Classifications

• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B77/00—Vehicle locks characterised by special functions or purposes
  • E05B77/34—Protection against weather or dirt, e.g. against water ingress
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
  • E05B15/02—Striking-plates; Keepers; Bolt staples; Escutcheons
  • E05B15/0205—Striking-plates, keepers, staples
  • E05B15/029—Closures, e.g. preventing dirt or paint from entering into the striker
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B85/00—Details of vehicle locks not provided for in groups E05B77/00 - E05B83/00
  • E05B85/02—Lock casings

Definitions

• This invention relates to a latch for a motor vehicle. More particularly, this invention relates to a shutter mechanism for keeping foreign material out of the latch when the latch is exposed.
• a latch typically has a housing with a mouth which receives a striker and a ratchet and pawl mechanism that cooperates with the mouth to selectively retain the striker.
• the pawl is manipulated to release the ratchet and unlatch the striker.
• the closure panel such as a tail gate, liftgate, sliding door, and the like, is open, the latch is exposed allowing debris to enter the housing, which debris can cause the ratchet to malfunction.
• a latch assembly in which the mouth is selectively coverable in order to reduce the ingress of debris into the housing, and to shield an operator from contact with the inner mechanisms of the latch.
• a latch assembly having a housing with a mouth for receiving a striker.
• the latch assembly has a shutter mounted to the housing which is movable between a cover configuration for covering the mouth and an open configuration allowing the striker to enter the mouth.
• the shutter may have a shutter biasing mechanism operably connected to the shutter and the housing for urging the shutter toward the closed configuration.
• the shutter may have first and second shutter elements moveable away from each other in moving from the cover to the open configuration.
• the first and second shutter elements may include cam surfaces which are acted upon by the striker to move the shutter toward the open configuration as the striker enters the mouth.
• the shutter biasing mechanism may have at least one shutter spring connected to the first and second shutter elements for urging the first and second shutter elements toward each other.
• the shutter biasing mechanism may include a shutter guide acting between the housing and the first and second shutter elements for guiding movement of the first and second shutter elements relative to the housing.
• the shutter biasing mechanism may further include a shutter spring connected to the first and second shutter elements.
• the shutter guide may include cooperating slots and pins in the first and second shutter elements and housing for guiding the first and second shutter elements for sliding movement relative to the housing.
• the latch assembly may include a ratchet mounted to the housing for movement between a latched position and an unlatched position.
• the latch assembly may further include a pawl mounted to the housing for movement between an engaged position holding the ratchet in the latched position to prevent withdrawal of the striker, and a disengaged position allowing movement of the ratchet toward the disengaged position to allow withdrawal of the striker from the mouth.
• a release lever may also be connected to the pawl for moving the pawl toward the disengaged position.
• a ratchet spring may be mounted between the ratchet and the housing to bias the ratchet toward the disengaged position.
• a pawl spring may further be mounted between the pawl and the housing for urging the pawl toward its engaged configuration.
• Figure 1 is a perspective view illustrating a latch assembly according to the present invention from its outboard side
• Figure 2 is a perspective view from the inboard side of the latch assembly of Figure
• Figure 3 is a front elevation of a latch assembly of Figure 1;
• Figure 4 is an end elevation of the front of the latch assembly of Figure 1;
• Figure 5 is an end elevation of the rear of the latch assembly of Figure 1;
• Figure 6a is a front elevation corresponding to Figure 3, but illustrating a striker adjacent a mouth of the latch assembly;
• Figure 6b is a view corresponding to Figure 6a, but showing the striker entering the mouth;
• Figure 6c is a view corresponding to Figures 6a and 6b, but sowing the striker in the mouth;
• Figure 7 is a top plan view of the latch assembly of Figure 1 ; and, Figure 8 is a bottom plan view of the latch assembly of Figure 1.
• a latch assembly illustrative of the present invention is generally indicated by reference 10 in the accompanying drawings.
• the latch assembly 10 has a housing 12 with a mouth 14 for receiving a striker 16 which is illustrated in Figures 6a through 6c.
• a ratchet 18 is mounted to the housing 12 for movement between a latched position showing in Figure 6c and an unlatched position shown in the remaining Figures. In the latched position, the ratchet 18 cooperates with the housing 12 to trap the striker 16 in the mouth 14. In the unlatched position, the striker is removable from the mouth 14.
• a ratchet spring 20 in Figure 8 may be provided to act between the ratchet 18 and housing 12 to bias the ratchet toward its unlatched position.
• a pawl 30 is mounted to the housing 12 for movement between an engaged position and a disengaged position. In the engaged position, the pawl 30 engages the ratchet 18 to hold it in its latched position to prevent withdrawal of the striker 16 from the mouth 14.
• the pawl In the disengaged position, the pawl allows movement of the ratchet 18 toward its unlatched position to allow withdrawal of the striker 16 from the mouth 14.
• a pawl spring 32 in Figure 7 may be provided to act between the pawl 30 and the housing 12 to urge the pawl 30 toward its engaged position.
• a release lever 40 is operably connected to the pawl 30 for moving the pawl 30 toward its disengaged position.
• a shutter according to the present invention is generally indicated by reference 50.
• the shutter 50 may include a first shutter element 52 and a second shutter element 54 movable between a cover configuration covering the mouth 14 as illustrated in Figures 1, 2, 3, 4, 5, 6a and 6b and an open configuration illustrated in Figure 6c. In the open configuration, the shutter 50 allows entry of the striker 16 into the mouth 14.
• the shutter 50 is mounted to the housing 12 in a manner which allows the first and second shutter elements, 52 and 54 respectively to move in opposite relative directions.
• a representative mounting arrangement is illustrated which includes slots 60 in the housing 12 which slidably receive pins 62 extending from the first and second shutter elements, 52 and 54 respectively.
• Other arrangements may also work such as providing slots in the first and second shutter elements, 52 and 54 respectively, and corresponding pins on the housing 12.
• the first and second shutter elements, 52 and 54 respectively may be pivotably mounted to the housing 12 for a clamshell type of movement.
• the first and second shutter elements, 52 and 54 respectively may be provided with respective cam surfaces 56 and 58.
• Suitable biasing means such as a shutter spring 70 may be provided to urge the shutter 50 toward its cover configuration.
• the shutter spring 70 acts between the first and second shutter elements, 52 and 54, respectively.
• the shutter spring 70 also acts between the shutter 50 and the housing 12 by virtue of the constraint placed on the movement of the pins 60 in the slots 62.
• Other biasing means may be apparent to those skilled in such devices, such as having a separate spring for each shutter element mounted directly between the respective shutter element and the housing 12.
• the shutter 50 moves into its cover configuration to at least partially close the mouth and shield the latch assembly 10 from the entry of debris into the mouth 14.

Landscapes

• Lock And Its Accessories (AREA)
• Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
• Load-Engaging Elements For Cranes (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=22455665

Family Applications (1)

Country Status (6)

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Family Cites Families (4)

• 2000
  • 2000-05-05 AT AT00924998T patent/ATE271636T1/de not_active IP Right Cessation
  • 2000-05-05 AU AU43879/00A patent/AU4387900A/en not_active Abandoned
  • 2000-05-05 DE DE60012348T patent/DE60012348T2/de not_active Expired - Lifetime
  • 2000-05-05 WO PCT/CA2000/000503 patent/WO2000068535A1/fr active IP Right Grant
  • 2000-05-05 EP EP00924998A patent/EP1220970B1/fr not_active Expired - Lifetime
  • 2000-05-05 CA CA002386620A patent/CA2386620C/fr not_active Expired - Fee Related

Non-Patent Citations (1)

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