JPH02204925A - Radio switch - Google Patents

Abstract

PURPOSE:To provide a radio switch which performs stable transmission free from output obstruction, by taking out a oscillation output part from a switch case, and installing outside the case. CONSTITUTION:A limit switch includes a switch case body 12, which holds an actuator 11 sensitive for external force and a built-in switch to be turned on/off in linkage with motion of the actuator 11, and an oscillation output device 13 mating therewith. This oscillation output device 13 is installed dividedly apart from the switch case bodies 12, 12 positioned upright on a moving processing table 14 retreated from the installation position of the switch case bodies 12, 12. With this oscillation output device 13, cables 19, 19 are connected so as to admit a switch signal from the upper and lower switch case bodies 12, 12, and are equipped with an oscillation output function corresponding to the upper and lower switch case bodies 12, 12.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a wireless switch such as one used in a limit switch, and more specifically to a wireless switch that can reliably avoid external influences during oscillation output. Regarding switches.

(b) Conventional technology Generally used limit switches, for example,
As shown in the figure, a vertical limit switch 33 facing the upper and lower limit positions of the vertical slider 32 installed on the movable processing table 31 of the equipment
．． 34 are installed opposite each other. The processing table 3 is connected between these limit switches 33 and 34 and the switch control section 35.
The cables 36 and 36 are connected to each other by allowing for a movement length of 1.

However, this type of cable 36.36
1 repeats the bending action each time it moves, and fatigue may be concentrated particularly on the fixed portions 37 of the cable connection ends, resulting in wire breakage.

Therefore, a wireless switch is provided that includes a switch section that detects the movement of the actuator, and an oscillation output section that wirelessly outputs oscillation at a predetermined frequency to a remote location based on the detection signal of the switch section. For example, JP-A-63
-195921 publication, Jitsuma@56-61847 publication).

However, this type of wireless switch has a built-in switch, various circuits for oscillation output control, and a battery inside the switch case, so there are limits to how small the switch can be made, and the battery size is limited. In addition, when replacing the battery, the switch case is often close to the machined part of the equipment or located between the parts of the equipment, which makes it difficult to replace the battery. The workability of circuit replacement is poor, and in particular, the oscillation output section has a problem in that the oscillated output tends to change due to the atmospheric location where the output wave is easily disturbed by the equipment processing section.

(c) Problems to be solved by the invention The purpose of the invention is to provide a wireless switch that can perform stable transmission without output disturbance by taking out the oscillation output section from the switch case and installing it outside the case. shall be.

(d) Means for Solving the Problems This invention provides a switch section that performs switching operation in conjunction with the movement of an actuator that tilts in response to external force, and a switch signal that is set to a predetermined frequency based on the output signal of this switch section. This wireless switch is equipped with an oscillation output section that wirelessly outputs oscillation to a remote location, and the oscillation output section is installed separately in a switch case that houses the switch section and a separate location.

(E) Effect of the Invention According to this invention, when the actuator tilts due to external force, the switch section inside the switch case detects this movement, and the detected switch signal is transmitted to the oscillation output section located away from the switch case. The oscillation is output to the receiver side.

(f) Effects of the invention Therefore, the output signal output from the oscillation output section is not affected by the adverse effects of the equipment processing section, and is output stably, resulting in high output performance with excellent noise resistance, and reliability that efficiently increases transmitting and receiving sensitivity. This makes it a highly stable wireless switch.

In addition, since the oscillation output section is installed separately outside the switch case, the switch case can be made smaller, and the battery for the oscillation output section is also located outside the switch case, so it can be equipped with a large-capacity battery. can do. Furthermore, when the oscillation circuit section is replaced when the battery runs out, a circuit failure occurs, or the frequency output is changed, the oscillation circuit section can be efficiently replaced regardless of the switch case section.

(g) Examples An embodiment of the present invention will be described in detail below based on the drawings.

The drawing shows a wirelessly operated limit switch, and in FIG. 1, this limit switch includes an actuator 11 for sensing an external force and a switch case body 12 that holds a built-in switch (not shown) that performs a switching operation in conjunction with the movement of the actuator 11. and a corresponding oscillation output device 13.

The above-mentioned switch case body 12 is provided with an elevating slider 16 that is attached to a slide rail 15 erected on a movable processing table 14 of the equipment so as to allow it to rise and fall, and the upper limit of the opposing detection end 17 of the elevating slider 16 The upper and lower switch case bodies 12.12 facing the lower limit position are fixed to and opposed to the upper and lower positions of the support column 18 erected on the movable processing table 14.

Further, these switch case bodies 12.12 and an oscillation output device 13, which will be described later, are connected via cables 19.19.

The above-mentioned oscillation output device 13 is connected to the switch case main body 12.
12 is installed upright on a movable processing table 14 that is set back from the position and separated from the switch case bodies 12, 12, and this oscillation output device 13 has switches from the upper and lower switch case bodies 12, 12 Each cable 19.degree. 19 is connected to allow signal input, and the upper and lower switch case bodies 12.degree. 12 have a corresponding oscillation output function.

In this case, by installing the oscillation output device 13 away from the back side of the switch case body 12.12, which corresponds to the external influence avoidance position away from the machining part that causes the output failure, the oscillation output device 13 The output performance is reliably improved and stable transmission is performed.

As shown in FIG. 2, this oscillation output device 13 includes a relatively large-capacity battery 20 and an oscillation circuit section 21 such as an oscillation circuit and a modulation circuit. modulates the built-in switch signal from the switch case main body 12.
The signal is output wirelessly to the switch control unit 23 located at a remote location.

In the limit switch configured in this way, when the actuator 11 of the switch case body 12 tilts due to external force, the built-in switch outputs an ON signal in conjunction with the movement, and based on this ON signal, the switch case body The oscillation output device 13 in the retracted position apart from the oscillation output device 12 wirelessly outputs oscillation to the switch control unit 23 on the receiving side.

At this time, the output signal output from the oscillation output device 13 is sufficiently far away from the equipment processing section, and is not affected by radio wave interference from this equipment processing section, and can be output stably, thus achieving noise resistance. This makes it a highly reliable wireless switch that can efficiently improve transmitting and receiving sensitivity.

In addition, the oscillation output device 13 is connected to the switch case body 12.1.
Since the switch case body 12 and 12 are installed separately outside the switch case body 12 and 12, the oscillation output device 13 can be made smaller.
Since the battery 20 can also be located outside the switch case body, a large capacity battery can be installed.

Furthermore, when replacing the oscillation circuit section 21 when the battery runs out, a circuit failure occurs, or when the frequency output is changed, the replacement can be done efficiently regardless of the switch case main body side, which is likely to be installed in a narrow space.

In the correspondence between this invention and the configuration of the embodiment described above, the switch case of this invention corresponds to the switch case main body 12.12 of the embodiment, and similarly, the oscillation output section is
Although the present invention corresponds to the oscillation output device 13, it is not limited to the configuration of the above-described embodiment.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, FIG. 1 is a schematic side view showing how the limit switch is used, FIG. 2 is a longitudinal sectional front view of the oscillation output device, and FIG. 3 shows how the conventional limit switch is used. FIG. 11...Actuator 12...Switch case body 13...Oscillation output device 23...Switch control section\23

Claims (1)

[Claims] (1) A switch unit that performs switching in conjunction with the movement of an actuator that tilts in response to external force, and an oscillation output that wirelessly oscillates a switch signal at a predetermined frequency to a remote location based on the output signal of this switch unit. What is claimed is: 1. A wireless switch comprising: a wireless switch comprising: a switch case;