JP3565874B2 - Sensors and connectors - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a sensor whose output mode can be switched.
[0002]
In recent years, miniaturization of sensors has been progressing, and for example, ultra-small photosensors with a built-in amplifier have also appeared. Some of these sensors can switch the output form upon detection, and it is desired to improve the convenience of switching at the time of mounting and use.
[0003]
[Prior art]
2. Description of the Related Art Conventionally, sensors such as photomicrosensors with built-in amplifiers have a light-on ON type in which a signal is output when light is detected, and a light-in ON / OFF type in which a signal output is switched ON and OFF when light is detected. There are different things. Hereinafter, a photomicrosensor with a built-in amplifier will be described as an example.
[0004]
FIG. 4 shows a perspective view of a conventional transmission type photosensor. FIG. 4A shows a transmission type photosensor with a built-in amplifier. FIG. 4A shows a light incident state in which light from the light projecting side is received by the light receiving side and nothing is detected. ) Indicates a light-shielded state in which light is blocked and detected on the light receiving side.
[0005]
FIG. 4 (A), the (B), the photo-sensor 11 _A, the two sensing portions 13a that protrudes from the main body 12, the 13b, the light emitting portion 14a and the light receiving portion 14b is positioned to face the other surface A predetermined number of terminals 15 extend from the terminal. Note that an amplifier is built in the main body 12.
[0006]
Then, as shown in FIG. 4A, when the detection target 16 does not exist between the detection units 13a and 13b, the light receiving state is established, and as shown in FIG. 4B, the detection target 16 is detected between the detection units 13a and 13b. When the position 16 is located, the light is blocked.
[0007]
FIG. 5 is a perspective view of a conventional reflective photosensor. FIG. 5A shows a light incident state in which light on the light emitting side is received and detected on the light receiving side, and FIG. 5B shows a light blocking state in which light is not received on the light receiving side. Note that the photosensors in FIGS. 5A and 5B have a built-in amplifier as in FIG.
[0008]
FIG. 5 (A), the (B), the photo sensor 11 _B includes a light emitting portion 14a and the light receiving portion 14b is arranged in the detection portion 17 that protrudes from the main body 12, a predetermined number of terminals 15 from the other side Extend.
[0009]
Then, as shown in FIG. 5A, when the detection target 16 is positioned on the detection unit 17, light from the light emitting unit 14a is reflected by the detection target 16 and is received by the light receiving unit 14b to be received. State. Further, as shown in FIG. 5B, if nothing is present on the detection unit 17, the light reception unit 14b does not receive light and enters a light-shielded state.
[0010]
Here, FIG. 6 shows an explanatory diagram of an output form of a conventional photosensor. FIG 6 (A), (B) is shows the photo sensor 11 _A transmission type is the same case of the reflection type photosensor 11 _B.
[0011]
In FIG. 6A, the output form cannot be switched depending on the light receiving state, and the terminal 15 is composed of a power supply + terminal 15a, a signal line O terminal 15b, and a 0V − terminal 15c.
[0012]
FIG. 6B shows a configuration in which the output form can be switched. The terminal 15 has a short-circuit L terminal 15d in addition to the terminals 15a to 15c in FIG. 6A. is there. In this case, when the power supply + terminal 15a and the L terminal 15d are not connected, the light is turned off (FIGS. 4 (A) and 5 (A)), and when both are short-circuited, It switches to the ON mode when light enters.
[0013]
In the photosensor capable of switching the output form as shown in FIG. 6B, the switching is performed by short-circuiting the power supply terminal 15a and the L terminal 15d at the time of switching. Work done.
[0014]
[Problems to be solved by the invention]
However, photosensors that can switch the output form, especially ultra-small ones, are thin and often mounted in narrow places. When changing the output form after wiring once, the power supply + terminals 15a and L There is a problem that it is difficult to short-circuit or replace the terminal 15d.
[0015]
Further, the provision of the L terminal 15d causes a problem of erroneous wiring, and the presence or absence of the L terminal 15d leads to two types, resulting in a problem of complicated manufacturing and product management.
[0016]
Therefore, the present invention has been made in view of the above problems, and has as its object to provide a sensor that unifies products and improves the convenience of output switching.
[0017]
[Means for Solving the Problems]
The above object is achieved by a detection unit that performs detection on a detection target, a switching unit that switches between two output signals having different states according to the detection state of the detection target in the detection unit, and a switching unit that switches the output signals. And a terminal section including a single terminal for outputting the two output signals.
[0018]
[Action]
As described above, the output signals of two systems having different states are switched by the switching unit in accordance with the detection state of the detection unit, and one of the output signals is output from a single terminal of the terminal unit.
[0019]
As a result, the number of terminals of the terminal portion of the sensor whose output signal cannot be switched and the number of terminals of the terminal portion of the sensor of the present invention become the same, and it is possible to unify products.
[0020]
In addition, the switching section can be easily switched even after use of the sensor of the present invention even during use, so that the convenience of output switching can be improved.
[0021]
【Example】
FIG. 1 shows a configuration diagram of a first embodiment of the present invention. FIG. 1A is a perspective view, and FIG. 1B is a view showing a switch portion.
[0022]
1A and 1B, a sensor 21 is a transmission type photomicrosensor (not shown) with a built-in amplifier, and two projections 23a and 23b are integrally formed on a main body 22 formed of resin or the like. The light emitting unit 24a and the light receiving unit 24b are provided so as to face the protruding portions 23a and 23b, respectively. The light emitting unit 24a and the light receiving unit 24b constitute a detecting unit that detects a detection target (not shown).
[0023]
That is, a space is formed between the light emitting unit 24a and the light receiving unit 24b provided in the protruding portions 23a and 23b, and the detection state is established when the detection target is located in this space.
[0024]
In addition, in order to provide the light emitting part 24a and the light receiving part 24b, it is not always necessary to form the protruding parts 23a and 24b, and it is sufficient that a space is formed between the opposing light emitting part 24a and the light receiving part 24b. For example, only the detection portion of the main body 22 may have a concave shape.
[0025]
On the other hand, in the main body 22, a positive electrode 25a and a negative electrode 26a of a power supply system, an O electrode 27a of a signal system, and a switching L electrode 28 are formed. The L electrode 28 is for switching the output form by the detection in the detection unit, that is, for outputting either an ON signal or an OFF signal at the time of detection.
[0026]
The + terminal 25 for power supply extends from the + electrode 25a to the outside of the main body, and the-terminal 26 for power supply extends to the outside of the main body from the-electrode 26a. Then, the O terminal 27 extends from the O electrode 27a to the outside of the main body. The O terminal 27 outputs an output signal in the state of the L electrode 28. The terminal portion 29 is constituted by the + terminal 25, the − terminal 26, and the O terminal 27.
[0027]
The main body 22 has an opening 30 through which the + electrode 25a and the L electrode 28 are exposed, and a resin-made switching portion in which a short-circuit plate (not shown) is formed in the opening 30. The slide switch 31 is fitted. In the slide switch 31, an engagement portion 31a is integrally formed to prevent the slide switch 31 from dropping out of the opening 31, and when the slide switch 31 is slid in the direction of the arrow in FIG. 1B, the + electrode 25a and the L electrode 28 are short-circuited. It is to let.
[0028]
That is, as described with reference to FIG. 6, the sensor 21 is in a state where the L electrode 28 and the + electrode 25a are in a short-circuit state, and when the light receiving unit 24b receives light from the O terminal 27 (a state in which no detection target is detected). An output signal from the off state to the on state is output.
[0029]
As described above, even after the sensor 21 is mounted, the form of the output signals of the two systems can be easily switched from a single terminal. In addition, both the sensor that does not need to be switched and the sensor 21 of the present invention can be formed with three terminals, so that the production and product management can be unified.
[0030]
Next, FIG. 2 shows a configuration diagram of another embodiment of the first embodiment. FIG. 2 shows the sensor 21 shown in FIG. 1, in which the lower part including the opening 30 of the main body 22 is made slender to form a stepped portion 22a, and the detachable detachable switching part in which a short-circuit plate 32a is formed in the opening 30. The resin pin 32 is inserted. In this case, the fixture 33 of the frame is fitted to the step 22a so that the pins 32 do not fall off.
[0031]
That is, the pin 32 is inserted into the opening 30 when the + electrode 25a and the L electrode 28 are short-circuited, and the pin 32 is not inserted when separated.
[0032]
Next, FIG. 3 shows a configuration diagram of a second embodiment of the present invention. Figure 3 is a perspective view showing a connector 41 for a conventional sensor 11 _A (FIG. 4). In FIG. 3, a connector 41 is formed with fitting portions 43 a to 43 d for fitting the terminal groups 15 of the sensor 11 </ b> _{A on} a resin base 42, and the terminal group 15 fitted and inserted into the base 42. The connection terminals 44a to 44d that are in contact with each other are formed.
[0033]
Among the connection terminals 44a to 44d, the + connection terminal 44a, the − connection terminal 44b, and the O connection terminal 44c are respectively provided outside the base 42, and include a + external terminal 45a, a − external terminal 45b, and an O external terminal 45c. The external terminal portion 45 extends.
[0034]
The base 42 has an opening 46 through which the + connection terminal 44a and the L connection terminal 44d are exposed. A short-circuit plate (not shown in the figure) is formed in the opening 46, and a resin slide switch 47 is provided as switching means in which an engaging portion 47a for preventing falling off is formed.
[0035]
That is, by shorting + connection terminal 44a and the L connecting terminal 44d by sliding the slide switch 47, the sensor 11 by short-circuiting the positive terminal and the L terminal of the terminal group 15 of the _A similarly to the description of FIG. 1, The output signal from the single O external terminal 45c is switched and output.
[0036]
That is, by using the connector 41 of the present invention, a conventional sensor can be used.
[0037]
FIG. 3 shows a case in which the switching means is formed by the slide switch 47, but pins (including fixtures) can be used as in FIG.
[0038]
In the above-described embodiment, the transmission type photo sensor has been described, but a reflection type photo sensor may be used.
[0039]
Further, in the above-described embodiment, the sensor is described as a photo sensor. However, the present invention is not limited to this, and can be applied to all sensors that need to switch output signals.
[0040]
【The invention's effect】
As described above, according to the present invention, two output signals having different states are switched by the switching unit according to the detection state of the detection unit, and one of the detection signals is output from a single terminal of the terminal unit. This makes it possible to unify products, prevent erroneous wiring, and improve the convenience of output switching.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a first embodiment of the present invention.
FIG. 2 is a configuration diagram of another embodiment of the first embodiment.
FIG. 3 is a configuration diagram of a second embodiment of the present invention.
FIG. 4 is a perspective view of a conventional transmission type photosensor.
FIG. 5 is a perspective view of a conventional reflective photosensor.
FIG. 6 is an explanatory diagram of an output form of a conventional photosensor.
[Explanation of symbols]
Reference Signs List 21 Sensor 22 Main body 24a Light emitting unit 24b Light receiving unit 25 + terminal 25a + electrode 26 -terminal 26a -electrode 27a O electrode 27 O terminal 28 L electrode 29 terminal unit 30 opening 31 slide switch 32 pin 32a short circuit plate 33 fixture 41 connector 42 Base portions 43a to 43d Fitting portion 44a + connection terminal 44b-connection terminal 44c O connection terminal 44d L connection terminal 45 external terminal portion 45a + external terminal 45b-external terminal 45c O connection terminal 46 opening 47 slide switch

Claims (3)

A detection unit (24a, 24b) for detecting a detection target;
A switching unit (31, 32) for switching between two types of output signals different in a mode of outputting at the time of detection and a mode of outputting at the time of non-detection according to the detection state of the detection target in the detection units (24a, 24b);
A terminal section (29) including a single terminal (27) for outputting the two output signals switched by the switching sections (31, 32);
The switching section (31, 32) has two electrodes (25a, 28) corresponding to the two output signals, and a slidable switch (25, 28) for separating and short-circuiting the two electrodes (25a, 28). 31) or a sensor having a detachable pin (32) . A detection unit (14a, 14b) for detecting an object to be detected is provided, and includes a single terminal for outputting two systems of output signals having different states according to the detection state of the object to be detected. A connector interposed by mounting the sensors (11A, 11B) between a sensor (11A, 11B) provided with a terminal group (15) and a substrate for mounting the sensors (11A, 11B). At
A fitting portion (43a-43d) for fitting the terminal group (15) of the sensor (11A, 11B) and contacting the corresponding connection terminal (44a-44d);
And the sensor (11A, 11B) switching means for switching the output signal of the two systems the output Ri by a single pin (47),
An external terminal group (45) including a single external terminal (45c) for outputting the two output signals switched by the switching means (47);
A connector comprising: The switching means (47) has a slidable switch (47) or a detachable pin for separating and short-circuiting the connection terminals (44a, 44d) among the connection terminals (44a to 44d). 2 Symbol placement of the connector section.

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