JPH0742830A - Shift lock device of car with automatic transmission - Google Patents

Abstract

PURPOSE:To provide a shift lock device for car equipped with automatic transmission, with which the easiness in the installing works is enhanced, component parts can be standardized using a simple structure, and the costs can be reduced to a great extent. CONSTITUTION:A shift lock device concerned 10 includes a shift lever lock mechanism, and a shift lock solenoid 22 to constitute the mechanism is actuated with P-position sensing signal of a brake switch 40 and any existing NSS 54 while a key interlock solenoid 34 to constitute a key interlock mechanism is actuated with a sensing signal of a key interlock switch 24 which is to sense a sink of a lock plate 18. Therefore, the shift lock solenoid 22 can be operated without provision of any new component, and the key interlock switch 24 can be structured simply and made common for use in different car types. This leads to a reduction of the costs to a great extent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift lock device for a vehicle which is used in a vehicle equipped with an automatic transmission and which restrains shift operation of a shift lever and movement of an ignition key at a specific shift position. .

[0002]

2. Description of the Related Art Some vehicles equipped with an automatic transmission are provided with a shift lever lock mechanism for restraining a shift operation of a shift lever at a specific shift position and a key interlock mechanism for restraining a movement of an ignition key. is there.

In this shift lever lock mechanism, a detent pin provided on the shift lever is restrained by a shift lock plate. In this shift lever lock mechanism, when the shift lever is in the position of the parking range (P range), the detent pin engages with the shift lock plate and movement of the shift lock plate is blocked by the plate stopper, so that the shift lever lock mechanism moves. When the shift operation is restricted, and when the brake operation is performed, the shift lock solenoid is energized, the plate stopper is moved, the shift lock plate can be moved, and the shift operation of the shift lever can be performed. .

On the other hand, a key interlock mechanism is known in which a key cylinder of an ignition switch is constrained by a key interlock solenoid. In this key interlock mechanism, when the shift lever is in the position of the parking range (P range), the key interlock solenoid is in the disengaged state with the key cylinder, and the predetermined key cylinder (ignition key). Direction (ACC position to LOCK position), and when the shift lever is in a position other than the parking range (P range), the key interlock solenoid is energized to engage with the key cylinder. The rotation of the key cylinder is blocked to prevent the ignition key from being pulled out.

Further, the shift position of the shift lever is detected by a shift lock control switch arranged together with the shift lock plate, and the shift lock solenoid and the key interlock solenoid of each lock mechanism are operated based on this detection signal. It is like this.

By the way, in the shift lock device including the shift lever lock mechanism and the key interlock mechanism, the operation timing of the shift lock solenoid of the shift lever lock mechanism and the operation timing of the key interlock solenoid of the key interlock mechanism. And are not exactly the same, but subtly different.

That is, the key interlock solenoid of the key interlock mechanism must operate immediately after the shift lever knob button is operated and the detent pin moves together with the shift lock plate when the shift lever is in the P range position. There is. On the other hand, the shift lever lock mechanism is in the locked state when the shift lever is in the P range position (regardless of the movement of the detent pin), and the shift lock solenoid is energized when the brake operation is performed. That is, the detent pin can be moved only when the shift lock solenoid is energized, and the detent pin is moved together with the shift lock plate and can be moved to another range before the deenergization is released.

In other words, in the shift lever lock mechanism, the shift lock control switch described above is
It suffices to detect only whether the shift lever is in the P range position or in other positions. On the other hand, in the key interlock mechanism, the shift lock control switch described above is used when the shift lever is in the P range position. However, it is still necessary to detect whether the detent pin is stopped (non-operated) or moved (operated).

Therefore, the above-mentioned shift lock control switch needs to detect not only the shift position of the shift lever but also the position of the detent pin (shift lock plate) in the P range. Therefore, different circuits are formed. It had a complicated structure consisting of two detection switch parts.

For this reason, in the conventional shift lock device including the shift lever lock mechanism and the key interlock mechanism, the shift lock control switch itself having a complicated structure that constitutes two different circuits is expensive, and the above-described shift lock control switch is expensive. Due to such a delicate detection position, the adjustment at the time of assembling is complicated, which causes deterioration of the assembling property. Furthermore, the detection position detected by the shift lock control switch is slightly different for each vehicle type, so the same shift lock control switch cannot be applied to different vehicle types as it is, making it difficult to standardize and standardize parts. Met.

[0011]

In consideration of the above facts, the present invention does not require delicate adjustment at the time of assembling, improves the assemblability, and can standardize the parts with a simple structure. An object of the present invention is to obtain a shift lock device for a vehicle equipped with an automatic transmission that can reduce various costs.

[0012]

SUMMARY OF THE INVENTION A shift lock device for a vehicle equipped with an automatic transmission according to the present invention is a detent pin that is moved together with a shift lever and engages a detent plate to limit a shift operation of the shift lever. A shift lock plate that is arranged to be engageable and moves together with the detent pin in the engaged state, and a shift lock plate that is arranged to be engageable with the shift lock plate and blocks movement of the shift lock plate in a predetermined direction in the engaged state. Along with, the shift lock plate is always urged to the movement prevention state, the shift lock solenoid that releases the shift lock plate movement prevention state by operating electrically, and arranged to be engageable with the key cylinder of the ignition switch, By operating electrically, it engages with the key cylinder A key interlock solenoid that prevents the key cylinder from rotating in a predetermined direction, and restricts the movement of the shift lock plate by the shift lock solenoid to restrain the shift operation of the shift lever at a specific shift position. A shift lock device for a vehicle having an automatic transmission, wherein movement of an ignition key is restricted at a specific shift position by limiting rotation of the key cylinder by the key interlock solenoid. The specific shift position detection signal detected by the neutral start switch for activating the shift lock solenoid activates the shift lock solenoid and constitutes a single circuit to detect movement of the shift lock plate in the predetermined direction. Limit switch The detection signal detected by, is characterized by operating the key interlock solenoid.

[0013]

In the shift lock device for a vehicle equipped with the automatic transmission having the above structure, the shift lock plate that moves together with the detent pin is restricted in movement by the shift lock solenoid at a specific shift position, and the shift operation of the shift lever is restricted. Further, the shift lock solenoid is actuated to release the restraint of the shift lock plate, thereby enabling the shift operation of the shift lever. Further, the key cylinder of the ignition switch is prevented from rotating by a key interlock solenoid at a specific shift position, and the movement of the ignition key is restricted.

Here, the shift lock solenoid is operated by a specific shift position detection signal detected by a neutral start switch for detecting a shift position of the automatic transmission, and the key interlock solenoid is a single circuit. And is operated by a detection signal detected by a limit switch that detects the movement of the shift lock plate in a predetermined direction.

That is, since the shift lock solenoid is actuated by the existing neutral start switch used in the automatic transmission, the shift lever lock mechanism can be constructed without any new parts. Further, since the key interlock solenoid is operated by the limit switch that detects only the movement of the shift lock plate in the predetermined direction, this limit switch can be configured with a simple structure and is common to different vehicle types. It is also possible to use it as it is, and further, the delicate adjustment at the time of assembling is unnecessary and the assembling property is improved.

As described above, the shift lock device of the present invention has a complicated structure which has been indispensable in the prior art, and does not use a shift lock control switch which requires fine adjustment at the time of assembling, without using the shift lock solenoid and the key interlock solenoid. And can be operated together, fine adjustment at the time of assembly is not required, and assemblability is improved, and parts can be standardized with a simple structure, which can significantly reduce the cost. .

[0017]

1 is a block diagram of a shift lock device according to the present invention.
The overall configuration of is shown.

The shift lock device 10 comprises a shift lever lock mechanism for restraining the movement of the shift lever and a key interlock mechanism for restraining the rotation of the ignition key.

Here, since the mechanical structure of each lock mechanism is an existing one, detailed description thereof will be omitted, but in the shift lever lock mechanism, the detent plate 12 is arranged. The detent plate 12 has a detent hole 14 formed therein.
A detent pin 16 that is arranged on a shift lever (not shown) and projects in a direction substantially perpendicular to the shift lever penetrates through.

The detent pin 16 is vertically movable along the axis of the shift lever, and is biased upward by a biasing means (not shown) provided in the shift lever. Further, the detent pin 16 is connected to a detent release button (not shown) provided on the shift knob via a rod or the like (not shown) provided inside the shift lever, and the detent release button is pressed to operate. It is movable downward against the biasing force of the biasing means.

The detent hole 14 is "P",
The upper inner peripheral wall is bent in an uneven shape in association with each shift position of “R”, “N”, “D”, “2”, and “L”. As a result, the movement of the detent pin 16 in the arrow A or arrow B direction is restricted.

That is, the shift operation position is provided such that the detent pin 16 must be moved downward by pressing the detent release button until the shift lever can be swung in the direction of arrow A or B. There is. For example,
At the "P" shift position, the detent pin 16 is inserted into the deep groove of the detent hole 14, so that the shift operation to the "R" shift position cannot be performed unless the above operation is performed.

A lock plate 18 constituting a shift lever lock mechanism is slidably supported on the side of the detent plate 12, that is, on the side where the tip of the detent pin 16 projects from the detent hole 14. The lock plate 18 can move up and down along the axial direction of the shift lever located at the "P" shift position.
At the upper end of the lock plate 18, there is formed a notch 20 that opens toward the "R" shift position on the left side of FIG. 1, and the notch 20 has a tapered inlet portion 20A. When the shift lever is moved from the “R” to the “P” shift position in the notch 20, the detent pin 16 enters the inner portion 20B deeper than the inlet portion 20A. Further, when the lock plate 18 is located at the lower limit, the inlet portion 20A of the cutout 20 has the detent hole 1
4 and allows the detent pin 16 to move in the “R” direction. A shift lock solenoid 22 is attached below the lock plate 18. The shift lock solenoid 22 is adapted to attract the plunger 22A when energized, and to depress the plunger 2A when deenergized.
The plunger 22A is pulled out by the urging force of the return spring wound around 2A. Therefore, when the shift lock solenoid 22 is not energized, the plunger 2
2A protrudes toward the lock plate 18, and the plunger 22A is engaged with the lower end portion of the lock plate 18, whereby the lock plate 18 is prevented from descending. Therefore, in this state, the detent pin 16
Becomes unable to slip out of the deep groove of the detent hole 14 in the "P" range, and the shift lock state is obtained in which the shift operation of the shift lever is blocked. On the other hand, when the shift lock solenoid 22 is excited, the plunger 22A is pulled in against the urging force of the return spring, so that the shift lock solenoid 22 is separated from the lower end of the lock plate 18.

The shift lock solenoid 22 is operated by a control circuit which will be described in detail later. That is, when the shift lever is selected to the "P" shift position and the ignition switch 28 described later is in the "ON" state,
Only when the foot brake is depressed while the engine is operating, the current is electrically energized and excited by electrical control. In other words, when the shift lever is in a shift position other than "P" and the ignition switch is "ON", the energization is not excited in a state other than the operating state of the engine.

The shift lock solenoid 22 is not limited to the structure in which it is directly engaged with the lock plate 18, but another member such as a plate stopper which can be engaged with the lock plate 18 is arranged, and the shift lock solenoid is provided in this plate stopper. 22 may be connected to move the plate stopper to limit the lowering of the lock plate 18.

A key interlock switch 24 is attached above the lock plate 18.
The key interlock switch 24 has a normally-closed contact ON / OF with which the detection piece 26 can be engaged with the lock plate 18.
It is an F switch and opens the circuit only when the shift lever is selected to the "P" shift position and the detent pin 16 is not operated and is positioned above, and the detent pin 16 is operated to move downward. The circuit is closed before the lower surface of the lock plate 18 reaches the upper surface of the plunger 22A (in other words, when the shift lever is selected to a shift position other than "P" or a shift position of "P", detent is performed. When the pin 16 is operated and moved downward, the circuit is closed).

On the other hand, in the key interlock mechanism, the key cylinder 30 of the ignition switch 28 is provided with a cam portion 32. A key interlock solenoid 34 is arranged near the cam portion 32. The key interlock solenoid 34 is configured to project the plunger 34A when energized, and when the key is not energized, the plunger 34A is pulled in by the biasing force of the return spring wound around the plunger 34A. Therefore, when the key interlock solenoid 34 is not energized, the plunger 34A is held apart from the cam portion 32 of the key cylinder 30.
The rotation of the key cylinder 30 (rotation from the ACC to the LOCK direction) is prevented by the protrusion of 4A into the cam portion 32 of the key cylinder 30. Therefore, in this state, the ignition key 36 is prevented from coming out of the key cylinder 30.

This key interlock solenoid 34
Is operated by a control circuit which will be described in detail later. That is, the ignition switch 28 is "ON" or "A".
In the "CC" state, when the shift lever is selected to a shift position other than "P", or when the shift lever is selected to the "P" position and the detent pin 16 is operated to move downward, It is designed to be energized and excited by dynamic control.

Next, the shift lock solenoid 22 described above is used.
A configuration of a control circuit that controls the operation of the key interlock solenoid 34 will be described.

As shown in FIG. 1, the + terminal 38 of the shift lock solenoid 22 is connected to a power source 44 via a brake switch 40 and a fuse 42.
A brake lamp 46 is connected to the terminal 38. On the other hand, the minus terminal 48 of the shift lock solenoid 22 is connected to the collector of the transistor 52 of the shift lock control relay 50. The base of the transistor 52 is connected to the "ON" terminal 56 of the ignition switch 28 via a Neutras start switch (NSS) 54 for detecting the shift position of the automatic transmission, and the NSS 54 has A parking indicator lamp 58 is connected.

On the other hand, the key interlock solenoid 34
+ Terminal 60 of the ignition switch 28 "O"
It is connected to the “N” terminal 56 and the “ACC” terminal 62, and is also connected to the key interlock switch 24 described above. The “COM” terminal 64 of the key interlock switch 24 is connected to the base of the transistor 66 of the shift lock control relay 50. The minus terminal 68 of the key interlock solenoid 34 is connected to the collector of the transistor 66 of the shift lock control relay 50.

Next, the operation of this embodiment will be described. Now
When the shift lever is selected to the "P" shift position and the ignition switch 28 is in the "LOCK" and "ACC" positions, the shift lock solenoid 22 is in the non-energized state, so that the plunger 22A is locked by the lock plate 18.
And the plunger 22A projects toward the lock plate 1
The lock plate 18 is prevented from descending by engaging with the lower end of the lock plate 18. Therefore, in this state, the detent pin 16 cannot be pulled out from the deep groove in the "P" range of the detent hole 14, and the shift lever is in a shift lock state in which the shift operation is blocked.

[STAR] of the ignition switch 28
After the engine is started by the "T" operation, the parking indicator lamp 58 is turned on by the P position detection signal of the NSS 54 at the "ON" position. Further, in this state, the shift lock solenoid 22 is still in the non-energized state, so that the detent pin 16 cannot be pulled out and the shift operation of the shift lever is blocked.

Further, in this state, the detection piece 26 of the key interlock switch 24 has the lock plate 18
The circuit is open by engaging with. For this reason, the key interlock solenoid 34 is in a non-energized state, and the plunger 34A is pulled in by the urging force of the return spring and is held apart from the cam portion 32 of the key cylinder 30. Therefore, the rotation of the key cylinder 30 or the ignition switch 28 to the “LOCK” position is freely possible.

Here, when the shift lever is operated to shift, the foot brake is depressed. As a result, the brake switch 40 is closed and the brake lamp 4
6 lights up. Further, in this state, since the base current flows through the transistor 52 of the shift lock control relay 50 due to the closing of the NSS 54, the transistor 52 operates at the same time as the closing of the brake switch 40,
The shift lock solenoid 22 is energized and excited. As a result, the plunger 22A is sucked against the urging force of the return spring and separated from the lower end of the lock plate 18, and the lock plate 18 can move downward. Therefore, the detent release button can be pressed to move the detent pin 16 downward, and the shift lever can be operated to a desired shift position.

When the shift lever is selected to a shift position other than "P", the P position detection circuit of the NSS 54 is opened, so that the base current does not flow in the transistor 66 of the shift lock control relay 50, and therefore,
Step on the foot brake and press the brake switch 40
Even if the circuit is closed, the shift lock solenoid 22 is not energized and excited.

On the other hand, when the detent release button is pressed and the detent pin 16 is moved downward together with the lock plate 18 in order to select the shift lever to a shift position other than "P", the detection of the key interlock switch 24 is detected. The piece 26 descends with the lock plate 18 and the circuit is closed. Therefore, the base current flows through the transistor 66 of the shift lock control relay 50, and the transistor 66 operates to activate the key interlock solenoid 34.
Is energized and excited. As a result, the plunger 34A is attracted and protrudes, and engages with the cam portion 32 of the key cylinder 30. Therefore, in this state, the rotation of the key cylinder 30 (rotation from the ACC to the LOCK direction) is blocked,
The ignition key 36 is prevented from coming out of the key cylinder 30.

As described above, the key interlock solenoid 34 operates when the ignition switch 28 is in the "ON" or "ACC" state and the shift lever is selected to a shift position other than "P", and when the "P" is selected. When the detent pin 16 is operated to move downward even if the shift position is selected, the energization is excited, the rotation of the key cylinder 30 is blocked, and the ignition key 36 is stopped.
Is prevented from coming out of the key cylinder 30.

As described above, in this shift lock device 10, the lock plate 18 that moves together with the detent pin 16 is restricted in movement by the shift lock solenoid 22 at the "P" shift position, and the shift operation of the shift lever is restricted. Further, when the shift lock solenoid 22 is operated, the lock plate 18 is released from the constraint, and the shift lever can be shifted. In addition, the key cylinder 30 of the ignition switch 28
When the detent pin 16 moves even at a shift position other than "P" or at a "P" shift position, rotation is blocked by the key interlock solenoid 34, and movement of the ignition key 36 is restricted. It

Here, the shift lock solenoid 22 is
As described above, N for detecting the shift position of the automatic transmission
The key is operated based on the "P" shift position detection signal detected by SS54, and the key interlock solenoid 34 constitutes a single circuit and detects the movement of the lock plate 18 in the predetermined direction (downward). It is activated by the detection signal detected by the interlock switch 24.

That is, the shift lock solenoid 22
Since it is operated by the existing NSS 54 used in the automatic transmission, the shift lever lock mechanism can be configured without any new parts. Further, since the key interlock solenoid 34 is operated by the key interlock switch 24 that detects only the movement of the lock plate 18, the key interlock switch 24 can be a simple structure such as a simple limit switch. The same can be used for different vehicle types, and fine adjustment is not required at the time of assembling, and the assembling property is improved.

As described above, the present shift lock device 10 is
It is possible to operate the shift lock solenoid 22 and the key interlock solenoid 34 together without using a shift lock control switch that requires a delicate adjustment at the time of assembly due to a complicated structure that has been indispensable in the past. Since subtle adjustments are not required, the assemblability is improved and the parts can be standardized with a simple structure, which can significantly reduce the cost.

[0043]

Since the present invention has the above-mentioned structure, it does not require fine adjustment at the time of assembling, and the assembling property is improved, and the parts can be standardized with a simple structure, thereby significantly reducing the cost. It has an excellent effect that can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic overall configuration diagram of a shift lock device according to the present invention.

[Explanation of symbols]

 10 shift lock device 12 detent plate 16 detent pin 18 lock plate (shift lock plate) 22 shift lock solenoid 24 key interlock switch 28 ignition switch 30 key cylinder 34 key interlock solenoid 40 brake switch 50 shift lock control relay 54 new truss start Switch (NSS)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaki Fujita No. 1 Noda, Toyoda, Oguchi-cho, Niwa-gun, Aichi Prefecture Tokai Rika Electric Co., Ltd.

Claims (1)

[Claims] 1. A detent pin engageably disposed to move with a shift lever to engage a detent plate to limit shift operation of the shift lever,
A shift lock plate that moves together with the detent pin in an engaged state; A shift lock solenoid that is biased to a movement prevention state and electrically operates to release the shift lock plate movement prevention state and an ignition switch key cylinder are arranged so as to be engageable and electrically operated. A key interlock solenoid that engages with the key cylinder to prevent rotation of the key cylinder in a predetermined direction, and restricts movement of the shift lock plate by the shift lock solenoid so that the shift lock plate moves at a specific shift position. Restrain shift operation of shift lever A shift lock device for a vehicle equipped with an automatic transmission, which restricts the movement of an ignition key at a specific shift position by limiting the rotation of the key cylinder by the key interlock solenoid, wherein the shift of the automatic transmission is performed. By the specific shift position detection signal detected by the neutral start switch for detecting the position, the shift lock solenoid is operated, and a single circuit is configured to move the shift lock plate in the predetermined direction. A shift lock device for a vehicle equipped with an automatic transmission, characterized in that the key interlock solenoid is operated by a detection signal detected by a limit switch for detection.