JPS6224304B2 - - Google Patents

Description

[Detailed Description of the Invention] When the vehicle is stopped by applying the brakes, an electromagnet is activated to hold (lock) the brake system,
Braking devices are known in which the brake remains locked until the next time the brake pedal is depressed or the accelerator pedal is depressed. In such a braking device, if the driver leaves the vehicle overly trusting that the electromagnet will hold the brake, there is a risk that if the battery wears out and the electromagnet is no longer energized, the brake may come off and create a dangerous situation. There is. Therefore, a braking device has been invented which sounds a buzzer and gives a warning if the driver's door is opened without pulling the handbrake while the brake is locked using an electromagnet.

The purpose of this invention is to propose a warning device that can also warn of forgetting to turn off the key switch by utilizing the buzzer that warns about forgetting to turn off the handbrake.

That is, the present invention provides an oscillator that operates by receiving power directly from a battery without going through a key switch to sound the buzzer in a vehicle equipped with a means for sounding a buzzer when the door is opened without applying the handbrake. and a door switch that activates this oscillator when the door is opened.
There is a handbrake switch that disables this oscillator when the handbrake is applied, and a key switch that is connected between the battery and the oscillator and changes the oscillation frequency of the oscillator depending on whether the key switch is on or off. This is characterized by the provision of means for giving different effects.

Next, a description will be given based on the embodiments shown in the drawings.

In FIG. 1, 1 is a brake pedal, 2 is a brake lever, and 3 is a swinging fulcrum of the brake lever 2, which is fixed to the floor of the vehicle. 4 is a connecting member that transmits the movement of the brake lever 2 to a brake master cylinder (not shown); 5 is a mounting plate fixed to the vehicle body; 6 is an arm that can swing around a pin 7 fixed to the mounting plate 5; It is connected to a member 9 via a pin 8 fixed to its movable end 6a. The member 9 has a deformed hole 9a, into which the pin 8 is fitted, and is always biased to one side by a compression spring S as shown in FIG. Another member 10 is welded to the member 9, and a plate 12 is fixed to the connecting rod 11 with a nut 13 so as to sandwich the brake lever 2 therebetween. An actuator 14a of a micro switch 14 fixed to another movable end 6b of the arm 6 is engaged with the front end 9b of the member 9, and the member 9 and the pin 8
When Q1 is in the position shown in FIG. 2, the switching contact of the microswitch 14 is on the a side as shown in FIG. 5, and the base of the transistor _Q1 is a diode.
D ₁ is connected to one end of a microswitch 15, which will be described later, via the a contact of the microswitch 14. When the brake pedal 1 is depressed, the brake lever 2 moves in the direction of arrow A, and the member 9 is moved in the direction of A. At this time, if the electromagnet 20, which will be described later, is not energized, the compression spring S remains in the state shown in FIG.
moves pin 8 in direction A via compression spring S,
The movable end (left end) of the arm 6 is pulled in the direction A, and the arm 6 swings clockwise around the pin 7. 6c
The micro switch 15 is set so that when the brake pedal 1 is normally depressed to the extent that the brake is applied by the convex portion of the cam surface provided on the arm 6, the micro switch 15 engages with the concave portion 6d of the cam surface and closes. 6e is another convex portion on the cam surface provided on the arm 6, and is set so that the micro switch 16 is opened again when the brake pedal is fully depressed. 6f is a rack-like tooth carved into the arm 6 and meshes with a pinion 19 fixed to a circular suction plate 18 that can rotate around the shaft 17, and when the brake pedal is depressed, the arm 6 moves around the pin 7. It swings clockwise to rotate the suction plate 18 clockwise around the shaft 17. 20 is an electromagnet having a solenoid provided concentrically with the shaft 17;
It has a cylindrical iron case with a bottom fixed to it, and the end face of the case constitutes a magnetic pole face facing the adsorption plate 18. The suction plate 18 rotates while sliding on this magnetic pole surface. When the brake pedal 1 is depressed, the adsorption plate 18 rotates by an amount corresponding to the amount of depression, but when the electromagnet 20 is operated in this state, the adsorption plate 18 is attracted to the magnetic pole face of the electromagnet case and fixed. The arm 6 is then fixed in that position, the brake lever is held in that position, and the brake remains applied even if the brake pedal is released. In addition, the gap between the brake lever 2 and the connecting rod 11 and the gap between the connecting rod 11 and the member 10 are set to be extremely small, so that when the brake pedal is released from the brake pedal after the brake is applied and held (locked). The return of the brake due to backlash is kept to a level that does not pose a practical problem.

As shown in FIG. 3, a swing sensor 23 for detecting the swing of the brake lever is attached to the arm 6 through two screws 2.
It is installed by 2. This sensor 23 is the fourth
As shown in the figure, a fixed electrode 25 having a circular hole is fitted into a frame 24 made of synthetic resin, and a cylindrical metal weight 26 with a bottom is suspended by a coil spring 27 at the center of the circular hole. 28 is coil spring 2
This metal fitting holds the upper end of the frame 7 and is fixedly attached to the arm 6 together with the frame 24 using the screw 22. The coil spring 27 is set to have such rigidity that the weight 26 does not come into contact with the fixed electrode 25 when the vehicle is on a slope such as a slope. In addition, the coil spring 27 and the weight 2
Although the center line of 6 is parallel to the axis 7, it is provided eccentrically from the axis 7.

In FIG. 5, 21 is a switch that is linked to the accelerator pedal of the vehicle, which closes when the foot is removed from the accelerator pedal and opens when the foot is depressed. 21a is a switch that is linked to the clutch pedal and is closed when the clutch pedal is depressed. When the key switch _S1 is turned now, voltage is supplied from the battery E, and when the foot is removed from the accelerator and brake pedals, the switch 15 is opened and the switch 21 is closed as shown. S ₂ is the main switch of the braking system. Now close this Switch S ₂ as well. 29 is a timer, and when transistor Q ₄ becomes conductive, capacitor C ₄ is charged through resistor R ₄ and transistor Q ₅
becomes conductive, and point (d) becomes zero potential. And after the transistor Q ₄ is in the cut-off state, the capacitor C ₄
The charge of transistor _Q5 is passed through variable resistor VR
This state is maintained for about 1.5 seconds while the capacitor C4 is discharged to the base of the capacitor _C4 , and when the discharge of the charge in the capacitor C4 is completed, an output voltage is generated at point (d) and operates to make the transistor _Q6 conductive. That is, timer 29
is a certain period of time (approximately 1.5 seconds) after the input signal disappears.
seconds) will produce an output. 30 is a permanent magnet that rotates in conjunction with the axle of the vehicle, and a reed switch 31 is placed close to it, and this reed switch 31 is turned on and off while the vehicle is running. Reference numerals 32 and 33 are pulse oscillators (astable multivibrators) using Mitsubishi Electric's timer IC M51841P (see Figure 7) with a known circuit configuration.

When you take your foot off the accelerator pedal while the vehicle is running, the switch 21 closes as shown, and the ground line C of the timer 28, transistors _Q1 to _Q3 , pulse oscillator 32, etc. is connected to the diode _D2 and the main switch.
S ₂ is grounded via a switch 21 that is linked to the accelerator. Therefore, the pulse oscillator 32 is activated,
The output pulse is applied to the base of transistor Q ₄ of timer 29 via capacitor C ₂ .
At the same time, a pulse from a speed sensor composed of a permanent magnet 30 and a reed switch 31 is applied to the base of a transistor _Q4 via a transistor _Q3 and a capacitor _C1 . Therefore, the output point d of the timer 29 becomes low level. Next, when the brake pedal is normally depressed to stop the motor, the micro switch 15 closes and the 4th pin, which is the reset terminal of the IC (IC ₁ ), is grounded, so the pulse oscillator 32 stops. At this time, since the swing sensor 23 moves in conjunction with the brake lever, its weight 26 vibrates in cooperation with the coil spring 27 and repeatedly collides with the fixed electrode 25. In other words, the swing sensor 23 is activated intermittently due to the swing of the brake lever. This intermittent pulse is applied to the base of the transistor _Q4 via the capacitor _C3 , and the output point d of the timer 28 becomes low level. When the vehicle decelerates and stops, the reed switch 31 of the speed sensor stops intermittent, and then the rocking sensor 23 stops intermittent, so for a certain period of time (approximately
After 1.5 seconds), the voltage at the output point d of the timer 29 becomes high level, the transistor _Q6 becomes conductive, the relay _K1 is activated, and its contacts are switched from the state shown. Note that when you take your foot off the accelerator pedal and press the brake pedal, relay _K2 is activated and is in a self-holding state by its self-holding contact _k2 , so another switching of relay _K2 is required. Contact k ₂ ' is also in a switched state from the state shown. Therefore, when relay K ₁ is activated, the switching contact
An excitation current flows through the coil 20a of the electromagnet 20 through k ₂ ', and the brake is kept applied and locked. At this time, the light emitting diode LED ₁ lights up to indicate to the driver that the brakes are locked. Note that LED ₂ is a light emitting diode for power display.

In this way, when the relay _K1 is activated after the vehicle has stopped and an exciting current flows through the coil 20a of the electromagnet 20, the brake is locked, but at the same time the transistor
Since Q ₂ conducts and cuts off transistor Q ₃ ,
Disable the reed switch 31 of the speed sensor. This means that in the case of a rear-end collision while the vehicle is stopped with the brakes locked, the vehicle shakes or moves forward, and a pulse from the speed sensor is applied to the timer 29, which triggers the relay _K1 . This is useful for preventing a problem in which the brake is unlocked due to the electromagnet 20 being de-energized when the brake is restored. To release the brake lock, simply press the brake pedal more or less. When the brake pedal 1 is depressed slightly, the member 9 shown in FIG. 2 is pulled in the direction A. At this time, the electromagnet 20 is operating and the pin 8 is stopped, so when the member 9 moves in the direction A, the compression spring S is compressed first. The contact point of the microswitch 14 is set to switch from a to b in FIG. 3 when the compression spring S is compressed to about half of the gap X. When switched to b, transistor Q ₁ becomes conductive and base current flows to transistor Q ₄ via resistor R ₁ .
The microswitch 14 grounds the output point d of the timer 29 and sets it to low level. Micro switch 1
4 sets the input of the timer 29 to a low level and the output point of the timer 28 to a low level to turn off the electromagnet 20 at the moment of switching, thereby providing redundancy to the circuit and improving the reliability of the system.

Furthermore, a sensor 23 detects the swinging of the brake lever.
is detected and provides a pulse input to the timer 28, further improving the redundancy of the entire system. When the brake pedal 1 is pressed down, the micro switch 14 is switched as described above, and the pulse from the rocking sensor 23 is input to the timer 29.
Transistor Q ₄ becomes conductive and transistor Q ₆ is cut off, so that electromagnet 20 becomes de-energized and the brake lock (holding) is released. Electromagnet 2
0 becomes de-energized, the compression spring S returns to the state shown in FIG. 2, and the microswitch 14 also returns to the state shown in FIG. You can press the brake further or take your foot off the brake pedal to release the brake.

In addition, when there is a great danger, pressing the brake firmly will open the micro switch 15 and activate the relay.
Since _K1 is restored and the electromagnet 20 is de-energized, the brake is unlocked, so it is safe.

When the door of the vehicle is opened and the door switch 34 is closed, the pulse oscillator 33 starts oscillating as the No. 1 pin (ground terminal) of the IC (IC ₂ ) is grounded via the diode D ₃ and the buzzer 35 sounds. The IC that constitutes the pulse oscillator 33 is a well-known Mitsubishi Electric product.
M51841P (or for Signateix timer)
The internal structure is shown in the block diagram in Figure 7. 7 of this timer IC
The number pin (discharge terminal) is connected to one end of the handbrake switch 35 and to the key switch _S1 via the diode _D4 and the handbrake lamp 36, as shown.

Now pull the handbrake and _{turn the} handbrake switch _S5 .
The 7th pin (discharge terminal) of is grounded. Therefore,
The voltage at pin 7 drops. At this time, if you set the resistance value so that the voltage obtained by dividing the voltage of power supply E by resistor R _A R ₂ is lower than the reference voltage inside the IC (voltage at pin 5), the handbrake will be applied. , oscillation stops. When the door is closed, the door switch 34 opens and the oscillation also stops. If you forget to pull the handbrake and open the door, oscillation will start, but the oscillation frequency at this time will be ₁ ≒ 1.44/(R _A + 2R _B ) C if key switch S ₁ is not closed, and key switch S ₁ will be When it is closed, the sum R' of the resistance value of the handbrake lamp 36 and the value of the resistor _R2 is connected in parallel with the resistor R _A , so the parallel resistance value of R _A and R' is R _A R′, then the oscillation frequency ₂ is ₁ ≒ 1.44/(R _A R′2R _B )C, which is higher than ₁ , and C is the capacitance of the capacitor connected between pin 2 and pin 1. It is. In this way, if you forget to use the handbrake and try to leave the vehicle, the warning buzzer 35 will sound, but since the pitch of the sound is different depending on whether the key switch is closed or open, it is easy to forget to remove the key. can be noticed.

S ₃ is a lamp switch for lighting the head lamp, S ₄
is the daymer switch, 37 is the license lamp,
38 is a tail lamp, and 39 is a head lamp.

Now, if you take your foot off the accelerator while driving and apply the brakes to stop, as mentioned above, after about 1.5 seconds, the output point d of timer 29 becomes high level, transistor Q ₆ becomes conductive, and relay K ₂ is activated. But,
At this time, relay _K3 is activated and its own contacts are activated.
Self-maintained by k ₃ . Therefore, an exciting current flows through the coil of the relay K ₅ through the contact k ₃ ′, and the relay K ₅ is operated to extinguish the lamp 39. night,
If the distance to the vehicle in front is short and the vehicle follows slowly,
In particular, torque converter cars (automatic cars) may use creep to repeatedly stop and move forward simply by pressing the brake pedal while taking their foot off the accelerator pedal. Repeated depending on activation and recovery of _K1 . In conventional vehicles, where the headlights are linked to turn off when the brakes are held, when the vehicle uses creep to repeatedly stop and move forward, the headlights repeatedly turn off and on each time, giving a signal to the driver of the vehicle in front. There was an inconvenience that led to the misunderstanding that there was no one there. In this one, relay K ₁ is actuated to hold the brake, and at the same time relay K ₃ is activated via contact k ₂ ′ of relay K ₂ , which is already self-holding.
Current flows through the coil, and contact _k3 switches and is self-held. Then, an exciting current flows through the relay _K5 through the contact _k3 ' and the relay K5 is activated, and the headlamp 39 is turned off. In this state, if switches _S5 and _S6 remain closed, relay _K3 will self-hold regardless of brake operation, and the headlight will continue to go out. Next, when the accelerator pedal is depressed, switch 21 opens and the self-holding circuit of relay _K3 is cut off and restored, relay _K5 is also restored, and the head lamp lights up. In this way, the inconvenient blinking of the headlights is prevented when the vehicle repeatedly stops and moves forward in small increments without pressing the accelerator. In addition, if the purpose is to prevent flashing when repeatedly stopping and moving forward, relay K ₄ and switches S ₅ and S ₆ are not necessarily necessary, and the lower end (in the drawing) of the coil of relay K ₃ It can be connected directly to the anode of diode _D2 .

In the embodiment shown in FIG. 6, the output of the pulse oscillator 32 (pin 3) is connected to the fixed contact 25 of the swing sensor 23 that is linked to the brake lever.
When the sensor 23 is turned on and off due to swinging of the brake lever, a pulse from the pulse oscillator 32 is applied to the base of the transistor Q ₄ of the timer 29 via the contact of the sensor 23 . Further, in this embodiment, the speed sensor is made contactless by using a rotating permanent magnet 30 and a magnetoresistive element 31' disposed in close proximity to the rotating permanent magnet 30.

In Fig. 1 above, the brake is operated by depressing the brake pedal, but the vehicle driving device for physically disabled persons shown in Fig. 1 and Fig. 5 of Japanese Patent Publication No. 56-7903 is similar to that shown in Fig. 1 above. A manual brake lever for manually operating the brake may be provided separately and the brake lever 2 may be moved as shown in FIG. In addition, in devices for people with physical disabilities, if the means for holding the fulcrum of the manual brake lever or for locking the movement of the manual brake lever with an electromagnet is fixed to the handlebar post of the vehicle instead of directly to the vehicle body, it may be difficult to secure the footwell. The space becomes clearer and the arrangement becomes better. The method of attaching the manual brake lever to the handle post is based on the actual method of 1972-
The method described in Japanese Patent No. 29231 can be used.

According to this invention, if you forget to apply the handbrake and open the door, the buzzer 35 will sound, but the tone will be different depending on whether the key switch S ₁ is on or off at this time, so the advantage is that you will immediately notice that you forgot to turn off the key switch. There is. Furthermore, this can be realized by only making slight changes to the oscillator, buzzer, handbrake switch, and door switch circuits necessary to warn of forgetting to apply the brake.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of the brake holding mechanism, with the swing sensor 23 removed to make the structure easier to understand. FIG. 2 is a cross-section of the main part of FIG. 1, and FIG. 3 is a perspective view of the main part of the device of FIG. 1 equipped with the swing sensor 23.
Figure 4 is a longitudinal section of the rocking sensor, Figure 5 is the electric circuit, Figure 6 is a diagram showing the main parts of the electric circuit, some of which are different from Figure 5, and Figure 7 is for the timer used in the pulse oscillator. 1 is a block diagram of an integrated circuit; FIG. 1...Brake pedal, 2...Brake lever, 5...Mounting plate, 6...Arm (connection member),
6f... Gear, 7... Pin fixed to mounting plate 5,
8... Pin (connection member), 9, 10... Connection member, 11... Connection rod (connection member), 12... Plate (connection member), 14... Detection micro switch,
18...Circular rotating plate, 19...Pinion, 20...
...Electromagnet, 20a...Coil, 21...Switch linked to accelerator, 29...Timer, a, b...
... Contact of detection switch 14, 23... Rocking sensor, 30... Magnet forming speed sensor, 31...
...Reed switch configuring the speed sensor, 31'
... Magnetoresistive element constituting the speed sensor, 32...
...Pulse oscillator, 33...Pulse oscillator for alarm, R _A , R ₂ ... Resistor, 34 ... Door switch, 35 ... Buzzer, D ₄ ... Diode, S ₅ ...
...Handbrake switch, _K1 to _K5 ...Relay, 39...Head lamp.

Claims (1)

[Scope of Claims] 1. In a vehicle equipped with a means for sounding a buzzer when a door is opened without applying a handbrake, the buzzer is operated by receiving power directly from a battery without going through a key switch to sound the buzzer. There is a connection between the battery and the oscillator via the oscillator, the door switch that activates the oscillator when the door is opened, the handbrake switch that deactivates the oscillator when the handbrake is applied, and the key switch. A device for warning of forgetting to turn off a key switch, characterized in that the device is provided with means for differently influencing the oscillation frequency of an oscillator depending on whether the key switch is connected or turned on or off. 2. The device for warning of forgetting to turn off the key switch according to claim 1, wherein the means for differently influencing the oscillation frequency of the oscillator depending on whether the key switch is on or off is a handbrake lamp and a resistor _R2 . .