JP5005804B2 - Vehicle door latch device - Google Patents

Description

  The present invention relates to a vehicle door latch device, and more particularly to an anti-panic mechanism for a vehicle door latch device.

  In the conventional general vehicle door latch device, the unlocking operation by the inner lock button or the like is not normally completed in a state where the outer door opening handle of the door is opened. Such a state is called a panic state in the industry. When the panic state occurs, it is necessary to return the outer door opening handle to the non-operating state and then perform the unlocking operation again with the inner lock button or the like.

  Patent Literature 1 and Patent Literature 2 disclose a door latch device provided with an anti-panic mechanism for preventing the panic state. The known anti-panic mechanism is in an unlocked state so that if the outer door opening handle is returned to the non-operating state even if the unlocking operation is not normally completed by the door opening operation of the outer door opening handle, this is followed. By completing the switching to, the unlocking operation again becomes unnecessary.

Japanese Utility Model Publication No. 58-101949 JP 11-324451 A JP 2004-44360 A US Pat. No. 5,803,515

  The known mechanism includes a spring-biased working piece to achieve an anti-panic mechanism, and the working piece is pivoted to an existing part of the door latch device with a pivot pin dedicated to the working piece. There were many parts.

  Therefore, the present invention includes an open lever 27 that is displaced by an opening operation of the outer door opening handle 28 of the door, a lock lever 30 that rotates about the lock shaft 31 and switches between the unlock position U and the lock position L. When the lock lever 30 is in the unlock position U, the displacement of the open lever 27 is switched to an engagement position where the displacement of the open lever 27 can be transmitted to the ratchet 13. When the lock lever 30 is in the lock position L, the displacement of the open lever 27 is not transmitted to the ratchet 13. An open link 40 that switches to a non-engagement position is connected to the lock lever 30 so as to be interlocked by the elasticity of the anti-panic spring 36, and the lock position L and the unlock position U of the lock lever 30 are connected. An operating piece 35 for transmitting the switching to the open link 40, and the open lever 27 is opened. When the lock lever 30 is switched from the lock position L to the unlock position U while being displaced by the operation, the operating piece 35 and the open link 40 are not switched because the anti-panic spring 36 is elastically displaced. When the lock lever 30 is switched to the unlock position U, the operating piece 35 is disposed so as to rotate about the lock shaft 31, and the open link 40 is in contact with the ratchet 13 side. A contact surface 42 capable of transmitting the displacement of the open lever 27 to the ratchet 13 by contact and a wall 44 capable of restricting switching of the open link 40 to the unlock position by contact with the ratchet 13 side; The wall 44 extends from the side surface of the open link 40 in the axial direction of the lock shaft 31. When the opening operation of the open lever 27 is returned, the wall 44 is released from contact with the ratchet 13 side, and the unlock position U of the open link 40 and the operating piece 35 is released. Therefore, the open link 40 and the operating piece 35 are both switched to the unlock position U by the elastic force of the anti-panic spring 36.

  In the present invention, the operating piece 35 urged by the anti-panic spring 36 is fixed by the lock shaft 31 common to the lock lever 30. This eliminates the need for a dedicated member that pivots the operating piece 35. Further, since the lock lever 30 is switched between the lock position and the unlock position by rotating around the lock shaft 31, the place where the lock lever 30 overlaps with the lock lever 30 is a place suitable for the installation of the rotating member, Therefore, it is extremely reasonable to place the operating piece 35 on the lock shaft 31 and to arrange the operating piece and the lock lever 30 together.

FIG. 1 is a front view of a door latch assembly according to the present invention. FIG. 2 is a rear view showing members provided on the rear side of the door latch assembly. FIG. 3 is a sectional view showing a contact surface and a passage of an open link of the latch assembly. FIG. 4 is a layout view of each member in a locked state. FIG. 5 is a layout view showing a state in which the open lever is opened and rotated in the locked state. FIG. 6 is a layout view showing a state in which the lock lever is switched to the unlock position in the state of FIG. 5.

  FIG. 1 shows a front view of a door latch device according to the present invention. The door latch device comprises a latch assembly 10 attached to a door (not shown) and a striker 11 fixed to a vehicle body (not shown). The latch assembly 10 includes a latch 12 that engages with the striker 11 when the door is closed, and a ratchet 13 that holds the engagement between the latch 12 and the striker 11. The latch 12 is rotatably accommodated in a recess 15 formed on the surface of the latch body 14 by a latch shaft 16 in the front-rear direction, and the ratchet 13 is rotatably accommodated in the recess 15 by a ratchet shaft 17 in the front-rear direction. The

  The latch 12 is urged clockwise in FIG. 1 by the elasticity of the latch spring 18, and the ratchet 13 is urged counterclockwise by the elasticity of the ratchet spring 19. The latch 12 in FIG. 1 is in the unlatched position (door opening position) by the elasticity of the latch spring 18, and when the door is moved toward the door closing position, the striker 11 contacts the U-shaped groove 20 of the latch 12, thereby latching. When the latch 12 rotates counterclockwise and the latch 12 rotates to the half latch position, the ratchet 13 engages with the first step 21 of the latch 12 so that the door is in the half closed position, and when the latch 12 reaches the full latch position. The ratchet 13 is engaged with the second step 22 of the latch 12, and the door is held in the fully closed position.

  The ratchet 13 has a ratchet pin 24 that protrudes to the back side of the latch body 14 through the opening 23 of the latch body 14. A metal cover plate 25 that covers the recess 15 is fixed to the surface of the latch body 14. The cover plate 25 is partially shown in FIG.

  A metal back plate 26 shown in FIG. 2 is fixed to the back surface of the latch body 14. The back plate 26 includes a parallel plate 26A substantially parallel to the cover plate 25, and the front and rear of the latch body 14 are sandwiched between the cover plate 25 and the parallel plate 26A. A bent plate 26 </ b> B that extends rearwardly away from the latch body 14 is provided on the indoor side of the parallel plate 26 </ b> A.

  An open lever 27 is fixed to the parallel plate 26A (latch body 14) by the latch shaft 16 or another shaft. The open lever 27 is connected to an outer door opening handle 28 and an inner door opening handle 29 of the door, and rotates counterclockwise in FIG.

  Reference numeral 30 denotes a lock lever, which is fixed to the parallel plate 26A (latch body 14) by a lock shaft 31. The lock shaft 31 can also be used as the ratchet shaft 17. The lock lever 30 is disposed between the parallel plate 26 </ b> A and the latch body 14. The lock lever 30 is connected in relation to the inner lock button 32 (and possibly the door key cylinder 33), and by these operations, the lock lever 30 is displaced to the lock position L or the unlock position U with the dead center of the over center spring 34 as a boundary. Retained.

  An anti-panic working piece 35 is fixed to the lock shaft 31. The main portion of the operating piece 35 is disposed on the back side of the parallel plate 26 </ b> A, and an anti-panic spring 36 is provided between the operating piece 35 and the lock lever 30. The coil portion 36A of the spring 36 is wound around the lock shaft 31, the one leg portion 36B is brought into contact with the convex portion 37 of the lock lever 30 protruding rearward beyond the parallel plate 26A, and the other leg portion 36C is The operating piece 35 is brought into contact with the convex portion 38. The operating piece 35 is urged in the unlocking direction by the spring 36 and is elastically held in a state of being in contact with the lock lever 30.

  The operating piece 35 is integrally formed with a pin portion 39 protruding forward (front side), and the pin portion 39 is slidably engaged with the back side guide slot 41 of the open link 40. The upper part of the open link 40 is fixed to the open lever 27. When the operating piece 35 is displaced together with the lock lever 30 to the lock position (FIGS. 4 and 5) or the unlock position (FIGS. 2 and 3) by the elasticity of the spring 36, the open link 40 is also displaced to the lock position or the unlock position.

  A contact surface 42 is provided on the front side of the open link 40. When the open link 40 is in the unlocked position (FIGS. 2 and 3), the contact surface 42 faces the ratchet pin 24 so that it can be engaged in the vertical direction, and the open link 27 is moved downward by the rotation of the open lever 27. Then, the contact surface 42 pushes down the ratchet pin 24 to release the ratchet 13 from the latch 12, thereby opening the door. When the open link 40 is displaced to the lock position (FIGS. 4 and 5), the contact surface 42 moves to the side of the ratchet pin 24, and therefore the door cannot be opened even if the open link 40 is moved downward.

  A passage 43 of the ratchet pin 24 is formed on the front side of the open link 40. When the open link 40 moves downward when the open link 40 is in the locked position, the ratchet pin 24 moves relatively up in the passage 43. To do. A blocking wall 44 is formed on the side surface of the passage 43 on the lock position side, and restricts the open link 40 from being returned to the unlock position in a state where the ratchet pin 24 is relatively moved up in the passage 43.

  Next, the operation will be described. In the unlocked state of FIG. 2, when the inner lock button 32 or the like is locked, the lock lever 30 rotates clockwise and moves to the lock position L beyond the dead center of the over center spring 34, whereby the operating piece 35 is also locked. Further, the open link 40 is displaced to the right and moved to the lock position, and the locked state shown in FIG. 4 is obtained.

  When the outer door opening handle 28 or the inner door opening handle 29 is operated to open in the locked state, the open lever 27 rotates counterclockwise as shown in FIG. 5, and the open link 40 moves downward. However, in the locked state, the contact surface 42 of the open link 40 is in a state of not facing the ratchet pin 24, so the ratchet pin 24 does not move downward, and therefore the door is not opened.

  In the locked state, when the outer door opening handle 28 or the inner door opening handle 29 is opened to enter the state shown in FIG. Thus, the displacement of the lock lever to the unlock position is not completed. On the other hand, in the present invention, when the inner lock button 32 or the like is unlocked in the state of FIG. 5, the lock lever 30 remains alone with the operating piece 35 in the locked position as shown in FIG. It is displaced to the unlock position U.

  That is, as shown in FIG. 5, when the open link 40 moves downward in the locked state, the ratchet pin 24 enters the passage 43 of the open link 40, thereby restricting the switching of the open link 40 to the unlock position. In addition, the operation piece 35 in which the pin portion 39 is engaged with the guide slot 41 of the open link 40 is also in a state where switching to the unlock position is restricted. For this reason, the lock lever 30 is displaced to the unlock position alone as shown in FIG. 6 by the unlocking operation of the inner lock button 32 or the like while the anti-panic spring 36 is elastically widened, and thereafter, the over center spring 34. Is held at the unlocked position U by the elasticity of.

  Thus, in the state of FIG. 6, when the outer door opening handle 28 or the inner door opening handle 29 is returned from the door opening operation position, the open lever 27 rotates clockwise and the open link 40 moves upward. Accordingly, the ratchet pin 24 that has entered the passage 43 of the open link 40 is detached from the passage 43 (blocking wall 44). Then, the restriction on the unlocked position of the open link 40 and the operating piece 35 is released, and both the open link 40 and the operating piece 35 are returned to the unlocked position by the elasticity of the anti-panic spring 36. Therefore, the latch device can be switched to the unlocked state without performing the unlocking operation on the inner lock button 32 or the like again.

  As described above, in the present invention, the operating piece 35 urged by the anti-panic spring 36 is fixed by the lock shaft 31 common to the lock lever 30. This eliminates the need for a dedicated member that pivots the operating piece 35. Further, since the lock lever 30 is switched between the lock position and the unlock position by rotating around the lock shaft 31, the place where the lock lever 30 overlaps with the lock lever 30 is a place suitable for the installation of the rotating member, Therefore, it is extremely reasonable to place the operating piece 35 on the lock shaft 31 and to arrange the operating piece and the lock lever 30 together.

DESCRIPTION OF SYMBOLS 10 ... Latch assembly, 11 ... Striker, 12 ... Latch, 13 ... Ratchet, 14 ... Latch body, 15 ... Recessed part, 16 ... Latch shaft, 17 ... Ratchet shaft, 18 ... Latch spring, 19 ... Ratchet spring, 20 ... U-shaped groove 21 ... 1st step, 22 ... 2nd step, 23 ... Opening, 24 ... Ratchet pin, 25 ... Cover plate, 26 ... Back plate, 26A ... Parallel plate, 26B ... Bending plate, 27 ... Open lever, 28 ... Outside Opening handle, 29 ... Inner door handle, 30 ... Lock lever, 31 ... Lock shaft, 32 ... Inner lock button, 33 ... Door key cylinder, 34 ... Over center spring, 35 ... Operating piece, 36 ... Anti-panic spring, 37 ... convex part, 38 ... convex part, 39 ... pin part, 40 ... open link, 41 ... guide slot, 42 ... Contact surface, 43 ... passage, 44 ... closing wall.

Claims (4)

  An open lever 27 that is displaced by an opening operation of the door opening handle 28 on the door, a lock lever 30 that rotates around a lock shaft 31 to switch between an unlock position U and a lock position L, and the lock lever 30 includes When in the unlocked position U, the displacement of the open lever 27 is switched to an engaging position where the displacement of the open lever 27 can be transmitted to the ratchet 13. When in the locked position L, the displacement of the open lever 27 is switched to a non-engaged position where the displacement of the open lever 27 is not transmitted to the ratchet 13. The open link 40 is connected to the lock lever 30 so as to be interlocked by the elasticity of the anti-panic spring 36, and the open link 40 is switched between the lock position L and the unlock position U of the lock lever 30. And the open lever 27 is displaced by the opening operation. When the lock lever 30 is switched from the lock position L to the unlock position U in the state, the anti-panic spring 36 is elastically displaced, so that the operating piece 35 and the open link 40 are not switched and the lock lever 30 is not switched. 30 is switched to the unlocked position U, the operating piece 35 is arranged so as to rotate about the lock shaft 31, and the open link 40 is brought into contact with the ratchet 13 side to open the opening. A contact surface 42 capable of transmitting the displacement of the lever 27 to the ratchet 13 and a wall 44 capable of restricting switching of the open link 40 to the unlock position by contact with the ratchet 13 side are provided. It is formed so as to extend from the side surface of the open link 40 in the axial direction of the lock shaft 31, When the opening operation of the open lever 27 is returned, the wall 44 is released from contact with the ratchet 13 and the restriction on switching the open link 40 and the operating piece 35 to the unlock position U is released. Accordingly, the open link 40 and the operating piece 35 are both switched to the unlock position U by the elasticity of the anti-panic spring 36.   The vehicle door latch device according to claim 1, wherein the contact surface is an end surface of the wall 44.   3. The operating piece 35 according to claim 1, wherein the operating piece 35 is provided with a pin portion 39 that protrudes toward the lock lever 30 and engages with the open link 40, and the open link 40 and the operating piece are interposed via the pin portion 39. 35 is a vehicle door latch device.   4. The operation piece 35 is arranged on one side in the axial direction of the lock shaft 31 from the lock lever 30, and the open link 40 is moved from the lock lever 30 to the lock shaft. The vehicle door latch apparatus arrange | positioned in the other side in the axial center direction of 31.

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