JPH0328546Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a terminal structure of a wiring device used in a wireless switch that can open and close a load by remote control and hand control.

In the terminal structure of conventional wiring devices, the terminal component is inserted into the body and the terminal component is held down by a cover, so if the cover is damaged, the live part may be exposed or the terminal and other components may be damaged. There are problems in that the insulation from other parts is not sufficient, and that other components must be placed in locations other than the terminals, resulting in an increase in the size of the wiring device.

The present invention has been proposed in view of the above points, and by using a terminal holding plate that covers the terminal part, it aims to improve the insulation of the terminal part and secure a space in the body into which other mechanical parts can be inserted. In addition, the present invention provides a terminal structure for a wiring device that is intended to facilitate and ensure electrical connection between a terminal board of a terminal portion and a printed circuit board.

Embodiments of the present invention will be described in detail below with reference to the drawings. In the figure, 7 is a box-shaped body with an open top that constitutes the wireless switch main body A, and one side of this body 7 has a terminal storage section 9 that stores the terminal block B.
However, a board storage section 10 for storing the board block C is formed on the other side. As shown in FIG. 1, this terminal storage portion 9 has a quick-connect terminal plate 3 that is connected to an electric wire serving as a lead wire for connection from the outside such as a load or a power source, and a conductor of the electric wire is pressure-bonded to the quick-connect terminal plate 3. A terminal plate block B, which is a terminal part, including a lock spring 12, a release button 13, a display piece 14 for confirming the connection with the quick-connect terminal plate 3, and a coil spring 15 that biases the display piece 14 is housed.

Reference numeral 16 denotes a terminal holding plate made of an insulating material that covers and presses and fixes each of the above-mentioned members from above, and is screwed and fixed to the body 7 with tapping screws 17. Further, a cylindrical protruding rib 11 is provided on the upper surface of the terminal holding plate 16 in a protruding manner. A tongue piece 3a that projects upward is formed at the upper end of the quick-connect terminal plate 3.
The tongue pieces 3a are respectively inserted and locked into locking holes 19 of a printed circuit board 5, which will be described later, so that the quick connection terminal board 3 and the printed circuit board 5 are connected and fixed.

FIG. 2 shows the substrate block C, 2
It is composed of printed circuit boards 5 and 6 arranged in stages, an insulating plate 18 arranged between both printed circuit boards 5 and 6 to ensure insulation, and the like. One of the printed circuit boards 5 is equipped with power supply related members such as the quick connection terminal plate 3, a transformer T, and a relay 4, which are connected to a load and a power supply. The other printed circuit board 6 includes a light receiving section 2 that receives infrared rays from a transmitter 20 shown in FIG.
etc. are installed. The transmitter 20 has a size that can be held with one hand, has an operation button 22 on its top surface, and has an infrared light projection surface 23 formed on its tip surface.

Reference numeral 8 shown in FIG. 3 is a cover placed over the opening of the body 7, and the cover 8 and the body 7 constitute a case. The upper surface of this cover 8 has a stepped portion 2.
4 and 25 are provided protrudingly, and one stepped portion 24
An opening window 26 is bored in the opening 26, and a handle 27 constituting the operating switch 1 is inserted into the opening window 26. Press the stopper 28 against the cover 8 from within the groove 33 on the back side of the handle 27, and then tighten the tapping screw 29.
Fix the stopper 28 with. The stopper 28 is fixed by inserting one end into a groove 39 formed inside the cover 8 as shown in FIG. .

40 is a fixed spring fitted into the protrusion 41 of the handle 27. The handle 27 is urged upward by a coil spring 30. Handle 2
A triangular fulcrum portion 31 is formed on both sides of the fulcrum portion 7, and the lower end portion of this fulcrum portion 31 is shown in Fig. 5a.
As shown in FIG. 2, the handle 27 comes into contact with the upper surface of the stopper 28 and is rotatable about the fulcrum portion 31. Further, a protruding rib 32 that protrudes diagonally downward is integrally formed at the lower end of both end faces of the handle 27, and this protruding rib 32 is connected to the printed circuit board 6.
It is driven by pushing a handle 27 on push buttons 21a, 21a of microswitches 21, 21 mounted on the microswitches 21, 21.

A light-receiving window 34 is formed in the other stepped portion 25 of the cover 8, and the light-receiving surface of the light-receiving section 2 mounted on the printed circuit board 6 is positioned below the light-receiving window 34. A light-transmitting light-receiving plate 36 is attached to the light-receiving window 34 . Reference numeral 37 denotes a mounting frame to be attached to the wireless switch main body A, and openings 37a and 37b of the mounting frame 37
The step portions 24 and 25 of the cover 8 are inserted through the step portions 24 and 25 of the cover 8. The mounting frame 37 is made of die-cast aluminum, and its surface is coated black, so that it can be used for heat radiation when a power switching element is used, for example.

A drive circuit is mounted on the printed circuit board 6 to amplify and detect the output signal from the light receiving section 2 that receives the infrared rays emitted from the transmitter 20, and both printed circuit boards 5 and 6 are connected by a large number of lead wires 35. It has been done.

Then, insert the terminal block B into the terminal storage part 9 of the body 7, and then attach the printed circuit board 5 with the screws 4.
3 to fix it to the body 7. At this time, by inserting and locking the tongue piece 3a of the quick-connect terminal board 3 into the locking hole 19 of the printed circuit board 5, the printed circuit board 5 and the quick-connect terminal board 3 are connected to each other.
is fixed and electrically connected to. Then, the terminal holding plate 16 is fixed with tapping screws 17. Further, the terminal holding plate 16 is provided protrudingly between the terminal housing part 9 and the board housing part 10 of the body 7 as shown in FIG.
Movement is restricted by three ribs 50 shown in FIG.

The printed circuit board 6 on which the drive circuit for amplifying and detecting the output of the light receiving section 2 is mounted is attached to the cover 8 with screws 44. At this time, as shown in FIG. 5a, the handle 27 and the printed circuit board 6 The coil spring 30 is inserted between them as described above. The coil spring 30 is installed as shown in FIG. 5b. That is, the lower surface of the handle 27 has a pair of arcuate ribs 45, 45 and a long rib 4.
6 and 46 are integrally formed, and this arcuate rib 4
A guide groove is formed between the coil spring 5 and the long rib 46, and the upper end of the coil spring 30 is positioned and fixed in both guide grooves.

FIG. 5b shows a state in which the body 7 and the cover 8 are not connected and fixed, and are connected with an interval equal to the length of the lead wire 35 between the printed circuit boards 5 and 6. The body 7 and cover 8 are fixed with mounting screws 47 shown in FIG. Figure 6 shows body 7
The mounting frame 37 is shown attached to the cover 8 fixed to the cover 8. Further, electric wire insertion holes 48 are bored in the body 7 corresponding to the quick-connection terminal plates 3 of the terminal plate block B. When a conductor 49 of the electric wire is inserted into the electric wire insertion hole 48, the display piece 14 is inserted into the body 7.
This means that the electrical wire connections are visible from the outside.

In addition, the rib 4 shown in FIG. 5b of the terminal holding plate 16
2 is held down by the rib 59 of the cover 8,
The terminal press plate 16 is fixed in a double manner by the tapping screws 17 and the ribs 42, 59. Therefore, even if the wire is inserted into the wire insertion hole 48 with excessive force and the wire hits the terminal press plate 16, the terminal press plate 16 will not be damaged. In addition, since the terminal holding plate 16 is fixed at one place using the tapping screw 17, the number of assembly steps can be reduced, and the fifth
As shown in Figure b, a sufficient distance d can be maintained between the tapping screw 17 and the quick-connect terminal plate 3 to ensure insulation. When the body 7 and the cover 8 are connected and fixed, the lower end of the printed circuit board 6 attached to the cover 8 is close to the terminal block B, as shown in FIG. Since the entire terminal block B is covered with the terminal holding plate 16, insulation from the printed circuit board 6 on which the light current circuit is mounted is ensured despite the close proximity.

Further, even if the cover 8 is damaged by the impact load received during use, the so-called live portion of the terminal block B will not be exposed due to the terminal holding plate 16. Therefore, the printed circuit board 6 can be arranged as described above by insulation from the terminal block B by the terminal holding plate 16, and the operating switches 1 such as the handle 27 and the micro switch 21 can be arranged. Furthermore, the protruding ribs 11 of the terminal holding plate 16 are close to the printed circuit board 6, and because the coil springs 30 constantly press the printed circuit board 6, even if the printed circuit board 6 deforms over time, the protruding ribs will not disturb the printed circuit board 6. 11, the movement of the printed circuit board 6 is restricted. Therefore, the pressing load on the handle 27 does not change beyond a certain level.

FIG. 8 shows a block diagram. Reference numeral 55 is a light receiving element that receives infrared rays from the light receiving section 2 mounted on the printed circuit board 6, and the outputs thereof are input in parallel to the drive circuit 56 together with the manual operation switch 1. There is. The drive circuit 56 drives the relay 4 using an output signal from the light receiving element 55 or the operation switch 1, and opens and closes the contact 4A of the relay 4.
The primary side of the power transformer T is directly connected to the commercial power supply 57, and the secondary side of the transformer T is connected to the drive circuit 56.
It is supplied as power to the The load 58 will be connected to the commercial power source 57 via the contact 4A.

In the case of remote control, the transmitter 20 emits infrared rays, the light receiving element 55 receives the infrared rays, drives the drive circuit 56, activates the relay 4 such as a latching relay, and closes the contact 4A. Then, the load 58 is connected to the commercial power supply 57. When opening the contact 4A, the transmitter emits infrared rays again to drive the relay 4 and open the contact 4A.
In the case of manual operation, the relay 4 is driven by opening and closing the operation switch 1, and the contact 4A is opened and closed to connect or disconnect the load 58 to the commercial power source 57.

As mentioned above, the present invention consists of a case consisting of a body with an opening on one side and a cover that covers the opening of this body, and is connected to external lead wires and has tongues integrally formed at key points. A terminal section consisting of a terminal board or the like is housed and arranged in the body, the terminal section is covered and held down with a terminal holding plate made of an insulating material from above the terminal section, and an electronic circuit member is attached to the terminal section. A printed circuit board having a locking hole for inserting and locking the tongue piece of the plate to make an electrical connection is housed and disposed in the body, and first ribs are provided at key points on the periphery of the body-side surface of the terminal holding plate. This first
a second rib protruding from the cover that presses against the rib;
In addition to fixing the terminal holding plate to the body with screws, when the cover is placed over the body, the second
Since the terminal holding plate is clamped and fixed between the cover and the body by contacting the first rib of the terminal holding plate, the terminal holding plate can cover the terminal portion of the terminal board, etc. As a result, other printed circuit boards equipped with electronic circuits for low-voltage applications can be placed close to the terminal section via the terminal holding plate, and can also be covered with the body during use. The terminal holding plate prevents the live parts of the terminal from being exposed even if the cover is damaged.Furthermore, the terminal holding plate ensures insulation, so that the top surface of the terminal cannot be exposed to other printed circuit boards or other components. The members can be arranged, and therefore the overall size can be reduced. In addition, by holding and fixing the terminal part with the terminal holding plate, the terminal holding plate also serves to secure the terminal part to ensure the insulation properties of the terminal part, instead of fixing the terminal part with other parts. , no separate fixing member is required, and since the terminal holding plate is clamped and fixed between the body and cover, the terminal holding plate is installed inside the case and cannot be used unless the entire case is disassembled. The plate does not come off, and therefore, the terminal holding plate has the effect of further increasing the insulation of the terminal portion.

Furthermore, a first rib is provided protruding from the peripheral edge of the body side surface of the terminal holding plate, a second rib that presses the first rib is provided protruding from the cover, and the terminal holding plate is secured with a screw. In addition to being fixed to the body, when the cover is placed over the body, the second rib of the cover comes into contact with the first rib of the terminal holding plate, and the terminal holding plate is clamped and fixed between the cover and the body. The terminal holding plate is double-fixed by screws and second ribs, and when connecting a lead wire from the outside to the terminal, the lead wire may be inserted with excessive force and the terminal holding plate may be damaged. The terminal holding plate will not be damaged even if it hits the plate.
Therefore, there is an effect that the live parts of the terminal part are not exposed and the terminal part can be completely insulated from the printed circuit board for light electrical power, which can be placed with the terminal holding plate interposed therebetween. Moreover, instead of simply clamping and fixing the terminal holding plate between the body and the cover, the terminal holding plate is fixed to the body with screws, and then the second
The first rib of the terminal holding plate is pressed against the first rib of the terminal holding plate, and the terminal holding plate is clamped and fixed between the body and the cover, which prevents the terminal holding plate from shifting and improves assembly work efficiency. It is effective. In addition, the tongue piece of the terminal board and the locking hole of the printed circuit board that is directly electrically connected to the terminal board have the advantage that the terminal board and the printed circuit board can be securely and easily connected and fixed.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a terminal board block according to an embodiment of the present invention, Fig. 2 is an exploded perspective view of the board block of the above, Fig. 3 is an exploded perspective view of the cover side of the same, and Fig. 4 is an exploded perspective view of the same as the above. A perspective view of the transmitter, FIG. 5a is a sectional view of the wireless switch main body, and FIG.
Figures 6a and b are cross-sectional views and front views showing the mounting frame attached to the wireless switch body, Figures 7a and b are side views and rear views of the same, and Figure 8 is the same block. It is a diagram. 3 is a terminal board, 3a is a tongue piece, 5 is a printed circuit board,
7 is the body, 8 is the cover, 16 is the terminal holding plate, 1
9 is a locking hole, 42 is a first rib, and 59 is a second rib.

Claims (1)

[Scope of utility model registration request] The case consists of a body with an opening on one side and a cover that covers the opening of the body, and the terminal section is connected to a lead wire from the outside and consists of a terminal plate, etc. with a tongue piece integrally formed at a key point. is housed and arranged in the body, the terminal part is covered and held down with a terminal holding plate made of an insulating material from above the terminal part, and an electronic circuit member is mounted and inserted and locked with the tongue piece of the terminal board. A printed circuit board having a locking hole for electrical connection is housed in the body, and a first rib is provided protrudingly at key points on the periphery of the body-side surface of the terminal holding plate. A second rib is provided on the cover that presses against the rib, and the terminal holding plate is fixed to the body with screws.
A terminal structure for a wiring device comprising a terminal holding plate which is held and fixed between the cover and the body by coming into contact with the ribs of the wiring device.