JP2529814Y2 - Door lock device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device used for an automobile door, and more particularly to a key release mechanism.

[0002]

2. Description of the Related Art A door lock device is provided with a lock mechanism for fixing a striker to one of a door and a vehicle body and for holding or releasing the striker on the other. The lock mechanism generally has a hook member for gripping or releasing the striker, and a ratchet member for restricting rotation of the hook member. One end of the ratchet member is pivotally supported by the base of the door lock device, and is normally urged to rotate in a direction for holding the hook member in the lock position. The lock is released by rotating the ratchet member against this urging force.

[0003] The operation of rotating the ratchet member in the unlocking direction is normally performed by an unlocking rod member that is operated in conjunction with the operation of the unlocking operation lever (or key rotor). The distal end of the releasing rod member is fitted in a lever holding hole formed in the other end of the ratchet member so as to be slidable via a bush and to be able to contact the bush at a predetermined position. . That is, the distal end portion of the releasing rod member is formed in a curved shape along the rotational locus of the ratchet member one end portion, and the bent portion is slidably moved in the bush and then abutted. A pressing portion is formed. When the ratchet member is rotated in the unlocking direction by the contact of the bending pressing portion with the bush, the hook member is released and the lock is released.

However, since the distal end of the releasing rod member is curved as described above and is slidably supported by the bush, if the sliding resistance between the curved portion and the bush varies, the ratchet is required. Since the rotation of the member requires a large force to act on the release operation lever, the operation feeling is degraded. Further, due to the sliding resistance, the tension spring for returning the ratchet member also needs an excessive tension. When an automatic lock release mechanism for rotating the ratchet member by an electric motor is used, an excessively large torque is required for the electric motor. Will be converted.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the conventional door lock device, and eliminates unevenness in operating force at the time of unlocking operation, and provides a door lock device with a good operation feeling. The purpose is to: Another object of the present invention is to provide a door lock device capable of preventing unauthorized unlocking.

[0006]

SUMMARY OF THE INVENTION The present invention provides a hook member for fixing a striker to one of a door and a vehicle body, fixing a base member to the other, and holding or releasing the striker on the base member; A lock mechanism having a ratchet member for engaging and disengaging the ratchet member and restricting rotation of the ratchet member in the striker releasing direction; and a motor actuator for driving the ratchet member to rotate in a direction in which the hook member releases the striker. Independently from the above, in a door lock device provided with a release rod member for driving a ratchet member in a direction in which a hook member opens a striker by a key operation, a holder made of a member separate from the base member is provided on a base member. The member is fixed, and the release rod member is always attached to the release A tip pressing portion capable of contacting / separating and pressing movement by contact is provided, a holder member is provided with a sliding guide groove for guiding the tip pressing portion of the releasing rod member, and the holder member further includes a distal end of the releasing rod member. It is characterized in that a protection portion for covering an engagement / disengagement portion between the pressing portion and the ratchet member is provided integrally. A bush is slidably supported in the slide guide groove of the holder member, and the distal end pressing portion of the release rod member can be fitted into the bush.

[0007] According to this configuration, it is possible to eliminate the variation in the rotational power of the ratchet member, and to improve the operation feeling when the lock is released by the release operation lever or the like as compared with the conventional door lock device. .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. The base 12 of the lock mechanism 11 is fixed to, for example, a door, and the striker 13 gripped or released by the lock mechanism 11 is fixed to the vehicle body side.

A striker entrance groove 14 is formed in the base 12, and a shaft 1 is provided on both sides of the striker entrance groove 14.
At 5 and 16, a hook member 17 and a ratchet member 18 are pivotally connected. The hook member 17 is attached to the striker holding groove 17.
a and a lock engagement portion 17b. On the other hand, the ratchet member 18 has a lock portion 18a which engages with and disengages from the lock engagement portion 17b.
7b is engaged with the striker holding groove 17.
The striker 13 is held at a. This is the locked state.

The hook member 17 and the ratchet member 18
The lock locking portion 17b is rotationally urged in a direction in which the lock locking portion 17b engages with the lock portion 18a by a tension spring 20 stretched between the two. That is, the hook member 17 is
7b is disengaged from the lock portion 18a.
By the force of 0, the striker 13 is rotated in a direction to open the striker 13 from the striker holding groove 17a. The above is a normal lock mechanism.

The ratchet member 18 has, at its tip, a roller 21 to be interlocked with the electromagnetic lock release mechanism 30, and has an opening force acting portion 51 above the roller 21.
The opening force acting portion 51 is formed by bending the tip of the ratchet member toward the rear surface of the base 12. A substantially rectangular through-hole 56 is formed in the center of the base 12, and the opening force acting portion 51 is located inside the through-hole 56.

A substantially box-shaped holder member 40 is mounted on the base 12 so as to correspond to the through hole 56. The holder member 40 has a bush guide plate 55, and the bush guide plate 55 is connected to the back surface of the base 12 by the joining surface 4.
2, and an engagement groove 41 that engages with the lower edge of the through hole 56. The bush guide plate 55 has the sliding guide groove 44 inclined from the lower left to the upper right in FIG.
This is because the inclination of the slide guide groove 44 is designed to be in line with the operating direction of the release rod member 53 by design.
If only the function of guiding the second member 2 to the opening force acting portion 51 is seen, the present invention is not limited to this inclined shape. That is, the shape may be parallel to the joint surface 42 or may be an arc shape along the rotation locus of the opening force acting portion 51.

The sliding guide groove 44 slides and guides the bush 52 to which the flange portion 52a is brought into contact with the outer side surface, toward the opening force acting portion 51 of the ratchet member 18. When the bending pressing portion 53a at the distal end of the releasing rod member 53 is inserted into the bush 52, and the releasing rod member 53 is operated by operating a releasing operating lever (or key) (not shown), the bush 52 is bent and pressed. It moves along the sliding guide groove 44 with the part 53a, and presses the opening force acting part 51.
As shown in FIG. 6, the opening force acting portion 51 is formed so that its vertical direction is long. This corresponds to the opening force acting portion 51 that draws an arc-shaped rotation locus about the shaft 16,
This is because the bush 52 that moves linearly follows the bush.

The holder member 40 includes a bush guide plate 5
On the rear surface of 5, a protection portion 49 having a storage space 45 for storing a bush 52a projecting to the rear side and a release rod member 53 is provided. At one end of the joining surface 42, a fixing ear 46 formed to protrude upward is formed. The fixing ear 46 has a through hole 47 through which the screw 48 passes. The holder member 40 allows the releasing rod member 53 fitted with the bending pressing portion 53a to pass through the sliding guide groove 44, engages the engaging groove 41 with the lower edge of the through hole 56, and connects the joint surface 42 to the base. A screw 48 is inserted through the through-hole 47 in a state where the through-hole 47 is joined to the back surface of the through-hole 12.
Screw 4 into the screw hole 60 formed in the base 12 in correspondence with
8 is attached to the base 12 by screwing.
Reference numeral 50 in the figure denotes an opening for inserting the bush 52 into the sliding guide groove 44.

A cam-integrated worm wheel 34 is rotatably supported on the base 12 by a shaft 33. The cam-integrated worm wheel 34 has a cam surface 34a (FIG. 2) formed on one surface for engaging with the roller 21 of the ratchet member 18, and an arc groove 34b centered on a rotation center hole 34c formed on the other surface. A worm gear tooth surface 34d is formed on the periphery.

The cam surface 34a is a cam having a shape in which the distance from the shaft 33 is gradually changed. When the cam-integrated worm wheel 34 rotates counterclockwise in FIG.
a pushes the roller 21 of the ratchet member 18 to rotate the lock portion 18a to the unlock position where the engagement with the lock engagement portion 17b is released. This cam integrated worm wheel 3
4 is urged to rotate by a torsion spring 38 provided on the shaft 33 so as to always return to the initial position.

The base 12 has an extension board 12a,
Electromagnetic lock release mechanism 30 via motor housing 19
The worm gear 36 fixed to the output shaft 35a is engaged with the tooth surface 34d of the cam-integrated worm wheel 34. The gear ratio between the worm gear 36 and the cam-integrated worm wheel 34 is such that the worm wheel 34
Thus, when returning to the initial position, the worm gear 36 can be rotated from the worm wheel 34 side.

Accordingly, in the door lock device having the above structure, the striker 13 enters the striker holding groove 17a of the hook member 17, and the lock engagement portion 17b is connected to the ratchet member 1.
When the release operation lever (or key) is operated in the locked state in which the lock member 18 is engaged with the lock portion 18a of FIG.
Along with the sliding guide groove 44 in the direction in which the opening force acting portion 51 is pressed. Then, the opening force acting portion 51 is pressed by the bush 52, and the ratchet member 18 is turned in a direction away from the hook member 17 against the tension spring 20. When the locking portion 18a and the locking portion 17b are disengaged from each other, the hook member 17 rotates clockwise in FIG.
The striker 13 held at a is released. Thus, the lock is released and the door opens.

The distal end of the releasing rod member 53 is
Instead of being slidably fitted and connected to the tip of the ratchet member as in the conventional door lock device, a bending pressing portion 53a that is free with respect to the ratchet member 18 is provided.
Slides along the sliding guide groove 44 and rotates the ratchet member 18 by contacting and pressing the opening force acting portion 51. Therefore, the distribution of force required for the operation of the release rod member 53 is always distributed. It is constant. Thereby, the operation feeling of the release operation lever is always stabilized. Further, since the ratchet member 18 has a structure independent of the releasing rod member 53 and is rotated by being pressed by the bush 52, the ratchet member 18 is rotated between the curved portion of the releasing rod member and the bush provided on the ratchet member in the conventional door lock device. A load is applied to the rotation of the ratchet member due to the sliding resistance of the ratchet member, thereby avoiding the inconvenience that the tension spring for returning the ratchet member requires more tension and the motor actuator requires more torque than necessary. can do.

Since the release rod member 53 and the bush 52 are protected by the protection portion 49 of the holder member 40, the release rod member 53 and the bush 52 are illegally operated in the release direction regardless of the operation of the release operation lever (or key). Can be reliably prevented from being stolen.

On the other hand, when the key is unlocked by electric operation, when the motor actuator 35 is driven, the output shaft 35a,
The cam-integrated worm wheel 34 is rotated counterclockwise via the worm gear 36 and the tooth surface 34d. Then, the cam surface 34a comes into contact with the roller 21 of the ratchet member 18 and starts pushing it, and the ratchet member 18 is rotated in a direction away from the hook member 17. When the cam-integrated worm wheel 34 rotates by a certain angle or more,
When the engagement between the lock member 8a and the lock engagement portion 17b is released, the hook member 17 rotates clockwise by the force of the tension spring 20, and
The striker 13 held in the striker holding groove 17a
To release. Thus, the lock is released and the door opens. The above lock release operation is performed by energizing the motor actuator 35 by the normal push button switch. When the energization ends, the cam-integrated worm wheel 34 returns to the initial position by the force of the torsion spring 38, and the ratchet member 18 returns to the lock position.
In this state, when the door that has been opened is closed, the striker 13 entering from the striker entrance groove 14 enters the striker holding groove 17a of the hook member 17. Then, the hook member 17 pushed by the striker 13 moves to the shaft 15.
, And the back surface of the lock engaging portion 17b pushes the ratchet member 18 to once rotate the ratchet member 18 to the unlocking position. When the striker 13 further enters, the lock portion 18a and the lock engaging portion 17b Return to the first locked state.

[0022]

As described above, in the door lock device of the present invention, the ratchet member is operated by the two systems of the motor actuator and the releasing rod member driven by the key operation independently of the motor actuator. In the door lock device, a holder member made of a member different from the base member is fixed to the base member, and the release rod member is moved in and out of contact with the releasing force acting portion provided on the ratchet member in a normal contact state. Provide a tip pressing part that can be pressed and moved,
Since the holder member has a sliding guide groove for guiding the tip pressing portion of the releasing rod member, the ratchet member and the releasing rod member are bent intricately, and the operating plane of the ratchet member and the key or the releasing rod are provided. Even in the case where the operating plane of the member is largely displaced or twisted, the operation feeling when unlocking by the key is not deteriorated. Furthermore, since the protection member is provided integrally with the holder member, unauthorized unlocking can be easily and reliably prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a door lock device according to the present invention.

FIG. 2 is a sectional view of the door lock device of FIG. 1 at the time of assembly.

FIG. 3 is a perspective view of the holder member as viewed from the front side.

FIG. 4 is a perspective view of the holder member as viewed from the back side.

FIG. 5 is a perspective view showing the holder member with a protection part partially cut away.

FIG. 6 is a perspective view showing an engagement structure of a ratchet member, a bush, and a release rod member.

[Explanation of symbols]

 Reference Signs List 11 lock mechanism 12 base 13 striker 14 striker entry groove 15 shaft 16 shaft 17 hook member 18 ratchet member 20 tension spring 21 roller 30 electromagnetic unlocking mechanism 33 shaft 34 cam integrated worm wheel 35 motor actuator 36 worm gear 37 rotation center hole 38 torsion spring Reference Signs List 40 Holder member 41 Engagement groove 42 Joint surface 44 Sliding guide groove 45 Storage space 46 Fixing ear part 47 Through hole 48 Screw 49 Protective part 51 Bending pressing part 52 Bush 53 Release rod member 55 Bush guide plate 60 Screw hole

Claims (2)

(57) [Scope of request for utility model registration] 1. A striker is fixed to one of a door and a vehicle body, while a base member is fixed to the other, and a hook member for gripping or releasing the striker is fixed to the base member; A lock mechanism having a ratchet member that regulates rotation of the striker in the opening direction; and a motor actuator that drives the ratchet member to rotate in a direction in which the hook member opens the striker. Further, the lock mechanism is independent of the motor actuator. A door lock device provided with a release rod member for driving the ratchet member in a direction in which the hook member releases the striker by key operation, wherein the base member has a holder member made of a member separate from the base member. Is fixed to the release rod member, and the release force provided on the ratchet member is A tip pressing portion capable of contacting / separating movement and pressing movement without contact with the portion at all times, a sliding guide groove for guiding the tip pressing portion of the release rod member is provided in the holder member, and the holder member is provided in the holder member. A door lock device integrally provided with a protection portion for covering an engagement / disengagement portion between the tip pressing portion of the release rod member and the ratchet member. 2. The door lock device according to claim 1, wherein a bush is slidably supported in the slide guide groove of the holder member, and a distal end pressing portion of the release rod member is fitted into the bush. .