JPH0332021Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a switch device having a contact mechanism that is switched by a slider that reciprocates between an operating position and a return position, and in particular a heart-shaped cam formed on the slider. This relates to a switch device in which the slider is held in the operating position by the cooperative action of the groove and the latch wire spring, and its purpose is to automatically return the operating member from the operating position to the return position by means of an electromagnetic device. This allows for improved operability and eliminates the risk of complicating the structure.
Furthermore, it is an object of the present invention to provide a switch device that has the effect of reducing the size of an electromagnetic device.

Hereinafter, an embodiment in which the present invention is applied to a daylight switch in an automobile will be described with reference to the drawings.

In Figures 1 to 4, 1 is a rectangular box-shaped case body with an opening 1a on the top surface, and 2 is a case body that can be moved back and forth in the directions of arrows X and counter-arrow X in Figure 1. This slider 2 has an operating shaft 2a that protrudes outside the case body 1 through a through hole 1b of the case body 1. Further, reference numeral 3 denotes a compression coil spring serving as a spring means for constantly urging the slider 2 in the direction of the arrow X. Reference numeral 4 denotes a protrusion provided on the lower surface of the slider 2, which projects out of the case body 1 through an elongated hole 1c formed on the lower surface of the case body 1. Reference numeral 5 denotes a contact mechanism that is switched by the protrusion 4, and this contact mechanism 5 is
When the slider 2 is in the return position as shown in FIG.
The configuration forms the high beam circuit of the headlamp when in the operating position moved in the direction. 6
is a heart-shaped cam groove formed on the upper surface of the slider 2, which has a shape as shown in FIG. 4, as is well known in this type of switch device. Reference numeral 7 denotes a wire spring for a latch, which is a long spring for a latch, and this has a coil portion 7a at its base that is attached to the shaft portion 1d of the case body 1, which is a stationary portion, so that the slider 2 can be moved. The first direction, which is perpendicular to the direction
It is provided so as to swing in the directions of arrow Y and counter-arrow Y in the figure. The latch wire spring 7 is provided so that its free end is always biased in the direction of the arrow Y in FIG. It is engaged with the cam groove 6, and the cam groove 6 and the latch wire spring 7 constitute a well-known locking mechanism 8. Reference numeral 9 denotes a cancel member which is provided so as to be reciprocally movable in the directions of arrow Y and counter-arrow Y via a guide portion 10 formed on the upper surface of the case body 1, and the latch wire spring 7 is fitted into the lower surface of this cancel member. Recessed part 9 of the shape obtained
a is formed to straddle the wire spring 7. In this case, when the slider 2 is in the return position (the locking portion 7b of the latch wire spring 7 is in the position indicated by a in FIG. 4), the latch wire spring 7 is moved as shown in FIG. It is not until the slider 2 is moved to the operating position (the locking portion 7b is in the position shown by b in FIG. 4) that the latch wire spring 7 is inserted into the cam groove 6 without being fitted into the recess 9a. As shown in FIG. 3, it is floated up and fitted into the recess 9a. In addition, 11 always points the cancel member 9 to arrow Y.
The plate spring 12 for biasing the cancel member 9 in the direction is an electromagnetic solenoid, which is an electromagnetic device, whose plunger 12a is directly connected to the cancel member 9. 11 in the opposite direction of arrow Y. In addition, the above electromagnetic solenoid 1
2 is wired so as to be energized via a photo switch (not shown) which detects the headlights of an oncoming vehicle and turns it on when the vehicle encounters an oncoming vehicle at night.

Next, the operation of the above configuration will be explained with reference to FIG. 5 as well. In addition, FIGS. 5a and 5b show the locking portion 7b.
4 shows cam curves when the cam is moved within the heart-shaped cam groove 6 along each path indicated by arrow A or B in FIG. 4. That is, if the light switch of the automobile is turned on and the slider 2 is in the return position (the state shown in FIG. A circuit is formed and the headlamp is lit in low beam. When switching the headlamp to high beam in such a state, the operating shaft 2a of the slider 2 is pressed in the opposite direction of the arrow X. Then, the locking portion 7b of the latch wire spring 7 is moved in the direction of arrow X relative to the heart-shaped cam groove 6, and the locking portion 7b is shown in FIGS. 4 and 5, respectively. It is moved along path A from the position indicated by a to the position indicated by a' in FIGS. 4 and 5, respectively. In this state, the operating shaft 2a
When the pressing operation is released, the slider 2 is moved in the direction of the arrow X by the compression coil spring 3, so the locking portion 7b is relatively moved along the path A in the opposite direction of the arrow The child part 7b is a convex part 6a in the cam groove 6
The position b (Fig. 4,
(see Figure 5), further movement of the slider 2 is restrained, and the slider 2 is moved by the cooperative action of the cam groove 6 and the latch wire spring 7. and is held in the operating position. When the slider 2 is in the operating position as described above, the contact mechanism 5 is switched and a high beam circuit of the headlamp is formed by the contact mechanism 5, and the headlamp is turned on with a high beam. To switch the headlamp to low beam from this state, the operating shaft 2a is pressed again in the direction opposite to the arrow X. Then, the locking part 7b moves from the position b to the fourth position along the path A.
Since the slider 2 is moved to the position indicated by b' in FIG. Since the locking portion 7 is moved back to
b is relatively moved in the opposite direction of arrow 5 forms a low beam circuit for the headlamp.

On the other hand, when the high beam circuit of the headlamp is formed as described above, in other words, the slider 2 is in the operating position, when the photo switch (not shown) that detects the headlamp from an oncoming vehicle is turned on, the electromagnetic solenoid 12 is energized, and the cancel member 9 is moved in the opposite direction of the arrow Y. In this case, that is, when the slider 2 is in the operating position, the latch wire spring 7 is positioned so as to fit into the recess 9a of the cancel member 9 as described above. When moved in the direction opposite to the arrow Y, the locking portion 7b of the latch wire spring 7 is moved from the position b shown in FIGS. 4 and 5 b in the direction opposite to the arrow Y, which is the cancel direction.
The locking of the locking portion 7b by the convex portion 6a is released.
Then, the slider 2 is moved back in the direction of the arrow X by the compression coil spring 3, so the locking portion 7b is relatively moved in the opposite direction of the arrow X along the path B.
As a result, the locking portion 7b is moved to position a, the slider 2 is stopped at the return position, and the contact mechanism 5 is automatically switched to a state in which the low beam circuit of the headlamp is formed.

According to the above-mentioned embodiment, in addition to manual headlamp beam switching, it can be operated as a so-called semi-automatic day switch which has the function of automatically switching from high beam to low beam when an oncoming vehicle is encountered. In this case, the mechanical part for manually switching the beam of the headlamp, that is, the part consisting of the main body case 1, slider 2, compression coil spring 3, contact mechanism 5, heart-shaped cam groove 6, latch wire spring 7, etc. The conventional product can be used as it is, and therefore, in order to function as a semi-automatic daylight switch, the cancel member 9,
It is only necessary to additionally provide the leaf spring 11, electromagnetic solenoid 12, etc., and the complexity of the structure can be prevented as much as possible. Moreover, in this case, the electromagnetic solenoid 12 only needs to have the function of moving the locking part 7b of the latch wire spring 7 by a short stroke against the relatively weak spring force.
2 can be made smaller. In addition, electromagnetic solenoid 1
2 is only energized for a short time during automatic beam switching, so it is possible to reduce power consumption. Moreover, since the cancel member 9 is provided in a state in which it is not connected to the locking portion 7b, when external vibrations are applied to the main body case 1, the vibrations of the cancel member 9 are transmitted to the locking portion 7b. Therefore, there is no possibility that the state in which the slider 2 is held in the operating position will be released inadvertently, and the vibration resistance and thus the operating reliability are improved. Furthermore, the electromagnetic solenoid 12 directly connected to the cancel member 9 is
The suction force is applied in the moving direction of the cancel member 9 (counter-arrow Y direction) to swing the latch wire spring 7 in the cancel direction, which is the counter-arrow Y direction. Since the swing direction of the wire spring 7 is the same, the suction efficiency of the electromagnetic solenoid 12 is improved, and from this point of view as well, the electromagnetic solenoid 12 can be made smaller.

According to the present invention, as explained above, the operating member for switching the contact mechanism can be automatically returned from the operating position to the return position by an electromagnetic device,
It is an object of the present invention to provide a switch device that can improve operability, eliminate the risk of complicating the structure, and further improve operational reliability and reduce the size of the electromagnetic device. can.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an overall plan view, FIGS. 2 and 3 are longitudinal sectional views in different states, and FIG. 4 is a plan view of a heart-shaped cam groove. , FIG. 5 is a cam curve diagram of the heart-shaped cam groove. In the figure, 2 is a slider, 3 is a compression coil spring (spring means), 5 is a contact mechanism, 6 is a heart-shaped cam groove, and 7
7b is a locking portion, 9 is a cancel member, and 12 is an electromagnetic solenoid (electromagnetic device).

Claims (1)

[Scope of utility model registration request] A slider provided to be reciprocally movable, a spring means that always biases the slider in one direction, and a contact that is switched as the slider is moved between an operating position and a return position. a mechanism, a heart-shaped cam groove formed in the slider, and an elongated latch whose proximal end is supported by a stationary portion and is swingable in a direction perpendicular to the moving direction of the slider. spring and
A locking portion is provided at the free end of the latch spring to move within the cam groove as the slider moves, and cooperates with the cam groove to hold the slider in the operating position. In the switch device, the state in which the heart-shaped cam groove is held in the operating position of the slider by the locking portion is released when the latch spring is swung in a predetermined cancel direction. The locking portion is provided so as to be reciprocally movable in the swinging direction of the latch spring, and when the locking portion is moved while holding the slider in the operating position, the locking portion comes into contact with the locking portion. a cancel member that contacts and swings the latch spring in the cancel direction; and a cancel member that is directly connected to apply a suction force to the cancel member in the direction of movement thereof, and that in response to the suction action causes the cancel member to cancel the latch spring. A switch device comprising an electromagnetic device that moves in a direction.