JPS5844673A - Signal connector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic control device such as a sequence control device, and more particularly to a device equipped with a highly noise-resistant signal connector. In general, the controller 1 is connected to the controlled device 12! as shown in FIG. captures the signal through the input signal II5, sends the signal to the controlled device 2 through the output signal II4,
It is customary to implement this function. In this way, the input signal @
5 and output signal line 4It is essential for a control system with general feedback, and the special output signal line 4 is also essential for a control system without feedback as shown in Figure 2. In this case, noise generated by the controlled device 2, specifically, electrical impulses, surge voltages, etc., are applied to the input signal line 1 and the output signal 1.
14t- Noise often enters the control 1!1 through the controller 1. If the controller 1 is electronic, especially one that uses a microcomputer or the like and uses a relatively small electrical signal, noise may enter the controller 1!1. function may be impaired. It is well known that there are generally two types of noise induced by the input/output signal lIK: normal mode noise and common mode noise. 1. This is the noise induced between the i-2 line, and the common moat noise is the noise induced between the signal line 1 and the ground circuit, for example, between 4-1.5 shown in Figure A3. These noises are applied to the front control unit 1 through the input signal line and output signal line, causing malfunction or functional failure of the controller. As a means to remove the two types of noise mentioned above, several noise countermeasure elements or devices can be considered, or from the viewpoint of versatility and effectiveness, optical signal connectors (hereinafter referred to as f) are generally used.
It is called a photocoupler. ) Use F! High degree. The principle circuit using this photocoupler is shown in FIG. In the figure, 6 is a photocoupler, and when this photocoupler is used, the control iJ1 and the controlled device 2 are completely electrically isolated, and the signal generated on the input signal line 3 and output signal line 4 is Common Mo! - Most of the noise does not enter the controller 1. However, the capacitance C between the input and output circuits in the photocoupler increases, and there may be a slight leakage of force ζ, but the influence is extremely small.In addition, the above-mentioned normal moat noise also affects the input 1- of the controller 1. The device simply turns on and off the phototransistor 6A in the photocoupler 6 connected to the controller 1, and this noise can be removed by providing an appropriate noise filter (not shown) in the controller 1. It is. More output signals! na-1e 4-'
It is clear that the above normal mode noise is not transmitted to the controller 1, and measures should be taken to prevent the phototransistor 6 in the photocoupler 6 from being destroyed by noise in the normal mode countermeasures and 17, but the noise is extremely strong. In this case, there are some reliability problems with the 7 Oto couplers currently on the market, and sometimes the above
) Ranjistaro A was sometimes destroyed, which was a problem. In the fM4 diagram, the photocoupler 6 is attached to the controller 1 side, but is this because the controller 1 is at a low level? 4
It is intended to avoid exposing the controller to noise, and is generally equipped with a 10-case controller case (which also serves as a shield).
Usually, 7 Otocouplers are installed inside. Commercially available photocouplers have a structure in which both the input and output circuits are mounted on the same printed board, but in the case of a structure like this, when the photocoupler is mounted on the printed board,
Due to the noise between the circuits on the printed board, the amount of noise that passes through the input line 18 and the output signal line and enters the electronic circuit in the control 61 is due to the photopower mentioned above. 1) Compared to a capacitance based on a single input/output circuit, the L-Hiroko circuit 1 is considerably increased, which has disadvantages such as malfunction of the controller 1 or damage to the electronic circuit. ◎ The present invention has the above-mentioned shortcomings [*] - The purpose is to provide a signal connection that can significantly improve the high noise resistance of electronic controllers!!
The I/C FA that provides the device is completely separated from the light-emitting part and light-receiving part of the optical signal connection, and a pair of fitting bodies each formed separately is configured to have a fitting OT function. It is characterized by:

Hereinafter, a detailed explanation will be given based on the t-S plane of an embodiment of the invention. Figure 5 shows the principle circuit of the signal connector of the present invention, and in the figure, 7 is an infrared light emitting diode or a gallium The light emitting part is made up of a light emitting diode 8 formed of a material such as arsenic, and a source resistor 9, and 10 is a light receiving part made up of a phototransistor 11 and a source resistor 12. Reference numeral 4 indicates that these two parts are separated and formed separately, and when in use, they are mechanically fitted together to form a signal contact. In both embodiments, the electronic circuit inside the controller is electrically separated from the input/output signal lines as completely as possible. First, Figure 6 shows two printed boards parallel to each other, and the rectangular one is a signal transmission means of the present invention between the input/output signal side board &13 and the electronic circuit side main board 14. A state in which the connection &F15 is attached to the above-mentioned Aya base gear is shown. Reference numeral 8 in the figure is a light emitting diode, and the illustration of the light emitting fiIII resistor 9 described in FIG. 5 is omitted. A light-emitting 1lill fitting body 18 is made by applying F-packaging to a highly insulating 15 snack 17 made of boxy resin or silicone resin, etc.
It's intimidating.

A square hole for inserting the light emitting side fitting body 18 is housed in a part of the human output signal side mounting plate 15, and when the light emitting side fitting body 1st is inserted into this square hole. , the locking piece 18a provided on a part of the fitting body 18 plays the role of a stopper, and the fitting body 18 is connected to the input/output (IF No. 11411 Taiban 1
3 indicates the signal terminal of the light emitting part. In the figure, reference numeral 11 denotes a phototransistor, and illustration of the light-receiving resistor 12 described in Section 5-9 is omitted.

A light tube body 19 is provided in the light receiving portion of the phototransistor 11 similarly to the light emitting diode 8.
The light receiving @fitting body 2o is constructed in the same manner. A fitting portion 2° is provided on the upper surface of the light-receiving side fitting body 2o so as to be able to fit with the bottom 518B of the light-emitting unit 18, and when the inner fitting bodies 18 and 2o are fitted, light emitting diode 8
and 7e)) The optical axes of the range meta 110 are configured to match. In addition, when mating, the structure is such that light can pass through from the outside. A locking piece 20B is similarly provided on a part of the light receiving plate 20, and the electronic circuit side main body board 14 is similarly provided with a locking piece 20B. A square hole (not shown) is provided, and the light receiving body 20 fitted with the light emitting side body 18 is inserted into this square hole.
011A is attached to both boards 13 and 14.
shows the signal terminal of the phototransistor 11@Here, FIG. 6 shows the light emitting diode 8 and the phototransistor 1-1.
? We have described an embodiment for a set of signal transmission in each case in a single state, that is, two printed boards parallel to each other.As shown in FIG. As shown in the figure, a plurality of light emitting diodes (81 to 8 in the figure) are provided inside the light emitting side fitting body 18 as means for transmitting the signal between the light receiving side fitting body 2 and the light receiving side fitting body 2.
Inside 0, there are the same number of phototransistors (113 to 1 in -) at positions corresponding to the light-emitting diodes and the optical axis.
1.) A signal connector consisting of a light-emitting side fitting body 18 and a light-receiving II fitting body 2o in which a plurality of light emitting parts and light receiving parts are biased is also considered. As shown in FIG. 7, in order to facilitate the wiring of the dice forming the light emitting part and the light receiving part, the anode 21 and the collector 22 are installed in the elements of the light emitting part and the light receiving part.
All terminals that can be connected in common are connected in common, and the inner fitting body 18
It is also conceivable that common terminals 21A and 22 are provided on the surface of 20 and 20.

Furthermore, as shown in FIG.
The base 2s of the phototransistor provided at t is connected to the fitting body 2
It is also conceivable that the transistor 11 can be biased as an external terminal 23 with NL extended to the outside of 0. In addition, as shown in FIG. 9, the number of emitters and light receivers tζ and FIG. 8, the light emitting diode 8t- is different from that shown in FIG.
One photo 5:y-) meta 11t- corresponding to 3
A plurality of these are arranged in each fitting body (not shown), and further.

In Figure 9, light emitting diode B? It is also easily conceivable that the light emitting diodes 81 are aligned in a straight line (not shown) using a reflector (not shown) or the like without being tilted. In this case, the printed circuit boards were made up of two boards parallel to each other, but as shown in No. 11-, even when the two boards are on the same plane, close to each other, and butted against each other, no light is emitted. The side fitting body 1B and the light-receiving side fitting body 20 are in a securely fitted state, which enables signal transmission between the boards. , 14 can be installed at right angles to the wire. However, when the two boards are installed at any angle, both of the above-mentioned mating bodies 1 and 20 It goes without saying that this is possible by changing the shape of the.

In the various embodiments described above, a recessed groove-shaped fitting portion 20m is provided as a fitting means for both the combined bodies 1B and 20. As shown in Fig. 13, a protruding pin 24 is provided on the fitting body 18@, and a hole 25 is provided in the receiving part of the protruding pin 24 on the side of the traveling combined body 20, which is opposite to this, so that the fitting body 18@ is provided with a hole 25. In addition, there are also those with fixed screws, etc., those with sliding fitting parts, those with pressurized deformation using hinges, claws, etc., and those with similar fitting means. It is something that can be considered.

In addition, the mounting means, etc. to the two 1-lint boards of the two stations combined are also subject to immemorial torture. Although the structure is such that the fused body with the stopper piece is inserted into the square hole, the present invention is not limited to this embodiment. It is also possible to fix it to a printed circuit board using the -combination as a means of starting the pond (or use adhesive, etc.)
The signal connector of the present invention has a force ζ sequence that can be applied to the substrates of various products! Control equipment, etc., especially, other noise sources.
An example of this is the operation of the gallbladder, ``magnetic valve, motor, etc.''
When used in a fiber controller with a built-in microcomputer that performs 1+-, the anti-noise α ability is maximized. In addition, in the present invention, parallel transmission is used as the signal transmission format, but if serial transmission is used, the element values of the light emitting section and the receiving section will decrease, and this will cause problems in history. 0 In the present invention, in order to block the shadow of noise on the ship, as shown in FIG. If the entire shield body, such as an Arun plate, is interposed in the shield body locking portion 20G, further effects can be obtained. In addition, as shown in the above-mentioned intervening position 1jit'' of the shield body 26, the recommendation is 151mK, the 26 or 26 to either the combined station 1B or 20.
The same effect as described above can be obtained even if the shield body is interposed at the position , that is, the electrical noise generated when two 1-lint plates are brought close to each other can be reliably removed. , c9. It becomes possible to provide a signal connector with even better noise resistance. 180 in 15 stripes
Also, Figure 16, which is the shield body locking part, is the shield body 2.
1! The fitted body 1'8. 20g), making it easy to hold the shield body ◇The surface of the shield body 26 is sandwiched between the two fittings. !Since the shield is arranged so as to pass, the shield may be more perfect q).In other words, -sound is transmitted directly between the four straight bodies, so the noise that enters through the hole in the shield body is absorbed by the light. ttC only, light reception, fJll
If the T/C construction of the present invention is carried out, the light-emitting part and the light-receiving part of the original signal connector such as 7 Otokagura can be separated and formed separately, and the pipes can be separated. This allows the printed circuit board W of the electronic system W to be completely separated into a four-element circuit main body board and an input/output signal thin board. This makes it possible to reduce the number of circuits on each board, compared to the conventional case where one child circuit, input/output signal i1i@14, and 7 input/output circuits are mounted on the same board. The 1# capacitor head between the circuits is significantly attenuated, and along with it, the noise that suddenly occurs in the input/output signal is also suppressed by the strong I! Due to the green effect, noise intrusion into the electronic circuit is completely blocked. Therefore, it is possible to provide a signal connector that is extremely noise resistant without destroying the multiplex circuit or modifying the controller.

IPay invention? Connecting awns to sequence control devices, etc.
It has a built-in microcomputer that controls the operation of other strong electric currents and devices that generate noise, as well as sequence control of input and output according to the user's program IKX. :, electronic control atc
In order to compensate for the noise 1, noise 1 is significantly reduced - to the extraction circuit of a microcomputer, etc.C) Noise intrusion can be completely quickly cut off, so even if noise is suddenly emitted from the input/output signal, the influence qI? It is possible to provide a product that has excellent effectiveness, such as highly reliable sequence control that is completely free from damage and malfunctions.

In addition, the structure is simple compared to the second low coalescence of the present invention,
The fitting means is also very stable, and the optical axes of the light-emitting part and the light-receiving part are easy to match accurately, so it is ridged.

In addition, it is possible to provide a signal connector with great practical value, such as being able to transmit accurate signals, and being easy to handle because it can be easily attached to or detached from a board, etc. If a shield is interposed between the mating part of the assembly or the inner mating body, the electrostatic noise generated on one board will be completely eliminated by this shield plate.
Ic1l can be disconnected, noise intrusion into the other board can be completely eliminated, and a good signal connector with better noise resistance can be provided.

[Brief explanation of the drawing]

FIGS. 1 and 2 are explanatory diagrams showing the connection configuration of conventional controllers,
Fig. 3 is an explanatory diagram showing the state of noise generation, Fig. 4 is a principle circuit diagram when using a conventional optical signal connector, Fig. 5 is a principle circuit diagram of the signal connector of the present invention, and Fig. 6 is FIGS. 14 to 16, a front view showing one embodiment of the present invention with the signal connection portion transparent, are longitudinal sectional views of other embodiments. 8... Light-emitting part, 11... Light-receiving part, 1... Light-emitting side fitting body, 20... Light-receiving side fitting body agent Patent attorney Susuki 1) Ri-tei? h365-

Claims (1)

[Scope of Claims] 1. A signal connector characterized in that the light-emitting part and the light-receiving part of the optical signal connector are separated and formed as separate bodies, and the two are configured to fit together. 2. The signal connector according to claim 1, wherein the light emitting part and the light receiving part are each attached to two single-lint boards. 3. Between the light emitting part and the light receiving part The signal connector according to claim 1, wherein a shield body is interposed 4, and the shield body is arranged at a position intersecting the optical path between the light emitting part and the light receiving part.