JPH0214111Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a reed relay for matrix drive used in switch circuits of electronic equipment, which allows any circuit to be assembled freely, is easy to implement and maintain, and has high magnetic efficiency. This also enabled a winning lead relay.

FIG. 1 shows the basic principle of the reed relay according to the present invention, which is already known. SW is a reed switch, and in addition there is an X direction coil Cx ₁ .
Cx ₂ are wound in opposite directions. Further, Y-direction coils Cy ₁ and Cy ₂ are wound in opposite directions thereon. In this case, the X direction coil Cx ₁ ,
Cx ₂ is the right coil compared to the left coil Cx ₁
Assume that Cx ₂ has twice the number of turns. The Y-direction coils Cy ₁ and Cy ₂ have a turns ratio of twice as many on the left side as on the right side, and the coil with a larger number of turns
Cx ₂ and Cy ₁ have the same winding direction.

Figure 2 shows the operation of _the reed switch _SW when _the reed relay is energized _. In the case (c), both the X and Y coils are energized. When current is applied to the X direction coils Cx ₁ and Cx ₂ as shown in A, both coils Cx ₁
Since the winding directions of Cx and Cx ₂ are opposite, the direction of the magnetic flux is also opposite and they repel each other as shown in the figure. Therefore, the contacts of the reed switch SW are in an open state. Next, when the Y-direction coils Cy ₁ and Cy ₂ are energized as shown in (b), the winding directions are opposite to each other in this case as well, so
The direction of the magnetic flux is also reversed, repelling it as shown in the figure, and the reed switch contact becomes open.

However, when both the X and Y coils are energized as shown in C, they repel each other in the X direction and in the Y direction, but as mentioned above, the turns ratio is doubled between the left and right sides, and Coil with more turns
Since Cx ₂ and Cy ₁ have the same winding direction, the magnetic flux from the Y-direction coil Cy ₁ with a large number of turns on the left and the magnetic flux from the X-direction coil Cx ₂ with a large number of turns on the right are not canceled out and can form a magnetic loop. Therefore, the contacts of the reed switch SW are magnetized and magnetically attracted to each other to close.

This reed relay is used in an electronic switchboard as shown in Figure 3. Reference numeral 1 designates a coil bobbin made of synthetic resin, etc., and X-direction coils Cx ₁ and Cx ₂ and Y-direction coils Cy ₁ and Cy ₂ are wound around the outside of the coil bobbin as shown in FIG. Reference numeral 2 denotes a shielding plate made of a magnetic material, and this shielding plate 2 has a large number of holes arranged in a matrix, and a coil bobbin 1 is inserted into each hole.
A coil wound around is arranged. Figure 4 is a diagram showing how to wind the coil in this case.
After winding the Y _- direction coil Cy ₁ in the _order of Rn ₁ → R ₂₁ → R ₁₁ on the lower _side of Comes with ₂ rolls. In this way other lead relays
After winding the Y-direction coils from R _o2 to R _oo , further wind the X-direction coil Cx ₂ on the upper side of the shielding plate 2 and R ₁₁
After winding in the order of →R ₁₂ →R _1o , make a U turn and wind the lower side of the shielding plate 2 in the order of R _1o →R ₁₂ →R ₁₁ in the
I'm going to roll Cx ₁ . In this way, a coil is wound independently on one side of the shielding plate 2 for each row of relays.

When using a large number of reed relays arranged in a matrix, such as in an electronic exchange, such a configuration is acceptable, but when the number of switches is small, winding the coil is inconvenient and costs increase. Furthermore, mounting on a printed circuit board and maintenance are also inconvenient. The present invention solves these drawbacks and is an independent one.
Our objective is to provide a reed relay that can be manufactured easily and at low cost, easy to implement and maintain, and has excellent magnetic efficiency, even when configuring a matrix circuit individually or with any number of relays. do. To achieve this purpose, this invention
The cylindrical coil bobbin is made of synthetic resin and is integrally formed, and has flanges at both ends and the middle, and has a magnetic material inside the middle flange to provide magnetic shielding between the coils wound on both sides. One slit is formed in the middle flange in the radial direction, and the width of the shielding plate is made larger than that of the slit on the flange side to form a slit surface. The coil bobbin has a structure in which the shield plate is not exposed, and the flanges at both ends and the middle of the coil bobbin have a rectangular shape that corresponds to the shape of the rectangular cylindrical magnetic material case that is fitted around the coil bobbin. The base flange on the mounting side has chamfered parts corresponding to the four corners of the magnetic case to create a space between it and the magnetic case, and a lead terminal is molded on the base flange. A structure in which one end of each lead terminal protrudes from the base side flange toward the printed circuit board side, and the other end is exposed in the chamfered space described above to connect the terminals of the coil wound in the X and Y directions wound around the coil bobbin. The X-direction coil has a different number of turns on one side and the other of the coil bobbin, and the Y-direction coil is arranged in the slit so that the winding ratio is opposite to that of the X-direction coil when the coil bobbin is overlapped with the X-direction coil. A reed switch was inserted into the through hole of the cylindrical body of the coil bobbin, and the coil bobbin with the coil wound thereon was housed in a rectangular cylindrical magnetic case. The structure is characterized by the following.

Next, an embodiment of the reed relay according to the present invention will be described. Figure 5 is a cross-sectional view of the reed relay, with a reed switch SW installed inside the cylindrical coil bobbin 3.
is inserted. The coil bobbin 3 is provided with flanges F ₁ , F ₂ , and F ₃ at the center in the axial direction and on both left and right sides, and is integrally molded from synthetic resin. A shielding plate 4 made of a magnetic material and functioning as the shielding plate ₂ shown in FIG. 3 is molded on the middle flange F1 for dividing the coil bobbin into two in the axial direction.
And the X-direction coil is placed on the left side of the middle flange _F1 .
After winding Cx ₁ , wind X-direction coil Cx ₂ on the right side. Furthermore, the Y direction coil is placed on top of the X direction coil Cx ₁ .
After winding Cy ₁ , wind Y-direction coil Cy ₂ on top of X-direction coil Cx ₂ . Reference numeral 5 designates a cylindrical case made of magnetic material, into which a coil bobbin with a coil wound thereon as described above is inserted and fixed to each other by bending tongue pieces 6 and 7 at both left and right ends. Ru.

6A and 6B are a longitudinal cross-sectional view and an A-A' cross-sectional view of the coil bobbin 3, and FIG. 7 is an exploded perspective view of the coil bobbin 3 and the case 5. If the case 5 is a rectangular cylindrical body as shown in FIG. 7, each flange F ₁ ,
It is formed into a rectangular shape so that F ₂ and F ₃ can also fit therein. However, the terminals 81 to 84 side, that is, the base side flange F ₂ and the top end side flange F ₃ have chamfered corners and have a substantially regular octagonal shape. Then, lead terminals 81 to 84 are molded on _the base side flange _F2 as shown in FIG. ing.

In addition, the middle flange _F1 has one slit 10 formed therein, as shown in FIGS. 7 and 6A, and the shielding plate 4 has a relatively large slit formed therein. The metal shielding plate is designed to not be exposed. This slit 10 serves as a passage for the coils, and the X-direction coils Cx ₁ ,
Cx ₂ is connected to slit 1 after coil Cx ₁ is wound.
0 and moves above the middle flange _F1 , where the coil _Cx2 is wound. And again slit 1
0 and is connected to the inner end 82l of the terminal, and the winding start end is connected to the inner end 81l of the terminal.

Similarly, the Y-direction coils Cy ₁ and Cy ₂ have slits 10.
through the middle flange _F1 . Recesses 11 and 12 are formed in the flanges F ₃ and F ₂ at both upper and lower ends, into which the tongues 6 and 7 of the case are folded. As shown in Figure 5, the completed reed relay is mounted independently on a printed circuit board, and the terminal 81
84 and the tongue piece 13 of the case 5 are inserted and fixed into the through holes of the printed circuit board. In this way, the coil lead wire is drawn out to one end and connected to a single printed circuit board, making wiring extremely easy.

FIGS. 8A and 8B are diagrams conceptually showing the number of turns, winding direction, and terminal direction of a reed relay.

Figures 9 and 10 show how the reed relays R ₁₁ to R ₂₅ configured in this way are arranged in a matrix and the fourth
This is an example of a circuit similar to the one shown in the figure. FIG. 9 shows an example in which the reed relays are connected in parallel, and FIG. 10 shows an example in which they are connected in series. In the case of the present invention, since each reed relay is independent, wiring between them is performed using a wiring pattern on a printed circuit board.

As described above, the matrix drive reed relay of the present invention includes a coil bobbin made of synthetic resin with a cylindrical through hole, a reed switch inserted into the through hole, and a flange that divides the coil bobbin into two in the axial direction. At the same time, a magnetic shielding plate made of a magnetic material is inserted into the flange part and integrated, and an X-direction coil with a different number of turns is wound on one side of the two halves, and the other side is overlapped with the X-direction coil. The Y-direction coil is wound so that the turn ratio is opposite to that of the X-direction coil, and these are housed in a single cylindrical magnetic case. Therefore, by preparing a large number of independent reed relays and combining them arbitrarily, it is possible to freely configure not only matrix circuits but also other arbitrary circuits. Are suitable. In particular, unlike in the past, the coil is wound independently for each reed relay, so it is highly independent and easy to implement and maintain.

Additionally, since the coil bobbin around which the coil is wound is built into the case that also serves as a magnetic shield, not only is there less magnetic flux leakage and superior magnetic efficiency, but the coil is also protected from external forces. As described above, the matrix drive reed relay of the present invention is extremely independent, and is particularly suitable for products that are produced in small quantities in a wide variety. A further feature is the middle flange
Since the coil is wound on both sides of F ₁ , the middle flange F ₁
A slit 10 is provided for the coil to pass through, and the slit 10 has a structure in which the insulating portion is exposed (the metal magnetic shielding plate is not exposed), so that the insulation of the passing coil is not destroyed. Further, since the connecting portions between the coils on both sides of the intermediate flange _F1 do not pass through the outside of the intermediate flange _F1 but through the slit 10, the external size does not increase.

In addition, the base side flange _F2 has four corners chamfered to form a triangular space between it and the magnetic case 5, and lead terminals 81 to 84 are molded on the base side flange _F2 , so that each One end of the lead terminal is made to protrude from the base side flange F ₂ toward the printed circuit board side, and the other end is exposed to the triangular space formed by the chamfering described above, and the terminal of the coil wound around the coil bobbin 3 is connected to the triangular space. It is carried out in In this way, the terminal processing of the coil is carried out rationally by effectively utilizing the space within the case, thereby preventing the reed relay from becoming larger as a whole.

[Brief explanation of drawings]

Figure 1 is a diagram showing the basic configuration of a conventional matrix drive reed relay, Figure 2 is a diagram showing the operation of the same reed relay, and Figures 3 and 4 are examples of a matrix circuit constructed using the same reed relay. They are a perspective view and a circuit diagram. Fig. 5 and subsequent figures show an embodiment of the reed relay according to the present invention. Fig. 5 is a longitudinal sectional view, Fig. 6 is a longitudinal sectional view and horizontal sectional view of the coil bobbin, and Fig. 7 is a perspective view of the coil bobbin and the case. , Figures 8A and 8B are diagrams showing the winding direction and number of coil windings of a reed relay, the concept of the terminal direction, and Figures 9 and 10 are circuit diagrams of an example of a matrix circuit configured with the reed relay of the present invention. be. In the figure, 3 is a coil bobbin, 4 is a shielding plate,
5 is the case, Cx ₁ , Cx ₂ are the X direction coils, Cy ₁ ,
Cy ₂ is a Y direction coil.

Claims (1)

[Claims for Utility Model Registration] A cylindrical coil bobbin made of synthetic resin and integrally formed is provided with flanges at both ends and in the middle, and a coil bobbin wound between the coils wound on both sides within the middle flange. A shielding plate made of a magnetic material is inserted and integrated in order to provide magnetic shielding, and one slit is formed in the radial direction in the intermediate flange, and the shielding plate has a slit that is wider than the slit on the flange side. By increasing the width, the shield plate is not exposed on the slit surface, and the flanges at both ends and the middle of the coil bobbin have a rectangular shape that corresponds to the shape of the rectangular cylindrical magnetic material case that is fitted around it. The base side flange on the side that is attached to the printed circuit board is chamfered at the parts corresponding to the four corners of the magnetic case to form a space between it and the base side flange. Lead terminals are molded on the flange, and one end of each lead terminal protrudes from the base side flange to the printed circuit board side, and the other end is exposed in the space created by the chamfer described above, so that it can be wound around the coil bobbin in the X and Y directions. The structure is used to connect the terminals of the coil, and the X-direction coil has a different number of turns on one side and the other side of the coil bobbin, and when the coil bobbin is overlapped with the X-direction coil, the turn ratio is reversed from that of the X-direction coil. A reed switch is inserted into the through hole of the cylindrical body of the coil bobbin, and the coil bobbin with the coil wound thereon is wound in a rectangular cylindrical shape. A reed relay that is built into a case made of magnetic material.