JP5256962B2 - Recessed wiring device with indicator light - Google Patents

Description

  The present invention relates to an embedded wiring apparatus having an indicator lamp, and relates to an improvement in a support structure of the indicator lamp unit.

  An embedded switch with an indicator lamp is known (for example, see Patent Document 1). In the embedded switch with an indicator lamp described in Patent Document 1, contacts 67a, 67b, 71 for contacting terminal fittings arranged inside the switch body 1 extend from the simultaneous molding block 66 to the side. It consists of a plate spring. The contacts 67a, 67b, 71 have a lead frame structure and are configured to be separated from the lead frame F after being integrally formed with the simultaneous molding block 66, respectively.

JP 2003-007170 A

  A known embedded switch with an indicator lamp comprises a plate-like spring that contacts the terminal metal fittings 67a, 67b, 71 extending sideways from the simultaneous molding block 66. It is relatively difficult to secure the distance. For this reason, the display block B6 becomes large.

  On the other hand, it is needless to say that the embedded wiring device is provided with an indicator lamp, and the convenience of the wiring device is enhanced. For this reason, there is a need for various embedded wiring devices such as an off-time lighting type single-cut switch, an off-time lighting type three-way switch, an on-time lighting type single-cut switch, an on-time lighting type three-way switch, and an indicator lamp.

  However, designing and manufacturing an indicator lamp unit suitable for each of various embedded wiring devices has a problem of increasing costs.

  Therefore, if an embedded wiring apparatus having an indicator lamp without increasing the cost is installed by installing a universal multi-product compatible indicator lamp unit, it cannot be realized by a known technique.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an embedded wiring apparatus having an indicator lamp in which the indicator lamp unit is highly reliable and easy to assemble.

An embedded wiring instrument provided with an indicator lamp according to the present invention includes an insulating body having an opening on an upper surface, a case having an insulating cover for covering the opening of the body, and a frame portion and an interior of the body. A plurality of terminal fittings assembled in a drop structure at positions separated from each other, and an indicator lamp unit that is sandwiched between the opening edge of the body and the cover and disposed in the case; The contact portion and the indicator lamp are integrated, and the current-carrying portion forms a land constituting a required display circuit, and is formed to project from the left and right sides of each side edge to the left and right, and the body has a locking piece which is sandwiched between the opening edge and cover, the contact is a coil spring Tona wound helically to the outline forms a substantially inverted conical , Substantially inverted conical tip is mounted on the lower surface of the conductive portion is connected to the display circuit pressed against the upper surface of at least a pair of frame portions of the terminal fitting disposed in the body to a power source, indicator Is mounted on the upper surface of the energizing portion and connected to the display circuit.

  The present invention allows the following aspects.

  The case is embedded, and has a standardized size and embedded mounting structure. That is, it is configured to be attached to a standardized attachment frame, and can be embedded in an embedded wiring box or a wall board via the attachment frame.

  The case has a substantially rectangular parallelepiped shape and includes a body and a cover. The body is configured such that an upper surface thereof is open and wiring device components including terminal fittings can be accommodated therein. Further, a wiring insertion hole and an unlocking driver insertion hole for connecting indoor wiring such as an F cable are formed on the bottom surface of the body.

Further, as a preferred aspect of the present invention, the body is formed with support steps for supporting the locking pieces of the current-carrying portion of the display unit on both sides of the opening edge in the longitudinal direction. The support step portion is formed in the same plane as the opening surface by forming a pair of protrusions spaced upward in the longitudinal direction of the opening edge by a length capable of receiving the width dimension of the locking piece.

  On the other hand, the cover is a means for closing the opening of the body, guides the light emitted from the indicator lamp disposed inside the case to the outside, and locks the indicator lamp unit fitted to the support step portion of the body. The pressing part which presses down and gives a required contact pressure to the contact is formed. In the case of a wiring device having an operation unit such as a handle such as a switch, the operation unit is exposed to the outside of the cover.

A plurality of terminal fittings are incorporated in a drop structure at positions separated from each other inside the body. Each of the plurality of terminal fittings includes a frame portion. The frame portion is disposed such that the upper surface portion thereof is substantially parallel to the opening surface of the body. Then, the contact of the indicator unit to be described later is connected to the power supply in pressure contact with the above upper surface portion, the locking pieces and the unlocking operation member for pressing the core wire of the interior wiring therein, their predetermined functional relationship Store so that it is maintained.

The indicator lamp unit is integrated with at least an energizing section , a contact and an indicator lamp.

  The energization unit may be a wiring board such as a printed board, for example, or may be a base (made of resin) having an insulating board assembled with a metal conductive line. A required display circuit is formed, and two locking pieces are formed to protrude from the left and right from positions separated along the longitudinal direction of the body on both side edges. These locking pieces are disposed at predetermined positions in the case by being sandwiched between the body and the cover while being locked at predetermined positions on the opening edge of the body.

  In addition, the display circuit of the energization unit can connect a land to be connected to the contact and current limiting means as required. For example, a resistor can be used as the current limiting means.

Furthermore, the energization part is formed to a length that covers almost the entire length of the opening of the body. Then, even when a plurality of terminal fittings are arranged on both ends in the longitudinal direction of the body, a contact consisting of a coil spring having a substantially inverted conical outline is applied to the terminal fitting with sufficient contact pressure. Can be contacted. In addition, an effective display can be performed by disposing the indicator lamp at a substantially central portion in the longitudinal direction and leading the emitted light to the outside via an operation unit such as an operation handle.

The contact consists of a coil spring wound in a spiral whose contour is substantially inverted cone as described above, and a base portion having a conical bottom surface is mounted on the lower surface of the energizing portion. In addition, the display circuit is connected to the power source by pressing the tip of the conical apex to the upper surface of at least one pair of frame portions of the terminal fitting disposed in the body.

  The indicator lamp is mounted on the upper surface of the energization unit and connected to the display circuit. In the present invention, the type of indicator lamp is not particularly limited. For example, various light emitters such as a glow discharge lamp, a light emitting diode, and an electric field light emitter can be used.

  In the present invention, the function of the embedded wiring apparatus provided with the indicator lamp is not particularly limited. For example, it can be applied to various embedded wiring devices such as a one-way switch that lights when off, a three-way switch and a four-way switch, a three-way switch that lights when on, and a voltage detection type pilot lamp. In addition, although the shape of the wiring board can be made common, the display circuit can be manufactured according to multiple types of specifications because the terminal fittings to be connected differ depending on the function and display mode of the embedded wiring device. it can. In the case of a switch, a display window can be formed on the switch handle to emit light emitted from the indicator lamp to the outside. However, it may be a fixed display window if desired.

According to the present invention, the indicator lamp unit is sandwiched between the opening edge of the body and the cover, and the engaging piece of the energizing portion of the indicator lamp unit is sandwiched between the opening edge of the body and the cover. is disposed, it is possible to have reliable indicator lights units, yet provides a buried type wiring devices with easy indicator assembly.

In order tip of Ru coil spring Tona contactor contacts has no contour substantially inverted conical pressed against the upper surface of the frame portion of the terminal fitting the indicator unit is configured to contact with the terminal fittings, Since the contact pressure can be increased and the contact is compact, it is easy to secure the insulation distance in the case, so that the insulation safety is enhanced . Further, since the take increased free length of resiliently biased, with the contact is less likely to permanently deform, since regulation of the rotational position of the contacts during mounting is eliminated, to provide a buried type wiring device with a mounting for easy indicator be able to.

  Furthermore, if the wiring board of the indicator lamp unit is configured so as to cover the opening surface of the body over almost the entire length, even if a plurality of terminal fittings are provided on both ends in the longitudinal direction of the body, the contour is almost inverted. A contact made of a coil spring with a conical shape can be brought into contact with the terminal fitting with sufficient contact pressure to improve contact reliability, and an indicator lamp is arranged at the substantially central portion in the longitudinal direction to control the light emission. Effective display can be performed by deriving to the outside via the operation unit.

  Furthermore, the locking pieces spaced apart in the longitudinal direction of the body from the both side edges of the wiring board of the indicator lamp unit are formed to protrude left and right, and the support step portion is formed by the protrusion protruding upward on the opening edge of the body. If the indicator lamp unit is supported at a predetermined position in the case by engaging the locking piece, the assembly of the indicator lamp unit is easy and the contact between the contact and the terminal fitting is reliable and reliable. Increases nature.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  1 to 4 show an off-time lighting type three-way switch as a first mode for carrying out an embedded wiring apparatus having an indicator lamp of the present invention. FIG. 1 shows a six-side view of an embedded wiring device in an assembled state, where (a) is a front view, (b) is a plan view, (c) is a bottom view, (d) is a right side view, (e ) Is a plan view with the cover removed, and (f) is a plan view with the indicator light unit and cover removed. FIG. 2 is a cross-sectional view of an off-time lighting type three-way switch. 3A and 3B show an indicator lamp unit, where FIG. 3A is a plan view, FIG. 3B is a cross-sectional front view of an essential part, and FIG. 3C is a bottom view. 4A and 4B show the contacts of the indicator lamp unit, where FIG. 4A is a front view, FIG. 4B is a plan view, and FIG. 4C is a sectional view in a compressed state.

  In this embodiment, the off-time lighting type three-way switch includes the case 1, the terminal fitting 10, the indicator lamp unit 20, the switch mechanism 30, and the handle 40.

  The case 1 has a substantially rectangular parallelepiped shape, includes an insulating body 2 and an insulating cover 3, and forms a component storage space for storing the terminal fitting 10 and the switch mechanism 30 at a predetermined position. Yes. Further, the body 2 and the cover 3 are integrated by a coupling metal fitting 4.

  The body 2 is formed by molding, for example, an insulating resin. The body 2 has an upper surface opened, and the inside is recessed to provide most of the component storage space. The component storage space further includes components stored therein. It is divided into multiple areas so that it can be dropped. A plurality of insertion holes 2a of the wiring cable and a driver insertion hole 2b adjacent to the wiring cable are formed so as to be distributed on both ends in the longitudinal direction of the body 2 and penetrate the bottom surface.

  Further, two sets of support stepped portions 2c are formed at both opening edges in the longitudinal direction of the body 2 so as to be separated from each other along the longitudinal direction, and accordingly, four sets on the left and right. These support steps 2c are for supporting a later-described indicator lamp unit 20 at a predetermined position, and are a pair spaced apart in the longitudinal direction of the body 2 protruding upward from the opening edge as shown in FIG. Formed between the projections 2c1 and 2c1. Therefore, the bottom part of the support step part 2c has the same height as the opening edge, and the protrusion 2c1 protrudes upward from the opening edge.

  Further, on the side surface in the longitudinal direction of the body 2, a locking step 2d and a leg fitting groove 2e for locking a coupling fitting 4 described later are formed as a set at both ends in the longitudinal direction.

  The cover 3 is a means for closing the opening of the body 2. Then, a part of the lower portion of the cover 3 is fitted into the opening of the body 2, so that the case 1 is configured at a predetermined position with respect to the body 2.

  Further, a boss 3a is formed at the center of the cover 3 so as to protrude upward. Further, the boss portion 3a is formed with a through hole 3b communicating with the inside of the case 1 so that a handle 40 described later can be exposed. Although not clearly shown in FIG. 2 on the lower surface of the cover 3, it is fitted to a position facing the support step 2 c of the body 2, and the locking piece of the indicator lamp unit 20 shown in FIG. A pressing portion that presses 21 a and applies a required contact pressure to the contact 22 is formed.

  The coupling fitting 4 includes a base portion 4a, a leg portion 4b, a locking portion 4c, and a mounting frame engaging claw 4d, and a pair of the body 2 and the cover 3 are coupled at both longitudinal ends of the case 1. To do. The base portion 4 a extends across the upper surface at both ends in the longitudinal direction of the cover 3. A pair of leg portions 4b are formed so as to extend from both ends of the base portion 4a along both side surfaces of the body 2, and are fitted into the leg fitting grooves 2e of the body 2. The locking portion 4 c is formed at the lower end of the leg portion 4 b and engages with the locking step portion 2 d of the body 2 to couple the body 2 and the cover 3. The mounting frame engaging claw 4d protrudes in the length direction of the case 1 from the side edge of the base portion 4a. And it is comprised so that an embedding type wiring instrument may be attached to an attachment frame by engaging with the attachment frame which is not shown in figure.

  As shown in FIG. 2, the terminal fitting 10 includes a frame portion 11, a lock fitting 12, and an unlocking operation tool 13. The frame portion 11 has an upper surface portion 11a, a contact surface portion (not shown), a lock fitting support surface portion 11b, and a connection piece portion 11c in a state where the frame portion 11 is dropped into a predetermined space in the body 2, and a conductive metal plate. The above-mentioned parts are integrally formed by bending. The connection piece 11c is connected to a predetermined part of the switch mechanism.

  The locking metal fitting 12 is formed by bending a leaf spring, and includes a pressing piece 12a, a support piece 12b, and a locking piece 12c. The pressing piece 12 a presses the core wire (not shown) of the wiring cable inserted into the terminal fitting 10 from the bottom surface of the case 1 through the insertion hole 2 a against the contact surface portion of the frame-like portion 11. To conduct. The connecting piece 12b integrally connects the intermediate between the pressing piece 12a and the locking piece 12c, and is supported with the back surface coming into contact with the locking fitting support surface portion 11b of the frame-like portion 11. The locking piece 12c prevents the free end of the locking piece 12c from biting into the core wire of the wiring cable inserted into the terminal fitting 10 in the retaining direction and inadvertently disconnecting the connection with the terminal fitting 10.

  The locking piece unlocking operation tool 13 is made of a resin molded body, is accommodated in the terminal fitting 10 so as to be tiltable, and has a driver receiving portion 13a and a cam portion 13b. The driver receiving portion 13a is disposed so as to face the driver insertion hole 2b of the body 2, and a minus driver can be preferably press-fitted between the driver insertion hole 2b and the driver receiving portion 13a. Although the cam portion 13b is in contact with the locking piece 12c, the locking piece 12c is not displaced by this. When the engagement of the lock fitting 12 with the lock piece 12c is released and the core wire of the wiring cable is removed from the terminal fitting 10, a minus driver is press-fitted between the driver insertion hole 2b and the driver receiving portion 13a. Then, the cam portion 13b of the locking piece unlocking operation tool 13 displaces the locking piece 12c in the direction away from the core wire against the elasticity of the locking metal fitting 12, so that the engagement between the locking piece 12c and the core wire is performed. It is cancelled | released and a core wire can be extracted from the terminal metal fitting 10. FIG.

  As shown in FIG. 3, the indicator lamp unit 20 is integrated with resistors R <b> 1 and R <b> 2 in addition to the wiring substrate 21, the contact 22, and the indicator lamp 23 as an energization unit.

  The wiring board 21 is sized to substantially cover the opening surface of the body 2, but one side of the central portion in the longitudinal direction is cut away for the operation of the switch mechanism 30 and has a substantially U shape in plan view. ing. Further, four locking pieces 21a are formed so as to protrude laterally on both sides in the longitudinal direction and at positions separated from each other. The locking piece 21 a is in a predetermined position with respect to the body 2 by being fitted to a support step portion 2 c formed on the opening edge of the body 2. Furthermore, two conductive portions 21b and 21c are formed on the wiring board 21 and serve as an electric circuit for the lighting circuit. One end of each of the two conductive paths 21b and 21c forms indicator lamp connection terminals 21b1 and 21c1, and the other end forms contact connection terminals 21b2 and 21c2 for contacts 22 and 22 described later. An insulating plate 21d is attached to the lower surface of the wiring board 21 so as to cover the indicator light connection terminals 21b1 and 21c1.

  As shown in FIG. 4, the contact 22 is composed of a compression coil spring wound around a spiral having a substantially inverted conical shape. Then, it is mounted on the lower surface side of the wiring board 21. Accordingly, since the wiring board 21 exerts a pressing force on the substantially conical tip portion, the tip portion is pressed against the upper surface portion 11 a of the frame portion 11 in at least the pair of terminal fittings 10 disposed in the body 2. Thus, the display circuit can be securely connected to the power source.

  Further, the contact 22 has a turn end portion of a conical base portion bent toward the center of the circle, and further bent outward in the axial direction at the center of the circle to form a leg portion 22a. The leg portion 22a is mounted on the two conductive portions 21b and 21c of the wiring board 21 by being inserted into the insertion holes of the connection terminals 21b2 and 21c2 of the wiring board 21 and soldered.

  The indicator lamp 23 is composed of a neon lamp which is a kind of glow discharge lamp, and is mounted on the upper surface of the wiring board 21 and connected to the display circuit.

The resistor R1 is used in the case of an on-time lighting type (on-pica) three-way switch, and is connected between the indicator lamp connection terminals 21b 2 and 21c 2 and connected in parallel to the indicator lamp 23. Thus, because of the floating capacitance of the indoor wiring, the indicator lamp 23 acts so as not to malfunction when turned off. In the case of the off-time lighting type three-way switch of this embodiment, the resistor R1 is unnecessary.

  The resistor R2 is interposed in series in the land 21c of the wiring board 21 and acts as a current limiting means for the indicator lamp 23.

The switch mechanism 30 is, as shown in FIGS. 2 and 1 (f), a central portion between the terminal fittings 10 and 10 disposed on both ends in the longitudinal direction of the body 2, and the upper side in FIG. 1 (f). It is arrange | positioned in the position biased to. Two fixed contacts 31 and 32 are spaced apart opposite, between them the movable contact 33 contacts the one of the two fixed contacts 31 and 32 swings.

2, the right side of the terminal fitting 10 is connected to the movable contact 33, the left side of the two upper and lower terminal fittings 10, 10 at (f) in FIG. 1 is connected to two fixed contacts 31 and 32. Further, in FIG. 2, the variable dynamic contact 33, the left Te (f) odor 1 and is in contact with the terminal fitting 10 located on the lower side. In addition, the movable contact 33 is abbreviate | omitted in (f) of FIG.

  As shown in FIG. 2, the handle 40 is disposed in the through hole 3b of the boss portion 3a in the cover 3 of the case 1 so as to be able to reversely swing, and the operation portion is exposed to the outside. In addition, the handle 40 includes an operation unit 41 and a drive unit 42 that are integrally molded. When the operation unit 41 is operated, the drive unit 42 cooperates with the switch mechanism 30 so that the movable contact 33 is brought into contact with either one of the fixed contacts 31 and 32 by reversing speed. Further, a display window 43 is formed in the handle 40, and the light emission of the indicator lamp 23 is led out to the outside. If desired, a large operation handle (not shown) can be provided separately from the handle, and the handle 40 can be linked to the operation handle. This makes it easier for the user to operate the wiring device.

  FIG. 5 shows an indicator lamp unit in an off-time lighting type single-sided switch as a second mode for carrying out an embedded wiring fixture having an indicator lamp of the present invention, (a) is a plan view, (b) ) Is a cross-sectional front view of the main part, (c) is a bottom view, and (d) is a right side view. The same parts as those in FIG.

  In this embodiment, the pair of contacts 22, 22 are distributed and arranged on both ends in the longitudinal direction of the wiring board 21 so as to contact the upper surface of the frame portion of the two terminal fittings on the input side and the load side. It is arranged. Corresponding to this arrangement, the two lands 21b and 21c of the wiring board 21 are formed so that the extending directions are orthogonal to each other as shown in FIG.

The figure which shows the assembly state of the whole three-way switch of the lighting type at the time of OFF as a 1st form for implementing the embedded type wiring instrument provided with the indicator light of this invention Cross section of the three-way switch that is also lit when off The figure which also shows the indicator light unit The figure which similarly shows the contact of an indicator light unit The figure of the indicator light unit in the one-way switch of the lighting type at the time of off as a 2nd form for carrying out an embedded type wiring instrument provided with the indicator lamp of the present invention

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Case, 2 ... Body, 2a ... Insertion hole, 2b ... Driver insertion hole, 2c ... Supporting step part, 2c1 ... Projection, 2d ... Locking step part, 2e ... Leg part fitting groove, 3 ... Cover, 3a ... Boss portion, 3b ... through hole, 4 ... coupling bracket, 4a ... base portion, 4b ... leg portion, 4c ... locking portion, 4d ... mounting frame engaging claw, 10 ... terminal fitting, 11 ... frame portion, 11a ... upper surface 11b: Locking bracket support surface, 11c: Connection piece, 12 ... Locking bracket, 12a ... Pressing piece, 12b ... Supporting piece, 12c ... Locking piece, 13 ... Locking piece unlocking operation tool, 13a ... Driver receiving portion, 13b ... cam portion, 20 ... indicator unit, 21 ... wiring board, 21a ... locking piece, 21b, 21c ... land, 21b1, 21c1 ... indicator connecting terminal, 21b2, 21c2 ... contact connecting terminal, 21d ... Insulating plate, 22 ... Contact, 22a ... Leg, 23 ... Indicator lamp, R , R2 ... resistors, 30 ... switch mechanism, 31, 32 fixed contacts, 33 ... movable contact, 40 ... handle, 41 ... operation unit, 42 ... drive unit, 43 ... display window

Claims (2)

A case with an insulating body having an opening on the top surface and a case with an insulating cover for covering the opening of the body, and a plurality of terminal fittings each provided with a frame portion and dropped into positions separated from each other inside the body And an indicator lamp unit disposed between the opening edge of the body and the cover and disposed in the case;
The indicator lamp unit is integrated with at least a current-carrying part, a contact, and an indicator lamp, and the current-carrying part forms a required display circuit and is formed to project from the left and right side edges to the left and right. And a contact piece that is sandwiched between the opening edge of the body and the cover, and the contact element is formed of a compression coil spring wound in a spiral having a substantially inverted cone shape, and the lower surface of the current-carrying portion The display circuit is connected to the power source by pressing the upper end of at least one pair of the frame parts of the terminal fitting , the tip of which is mounted in the body, and the display lamp is connected to the upper surface of the energizing unit. Is mounted on and connected to the display circuit;
An embedded wiring apparatus having an indicator light characterized by the above. The case includes a support step formed by protrusions protruding upward from both longitudinal sides of the opening edge of the case, and the cover is configured to cover the support step of the body;
The indicator lamp unit is supported at a predetermined position in the case by engaging locking pieces formed on both side edges of the energizing portion with the support step portion of the body and being pressed by the cover;
An embedded wiring apparatus provided with the indicator lamp according to claim 1.

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