JPS63184537A - Brake lamp device for vehicle - Google Patents

Abstract

PURPOSE:To prevent any traffic accident before it happens, by enabling an emergency braking action of a preceding vehicle to be sensed immediately by a following vehicle so that it can take its reaction promptly, by means of provision of a brake lamp on the preceding vehicle, while the display method thereof changes in response to the speed of stepping on the brake pedal. CONSTITUTION:When a brake pedal 17 is stepped on, a limit switch LS5a is closed, at first, to turn on lamps 3 and 4 and a LS14a is also closed following this. At this time, the output of a OR gate 16 which takes the logical sum of the signals from the LS5a and LS14a is integrated by a integrator 17 and compared the integrated value reference level by a comparator 18, however, no output from the comparator 18 is generated owing to slow stepping speed at the time of ordinary braking operation, and a relay switch 13 is maintained in OFF condition. On the contrary, an output is generated from the comparator due to quick stepping speed at the time of emergency braking operation, a transistor 19 is turned on to actuate the relay switch 13, and flash lamps 9 and 10 are lighted at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a brake light device for +li- vehicles that particularly improves the safety of vehicles.

(Prior Art) FIG. 5 is a diagram showing a circuit configuration of a conventional brake light device for a vehicle. In the figure, 1.2 is the lamp housing No. 1 on the left, and a lamp 3.4, which is the same as an incandescent light bulb, is housed in this housing as a brake light. These lamps 3.4 are connected in parallel with each other and ? Flaming limit switch contact 5a
It is connected to the battery 6 via.

FIG. 6 is a block diagram showing the braking system of both brake systems, and as shown, the arm 7a of the brake pedal 7 is connected to the master cylinder 8. Also, the limit switch 5 mentioned above is provided, and the brake pedal 7, the lever is pushed by the arm 7a, and the contact 5a interposed between a and b in FIG. 5 is turned on.

There is a slight play in the stroke of the brake pedal 7 shown in Figure 1n6, and when the brake pedal 7 is depressed beyond this play, the stop switch 5 is activated and the contact 5a is turned on. The voltage of the battery 6 is now applied to the lamp 3.4 through the contact 5a, and the lamp 3.
．． 4 lights up. The lighting state of this lamp 3.4 remains constant regardless of the depression force of the brake pedal 7. and,
When the brake pedal 7 is released, the contact 5a of the limit switch 5 is turned off, and the lamp 3.4 is turned off.

(Problems to be Solved by the Invention) The conventional brake light device is configured as described above, and has three lamps.
Since the lighting condition of No. 4 is constant, the following vehicle will be able to see the leading No. 11 (
It is not immediately possible to determine whether the brake is a normal brake or an emergency brake, and the driver must look over the river ahead to check the surrounding situation. Therefore, the response measures of the following vehicle may be delayed, resulting in a problem that the safety of both occupants is low.

This invention was made to solve these problems [1], and it is possible to immediately judge the emergency braking of the preceding 11 tons, allowing the following vehicles to take appropriate action, and ensuring a high level of safety for the passengers. The present invention provides a brake light device for both φ.

[Step F for solving problems]

The +1 car brake light device of the present invention is equipped with a brake light whose display method changes depending on the depression speed of the brake pedal.

(Function) The display method of the All dynamic lights changes according to the speed at which the brake pedal is depressed, so when the brake pedal is strongly depressed in an emergency, the following east side can judge it as 1!II.

〔Example〕

Eye 1. FIG. 2 is a diagram showing an embodiment of the present invention, FIG. 1 is a circuit configuration diagram, and FIG. 2 is a configuration diagram of an eleventh dynamic system. In the figure, 1.2 is the left/r lamp housing, which includes a normal lamp 3.4 as well as a display system (11 lighting types).
It contains flash lamps 9.10 containing different amounts of xenon or other inert scum. These flash lamps 9 and IO are each lit by a drive circuit 11.12, and each drive circuit 11.12 is connected to the battery 6 via a relay switch 13 that is activated when the emergency brake is depressed. A limit switch 14 for detecting an emergency brake is provided, and this limit switch 1
4 is attached at a position where the lever contacts a metal fitting 15 fixed to a bushing rod of the mask cylinder 8, and is activated after the limit switch 5 is activated when the accelerator pedal 7 is depressed.

FIG. 3 shows a drive circuit for the relay switch 13 mentioned above. This circuit consists of an OR gate 16. to which the contacts 5a and 14a of a limit switch 5.14 are connected to the input terminals. N divider 17. Comparison vj18. and a driving section 19, and the limit switch 13 is controlled by turning on and off a transistor Q provided in the driving section 19. Further, the comparator 18 is configured to be able to compare the output level of the integrator 17 with a predetermined reference level.

Next, the operation will be explained. During normal brake operation, such as when stopping at a traffic light, the brake pedal 7 is depressed more slowly than in an emergency. At this time, first limit switch 5
is activated, current from the battery 6 flows to the lamp 3.4 through its contact 5a, and the lamp 3.4 lights up. Next, the limit switch 14 is activated by the metal fitting 15, but since the depressing speed of the brake pedal 7 is slow at this time, the limit switch 14 is activated after the limit switch 5 is activated, as shown in FIG. 4(a). There is a certain amount of time difference T1.

Figure 4 shows the activation timing of the garbage limit switch 5.14 during normal brake operation and emergency brake operation, and shows the two human power sections (A) and (B) of the or gate 16 in Figure 3. The output waveform of is shown. For this reason, each contact 5a.

After the output of the OR gate 16 which takes the logical sum of the signals from the signals from 14a is integrated by the h1 divider 17, when it is compared with the reference level by the comparator 18, it does not become lower than the reference level due to the above-mentioned time difference Tl. The transistor Q of the drive unit 19 is not turned on, and the relay switch 13 is not activated.

On the other hand, when the brake is applied in an emergency, the brake pedal 7 is depressed at a high speed, so as shown in FIG. The time difference T2 is very short. Therefore, the output of the integrator 17 becomes higher than that during the normal brake operation described above, and if the J^ quasi-level of the comparison number 18 is set lower than the output of the integrator '317 at this time, the output of the drive unit 19 The relay switch 13 is actuated, and each drive circuit 11.12 activates the flash lamp 9.
．． 10 lights up. Therefore, the driver of the following vehicle can see that the flash lamp 9.10 is lit and know that the first vehicle ahead has applied emergency braking, and by responding immediately, the safety of both drivers can be ensured. be done.

In this way, in case of emergency braking, the normal lamp 3.4
Since this display and the display using other flash lamps 9 and 10 having different display methods are used in combination 9, it is possible to prevent delays in countermeasures on the side of the following vehicle.

In the above embodiment, the braking display is performed in two stages using the normal lamp 3.4 and the flash lamp 9.10, but the display may be performed in three or more stages, or the display may be performed using a large number of lamps. It is also possible to use light emitting diodes that emit light of different colors in place of the lamp.

(Effects of the Invention) As explained above, according to the present invention, since the brake light that changes in Table t'jc 11 according to the depression speed of the brake pedal is provided, it is possible to immediately determine whether to use the emergency brake for the preceding vehicle. , and therefore the corresponding action during the subsequent one is l,j (
, the effect of increasing the safety of (1) is fJ.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing an embodiment of the present invention, Fig. 2 is a block diagram of its braking system, Fig. 3 is a circuit diagram showing a drive circuit for the relay switch of Fig. 1, and Fig. 41g(a). ,(b)
5 is a diagram showing the operation timing of each limit switch in normal and emergency situations, FIG. 5 is a circuit configuration diagram of the conventional device, and FIG. 6 is a configuration diagram of its braking system. 3.4... Lamp (brake light) 5,! 4.
・・・・・・Limit switch 7・・・・・・・・・・・・
...Brake lamp 9.10-1 Flash lamp (II Brake light 13...-1 Relay switch Applicant Stanley Electric Co., Ltd. Figure 1 9.10: Flash lamp (Tomo 1-1 Sufumiko) 7: Bray Yako Yururu No. 3 Infue 4 (C1) (b) Figure 5 Figure 6

Claims (4)

[Claims] (1) A brake light device for a vehicle characterized by comprising a brake light whose display method changes depending on the depression speed of the brake pedal. (2) The brake light device for a vehicle according to claim 1, wherein the display method of the brake light changes in a plurality of stages depending on the depression speed. (3) The brake light device for a vehicle according to claim 1 or 2, wherein the brake light is comprised of a plurality of lamps with different lighting methods. (4) The brake light device for a vehicle according to claim 1 or 2, wherein the brake light is a light emitting diode that emits light of different colors.