JPH07116881B2 - Door lock device with child lock mechanism - Google Patents

Description

TECHNICAL FIELD The present invention relates to a door lock device with a child lock mechanism.

(Prior Art) Japanese Utility Model Laid-Open No. 62-196871 discloses a latch that rotates around a latch shaft in the front-rear direction and can engage with a striker fixed to a vehicle body of a vehicle, and a ratchet shaft in the front-rear direction. A ratchet that rotates around the center and engages with the latch to hold the engagement between the latch and the striker, an open lever that is connected to an outer handle of the door and that releases the ratchet from the latch when rotated, and a door Displaced between a child lock position provided between the inter-handle and the open lever to disconnect the inner handle and the open lever, and an unlock position to connect the inner handle and the open lever. A long rod (corresponding to the switching link of the present invention) is engaged with the long rod to change the long rod into a locked position and an unlocked position. A switching body to be operated, an opening formed on the indoor side metal plate of the door, and a child lock operating portion which is exposed to the outside through the opening and which is directly pinched by a finger to switch the switching body, In a door lock device with a child lock mechanism that cannot be opened by opening the inner handle but can be opened by opening the outer handle, the long rod is rearward at a substantially horizontal angle from the lower position on the back side of the lock device. When the inner handle is operated to open the door, the tip end side is vertically displaced around the connecting pin at the rear end of the long rod to rotate the open lever, and when the switching body is rotated, the lengthwise direction is changed. A door lock device with a child lock mechanism that slides to switch between a locked position and an unlocked position is described.

(Problems to be Solved by the Invention) In the known example, since the long rod for switching between the child lock position and the unlock position is configured to slide and switch in the front-rear direction, the length of the long rod and the sliding amount are different. As it is added to the size of the back side of the lock device as it is, the problem of thickening the lock device in the front and back, and the long punch is a structure that rotates the open lever by rotating motion, so it is thick to secure bending stress. There was a need.

(Means for Solving the Problem) Therefore, the present invention provides a striker 3 fixed to the vehicle body side.
And a synthetic resin body 1 fixed to the door side, and a latch shaft 7 in the front-rear direction that engages with the striker 3 and rotates forward when the door is closed provided in the front recess 4 of the body 1. Provided on the back side of the body 1 and a ratchet 6 that is locked by a ratchet shaft 8 in the front-rear direction that engages with the latch 5 that normally rotates when the door is closed and prevents reverse rotation of the latch 5. When the outer handle or the inner handle 41 is opened by opening the door, the open lever 14 for releasing the engagement of the ratchet 6 with the latch 5 and the switching body 29 provided on the back side of the body 1 are rotated to rotate the inner handle. A switching link 24 for switching and displacing between 41 and the open lever 14 between a non-connected child-lock state and a connected unlocked state, an opening 38 formed in the indoor side metal plate 13 of the door, and the opening In the door lock device with a child lock mechanism, which is formed into a shape that fits perfectly into the mouth portion 38 and that has a child lock operating portion 36 that switches and rotates the switching body 29, the switching link 24 has a vertically long shape. The switching link 24 is axially fixed by a connecting pin 23 to a member that moves up and down when the inner handle 41 is opened so that the switching link 24 moves up and down when the inner handle 41 is opened. An engaging portion that engages the switching body 29 slidably and engages the open lever 14 at the lower end of the switching link 24 when in the unlocked position.
It is a door lock device with a child lock mechanism provided with 28.

Further, according to the present invention, in the recess 4 formed on the front side of the lock body 1, the latch 5 that engages with the striker 3 fixed to the vehicle body when the door is closed and rotates normally, and the latch 5 that engages with the latch 5 are engaged. A ratchet 6 for preventing the reverse rotation of 5 is rotatably accommodated, and the ratchet 6 is disengaged from the latch 5 by rotating the outer handle of the door and the inter-handle 41 on the back side of the lock body 1 by the opening operation. The open lever 14 is axially stopped, and between the inner handle 41 and the open lever 14, a child lock position where the inner handle 41 and the open lever 14 are not connected, the inner handle 41 and the open lever 14 A switching link (24) for displacing the switching link (14) between the switching link (24) and the unlocked position in a coupled state,
A switching body 29 for displacing 24 between a child lock position and an unlock position, and a child lock operating portion 36 for switching and rotating the switching body 29 fitted so that there is almost no gap left in the opening 38 formed in the door. A door lock device with a child lock mechanism having:
The rear side of the back is the vertical direction and the rear protruding part that protrudes backward
A back plate 15 having an inner handle 4 is attached to the back protrusion 15a of the back plate 15 having the back handle 15a.
The inner lever 16 connected to 1 is rotatably stopped by a shaft 18, and the switching body 29 is stopped by a shaft 30 on the rear protruding portion 15a at a position separated from the inner lever 16 by a predetermined distance. The switching link 24 is arranged parallel to the vertical direction along the rear protruding portion 15a, and one end thereof is the inner lever 16
To the switching body 29 so as to be vertically movable, and the other end of the switching link 24 engages with the open lever 14 when in the unlocked position. A door lock device with a child lock mechanism provided with a portion 28 is provided.

(Embodiment) Explaining an embodiment of the present invention with reference to the drawings, 1 is a synthetic resin body of a lock device fixed to a vehicle door 2 (usually a rear seat door), and 3 is a striker fixed to the vehicle body side. Is. A recess 4 is formed on the front side (front side) of the body 1, and a latch 5 that engages with the striker 3 and a ratchet 6 that prevents reverse rotation of the latch 5 are formed in the recess 4.
The latch shaft 7 and the ratchet shaft 8 extending in the front-rear direction are respectively mounted. The ratchet 6 is provided with an engagement pin 10 that projects to the back side (rear side) through the through hole 9 of the body 1. 11 is a striker entry groove formed in the body 1, 12
Is a cover plate for closing the recess 4, and 13 is the door 2.
It is an indoor side metal plate.

On the back side of the body 1, a longitudinal axis (not shown)
Rotatably pivots the open lever 14. When the open lever 14 rotates, the engaging pin 10 of the ratchet 6 is rotated.
And the ratchet 6 is rotated in a direction to be disengaged from the latch 5, whereby the latch 5 is freely rotated and the door is opened. Although not shown, a lock lever for switching between a locked state and an unlocked state, a coupling lever for an actuator, and the like are provided on the back side of the body 1 as is well known. Reference numeral 15 is a back plate, a part of which is bent backward at a right angle to form a rear protruding portion 15a.

Reference numeral 16 denotes an inner lever that is connected to an inner handle 41 provided inside the door 2 of the vehicle via a rod 17, and is axially fixed to an upper position of the rear protrusion 15a by a shaft 18 in the left-right direction. An intermediate arm 19 is further mounted on the shaft 18, and the intermediate arm 19 is
One end 20 of 19 is superposed on the inner lever 16. Reference numeral 21 is a bent piece that engages with the inner lever 16 in a state where one end 20 overlaps with the inner lever 16. The other end 22 of the intermediate arm 19 moves up and down, and the upper end 25 of the switching link 24 extending in the up-down direction along with the rear protruding portion 15a is connected thereto by the connecting pin 23. Switching link 24
In the lower portion 26, a vertically elongated hole 27 and an engaging portion 28 are formed.

When the inner handle 41 is opened, the rod 17
The inner lever 16 rotates through the other end and the other end 22 moves up and down, whereby the switching link connected by the connecting pin 23.
24 slides up and down.

Reference numeral 29 is a switching body having three arms, and is axially fixed by a shaft 30 to a position below the rear protruding portion 15a of the back plate 15. The switching link is provided at the tip of the first arm 31 of the switching body 29.
Protrusions 32 that engage with the long holes 27 of 24 are formed. A tooth portion 34 is formed at the tip of the second arm 33 of the switching body 29. Also, switching body
The third arm 35 of 29 is a positioning arm, and a convex portion 43 that alternately engages with two concave portions 42 formed in the back plate 15 is formed at the tip thereof.

The switching body 29 rotates about the shaft 30 by the operation of the child lock operating portion 36, which will be described later, and this rotation causes the switching link 24 to have an open lever on its engaging portion 28 as shown in FIG. As shown in FIG. 5, the engagement position 28 is switched to the child lock position where the engaging lever 28 is disengaged from the open lever 14, and in the unlock position, the switching link 24 opens the inner handle 41. When the door is operated to slide upward, the engaging portion 28 of the switching link 24 engages with the end of the open lever 14 to rotate the open lever 14 to open the door, but in the child lock position, the inner handle 41 of the inner handle 41 is opened. Even if the switching link 24 slides due to the door opening operation, the engaging portion 28 does not engage with the open lever 14, so the open lever 14 does not rotate, and therefore the door cannot be opened.

The child lock operating part 36 of the embodiment is formed in a disc shape, and is rotatably attached to the back plate 15 by a shaft.
The child lock operating portion 36 includes a tooth portion of the second arm 33.
A tooth portion 37 that meshes with the tooth 34 is provided.

A circular opening 38 having substantially the same diameter as the child lock operating portion 36 is formed on the indoor side metal plate 13 of the door 2, and the opening 38 is formed.
38 through the rubber ring 39 to the child lock operating section
Face 36 without a gap. The outer side surface of the child lock operating portion 36 and the metal plate 13 are formed substantially flush with each other. Although the child lock operating portion 36 is formed as a disc-shaped rotary knob, it may be formed as a push-type or knock-type button. In this case, the child lock operating portion 36 and the opening 38 are formed. Can be formed in any shape as long as they have the same shape.

An engaging groove 40 into which a coin or the like is inserted is formed on the outer surface side of the child lock operating section 36, and the lock direction and the unlock direction are displayed as shown in FIG.

Although not shown, an outer handle provided outside the door of the vehicle is connected to the open lever 14.

(Function) The opening 38 formed in the indoor side metal plate 13 of the door 2 of the embodiment of the present invention is formed into a circular hole, and the child lock operating portion 36 is formed into a disk shape having substantially the same diameter as the opening 38. Therefore, the child lock operating portion 36 can close the opening 38 without any gap, foreign matter such as dust leaks out of the door 2, and the indoor side metal plate 13
Never get dirty.

Next, the operation of the child lock will be described. In the state shown in FIG. 4, that is, in the unlocked state, when the door opening operation is performed by the inner handle 41, the inner lever 16 rotates in the arrow A direction via the rod 17, Bending piece 21 and one end 20
The contact of the intermediate arm 19 causes the intermediate arm 19 to rotate about the shaft 18 and slide the switching link 24 upward. Then the switching link
Since the open lever 14 is rotated by the engagement portion 28 of 24, the ratchet 6 is rotated through the engagement pin 10 to disengage the latch 5 and the latch 5 can be reversed to open the door. .

Next, when the child lock operating portion 36 is directly pinched with a finger or a coin is inserted into the engaging groove 40 of the child lock operating portion 36 and rotated, the teeth portion 37 and the tooth portion 34 are meshed to switch. The body 29 rotates about the shaft 30, and the projection 32 of the first arm 31 of the switching body 29 moves the switching link 24 to the position shown in FIG. 28 and the open lever 14 are separated from each other to bring the child lock state.

In the child-lock state, even if the inner handle 41 is operated to open the door and the switching link 24 is slid upward through the rod 17, the engaging portion 28 of the switching link 24 has an open lever.
The open lever 14 does not rotate and the door is not opened because it does not engage with 14 and does not swing.

In the above operation, since the switching link 24 of the present invention is itself in the vertical direction, and the slide in the door opening operation is also in the vertical direction, the influence on the thickness of the locking device in the front-rear direction is small, and the device is It can be made thin, and because it has a configuration that slides up and down to rotate the open lever 14,
Since the switching link 24 is not twisted, it can be formed of a thin material.

Further, in the present invention, the inner lever 16 and the intermediate arm 19 connected to the inner handle 41 are axially fixed to the upper position of the rear protrusion 15a of the back plate 15, and the switching body 29 is axially fixed to the lower position of the rear protrusion 15a. Then switch between these
Since the 24 is arranged so as to follow the rear protruding portion 15a, the entire structure can be arranged reasonably and the assembly is easy.

Further, in the present invention, the engagement relationship between the switching link 24 and the switching body 29 is such that the lower end of the switching link 24 is displaced to the child lock position and the unlock position by the rotation of the switching body 29 and the door is opened by the inner handle 41. When the switching link 24 slides upward by operation, it suffices to guide the lower end of the switching link 24. Therefore, it is possible to have an extremely simple configuration such as the engagement relationship between the elongated hole 27 and the pin 32 shown in the embodiment. It is not necessary to use a strength member.

(Effects of the Invention) In the above-mentioned known example, a long rod (corresponding to a switching link of the present invention) for switching between a child lock position and an unlock position is a structure in which a structure long in the front-rear direction is slid in the front-rear direction for switching. Therefore, since the front-rear length of the long rod and the front-rear slide are directly added to the size of the back side of the lock device, there is a problem of thickening the lock device in the front-rear direction. Further, since the long rod has a structure in which the open lever is rotated by rotating motion, it is necessary to make it thick in order to secure bending stress.

However, the present invention is based on the striker 3 fixed to the vehicle body side.
And a synthetic resin body 1 fixed to the door side, and the slicer 3 when the door is closed provided in a recess 4 on the front side of the body 1.
The latch 5 is locked by a latch shaft 7 in the front-rear direction that is normally rotated by engaging with the ratchet shaft 8 in the front-rear direction that is engaged with the latch 5 that is normally rotated when the door is closed and prevents reverse rotation of the latch 5. A ratchet 6 that is axially locked by an open lever 14 that rotates by an opening operation of an outer handle or an inner handle 41 provided on the back side of the body 1 to disengage the ratchet 6 from the latch 5. When the switching body 29 provided on the back side of the body 1 is rotated, the inner handle 41 and the open lever 14 are switched and displaced between an unconnected child-locked state and a connected unlocked state, and the door. Of the indoor metal plate 13 of the above, and a child lock operating portion 36 which is formed into a shape that fits into the opening 38 and which switches and rotates the switching body 29. In the door lock device with the child lock mechanism, the switching link 24 has a vertically long shape, and the switching link 24 is the inner handle.
When the door 41 is opened, the inner handle 41 is moved up and down so that the member is moved up and down by the opening operation of the inner handle 41, and the connecting pin 23 is slidably attached to the lower end of the switching link 24. And the engaging portion 28 that engages with the open lever 14 when in the unlocked position at the lower end of the switching link 24.
Since it is a door lock device with a child lock mechanism provided with, the switching link 24 has a shape that is long in the up-down direction, and not a shape that is long in the front-rear direction as in a known example. Don't make it big. in addition,
The switching link 24 is axially fixed by a connecting pin 23 to a member (an inner lever member such as the intermediate arm 19) that moves up and down when the inner handle 41 is operated to open and close, and slides up and down for child lock and unlock. Since the structure for switching the lock device is adopted, the thickness before and after the locking device is not increased in this respect as well. Further, the lower end of the switching link 24 is slidably engaged with the switching body 29, and the lower end of the switching link 24 is provided with an engaging portion 28 that engages with the open lever 14 in the unlocked position. The switching link 24 does not rotate to rotate the open lever as in the known example, but since the open lever 14 is rotated only by the simplest vertical movement, the switching link is not twisted and is made of a thin material. Even if it can be used enough, it can be obtained.

Further, according to the present invention, in the recess 4 formed on the front side of the lock body 1, the latch 5 that engages with the striker 3 fixed to the vehicle body when the door is closed and rotates normally, and the latch 5 that engages with the latch 5 are engaged. A ratchet 6 for preventing reverse rotation of 5 is rotatably accommodated, and the ratchet 6 is disengaged from the latch 5 by rotating the outer handle and the inner handle 41 of the door on the back side of the lock body 1 by opening the door. The open lever 14 is axially stopped, and between the inner handle 41 and the open lever 14, a child lock position where the inner handle 41 and the open lever 14 are not connected, the inner handle 41 and the open lever 14 A switching link (24) for displacing the switching link (14) between the switching link (24) and the unlocked position in a coupled state,
A switching body 29 for displacing 24 between a child lock position and an unlock position, and a child lock operating portion 36 for switching and rotating the switching body 29 fitted so that there is almost no gap left in the opening 38 formed in the door. A door lock device with a child lock mechanism having:
The rear side of the back is the vertical direction and the rear protruding part that protrudes backward
A back plate 15 having an inner handle 4 is attached to the back protrusion 15a of the back plate 15 having the back handle 15a.
The inner lever 16 connected to 1 is rotatably fixed by a shaft 18, and the switching body 29 is fixed by a shaft 30 on the rear protruding portion 15a at a position separated from the inner lever 16 by a predetermined distance. The switching link 24 is arranged parallel to the vertical direction along the rear protruding portion 15a, and one end thereof is the inner lever 16
To the switching body 29 so as to be vertically movable, and the other end of the switching link 24 engages with the open lever 14 when in the unlocked position. Since the door lock device with the child lock mechanism is provided with the portion 28, not only the above-described effects can be expected, but also the rear protruding portion which is in the vertical direction on the back side of the lock body 1 and protrudes rearward. A back plate 15 having 15a is attached, and an inner lever 16 connected to the inner handle 41 is rotatably attached to the rear protruding portion 15a by a shaft 18 so that the rear protruding portion is separated from the inner lever 16 by a predetermined distance. Since the switching body 29 is fixed to the shaft 15a by the shaft 30 and the switching link 24 is arranged parallel to the vertical direction along the rear protruding portion 15a, both are mounted on the rear protruding portion 15a, which is easy to assemble. ,most Because the impossible is not fragments from switches in the pure vertical movement has a feature that moves smoothly.

[Brief description of drawings]

FIG. 1 is an external view showing the relationship between a lock device according to the present invention and a vehicle door, and FIG. 2 is a longitudinal sectional view showing the front side of a lock body,
FIG. 3 is a side view of the locking device, FIG. 4 is a relationship diagram in an unlocked state, FIG. 5 is a relationship diagram in a child-locked state, and FIG. 6 is a metal plate of a door and a child-lock operation portion. FIG. 7 is an enlarged front view of the child lock operating portion, showing a partial vertical sectional view showing the relationship. Explanation of reference numerals 1 ... Body, 2 ... door, 3 ... striker, 4 ... recess, 5 ... latch, 6 ... ratchet, 7 ... latch shaft, 8 ... ratchet shaft, 9 ... through hole , 10 ...... engagement pin, 11 …… striker entry groove, 12 …… cover plate,
13 …… Inside metal plate, 14 …… Open lever, 15 …… Back plate, 16 …… Inner lever, 17 …… Rod,
18 ... Shaft, 19 ... Intermediate arm, 20 ... One end, 21 ... Bending piece, 22 ... Other end, 23 ... Connecting pin, 24 ... Switching link,
25 …… upper end, 26 …… lower part, 27 …… long hole, 28 …… engaging part,
29 …… Switching body, 30 …… Axis, 31 …… First arm, 32 …… Protrusion, 33 …… Second arm, 34 …… Tooth section, 35 …… Third arm, 36 …… Child lock operating section , 37 …… Tooth, 38…
… Aperture, 39 …… Rubber ring, 40 …… Engagement groove, 41 …… Inner handle, 42 …… Recess, 43 …… Convex.

Claims (2)

[Claims] 1. A striker 3 fixed to the vehicle body side, a synthetic resin body 1 fixed to the door side, and a striker 3 engaged when the door is closed provided in a recess 4 on the front side of the body 1. The latch 5 is locked by a forward and backward latch shaft 7 and the ratchet shaft 8 is locked by a forward and backward latch 5 that engages with the latch 5 that is normally rotated when the door is closed. The ratchet 6 and the open lever 14 for rotating the outer handle or the inner handle 41 provided on the back side of the body 1 by the opening operation to release the engagement of the ratchet 6 with the latch 5, and the back side of the body 1. When the switching body 29 provided on the door is rotated, the inner handle 41 and the open lever 14 are switched and displaced between a non-connected child lock state and a connected unlocked state, and the door. A door lock with a child lock mechanism including an opening portion 38 formed in the indoor side metal plate 13 and a child lock operating portion 36 which is formed into a shape to fit into the opening portion 38 and which switches and rotates the switching body 29. In the device, the switching link 24 has a vertically long shape, and the switching link 24 moves up and down when the inner handle 41 is opened.
When the door is opened, the connecting pin 23 is axially fixed to the member that moves up and down, the lower end of the switching link 24 is slidably engaged with the switching body 29, and the lower end of the switching link 24 has an unlocked position. At this time, the door lock device with a child lock mechanism is provided with an engaging portion 28 that engages with the open lever 14. 2. A recess 4 formed on the front side of the lock body 1.
When the door is closed, a latch 5 that engages with the striker 3 fixed to the vehicle body to rotate in the forward direction and a ratchet 6 that engages with the latch 5 to prevent the latch 5 from rotating in the reverse direction are rotatably housed.
On the back side of the lock body 1, an open lever for rotating the outer handle and inner handle 41 of the door to open the ratchet 6 from the latch 5 by opening the door.
14, the inner handle 41 and the open lever 14 are locked, and the inner handle 41 and the open lever 14 are not connected to each other in a child lock position, the inner handle 41 and the open lever 14. Switching link 24 that displaces between the unlocked position and the connected position
And a switching body 29 which is engaged with the switching link 24 and displaces the switching link 24 between the child lock position and the unlock position, and an opening 38 formed in the door has almost no gap left. In a door lock device with a child lock mechanism having a child lock operating part 36 for switching and rotating the switching body 29 fitted to the rear, a rear protruding portion 15a which is vertical in the back side of the lock body 1 and protrudes rearward
Attaching a back plate 15 having
An inner lever 16 connected to the inner handle 41 is rotatably attached to the rear protruding portion 15a of the shaft 15 by a shaft 18, and the rear protruding portion 15a at a position spaced apart from the inner lever 16 by a predetermined distance has the above-mentioned structure. The switching body 29 is axially stopped by a shaft 30, the switching link 24 is arranged parallel to the vertical direction along the rear protrusion 15a, one end is connected to the inner lever 16 by a connecting pin 23, and the other end is the switching. An engaging portion that engages with the body 29 so as to be vertically movable, and engages with the open lever 14 at the other end of the switching link 24 when in the unlocked position.
Door lock device with child lock mechanism equipped with 28.