JPH0868252A - Door locking device for car - Google Patents

Abstract

PURPOSE: To absorb an impact at the time of abutting contacting, and to restrict an abnormal sound generated by abutting contact with a case in a latch by forming a resin mold section on the outer circumference of the latch and forming a slit to a section abutted against the case at a door-opening place of the latch in the resin molding section. CONSTITUTION: A penetrating path 5 for penetrating a striker 4 and a recess 8 are formed on the surface side of a body 1 made of a synthetic resin, and a latch 6 engaged with the striker 4 and rotated in the direction of door closing (the counterclockwise direction) and a ratchet 7 holding the latch 6 at the place of door closing are arranged into the recess 8 while holding the penetrating path 5. A resin molding section 6a is formed on the outer circumference of the latch 6, and a slit 6b is shaped to a section abutted against the recess inwall 2 of the case 1 at the place of door opening of the latch 6 in the resin molding section 6a. A cushioning member 36 consisting of a resin material is mounted on the cam surface 18 of the ratchet 7 through molding. Accordingly, collision sounds at a time when a projecting section 22 is abutted against the half- engagement stepped section 16 and full-engagement stepped section 17 of the latch 6 can be avoided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle door lock device.

[0002]

2. Description of the Related Art A resin case having a recess formed therein, a latch rotatably provided in the recess for engaging with and disengaging from a striker on the vehicle body side, and a ratchet for engaging the latch and holding it in a closed position. In the vehicle door lock device equipped with, there is a problem that abnormal noise occurs when the latch collides with the case when the vehicle door is opened, and in order to suppress this,
Conventionally, a method of providing a sound deadening member such as rubber on the case side has been adopted.

[0003]

However, the method of providing the separate member in the case as described above increases the number of parts, increases the number of assembling steps, and increases the manufacturing cost. In view of the above problems of the prior art, the present invention is a door lock capable of reducing the number of assembling steps and the manufacturing cost without separately providing a noise canceling member to suppress the abnormal noise due to the collision between the latch and the case. The purpose is to provide a device.

[0004]

Therefore, in the present invention, a resin case having a recess formed therein, and a latch rotatably provided in the recess and engaged with a striker on the vehicle body side,
In a vehicle door lock device provided with a ratchet that engages with a latch and holds it at a door closed position, a resin molding portion is formed on the outer periphery of the latch, and the resin molding portion has a case at the door opening position of the latch. A slit is formed at the abutting portion.

[0005]

The resin molded portion on the outer periphery of the latch is bent by the action of the slit to absorb the impact at the time of collision. As a result, it is possible to suppress abnormal noise generated by the collision between the latch and the case.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view showing a vehicle door lock device according to the present invention, FIG. 2A is a rear view of the vehicle door lock device according to the present invention, FIG. 2B is a partially enlarged view thereof, and FIG. 2 (a) is a right side view, FIG. 4 is A-A in FIG.
Sectional view, FIG. 5 is a sectional view taken along line BB in FIG. 2, FIG.
Is a front view showing a state in which the latch is held in the half-latch position and (b) is a state in which the latch is held in the full-latch position. Fig. 7 is a front view of the ratchet. Fig. 8 is a link swinging with an open lever in a door open state. Rear view showing the state, FIG.
Is a rear view showing the state where the locking lever is rotated to the lock position in the door open state, FIG. 10 is a rear view showing the unlock state in the door closed state, and FIG. 11 is a state in which the handle is pulled in the door closed and locked state. FIG.

As shown in FIG. 1, on the front side of a synthetic resin body 1 of a door lock installed on the vehicle door side,
An entry path 5 for allowing the striker 4 fixed to the pillar on the vehicle body side to enter and a recess 8 are formed in a substantially central portion thereof, and the recess 8 is engaged with the striker 4 in the recess 8. Latch 6 that rotates in the door closing direction (counterclockwise) and an engagement step portion (half engagement step portion 1 to be described later) provided on the outer periphery of the latch 6.
6 or a ratchet 7 that engages with the full engagement step portion 17) to hold the latch 6 at the door closing position, and the ratchet 7 is disposed on both sides of the approach path 5.

The latch 6 is rotatably supported by a shaft 9. A pin 11 is projectingly provided on the back surface of the latch 6, and the pin 11 is slidably arranged in an arc groove 12 formed in the body 1. A spring 13 is held in a compressed state between one end surface of the arc groove 12 and the pin 11, whereby the latch 6 is always biased in the door opening direction (clockwise direction). The latch 6 is a known disc-shaped rotary latch, and an engaging groove 14 is formed in the radial direction thereof so that the striker 4 can be engaged when the door is closed. A half engagement stepped portion 16 and a full engagement stepped portion 17 that engage with a locking surface 41 of the ratchet 7 described later are formed on the two leg portions that are sandwiched. Also, the latch 6
A resin molding portion 6a is formed on the outer periphery of the resin molding portion 6a.
In a, the latch 6 is in the open position and the inner wall 2 of the recess of the case 1 is
A slit 6b is formed in a portion that abuts against.

The ratchet 7 also has a substantially disk shape, and a surface facing the latch 6 is a cam surface 18 which is cut out in an arc shape along the rotation locus of the latch 6, and the cam surface 18
And a protruding portion 22 that protrudes in the radial direction from the end of the locking surface 41. Further, the shaft hole 19 that pivotally supports the ratchet 7 is
Since the cam surface 18 is partially opened in the state of the material (see FIG. 7), the shaft 20 of the ratchet 7 can be brought close to the rotation locus of the latch 6, and as a result, the door lock The device can be downsized as compared with the conventional one. The opening 42 provided on the cam surface 18 (FIG. 7)
Is approximately equal to or smaller than the diameter of the shaft hole 19.

A cushioning member 36 made of a resin material is provided on the cam surface 18 by molding, and the cushioning member 36 closes the opening 42 of the rotary shaft hole 19, and further the shaft hole 19 is formed. Since it also extends in a cylindrical shape, no abnormal noise is generated when the ratchet 7 rotates. A buffer member 38 made of a resin material is provided on the protrusion 22 by molding, whereby the half engagement step 16 and the full engagement step 1 of the latch 6 are provided.
It is possible to avoid a collision sound when the protrusion 22 abuts on 7.

Further, on the lower surface of the projection 22, a projection 39 made of a resin material integrated with the cushioning member 38 is provided.
A spring mounting groove 40 is formed below the ratchet 7 along the outer circumference of the ratchet 7. A spring 15 is held in a compressed state between one end surface of the spring mounting groove 40 and the lower surface of the protrusion 22, whereby the ratchet 7 is always engaged with the latch 6 (counterclockwise direction). Is urged by. Where the spring 15
One end of the spring 15 is fitted and fixed to the protrusion 39, so that the vicinity of one end of the spring 15 can be prevented from hitting the wall surface of the spring mounting groove 40.
Friction due to sliding contact between the wall surface and the coil spring 15 can be reduced, and as a result, the ratchet 7 can be smoothly rotated. A pin 43 is planted on the ratchet 7 on the rear surface thereof so as to face the locking surface 41 with the shaft 20 interposed therebetween. And the pin 4
Reference numeral 3 indicates the rear side of the cutout hole 52 of the body 1.

As shown in FIGS. 2 and 5, a back plate 3 is attached to the back side of the body 1,
An open lever 27, one end of which is connected to the out handle and the other end thereof is connected to the inside handle, is provided on the upper side of the back plate 3, and one end thereof is connected to the door cylinder lock and the other end thereof is connected to the lock knob at the lower side thereof. Each locking lever 25 is pivotally supported. Further, an operating piece 23, of which one end abuts on the pin 43, is coaxially supported coaxially with the open lever 27.

The open lever 27 has its substantially central portion pivotally supported by the back plate 3 and is arranged substantially horizontally. Further, a spring 28 is locked between one end of the open lever 27 and a locking portion 44 provided above the back plate 3, whereby the open lever 27 is locked.
Is always biased in the closing direction (clockwise). And
This open lever 27 is a door opening handle (not shown)
Can be rocked by the operation. That is, one end can be swung counterclockwise through the connecting rod 50 by the out-handle operation and the other end counterclockwise by the inside handle operation.

As described above, the actuating piece 2 and its substantially central portion are overlapped with the open lever 27 and are coaxially supported by the back plate 3, and one end of the actuating piece 2 abuts on the pin 43 of the ratchet 7. There is. Therefore, open lever 2
When 7 is swung counterclockwise in FIG. 2, open lever 2
The pushing portion 27a of 7 pushes down a rod 24b described later,
The operating piece 23 rotates in the same direction via the rod 24b, the operating piece 23 rotates in the same direction via the pin 43 contacting the other end side, and the pin 43 contacting the other end side via the pin 43 contacting the other end side. Since the ratchet 7 can be rotated clockwise in FIG. 6, the engagement between the ratchet 7 and the latch 6 is released,
The latch 6 can be returned to the open position. At this time, although the latch 6 and the side wall 2 of the case 1 are in contact with each other, the resin molding portion 6a on the outer periphery of the latch 6 is bent by the action of the slit 6b and absorbs the impact at the time of contact. As a result, it is possible to suppress abnormal noise generated by the collision between the latch 6 and the inner wall 2 of the recess of the case 1. Further, the operating piece 23 is provided with a long hole 23a on the other end side thereof.
Is a rod 24b protruding from one end of a link 24, which will be described later.
Are slidably fitted.

The locking lever 25 includes three arms 25a, 25b and 2 pivotally supported by the back plate 3.
5c is formed. The arm 25b of the locking lever 25 is a lock knob (not shown) provided inside the door.
When the lever 31 connected to the lock knob is rotated from the inside of the vehicle to operate the lock knob, the locking lever 25 is rotated to the lock position II or the unlock position I to open and close the door lock device. Being able to lock. Further, one end of a link 24 is rotatably connected to the arm 25a of the locking lever 25, and the link 24 hangs down from the other end of the link 24 so as to enter the rotation locus of the open lever 27 and the operating piece 23. The rod 24b is slidably provided in the long hole 23a of the operating piece 23. Therefore, if the locking lever 25 is rotated, the rod 24b of the link 24 is rotated.
Can be displaced in the elongated hole 23a of the operating piece 23.

Further, the back plate 3 is provided with a rectangular hole 26 having a substantially rectangular shape within the swinging range of the actuating piece 23, and the upper edge of the square hole 26 has an inside of the square hole 26. An engagement protrusion 26a is provided toward the side. Meanwhile, link 24
The rod 24b is provided with an inverted triangular engagement piece 24a at the tip thereof, and the engagement piece 24a is arranged on the same plane as the engagement projection 26a protruding into the square hole 26. There is.

When the door is closed, the engagement piece 24a and the engagement protrusion 26a are not engaged (see FIG. 10). On the other hand, when the door is in the open state, the latch 6 opens the striker 4, and the end of the locking surface 41 of the ratchet 7 is in contact with the outer peripheral surface of the latch 6 having a smaller radius than the legs of the latch 6. , The ratchet 7 rotates in a direction approaching the latch 6, and therefore the pin 43 of the ratchet 7 moves downward in the reverse direction. Therefore, the operating piece 23 abutting on the pin 43 is rotated clockwise in FIG. 2, and the rod 24b of the link 24 engaged in the other end side long hole 23a is directed toward the upper edge of the square hole 26. When pulled up, an inverted triangular engagement piece 24a provided at the tip of the rod 24b contacts the upper edge. In this state, since the engagement piece 24a and the engagement protrusion 26a are in the engagement position, the link 24 cannot be moved, and therefore the locking lever 25 cannot be rotated to the lock position II. In this case, open lever 27 to spring 2
By swinging in the counterclockwise direction against the biasing force of 8, the pushing portion 27a of the open lever 27 moves the rod 24b of the link 24 downward, so that the engagement piece 24a and the engagement protrusion 26a are engaged. I can solve it. Therefore, the locking lever 25 can be rotated to the lock position II (see FIGS. 8 and 9). The engagement pieces 24a and the engagement projections 26a are formed with tapered surfaces in the directions in which they engage with each other (see FIG. 2B), so that a reliable engagement state can be obtained. Has been done. As described above, since the locking of the locking lever 25 is prevented by the engaging piece 24a of the rod 24b and the engaging protrusion 26a of the back plate 3, the locking lever 25 is attached to the ratchet 7 as in the conventional case. The turning force in the locking direction of does not act.

As shown in FIGS. 2 and 3, one end of a swing lever 34 is rotatably supported on the lower portion of the body 1, and the swing lever 34 is mounted on the rocking lever 25. It is possible to swing in a plane perpendicular to the rotation plane. Here, the pivotal support of the rocking lever 34 is as follows. That is, as shown in FIG. 4, the shaft portion 34 a formed at one end of the swing lever 34 is fitted into the recess 33 formed in the body 1, and the recess 33 is closed by the back plate 3. .

Since the swing lever 34 is pivotally supported in this manner, the shaft structure is simple and the mounting can be easily performed. Further, a long hole 34b is formed in the substantially central portion of the swing lever 34 at right angles to the longitudinal direction thereof, and the arm 25c of the locking lever 25 is inserted through the long hole 34b. Further, a key rod 35 that operates integrally with a door cylinder lock (not shown) is connected to the other end of the swing lever 34, and the key rod 35 is moved up and down by a key operation to swing. The locking lever 25 can be rotated to the lock position II or the unlock position I via the lever 34 to lock and unlock the door lock device. Further, as described above, the swing lever 34 is directly connected to the door cylinder lock by the key rod 35, and the swing lever 34 cannot be swung unless the door cylinder lock is operated. Also, since the locking lever 25 cannot be touched and cannot be unlocked, the vehicle antitheft property can be improved.

Next, the operation of the door lock device constructed as above will be described. When the door is closed from the door open state shown in FIG. 1, the latch 6 meshes with the leg portion of the U-shaped striker 4 fixed to the pillar on the vehicle body side and rotates counterclockwise, and the latch 6 shown in FIG. It rotates through the half latch position to the full latch position of FIG. At this time, the pin 43 of the ratchet 7 is at a position far from the approach path 5 of the striker 4 in the door open state, but at a position close to the approach path 5 in the half-latch and full-latch positions of the door closed state (FIG. 6).
(See (a) and (b)). This is because the ratchet 7 has a radial distance between the half-latch or full-latch meshing point where the ratchet 7 meshes with the latch 6 and the shaft 9 of the latch 6, and the edge of the cam surface 18 of the ratchet 7 is the outer peripheral surface of the latch 6 when the door is open. This is because the distance is larger than the radius of contact.

The movement of the pin 43 causes the actuating piece 23, which is in contact with the rear side, to rotate. That is, in the door open state, the pin 43 pushes in the operating piece 23 at the lowermost end of the notch hole 52 of the body 1 and abuts, and the rod 24b in the elongated hole 23a on the other end side is formed in the back plate 3 to form the square hole 26. Position on top edge (see Figure 2). When the door is closed, the latch 6 meshes with the striker 4 and rotates to the full latch position shown in FIG. 6B, and the pin 43 of the ratchet 7 moves upward. Therefore,
The operating piece 23 engaged with the pin 4 is rotated to move to the intermediate position of the body 1 in FIG. 10, and the other end side long hole 23a is formed.
The rod 24b of the link 24 engaged inside is moved in a direction away from the upper edge of the square hole 26 of the back plate 3, and the engaging piece 24a provided at the tip of the rod 24b and the upper edge of the square hole 26 are directed inward. The engagement projection 26a that has been projected is in a non-engagement position.

When the outside handle is pulled in this state, the open lever 27 rotates counterclockwise in FIG. 10, and the open lever 27 at the position facing the rod 24b.
The pressing portion 27a of the ratchet 7 further rotates the operating piece 23 in the same direction via the rod 24b, and the ratchet 7 is engaged with the other end side.
The pin 43 of is pulled up to the upper edge of the cutout hole 52. Therefore, since the pin 43 moves upward in the fully latched state of FIG. 6B, the ratchet 7 rotates clockwise to disengage from the latch 6 and open the striker 4 to open the door.

Also, the door is fully closed with the door closed (see FIG. 6).
When the locking operation is performed in (b) and FIG. 10), the locking lever 25 is operated by operating the door cylinder lock or the lock knob.
Is rotated from the unlocked position I to the locked position II, the rod 24b on the other end side of the link 24 to be coupled moves to the right side edge of the elongated hole 23a without being interfered by the engaging protrusion 26a. Even if the open lever 27 is swung when the rod 24b is present at this position, the rod 24b is not pushed because the notch 27b is provided adjacent to the pressing portion 27a of the open lever 27 as shown in FIG. Therefore, since the operating piece 23 does not swing, the pin 43 of the ratchet 7 does not move, and the ratchet 7 restrains the reverse rotation of the latch 6 to maintain the locked state of the door lock.

Next, the so-called keyless lock action of locking the key from the outside of the vehicle without using the key will be described. In the door open state of FIGS. 1 and 2, the engagement piece 24a of the link 24
Is in contact with the upper edge of the square hole 26. At this time, as shown in FIG. 2, since the engaging piece 24a of the link 24 is engaged with the engaging protrusion 26a, the locking lever 25 is left as it is. Cannot be rotated to the lock position I.
That is, the lock knob provided inside the vehicle cannot be operated. Therefore, it is possible to prevent the door from being locked by operating the lock knob while leaving the key in the vehicle. In order to avoid such a mistaken operation, a conscious locking operation is required. That is, when the open door handle is operated to swing the open lever 27 in the opening direction against the urging force of the spring 28, the open lever 27 is opened.
By this, the rod 24b of the link 24 is pushed down, and the engagement piece 24a provided at the end of the rod 24b is disengaged from the engagement protrusion 26a (FIG. 8). Therefore, in this state, the lock knob is operated. Locking lever 25
Can be rotated to the lock position II (FIG. 9).

When the door is closed after rotating the locking lever 25 to the lock position II in this way, the striker 4 on the vehicle body side engages with the engaging groove 14 of the latch 6, and the latch 6 of the spring 13 is engaged. Rotate to the full latch position against the biasing force. Then, the full engagement step portion 17 of the latch 6 engages with the locking surface 41 of the ratchet 7, and the reverse rotation of the latch 6 is prevented (FIG. 6B). At this time, as shown in FIG. 9, since the rod 24b of the link 24 is moved to the position facing the notch 27b of the open lever 27, the handle for opening the door is operated to open the open lever 27 in the opening direction (counterclockwise). Direction), the rod 24b is simply fitted into the notch 27b formed in the open lever 27, and the link 24
(That is, the operating piece 23) cannot be swung. Therefore, since the ratchet 7 connected to the operating piece 23 via the pin 43 cannot be rotated, the engagement between the latch 6 and the ratchet 7 cannot be released, resulting in a so-called idle lock state. .

As described above, in this device, the slit 6b is formed in the resin molding portion 6a on the outer periphery of the latch 6,
The abnormal noise due to the collision between the latch 6 and the inner wall 2 of the recess of the case 1 is suppressed. Therefore, it is not necessary to additionally provide a member such as rubber for silencing, and the latch 6
The desired effect can be achieved only by assembling the case 1 to the case 1, and the assembling property can be improved.

[0027]

According to the present invention, a resin case having a recess formed therein, a latch rotatably provided in the recess for engaging with and disengaging from a striker on the vehicle body side, are engaged with the latch and are in a closed position. In a vehicle door lock device including a ratchet for holding, a resin molding portion is formed on the outer periphery of the latch, and a slit is formed in the resin molding portion at a portion that abuts the case at the door opening position of the latch. Therefore, there is an excellent effect that the number of assembling steps and the manufacturing cost can be reduced without additionally providing a noise canceling member to suppress the abnormal noise due to the collision between the latch and the case.

[Brief description of drawings]

FIG. 1 is a front view showing a vehicle door lock device according to the present invention.

FIG. 2A is a rear view of a vehicle door lock device according to the present invention, and FIG. 2B is a partially enlarged view thereof.

FIG. 3 is a right side view of FIG.

4 is a cross-sectional view taken along the line AA in FIG.

5 is a sectional view taken along line BB in FIG.

FIG. 6A shows the latch in a half-latch position, and FIG.
FIG. 6 is a front view showing a state in which a latch is held at a full latch position.

FIG. 7 is a front view of a ratchet.

FIG. 8 is a rear view showing a state where the link is swung by the open lever in the door open state.

FIG. 9 is a rear view showing a state where the locking lever is rotated to the lock position in the door open state.

FIG. 10 is a rear view showing unlocking in a door closed state.

FIG. 11 is a rear view showing a state where the handle is pulled with the door closed and locked.

[Explanation of symbols]

 1 body 2 inner wall of recess 3 back plate 4 striker 5 entry path 6 latch 6a resin molding 6b slit 7 ratchet 8 recess 9 shaft 11 pin 12 arc groove 13 spring 14 engaging groove 15 spring 16 half engaging step 17 full Engagement step portion 18 Cam surface 19 Shaft hole 20 Shaft 22 Projection portion 23 Actuating piece 23a Long hole 24 Link 24a Engaging piece 24b Rod 25 Rocking lever 25a Arm 25b Arm 25c Arm 26 Square hole 26a Engaging protrusion 27 Open lever 27a Push Current part 28 Spring 31 Lever 33 Recessed portion 34 Swing lever 34a Shaft portion 34b Long hole 35 Key rod 36 Buffer member 38 Buffer member 39 Protrusion 40 Spring mounting groove 41 Locking surface 42 Opening 43 Pin 44 Locking portion 50 Connecting rod 51 Communicating Connection lever 52 Notch hole

Claims (1)

[Claims] 1. A resin case having a recess formed therein, a latch rotatably provided in the recess to engage with and disengage from a striker on the vehicle body side, and a ratchet that engages with the latch and holds the door in a closed position. In the vehicle door lock device including the above, a resin molding portion is formed on the outer periphery of the latch, and a slit is formed in the resin molding portion at a portion that abuts the case at the door open position of the latch. Vehicle door lock device.