JPS59220576A - Door lock apparatus for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to an improvement in a vehicle door lock device.

The industrial field in which it is used is advantageously applied to vehicles, especially automobiles, which are driven by a driver and have revolving doors.

Vehicle door locking devices include a locking mechanism that is placed on the free rotation end of the door to lock the door in a closed state, and a door locking knob that is placed on the upper edge of the inner panel of the door to lock or unlock this locking mechanism. A device consisting of a manual locking mechanism that is operated, and an automatic locking mechanism that is disposed below the manually operated locking mechanism and operates the locking mechanism to be locked or unlocked by a motor drive system using a reduction gear. Already known.

An example of a door locking device that uses the above-mentioned manual locking mechanism and deceleration device and includes an automatic locking mechanism driven by a motor is disclosed in Japanese Patent Laid-Open No. 105078/1983. The automatic lock operation mechanism of this device is a case provided inside the door panel as shown in Figs. 1, 2, and 3: a motor M placed at the lower part of the case 10 and a shaft pivoted at the upper part of the case 10. 11, and G+ constituting a speed reduction device disposed between this shaft 11 and the motor M.

G2. It is composed of a gear train G consisting of G4 and G3. The final gear G3, which is rotatably loosely fitted to one end of the shaft 11, meshes with the intermediate gear G4 formed integrally with the intermediate gear G2, and is arranged to be rotatable clockwise or counterclockwise by the rotational power of the motor M. has been done.

The final gear G3 has four substantially fan-shaped parts 13, and a pin 14 fixed to one end of the shaft 11 is inserted into this recessed part. The elastic bodies 16, 16 are provided with their protrusions 17 facing each other so as to be able to reciprocate within the same stroke range 1 (see Figure 3). Therefore pin 14
The reciprocating stroke 11, that is, the reciprocating movement within the swinging stroke S of the swing arm 15 locks or unlocks the locking mechanism by the vertical movement of the rod 19 connected to the free end of the swing arm 15 shown in the third time. It is the same as the manual operation stroke. When the motor M is now rotated, for example, clockwise, this rotational power is transmitted to the final gear G3, causing the final gear G3 to rotate in the same direction as the rotational direction of the motor M, that is, in the time@1 direction. At this time, the protrusion 17 of the elastic body I6 presses the pin 14 to rotate it clockwise, but the shaft 11 is restricted by a stopper 18 via the swing arm 15 so that it does not rotate beyond the stroke 4, so the pin 14
does not rotate beyond the stroke S, but is pressed by the elastic body 16 at the end of the stroke S, and the motor M is locked. At this time, the impact applied to the teeth of each gear due to the inertia of the movable part is absorbed by the elastic body 16.

When the motor switch is turned off here, the motor M becomes free, and the final gear G3 is rotated counterclockwise by the bending reaction force based on the energy stored in the elastic body 16, and rotated toward the original position.

In this invention, as mentioned above, in the final gear of the reduction gear,
It has a fan-like play of the same stroke as the swinging stroke of the swing arm that locks or unlocks the locking mechanism, and within this play, a return elastic body 16 is provided to return the impact to the lower leg device. It is characterized by this.

Therefore, in the above device, when restarting, the output shaft 11
This has the disadvantage that there is a delay in response before the driving force is transmitted to the motor, and it takes time to operate.

The technical problem to be solved by the present invention is to minimize response delay in an automatic lock operation mechanism driven by a motor using a speed reduction device.

The technical means taken by the present invention to solve the technical problems are as follows.

(a) A cylindrical cam fixed to the final gear of a reduction gear driven by a motor and having a cam groove carved into the cylindrical circumferential surface is rotatably supported, and (b) The cam groove is attached to the cylindrical cam. In the forward or reverse direction, the protrusions that slide into and are guided by the cam grooves are spiral grooves that have a pinch angle that generates a certain amount of movement in the axial direction of the cylindrical cam; (c) the protrusions are cylindrical; Missing grooves for causing the cam to miss in the axial direction and inhibiting the rotation of the cylindrical cam in a predetermined direction are provided at the starting and ending ends of the spiral groove, and (d) fixing the protrusion and connecting it to a locking mechanism. This is a vehicle door lock device with an automatic lock operation mechanism, which is provided with an output rod having a connecting rod that operates the lock mechanism to lock or unlock the state.

The above technical means works as follows.

When the motor rotates, this rotational power is transmitted to the final gear, which rotates the cylindrical cam in the same direction as the motor, causing the protrusion that slides in the cam groove to move forward and backward in the axial direction of the cylindrical cam, thus connecting it to the output lot. The lock can be opened and closed by moving the connecting rod back and forth and making the linear stroke (movement N) of the connecting rod coincide with the play stroke for locking and unlocking the lock.

If the rotation angle of the motor is set to obtain a predetermined stroke of the connecting rod, that is, the play stroke for locking/unlocking the lock, and the motor is rotated by this rotation angle, the protrusion will always be in the helical groove, and the motor will be in the correct position. Regardless of whether the rotation is reversed or
- The abutment moves with the evening rotation, which can eliminate the response delay, but during motor stoppage, in order to avoid impact on each gear of the deceleration device due to the inertia of the rotating member, the wall of the idle groove collides with the abutment, preventing rotation. It was designed to be able to be stopped.

The present invention produces the following unique effects.

(a) It has a small number of parts, can be formed compactly, and is easy to assemble.

In addition to the reduction gear, the output lot is moved using a cylindrical cam and protrusions, so there are fewer parts compared to conventional products, and the cylindrical cam can also be made smaller, making the overall assembly easier and more compact. It is something that can be done.

In order to show a specific example of the above-mentioned technical means, an illustrated embodiment will be described below.

FIG. 4 is a plan view of the main parts of an embodiment of the automatic locking mechanism according to the present invention, FIG. 5 is a sectional view taken along the line A-A in FIG. 4, and FIG. 6 is a perspective view showing the arrangement of each member. .

In Fig. 4, M is a motor, a gear G1 fixed to one end of the monitor shaft, and a gear G meshed with the gear Gl and fixed to the intermediate shaft 7.
2. A gear G3 that is integrally fixed to the intermediate shaft with the gear G2;
A reduction gear G consisting of a final gear G4 meshing with a gear G3, a cylindrical cam 20 integral with the final gear G4, a cam groove 21 carved around the cylinder, and a protrusion 2 in sliding contact with the cam groove 2r.
2 and an output rod 24 having a ring portion 23 to which a connecting rod (not shown) is connected to the locking mechanism. Note that 25 is a sleeve.

In FIG. 6, the motor M, the cylindrical cam 20, and the output rod 24 interposed between the two are housed in a box consisting of a case l and a lid 3 with their central axes parallel to each other.

7 and 8 are partially enlarged views showing the relationship between the cylindrical cam 20 and the protrusion 22, which are integral with the gear G4 and the shaft portion 2.
5.25, it is pivotally supported by the case l and lid 3 for one rotation. A helical groove 21 is carved on the circumferential surface of the cylindrical cam, and the protrusion 22 of the output rod that slides into the helical groove is displaced in the axial direction of the cylindrical cam by rotation of the cylindrical cam, thereby moving the output rod linearly forward and backward. (See Figure 8). The starting end and the terminal end of the spiral groove 21 are connected to form a missing groove 26 in the axial direction.
has been established. The missed grooves function as walls 27 and 28 that stop the rotation of the cylindrical cam in a predetermined direction with the protrusions 22 at the start and end ends of the helical groove, and after colliding with the protrusions, the cylindrical cam reverses and returns to the helical groove. The projection is set so that it can be moved by external force in the axial direction of the cylindrical cam (see Figure 7).
.

[Brief explanation of drawings]

1, 2, and 3 are cross-sectional views of a conventional automatic locking mechanism, FIG. 4 is a plan view of an embodiment of the automatic locking mechanism according to the present invention, and FIG. 5 is a cross-sectional view of a conventional automatic locking mechanism. cross section of the line,
Figure 6 is a perspective view of the component arrangement, Figure 7 is a partially enlarged front view showing the relationship between the cylindrical cam's missing groove and the protrusion, and Figures 8 (a) and (b) are the helical groove and the cylindrical cam. FIG. 2 is a partially enlarged view and a sectional view showing the relationship between protrusions. M...Motor, G1 v G2, G3,
G4... Gear of reduction gear, 20... Cylindrical cam, 21... Spiral groove, 22...
・Protrusion, 24... Output port y F, 26...
・Missing groove. Patent applicant: Kokusan Metal Industry Co., Ltd. Figure 3

Claims (1)

[Scope of Claims] A locking mechanism disposed at the free rotation end of a door attached to the vehicle body so as to be openable and closable and locking the door in a closed state; (a) a locking mechanism fixed to the final gear of a reduction gear driven by a motor; A cylindrical cam with a cam groove cut into the cylindrical circumferential surface is rotatably supported, and (b) the cam groove is slidably guided by the cam groove in the forward or reverse direction of the cylindrical cam. (c) The protrusions are formed into helical grooves having a pitch angle that generates a certain amount of movement in the axial direction of the cylindrical cam, and (c) the protrusions are oscillated in the axial direction of the cylindrical cam to rotate the cylindrical cam in a predetermined direction. (d) has a connecting rod that fixes the protrusion and connects to the locking mechanism to operate the locking mechanism in a locked or unlocked state; A vehicle door lock device comprising an automatic lock operation mechanism and an output lock.