JP3004469U - Plug connection device - Google Patents

Abstract

(57) [Abstract] [Purpose] It is determined whether the connection plug connected by only connecting the connection plug is a three-terminal connection plug or a two-terminal connection plug. [Structure] A first connection terminal 11 is connected to the ground among three connection terminals provided in a connection jack, and a second connection terminal 12 is connected to a power supply via a resistor R1. Further, the third connection terminal 13 is connected to the power supply via the resistor R2. The potential of the second connection terminal 12 is determined by the first determination means, and the potential of the third connection terminal 13 is determined by the second determination means. Depending on the result of the determination by the first determining means and the second determining means, a three-terminal connecting plug is connected to this connecting jack or a two-terminal connecting plug is connected. Or if these plugs are not connected and are in an empty state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a plug connecting device for discriminating the type of a connection plug, for example, when a connection plug of an operator for an electronic musical instrument is inserted into a connection jack provided in an electronic musical instrument.

[0002]

[Prior art]

 In the recent electronic musical instruments, various musical performance controls are performed by electronic musical instrument operators. The operator and the electronic musical instrument body may be connected by a plug-jack method.In that case, the plug at the end of the cable extending from the operator is connected to the jack of the plug connection device provided in the electronic instrument body. Plugged in and connected. In addition, the operators can be roughly classified into two types, a switch type with a two-terminal connection plug and a volume type with a three-terminal plug, and a plug connection device that can connect both types is known. Has been. The switch type operator has a two-terminal switch built in. When the operator is operated, the switch is turned on and off, and a signal is output from the operator in response to this on / off. Is input via the plug connection device, and for example, the start and stop of automatic performance are controlled. On the other hand, the volume type operator has a built-in three-terminal volume, and the volume value changes continuously by operating the operator, and a signal with a value corresponding to this volume value is produced by the operator. This signal is output via the plug connection device, and the tempo of the performance, for example, is continuously controlled.

The above-mentioned plug connection device capable of connecting both types of connection flags is compatible with both the switch type and the volume type, and thus is convenient and easy to use. Examples of plug connecting devices to which both types of connecting plugs can be connected are proposed in Japanese Utility Model Publication No. 5-24959 and Japanese Patent Application Laid-Open No. 5-333853.

[0004]

However, in the technique proposed in Japanese Utility Model Publication No. 5-24959, an on / off signal is generated when a two-terminal connection plug for a switch type is connected, In addition, a switch circuit is required to generate a continuously variable signal when a volume type three-terminal connection plug is connected, which causes a problem of cost increase. Further, there is no means for determining which one of the two-terminal connection plug and the three-terminal connection plug is in the connected state. Therefore, the connected connection plug is the two-terminal connection plug. The user needs to set whether the connection plug is a connection plug or a three-terminal connection plug, which is complicated and time-consuming.

Further, the technique proposed in Japanese Patent Laid-Open No. 5-333853 includes means for determining whether the connected connection plug is a two-terminal connection plug or a three-terminal connection plug. It is not possible to determine by just inserting the plug into the jack. To make the determination, the connected connection plug must be a 2-terminal connection plug or 3 This is a problem because it is necessary to determine the connection plug of the terminal, which requires an operation for the determination.

In view of the above circumstances, an object of the present invention is to provide a plug connecting device capable of discriminating the type of the connected connection plug only by the operation of connecting the connection plug.

[0007]

[Means for Solving the Problems]

 The plug connecting device of the present invention which achieves the above object is provided with first, second and third connecting terminals to which both the first connecting plug of three terminals and the second connecting plug of two terminals can be connected. When the first connection plug is connected, each of the three terminals of the first connection plug is connected to each of the first, second and third connection terminals. At the same time, when the second connection plug is connected, each of the two terminals of the second connection plug has both the first connection terminal and the second connection terminal, and the third connection. In a plug connecting device having connection jacks respectively connected to terminals, for determining whether the connection plug connected to the connection jack is the first connection plug or the second connection plug The first connection terminal is connected to a first potential, the second connection terminal is connected to a second potential via a first resistor, and the third connection terminal is connected to a second resistor. Is connected to a third potential including the same potential as the second potential, and the potential of the second connection terminal is on the first potential side or the second potential. Of the third connection terminal, and whether the potential of the third connection terminal is at the potential of the third potential or the third potential and the first potential. And a second determination means for determining which one of the potentials on the side of the first potential and the potential on the side of the first potential, the determination result by the first determination means and the above According to the result of the determination by the second determining means, the first connecting plug is attached to the connecting jack. The connection jack is in the first state, or the connection jack is in the second state where the second connection plug is connected, or the connection jack is also in the first connection plug. It is characterized in that it is equipped with a three-state judging means for judging whether or not the second connecting plug is not connected and is in a vacant state.

Here, in the plug connecting device of the present invention, instead of the three-state determining means, the electric potential of the second connecting terminal is on the electric potential of the first electric potential side or the electric potential of the second electric potential side. A first two-state determining means for determining whether the second state or the one of the first state and the empty state is present depending on whether the potential is on the potential side. You may prepare.

In the plug connection device of the present invention, instead of the three-state determination means, the potential of the third connection terminal is at the potential on the third potential side or the third potential. Depending on whether the potential is between the first potential and the first potential or the potential on the first potential side, either of the second state and the empty state. A second two-state determining means for determining whether the vehicle is in the state or the first state may be provided.

Typically, the connection jack has an opening for inserting a connection plug, and the first, second and third connection terminals are arranged in the order of the first, second and third connection terminals. , Provided at a position away from the above-mentioned opening. The first potential is typically a ground potential, and the second potential 3 and the third potential are typically both power supply potentials.

[0011]

[Action]

 Here, for ease of understanding, the first potential will be described as a ground potential, and both the second potential and the third potential will be described as power source potentials. In the plug connection device of the present invention, the first determination means determines whether the potential of the second connection terminal is at the ground potential or the power supply potential. When a 2-terminal connection plug (second connection plug according to the present invention) is connected to the connection jack, the second connection terminal of the connection jack is short-circuited with the first connection terminal connected to the ground. As a result, the second connection terminal also becomes the ground potential. It is determined by the first determining means that the second connection terminal is at the ground potential, and thus it is determined that the two-terminal connection plug is connected to the connection jack.

However, when the potential of the second connection terminal is determined to be the power supply potential by the first determination means, the connection jack is in an empty state or the three-terminal connection plug (referred to in the invention). It cannot be determined whether the first connection plug) is in the connected first state. On the other hand, the second determination means determines whether the potential of the third connection terminal provided in the connection jack is the power source potential, or the intermediate potential between the power source potential and the ground potential or the ground potential. .

When the connection jack is in an empty state or in a second state in which a two-terminal connection plug is connected to the connection jack, the third connection terminal is connected via the second resistor. Being connected to the power supply, the third connection terminal is at the power supply potential. On the other hand, when the three-terminal connection plug is connected, the third connection terminal becomes an intermediate potential or ground potential due to resistance division. Therefore, the second determination means determines whether it is in the empty state or in the second state in which the connection plug of two terminals is connected or in the first state in which the connection plug of three terminals is connected. .

Since the three-state judging means according to the present invention includes both the first judging means and the second judging means, it is possible to determine the connection jack from the above two judging results without any special operation by the user. Whether the two-terminal connection plug is in the second connected state, or the three-terminal connection plug is in the first connected state, or the connection jack is empty. Three states are automatically determined.

By the way, whether or not the connection plug is connected to the connection jack can be seen at a glance. Therefore, it may be up to the user to determine whether the connection plug is connected to the connection jack. In this case, by providing the first two-state determining means corresponding to only the first determining means or the second two-state determining means corresponding to only the second determining means, the connection plug is connected to the connection jack. If it is known that the connection jack is connected, it is automatically determined whether the connection jack has a three-terminal connection plug or a two-terminal connection plug.

[0016]

【Example】

 Embodiments of the present invention will be described below. FIG. 1 is a circuit diagram of a plug connecting device according to an embodiment of the present invention. The connection jack 10 shown in FIG. 1 has a first connection terminal 11 connected to the ground potential, a second connection terminal 12 connected to a power supply via a resistor R1, and a power supply also connected via a resistor R2. And a third connection terminal 13 connected to the. The power source connected via the resistor R1 and the power source connected via the resistor R2 need not be the same, but are preferably the same in order to simplify the power source system. In the embodiments, the same power source will be described.

The second connection terminal 12 is connected to the input port 2 of the CPU 15 via the resistor R5 and the buffer 14c. On the other hand, the third connection terminal 13 is connected to the A / D port of the CPU 15 via the resistor R3 and the buffer 14a. Further, the third connection terminal 13 is also connected to the input port 1 of the CPU 15 via the resistor R4 and the buffer 14b. Here, the resistors R3, R4, R5 are inserted to protect the buffers 14a, 14b, 14c from external noise, and the values of these resistors R3, R4, R5 are, for example, about 100Ω.

FIG. 2 is a diagram in which the volume-type three-terminal connection plug 20 is connected to the volume VR provided in the operator. The three-terminal connection plug 20 includes a base terminal 21 connected to one end of the volume VR, an intermediate terminal 22 connected to the other end of the volume VR, and a tip terminal 23 connected to a slider of the volume VR. It consists of The base terminal 21, the intermediate terminal 22, and the tip terminal 23 are electrically insulated from each other. When the three-terminal connection plug 20 is connected to the connection jack 10 shown in FIG. 1, the base terminal 21 has the first connection terminal 11, the intermediate terminal 22 has the second connection terminal 12, and the front end has the second connection terminal 12. The third connection terminals 13 are connected to the terminals 23, respectively.

FIG. 3 is an equivalent circuit diagram when the three-terminal connection plug 20 is connected to the connection jack 10. Here, the input port 2 has an intermediate potential by being resistance-divided by the resistor R1 and the volume VR, but since the value of the volume VR is set larger than the value of the resistor R1, the input port 2 A logic "1" (the same logic as the power supply potential) is input as the input data. On the other hand, when the manipulator is operated and the position of the slider of the volume VR changes, a voltage corresponding to the position of the slider is input to the A / D port. Even if the slider of the volume VR moves to the upper portion of FIG. 3, this voltage has a voltage lower than the power supply voltage because it is resistance-divided by the resistor R1 and the volume VR. Therefore, even if this voltage is calculated as the A / D value, the A / D value is smaller than the A / D value corresponding to the power supply voltage. Further, when the slider of the volume VR moves to the lower part of FIG. 3, the A / D port becomes the ground potential. Therefore, when the three-terminal connection plug 20 for the volume type is connected to the connection jack 10, the data of the input port 2 becomes logic "1" and the voltage of A / D input to the A / D port is A / D. The D value is an A / D value smaller than the A / D value corresponding to the power supply voltage. The performance of the electronic musical instrument is controlled by this A / D value.

FIG. 4 is a diagram in which the switch-type two-terminal connection plug 40 is connected to the switch SW provided in the operator. The two-terminal connection plug 40 is composed of a base terminal 41 connected to one end of the switch SW and a tip terminal 43 connected to the other end of the switch SW. Moreover, the base terminal 41 and the tip terminal 43 are electrically insulated from each other.

When the two-terminal connection plug 40 is connected to the connection jack 10 shown in FIG. 1, the base terminal 41 has both the first connection terminal 11 and the second connection terminal 12 and the front terminal 43. The third connection terminals 13 are in contact with each other. FIG. 5 is an equivalent circuit diagram when the two-terminal connection plug 40 is connected to the connection jack 10.

The first connection terminal 11 of the connection jack 10 is connected to the ground as shown in FIG. 1, and the second connection terminal 12 is connected to the base terminal 41 of the two-terminal connection plug 40 so that Since it is connected to the connection terminal 11 of No. 1, the input port 2 is input with logic “0” (logic indicating that it is at the ground potential). Here, when the switch SW is not operated (the switch SW is open), the power supply voltage is applied to the input port 1 through the resistor R2. 'Is entered. On the other hand, when the switch SW is closed by operating the switch SW, the logic '0' is input to the input port 1. This on / off controls the performance of the electronic musical instrument.

Next, a description will be given of an empty state in which neither the volume-type three-terminal connection plug 20 nor the switch-type two-terminal connection plug 40 is connected to the connection jack 10. In the empty state, the power supply voltage is applied to the input port 2 through the resistor R1 as shown in FIG. 1, so that the logic '1' is input to the input port 2. The power supply voltage is also applied to the A / D port via the resistor R2. This power supply voltage is higher than the voltage when the volume VR slider is moved to the upper part of FIG. The A / D value of the voltage input to the D port is the A / D value of the power supply voltage.

FIG. 6 is a flowchart of a timer interrupt routine for determining the plug connection state, which is repeatedly activated at predetermined time intervals. In this routine, the connection jack is in the state in which the above-mentioned three-terminal connection plug 20 for volume type is connected or in the state in which the two-terminal connection plug 40 for switch type is connected. It is determined whether there is a free state or a free state.

When the routine shown in FIG. 6 is started, first, in step S1, it is determined whether or not the data of the input port 2 is logic '1'. If it is determined that the data of the input port 2 is logic '1', the process proceeds to step S2. On the other hand, if the data of the input port 2 is determined to be logic '0', it means that the connection plug 40 having two terminals for the switch type is connected, and the process proceeds to step S5. The switch process associated with the terminal connection plug 40 is executed, and this routine ends.

In step S2, it is determined whether the A / D value corresponding to the voltage input to the A / D port is the maximum value MAX, that is, the A / D value corresponding to the power supply voltage. As a result of comparing the A / D value corresponding to the voltage input to the A / D port and the maximum value MAX, the A / D value corresponding to the voltage input to the A / D port and the maximum value MAX. If it is determined that the two are not equal, it means that the volume-type three-terminal connection plug 20 is connected, and the process proceeds to step S3, in which the volume processing associated with the three-terminal connection plug 40 is performed. Execute and this routine ends.

On the other hand, in step S2, the A / D value corresponding to the voltage input to the A / D port is compared with the maximum value MAX, and as a result, the A / D value corresponding to the voltage input to the A / D port is compared. If it is determined that the / D value and the maximum value MAX are equal to each other, it means that there is an empty state, and nothing is executed (no processing; step S4), and this routine is ended.

In this way, by detecting the data of the input port 2 and the A / D value corresponding to the voltage input to the A / D port, the connection jack 10 has a three-terminal connection plug. Is automatically connected, the two-terminal connection plug is connected, or it is in an empty state where nothing is connected continuously. By the way, it is clear at a glance whether or not the three-terminal connection plug 20 for the volume type and the two-terminal connection plug 40 for the switch type are connected to the connection jack 10. It is not always necessary to determine whether the connection plug of is in the connected state or in the empty state. Therefore, step S2 may be omitted in the flowchart shown in FIG. In this case, the flow of the timer interrupt routine is simplified and the judgment time is shortened.

FIG. 7 is a flowchart of a timer interrupt routine that is repeatedly executed at predetermined time intervals and that is executed instead of the routine shown in FIG. Comparing the flowchart shown in FIG. 7 and the flowchart shown in FIG. 6, in the flowchart shown in FIG. 7, step S1 shown in FIG. 6 is omitted and only the determination corresponding to step S2 is performed. This simplifies the flow and shortens the determination time.

As described above, when it is known that the connection plug is connected to the connection jack, it is not always necessary to determine that it is in an empty state. Good. As the connection jack 10, there is a so-called stereo jack which is generally commercially available. The stereo jack is provided with a first connection terminal 11, a second connection terminal 12, and a third connection terminal 13 in this order at positions apart from an opening for inserting a connection plug. The plug connecting device of the present embodiment uses such a connecting jack 10, and the stereo jack is widely used, so that the cost is reduced and the stereo plug which is generally used is also used. Or you can use the mono plug as it is.

[0031]

[Effect of device]

 As described above, when the plug connection device of the present invention is provided with the three-state determination means including the first determination means and the second determination means, the connection jack has a three-terminal connection plug for volume type. It is automatically determined whether it is in the connected state, the two-terminal connection plug for the switch type is in the connected state, or in the empty state. Therefore, there is no need for the user to set the type according to the type of the connected connection plug, nor for the user to operate the control element to determine the type of the connected connection plug. , Operability is improved.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a plug connecting device according to an embodiment of the present invention.

[Fig. 2] Three-terminal connection plug for volume type
It is the figure connected with the volume provided in the operator.

FIG. 3 is an equivalent circuit diagram when a three-terminal connection plug is connected to a connection jack.

FIG. 4 is a diagram in which a switch-type two-terminal connection plug is connected to a switch provided in an operator.

FIG. 5 is an equivalent circuit diagram when a two-terminal connection plug is connected to a connection jack.

FIG. 6 is a flowchart of a timer interrupt routine for determining a plug connection state, which is repeatedly activated at predetermined time intervals.

FIG. 7 is a flowchart of a timer interrupt routine that is repeatedly activated at predetermined time intervals instead of the routine shown in FIG.

[Explanation of symbols]

 10 Connection Jack 11 1st Connection Terminal 12 2nd Connection Terminal 13 3rd Connection Terminal 14a, 14b, 14c Buffer 15 CPU 20 3 Terminal Connection Plug 40 2 Terminal Connection Plug 21, 41 Base Terminal 22 Intermediate Terminal 23 , 43 Tip terminals R1, R2, R3, R4, R5 Resistance VR volume SW switch

Claims (5)

[Scope of utility model registration request] 1. A connection jack having first, second and third connection terminals, to which both a first connection plug of three terminals and a second connection plug of two terminals can be connected, When the first connection plug is connected, each of the three terminals of the first connection plug is connected to each of the first, second and third connection terminals,
When the second connection plug is connected, each of the two terminals of the second connection plug has both the first connection terminal and the second connection terminal, and the third connection terminal. Equipped with a connection jack that is connected to
In a plug connecting device which determines whether the connection plug connected to the connection jack is the first connection plug or the second connection plug, the first connection terminal is at a first potential. Connected, said second
Connection terminal is connected to a second potential via a first resistance, and the third connection terminal is connected to the second potential via a second resistance.
Is connected to a third electric potential including the same electric potential as the electric potential of the second electric potential, and the electric potential of the second connection terminal is the electric potential of the first electric potential side or the electric potential of the second electric potential side. First determining means for determining whether the potential is at the potential, and whether the potential of the third connection terminal is at the potential on the side of the third potential, or between the third potential and the first potential. And a second determination means for determining which one of the first potential side potential and the first potential side potential is present, the determination result by the first determination means and the second determination means. According to the determination result according to, the connection jack is in the first state in which the first connection plug is connected, or the connection jack is in the second state in which the second connection plug is connected. Or the first connection plug to the connection jack. A plug connection device comprising three-state determination means for determining whether or not the plug and the second connection plug are not connected. 2. Instead of the three-state determination means, depending on whether the potential of the second connection terminal is at the potential on the side of the first potential or the potential on the side of the second potential. , A first two-state determining means for determining whether the second state or the one of the first state and the empty state is provided. The described plug connecting device. 3. Instead of the three-state determination means, the potential of the third connection terminal is at the potential on the side of the third potential, or between the third potential and the first potential. It is in one of the second state and the empty state, or in the first state, depending on which of the intermediate potential and the potential on the first potential side is present. 2. The plug connecting device according to claim 1, further comprising a second two-state determining unit that determines whether the plug connecting device is in the above state. 4. The connection jack has an opening for inserting a connection plug, and the first, second and third connection terminals include:
The plug connection device according to claim 1, wherein the first, second, and third connection terminals are provided in this order at positions apart from the opening. 5. The first potential is a ground potential, and both of the second potential and the third potential are power supply potentials. The described plug connecting device.