JP2015224457A - Door latch device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door latch device for a vehicle, which can greatly improve antitheft performance against an attack from the outside.SOLUTION: A metal protector 31 having an upper joint between a casing 11 and a cover 12 and an upside protective barrier part 311 for protecting the whole top surface thereof by covering it is fixed in such a manner as to sandwich upper parts of the casing 11 and the cover 12.

Description

  The present invention relates to a vehicle door latch device with anti-theft measures.

  As a conventional vehicle door latch device, for example, as described in Patent Document 1, a body that accommodates a meshing mechanism including a latch that can be engaged with a striker on the vehicle body side and a ratchet that can be engaged with the latch; A casing fixed to the casing, an unlocked state in which the engagement state between the striker and the latch is released so that the door can be opened, and a locked state in which the door cannot be opened as it cannot be released. There are those provided with an operating mechanism that can be switched between and a cover that is attached to the casing so as to cover the operating mechanism.

  Further, in the door latch device described in Patent Document 1, a synthetic resin waterproof cover (waterproof cover) for preventing rainwater from entering the body and the casing is provided on the upper part of the casing and the cover. It is provided so as to be sandwiched. If such a waterproof cover is provided, the waterproof cover also has a function as a protective wall, so a special tool is inserted from the gap between the door outer panel and the door glass, and the casing and cover are deformed. There is little risk that the operating mechanism housed in the casing is moved in the unlocking direction with a tool to open the door.

Japanese Patent No. 5070649

However, just providing a waterproof cover as in the door latch device described in Patent Document 1 may cause the following problems.
That is, since the waterproof cover is made of synthetic resin and has low strength, the waterproof cover itself may be forcibly deformed or broken by a tool inserted into the door. If it becomes like this, the junction part of a casing and a cover may be pry open with a tool, the operation mechanism in a casing may be moved to an unlocking direction, and there exists a possibility that a door may be open | released.

  In recent years, thatchat (the Motor Insurance Repair Research Center) anti-theft performance standard has been established in the UK, and thatchat anti-theft performance standard has been applied to cars sold in the UK. The The Thatcham anti-theft performance standard is based on the fact that when a car is attacked by theft or the like, it can withstand intrusion into the car for 2 minutes or more. In the door latch device only having the above-mentioned synthetic resin waterproof cover, there is a possibility that the above-described problems may occur, so it is difficult to satisfy the Thatcham antitheft performance standard.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle door latch device that can greatly improve the anti-theft performance by an attack from the outside.

According to the present invention, the above problem is solved as follows.
According to a first aspect of the present invention, there is provided a body which is fixed to the inner surface of the door and engages with a striker on the vehicle body side to restrain the door in a closed position, and is attached to the body. A casing in which an operation mechanism that can be switched to an unlocked state in which the engagement state of the meshing mechanism with the striker can be released and a locked state in which the engagement state cannot be released is housed in a component housing part in which a facing surface opens. A cover that is fixed to the casing and closes an opening on the vehicle interior side of the component housing portion;
A metal protector having an upper joint between the casing and the cover and an upper protective wall that covers and protects the entire upper surface of the casing is fixed so as to sandwich the upper part between the casing and the cover. It is a feature.

  In a second aspect based on the first aspect, the protector further hangs down from the upper protective wall and covers at least an upper portion of the front surface of the casing and the cover that does not face the inner surface of the door. It is characterized by having a front protective wall portion for protection.

  According to a third aspect of the present invention, in the first or second aspect, the protector further continues to the upper protective wall portion, and is an upper surface of a key cylinder mounting portion formed at an upper portion of the component housing portion in the casing. It is characterized by having a key cylinder mounting portion protective wall portion that covers and protects.

  According to a fourth invention, in any one of the first to third inventions, the protector further hangs down from the upper protective wall portion and is provided on a vehicle outer side surface that does not face the inner surface of the door of the component housing portion. It has a vehicle outer side protection wall part which covers and protects at least the upper part.

  According to a fifth invention, in any one of the first to fourth inventions, the casing and the entire upper surface of the cover and a vertical surface near the upper surface are covered with a waterproof cover, and the entire waterproof cover is covered with the protector. It is characterized by that.

  According to the vehicle door latch device of the present invention, the upper joint portion between the casing and the cover and the entire upper surface thereof are covered and protected by the upper protective wall portion in the metal protector, so that the outer panel of the door and the door glass are protected. Even if a special tool is inserted through the gap between the two, it becomes difficult for the joint between the casing and the cover to be pry open by the tool, and for the upper part of the casing and the cover to be deformed or destroyed. As a result, the anti-theft performance of the door latch device due to an attack from the outside is improved, and the possibility that the operating mechanism housed in the casing is moved in the unlocking direction by a tool and the door is opened is extremely reduced. Further, by providing such a metal protector, it is possible to satisfy the Thatcham antitheft performance standard in the UK.

It is the front view which looked at the door latch device for vehicles concerning the present invention from the vehicles back. Similarly, it is the side view which looked at the door latch device from the car inside. It is a side view which abbreviate | omits a cover and shows the internal structure of an operation unit. It is the disassembled perspective view which looked at the state before the waterproof cover and protector to a casing and a cover from the vehicle exterior front. Similarly, it is a perspective view after attachment. It is the disassembled perspective view which looked at the state before the waterproof cover and protector to a casing and a cover from the vehicle interior front. Similarly, it is a perspective view after attachment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the rear side in FIG. 1 and the left side in FIG. 2 are referred to as “front”, the front side in FIG. 1 and the right side in FIG. 2 are referred to as “rear”, and the right side and FIG. The rear side of the drawing in FIG. 2 is referred to as “the vehicle outer side”, and the left side in FIG. 1 and the front side of the drawing in FIG.

  As shown in FIGS. 1 to 3, the door latch device 1 is attached to the inner side of the rear end of a front door D (hereinafter referred to as a door) of an automobile, and includes a meshing mechanism 2 for restraining the door D to a closed position. The meshing unit 3 has an operation unit 4 that is assembled to the meshing unit 3.

  The meshing unit 3 has a synthetic resin body 5 fixed to the inner surface D1 of the door D. The body 5 has a latch 7 that can be engaged with the striker 6 on the vehicle body side, and can be engaged with the latch 7. A meshing mechanism 2 comprising a ratchet 8 is accommodated. An open lever (not shown) that can rotate integrally with the ratchet 8 is pivotally supported on the front surface of the body 5. When the door D is closed, the striker 6 engages with the latch 7, and the ratchet 8 engages with the latch 7, thereby preventing the latch 7 from rotating in the opening direction (clockwise in FIG. 1). The door D is restrained in the closed position.

  The operation unit 4 includes a synthetic resin casing 11 having a substantially L shape in plan view attached to the front surface of the body 5 and a synthetic resin cover 12 that closes a vehicle interior opening surface of a later-described component housing portion 118 in the casing 11. And. In FIG. 3, the meshing unit 3 and the cover 12 are omitted to show the internal structure of the operation unit 4.

  The component accommodating portion 118 of the casing 11 is pivotally supported by a first motor 13 for locking / unlocking operation and a support shaft 111 that is integrally provided in the casing 11 and faces the inside / outside of the vehicle. The second motor 15 is pivotally supported by a worm wheel 14 that is rotated forward and backward by a driven worm 131, a second motor 15 for double lock operation, and a support shaft 112 that is provided in the casing 11 and faces inward and outward of the vehicle. Lock from the neutral position based on the block lever 16 rotated by a predetermined angle by the worm 151 driven by the lock, the lock provided on the outside of the door D, the lock by the key cylinder KC for unlocking operation, and the unlocking operation A first key that is rotatable in a direction (counterclockwise in FIG. 3) and an unlocking direction (clockwise in FIG. 3). The upper end of the bar 17 and the lower part of the first key lever 17 are connected, and in synchronization with the operation of the first key lever 17 in accordance with the operation of the key cylinder KC, the lock position (clockwise in FIG. 3) from the neutral position in FIG. And a second key lever 18 that rotates by a predetermined angle in the unlocking direction (counterclockwise in FIG. 3), and a support shaft 113 that is coaxial with the second key lever 18, and from the unlocking position shown in FIG. 3, which is pivotally supported by a linkage lever 19 that can be rotated clockwise), and a support shaft 114 that is integrally provided in the casing 11 and that faces the inside and outside of the casing 11 between the casing 11 and the cover 12. Based on the rotation of the worm wheel 14 driven by the LK and the first motor 13, a first rotatable in the locking direction (counterclockwise) from the unlock position shown in FIG. 3. The first lock lever 20 and the first lock lever 20 are pivotally supported by a support shaft 114 that is coaxial with the first lock lever 20, and the biasing force of the torsion coil spring 33 acting between the first lock lever 20 and the first lock lever 20 is integrally driven. In addition, in synchronization with the linkage lever 19, the second lock lever 21 is rotatable to the unlock position and the lock position (counterclockwise in FIG. 3) shown in FIG. 3 swings together with the second lock lever 21 from the unlock position shown in FIG. 3 to the lock direction (counterclockwise in FIG. 3) or vice versa, and when the second lock lever 21 is in the lock position, it moves upward from the lock position. When the second lock lever 21 is in the unlock position, the first moveable in the upward open direction from the unlock position The second lever 22 is provided coaxially with the first lift lever 22 and is movable in the unlocking position and the locking position (counterclockwise in FIG. 3) and the upward opening direction integrally with the first lift lever 22. From the standby position shown in FIG. 3 by the opening operation of the inside handle IH provided on the inner side of the door D, which is pivotally supported by the lift lever 23 and a support shaft 115 provided in the vehicle interior and exterior direction integrally provided in the casing 11. The first and second lifts are pivotally supported by an inside lever 24 that rotates by a predetermined angle in the open direction (clockwise) and a longitudinal support shaft 116 provided in the lower portion of the casing 11. The lower portions of the levers 22 and 23 are connected so as to be swingable in the front-rear direction, and the outside connecting portion 252 is connected to an outside handle provided outside the door D. And Idoreba 25 is provided.

  The first motor 13, the worm wheel 14, the linkage lever 19, the first and second lock levers 20, 21 and the like are unlocked so that the engagement state of the meshing mechanism 2 with the striker 6 can be released, and cannot be released. An operation mechanism 26 according to the present invention that can be switched to a locked state is configured. The locked state of the operating mechanism 26 is a state in which at least the linkage lever 19 and the second lock lever 21 are in the locked position, and the unlocked state of the operating mechanism 26 is the linkage lever 19, the first and second lock levers 20. , 21 are in the unlocked position.

  An operating force transmission member capable of transmitting the operating force of the connecting portion 201 of the first lock lever 20, the connecting portion 241 of the inside lever 24, and the inside handle IH forming the inside opening operation handle of the door D is provided at the lower portion of the casing 11. 27, a lid member 29 made of synthetic resin that conceals the end of the operation force transmission member 28 that can transmit the operation force of the lock knob LK that forms the vehicle inner side lock operation member of the door D is connected to be openable and closable. The lid member 29 is opened during the assembly of the parts to the casing 11 and is closed after the operating force transmission members 27 and 28 are coupled to the coupling portion 201 of the first lock lever 20 and the coupling portion 241 of the inside lever 24, respectively. Is done.

  As shown in detail in FIGS. 4 to 7, the upper part of the casing 11 and the cover 12 is provided with a synthetic resin waterproof cover 30 that prevents intrusion of rainwater or the like into the casing 11, and a stainless steel plate or rust prevention treatment. A metal protector 31 formed by subjecting a general steel plate or the like to sheet metal processing is mounted.

  The casing 11 exposes the vehicle inner side surface and rear surface of the body 5, and covers the front surface, upper and lower surfaces, and the vehicle outer side surface, and is parallel to the vehicle inner side surface of the body 5 and faces toward the vehicle inner side. And a component housing portion 118 opened. The component housing portion 118 is connected to the end portion of the body cover portion 117 on the vehicle inner side so as to form a substantially right angle, and the vertical dimension is longer than the body cover portion 117 in a side view. A substantially cylindrical key cylinder mounting portion 119 projecting outward from the vehicle is integrally connected to the uppermost portion of the component housing portion 118 directly above the upper wall 117a of the body cover portion 117.

  The waterproof cover 30 is attached to the upper part of the component housing part 118 and the cover 12 in the casing 11, and the upper cover part 301 that covers the entire upper surface of the component housing part 118 and the cover 12 and a vertical surface near the upper surface. The upper part 117 of the body cover 117 above the upper wall 117a, the rear cover part 302 covering the rear surface of the cover 12 and the vertical surface near the rear surface, and the upper part of the front part of the part container 118 and the cover 12 Front side covering part 303 that covers the vertical surface in the vicinity of the half and the front face, and a side face that is connected to the outer edge of upper side covering part 301 and front side covering part 303 and that obliquely covers the upper part of the outer side surface outside the vehicle in component housing part 118 A substantially triangular outer surface covering portion 304 is integrally formed.

  The waterproof cover 30 is formed by engaging engagement holes 305 and 305 provided at the front lower portion and the rear lower portion of the outer surface covering portion 304 with projections 118a and 118a provided on the side surface outside the vehicle of the component housing portion 118. By fixing the front surface side of the covering portion 301 to the cover 12 together with the protector 31 with a screw 32 which will be described later, the upper portion of the joint portion S between the casing 11 and the cover 12 is covered and the upper portion of the casing 11 and the cover 12 is sandwiched. Is fixed.

  The protector 31 is attached to the upper part of the casing 11 and the cover 12 so as to cover the upper cover portion 301, the front cover portion 303, and the outer surface cover portion 304 of the waterproof cover 30, respectively. The upper protective wall 311 that covers and protects the entire upper surface of the portion 118 and the cover 12 and the joint S of the upper portion of the casing 11 and the cover 12, and hangs down from the upper protective wall 311. A front protection wall portion 312 that covers and protects the upper half of the front surface that does not oppose the inner surface D1 of the door D, and an outer edge of the upper protection wall portion 311 and the front protection wall portion 312, A vehicle outer side protective wall portion 313 that covers and protects the upper portion of the outer side surface of the vehicle exterior in the component housing portion 118 that does not face the inner surface D1 is provided. Further, at the rear end portion of the upper protective wall portion 311, a key cylinder mounting portion protective wall portion 314 that covers and protects the upper surface of the key cylinder mounting portion 119 in the casing 11 is integrally formed in a bowl shape toward the outside of the vehicle. It is extended to.

  A vehicle outer side fixing portion 315 is integrally extended toward the outside of the vehicle at the rear end lower portion of the vehicle outer side protective wall portion 313 of the protector 31, and the front side protective wall portion 312 has an upper side edge on the vehicle inner side. The front vehicle inner side fixing portion 316 is integrally extended toward the rear. Further, an upper vehicle inner side fixing portion 317 is integrally extended downward on a side edge of the upper protective wall portion 311 on the vehicle inner side.

  As shown in FIGS. 5 and 7, the protector 31 engages an engagement hole 316 a provided at the distal end portion of the vehicle inner side fixing portion 316 with a protrusion 121 provided at the front upper portion of the side surface on the vehicle inner side of the cover 12. At the same time, the upper end portion of the vehicle outer side fixing portion 315 is fixed to the upper portion of the front side of the body covering portion 117 of the casing 11 on the outer side of the vehicle with screws 32, and the upper vehicle inner side fixing portion 317 is further fixed to the inner side of the cover 12. The casing 11 and the cover are fixed to the upper end portion of the side surface with screws 32 so as to cover almost all except the rear cover portion 302 of the waterproof cover 30 and sandwich the upper portion of the waterproof cover 30. 12 is fixed to the upper part. After the protector 31 is fixed, the upper portion including the joint portion S of the casing 11 and the cover 12 is covered and protected by the protector 31, and the upper surface of the key cylinder mounting portion 119 in the casing 11 is protected by the key cylinder mounting portion. The protective wall 314 is covered and protected. When the upper vehicle inner side fixing portion 317 is fixed with the screw 32, the front side of the upper cover portion 301 of the waterproof cover 30 is also fixed to the upper end portion of the cover 12.

  As described above, in the door latch device of the above embodiment, the upper surface and the front surface including the joint portion S between the casing 11 and the cover 12, the upper portion of the outer side surface of the component housing portion 118 in the casing 11, and the key cylinder mounting portion 119. Since the upper surface is covered and protected by the metal protector 31, the anti-theft performance of the door latch device is significantly improved. That is, since the metal protector 31 serves as a protective wall against an external attack on the door latch device, a special tool is inserted through the gap between the outer panel of the door D and the door glass, or the outer panel of the door D. Even if a part of the outer panel is opened and a special tool is inserted from the opening by destroying and pulling out the key cylinder and the outside handle provided on the casing, the joint S between the casing 11 and the cover 12 is not removed. It is difficult to pry it open and to deform or destroy the upper parts of the casing 11 and the cover 12, the key cylinder mounting part 119, and the upper part of the part accommodating part 118. As a result, the possibility that the operating mechanism 26 accommodated in the casing 11 is moved in the unlocking direction by the tool and the door D is opened is extremely small, and the Satcham antitheft performance standard in the UK can be cleared. It becomes possible.

  The metal protector 31 is attached so as to cover the waterproof cover 30 made of synthetic resin that covers the casing 11 and the upper part of the cover 12. The upper part of the casing 11 and the cover 12 is connected to the waterproof cover 30 and the protector. Since it is covered with a double protective wall 31, the anti-theft performance of the door latch device is further improved.

  Although the embodiment of the present invention has been described above, the following various modifications and changes can be made to the present embodiment without departing from the gist of the present invention.

(I) The waterproof cover 30 is omitted, and only the protector 31 is used.
(Ii) The vehicle outer side protection wall portion 313 of the protector 31 is extended to the vicinity of the lower end portion of the component housing portion 118 to cover and protect the vehicle outer side surface of the component housing portion 118 over a wide range.
(Iii) The upper vehicle inner side fixing portion 317 of the protector 31 is extended to the vicinity of the lower end portion along the shape of the vehicle inner side surface of the cover 12, and the upper vehicle inner side fixing portion 317 is used as an inner side protective wall portion. Protect the vehicle's inner side by covering it extensively.

DESCRIPTION OF SYMBOLS 1 Door latch apparatus 2 Engagement mechanism 3 Engagement unit 4 Operation unit 5 Body 6 Striker 7 Latch 8 Ratchet 11 Casing 12 Cover 13 1st motor (operation mechanism)
14 Worm wheel (operating mechanism)
15 Second motor 16 Block lever 17 First key lever 18 Second key lever 19 Linking lever (operating mechanism)
20 First lock lever (operating mechanism)
21 Second lock lever (operating mechanism)
22 first lift lever 23 second lift lever 24 inside lever 25 outside lever 26 operation mechanism 27, 28 operation force transmission member 29 lid member 30 waterproof cover 31 protector 32 screw 33 torsion coil spring 111-116 support shaft 117 body cover 117a Upper wall 118 Component housing portion 118a Protruding portion 119 Key cylinder mounting portion 121 Protruding portion 131, 151 Worm 201 Connecting portion 241 Connecting portion 251 Operating end portion 252 Outer vehicle connecting portion 301 Upper covering portion 302 Rear covering portion 303 Front covering portion 304 Outer side surface covering portion 305 Engaging hole 311 Upper protective wall portion 312 Front protective wall portion 313 Car outer protective wall portion 314 Key cylinder mounting portion protective wall portion 315 Vehicle outer fixing portion 316 Front vehicle inner fixing portion 316a Engaging hole 317 Upper portion Car interior fixed part D Door D1 Inner surface IH Inside handle KC Key cylinder LK Lock knob S Joint

Claims (5)

A body containing a meshing mechanism that is fixed to the inner surface of the door and engages a striker on the vehicle body side to restrain the door in a closed position;
It is possible to switch between an unlocked state in which the engagement state of the meshing mechanism with the striker can be released and a locked state in which it cannot be released in a component housing portion that is attached to the body and has a surface facing the vehicle interior. A casing containing the operating mechanism;
A cover that is fixed to the casing and closes an opening on the vehicle interior side of the component housing portion;
A metal protector having an upper joint between the casing and the cover and an upper protective wall that covers and protects the entire upper surface of the casing is fixed so as to sandwich the upper part between the casing and the cover. A vehicle door latch device.   The protector further includes a front protective wall portion that hangs down from the upper protective wall portion and covers and protects at least an upper portion of the front surface of the casing and the cover that does not oppose the inner surface of the door. The vehicle door latch device according to claim 1.   The protector further includes a key cylinder mounting portion protective wall portion that is continuous with the upper protective wall portion and covers and protects an upper surface of the key cylinder mounting portion formed on the upper part of the component housing portion in the casing. The vehicle door latch device according to claim 1 or 2.   The protector further includes a vehicle outer protective wall portion that hangs down from the upper protective wall portion and covers and protects at least an upper portion of the vehicle outer side surface that does not oppose the inner surface of the door of the component housing portion. The vehicle door latch device according to any one of claims 1 to 3.   5. The vehicle according to claim 1, wherein the casing and the entire upper surface of the cover and a vertical surface near the upper surface are covered with a waterproof cover, and the entire waterproof cover is covered with the protector. Door latch device.

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