JP2007324055A - Rotary switch, rotary switch for position detection of opening/closing body closing device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary switch enabling to reduce the number of wires. <P>SOLUTION: The rotary switch 5 is used, wherein the rotary switch 5 includes contacts 6a, 6b, 6c provided on a rotation member 6 interlocking with a door and electrically connected with each other, and respective plates 7a, 7b, 7c appropriately contacting with the respective contacts in response to rotation. The contact 6c is constantly grounded through the plate 7c, the plate 7b contacting with the contact 6b when the door is half-shut is connected to an external connection terminal 5a, and the plate 7a contacting with the contact 6a when the door is fully closed is connected to the terminal 5a through a resistor R1. Because the one terminal 5a can detect three states of a high voltage, low voltage, and grounding by contacting states of the contacts, the number of signal lines can be reduced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rotary switch suitable for position detection of a movable member and a position detection rotary switch of a vehicle opening / closing body closing device.

Conventionally, as a method for detecting the position of the movable member, there has been a method in which a limit switch or a non-contact switch is arranged at a predetermined position in the moving range of the movable member, or a potentiometer is connected to the movable member. On the other hand, vehicles such as automobiles are provided with various opening / closing bodies such as doors and tailgates, and those equipped with a closing device for completely locking these opening / closing bodies and the vehicle body. is there. In some cases, such as automatic control of the opening / closing body, a rotary switch is provided when it is necessary to detect the position of the closing device (see, for example, Patent Document 1).
JP-A-9-125774

  By using the rotary switch as described above, a plurality of position detection switches can be combined into one rotary switch, which is effective for downsizing. On the other hand, when the door which is one of the opening / closing bodies of the automobile is locked by the above-described closing device, when the door is fully closed through the half-door (half-open) state at the time of the lock, in addition to the open position and the fully-closed position The half door position is also detected and controlled.

  An example in which a rotary switch is used as a door closing device will be described with reference to FIG. The door closing device may be a structure using a known striker and latch, and will be described briefly.

  As shown in FIG. 5, a striker 1 as a movable member is provided integrally with a door (not shown), and a disk-like latch 2 is rotatably supported on the vehicle body (not shown) side. ing. A radial slit 2 a and a half-door detecting recess 2 b are provided on the outer periphery of the latch 2. Further, an extended end portion 3a, which is an end portion extending in the shape of an arm of a ratchet 3 supported in a swingable manner, is brought into contact with an outer peripheral surface having an outer diameter in the disk shape of the latch 2. Yes. Note that the ratchet 3 is elastically biased by a spring (not shown) in a direction in which the extended end 3 a is pressed against the outer peripheral surface of the latch 2.

  When the door is closed, the striker 1 and the slit 2a are engaged, and in the engaged state, the latch 2 rotates in the direction of arrow B in the figure along with the movement of the door in the closing direction (movement of the striker 1). The ratchet 3 is elastically biased in the direction indicated by the arrow C in the figure by a spring means (not shown) so that the extended end 3a of the ratchet 3 falls into the half-door detecting recess 2b at the half door position. Further, in order to detect the movement of the ratchet 3 relative to the half-door detecting recess 2b and detect the half-door position, a micro switch 4 that is turned on / off by the movement of the lever portion 3b provided on the ratchet 3 is provided. In the course of the door from the half door position to the fully closed position, the extended end 3a of the ratchet 3 temporarily escapes from the half door detection recess 2b and returns to the outer peripheral surface.

  A rotary switch 5 that rotates in synchronization with the latch 2 is provided to detect the rotational movement of the latch 2 described above. In order to determine the three states of open, half-door, and full-close using the rotary switch 5, a combination of ON / OFF by two switches can be considered. In order to configure two switches with the rotary switch 5, for example, as shown in the figure, there are three contacts 6a, 6b, and 6c that are in conduction with each other provided on a rotating member 6 that rotates integrally with the latch 2, and This can be achieved by using three plates 7a, 7b and 7c made of conductive members fixed to a case (not shown) so as to contact the contacts 6a to 6c within a predetermined range. In addition, each plate 7a-7c is connected with each external connection terminal 5a * 5b * 5c connected to an external control apparatus etc. via the lead wire, respectively.

  For example, the external connection terminal 5c connected to the third plate 7c is grounded by the wire harness W3, and the first switch is formed by the first and third contacts 6a and 6c and the first and third plates 7a and 7c. The switching contact of SW1 is configured, and the switching contacts of the second switch SW2 are configured by the second and third contacts 6b and 6c and the second and third plates 7b and 7c. In the illustrated example, both the switches SW1 and SW2 are on (closed) when the door is open.

  The first external connection terminal 5a is connected to the connection terminal 8a of the control unit 8 via the connection line W1 of the wire harness, and the second external connection terminal 5b is connected to the connection terminal 8b of the control unit via the connection line W2. Has been. A CPU 9 is provided in the control unit 8, and the connection terminal 8a is connected to the first general-purpose port P1 through a known I / O circuit using the transistor Q1, and the second general-purpose port P2 is connected. Similarly, the connection terminal 8b is connected through an I / O circuit using the transistor Q2. The detection signal line of the micro switch 4 is connected to the third general-purpose port P3 of the CPU 9 through a known I / O circuit using the connection terminal 8c and the transistor Q3.

  In this way, the position detecting device for the door closing device using the rotary switch 5 is configured, and the process from the opened state of the door closing device to the fully closed state through the half door state will be described with reference to FIG. . In the open state, both switches SW1 and SW2 are both on as described above, so both transistors Q1 and Q2 are both turned on, and an H level signal is input to both ports P1 and P2. Note that the ratchet 3 is in sliding contact with the outer peripheral surface of the latch 2, whereby the microswitch 4 is in an OFF state, and an H level signal is input to the third general-purpose port P3.

  Next, in the half door state, the first contact 6a is disengaged from the first plate 7a in accordance with the amount of rotation of the rotating member 6, and the first switch SW1 is turned off. The port P1 is at the L level. Further, as described above, the ratchet 3 falls into the half-door detecting recess 2b, and the microswitch 4 is turned on in this state, so that the third general-purpose port P3 becomes L level (the first half of the half-door region in FIG. 4). .

  The ratchet 3 moves from the half-door detecting recess 2b to the slit 2a with the movement from the half-door region of the door to the fully closed position. The intermediate portion 2c is formed to have the same outer diameter as the outer peripheral surface. When the ratchet 3 gets over the outer diameter portion 2c, the microswitch 4 is temporarily turned off, and the third general-purpose port P3 becomes H level.

  The on / off change of the micro switch 4 in such a half-door region is read from the combination of the signals shown in FIG. 4, and it is judged that the door has surely entered the half-door state. Execute. The second contact 6b is disengaged from the second plate 7b in accordance with the amount of rotation of the rotating member 6 due to the door reaching the fully closed position, and the second switch SW2 is turned off. Note that the first switch SW1 remains in the off state. When it is detected from the change in the ON / OFF state of each switch at this time that the door has reached the fully closed position, the automatic fully closed control is terminated.

  Thus, each position of the door required at the time of full closing control in the door closing device can be reliably detected, and automatic door closing control can be performed. For this purpose, there is an advantage that the switch structure can be made compact by using the rotary switch 5 configured as described above for door position detection. However, the rotary switch 5 has the wire harnesses W1, W2, and W3. A total of three harnesses are required, and when the control unit 8 is mounted at a location far from the door, the wire harnesses W1, W2, and W3 that are electrically connected to the rotary switch 5 become long. There are many actuator power supply lines and signal lines between the body and the door. In such a case, it is desired to reduce the number of wirings as much as possible.

  In order to solve such problems and to realize a rotary switch capable of reducing the number of wires and a rotary switch for position detection of a vehicle opening / closing body closing device, in the present invention, it is connected to an external movable member. A rotating member, a main body rotatably supporting the rotating member, a contact provided on one of the rotating member and the main body, a relay plate provided on the other of the rotating member and the main body, and the contact And a first and a second external connection terminal for outputting a conduction state between the relay plates to the outside according to three different rotational positions of the rotating member by the contact and the relay plate. A first switch and a second switch that change an on / off combination are configured, and the first and second switches are connected between the first and second external connection terminals. Together they are connected in parallel with each other, and as the voltage changing means is connected between said at least the first external connection terminal and the second switch.

  Further, the different rotational positions include a first range in which both the first and second switches are turned off, a second range in which only the first switch is turned on, and both the first and second switches. And a third range in which is turned on.

  A rotating member provided to be interlocked with the opening / closing body so as to determine an open position, a half-open position, and a closed position of the opening / closing body closing device of the vehicle; and a main body rotatably supporting the rotating member; , A contact provided on one of the rotating member and the main body, a relay plate provided on the other of the rotating member and the main body, and a signal output to the outside for a conduction state between the contact and the relay plate. A first switch and a second switch having a first and a second external connection terminal, wherein the contact and the relay plate are configured to change a combination of on and off according to the three positions of the rotating member; The first and second switches are connected in parallel between the first and second external connection terminals, and at least the first external connection terminal and the second switch Voltage varying means between the switch is assumed to be connected.

  Further, the three positions include a first range in which both the first and second switches are turned off, a second range in which only the first switch is turned on, and both the first and second switches. The third range was set to ON.

  Thus, according to the present invention, the first and second switches are connected in parallel to each other between the first and second external connection terminals, and at least the first external connection terminal and the second switch, In the case where both switches are off by grounding the second external connection terminal so as to detect the voltage change of the first external connection terminal, for example, since the voltage variable means is connected between When the first external connection terminal is in a predetermined voltage application state, and the first switch is on and the second switch is off, the first external connection terminal is voltage-divided by the voltage variable means When both switches are on, the first external connection terminal is grounded. As a result, three states can be detected by two signal lines connected to both external connection terminals, and the number of signal lines can be reduced as compared to the conventional one using three signal lines. The wiring layout of lines can be made compact.

  In addition, the rotary switch can be used for detecting the position of an opening / closing body closing device of an automobile as a vehicle in the open state / half-door state / full-closed state, and in that case, a wire harness passing between the body and the door Since the number of wires can be reduced, the wiring around the wire harness can be made compact.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a circuit configuration diagram of a door closing device according to the present invention corresponding to FIG. 5 described as a conventional example, (a) is a main part thereof, and (b) is a simplified circuit diagram of a rotary switch of the present invention. is there. In addition, the same code | symbol is attached | subjected to the part similar to the illustration example of the said prior art example, and the detailed description is abbreviate | omitted.

  The latch mechanism constituting the mechanical system of the door closing device provided with a door and a body (not shown) may be the same as in FIG. 5, and is provided with the striker 1, the latch 2, and the ratchet 3 having the same structure. And a rotary switch 5 that rotates in synchronization with the latch 2 is provided.

  Three contacts 6 a, 6 b, 6 c are arranged at appropriate positions on the rotating member 6 of the rotary switch 5 in an electrically conductive state. Each of the contacts 6a to 6c is arranged so as to elastically contact three plates 7a, 7b and 7c made of a conductive member fixed to a case (not shown). Each of the plates 7 a to 7 c is formed in an arc shape so as to have a predetermined length (angle) in the rotation direction of the rotating member 6.

  In this manner, the first and third contacts 6a and 6c and the first and third plates 7a and 7c constitute an opening / closing contact of the first switch SW1, and the second and third contacts 6b and 6c. The second and third plates 7b and 7c form the open / close contact of the second switch SW2 in the same manner as in the conventional example.

  The rotary switch 5 is provided with a first external connection terminal 5a connected to the connection terminal 8a of the control unit 8 and a second external connection terminal 5b grounded. The plate 7a is directly connected to the first external connection terminal 5a and the plate 7b is connected via a resistor R1 as a voltage variable means, and the plate 7c is connected to the second external connection terminal 5b. ing. For example, when the case (main body) of the rotary switch 5 is made of a synthetic resin, the resistor R1 is composed of a wiring material that connects the first plate 7a and the first external connection terminal 5a in the case, and a second material. A chip resistor may be connected between the plate 7b and molded.

  In the control unit 8, a CPU 9 that performs main control is provided, and the connection terminal 8a is connected to the AD port Pad. The constant voltage power supply Vcc and the resistors R2 and R3 are connected between the connection terminal 8a and the AD port Pad so that a predetermined voltage is applied to the AD port Pad when the connection terminal 8a, that is, the first external connection terminal 5a is open. -R4 is connected.

  Further, one of the pair of connection lines of the micro switch 4 is connected to the connection terminal 8b connected to the power source Vcc so that the on / off signal of the micro switch 4 is input to the switch port Psw for the switch signal input of the CPU 9. The other is connected to the connection terminal 8c. The connection terminal 8c is connected to the switch port Psw through an I / O circuit using the transistor Q1. In the figure, when the microswitch 4 is in an off state, the connection terminal 8c is open and the switch port Psw is at a high (H) level, and when the microswitch 4 is in an on state, the connection terminal 8c is in a predetermined voltage application state. Psw becomes low (L) level.

  An operation procedure in the illustrated example of the present invention configured as described above will be described below with reference to FIG. First, in the door open state (first range) in FIG. 1, the positional relationship between the contacts 6a to 6c and the plates 7a to 7c is as shown in the figure. In this state, each contact other than the grounded contact 6c is shown. The contacts 6a and 6b are not in contact with the corresponding plates 7a and 7b, respectively, and the first and second switches SW1 and SW2 are both in an off state. Therefore, when the first external connection terminal 5a is in an open state, a predetermined high voltage V1 (for example, 13.5 V) is applied to the AD port Pad. Note that the microswitch 4 is in an off state, and the switch port Psw is in an H level state.

  By the door closing operation, the striker 1 moves from the state shown by the two-dot chain line in FIG. 1 to the state shown by the solid line, and further, the striker 1 and the slit 2a are engaged by the door closing operation. The latch 2 rotates in the direction indicated by the arrow B in accordance with the movement of the striker 1 accompanying the closing of the door. When the latch 2 rotates by a predetermined amount (angle), the extended end portion 3a of the ratchet 3 falls into the half-door detecting recess 2b, and the lever portion 3b of the ratchet 3 is displaced in the direction of the arrow C along with the movement thereof. 4 turns on (FIG. 3).

  Thus, the first half state (second range) of the half door region of FIG. 2 is obtained. That is, as shown in FIG. 3, the contact 6c is grounded and the contact 6b and the plate 7b are in contact (the second switch SW2 is on), but the contact 6a and the plate 7a are in a non-contact state (the first switch Since SW1 is off), the first external connection terminal 5a is grounded via the resistor R1, and a constant voltage V2 (for example, 7V) obtained by dividing the constant voltage Vcc is applied to the AD port Pad. As described above, since the microswitch 4 is turned on, the switch port Psw is in the L level state.

  When the door closing operation proceeds in the half door state, when the latch 2 is further rotated in the direction of arrow B by being pushed by the striker 1, the extended end portion 3a of the ratchet 3 once escapes from the half door detecting recess 2b and the half door It rides on a portion 2c between the detection recess 2b and the slit 2a. Thereby, the microswitch 4 is turned off. Even in this state, the relationship between the contacts 6a to 6c and the plates 7a to 7c remains in the half door state, so the voltage levels of the ports Pad and Psw are shown in the latter half of the half door region of FIG. It comes to be.

  When the door reaches the fully closed position (region), as shown in FIG. 4, the extended end 3a of the ratchet 3 now falls into the slit 2a, whereby the microswitch 4 is turned on again (switch port Psw). Is in the L level state). The latch 2 is elastically biased in the direction opposite to the direction indicated by the arrow B in the figure, so that the extended end 3a is engaged with the wall portion of the slit 2a in a state where the extended end 3a falls into the slit 2a. Therefore, since the latch 2 is prevented from rotating in the opening direction, the fully closed state of the door is maintained.

  In this fully closed state, the contact 6c is grounded and the contact 6a is in contact with the plate 7a. Therefore, the first external connection terminal 5a is grounded, the AD port Pad becomes L level (0 V), and the state of the fully closed region (third range) in FIG. 2 is obtained.

  In this way, it is possible to determine each state from the open state of the door to the half door and the fully closed state, and therefore the signal line from the rotary switch 5 is connected to the first external connection terminal 5a in the illustrated example. There are a total of two wire harnesses W4 for connecting the terminal 8a and a wire harness W3 for grounding the external connection terminal 5c. Therefore, the number of signal lines can be reduced, and the number of wire harnesses can be reduced to improve wiring handling.

  In the present embodiment, the three states of the voltage level are discriminated by the AD port Pad. However, in the IC chip including the CPU, the AD port has an AD port and the analog voltage is converted into a digital level by the digital conversion. What distinguishes the difference between the two can be configured with an inexpensive chip, so that the problem of high cost does not occur.

  Furthermore, in the present embodiment, the resistor R1 is used as the voltage changing means. However, the present invention is not limited to this, and for example, a voltage drop characteristic of a diode can be used. For example, when a silicon-based diode is used, the voltage drop amount is about 0.6 V, so that three of them may be connected in series and a potential difference of 1.8 V may be determined by the AD port.

  The rotary switch according to the present invention can reduce the number of signal lines, and is useful as a device that uses a rotary switch for three-position discrimination.

(A) is a circuit block diagram of the door closing device for motor vehicles by which this invention was applied, (b) is a simplified circuit diagram of a rotary switch part. It is a figure which shows the output signal of the rotary switch and micro switch in the closure apparatus of FIG. It is a fragmentary view corresponding to Drawing 1 showing a half door state. FIG. 2 is a partial view corresponding to FIG. 1 showing a fully closed state. It is a circuit block diagram of the conventional door closing device for motor vehicles. It is a figure which shows the output signal of the rotary switch and micro switch in the closure apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Striker 2 Latch 3 Ratchet 4 Micro switch 5 Rotary switch, 5a 1st external connection terminal, 5b 2nd external connection terminal 6 Rotating member, 6a * 6b * 6c Contact 7a * 7b * 7c Conductive plate 8 Control unit 9 CPU
Pad AD port Psw Switch port

Claims (4)

A rotating member coupled to an external movable member; a main body that rotatably supports the rotating member; a contact provided on one of the rotating member and the main body; and a rotary member provided on the other of the rotating member and the main body. A relay plate, and first and second external connection terminals for outputting a signal between the contact and the relay plate to the outside,
The contact and the relay plate constitute a first switch and a second switch in which an on / off combination changes according to a different rotational position of the rotating member,
The first and second switches are connected in parallel between the first and second external connection terminals, and the voltage is variable at least between the first external connection terminal and the second switch. A rotary switch characterized in that means are connected.   The different rotational positions include a first range in which both the first and second switches are turned off, a second range in which only the first switch is turned on, and both the first and second switches are turned on. The rotary switch according to claim 1, comprising: a third range. A rotating member provided so as to interlock with the closing device to determine three positions of an open position, a half-open position, and a closed position of the opening / closing body closing device of the vehicle; a main body that rotatably supports the rotating member; A contact provided on one of the rotating member and the main body, a relay plate provided on the other of the rotating member and the main body, and a first for outputting a signal between the contact and the relay plate to the outside. And a second external connection terminal,
The contact and the relay plate constitute first and second switches in which a combination of on and off changes according to the three positions of the rotating member,
The first and second switches are connected in parallel between the first and second external connection terminals, and the voltage is variable at least between the first external connection terminal and the second switch. A position detecting rotary switch for a vehicle opening / closing body closing device, characterized in that means are connected.   The three positions include a first range in which both the first and second switches are turned off, a second range in which only the first switch is turned on, and both the first and second switches are turned on. The position detecting rotary switch of the opening / closing body closing device for a vehicle according to claim 3, comprising a third range.

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