JP4010100B2 - Light source bulb for vehicle lamp - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a light source bulb for a vehicular lamp in which only a glass tube is slid back and forth to switch between a high beam and a low beam.
[0002]
[Prior art]
Since HID (High Intensity Discharge) has a single light source, in order to switch between a high beam and a low beam with a single light source, the light source bulb is arranged in the direction of the optical axis as known in Japanese Patent Laid-Open No. 2000-40414. Need to slide in. Specifically, a plate for holding the bulb is provided at the mounting portion of the lamp housing, the plate is biased toward the low beam position by a spring, and the high beam position is provided by a solenoid provided on the outside of the lamp housing. I try to retreat toward That is, when the solenoid is turned on, the entire light source bulb is moved backward to become a high beam, and when the solenoid is turned off, the whole light source bulb is moved forward by the spring force and switched to the low beam.
[0003]
[Problems to be solved by the invention]
However, in such a conventional technique, 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 increased, and the light source is moved during the movement. There is a possibility that the position of the light emitting part (filament or discharge part) in the bulb changes and a predetermined light distribution pattern cannot be obtained.
[0004]
Therefore, it is conceivable to adopt a structure in which only the glass tube bulb is slid back and forth in the light source bulb, instead of sliding the entire light source bulb back and forth. However, if the harness led to the light source bulb from the outside is directly connected to the glass tube bulb in the light source bulb, the harness is bent each time the glass tube bulb is slid back and forth, leading to deterioration of the harness. Moreover, in order to slide the glass tube bulb back and forth while bending the harness, a large driving force is required, and a power source (motor, solenoid, etc.) for driving the glass tube bulb and its power transmission mechanism As a result, the overall size of the vehicular lamp is increased. Therefore, a proposal of a power feeding structure to a glass tube that prevents the deterioration of the harness and does not become a slide resistance is awaited.
[0005]
The present invention has been made by paying attention to such a conventional technique. Even when the structure is such that only the glass tube bulb is slid, deterioration of the harness can be prevented and slide resistance can be prevented. A light source bulb for a vehicular lamp that enables power supply is provided.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a light source bulb for a vehicular lamp having a structure in which a slider to which a glass tube is fixed is slid back and forth in a cap attached to a mounting portion based on a standard set for a lamp housing. And fixing the first terminal to which the core wire of the harness is connected inside the collar of the base, fixing the second terminal along the front-rear direction to the side surface of the slider, and a part of the first terminal. It was made to contact with the 2nd terminal, and the conduction state of the 1st terminal and the 2nd terminal was always maintained.
[0007]
According to the first aspect of 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 glass tube can be bent without bending the harness. Power can be supplied. Therefore, the harness does not deteriorate and the resistance when sliding the glass tube ball does not increase. Therefore, since the glass tube is driven, the power source and the like can be reduced in size and easily stored in the light source bulb.
[0008]
According to the second aspect of the present invention, the case has a cylindrical collar, and a case having a space continuous with the collar of the base is formed integrally or separately at the rear of the collar, and is connected to the slider in the case. A drive unit for sliding the slider back and forth was housed.
[0009]
According to invention of Claim 2, since the slider which fixed the glass tube ball is connected to a drive part and it drives directly, the positional accuracy in the slide direction of a glass tube ball is high.
[0010]
According to a third aspect of the present invention, a glass tube bulb is located in a substantially cylindrical fixed shade fixed to a collar of a base, and light is emitted upward from the glass tube bulb on the fixed shade. A notch that allows the
[0011]
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 part of the reflector and becomes upward glare light.
[0012]
According to a fourth aspect of the present invention, a movable shade extending forward to the upper portion of the glass tube bulb is formed on the upper portion of the slider, and light that diverges obliquely rearward from the glass tube bulb is shielded with a predetermined light distribution characteristic.
[0013]
According to invention of Claim 4, since the movable shade which moves with a glass tube bulb | ball was formed in the upper part of the slider, even if it slides back and forth, the light which diverges diagonally back from a glass tube bulb | ball The light can always be shielded with the same light distribution characteristics. Therefore, it is possible to reliably irradiate light having a high beam and a low beam reflected from the upper portion of the reflector from the glass tube bulb with an ideal light distribution pattern.
[0014]
The invention according to claim 5 waterproofs the cap and case of the base other than the front portion where the waterproof cap is in close contact and the waterproof property is secured.
[0015]
According to the fifth aspect of the present invention, since the rear part of the cap collar and the case that is removed from the waterproof area by the waterproof cap are made waterproof, there is no problem even if the drive part including the electric system is accommodated in the case. As a waterproof structure, the boundary portion between the base collar and the case may be covered with a waterproof tube, a sealing material or an O-ring may be provided on the boundary portion, and the base collar and the case may be integrated.
[0016]
In the invention described in claim 6, the drive unit is a bidirectional solenoid.
[0017]
According to the sixth aspect of the present invention, since the driving unit is a bidirectional solenoid and the current application time is short, no thermal problem arises even if it is housed in the case.
[0018]
The invention according to claim 7 is a piston in which the drive unit is driven by air or oil inside the case.
[0019]
According to the seventh aspect of the invention, since the drive unit is a piston that is driven in the case, it is electrically free and resistant to moisture and impact. A large sliding amount can be secured, and a sliding force larger than that of the solenoid can be obtained.
[0020]
In the invention according to claim 8, the glass tube bulb is HID type, and the standard of the mounting portion is H4 compatible.
[0021]
According to the eighth aspect of the present invention, a high beam and a low beam can be switched with a light source bulb compatible with H4, which is highly evaluated in the market, so that a two-lamp type lamp can be realized with H4. The HX valve has the same effect without being limited to the H4 valve.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
[0023]
1 to 7 are views showing 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 the front surface and a reflector R at the rear. The light source bulb 1 corresponds to the H4 standard, and can be attached as it is to a not-shown mounting part of the H4 standard provided in the lamp housing.
[0024]
The light source bulb 1 includes a cap collar 2 having an outer diameter dimension that can be attached to an H4 standard mounting portion. Two harnesses 3 are inserted from the rear side into the flange 2 of the base, and the core wire 4 is exposed at the tip. A first terminal A having an obliquely extending portion is attached to the inner side of the core wire 4, and an opening 5 (FIGS. 1 and 4) is formed in the collar 2 on the upper side of the core wire 4. With the solder, the core wire 4 and the first terminal A are brought into conduction. Silicon is filled on the solidified solder. And two protrusion 6 (FIG. 6) extended in the front-back direction along an optical axis is formed in the inner surface lower part of the collar 2 of this nozzle | cap | die.
[0025]
A slider 7 is inserted into the base 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 a protrusion 6 formed on the inner surface of the flange 2 of the base is engaged with the lower end surface thereof. The engagement between the groove 8 and the protrusion 6 prevents rotation of the base of the slider 7 at the flange 2 and prevents the slider 7 from being installed upside down.
[0026]
A gap between the groove 8 and the protrusion 6 is an air vent. In other words, the air vent causes the base collar 2 and the case 14 and the slider 7 to have a high degree of sealing in order to increase positional accuracy, and prevents the air inside the base collar 2 from becoming high when the slider 7 slides. Air can freely enter and exit.
[0027]
An HID glass tube 9 is fixed to the front portion of the slider 7 with cement (adhesive). A power supply line 10 passes through the center of the glass tube bulb 9, and one light emitting unit 11 is provided in the middle thereof. The power line 10 is connected to the ground wire 12 at the tip of the glass tube bulb 9, and the ground wire 12 returns to the base end side.
[0028]
Second terminals B are attached to the 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 a portion extending inward of the first terminal A is in contact with the surface.
[0029]
A protrusion 13 is formed at the opposite position around the rear end of the base collar 2, and a hole 15 formed at the front end of the case 14 is engaged therewith, and the case 14 is attached to the base collar 2. Yes. The case 14 has a container shape with a closed rear end, and forms a space continuous with the collar 2 of the base. Incidentally, the harness 3 attached to the collar 2 of the base also penetrates a part of the case 14 (see FIG. 4).
[0030]
A waterproof cap 16 is in close contact with the side surface of the collar 2 of the base, and its front side is a waterproof area so that water does not enter the glass tube 9 side. The rear side of the waterproof cap 16 is not a waterproof area by the waterproof cap 16, but the boundary between the base 2 and the case 14 is covered with a waterproof tube 17 from the outside, so that the waterproofness between the two is maintained. Yes. Therefore, water does not enter the base 2 and the case 14. A solenoid cord hole 18 is formed on the rear surface of the case 14. However, since the cord 14 is waterproofed by a waterproof means such as a silicon adhesive or a rubber bush, water does not enter from here.
[0031]
Inside the case 14, a solenoid 20 as a “drive unit” is fixed by a screw 21. The solenoid 20 is of both types, and each time an electric current is applied, the pin 22 can be switched between a protruding state and a retracted state. After the pin 22 stops, the state is maintained by an internal magnet. There is no need to pass electricity. Therefore, the solenoid 20 is not heated in the case 14 because the electric power is applied and the time for supplying electricity is short. 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.
[0032]
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 “play” that allows the angle change of the pin 22, and the driving force of the solenoid 20 is controlled by the slider 7 even if the pin 22 does not necessarily coincide with the optical axis due to the mounting state of the solenoid 20. Can be reliably transmitted to. Therefore, the glass tube 9 fixed to the slider 7 can be slid back and forth by driving the solenoid 20.
[0033]
A substantially cylindrical fixed shade 25 having a large notch 24 at the top is fixed to the front portion of the collar 2 of the base, and the glass tube 9 is located in the fixed shade 25. The fixed shade 25 is for blocking downward light that is reflected by the lower part of the reflector R and becomes upward glare light, and the cut lines on both sides of the notch 24 are arranged at the center position as shown in FIG. It is set at a position that is lowered by 15 °.
[0034]
In addition, a movable shade 26 extending forward to the upper side of the glass tube bulb 9 is formed on the upper portion of the slider 7. The movable shade 26 is for shielding light diverging obliquely backward from the glass tube bulb 9 with a predetermined light distribution characteristic. Since the movable shade 26 slides together with the glass tube bulb 9, light that diverges obliquely backward from the glass tube bulb 9 can always be shielded with the same light distribution characteristics.
[0035]
Therefore, if the pin 22 of the solenoid 20 is protruded and the slider 7 and the glass tube 9 are slid forward (FIG. 4), the light reflected from the upper part of the reflector R becomes a low beam, and the pin 22 is retracted. If the slider 7 and the glass tube bulb 9 are slid rearward (FIG. 5), a high beam is obtained. Thus, although it is the HID glass tube bulb 9 having one light emitting part 11, the low beam and the high beam can be switched by moving it back and forth, so that a two-lamp headlamp can be configured. In addition, as described above, the movable shade 26 formed on the slider 7 always blocks the light emitted from the glass tube bulb 9 obliquely rearward with the same light distribution characteristics even when the glass tube bulb 9 is moved back and forth. The light that is reflected from the glass tube bulb 9 at the upper part of the reflector to become a high beam and a low beam can be reliably irradiated with an ideal light distribution pattern.
[0036]
As described above, according to the light source bulb 1 according to this embodiment, the sliding contact is formed by the first terminal A fixed to the flange 2 side of the base and the second terminal B fixed to the slider 7 side. It is possible to supply power to the glass tube bulb 9 without bending 3. Therefore, the harness 3 does not deteriorate, and the resistance when the glass tube ball 9 is slid does not increase. Therefore, the solenoid 20 can be reduced in size to drive the glass tube bulb 9 and can be easily housed in the light source bulb 1.
[0037]
Further, since only the glass tube bulb 9 fixed to the slider 7 is slid back and forth inside the light source bulb 1, no large sliding resistance is generated when the glass tube bulb 9 is slid. Position accuracy with respect to the reflector R is high. Further, connecting the slider 7 with the glass tube bulb 9 fixed to the solenoid 20 and directly driving it also contributes to improving the positional accuracy of the glass tube bulb 9 in the sliding direction.
[0038]
Further, the solenoid 20 for moving the glass tube 9 is small enough to be housed in the light source bulb 1, and the headlamp itself is not increased in size. Since the collar 2 of the base corresponds to the H4 standard of the mounting part, it is not necessary to change the mounting part to a non-standard structure. Instead of the off-the-shelf H4 standard bulb, the light source bulb 1 of this embodiment is used as it is. It can be installed and is highly versatile.
[0039]
In addition, since the rear portion of the cap 2 and the case 14 that is removed from the waterproof area by the waterproof cap 16 are covered with the waterproof tube 17 to form a waterproof structure, there is no problem even if the solenoid 20 including the electric system is accommodated in the case 14. . As a waterproof structure, instead of the waterproof tube 17, a sealing material or an O-ring may be interposed at the boundary between the base collar 2 and the case 14, and the base collar 2 and the case 14 are integrated, You may make it eliminate a boundary part.
[0040]
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 peripheral edge is sealed by an O-ring 28 is accommodated in the case 14. The case 14 is formed with a front wall portion 32 that penetrates the pin 30 of the piston 29 through an O-ring 31. Then, by alternately injecting air or oil into the space on both sides of the piston 29 from the hose 27, 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 is like that.
[0041]
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. In addition, a larger sliding amount and a larger sliding force can be obtained than the solenoid.
[0042]
The drive unit is not limited to a solenoid or a piston, and may be a motor or the like as long as it can be housed in a case and can slide the slider in the front-rear direction.
[0043]
【The invention's effect】
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, power can be supplied to the glass tube bulb without bending the harness. . Therefore, the harness does not deteriorate and the resistance when sliding the glass tube ball does not increase. Accordingly, the power source and the like are reduced in size to drive the glass tube and can be easily accommodated 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.
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.
4 is a cross-sectional view of the light source bulb in a state where the glass tube bulb of FIG. 1 is slid forward.
5 is a cross-sectional view of the light source bulb in a state where the glass tube of FIG. 1 is slid rearward.
FIG. 6 is a cross-sectional view showing an overlapped portion of a cap collar and a slider.
FIG. 7 is a cross-sectional view of a fixed shade showing the position of a cut line at a notch.
FIG. 8 is a cross-sectional view showing a drive unit of a light source bulb according to a second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Light source valve | bulb 2 Cap | hook 3 Harness 4 Core wire 7 Slider 9 Glass tube 11 Light emission part 14 Case 16 Waterproof cap 17 Waterproof tube 20 Solenoid (driving part)
25 fixed shade 26 movable shade 29 piston (drive part)
A 1st terminal B 2nd terminal R Reflector

Claims (8)

A light source bulb for a vehicular lamp having a structure in which a slider to which a glass tube is fixed is slid back and forth in a cap attached to a mounting portion based on a standard set for a light source bulb for an automobile,
A first terminal connected to the harness core wire 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 a second terminal. A light source bulb for a vehicular lamp characterized in that the electrical connection between the first terminal and the second terminal is always maintained by contacting the first and second terminals. A light source bulb for a vehicular lamp according to claim 1,
The base collar is cylindrical, and a case having a space continuous with the collar collar is formed at the rear of the base collar as a single body or as a separate body, and is connected to a slider in the case to slide the slider back and forth. A light source bulb for a vehicular lamp characterized by containing a drive unit. A light source bulb for a vehicular lamp according to claim 1 or 2,
The glass tube bulb is located in a substantially cylindrical fixed shade fixed to the base of the base, and a cutout portion that allows light to diverge upward from the glass tube bulb is provided on the upper portion of the fixed shade. A light source bulb for a vehicular lamp characterized by being formed. A light source bulb for a vehicular lamp according to claim 3,
A vehicular lamp characterized in that a movable shade extending forward to the upper portion of the glass tube bulb is formed on an upper portion of the slider, and light diverging obliquely backward from the glass tube bulb is shielded with a predetermined light distribution characteristic. Light source bulb. A light source bulb for a vehicular lamp according to any one of claims 2 to 4,
A light source bulb for a vehicular lamp characterized in that a cap collar and a case other than a front portion where a waterproof cap is in close contact and water resistance is secured are waterproof. A light source bulb for a vehicle lamp according to any one of claims 2 to 5,
A light source bulb for a vehicular lamp, wherein the drive unit is a bidirectional solenoid. A light source bulb for a vehicle lamp according to any one of claims 2 to 5,
A light source bulb for a vehicular lamp, wherein the drive unit is a piston that is driven by air or oil inside the case. A light source bulb for a vehicular lamp according to any one of claims 1 to 7,
A light bulb for a vehicular lamp characterized in that the glass tube bulb is of the HID type and the mounting part standard is H4 compatible.

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