portions 82e and 82g, each connection portion 82e connected to the display block B2 extends in a direction away from the main body portion 84, whereas it is connected to the terminal plate 15. The connecting portion 82 g extends along the periphery of the main body portion 84. With this configuration, the manufacturing cost can be reduced by reducing the area of the lead frame FR required for each circuit board 81 as compared with the case where the connecting portion 82g is extended in the direction away from the main body portion 84.

  According to the above configuration, the number of soldering points is reduced as compared to the first and second embodiments, so that the reliability of electrical connection between the circuit board 81 of the lighting block and the wiring board 66 of the display block B2 and the lighting block are reduced. The reliability of the electrical connection between the circuit board 81 and the terminal board 15 is improved. Further, since the positions of the connecting portions 82e and 82g are more stable than the lead wires S1 to S3, the connection work between the circuit board 81 of the lighting block and the wiring board 66 of the display block B2, and the circuit board 81 and the terminal board 15 of the lighting block. It is easy to automate the connection work with the device, and therefore the manufacturing cost can be further reduced. Further, since the connecting portion 82e is mechanically reinforced by the reinforcing portion 83, the connecting portion 82e is hardly damaged.

  Moreover, since it has the connection part 82f which is located between the connection part 82e and the other site | part of the electrically-conductive board 82, and is not covered with a synthetic resin, as shown in FIG. However, the direction of the connecting portion 82e can be easily changed by bending the connecting portion 82f after insert molding.

  In addition, as shown in FIG. 19, you may integrally form the inner frame 57 and the circuit board 81 as a synthetic resin molded product. Here, in the example of FIG. 19, as in the second embodiment, the support plate 15e and the circuit board 81 are connected by inserting the connection piece 15i into the connection hole 82d and soldering. According to this configuration, the manufacturing cost can be further reduced by reducing the number of parts.

  Further, as shown in FIG. 20, the support plate 15 e may be formed as a part of the conductive plate 82. For example, the support plate 15e is formed by bending the conductive plate 82 forward, and an insertion hole 57c for inserting the support plate 15e to the upper side of the middle frame 57 is formed in the middle frame as shown in FIG. To be installed. In the example shown in FIG. 20, the connecting portion 82 g connected to the terminal plate 15 passes through a through hole 57 d provided in the middle frame 57. According to this configuration, the manufacturing cost can be further reduced by reducing the number of parts. Moreover, the reliability of the electrical connection between the movable contact 29 and the lighting circuit is improved by reducing the number of soldered portions.

  Alternatively, as shown in FIG. 21, the middle frame 57 and the circuit board 81 may be integrally formed as a synthetic resin molded product, and the support plate 15 e may be connected as a part of the conductive plate 82. According to this configuration, the manufacturing cost can be further reduced by further reducing the number of parts.

It is a disassembled perspective view which shows Embodiment 1 of this invention. It is a circuit diagram which shows the same as the above. It is a perspective view which shows the lighting block same as the above. It is a disassembled perspective view which shows a middle frame block same as the above. It is a perspective view which shows the same as the above. It is operation | movement explanatory drawing same as the above, (a) shows the state which looked at the pushbutton handle and the slide cam from back, (b) is sectional drawing of the principal part. It is a perspective view which shows the lighting block in another form same as the above. It is a circuit diagram which shows another form same as the above. It is a circuit diagram which shows another form same as the above, (a) (b) shows a different contact structure, respectively. It is a perspective view which shows a lighting block same as the above, (a) (b) shows another form, respectively. It is a circuit diagram which shows another form same as the above, (a) (b) shows a different contact structure, respectively. It is a perspective view which shows a lighting block same as the above, (a)-(d) shows another form, respectively. It is a perspective view which shows the circuit board of the lighting block in Embodiment 2 of this invention, (a) shows only a circuit board, (b) shows the state which mounted the lighting circuit and connected the lead wire. It is a figure which shows a middle frame block same as the above, (a) is a disassembled perspective view, (b) is a perspective view. It is a perspective view which shows the circuit board of the lighting block in another form same as the above, (a) shows only a circuit board, (b) shows the state which mounted the lighting circuit and connected the lead wire, (c ) Shows a state where the support plate is connected. It is a perspective view which shows the inner frame block with another form same as the above. It is explanatory drawing which shows the process in which the lighting block in Embodiment 3 of this invention is formed, (a) shows the state which formed the circuit board, (b) shows the state which mounted the lighting circuit, (c) Shows a state where the circuit board is cut off and the connecting portion is bent. It is a figure which shows a middle frame block same as the above, (a) is a disassembled perspective view, (b) is a perspective view. It is explanatory drawing which shows the process of forming the inner frame block by another form same as the above, (a) shows only the circuit board which has not bent the connection part, (b) shows the state where the lighting circuit was mounted, (C) shows the state which bent the connection part, (d) shows the state which connected the support plate. It is a figure which shows the principal part of another form same as the above, (a) is a front view which shows a middle frame, (b) is a front view which shows a middle frame block, (c) shows a middle frame block It is a disassembled perspective view, (d) is a perspective view which shows an inner frame block. It is a perspective view which shows the lighting block in another form same as the above, (a) shows the state before bending a connection part, (b) shows the state after bending a connection part. It is a circuit diagram which shows a prior art example, (a) (b) shows another contact structure, respectively. It is a disassembled perspective view which shows the same as the above. It is a disassembled perspective view which shows a display block same as the above. It is a disassembled perspective view which shows a current transformer same as the above. It is a figure which shows a middle frame block same as the above, (a) An exploded perspective view, (b) is a front view.

Explanation of symbols

5 Body 15e Support plate 24 Switch 25a, 25b Fixed contact 29 Movable contact 57 Middle frame 66 Wiring board 81 Circuit board 82 Conductive plate 82e, 82g Connection part 82f Connection part 83 Reinforcement part B1 Middle frame block B2 Display block C1 Capacitor D2 Diode DB Diode bridge L1 Light emitting diode L2 Flow lamp R4 Resistance

Claims (11)

A display block having a switch mechanism for turning on and off the power supply from the power supply to the load, a light emitting element and a wiring board on which the light emitting element is mounted, and one or more diodes inserted in the power supply path from the power supply to the load. A lighting block in which a lighting circuit for lighting a light emitting element using a forward voltage drop of a diode when power is supplied from a power source to a load is mounted on a circuit board, a switch mechanism section, a display block, and a lighting block And a middle frame that partitions the space between the switch mechanism unit and the display block and the space in which the lighting circuit is stored.
The switch mechanism unit is composed of a fixed contact and a conductor that holds the movable contact and swings so that the movable contact can be separated from the fixed contact. A support plate as a fulcrum,
A switch , wherein a circuit board of a lighting block is provided with a pad, and a support plate is soldered to the pad . A display block having a switch mechanism for turning on and off the power supply from the power supply to the load, a light emitting element and a wiring board on which the light emitting element is mounted, and one or more diodes inserted in the power supply path from the power supply to the load. A lighting block in which a lighting circuit for lighting a light emitting element using a forward voltage drop of a diode when power is supplied from a power source to a load is mounted on a circuit board, a switch mechanism section, a display block, and a lighting block And a middle frame that partitions the space between the switch mechanism unit and the display block and the space in which the lighting circuit is stored.
The switch mechanism unit is composed of a fixed contact and a conductor that holds the movable contact and swings so that the movable contact can be separated from the fixed contact. A support plate as a fulcrum,
Circuit board of the lighting block is made by insert molding the conductive plates in a synthetic resin molded product, wherein the to Luz switch that the support plate was soldered to the conductive plate. A display block having a switch mechanism for turning on and off the power supply from the power supply to the load, a light emitting element and a wiring board on which the light emitting element is mounted, and one or more diodes inserted in the power supply path from the power supply to the load. A lighting block in which a lighting circuit for lighting a light emitting element using a forward voltage drop of a diode when power is supplied from a power source to a load is mounted on a circuit board, a switch mechanism section, a display block, and a lighting block And a middle frame that partitions the space between the switch mechanism unit and the display block and the space in which the lighting circuit is stored.
The switch mechanism is composed of a fixed contact and a conductor that holds the movable contact and swings so that the movable contact can be separated from the fixed contact. A support plate as a fulcrum,
The circuit board of the lighting block is made by insert molding a conductive plate into a synthetic resin molded product.
Support plate features and to Luz switch that is formed by connecting a portion of the conductive plate of the lighting block. 4. The switch according to claim 2 , wherein the circuit board and the inner frame of the lighting block are integrally formed as a synthetic resin molded product . The switch according to any one of claims 2 to 4, wherein the conductive plate of the circuit board of the lighting block has a connection portion soldered to the wiring board of the display block. 6. The switch according to claim 5, wherein the circuit board of the lighting block is made of synthetic resin and has a reinforcing portion that surrounds the connecting portion and mechanically reinforces the connecting portion . Conductive plate of the circuit board of the lighting blocks, switches 請 Motomeko 6 wherein you further comprising a connecting portion which is not covered by the position and the synthetic resin between the connection portion and the other portions. The switch according to claim 7 , wherein the switch has a plurality of connecting portions, and the reinforcing portion surrounds the plurality of connecting portions . Diode lighting circuit switch according to any one of claims 1 to 8, characterized in that a one-chip of the diode bridge connected in parallel to the light emitting element. Switch according to any one of claims 1 to 9, characterized in that it comprises a capacitor connected in series to the light emitting element. It comprises an indicator lamp that is turned on by a potential difference between a fixed contact and a movable contact that are separated from the movable contact when power is not supplied from the power source to the load, and a resistor that is connected in parallel to the light emitting element and the diode. switch according to any one of claims 1 to 10 and.

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