JPS64346Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Technical Field of the Invention>> The present invention relates to a vehicle auxiliary headlamp that is attached to a vehicle such as an automobile.

<<Prior art and its problems>> Examples of auxiliary headlights provided in vehicles such as automobiles include spot lamps, fog lamps, and the like. The lenses used differ depending on the purpose, such as fog lamps using dispersed light and spot lamps using focused light.

In other words, this type of auxiliary headlamp can be used only if it is manufactured as a fog lamp, and if it is manufactured as a spot lamp, it can only function as a spot lamp. In addition to spot lamps, fog lamps must also be equipped in cases where fog lamps are required only temporarily, such as when fog appears while driving with spot lamps.

FIG. 7 is a side view showing an example of an auxiliary headlamp for a vehicle that can eliminate such inconveniences. The vehicle auxiliary headlamp a shown in this figure is a spot lamp b with a lens cover c attached to it. When using this as a spot lamp, the fog lamp lens cover c is positioned above and the lens cover c is attached to the spot lamp b. If you want to use the emitted light as it is and use it as a fog lamp, rotate the lens cover c for the fog lamp in the direction of the arrow d and position it in front of the spot lamp b, so that the light emitted from the spot lamp b can be used as a fog lamp. It is designed to be used by diffusing the light with the lens cover C.

FIG. 8 is a diagram showing a drive circuit for such a vehicle auxiliary headlamp a. The circuit shown in this figure consists of a power source e, two hand switches f and g, a motor h that drives a fog lamp lens cover c, a cam plate j that rotates in conjunction with the fog lamp lens cover c, and a cam plate j that rotates in conjunction with the fog lamp lens cover c. It is equipped with micro switches k and L that are turned on and off by a cam plate j, and if the hand switches f and g are switched to rotate the motor h in the forward (or reverse) direction, this The cam plate j and the fog lamp lens cover c are rotationally driven by the motor h, and when the fog lamp lens cover c is in a predetermined position in front of (or above) the spot lamp b, the cam pin M1 ( Alternatively, the cam pin M2) turns off the micro switch k (or the micro switch L) to stop the motor h.

By the way, such a conventional drive circuit is one in which a gearbox n is housed in a spot lamp b as shown in FIG. 7, and two microswitches k and L are built into this gearbox n as shown in FIG. Therefore, the micro switches k and L could not be incorporated unless the gearbox n was made larger. In addition, after installing micro switches k and L in gear box n, it is necessary to insert a screwdriver or the like into gear box n to adjust micro switches k and L, and the operation of micro switches k and L and cam plate j must be adjusted. The problem was that it was difficult to adjust the timing. Also,
The motor h is designed to stop when either the microswitches k or L are turned off by the cam plate j, but in reality, the motor h and the mechanical system driven by the motor h are There was a problem in that the motor h continued to rotate due to the inertia of , making it difficult for the fog lamp lens cover c to stop in a fixed position.

[Purpose of the invention] In view of the above circumstances, this invention enables the position of the fog lamp lens body to be detected without using a micro switch, thereby making it possible to reduce the size of the gear box and eliminating the need for adjustment. To provide an auxiliary headlamp for a vehicle that is capable of reliably stopping a lens cover for a foglamp at a fixed position without being affected by the inertia of a mechanical system driven by a motor. The purpose is

<<Structure of the invention>> In order to achieve this object, an auxiliary headlamp for a vehicle according to this invention includes a lamp housing, a lens disposed on the front surface of the lamp housing, and a lens defined by the lens and the lamp housing. An auxiliary headlamp for a vehicle includes a light source bulb disposed in a light chamber and a movable lens cover selectively disposed to cover the front surface of the lens, the lens cover being connected to a motor. It opens and closes by rotation, and in conjunction with this, switches the contact of the contact with three contact protrusions to the three fixed sections, thereby allowing the motor to be reversed in the normal direction and stopped due to a short circuit. .

<<Description of Embodiment>> FIG. 1 is a circuit diagram showing an embodiment of this invention. The drive circuit shown in this figure includes a power source 1, a hand switch 2, a fog relay coil 3, a spot relay coil 4, and a fog lens position detector 5.
, a fog relay contact section 6 , a spot relay contact section 7 , and a motor 8 .

The power source 1 is composed of a battery installed in the vehicle, and the positive terminal of the power source 1 is connected to the common contact 2a of the hand switch 2 and the contacts 6b and 7b of the contact portions 6 and 7. There is. The hand switch 2 is installed near the driver's seat of the vehicle, and one contact point 2b is connected to the fog relay coil 3.
The other contact point 2c is connected to the second fixed section 9b of the fog lens position detecting section 5 via the spot relay coil 4.

Further, in the fog relay contact section 6, the common contact 6a and the normally closed contact 6c are connected when the fog relay coil 3 is in a non-excited state, and the common contact 6a and the normally closed contact 6c are connected when the fog relay coil 3 is in an energized state. , normally open contact 6b, the contact 6c is connected to the contact 7c of the spot relay contact section 7, and is also connected to the negative terminal of the power source 1, and the common contact 6a is connected to the negative terminal of the motor 8. 1
It is connected to terminal 8a.

Further, in the spot relay contact section 7, the common contact 7a and the normally closed contact 7c are connected when the spot relay coil 4 is in a non-excited state, and the common contact 7a is connected when the spot relay coil 4 is in an energized state. and the normally open contact 7b are connected, and the common contact 7a is connected to the second terminal 8b of the motor 8.
It is connected to the. The motor 8 rotates a lens cover 12 for a fog lamp which is rotatably attached to the spot lamp section 10 through a shaft 11, and this motor 8 is connected to a gear box in the spot lamp section 10 as shown in FIG. It is housed in 13. In FIG. 2, 35 is a reflector, 36 is a light source bulb, 37 is a spot condensing lens, and 38 is a lamp housing.
As shown in FIG. 3, the gearbox 13 includes a gearbox board 14, a motor 8 attached to the gear storage surface side of the gearbox board 14, a gear section 15 consisting of gears 17 to 20, and a gear part 15 that closes the gear storage surface side. It has a cover 16,
A corner portion 22 is formed at one end of a drive shaft 21, which is the shaft of the gear 20, and an engaging portion 23 is formed at the other end. The corner portion 22 is a portion fixed to the shaft 11 as shown in FIG.
When the lens rotates, the fog lamp lens cover 12 rotates around the shaft 11. Furthermore, the engaging portion 23
As shown in FIG. 4, the contact base 24 and the contactor 25 are inserted into the contact base 24 and the contactor 25. When the drive shaft 21 rotates, the contact base 24 and the contactor 25 rotate accordingly. The contactor 25 is a conductive plate insulated by a contact base 24 made of an insulator and an insulating part 39 so as not to come into direct contact with the gearbox board 14, and as shown in FIG. Contact protrusions 26a, 26b, and 26c are formed at intervals. The contact protrusions 26a to 26c come into sliding contact with the first to third fixed sections 9a to 9c etched on the printed circuit board 27, respectively, and as shown in FIG. The fog lens position detecting section 5 is constituted by the third fixed sections 9a to 9c.

Next, the operation of this embodiment will be explained with reference to FIGS. 5A and 5B and FIGS. 6A and 6B.

First, in the state shown in FIG. 5A and FIG. 6A, if you operate the hand switch 2 to bring the common contact 2a and the contact 2c into contact, the positive terminal of the power source 1 → the hand switch 2
common contact 2a → contact 2c of same hand switch 2 →
Spot relay coil 4 → second fixed piece 9b →
Second contact protrusion 26b of contactor 25 → third contact protrusion 26c of contactor 25 → third fixed piece 9
A current flows through the spot relay coil 4 through the path c→the negative terminal of the power source 1, and it is excited, so that the common contact 7a and the contact 7b of the spot relay contact portion 7 come into contact with each other. As a result, the positive terminal of the power supply 1→the contact 7b of the spot relay contact section 7→
Common contact 7a of the relay contact section 7 for the same spot → second terminal 8b of the motor 8 → first terminal 8 of the same motor 8
A current flows through the motor 8 through the path a→common contact 6a of the fog relay contact section 6→contact 6c of the fog relay contact section 6→negative terminal of the power source 1, and the motor 8 rotates in the normal rotation direction. As a result, the gear portion 15 rotates the fog lamp lens cover 12 and the contactor 25 in the direction of arrow 29. Next, as shown in FIG. 5B and FIG. 6B, the gear part 15
When the second contact protrusion 26b of the contactor 25 is removed from the second fixed section 9b by driving,
The spot relay coil 4 is no longer energized,
The common contact 7a of the spot relay contact section 7 contacts the contact 7c. As a result, the first terminal 8a of the motor 8 → the common contact 6a of the fog relay contact part 6 →
A closed loop is formed with the following route: contact 6c of the relay contact section 6 for the fog → contact 7c of the relay contact section 7 for the spot → common contact 7a of the relay contact section 7 for the spot → second terminal 8b of the motor 8. A brake is applied to the motor 8 by.
As a result, the fog lamp lens cover 12 instantly stops above the spot lamp section 10, that is, at a predetermined spot position.

Next, in this state, common contact 2 of hand switch 2
If a and contact 2b are connected, the positive terminal of power supply 1 → common contact 2a of hand switch 2 → contact 2b of hand switch 2 → fog relay coil 3 → first
Fixed section 9a → first contact protrusion 2 of contactor 25
6a→Third contact protrusion 26c of the same contactor 25→
A current flows through the fog relay coil 3 through a path from the third fixed section 9c to the negative terminal of the power source 1, energizing it, and the common contact 6a and the contact 6b of the fog relay contact portion 6 come into contact. As a result, the positive terminal of the power supply 1 → the contact 6b of the relay contact part 6 for the fog → the common contact 6a of the relay contact part 6 for the same fog → the first terminal 8a of the motor 8 → the second terminal 8b of the same motor 8 → the spot A current flows through the motor 8 through a path of common contact 7a of the relay contact section 7→contact 7c of the relay contact section 7 for the same spot→the negative terminal of the power source 1, and the motor 8 rotates in the reverse direction. As a result, the gear portion 15 rotates the fog lamp lens cover 12 and the contactor 25 in the direction of arrow 30. Next, as shown in FIG. 5A and FIG. 6A, this contactor 2
When the first contact protrusion 26a of 5 is removed from the first fixed piece 9a, the fog relay coil 3 is no longer energized, and the common contact 6a of the fog relay contact section 6
contacts the contact point 6c. As a result, the first terminal 8a of the motor 8→the common contact 6a of the relay contact section 6 for the fog→the contact 6c of the relay contact section 6 for the same fog→the contact 7c of the relay contact section 7 for the spot→the relay contact section 7 for the same spot. A closed loop with a route from the common contact 7a of the motor 8 to the second terminal 8b of the motor 8 is formed, and the motor 8 is braked by this closed loop. As a result, fog lamp lens cover 1
2 stops instantaneously in front of the spot lamp section 10, that is, at a predetermined fog position.

《Effects of the invention》 As explained above, the auxiliary headlight for vehicles according to this invention can detect the position of the fog lamp lens cover without using a micro switch, and this allows the gearbox to be made smaller. This eliminates the need for microswitch adjustment, and allows the fog lamp lens cover to be reliably stopped at a fixed position without being affected by the inertia of a mechanical system driven by a motor.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing an embodiment of this invention, and Fig. 2 is a spot lamp section 1 used in the embodiment.
3 is an exploded perspective view of the gearbox 13 used in the same embodiment, FIG. 4 is a vertical sectional view of the gearbox 13, and FIG. 5A shows the fog lamp lens cover 12 in the fog position. FIG. 5B is a side view when the fog lamp lens cover 12 is in the spot position, and FIG. 6A is a contact state of the fog lens position detection unit 5 when the fog lamp lens cover 12 is in the fog position. FIG. 6B is a diagram showing the contact state of the fog lens position detection unit 5 when the fog lamp lens cover 12 is in the spot position, FIG. 7 is a side view of a conventional auxiliary vehicle headlamp a, Figure 8 is a diagram showing the drive circuit of this vehicle auxiliary headlight a, Figure 9
The figure is a cross-sectional view of the gearbox n of this auxiliary vehicle headlight a. 2... Hand switch, 3... Relay coil for fog, 4... Relay coil for spot, 5... Lens position detection section (fog lens position detection section), 6
...Motor control section (relay contact section for fog), 7
...Motor control section (spot relay contact section),
8...Motor, 36...Light source bulb, 37...Spot condensing lens, 38...Lamp housing.

Claims (1)

[Scope of utility model registration request] a lamp housing; a lens disposed on the front surface of the lamp housing; a light source bulb disposed within a lamp chamber defined by the lens and the lamp housing; An auxiliary vehicle headlight comprising a lens cover attached to a lamp housing via a rotation shaft, the motor rotating the rotation shaft of the lens cover, and a motor interlocking with the rotation shaft. a contact having three rotating contact protrusions;
A fixed section consisting of a third fixed section in which one of the contact protrusions is always in contact and a first and second fixed section in which the other two come into contact with and separate from each other, and a hand switch disposed near the driver's seat of the vehicle. and two relay coils respectively connected between the first and second contacts of the hand switch and the first and second fixed sections, and between the common contact of the hand switch and the third fixed section. The relay coils are switched by a power source connected to the power source and the respective relay coils are energized, and each common contact is connected to a respective terminal of the motor, and each normally closed contact is connected to the negative terminal of the power source. , and a relay contact portion whose normally open contacts are mutually connected to the positive terminal of the power source.