JP2002093218A - Light source bulb of vehicle light - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source bulb of a vehicle light capable of preventing damage to a harness and forming no slide resistance to feed power to a glass bulb by constructing the glass bulb only to slide. SOLUTION: A sliding contact can be formed of a first terminal A fixed to the flange 2 side of a cap and a second terminal B fixed to the slider 7 side, whereby power can be fed to the glass bulb 9 without bending the harness 3. Accordingly, the hardness 3 is not damaged and resistance in sliding the glass bulb 9 is not increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source bulb of a vehicular lamp in which only a glass bulb is slid back and forth to switch between a high beam and a low beam.

[0002]

2. Description of the Related Art HID (High Itensity Discharge)
Is disclosed in Japanese Patent Application Laid-Open No. 2000-404, in order to switch between high beam and low beam with one light source.
As known from Japanese Patent Publication No. 14, it is necessary to slide the light source bulb in the optical axis direction. Specifically, a plate for holding the bulb is provided in the mounting portion of the lamp housing, the plate is urged toward the low beam position by a spring, and the plate is provided outside the lamp housing by a solenoid provided in the high beam position. I'm trying to retreat towards. That is, when the solenoid is turned on, the entire light source bulb retreats to a high beam, and when the solenoid is turned off, the entire light source bulb is advanced by a spring force and switched to a low beam.

[0003]

However, in such prior art, since the entire light source bulb is moved by a solenoid provided outside the lamp housing, the sliding resistance between the light source bulb and the lamp housing is reduced. There is a possibility that the position of the light emitting portion (filament or discharge portion) in the light source bulb changes while moving, and a predetermined light distribution pattern cannot be obtained.

Therefore, it is conceivable to adopt a structure in which only the glass bulb of the light source bulb is slid forward and backward instead of sliding the entire light source bulb back and forth. However, if the harness guided from the outside to the light source bulb is directly connected to the glass bulb inside the light source bulb, the harness is bent every time the glass bulb is slid back and forth, and the harness is deteriorated.
In addition, a large driving force is required to slide the glass tube back and forth while bending the harness, and a power source (a motor, a solenoid, etc.) for driving the glass tube, and a power transmission mechanism thereof. Therefore, the overall size of the vehicular lamp increases. Therefore, there is a need for a proposal of a power supply structure for a glass tube that prevents deterioration of a harness and does not cause slide resistance.

The present invention has been made by paying attention to such a conventional technique. Even if a structure in which only a glass tube is slid is used, the deterioration of the harness can be prevented and the glass tube does not have a sliding resistance. An object of the present invention is to provide a light source bulb of a vehicular lamp capable of supplying power to a sphere.

[0006]

According to the first aspect of the present invention,
A light source bulb of a vehicle lamp having a structure in which a slider to which a glass bulb is fixed is slid forward and backward within a flange of a base attached to a mounting portion based on a standard set in the lamp housing, wherein the base of the base is provided with a flange. A first terminal to which the core wire of the harness is connected, and a second terminal fixed to the side surface of the slider along the front-rear direction, and a part of the first terminal is brought into contact with the second terminal. The conduction state between the first terminal and the second terminal is always maintained.

According to the first aspect of the present invention, the sliding contact can be formed by the first terminal fixed to the collar side of the base and the second terminal fixed to the slider side, so that the glass can be formed without bending the harness. Power can be supplied to the tube. Therefore, the harness does not deteriorate, and the resistance when the glass tube slides does not increase. Therefore,
In order to drive the glass tube, downsize the power source etc.
It can be easily stored in the light source bulb.

According to a second aspect of the present invention, there is provided a case in which a flange of a base is cylindrical, and a case having a space continuous with the base of the base is formed integrally or separately at a rear portion of the base of the base. A driving unit which is connected and slides the slider back and forth is housed.

According to the second aspect of the present invention, since the slider to which the glass tube is fixed is connected to the driving section and directly driven, the position accuracy of the glass tube in the sliding direction is high.

According to a third aspect of the present invention, a glass tube is located in a substantially cylindrical fixed shade fixed to a collar of a base, and an upper portion of the fixed shade is provided upwardly from the glass tube. A notch is formed to allow divergence of light.

According to the third aspect of the present invention, since the fixed shade is fixed to the collar of the base, it is possible to block downward light that is reflected by the lower portion of the reflector and becomes upward glare light.

According to a fourth aspect of the present invention, a movable shade extending forward to above the glass tube is formed above the slider, and light diverging obliquely rearward from the glass tube is blocked with predetermined light distribution characteristics. I do.

According to the fourth aspect of the present invention, since the movable shade which is movable together with the glass tube is formed on the upper portion of the slider, even if the glass tube is slid forward and backward, it diverges obliquely rearward from the glass tube. Light can be always blocked with the same light distribution characteristics. Therefore, it is possible to reliably irradiate light that is reflected from the upper portion of the reflector from the glass tube into a high beam and a low beam in an ideal light distribution pattern.

According to a fifth aspect of the present invention, the flange of the base and the case other than the front portion where the waterproof cap is in close contact and the waterproofness is ensured have a waterproof structure.

According to the fifth aspect of the present invention, since the rear portion of the base of the base and the case which are out of the waterproof area by the waterproof cap and the case are made waterproof, there is no problem even if the drive unit including the electric system is stored in the case. Examples of the waterproof structure include covering the boundary between the base of the base and the case with a waterproof tube, interposing a sealing material or an O-ring at the boundary, and integrating the base of the base with the case.

According to a sixth aspect of the present invention, the driving section is a bidirectional solenoid.

According to the sixth aspect of the present invention, since the driving unit is a bidirectional solenoid and the current application time is short, there is no thermal problem even when housed in the case.

The invention according to claim 7 is a piston in which the driving unit is driven by air or oil inside the case.

According to the seventh aspect of the present invention, since the driving portion is a piston driven in the case, it is electrically free and resistant to moisture and impact. A large sliding amount can be secured, and a larger sliding force than the solenoid can be obtained.

According to the invention described in claim 8, the glass tube is HI.
It is a D type and the standard of the mounting part is H4 compliant.

According to the eighth aspect of the present invention, since the high beam and the low beam can be switched with the light source bulb corresponding to H4, which is highly evaluated in the market, a two-lamp type lamp compatible with H4 can be realized. The HX valve has the same effect without being limited to the H4 valve.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

1 to 7 show a first embodiment of the present invention. This embodiment relates to an automobile headlamp. This headlamp has a structure in which a light source bulb 1 is provided in a lamp housing (not shown) having a lens on a front surface and a reflector R on a rear portion. The light source bulb 1 complies with the H4 standard, and can be directly attached to an H4 standard mounting portion (not shown) provided in the lamp housing.

The light source bulb 1 has a collar 2 of a base having an outer diameter dimension that can be attached to an H4 standard mounting portion. Two harnesses 3 are inserted into the collar 2 of the base from the rear side, and a core wire 4 is exposed at the tip. A first terminal A having an obliquely extending portion is attached inside the core wire 4, and an opening 5 (FIG.
4) is formed, and the core wire 4 and the first terminal A are brought into conduction by the solder injected from the opening 5. Silicon is filled on the solidified solder. Two ridges 6 (FIG. 6) extending in the front-rear direction along the optical axis are formed at the lower portion of the inner surface of the collar 2 of the base.

A slider 7 is inserted into the collar 2 of the base so as to be slidable back and forth. Two grooves 8 are formed on the side surface of the slider 7 along the front-rear direction, and the ridge 6 formed on the inner surface of the collar 2 of the base is engaged with the lower end surface thereof. The engagement between the groove 8 and the ridge 6 prevents rotation of the slider 7 at the collar 2 of the base and prevents the slider 7 from being mounted upside down.

The gap between the groove 8 and the ridge 6 is an air vent. That is, the air vent causes the flange 2 of the base, the casing 14 and the slider 7 to have a high degree of sealing in order to enhance the positional accuracy, and prevents the air inside the base 2 of the base from being pressurized when the slider 7 slides. Air can freely enter and exit to do so.

An HID glass tube 9 is fixed to the front of the slider 7 with cement (adhesive). A power line 10 passes through the center of the glass tube 9, and one light emitting unit 11 is provided in the middle of the power line 10. Power line 10
Is connected to the ground wire 12 at the distal end of the glass tube 9, and the ground wire 12 returns to the base end side.

Second terminals B are attached to opposing positions of the side surface of the slider 7 along the front-rear direction. The terminal of the power supply line 10 is soldered to one second terminal B, and the terminal of the ground wire 12 is soldered to the other second terminal B. Each of the second terminals B has a flat surface along the front-rear direction, and the first terminal A
The part extending inward is in contact.

Around the rear end of the base 2 of the base, a projection 13 is formed at an opposite position, and a hole 15 formed at the front end of the case 14 engages therewith. Mounted. The case 14 has a container shape with a rear end closed, and forms a space continuous with the collar 2 of the base. The harness 3 attached to the collar 2 of the base is
A part of the case 14 also penetrates (see FIG. 4).

A waterproof cap 16 is provided on the side of the base 2 of the base.
The front side is a waterproof area so that water does not enter the glass tube 9 side. Although the rear side of the waterproof cap 16 is not a waterproof area of the waterproof cap 16, the boundary between the base 2 of the base and the case 14 is covered with the waterproof tube 17 from the outside, so that waterproof between the two is maintained. I have. Therefore, water does not enter the collar 2 of the base and the case 14. A solenoid cord hole 18 is formed on the rear surface of the case 14, but water is prevented from penetrating therefrom because it is waterproofed by a waterproof means such as a silicone adhesive or a rubber bush.

Inside the case 14, a solenoid 20 as a "drive unit" is fixed by screws 21. The solenoid 20 is of both types, and each time a current flows, the pin 22 can be alternately switched between a protruding state and a retracted state. After the pin 22 stops, the state is held by an internal magnet. No need to run electricity. Therefore, because it is low power and the time for flowing electricity is short,
The solenoid 20 is not heated in the case 14. Further, as described above, since the waterproof property is maintained by the waterproof tube 17, the internal solenoid 20 is not adversely affected by water.

The tip of the pin 22 of the solenoid 20 is connected to the rear end of the slider 7 by an E-ring 23.
This connection has a “play” that allows the angle of the pin 22 to change, and the driving force of the solenoid 20 is controlled by the slider 7 even if the pin 22 does not always coincide with the optical axis, depending on the mounting condition of the solenoid 20. Can be reliably transmitted to Therefore, by driving the solenoid 20, the glass tube 9 fixed to the slider 7 can be slid back and forth.

At the front of the collar 2 of the base, a substantially cylindrical fixed shade 25 having a large cutout 24 at the top is fixed, and the glass tube bulb 9 is located in the fixed shade 25. . The fixed shade 25 is for blocking downward light that is reflected at the lower part of the reflector R and becomes upward glare light. The cut lines on both sides of the notch 24 are located at the center position as shown in FIG. It is set at a position that is 15 ° lower than.

A movable shade 26 is formed above the slider 7 so as to extend forward to above the glass tube 9. The movable shade 26 is for blocking light diverging obliquely rearward from the glass tube 9 with predetermined light distribution characteristics. Since the movable shade 26 slides together with the glass tube 9, light diverging obliquely rearward from the glass tube 9 can always be shielded with the same light distribution characteristics.

Therefore, if the pin 22 of the solenoid 20 is projected and the slider 7 and the glass bulb 9 are slid forward (FIG. 4), the light reflected at the upper part of the reflector R becomes a low beam, When the slider 22 and the glass tube 9 are slid backward by retracting the tube 22 (FIG. 5), a high beam is obtained. Thus, one light emitting unit 1
Although the glass tube 9 is an HID glass tube having 1, a low-beam and a high-beam can be switched by moving the glass tube 9 back and forth, so that a two-lamp headlamp can be configured. Further, as described above, even when the glass tube 9 is moved back and forth, the light diverging obliquely rearward from the glass tube 9 is always blocked by the movable shade 26 formed on the slider 7 with the same light distribution characteristics. The light reflected from the upper portion of the reflector from the glass tube 9 to become a high beam and a low beam can be reliably irradiated in an ideal light distribution pattern.

As described above, according to the light source bulb 1 of this embodiment, the first terminal A fixed to the flange 2 of the base is provided.
And the second terminal B fixed to the slider 7 forms a sliding contact, so that power can be supplied to the glass tube 9 without bending the harness 3. Therefore, the harness 3 does not deteriorate, and the resistance when the glass tube 9 slides does not increase. Therefore, the size of the solenoid 20 for driving the glass tube 9 can be reduced, and the solenoid 20 can be easily stored in the light source bulb 1.

In addition, since only the glass tube 9 fixed to the slider 7 is slid back and forth inside the light source bulb 1, a large sliding resistance does not occur when the glass tube 9 is slid. The position accuracy of the sphere 9 with respect to the reflector R is high. Further, connecting the slider 7 to which the glass tube 9 is fixed to the solenoid 20 and directly driving the same also contributes to improving the positional accuracy of the glass tube 9 in the sliding direction.

Further, the solenoid 20 for moving the glass tube 9 is small enough to be accommodated in the light source bulb 1, and the head lamp itself is not enlarged. Since the collar 2 of the base is compliant with the H4 standard of the mounting portion, there is no need to change the mounting portion to a nonstandard structure, and the light source bulb 1 of the present embodiment is used as it is in place of an off-the-shelf H4 standard bulb. It can be installed and has high versatility.

Further, since the rear portion of the base 2 of the base and the case 14 which are out of the waterproof area by the waterproof cap 16 are covered with the waterproof tube 17 to have a waterproof structure, the solenoid 14 including the electric system is stored in the case 14. No problem. As the waterproof structure, a sealing material or an O-ring may be interposed at the boundary between the collar 2 of the base and the case 14 instead of the waterproof tube 17.
4 may be integrated to eliminate the boundary.

FIG. 8 is a diagram showing a second embodiment of the present invention. In this embodiment, a hose 27 is connected to the front and rear of the case 14, and a piston 29 as a “drive unit” whose periphery is sealed by an O-ring 28 is housed in the case 14. The case 14 includes a pin 3 of the piston 29.
0 is formed through an O-ring 31. By alternately injecting air or oil from the hose 27 into the space on both sides of the piston 29, the piston 29 is slid back and forth, and the slider 7 connected to the pin 30 of the piston 29 is slid back and forth. It has become.

According to this embodiment, since the piston 29 is slid back and forth by the pressure of air or oil, it is electrically free and resistant to moisture and impact. Further, a larger slide amount and a larger slide force can be obtained than with a solenoid.

The drive unit is not limited to a solenoid or a piston, but may be a motor or any other device as long as it can be housed in the case and can slide the slider reliably in the front-rear direction. Is also good.

[0043]

According to the present invention, since the sliding contact can be formed by the first terminal fixed to the flange side of the base and the second terminal fixed to the slider side, the harness can be formed without bending the harness. Power can be supplied. Therefore, the harness does not deteriorate, and the resistance when the glass tube slides does not increase. Therefore, the power source and the like for driving the glass tube can be reduced in size and easily housed in the light source bulb.

[Brief description of the drawings]

FIG. 1 is a side view showing a light source bulb according to a first embodiment of the present invention.

FIG. 2 is a plan view showing the light source bulb of FIG. 1;

FIG. 3 is a longitudinal sectional view of the light source bulb of FIG. 1;

FIG. 4 is a cross-sectional view of the light source bulb in a state where the glass bulb of FIG. 1 is slid forward.

FIG. 5 is a cross-sectional view of the light source bulb in a state where the glass bulb of FIG. 1 is slid rearward.

FIG. 6 is a cross-sectional view showing an overlapped portion between a collar of a base and a slider.

FIG. 7 is a cross-sectional view of a fixed shade showing a position of a cut line of a notch.

FIG. 8 is a sectional view showing a driving unit of a light source bulb according to a second embodiment.

[Explanation of symbols]

 Reference Signs List 1 light source bulb 2 base flange 3 harness 4 core wire 7 slider 9 glass bulb 11 light emitting section 14 case 16 waterproof cap 17 waterproof tube 20 solenoid (drive section) 25 fixed shade 26 movable shade 29 piston (drive section) A first terminal B Second terminal R Reflector

Claims (8)

[Claims] 1. A light source bulb for a vehicle lamp having a structure in which a slider to which a glass bulb is fixed is slid forward and backward within a flange of a base attached to a mounting portion based on a standard set for an automobile light bulb. A first terminal to which the core wire of the harness is connected is fixed inside the collar of the base, and a second terminal is fixed to the side surface of the slider along the front-rear direction, and a part of the first terminal is fixed. A light source bulb for a vehicular lamp, wherein the light source bulb is brought into contact with a second terminal so that a conduction state between the first terminal and the second terminal is always maintained. 2. The light source bulb for a vehicle lamp according to claim 1, wherein the base of the base has a cylindrical shape, and a case having a space continuous with the base of the base is provided at a rear portion of the base of the base. Formed by the body,
A light source bulb for a vehicular lamp, wherein a drive unit connected to a slider and sliding the slider back and forth is housed in a case. 3. The light source bulb of the vehicle lamp according to claim 1, wherein the glass tube is located in a substantially cylindrical fixed shade fixed to a flange of a base. A light source bulb for a vehicular lamp, wherein a cutout portion is formed at an upper portion of the fixed shade to allow upward divergence of light from a glass bulb. 4. The light source bulb for a vehicle lamp according to claim 3, wherein a movable shade is formed on the upper part of the slider, the movable shade extending forward to above the glass tube, and obliquely rearward from the glass tube. A light source bulb for a vehicle lamp, wherein the diverging light is blocked with predetermined light distribution characteristics. 5. A light source bulb for a vehicle lighting device according to claim 2, wherein a flange and a case of a base other than a front portion where a waterproof cap is adhered and waterproofness is secured. A light source bulb for a vehicular lamp having a waterproof structure. 6. The light source bulb for a vehicle lamp according to claim 2, wherein the drive unit is a two-way solenoid. 7. The light source bulb of the vehicle lamp according to claim 2, wherein the drive unit is a piston driven by air or oil inside the case. Light source bulb for vehicle lighting. 8. The light source bulb for a vehicle lamp according to claim 1, wherein the glass bulb is an HID type, and a standard of a mounting portion is H4 compliant. Light source bulb for vehicle lighting.