JP5014082B2 - Vehicle door latch device - Google Patents

Description

  The present invention relates to a vehicle door latch device that is disposed on a vehicle door and holds the vehicle door in a closed state with respect to a vehicle body.

Conventionally, this type of vehicle door latch device includes a striker housed in a body and disposed in a vehicle, a latch detachable, a ratchet housed in the body and detachably disposed in the body, and a body And an inner opening lever linked to an inner opening handle disposed in the vehicle through an inner opening through-hole. The ratchet and the inner door opening lever are supported on the body so as to be rotatable coaxially, and a protrusion cut and raised in the front direction is formed on a part of the inner door opening handle. The protrusion is pushed up the release piece formed on the ratchet, whereby the inner door handle is configured to rotate integrally with the ratchet.
JP-A-6-73936

  However, in the above-described vehicle door latch device of Patent Document 1, in order to integrally rotate the inner door handle and the ratchet, it is necessary to form a protrusion on the inner door handle that engages with the release piece of the ratchet. There is. And these need to be stored in the body. For this reason, in manufacturing the inner door opening handle, processes such as bending and the accuracy of the processing are required. Further, it is necessary to form the housing so that the open lever can be accommodated. Therefore, there is a risk that the cost may increase due to an increase in man-hours, the quality may deteriorate due to the addition of processes, and the housing may increase in size due to expansion of the storage space.

  Therefore, the present invention provides a vehicle door latch device that can rotate the open lever and the pole integrally with a simpler structure, and that is inexpensive and excellent in operation reliability. Let it be an issue.

  The first technical means taken in order to solve the above technical problem includes a latch that is rotatably supported by a housing attached to a vehicle door and is engaged with and disengaged from a striker attached to the vehicle body, and the housing. A vehicle door latch device comprising: a pole rotatably supported by the latch; and an open lever having one end linked to a handle disposed on the vehicle door and the other end linked to the pole. The shaft has a shaft portion that is rotatably supported by the housing and fixed to the one end side of the housing, and the open lever is fixed to the other end portion of the housing so as to rotate integrally with the pole. It is.

  Preferably, the housing has a contacted portion that restricts rotation in one direction of either the pole or the open lever.

  More preferably, it has a linkage portion that links with the handle disposed at one end portion of the open lever, and a contact portion that contacts the contacted portion disposed at the other end portion of the open lever. And it is good to arrange | position the said axial part in the intermediate part of the said linkage part and the said contact part.

  More preferably, the open lever may be linked to a locking / unlocking mechanism that transmits or does not transmit the operation force of the handle to the open lever.

  More preferably, the linkage part and the locking / unlocking mechanism may be connected via a cable.

  According to the present invention, the pole is fixed to one end side in the housing and is pivotally supported by the housing, and the shaft is fixed to the other end portion outside the housing so that the open lever rotates integrally with the pole. Since it comprised in this way, the pole arrange | positioned in the housing and the open lever arrange | positioned outside the housing can be rotated integrally with a shaft part. Thereby, rotation of an open lever can be transmitted to a pole through a shaft part without waste. Therefore, it is possible to provide a vehicle door latch device that has improved operation efficiency compared to the prior art. In this structure, there is no need to newly form a protrusion or the like that engages with the pole on the open lever as in the conventional case, and a simple structure can be achieved.

  Furthermore, if the housing is formed to have a contacted portion that restricts rotation in one direction of either the pole or the open lever, one direction of either the pole or the open lever is achieved. It is possible to restrict the rotation of both members in one direction only by restricting the rotation of the two members. Therefore, it is possible to provide a vehicle door latch device in which the number of parts is reduced as compared with the prior art.

  An embodiment in which a door latch device 100 according to the present embodiment is attached to a vehicle door 3 slidably supported on a side surface of a vehicle body 1 will be described below with reference to the drawings.

  The door latch device 100 of this embodiment shown in FIGS. 1 and 2 is attached to the vehicle body 1 by a housing 4 attached to the rear end portion of the vehicle door 3. The housing 4 of the door latch device 100 includes a base plate 10 attached to the vehicle door 3, a body 20 fixed to the base plate 10, and a sub-base 30 fixed to the base plate 10. The door latch device 100 includes a latch 21, a pole 22 that is detachably supported by the latch 21, and an open lever 40 that rotates integrally with the pole 22.

  As shown in FIG. 3, the latch 21 has a U-shaped groove 211 that is pivotally supported on the base plate 10 so as to be rotatable about a latch shaft 213 and engages with a striker 2 provided on the vehicle body 1. Yes. Further, the latch 21 is always urged clockwise in FIG. 3 to release the engagement with the striker 2 by a spring (not shown) provided around the latch shaft 213 which is the rotation center.

  The pole 22 has a claw portion 221 that is pivotally supported on the base plate 10 so as to be rotatable about a shaft portion 50 that will be described in detail later, and that engages with the latch 21. Further, the pawl 22 is always urged counterclockwise in FIG. 3 so that the claw portion 221 engages with the latch 21 by a spring (not shown) wound around the shaft portion 50.

  The open lever 40 is pivotally supported on the base plate 10 so as to be rotatable about a shaft portion 50 which will be described in detail later, and an arc-shaped elongated hole portion 42 (linkage portion) is formed at one end thereof. A contact portion 41 is formed at the end by bending.

  The body 20 includes a cutout portion 20a cut out so that the striker 2 can pass, and an accommodation recess 20b formed continuously from the cutout portion 20a. The housing recess 20 b houses the latch 21 and the pole 22.

  The housing 4 will be described in detail.

  As shown in FIGS. 1 and 2, the base plate 10 includes a horizontal portion 11 attached to the vehicle door 3 and a vertical portion 12 formed by bending the horizontal portion 12 integrally in a substantially vertical direction. ing. Further, as shown in FIG. 4, the sub-base 30 includes an attachment portion 31 having attachment holes 311 (three in the present embodiment) that are subjected to burring processing on the upper side in order to be fixed to the base plate 10. And a cover portion 32 that accommodates the body 20 and is formed by bending. The sub-base 30 is attached to the base plate 10 by directly fixing the attachment portion 31 to the horizontal portion 11 via the attachment holes 311 with screws while sandwiching the body 20 with the base plate 10. Thereby, for example, since the resin-made body 20 is not sandwiched between the base plate 10 and the mounting portion 31, it is possible to suppress the play due to the deformation caused by creep that occurs at the time of screw tightening. Furthermore, since there is no need to interpose another part such as a metal collar for preventing backlash between the base plate 10 and the sub-base 30, the number of parts can be reduced.

  As shown in FIG. 4, the cover portion 32 of the sub-base 30 is formed with a central portion cut out in a U-shape, and has a first hole portion 321 a through which the latch shaft 213 is rotatably inserted. The cover part 321 and the 2nd cover part 322 which has the hole part 322a in which the axial part 50 is rotatably inserted are provided. Further, the second cover portion 322 is formed by partially erecting a stopper portion 322b (contacted portion). The stopper portion 322b is covered with a rubber cap 323 having elasticity, and is disposed so as to be able to contact the contact portion 41 of the open lever 40.

  The shaft portion 50 will be described in detail.

  As shown in FIGS. 1 to 3, the shaft portion 50 is erected rotatably on the base plate 10 so as to penetrate the body 20 and the hole portion 322 a of the sub-base 30. The pole 22 is fixed to one end of the shaft portion 50 located in the housing recess 20 b of the body 20 so as to rotate integrally, and the open lever 40 is attached to the other end of the shaft portion 50 located outside the housing 4. Are fixed so as to rotate integrally. Thereby, the pole 22 and the open lever 40 are integrally rotated via the shaft portion 50.

  The cable 60 is formed so as to have flexibility, and one end of the cable 60 is connected to a locking / unlocking mechanism 200 described later through the vehicle door 3. The other end is formed with a bent portion 61 that is inserted into the elongated hole portion 42 of the open lever 40. A plastic snap 62 having a diameter larger than the radial width of the elongated hole portion 42 is attached to the bent portion 61.

  As shown in FIG. 5, the locking / unlocking mechanism 200 includes a handle 300 attached to the vehicle door 3, a front lock mechanism 210 disposed at the front end of the vehicle door 3, the door latch device 100 of this embodiment, and the vehicle door 3. A fully open lock mechanism 220 arranged at the lower part of the front end is connected to each other. The locking / unlocking mechanism 200 is configured to transmit or block the operating force of the handle 300 to the locks 100, 210, and 220. The front lock mechanism 210 closes the front end of the vehicle door 3 and the vehicle body 1 in order to hold the vehicle door 3 in a closed state, and its structure is substantially the same as that of the door latch device 100.

  Next, the operation when opening and closing the vehicle door 3 will be described below.

  First, the operation when the vehicle door 3 is changed from the open state to the closed state will be described.

  The opened vehicle door 3 is held in a fully opened state by a fully opened lock mechanism 220. When the handle 300 is operated in this state, the operating force is transmitted to the fully open lock mechanism 220 via the locking / unlocking mechanism 200. As a result, the fully open lock mechanism 220 releases the fully open state of the vehicle door 3. Accordingly, the vehicle door 3 is slidable in the front-rear direction.

  When the vehicle door 3 is slid forward and the vehicle door 3 is closed, the vehicle door 3 is kept closed from the front by the front lock mechanism 210.

  Along with this, the latch 21 of the door latch device 100 attached to the vehicle door 3 is engaged with the striker 2 attached to the vehicle body 1, whereby the vehicle door 3 is kept closed from the rear.

  As described above, the vehicle door 3 is held in the closed state with respect to the vehicle body 1 by the front lock mechanism 210 and the door lock device 100.

  Next, a description will be given of the case where the vehicle door 3 is changed from the closed state to the open state.

  The vehicle door 3 is held in a closed state by engaging the front lock mechanism 210 at the front of the vehicle door 3 and engaging the door lock device 100 and the striker 2 at the rear of the vehicle door 3. When the handle 300 is operated in this state, the operating force is transmitted to the front lock mechanism 210 and the door lock device 100 via the locking / unlocking mechanism 200. As a result, the front lock mechanism 210 and the door lock device 100 release the fully closed state of the fully closed vehicle door 3. Accordingly, the vehicle door 3 is slidable in the rear direction.

  When the vehicle door 3 is slid rearward and the vehicle door 3 is fully opened, the vehicle door 3 is kept fully open from the rear by the fully open lock mechanism 220 of the vehicle door 3.

  Next, the operation of the door latch device 100 of this embodiment will be described.

  First, a description will be given of when the vehicle door 3 is changed from the open state to the closed state.

  When the vehicle door 3 is slid forward, the striker 2 of the vehicle body 1 passes through the groove 211 of the latch 21 and contacts the wall of the groove 211. When the sliding of the vehicle door 3 further proceeds, the latch 21 is rotated counterclockwise as shown in FIG. 3 against the urging force of the spring by the striker 2. The pole 22 is rotated clockwise by the rotation of the latch 21 against the urging force of the spring. As the rotation further proceeds, the pawl portion 221 of the pole 22 engages with the engaged portion of the latch 21, whereby the clockwise rotation of the latch 22 is restricted and the vehicle door 3 is held in the closed state. .

  On the other hand, the open lever 40 that rotates integrally with the shaft portion 50 that is the rotation axis of the pole 22 also rotates in the counterclockwise direction shown in FIG. At this time, since the bent portion 61 of the cable 60 is inserted into the elongated hole portion 42 of the open lever 40, the bent portion 61 only moves relatively within the elongated hole portion 42, and no operating force is transmitted to the cable 60. . That is, the open lever 40 is swung with respect to the cable 60.

  Next, a description will be given of the case where the vehicle door 3 is changed from the closed state to the open state with respect to the vehicle body 1.

  The handle 300 is operated with the vehicle door 3 closed with respect to the vehicle body 1. By operating the handle 300, the cable 60 of the door lock device 100 is pulled leftward in FIG. As a result, as shown in FIG. 2, the open lever 40 is rotated counterclockwise about the shaft portion 50 via the bent portion 61 of the cable 60.

  The pole 22 integrally fixed to the shaft portion 50 by the rotation of the open lever 40 is also rotated clockwise in FIG. Thereby, the engagement between the pawl portion 221 of the pole 22 and the engaged portion 212 of the latch 21 is released.

  When the engagement between the latch 21 and the pole 22 is released, the latch 21 is rotated clockwise by the biasing force of the spring.

  The striker 2 is disengaged from the groove 211 by the rotation of the latch 21. As a result, the vehicle door 3 is released from the closed state with respect to the vehicle body 1 and is slidable rearward.

  As described above, according to the vehicle door latch device 100 of the present embodiment, the body 22 is rotatably supported, the pole 22 is fixed to the inner end portion of the body 20, and the open lever 40 to the outer end portion of the body 20. Since the shaft portion 50 is fixed so as to rotate integrally with the pole 22, the pole 22 disposed inside the body 20 and the open lever 40 disposed outside the body 20 are pivoted. It can be rotated together with the part 50. Thereby, the rotation of the open lever 40 can be transmitted to the pole 22 through the shaft portion 50 without waste. Therefore, it is possible to provide the door latch device 100 with improved operation efficiency as compared with the prior art. In this structure, there is no need to newly form a protrusion or the like that engages with the pole as in the conventional case, and a simple structure can be achieved.

  Further, since the sub-base 30 is formed to have a stopper member 321 that restricts the rotation of one of the pole 22 and the open lever 40 in one direction, By restricting the rotation in one direction, the rotation in both directions can be restricted. Therefore, it is possible to provide the door latch device 100 in which the number of parts is reduced as compared with the related art.

  As another embodiment, as shown in FIG. 6, the operating force of the handle 300 is satisfactorily unlocked by arranging the cable 60 in the vehicle door 3 by a bell crank 500 attached to an appropriate place of the vehicle door 3. It is possible to realize the arrangement of the cable 60 that can be transmitted to the mechanism 200 and has a higher degree of freedom.

  In this embodiment, since the cable 60 is directly connected to the open lever 40, the number of parts can be minimized.

  In the present embodiment, an example in which the latch 21 and the striker 2 are disengaged by operating the handle 300 has been described. However, the present invention is not limited to this example. For example, as shown in FIG. By doing so, the engagement between the latch and the striker may be released by driving the motor.

  In this embodiment, the pole 22, the open lever 40, and the shaft portion 50 are separately described. However, the present invention is not limited to this example. For example, the shaft portion 50 is formed integrally with the pole 22. Alternatively, the shaft portion may be formed integrally with the open lever 40.

It is a perspective view of the door latch apparatus of a present Example. It is the perspective view which showed the aspect of the door latch apparatus when operating the vehicle door of a present Example from a closed state to an open state. It is a front view inside the body of the door latch device of a present Example. It is a perspective view of the sub base of the door latch apparatus of a present Example. It is a schematic diagram when the door latch apparatus of a present Example is attached to the door. It is the other Example in FIG.

Explanation of symbols

Vehicle body 1
Striker 2
Vehicle door 3
Housing 4
Latch 21
Paul 22
Stopper part (contacted part) 322b
Open lever 40
Long hole part (linkage part) 42
Shaft 50
Cable 60
Door latch device 100
Locking and unlocking mechanism 200
Handle 300

Claims (5)

A latch that is rotatably supported by a housing attached to a vehicle door and is attached to and disengaged from a striker attached to a vehicle body; a pole that is rotatably supported by the housing and is attached to and detached from the latch; and the vehicle door In a vehicle door latch device having an open lever having one end linked to a disposed handle and the other end linked to the pawl, the pawl is fixed to one end of the housing and is rotatably supported by the housing. A vehicle door latch device comprising a shaft portion fixed to the other end portion outside the housing so that the open lever rotates integrally with the pole. 2. The vehicle door latch device according to claim 1, wherein the housing includes a contacted portion that restricts rotation of one of the pole and the open lever in one direction. A link part that links with the handle disposed at one end of the open lever, and a contact part that contacts the contacted part disposed at the other end of the open lever, and the link The vehicle door latch device according to claim 2, wherein the shaft portion is disposed at an intermediate portion between the contact portion and the contact portion. The vehicle door latch device according to any one of claims 1 to 3, wherein the open lever is linked to a locking / unlocking mechanism that transmits or does not transmit the operation force of the handle to the open lever. The vehicle door latch device according to claim 4, wherein the linkage portion and the locking / unlocking mechanism are connected via a cable.

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