JPS6321474Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sensor that detects the rotational direction of a rotating body of a handle.

A turn signal switch device for an automobile is closed when a lever is manually rotated, and opened when the handle is reversed and the lever is automatically returned to a neutral position. In other words, since this type of switch controls opening and closing by mechanically releasing the operating lever of the switch by rotating the handle, the mounting position of the switch is limited to the area around the handle shaft, which makes the design difficult. There is little freedom in

Incidentally, in recent years, there has been a demand for a new conceptual change in the design of automobile instrument panels, and it has also become necessary to increase the degree of freedom in the mounting position of direction indicating switches. That is, there is a need for a direction indicator switch that can be electrically held and electrically released. However, one of the things that makes it difficult to realize the electrical direction switch described above is the need for a sensor that electrically detects the rotation of the handle and detects the direction of rotation of the handle in order to release the electrical hold on the switch. be.

This invention relates to an improvement of sensors for detecting the direction of rotation, and its object is to provide a rotation direction detection sensor that can reliably detect the direction of rotation of a rotating body such as a steering wheel by simply attaching a switch of simple structure around the steering shaft.

Another object of the present invention is to provide a rotational direction detection sensor that has a reduced number of parts, reduces costs, is downsized, and produces almost no operating noise.

Next, embodiments of the present invention will be described with reference to the drawings.

1 to 5 show a first embodiment, 1 is a handle, 2 is a shaft that rotates with the rotation of the handle 1, and 3 is a fixed part such as a housing disposed around the outer circumference of the shaft 2 (Fig. A cylindrical portion 3a is formed in the center of the fixing member (not shown), into which the shaft 2 is inserted. Further, on the outer peripheral upper surface of the fixing member 3, a left fixed contact 3b and a right fixed contact 3c are formed at an angle of about 120 degrees apart, as shown in FIGS. 3 to 5. Further, the inner peripheral side of this fixing member 3 is formed into a recessed part 3d, and the stepped part has the above-mentioned left and right fixed contacts 3b and 3c, respectively.
Guide grooves 3e of a desired length are formed at an angle of 120 degrees. Reference numeral 4 denotes a rotor having a cylindrical portion 4a that is fitted into the cylindrical portion 3a of the fixed member 3, and a protrusion 4c is formed on the upper surface of the flange portion 4b, which is fitted into a small hole 1a formed on the lower surface of the handle 1. ing. Therefore, as the handle 1 rotates, the rotor 4
is rotated. Reference numeral 5 denotes a movable member having a cylindrical portion 5a that is fitted into the cylindrical portion 4a of the rotor 4, and the cylindrical portion 5a is slidable in the direction of the shaft 2 with respect to the cylindrical portion 4a, but is restricted in the direction of rotation. has been done. On the lower surface of the flange 5b of the movable member 5, there is one movable contact 5c branched into two, and the movable contact 5c.
A ring-shaped pressure protrusion 5d except for c is formed. Further, one of the movable contacts 5c contacts the fixed contacts 3b and 3c of the fixed member 3. Reference numeral 6 designates an auxiliary movable member which rotates together with the movable member 5 and is slidable in the direction of the shaft 2, and has a stepped portion 6a formed on its outer peripheral surface. 7
is a semi-fixed member whose inner peripheral surface is placed on the stepped portion 6a of the auxiliary movable member 6, and a stopper 7a to be inserted into the guide groove 3e of the fixed member 3 is formed on the outer periphery of the semi-fixed member. Also, on the top surface of the semi-fixed member 7, approximately
Ring-shaped semi-fixed contact 7b over an angle of 240 degrees
is formed. The pressurizing ridge 5d of the movable member 5 described above is in contact with the upper surface of the outer periphery of the semi-fixed member 7. 8 is the flange 4b of the rotor 4 and the movable member 5
The movable member 5 is pressed by a spring interposed between the flange 5b and the flange 5b. Therefore, the pressing protrusion 5d of the movable member 5 presses the semi-fixed member 7, and the semi-fixed member 7 presses the stepped portion 6a of the auxiliary movable member 6. Since the auxiliary movable member 6 rotates together with the movable member 5, friction occurs between the outer periphery of the semi-fixed member 7 and the pressing ridge 5d of the movable member 5, and the inner periphery of the semi-fixed member 7 rotates with the auxiliary movable member 5. Friction occurs between the member 6 and the stepped portion 6a. As a result, when the rotor 4 is rotated with the rotation of the handle 1, due to the friction between the movable member 5 and the auxiliary movable member 6, the stopper 7a is moved in the rotational direction of the rotor 4 until it comes into contact with the end surface of the guide groove 3e. be rotated. This half-fixed contact 7b is in a parallel state with either of the fixed contacts 3b and 3c.
That is, when the handle 1 is rotated clockwise, the semi-fixed member 7 is rotated in the direction of the arrow in FIG.
When a contacts the end surface of the guide groove 3e, the left fixed contact 3b and the semi-fixed contact 7b are in a parallel state. Therefore, when the handle 1 is further rotated and the movable contact 5c of the movable member 5 passes both the contacts 3b and 7b, the contact between the two contacts 3b and 7b is closed. When the handle 1 is rotated to the left, the movable contact 5c closes the fixed contact 3c and the semi-fixed contact 7b as shown in FIG.

FIG. 6 shows another embodiment. While in the above embodiment the semi-fixed member 7 is held between the movable member 5 and the auxiliary movable member 6 and rotated, in this embodiment the semi-fixed member 7 is held and rotated by the spring 8. In addition to pressing the fixed member 7, the auxiliary movable member 6 is omitted, and movable contacts 5c electrically connected to the upper and lower surfaces of the movable member 5 are formed. That is, the semi-fixed member 7 is rotated by friction with the outer peripheral portion of the movable member 5.

Next, using the rotation direction detection sensor described above,
The operation of canceling a direction indicator light in an automobile will be explained with reference to FIG.

9R, 9L are left/right direction switch, 10R,
10L is set when the direction indicating switches 9R, 9L are closed, and the internal relays 10R', 10L are set.
A latch circuit that closes the contact by energizing L', 11 a direction indicating flasher that sends out a pulse signal with a constant cycle, and 12R and 12L the relays 10R' and 1
The right and left direction indicator lights 13 connected to the contacts 0L' are cancel switches which manually reset the latch circuits 10R and 10L via diodes 14 without using the direction indicator sensor.

Next, the operation will be explained. When the right direction indicating switch 9R is closed, the latch circuit 10R is set and the contact of the relay 10R' is closed.
Therefore, the right direction indicator light 12R blinks by the flasher 11.

If you want to stop blinking the right direction indicator light 12R, close the cancel switch 13, and the reset terminal of the latch circuit 10R becomes ground potential via the diode 14, so the latch circuit 10R is reset and the relay 10R' becomes inoperative and the right direction indicator light 12R is turned off.

Next, a description will be given of the operation of automatically turning off the right direction indicator light 12R by operating the reverse rotation handle after turning right while the right direction indicator light 12R is blinking.

When the handle 1 is rotated to the right, the semi-fixed member 7
is rotated clockwise as shown in Fig. 4, and the fixed contact 3b
The semi-fixed contact 7b is closed by the movable contact 5c, and the closing of this switch is performed by the latch circuit 10R.
does not have any influence on

Then, when the handle 1 is rotated to the left by the reverse rotation handle operation after the clockwise turn is completed, the semi-fixed member 7 is also rotated to the left, and then the movable contact 5c moves between the fixed contact 3c and the semi-fixed contact 7b. Closed. Therefore, the reset terminal of the latch circuit 10R becomes ground potential and is reset, so that the relay 10
R' becomes inoperative and the direction indicator light 12R is turned off.

In the above embodiment, the case where the flashing operation of the right direction indicator light 12R is canceled has been described, but the operation is the same as that described above when the blinking operation of the left direction indicator lamp 12L is canceled, so a description thereof will be omitted.

As described above, in the present invention, the semi-fixed member is rotated by a desired angle by the movable member that rotates together with a rotating body such as a handle, and at this rotated position, the movable contact of the movable member connects with the semi-fixed contact of the semi-fixed member. Since the fixed contact of the fixed member is short-circuited, the rotating direction of the rotating body can be reliably detected with a simple structure, and the product can be made smaller and lower in cost, as well as produce less noise during operation. It has the following effects:

[Brief explanation of drawings]

The figures show an embodiment of the rotational direction detection sensor according to the present invention, and FIG. 1 is a sectional view of the first embodiment, and FIG.
The figure is a plan view of the movable member, Fig. 3 is a plan view of the fixed member and semi-fixed member, Figs. 4 and 5 are plan views after operation with the members of Figs.
The figure is a cross-sectional view of another embodiment, and FIG. 7 is a circuit diagram for controlling the direction indicator light. 1... Handle, 2... Shaft, 3... Fixed member, 5... Movable member, 7... Semi-fixed member, 3
b, 3c...Fixed contact, 5c...Movable contact, 7b
...Semi-fixed contact.

Claims (1)

[Claims for Utility Model Registration] A movable member that has movable contacts and is rotated as the handle rotates, and a semi-fixed member that has fixed contacts for left rotation and right rotation, which will be described later. a fixed member having a left rotation stopper portion and a right rotation stopper that limit the interlocking rotation within a predetermined angle; and a fixed member that contacts the movable member and causes the left rotation stopper portion of the fixed member to be stopped by a frictional force between the movable member and the movable member. or a semi-fixed member that rotates in conjunction with the clockwise rotation stopper until it stops and that has at least one semi-fixed contact; and a semi-fixed member that electrically contacts the fixed contacts for left rotation and clockwise rotation, respectively. 1. Comprised of a second conductive member and at least one third conductive member that electrically contacts the semi-fixed contact, and as the handle rotates to the left, the semi-fixed member moves to the left rotation stopper portion. In the adjacent rotating region where they come into contact, the counterclockwise rotation fixed contact is electrically connected to the semi-fixed contact via the movable contact, and the first and third conductive members are electrically connected, and as the handle rotates clockwise, the semi-fixed member In the vicinity of the rotating region where the contact point contacts the clockwise rotation stopper portion, the fixed contact for clockwise rotation is electrically connected to the semi-fixed contact via a movable contact, and the second and third conductive members are electrically connected. Rotation direction detection sensor.