JPH0443518A - Multi-contact sliding type switch - 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 [Industrial Application Field] The present invention relates to the operation of a switch having multiple contacts, and particularly to prevention of poor contact therein.

[Prior Art] A rotary switch is a switch that has multiple contacts and selects a connection state by sliding each contact. Figure 2 shows the overall configuration of this rotary switch. Fixed terminals 2 are arranged circumferentially on the switch body 1. In the center of the fixed terminal 2 located circumferentially,
A conductive disk 6 is provided as a sliding contact. The conduction disk 6 has a contactor 6T and rotates around a central axis 90. The connection state between the contactor 6T and each fixed terminal 2 changes with this rotation.

Among the terminals arranged circumferentially, the main fixed terminal 2M is always in contact with the conductive disk 6 regardless of the rotation of the conductive disk 6. That is, by rotating the conduction disk 6, each of the other fixed terminals 2 to be connected to the main fixed terminal 2M can be selected. The main fixed terminal 2M and other fixed terminals 2 are protruding terminals 2L that protrude from the switch body 1.
are connected to each. Therefore, by wiring predetermined lead wires to each of the protruding terminals 2L, electrical switching can be performed based on the switch mechanism shown in FIG. 2.

The motor 4 is a drive device that rotates the conduction disk 6, and this motor 4 is controlled by a microcomputer 8 as a control device.
controlled by. Further, the position detection device 5 is a device for detecting which fixed terminal 2 the contactor 6T is in contact with.

[Problems to be Solved by the Invention] However, the above conventional multi-contact sliding switch has the following problems. Oxidation may occur or dirt may adhere to the surface of each fixed terminal 2 of the rotary switch. In such a case, even if the switch is switched to bring the contactor 6T into contact, conduction will not be sufficient due to oxidation, dirt, etc. adhering to this contact surface. If the contact surfaces are insufficiently conductive, the switch must be disassembled and repaired, which wastes time and money.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a multi-contact sliding switch that does not cause insufficient conduction.

[Means for Solving the Problems] A multi-contact sliding type switch according to claim 1 comprises: a plurality of fixed terminals arranged in a row; a sliding contactor that slides to come into contact with each fixed terminal; A driving means for operating the movable contact; a position detecting means for detecting which terminal the sliding contact is in contact with and outputting a position signal; and a specifying means for outputting a designation signal for designating one of the fixed terminals. , direction indicating means for taking in the position signal and the designation signal and outputting a direction signal indicating the direction in which the sliding contact should move; a first comparing means that outputs an upper signal when the position of the fixed terminal specified by the specified signal matches; an operation stopping means that activates or stops driving the driving means based on the specified signal or the matching signal; In a multi-contact sliding type switch equipped with A second comparison means outputs a contact signal and outputs a second contact signal when the sliding contact is positioned on a fixed terminal adjacent to the designated fixed terminal in a second direction. When the direction indicating means receives the first contact signal or the second contact signal, the direction indicating means outputs a direction signal to move the sliding contact in the direction toward the designated fixed terminal, and the first comparing means The apparatus is characterized in that it is equipped with a counting means that receives a coincidence signal from the apparatus and outputs a count signal when the coincidence signal is received a predetermined number of times, and that the operation stop means stops driving the drive device based on the count signal.

A multi-contact sliding type switch according to a second aspect of the invention is characterized in that, in the multi-contact sliding type switch of the first aspect, the terminals in a row are arranged to form a circumference.

A multi-contact sliding switch according to claim 3 comprises: a plurality of fixed terminals arranged in a row; a sliding contact that slides to come into contact with each fixed terminal; a drive means for actuating the sliding contact; a position detection means for detecting which terminal the sliding contact is in contact with and outputting a position signal; a designation means for outputting a designation signal for designating one of the fixed terminals; controlling the drive of the drive means; A multi-contact sliding type switch comprising: a control means for controlling the driving means so that the current position of the sliding contact indicated by the position signal matches the position of the fixed terminal designated by the designated signal; is characterized in that it slides past the fixed terminal specified by the specified signal at least once, and then comes into contact with the specified fixed terminal and stops.

[Function] The multi-contact sliding type switch according to claim 1 receives a designation signal and a position signal, and determines whether a sliding contact is located on a fixed terminal adjacent to a designated fixed terminal in a first direction. When the second comparison means outputs the first touch signal. or,
The second comparison means outputs a second contact signal when the sliding contact is positioned on a fixed terminal adjacent to the designated fixed terminal in the second direction.

When the direction indicating means receives the first contact signal or the second contact signal, it outputs a direction signal to move the sliding contact in the direction toward the designated fixed terminal.

Therefore, when the designating means outputs a designation signal designating one fixed terminal, the sliding contact slides on the fixed terminal a predetermined number of times. After that, the sliding contact comes into contact with the fixed terminal and stops.

In the multi-contact sliding switch according to the second aspect of the present invention, the terminals in a row are arranged to form a circumference.

Therefore, by rotationally moving the sliding contact on the circumference where the fixed terminal is arranged, the specifying means can reach the specified fixed terminal.

In the multi-contact sliding type switch according to the third aspect of the present invention, the sliding contact or the fixed terminal designated by the designated signal is slid at least once. After that, it comes into contact with a designated fixed terminal and stops.

Therefore, before coming into contact with a designated fixed terminal and stopping, the sliding contactor slides on the fixed terminal.

[Example] An example of the present invention will be described based on the drawings. Masu, 1st
The figure shows an overall configuration diagram of the present invention. The designation means 91 outputs a designation signal that designates one of the plurality of fixed terminals arranged in a row. Based on this designation signal, the operation stop means 92 gives an operation command to the drive means 97.

The position detection means 99 detects which fixed terminal the sliding contact is in contact with and outputs a position signal. This device signal and the specified signal are taken into the direction indicating means 93, and the direction indicating means 93 determines the direction in which the sliding contact should move based on both signals, and sends a direction signal to the driving means 97. Output. Thus, the driving means 97 operates the sliding contact to move it toward the designated fixed terminal in response to the direction signal and the command from the deactivation means 92.

While the sliding contact is moving, the -th comparison means 95 takes in a position signal and compares this position signal with the designation signal from the designation means 91. Then, when the current position of the sliding contact and the specified position of the fixed terminal match, a match signal is output. The coincidence signal is given to the counting means 94, and the counting means 94 outputs a counting signal to the operation stopping means 92 when it receives this coincidence signal a predetermined number of times. Then, the operation stopping means 92 stops driving the driving means 97 based on the count signal.

On the other hand, the second comparing means 96 receives the designated signal and the position signal, and generates a first contact signal when the sliding contact is located on a fixed terminal adjacent to the designated fixed terminal in the first direction. Output. Further, a second contact signal is output when the sliding contact is located on a fixed terminal adjacent to the designated fixed terminal in the second direction. The first contact signal and the second contact signal are given to the direction indicating means 93. When the direction indicating means 93 receives the first contact signal or the second contact signal, it outputs a direction signal to move the sliding contact in the direction toward the designated fixed terminal. As described above, in the present invention, when the designation means 91 outputs a designation signal designating one fixed terminal, the sliding contact slides on the fixed terminal a predetermined number of times and then stops.

A rotary switch is a switch that has multiple contacts and selects a connection state by sliding each contact. This rotary switch will be explained using FIG. 2. In the switch body 1, a main fixed terminal 2M and a plurality of fixed terminals 2 are arranged circumferentially. The main fixed terminal 2M and other fixed terminals 2 are each connected to a protruding terminal 2L protruding from the switch body 1.

A conductive disk 6 as a sliding contact is provided at the center of the main fixed terminal 2M and the fixed terminal 2 located circumferentially. This conductive disk 6 rotates around a central axis 90. The conduction disk 6 has contacts 6T, and these six contacts are adapted to come into contact with one of the fixed terminals.

The main fixed terminal 2M is always in contact with the conductive disk 6 regardless of the rotation of the conductive disk 6. That is, by rotating the conduction disk 6, each of the other fixed terminals 2 to be connected to the main fixed terminal 2M can be selected.

In this manner, by controlling the rotation of the conductive disk 6, it is possible to change the electrical connection of each protruding terminal 2L and switch.

The conduction disk 6 is rotated by the power of the motor 4 transmitted via the reduction gear 32 . This motor 4 which is the driving means
is controlled by a microcomputer 8 as a control means.

The position detection device 5 is a device that detects the current position of the contactor 6T and outputs a position signal to the microcomputer 8.

The structure of the position detection device 5 will be explained based on FIG. 2. The position detection device 5 has a detection section 7, and the detection section 7 is provided with indicating contacts 71, 72, 73, 74, and 75. This detection section 7 is fixed to the conduction disk 6 and rotates together with the conduction disk 6. Further, the position detection device 5 has arc-shaped position detection patterns 51 and 52 as shown in the figure.
．． 53, 54 and a center detection pattern 55 are attached. Each bit of the center detection pattern 55 is located corresponding to each fixed terminal 2. Each of these patterns includes position detection contacts 71, 72, and 72 of the detection unit 7, respectively.
73, 74 and the center detection contact 75 are in contact.

When the detection part 7 rotates with the conductive disk 6, the connection state between these patterns and each detection contact also changes.

This connection state is output as a position signal from the position detection terminal 5L to the microcomputer 8.

The position signal is formed from two types of signals. In other words, the position detection contact? 1.72, 73.74 and the position detection patterns 51.52, 53.54, and a center signal indicating the connection state between the center detection contact 75 and the center detection pattern 55. The microcomputer 8 detects the current position of the detection unit 7 based on the position signal, that is, which fixed terminal 2 the contactor 6T is in contact with, and locates it at the center of the fixed terminal 2 based on the center signal. detect whether

In addition, in FIG. 2, the switch body 1 and the position detection device 5 are shown.
Although the motor 4 and the reduction gear 32 are shown separately, they are integrally attached around the central shaft 90.

Details of the microcomputer 8 are shown in FIG.

The CPU 41 controls each section according to a program stored in the ROM 42. RA on pass line 40
M43 and motor interface 44 are connected. The motor interface 44 is connected to the motor 4 as a driving means via a driver 4d. Furthermore, the pass line 40 is connected to an infrared receiver 47 through a remote control interface 45 and a position signal interface 49, respectively.
and a position sensing device 5 are connected. Further, a switching key 35 as a specifying means is connected via a switching key interface 46. Each key included in this switching key 35 corresponds to each fixed terminal 2.

Assume that a switching key corresponding to terminal P among the fixed terminals 2 is selected and pressed. The processing in this case will be explained below. A flowchart of the program stored in the ROM 42 is shown in FIG. When any of the switching keys is selected, the CPU 41 first turns mute "ON" (
Step S□). Next, the CPU 41 calculates the sliding count as rOJ.
(step S2). Then, the motor 4 is driven via the motor interface 44 (step S4), and the contact 6T of the conduction disk 6 is moved toward the terminal P.

The direction of this movement is determined by a designated signal P from the switching key 35.
and the position signal from the position sensing device. That is, the designation signal P and the position signal are taken in, the direction of the shortest distance between the current contactor 6T and the terminal P is detected, and the detected direction is given to the motor 4.

Even while the motor 4 is driving, the CPU 41 captures the position signal and detects whether the contactor 6T has passed the terminal P (step Sa). Thereafter, it is detected whether the contactor 6T has reached the terminal P+1 adjacent to the terminal P (step SS). If the terminal is located at terminal P+1, the motor 4 is rotated in the opposite direction (step S+o). That is,
After the contactor 6T slides past the designated terminal P, it starts moving in the opposite direction toward the terminal P again. In addition, mute “O”
Noise generated when the contactor 6T slides past the fixed terminal is eliminated by "N" (step S).

FIG. 5 shows a timing chart showing the position signal and the position of the contactor 6T. The position signal is formed from the position signal and the center signal. Position signal is from contact 6
The center signal is a signal indicating which fixed terminal the contact is in contact with, and the center signal indicates whether the contact is located in the center of the fixed terminal. A reversal point 200 in FIG. 5 indicates the reverse rotation of the motor 4 in step SIO.

Due to the reverse rotation of the motor 4, the contact 6T moves toward the terminal P again and slides past the terminal P (step 512).

When passing through this terminal P, the CPU 41 adds "1" to the sliding count value N and stores it (step 514). Then, the CPU 41 detects whether the contactor 6T has reached the terminal P-1 (step S, 6). Terminal P-1 is a terminal adjacent to terminal P and located in the other direction from terminal P+1 (see FIG. 5). When the contact 6T reaches the terminal P-1, the CPU 41 rotates the motor 4 in the opposite direction to move the contact 6T toward the terminal P (step S1). A reversal point 210 in FIG. 5 shows this rotation in the opposite direction.

Then, the process returns to step S6 again (step S2°).

In this way, the operations from step S6 to step sea are repeated, and when the sliding count value N reaches 3, the process proceeds to step S22 (step S2.). That is, the contactor 6T slides on the terminal P three times (see FIG. 5). After this, the CPU 41 determines whether the six contacts are connected to the terminal P based on the position signal.
It is detected whether or not the terminal P has been reached and whether it has been located at the center of the terminal P (step S22 and step 524). and,
The CPU 41 stops driving the motor 4 (step 5).
26). Finally, mute is set to 0FFJ (step S), and the process then proceeds to a predetermined steady operation (not shown).

Furthermore, Step S. The sliding count value N may be set to be more than or less than 3. Alternatively, the motor 4 may be rotated in the opposite direction when the contactor 6T is separated from the terminal P (not shown). Adjacent terminal P+1 as shown in FIG.
．． Compared to a mechanism that rotates in reverse only after reaching P-1, the time required for sliding the terminal P can be shortened.

Rotary switches are sometimes used in audio equipment and the like. In this audio equipment, it is necessary to maintain high sound quality. Therefore, if a conduction failure occurs between the contactor 6T of the audio device and the fixed terminal 2, the reliability of the product will particularly deteriorate. Therefore, the present invention is particularly effective for audio equipment.

Although the rotary switch described above has fixed terminals arranged in a circumferential manner, there are other multi-contact sliding switches, for example, in which fixed terminals are arranged in a straight line. Even when the contactor 6T is arranged in a straight line, the contactor 6T can be slid on a designated fixed terminal a predetermined number of times when switching the switch.

[Effect of the invention] The multi-contact sliding type switch according to claim 1 or claim 3 has the following features:
When the designation means outputs a designation signal designating one fixed terminal, the sliding contact slides on the fixed terminal a predetermined number of times. After that, the sliding contact comes into contact with the fixed terminal and stops.

Therefore, insufficient conductivity will not occur due to oxidation, dirt, etc. on the fixed terminals. That is, the contact surface of the fixed terminal is cleaned by the friction caused by sliding, and can be maintained in a state where conduction is possible at all times.

In the multi-contact sliding type switch according to the second aspect, the sliding contact can reach the fixed terminal specified by the specifying means by rotationally moving on the circumference where the fixed terminal is arranged.

Therefore, the moving time of the sliding contact can be shortened. That is, since the fixed terminals rotate in the direction of the shortest distance on the circumference, the moving distance can be made shorter than when the same number of fixed terminals are arranged in a straight line.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention, FIG. 2 is a diagram showing the overall configuration of a rotary switch, FIG. 3 is a diagram showing details of a microcomputer, and FIG. 4 is a diagram showing the overall configuration of a rotary switch. FIG. 5 is a diagram showing a flowchart of processing performed by the CPU of the computer. FIG. 5 is a timing chart showing the position signals and the positions of the six contacts. 2 ・ 4 ・ 5 ・ 6 ・ 6T ・ 8 ・ Fixed terminal motor position detection device Continuity disc contactor Microcomputer

Claims (2)

[Claims] (1) A plurality of fixed terminals arranged in a row, a sliding contact that slides to make contact with each fixed terminal, a driving means for operating the sliding contact, and which terminal the sliding contact contacts. a position detection means that outputs a position signal by detecting whether the fixed terminal a direction indicating means for outputting a direction signal indicating the position; and a position signal and a designated signal are taken in and compared, and when the current position of the sliding contact indicated by the position signal and the position of the fixed terminal designated by the designated signal match, a match is determined. A multi-contact sliding type switch that receives a designated signal and a position signal, and is equipped with a first comparing means for outputting a signal, and an operation stopping means for activating or stopping the drive of the driving means based on the designated signal or the matching signal. , outputs a first contact signal when the sliding contact is positioned on a fixed terminal adjacent to the specified fixed terminal in a first direction, and outputs a first contact signal when the sliding contact is located on a fixed terminal adjacent to the specified fixed terminal in a second direction. the second comparison means outputs a second contact signal when the sliding contact is positioned on the fixed terminal, and the direction indicating means receives the first contact signal or the second contact signal. outputs a direction signal to move the sliding contact in the direction toward the specified fixed terminal, receives a matching signal from the first comparison means, and outputs a count signal when the matching signal is received a predetermined number of times. A multi-contact sliding type switch, comprising a counting means for outputting an output, and an operation stopping means stopping driving of a drive device based on the counting signal. (2) The multi-contact sliding type switch according to claim 1, wherein the terminals in a row are arranged to form a circumference. (3) A plurality of fixed terminals arranged in a row, a sliding contact that slides to contact each fixed terminal, a driving means for operating the sliding contact, and which terminal the sliding contact contacts. a position detection means that outputs a position signal by detecting whether the fixed terminal In a multi-contact sliding type switch, the sliding contact is configured to control the driving means so that the current position matches the position of the fixed terminal specified by the specified signal. A multi-contact sliding type switch, characterized in that it slides and passes at least once, and then comes into contact with a designated fixed terminal and stops.