JP5120941B2 - Vehicle door latch unit - Google Patents

Description

  The present invention relates to a vehicle door latch unit that has a latch that can be engaged with a striker provided in a vehicle, and a pole that can be locked to the latch, and that can be operated by an inner operation handle or an outer operation handle provided on a door.

Conventionally, as this type of vehicle door latch unit, a so-called “child protect” is known. The child protection is a function for prohibiting the opening of the door by operating the inner operation handle while allowing the opening of the door by operating the outer operation handle. This child protection is generally a manual switching type, and the driver has to get out of the car and perform a switching operation each time, which is not convenient. Therefore, in recent years, there has been a demand for the development of a vehicle door latch unit equipped with an electrically-switchable child protection that can be remotely operated from the driver's seat (see, for example, Patent Document 1).
Japanese Examined Patent Publication No. 07-103736 (5th to 8th lines on the left side of the second page, FIG. 1)

  However, like the conventional vehicle door latch unit described above, when the child protection is electrically switched, there is a problem that the cost of parts is significantly increased and the product price is increased.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle door latch unit capable of suppressing an increase in cost associated with making the child protection electric switching type.

  As a function mounted on the vehicle door latch unit, a so-called “cancel lock” is known in addition to the above-mentioned child protection. The cancel lock is a function in which the lock state is released (cancelled) when the door is opened and the vehicle door latch unit is locked, and the door is closed without operating the door operation handle. With this cancel lock, for example, the key can be prevented from being closed.

  By the way, if both the above-described cancel lock and child protection functions are mounted on the vehicle door latch unit, the following problems may occur.

  For example, when a vehicle door latch unit equipped with both functions is attached to the door of the driver's seat, there is a possibility that the driver cannot get out of the vehicle if the child protection is set due to an erroneous operation.

  If the cancel lock is set on the door of the driver's seat, it is not necessary to set the cancel lock on the other doors. In particular, a car door latch unit attached to a rear seat door requires a child protection rather than a cancel lock, and adding a cancel lock there leads to a complicated structure and an increase in product price. .

  That is, the vehicle door latch unit only needs to have either a cancel lock or a child protect. The inventor of the present application has focused on this point and has come up with the following invention.

  The vehicle door latch unit according to the invention of claim 1 made to achieve the above object, the fixed base fixed from the inside to the end wall of the door of the vehicle, and protruding from the fixed base toward the rotation center side of the door The mechanism base is integrated, the latch and pole are supported by the fixed base, and the components of the lock mechanism for locking the door are supported by the mechanism base and formed on the end wall of the door With the striker and latch engaged with the slit moving forward and backward, the pole is locked to the latch to hold the door closed, and by operating either the door inner handle or the outer handle, the pole to the latch When the door is unlocked, the door can be opened, and when the door is locked, the locking mechanism operates the force between the pole and the outer operation handle. In a vehicle door latch unit in which transmission is blocked and door opening is prohibited, a pole drive lever that rotates integrally with the pole and a mechanism base that is pivotally supported, and approaches the pole drive lever by operating the outer operation handle The outer operation follower lever that pivots to the side, the base end portion is pivotally supported by the outer operation follower lever, the unlocked position where the distal end is abutted against the pole drive lever, and the fixed base with respect to the unlocked position A lock switching member that can be moved back and forth between the lock position where the tip part is tilted away from the pole drive lever and the base part of the lock switching member is located on the fixed base side, allowing the parts to rotate A first common support shaft for supporting the shaft, and a pole drive lever side from the lock switching member and a position away from the fixed base from the pole drive lever. And a second common support part for rotatably supporting the parts, the first common support part and the second common support part for the cancel lock specification and the child protection specification. The parts to be assembled to the shaft can be reassembled. In the case of the cancel lock specification, the first common support shaft is rotated by the operation of the inner operation handle, and the outer operation driven lever always approaches the pole drive lever. An inner driven normal follower lever that can be rotated to the second common support shaft is assembled, and when the door is closed after the door is opened and the lock switching member is disposed at the lock position, A canceling rotation member is assembled that is pushed and rotated by the pole drive lever that rotates during the door closing process, and pushes the lock switching member back to the unlocked position. In such a case, only when the first common support shaft is rotated by the operation of the inner operation handle to approach the outer operation follower lever and the relay movable member is disposed between the first operation support lever and the outer operation follower lever. In addition, an inner operation special driven lever capable of rotating the outer operation driven lever to the side approaching the pole drive lever is assembled, and a seesaw lever is rotatably assembled to the second common support shaft portion. Furthermore, in the case of the child protection specification, the mechanism base is disposed on the side farther from the inside operation normal follower lever than the seesaw lever, and a motor having a rotation output shaft geared to one end of the seesaw lever, and the seesaw lever And a guide member supported so as to be able to reciprocate with respect to the mechanism base as the seesaw lever is rotated by the motor. The relay movable member is supported by the guide member so as to be integrally movable, and when the guide member is positioned at one end of the reciprocable range, the intermediate operation follower lever and the outer operation follower lever are While transmitting the operation force due to the operation of the inner operation handle, when the guide member is located at the other end of the reciprocable range, the transmission of the operation force is blocked between the inner operation special driven lever and the outer operation driven lever. It has the characteristics.

  According to the invention of claim 1, when the vehicle door latch unit is set to the cancel lock specification, the vehicle door latch unit operates as follows. First, when the vehicle door latch unit is unlocked, that is, when the lock switching member is located at the unlock position, when the outer operation handle is operated, the outer operation follower lever rotates to move the lock switching member. And press the pole drive lever. Thereby, the locking of the pole with respect to the latch is released, and the opening of the door is allowed. When the inner operation handle is operated, the inner operation normal follower lever rotates to rotate the outer operation follower lever. Hereinafter, the door is allowed to be opened by the same operation as when the outer operation handle is operated.

  On the other hand, when the vehicle door latch unit is in the locked state, that is, when the lock switching member is located at the lock position, the lock switching member is tilted and deviated from the pole drive lever. Therefore, the lock switching member passes through the pole drive lever regardless of which of the inner operation handle and the outer operation handle is operated. This makes it impossible to unlock the pole with respect to the latch and prohibits the opening of the door.

  Further, when the lock switching member is arranged at the lock position with the door opened, and then the door is closed without operating the inner operation handle and the outer operation handle, the closing process, that is, the latch and the striker are engaged. In this process, the pole is rotated by being pushed by the latch, and the pole driving lever is rotated integrally with the pole. Then, the cancel rotation member is rotated by being pushed by the pole drive lever, and the lock switching member is pushed back to the lock release position. That is, the locked state of the vehicle door latch unit is canceled and switched to the unlocked state.

  On the other hand, when the vehicle door latch unit is a child protection specification, it is as follows. When the lock switching member is in the unlocked position and the child protect is not set, the door can be opened by any operation of the inner operation handle and the outer operation handle. That is, when the child protect is not set, the guide member that can reciprocate with respect to the mechanism base is located at one end of the reciprocable range, and the relay movable member is the inner operation special driven lever and the outer operation driven lever. It is arranged between. In this state, when the inner operation handle is operated and the inner operation special driven lever rotates, the operation force is transmitted to the outer operation driven lever by the relay movable member. Then, the lock switching member moves and presses the pole drive lever. Thereby, the locking of the pole with respect to the latch is released, and the opening of the door is allowed.

  On the other hand, when the lock switching member is in the unlocked position and the child protection function is set, the door can be opened by operating the outer operation handle, but the door cannot be opened by operating the inner operation handle. It becomes. In the state where the child protection function is set, the guide member is located at the other end of the reciprocable range, and the relay movable member is disposed at a position away from between the inner operation special driven lever and the outer operation driven lever. . When the inner operation handle is operated in this state, the transmission of the operation force is interrupted between the inner operation special driven lever and the outer operation driven lever, so that the lock switching member cannot be moved. Thereby, opening of the door by operation of an inner side operation handle can be prohibited.

  Here, in the present invention, a motor is provided as a drive source for reciprocating the guide member, and the motor and the guide member are connected by a seesaw lever. As a result, the child protection can be electrically switched between the set state and the unset state.

  The first common support shaft provided on the mechanism base can be assembled with an inner operation normal follower lever when the cancel lock specification is used, while the inner operation normal follower lever is used with the child protection specification. Can be rearranged into a special driven lever inside. The second common support shaft provided on the mechanism base can be assembled to the cancel rotation member when the cancel lock specification is used, while the cancel rotation member is attached to the seesaw lever when the child protection specification is used. It was possible to rearrange.

  As described above, according to the present invention, the parts to be assembled to the first common support shaft part and the second common support shaft part can be rearranged between the cancel lock specification and the child protection specification. Therefore, the mechanism base can be shared, and the cost of parts related to the mechanism base can be reduced. Thereby, it is possible to suppress an increase in product price associated with changing the child protection to the electric switching type.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
The vehicle door 10 shown in FIG. 1 has an outer wall 11 made of a sheet metal pressed part, and a vehicle door latch unit 20 according to the present embodiment is built in an end portion opposite to the rotation center of the door 10. . The vehicle door latch unit 20 is substantially L-shaped as a whole when viewed from above, and is fixed in a state in which corner portions thereof are addressed to the corner portions on the inside of the end portion of the door 10.

  A striker 13 is provided on the inner surface of the door frame 12 in the vehicle. The striker 13 is formed, for example, by bending a wire having a circular cross section into a gate shape, and projects in a substantially horizontal direction. Further, the gate-shaped legs of the striker 13 are arranged in the door opening / closing direction, and a portion corresponding to one of the legs engages with the vehicle door latch unit 20. 6 to 8 are sectional views of only the portion of the striker 13 that engages with the vehicle door latch unit 20. Further, the striker 13 is received at the corner of the outer wall 11 where the outer shell end wall 11A constituting the end face of the door 10 and the outer shell side wall 11B constituting the vehicle inner surface of the door 10 intersect. A striker receiving portion (not shown) for cutting out is formed.

  The vehicle door latch unit 20 includes a latch mechanism 21 at a portion facing the outer shell end wall 11 </ b> A of the door 10. The vehicle door latch unit 20 is substantially entirely covered with a resin housing 50 (corresponding to the “mechanism base” of the present invention). The housing 50 can be divided into a case body 50 </ b> A and a cover body 70. Further, as shown in FIG. 1, the case body 50A includes an end cover portion 51 facing the outer shell end wall 11A and a case main body portion 55 facing the outer shell side wall 11B.

  The end cover portion 51 covers from the upper edge and one side edge of the end cover main plate wall 52 (see FIG. 4) facing the outer shell end wall 11A of the door 10 toward the outer shell end wall 11A. The part wall 53 is overhanging. Further, the case main body portion 55 projects the case main body wall 57 from the upper edge portion and one side edge portion of the case main body main plate wall 56 (see FIG. 5A) facing the outer shell side wall 11B of the door 10. It has a structure. The cover part wall 53 and the case body wall 57 are integrated and continuous.

  A cover body 70 is assembled to the case body 55 so as to cover the case body main plate wall 56. The cover body 70 has a cover main plate wall 71 opposed to the case main body wall 56, and a cover wall 72 projects from the upper edge and one side edge of the cover body 70 toward the case main body 55. Has been. The front end portion of the cover collar wall 72 is abutted against the front end portion of the case main body collar wall 57 in the case main body portion 55. In this state, the cover body 70 is fixed to the case main body main plate wall 56 with a bolt (not shown). The cover body 70 covers almost the entire case except for the lower end of the case main plate wall 56.

  The latch mechanism 21 includes a latch 23 and a pole 24 inside a mechanism case 22 (corresponding to a “fixed base” of the present invention). The mechanism case 22 is formed by sandwiching a substantially flat container-shaped resin part between a pair of sheet metal parts, and one of the sheet metal parts is addressed to the outer shell end wall 11A of the door 10, and the rear, upper, and one side. Are covered by an end cover portion 51 of the housing 50.

  Moreover, the mechanism case 22 is equipped with the bolt fixing | fixed part 22B, for example in three places, as shown in FIG. Then, the mechanism case 22 is placed on the inner surface of the outer shell end wall 11A, and a plurality of bolts (not shown) penetrating the outer shell end wall 11A from the outside are screwed into the bolt fixing portion 22B. A door latch unit 20 is fixed to the door 10. Further, the mechanism case 22 is formed with a striker entry groove 22M corresponding to a striker receiving portion (not shown) formed on the door. Then, the striker 13 moves forward and backward in the striker entry groove 22M in accordance with the operation of opening and closing the door 10.

  As shown in FIG. 6, in the latch mechanism 21, a pole 24 is rotatably provided below the striker entry groove 22M. The pole 24 is integrally provided with a pole support shaft 24J, and is supported rotatably on the mechanism case 22 by the pole support shaft 24J. The pole 24 includes a latch contact piece 24A and a stopper contact piece 24B that protrude in a direction opposite to the pole support shaft 24J. Further, a torsion spring 25 (see FIG. 9) is provided between the pole 24 and the mechanism case 22, and the pole 24 is urged counterclockwise in FIG. The stopper contact piece 24 </ b> B is positioned in contact with the pole stopper 26 provided in the mechanism case 22.

  In the latch mechanism 21, a latch support shaft 23J is provided above the striker entry groove 22M, and the latch 23 is pivotally supported by the latch support shaft 23J. The latch 23 has a structure in which a metal plate is covered with a resin to achieve sound insulation. The latch 23 includes a pair of locking claws 23A and 23B that are substantially parallel to each other, and a space between the locking claws 23A and 23B is a striker receiving portion 23G. Further, the latch 23 has a stopper abutting portion 23 </ b> S protruding from the opposite side to the protruding direction of the locking claw 23 </ b> A. As shown in FIG. 4, when the latch 23 rotates in one direction (clockwise direction in FIG. 6), the stopper contact portion 23S contacts the latch stopper 27 provided in the mechanism case 22, and the latch 23 Positioned in the unlatched position.

  The latch 23 is urged toward the unlatched position by a torsion spring 28 (see FIG. 9) provided between the mechanism case 22 and is positioned at the unlatched position when the door 10 is opened. In this unlatched position, one locking claw 23A (hereinafter referred to as “front locking claw 23A”) is retracted above the striker entry groove 22M and the other locking claw 23B (hereinafter referred to as “rear locking claw”). 23B "crosses the striker entry groove 22M, and the opening end of the striker receiving portion 23G faces the striker entry 22S side of the striker entry groove 22M.

  As a result, the striker 13 that has entered the striker entry groove 22M is received in the striker receiving portion 23G, and the striker 13 pushes the rear locking claw 23B, so that the latch 23 rotates counterclockwise in FIG. At this time, the latch contact piece 24A of the pole 24 is pushed by the front locking claw 23A and the rear locking claw 23B, the pole 24 resists the torsion spring 25, and the latch contact piece 24A rotates the latch 23. Rotates to a latch release position out of the area. When the door 10 is closed, as shown in FIG. 8, the striker entrance 22S side of the striker entry groove 22M from the striker 13 is closed by the front locking claw 23A, and the latch 23 and the striker 13 are engaged. The latch contact piece 24A of the pole 24 is rotated to the latch restricting position that has entered the rotation area of the latch 23, and the latch contact piece 24A is abutted against the front side of the front locking claw 23A. The reverse rotation of the latch 23 is restricted. Thereby, the door 10 is locked in the closed state.

  In order to open the door 10 in this state, the pole 24 may be rotated to the latch release position. Therefore, door handles 17 and 18 (see FIGS. 2 and 3) are provided on the inner surface and the outer surface of the door 10, and the door handles 17 and 18 are connected to the vehicle door latch unit 20, respectively. Hereinafter, when the door handles 17 and 18 are distinguished, the door handle 17 provided on the inner surface of the door 10 is referred to as an “inside door handle 17” (corresponding to an “inside operation handle” according to the present invention). The door handle 18 provided on the outer surface is referred to as an “outside door handle 18” (corresponding to an “outside operation handle” according to the present invention).

  As shown in FIG. 3, an outside open lever 30 (corresponding to the “outside operation driven lever” of the present invention) is provided at a position below the mechanism case 22 in the end cover main plate wall 52. The outside open lever 30 is pivotally supported by an open lever support shaft 30J orthogonal to the end cover main plate wall 52. Further, a sheet metal cover 59 is attached to the end cover main plate wall 52 so as to cover a lower portion of the mechanism case 22, and the sheet metal cover 59 overlaps a part of the outside open lever 30.

  The outside open lever 30 includes a first arm 31 and a second arm 32 protruding in a direction opposite to the open lever support shaft 30J. The outside door handle 18 is connected to the distal end portion of the first arm 31 via a connecting member (link, wire, etc.). On the other hand, the end of the second arm 32 is provided with an engaging projection 32A and a contact portion 32B. The engagement protrusion 32A engages with an open link 40 described later, and the contact portion 32B can contact an inside open lever 60 described later (see FIG. 2).

  The outside open lever 30 is urged counterclockwise in FIG. 3 by a torsion spring 30S (see FIG. 9) provided on the back side of the end cover main plate wall 52. Further, the first arm 31 of the outside open lever 30 protrudes to the outside of the housing 50, and is counterclockwise by abutting against a cover part wall 53 provided on one side edge of the end cover part 51. Rotation is regulated.

  That is, the outside open lever 30 is positioned at the initial position shown in FIG. 3 in a state where the outside door handle 18 is not opened, and obliquely moves downward from the first arm 31 toward the tip of the second arm 32. Turn to. On the other hand, when the outside door handle 18 is opened, the first arm 31 is pushed down, and the outside open lever 30 rotates in the clockwise direction in FIG. Thereby, the front-end | tip part of the 2nd arm 32 is lifted, and the open link 40 connected with the engagement protrusion 32A is pushed up. When the opening operation of the outside door handle 18 is stopped, it is returned to the initial position shown in FIG. 3 by the urging force of the torsion spring 30S.

  A plurality of components of the lock mechanism including the open link 40 and the inside open lever 60 described above are attached to a portion of the vehicle door latch unit 20 that faces the outer shell side wall 11B of the door 10.

  As shown in FIG. 2, an active lever support shaft 34J is provided at a position obliquely below the latch mechanism 21 in the case body main plate wall 56, and the active lever 34 can be pivoted on the active lever support shaft 34J. It is supported. The tip of the active lever support shaft 34J is supported by a bearing portion 71A formed on the cover main plate wall 71 of the cover body 70, and the active lever support shaft 34J is located between the case main body main plate wall 56 and the cover main plate wall 71. It is supported by both ends.

  The active lever 34 includes a lock knob connecting arm 35 extending downward from the active lever support shaft 34J and a fan-shaped rotating board 36 projecting upward. A lock knob 19 (see FIG. 2) provided on the vehicle inner side of the door 10 is connected to the distal end portion of the lock knob connecting arm 35 via a connecting member (such as a cable). When the lock knob 19 is locked, the active lever 34 rotates in the counterclockwise direction in FIG. 2, and when the lock knob 19 is unlocked, the active lever 34 rotates in the clockwise direction in FIG.

  The fan-shaped rotating board 36 has a fan shape centered on the active lever support shaft 34J. That is, the outer peripheral surface of the fan-shaped rotating board 36 has an arc shape centered on the active lever support shaft 34J. As shown in FIG. 9, the fan-shaped rotating disk 36 is formed with an engaging recess 36 </ b> A that opens radially outward. Either one of the engagement protrusions 45A and 45A of the worm wheel 45 rotated by an electric motor 44 for switching the lock described later can be engaged with the engagement recess 36A. Thereby, the active lever 34 and the worm wheel 45 are connected so as to rotate in opposite directions.

  That is, when the vehicle door latch unit 20 is locked by the lock switching electric motor 44, the worm wheel 45 rotates in the clockwise direction in FIG. 9, and the active lever 34 rotates in the counterclockwise direction. On the contrary, when the lock is released, the worm wheel 45 rotates in the counterclockwise direction in FIG. 10 and the active lever 34 rotates in the clockwise direction.

  A longitudinally long slot 36 </ b> B is formed in the side of the fan-shaped rotating board 36 on the side close to the latch mechanism 21. An engagement pin 41 of an open link 40 described later is slidably engaged with the long hole 36B.

  The active lever 34 is urged by a torsion spring 37 provided between the case main body main plate wall 56. One end of the torsion spring 37 is locked in a locking hole 56A (see FIG. 5A) formed through the case main plate wall 56, and the other end is formed in the lock knob connecting arm 35 of the active lever 34. It is locked in the locking hole 35A.

  When the active lever 34 is in the unlocked position shown in FIG. 9, the torsion spring 37 biases the active lever 34 in the clockwise direction in FIG. That is, urging is performed so as to maintain the unlocked position. At this time, the first locking projection 34A that stands up from the active lever 34 toward the case main plate wall 56 abuts against a stop member 56B (see FIG. 10) that is formed to protrude from the case main plate wall 56. The rotation of the direction is restricted, and the active lever 34 is positioned at the unlock position.

  When the active lever 34 is in the locked position shown in FIG. 10, the torsion spring 37 biases the active lever 34 in the counterclockwise direction in FIG. That is, urging is performed so as to maintain the lock position. At this time, the second locking protrusion 34B that stands up from the active lever 34 toward the case main plate wall 56 abuts against the stop member 56B, whereby the counterclockwise rotation is restricted, and the active lever 34 is locked. Is positioned.

  As shown in FIG. 2, an open link 40 (corresponding to the “lock switching member” of the present invention) is provided between the active lever 34 and the latch mechanism 21 so as to be linearly movable. The open link 40 has a vertically long structure and is connected to both the outside open lever 30 and the active lever 34 described above.

  That is, an engagement hole 40A is formed at the lower end of the open link 40, and the engagement protrusion 32A of the outside open lever 30 enters and engages with the engagement hole 40A. Further, the upper end corner of the open link 40 is provided with an engagement pin 41 protruding toward the case body main plate wall 56, and this engagement pin 41 is slidably engaged with the long hole 36B of the active lever 34. doing. Note that the engagement hole 40A formed in the open link 40 sandwiches the engagement protrusion 32A of the outside open lever 30 from the plate thickness direction and allows the engagement protrusion 32A to rotate relative to the engagement hole 40A. It is configured.

  An inside open lever common support shaft 60J (corresponding to the “first common support shaft portion” of the present invention) is provided at a position below the latch mechanism 21 on the side of the lower end portion of the open link 40. A lever 60 (corresponding to the “inner operation normal driven lever” of the present invention) is pivotally supported. The inside open lever common support shaft 60J is fixed to a through hole 71E (see FIG. 5B) formed in the cover body 70. Specifically, the through hole 71E is disposed on the mechanism case 22 side from the lower end portion of the open link 40, and the inside open lever common support shaft 60J is fitted and fixed to the through hole 71 to cover the cover body 70. The main plate wall 71 stands up at a substantially right angle toward the case main body main plate wall 56. As shown in FIG. 2, the inside open lever 60 extends downward from the inside open lever common support shaft 60J, and includes a connecting portion 60A and a contact portion 60B. An inside door handle 17 provided on the inner surface of the door 10 is connected to the connecting portion 60A via a connecting member (such as a cable). On the other hand, the contact portion 60B is arranged below the contact portion 32B of the outside open lever 30.

  The inside open lever 60 is positioned at the initial position shown in FIG. 2 in a state where the inside door handle 17 is not opened. In this initial position, the contact portion 60B of the inside open lever 60 and the contact portion 32B of the outside open lever 30 are separated. On the other hand, when the inside door handle 17 is opened, the inside open lever 60 rotates clockwise in FIG. 2 and comes into contact with the contact portion 60B (state of FIG. 9). Is pushed up from below. Then, the second arm 32 of the outside open lever 30 is pushed up, and the outside open lever 30 rotates in the clockwise direction in FIG. When the opening operation of the inside door handle 17 is stopped, the outside open lever 30 and the inside open lever 60 are restored to the original initial state by the biasing force of the torsion spring 30S between the outside open lever 30 and the end cover main plate wall 52. Return to position.

  As shown in FIG. 9, a lift lever 63 (corresponding to the “pole drive lever” of the present invention) that rotates integrally with the pole 24 is disposed above the open link 40. The lift lever 63 is fixed to an end of the pole support shaft 24J that protrudes to the back side of the latch mechanism 21, and extends upward from the pole support shaft 24J toward the open link 40.

  When the active lever 34 is located at the unlocking position shown in FIG. 9, the open link 40 has an upright posture in which the upper end of the open link 40 is abutted against the tip of the lift lever 63 in the vertical direction. On the other hand, when the active lever 34 is located at the lock position shown in FIG. 10, the open link 40 has a tilted posture in which the upper end portion thereof is shifted from the tip end portion of the lift lever 63.

  Accordingly, when any of the door handles provided on the door 10 is opened while the active lever 34 is in the unlocked position (the state shown in FIG. 9), the open link 40 is guided to the long hole 36B and directed toward the lift lever 63. The tip of the lift lever 63 is pushed up from below, and the lift lever 63 is rotated. As the lift lever 63 rotates, the pawl 24 can be rotated from the latch restriction position to the latch release position.

  On the other hand, when any of the door handles provided on the door 10 is opened while the active lever 34 is in the locked position (the state shown in FIG. 10), the open link 40 is guided by the long hole 36B and moves obliquely upward. Pass through the side of the lift lever 63. Therefore, the tip of the lift lever 63 is pushed up and does not rotate, and the pole 24 does not rotate. That is, the opening operation of the door handle provided inside and outside the door 10 is invalidated, and the opening of the door 10 is prohibited.

  A contact guide surface 42 with which a later-described cancel lever 47 (corresponding to a “cancel rotating member” of the present invention) is always in contact is provided on the side surface of the open link 40 on the side away from the latch mechanism 21. Yes.

  As shown in FIG. 10, the upper half of the contact guide surface 42 is a flat surface portion 42A parallel to the longitudinal direction of the open link 40, and the lower half approaches the latch mechanism 21 as it goes downward. It is a curved surface portion 42B. The flat portion 42A is a contact portion of a cancel lever 47 described later when the door handle provided in the door 10 is not opened, that is, when the open link 40 is disposed at the lower end position of the linear motion stroke. 48A is formed at a position where it abuts. The curved surface portion 42B is formed at a position where the contact portion 48A of the cancel lever 47 contacts when the door handles 17 and 18 are opened, that is, when the open link 40 is pushed upward. .

  An electric motor 44 for switching the lock is attached to the side of the case body main plate wall 56 on the side opposite to the latch mechanism 21 across the rotation shaft of the cancel lever 47. The electric motor 44 is attached such that its rotation output shaft 44J is parallel to the case main body main plate wall 56. The stator 44S is disposed on the upper side, and the rotation output shaft 44J extends downward. Further, the rotation output shaft 44J is provided with a worm gear 44G, and the worm gear 44G meshes with the worm wheel 45.

  As shown in FIG. 9, the worm wheel 45 is disposed at an intermediate position between the worm gear 44 </ b> G and the rotation shaft of the cancel lever 47. The worm wheel 45 is rotatably supported by a wheel support shaft 45 </ b> J standing upright from the case main plate wall 56. The front end portion of the wheel support shaft 45J is supported by a bearing portion 71B (see FIG. 5B) provided on the cover main plate wall 71 of the cover body 70. The wheel support shaft 45J covers the case main body main plate wall 56 and the cover. Both ends of the main plate wall 71 are supported. The worm wheel 45 is disposed so that the fan-shaped rotating plate 36 of the active lever 34 is disposed between the worm wheel 45 and the case main plate wall 56 (so as to overlap the fan-shaped rotating plate 36).

  A pair of engaging protrusions 45 </ b> A and 45 </ b> A protrude from the surface of the worm wheel 45 facing the main case main plate wall 56. Both engagement protrusions 45A and 45A are arranged on the same straight line passing through the rotation center of the worm wheel 45 with the rotation center interposed therebetween. When one of the engaging protrusions 45 </ b> A and 45 </ b> A faces the engaging recess 36 </ b> A of the active lever 34, the other faces the outer peripheral edge of the fan-shaped rotating board 36.

  When switching from the unlocked state shown in FIG. 9 to the locked state shown in FIG. 10 by the electric motor 44, the worm wheel 45 rotates in the clockwise direction in FIG. At this time, one engagement protrusion 45A enters and engages with the engagement recess 36A, and is pushed by the engagement protrusion 45A to rotate the active lever 34 counterclockwise. When the other engagement protrusion 45A comes into contact with the outer peripheral edge of the fan-shaped rotation board 36 (on the right side of the engagement recess 36A) and one engagement protrusion 45A is retracted from the engagement recess 36A, the electric motor 44 is stopped. Then, the worm wheel 45 is also stopped, and the active lever 34 is positioned at the lock position.

  On the other hand, when switching from the locked state shown in FIG. 10 to the unlocked state shown in FIG. 9 by the electric motor 44, the worm wheel 45 rotates counterclockwise in FIG. At this time, one engagement protrusion 45A enters and engages with the engagement recess 36A, and is pushed by the engagement protrusion 45A to rotate the active lever 34 in the clockwise direction in FIG. When the other engagement protrusion 45A comes into contact with the outer peripheral edge (left side of the engagement recess 36A) of the fan-shaped rotation board 36 and the one engagement protrusion 45A retracts from the engagement recess 36A, the electric motor 44 stops. Then, the worm wheel 45 is also stopped, and the active lever 34 is positioned at the unlocking position.

  Similar to the inside open lever 60, the cancel lever 47 is attached to the cover main plate wall 71 of the cover body 70.

  The cancel lever 47 is pivotally supported by a cantilever-like cancel lever support shaft 47 </ b> J standing substantially perpendicularly from the substantially central portion of the cover main plate wall 71 toward the case body main plate wall 56. Specifically, a cylindrical boss 71C protrudes from the base end portion of the open link 40 on the lift lever 63 side of the cover main plate wall 71 and at a position away from the lift case 63 from the mechanism case 22 (see FIG. 5 (B)), the cancel lever support shaft 47J is fitted and fixed to the common support shaft hole 71D (corresponding to the “second common support shaft portion” of the present invention) formed inside the cylindrical boss 71C. Yes.

  The cancel lever 47 includes a first arm 48 and a second arm 49 protruding from the cancel lever support shaft 47J, and has an L shape as a whole. Abutting portions 48A and 49A are formed at the tip portions of the first and second arms 48 and 49, respectively. The contact portion 48A bends and raises the lower end portion of the first arm 48 to the opposite side of the cover body 70, and projects the bent portion to the latch mechanism 21 side as shown in FIG. Has a structure. The contact portion 48A contacts the contact guide surface 42 of the open link 40 as described above.

  On the other hand, the contact portion 49A of the second arm 49 bends and raises the tip of the second arm 49 to the side opposite to the cover body 70, and the bent portion protrudes toward the latch mechanism 21 as shown in FIG. And has a U-shaped curved shape. The contact portion 49 </ b> A is disposed above the lift lever 63.

  The cancel lever 47 is urged by a torsion spring 47 </ b> A disposed between the cover main plate wall 71 and the cancel lever 47. Specifically, the cancel lever 47 is urged counterclockwise in FIG. 2, and urges the contact portion 48 </ b> A of the first arm 48 to always press against the contact guide surface 42 of the open link 40. Has been.

  When the door handles 17 and 18 are not opened in the unlocked state shown in FIG. 9, the contact portion 48 </ b> A of the cancel lever 47 contacts the flat portion 42 </ b> A of the contact guide surface 42. On the other hand, when the open link 40 is pushed up by the opening operation of the door handles 17, 18, the contact portion 48 </ b> A of the cancel lever 47 moves from the flat surface portion 42 </ b> A of the contact guide surface 42 to the curved surface portion 42 </ b> B. Then, the cancel lever 47 is slightly rotated in the counterclockwise direction in FIG. 9, and the contact portion 49 </ b> A provided on the second arm 49 of the cancel lever 47 is pulled away above the lift lever 63. Evacuate from the moving area. Accordingly, when the lift lever 63 is pushed up by the open link 40 in the unlocked state, the lift lever 63 and the contact portion 49A of the cancel lever 47 do not interfere with each other.

  Next, the operation of the vehicle door latch unit 20 configured as described above will be described. First, when the inside or outside door handles 17 and 18 are opened when the door 10 is closed and the vehicle door latch unit 20 is unlocked, the operation is as follows. As shown in FIG. 9, in the unlocked state, the active lever 34 is positioned at the unlocked position, and the open link 40 is in the standing posture. When the open link 40 is pushed upward by the opening operation of the door handles 17 and 18, the upper end of the open link 40 pushes up the lift lever 63, and the pole 24 moves to the latch release position (rotates clockwise in FIG. 8). ) As a result, the latch 23 can be turned to the unlatched position (clockwise direction in FIG. 8) side, and the door 10 can be opened.

  At this time, as the open link 40 moves up, the contact portion 48A of the cancel lever 47 contacts the curved surface portion 42B of the contact guide surface 42, so that the cancel lever 47 rotates counterclockwise in FIG. The contact portion 49 </ b> A provided in the second arm 49 is retracted from the rotation region of the lift lever 63. Therefore, the lift lever 63 and the cancel lever 47 do not contact each other.

  Next, when the door handles 17 and 18 are opened when the door 10 is closed and the vehicle door latch unit 20 is locked, the following occurs. As shown in FIG. 10, in the locked state, the active lever 34 is positioned at the locked position, and the open link 40 is in a tilted posture. When the door handles 17 and 18 are opened in this state, the open link 40 moves obliquely upward and passes through the side of the lift lever 63. Therefore, the lift lever 63 does not rotate, and the pole 24 does not move to the latch release position. That is, the opening operation of the door handles 17 and 18 is invalidated, and the door 10 cannot be opened.

  Next, the operation when the vehicle door latch unit 20 is locked with the door 10 opened and the door 10 is closed without opening the door handles 17 and 18 will be described. In this case, a cancel lock function for releasing the lock state is activated. Specifically, in the locked state shown in FIG. 10, the active lever 34 is positioned at the locked position, and the open link 40 is tilted. Further, since the door handles 17 and 18 are not opened, the contact portion 48A of the cancel lever 47 is abutted against the flat surface portion 42A of the contact guide surface 42 of the open link 40 as shown in FIG. The contact portion 49 </ b> A of the cancel lever 47 is in contact with or close to the lift lever 63.

  When the door 10 is closed as it is, the latch 23 is pushed by the striker 13, and the pawl 24 is pivoted to the latch releasing position while being in sliding contact with the latch 23, and the lift lever 63 is rotated together with the pawl 24. The tip of the lift lever 63 moves upward in FIG. Then, the lift lever 63 pushes up the contact portion 49A of the cancel lever 47, and the cancel lever 47 rotates counterclockwise in FIG. As a result, the contact portion 48A of the cancel lever 47 pushes the contact guide surface 42 of the open link 40 toward the latch mechanism 21, and the open link 40 is returned from the tilted posture to the standing posture shown in FIG. When pulled by 40, the active lever 34 is returned from the locked position to the unlocked position shown in FIG. In other words, the vehicle door latch unit 20 is canceled in the locked state in the process of closing the door 10 and is forcibly switched to the unlocked state.

  Incidentally, such a cancel lock type vehicle door latch unit 20 is generally attached to the door 10 of the front seat (driver seat, front passenger seat) of the vehicle. On the other hand, a car door latch unit 20 having a child protection specification is generally attached to the rear seat door of the vehicle. Here, “child protection” means that when the door 10 is unlocked, the opening operation of the inside door handle 17 is disabled while allowing the opening of the outside door handle 18 to allow the opening of the door 10. This is a mechanism for prohibiting the opening of the door 10 from the inside of the vehicle. The vehicle door latch unit 20 of the present invention can be changed to a part of the cancel lock type vehicle door latch unit 20 so that the housing 50 can be used as an electric child protection specification while being used in common. Yes.

  That is, an electric motor 95 for child protection can be attached to the case main plate wall 56 of the housing 50. In addition, a child protection specification inside open lever 65 can be assembled to the inside open lever common support shaft 60J provided in the cover body 70 in place of the cancel lock specification inside open lever 60. Further, a gear lever 90 (corresponding to the “seesaw lever” of the present invention) for connecting the electric motor 95 and the child protection lever 80 is provided in the common support shaft hole 71D of the cover main plate wall 71 in place of the cancel lever 47. Can be pivotally supported. Hereinafter, only differences from the vehicle door latch unit 20 including the cancel lock mechanism will be described.

  The electric motor 95 for child protection is attached to the space surrounded by the stator 44S of the electric motor 44, the latch mechanism 21, and the gear lever 90 in the case main plate wall 56. The electric motor 95 is attached such that its rotation output shaft 95J is substantially parallel to the case main body main plate wall 56. Further, the stator 95S of the electric motor 95 is disposed obliquely near the latch mechanism 21, and the rotation output shaft 95J extends obliquely downward toward the stator 44S of the electric motor 44. A worm gear 95G is fixed to the rotation output shaft 95J, and one end of the gear lever 90 is engaged therewith.

  In the cancel lock type vehicle door latch unit 20 described above, the contact portion 60B of the inside open lever 60 and the contact portion 32B of the outside open lever 30 can be directly contacted by the rotation of the inside open lever 60. It was. On the other hand, in the car door latch unit 20 of the child protection specification, they are not in direct contact with each other. Specifically, in the child protection specification, the abutting portion 65B of the inside open lever 65 and the abutting portion 32B of the outside open lever 30 are connected to the inside open lever common support shaft 60J that is the rotation shaft of the inside open lever 65. They are shifted in a parallel direction (a direction orthogonal to the paper surface of FIG. 15). The inside open lever 65 corresponds to the “inside operation special driven lever” of the present invention.

  A child protect lever 80 is disposed below the latch mechanism 21. The child protect lever 80 is connected to the inside open lever common support shaft 60J and a gear lever 90 described later. The child protect lever 80 can reciprocate between an unset position that allows transmission of force from the inside open lever 65 to the open link 40 and a set position that blocks transmission of force.

  Specifically, the child protect lever 80 includes a plate-shaped guide member 81. A guide groove 81A and a curved guide piece 82 are formed in the guide member 81. The guide groove 81A is formed on the distal end side of the guide member 81 and has a horizontally long shape and is open to the distal end side. The inside open lever common support shaft 60J passes through the guide groove 81A so as to be slidable. The position of the child protection lever 80 when the inside open lever common support shaft 60J is positioned on the open end side of the guide groove 81A as shown in FIGS. 13 and 15 is the set position, and as shown in FIGS. The unset position is when it is located at the back end of the guide groove 81A.

  The curved guide piece 82 extends downward from the middle portion of the guide member 81 in the longitudinal direction. The curved guide piece 82 has an arc shape centered on the inside open lever common support shaft 60J, and the distal end portion is divided into two portions to form a pair of locking flexible pieces 82A and 82A. The locking flexible pieces 82A and 82A can be elastically deformed in a direction approaching each other, and arrowhead-shaped locking portions 82B and 82B are formed at their tips. Further, in the guide member 81, an arc-shaped slit 83 centering on the inside open lever common support shaft 60J is formed between the curved guide piece 82 and the guide groove 81A.

  A slide member 84 is slidably attached to the curved guide piece 82. The slide member 84 has a structure in which a pair of sandwiching plates 84A and 84B sandwiching the curved guide piece 82 in the thickness direction are connected by mutually parallel legs (not shown). These leg portions can be brought into sliding contact with both side surfaces of the curved guide piece 82, respectively. The slide member 84 is attached by inserting both of the locking flexible pieces 82A and 82A from the distal end side of the curved guide piece 82 while being elastically deformed, and a locking portion 82B formed on the both locking flexible pieces 82A and 82A. , 82B.

  Of the slide member 84, a relay boss 85 (the “relay movable member of the present invention”) faces the case body main plate wall 56 from the holding plate 84B which is sandwiched between the curved guide piece 82 and the case body main plate wall 56. "Corresponding to") is formed protruding.

  When the child protect lever 80 is located at the unset position shown in FIG. 14, the relay boss 85 is disposed in the rotation region of the contact portion 65 </ b> B of the inside open lever 65. Accordingly, when the inside open lever 65 is rotated by the opening operation of the inside door handle 17, the contact portion 65 </ b> B presses the relay boss 85 from below, and the slide member 84 moves upward along the curved guide piece 82. . When the relay boss 85 is pressed against the contact portion 32B of the outside open lever 30 from below, the outside open lever 30 rotates in the clockwise direction in FIG. 3, and the open link 40 is pushed upward. That is, the operating force is transmitted from the inside open lever 65 to the open link 40. At this time, if the vehicle door latch unit 20 is unlocked, that is, if the open link 40 is in a standing posture (the active lever 34 is in the unlocked position), the lift lever 63 is pushed up by the open link 40 and the door 10 is opened from the inside of the vehicle. It becomes possible to do. On the other hand, if the vehicle door latch unit 20 is in a locked state, that is, if the open link 40 is tilted, the lift lever 63 is not pushed up as described above, and the door 10 cannot be opened from the inside of the vehicle.

  When the child protect lever 80 is located at the set position shown in FIG. 15, the relay boss 85 provided in the slide member 84 is retracted out of the rotation area of the contact portion 65 </ b> B of the inside open lever 65. Therefore, even if the inside open lever 65 is rotated by the opening operation of the inside door handle 17, the contact portion 65 </ b> B does not contact the relay boss 85. Further, the contact portion 65B of the inside open lever 65 does not directly contact the contact portion 32B of the outside open lever 30, so that the outside open lever 30 and the open link 40 are not pushed up. That is, transmission of the operating force from the inside open lever 65 to the open link 40 is blocked. Therefore, even if the vehicle door latch unit 20 is in the unlocked state, the door 10 cannot be opened by opening the inside door handle 17 in the vehicle.

  Of the child protection lever 80, a connecting projection 81C protruding toward the case body main plate wall 56 is formed at the base end of the guide member 81. The connection convex portion 81 </ b> C engages with a connection hole 92 </ b> A provided in the connection arm 92 of the gear lever 90.

  The gear lever 90 is pivotally supported by a gear lever support shaft 90J. The gear lever support shaft 90J can be assembled to a common support shaft hole 71D formed in the cover main plate wall 71 instead of the cancel lever support shaft 47J. The gear lever support shaft 90J includes a plurality of legs having a snap fit structure. These leg portions pass through a plurality of leg portion insertion holes provided in the gear lever 90, and in this state, the distal end portion is locked to the peripheral edge portion of the common support shaft hole 71D.

  The gear lever 90 includes a fan-shaped gear plate 91 extending upward from the gear lever support shaft 90J and a connecting arm 92 extending downward from the gear lever support shaft 90J. The sector gear plate 91 has a sector shape centered on the gear lever support shaft 90J, and a gear 91G is formed on the outer peripheral surface thereof. A worm gear 95G provided on the rotation output shaft of the electric motor 95 is engaged with the gear 91G.

  A connecting hole 92A is formed through the lower end of the connecting arm 92, and a connecting projection 81C protruding from the base end of the child protection lever 80 (guide member 81) is received.

  The driving force of the electric motor 95 is transmitted to the child protect lever 80 by the gear lever 90, and the child protect lever 80 is electrically switched between the set position and the unset position.

  Specifically, when the gear protector 80 is rotated in the clockwise direction in the figure by the electric motor 95 when the child protect lever 80 is at the unset position shown in FIG. 12, the child protect lever 80 is pulled by the connecting arm 92. To the set position (state shown in FIG. 13). At this time, the boss 91A protrudingly formed on the sector gear plate 91 passes through the constricted portion of the click spring 93 fixed to the case body main plate wall 56, and restricts the return to the unset position.

  Further, when the gear protector 80 is rotated counterclockwise by the electric motor 95 when the child protect lever 80 is at the set position shown in FIG. 13, the child protect lever 80 is pushed by the connecting arm 92 and unset. Switch to the position (state in FIG. 12). At this time, the boss 91 </ b> A passes through the constricted portion of the click spring 93 while passing therethrough and restricts the return to the set position.

  As described above, according to the present embodiment, the vehicle door latch unit 20 is assembled to the inside open lever common support shaft 60J and the common support shaft hole 71D of the housing 50 when the cancel lock specification and the child protection specification are used. Since the components can be rearranged, the housing 50 can be shared, and the cost of components related to the housing 50 can be reduced. Therefore, it is possible to suppress an increase in product price associated with making the child protection electric.

  In addition, since the rotation output shafts 44J and 95J of the electric motors 44 and 95 are mounted so as to be parallel to the case main body main plate wall 56, it is possible to prevent an increase in size in a direction orthogonal to the case main body main plate wall 56. it can.

  Further, the housing 50 can be divided into a case body 50A and a cover body 70, and parts (active lever 34 and open link 40) that are commonly used in the cancel lock specification and the child protection specification can be assembled to the case body 50A. Since the parts (gear lever 90 and cancel lever 47) that can be reassembled according to the child protection specification and the cancel lock specification can be assembled to the cover body 70, the assembling workability can be improved. Can do.

  In addition, the vehicle door latch unit 20 illustrated in this embodiment has the following configuration. That is, in the region opposite to the inside open lever common support shaft 60J (first common support shaft portion) with respect to the lift lever 63 (pole drive lever) in the housing 50 (mechanism base), a common support shaft hole 71D ( The stator 95S of the electric motor 95 is disposed closer to the mechanism case 22 (fixed base) with respect to the second common spindle portion), and the rotation output shaft 95J of the electric motor 95 is the case main plate wall 56 of the housing 50. The worm gear 95G is fixed to the rotary output shaft 95J of the electric motor 95 so as to be integrally rotatable, and is extended to one end of the gear lever 90. It is the vehicle door latch unit 20 in which the fan-shaped gear board 91 meshed | engaged with this was formed.

  A worm wheel 45 is rotatably supported around a rotation axis substantially orthogonal to the case main plate wall 56 on the opposite side of the housing 50 to the common support shaft hole 71D. The stator 44S of the electric motor 44 is disposed on the opposite side of the worm gear 95G from the stator 95S of the electric motor 95, and the rotation output shaft 44J of the electric motor 44S is parallel to the case main plate wall 56. The worm gear 44G is fixed to the rotation output shaft 44J of the electric motor 44 so as to be integrally rotatable and meshed with the worm wheel 45. The housing 50 is disposed between the inside open lever common support shaft 60J and the common support shaft hole 71D. At the same time, coupled to the worm wheel 45 so as to be capable of interlocking rotation, receiving the power of the electric motor 44, Punrinku 40 (lock switching members) unlocking position and the locking position and the active lever 34 that can be switched to a is a vehicle door latch unit 20 provided.

  Further, the housing 50 can be divided into a pair of case bodies 50A and a cover body 70 (one pair of mechanism base constituent bodies) in the advancing and retracting direction of the striker 13, and the cover body 70 (one mechanism base constituent body) is divided into The inside open lever common support shaft 60J and the common support shaft hole 71D are provided, and the guide member 81 can be assembled. The case body 50 (the other mechanism base constituent body) has the lift lever 63 and the outside open lever 30 (outside operation). This is a vehicle door latch unit 20 in which a driven lever) and an open link 40 can be assembled.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) In the above-described embodiment, the electric motor 44 and the worm wheel 45 for switching the lock are provided. However, the present invention may be applied to a vehicle door latch unit that does not include them.

  (2) Although the inside open lever common support shaft 60J as the “first common support shaft portion” of the present invention is supported by the cover body 70, it may be supported by the case main body portion 55. In addition, the first common support shaft portion is formed in the cover body 70 or the case main body portion 55, and includes a support hole that can support the shaft body that rotatably supports the inside open levers 60 and 65 in an upright state. May be.

  (3) The “second common support shaft portion” of the present invention is the common support shaft hole 71D formed in the cover body 70, but the shaft body standing from the cover body 70 or the case body 55 is referred to as “second common support shaft portion”. It may be a “support shaft”.

The top view of the vehicle door latch unit which concerns on one Embodiment of this invention A perspective view of a vehicle door latch unit with cancel lock Side view of vehicle door latch unit Side view of case body (A) Front view of case body, (B) Front view of cover body Front view of the latch mechanism when the latch is in the unlatched position Front view of the latch mechanism when the latch is in the half-latch position Front view of the latch mechanism when the latch is in the latch position Front view of the vehicle door latch unit in the unlocked state Front view of the vehicle door latch unit in the locked state Partial enlarged front view of the vehicle door latch unit in the locked state Front view of car door latch unit with child protection Front view of car door latch unit with child protection Front view of the child protection lever in the unset position Front view of the child protection lever in the set position

Explanation of symbols

10 door 13 striker 20 vehicle door latch unit 21 latch mechanism 22 mechanism case (fixed base)
23 Latch 24 Pole 30 Outside open lever (outside operation follower lever)
34 Active lever 34J Active lever support shaft 40 Open link (lock switching member)
44 Electric motor 44G Worm gear 44J Rotation output shaft 44S Stator 45 Worm wheel 47 Cancel lever (cancel rotating member)
47J Cancel lever support shaft 50 Housing (mechanism base)
55 Case body 60 Inside open lever (inside operation normal follower lever)
60J Inside open lever common spindle (first common spindle)
63 Lift lever (pole drive lever)
65 Inside open lever (inside operation special follower lever)
70 cover body 71D common spindle hole (second common spindle part)
80 Child protect lever 81 Guide member 81A Guide groove 84 Slide member 85 Relay boss (relay movable member)
90 Gear lever (seesaw lever)
90J Gear lever support shaft 91 Fan-shaped gear plate 95 Electric motor (motor)
95G Worm gear 95J Rotation output shaft 95S Stator

Claims (1)

A fixed base fixed to an end wall of a vehicle door from the inside and a mechanism base protruding from the fixed base toward the rotation center of the door are integrally provided, and a latch and a pole are supported by the fixed base. In addition, a lock mechanism component for bringing the door into a locked state is supported by the mechanism base, and the pawl is engaged with the striker and the latch that move forward and backward through a slit formed in the end wall of the door. Is locked to the latch to hold the door in a closed state, and by operating either the inner operation handle or the outer operation handle of the door, the lock of the pole with respect to the latch is released, and When the door can be opened and the door is locked, the lock mechanism transmits the operation force between the pole and the outer operation handle. The vehicle door latch unit to prohibit the opening of the door is blocked,
A pole drive lever that rotates integrally with the pole;
An outer operation driven lever that is rotatably supported by the mechanism base and rotates to the side approaching the pole drive lever by operation of the outer operation handle;
A base end portion is pivotally supported by the outer operation follower lever, and a distal end portion is tilted to a side away from the fixed base with respect to the lock release position with respect to the lock release position and the lock release position. A lock switching member capable of reciprocating between a lock position where a tip portion is displaced from the pole drive lever; and
A first common support shaft disposed on the fixed base side of the base end portion of the lock switching member and rotatably supporting a component;
A second common support shaft portion that is disposed on the side of the pole drive lever from the lock switching member and at a position away from the fixed base from the pole drive lever, and rotatably supports a component;
The parts to be assembled to the first common support shaft part and the second common support shaft part can be recombined between the cancel lock specification and the child protection specification.
In the case of the cancel lock specification,
The first common support shaft is rotated by the operation of the inner operation handle, and the outer operation driven lever can always be rotated to the side approaching the pole drive lever. As the lever is assembled,
The pole driving lever that rotates in the closing process of the door when the door is closed after the door is opened and the lock switching member is disposed at the lock position after the door is opened. A cancel rotation member that is rotated by being pushed and that pushes the lock switching member back to the unlocked position is assembled.
In the case of the child protection specification,
Only when the first common support shaft is rotated by the operation of the inner operation handle to approach the outer operation follower lever and a relay movable member is disposed between the first operation support lever and the outer operation follower lever. In addition, an inner operation special driven lever capable of rotating the outer operation driven lever to the side approaching the pole drive lever is assembled,
A seesaw lever is rotatably attached to the second common support shaft.
Furthermore, in the case of the child protection specification, the mechanism base includes
A motor having a rotation output shaft that is disposed on a side farther from the inner operation normal follower lever than the seesaw lever and is gear-coupled to one end of the seesaw lever;
A guide member connected to the other end of the seesaw lever and supported so as to reciprocate with respect to the mechanism base as the seesaw lever is rotated by the motor is assembled.
The relay movable member is supported by the guide member so as to be integrally movable, and when the guide member is positioned at one end of the reciprocable range, the inner operation special driven lever and the outer operation driven lever. When the guide member is positioned at the other end of the reciprocable range, the operation force generated by the operation of the inner operation handle is transmitted between the inner operation special driven lever and the outer operation driven lever. A vehicle door latch unit that blocks transmission of the operating force.

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