JP5082539B2 - Lock structure for vehicle door - Google Patents

Description

  The present invention relates to a vehicle door lock structure.

  In general, a vehicle such as an automobile is provided with an outside handle on the door, and the door can be opened by pulling the outside handle.

  Further, a latch mechanism having a latch and a ratchet is provided inside the door, and the door is closed when the latch of the latch mechanism is locked by the striker on the vehicle body side. The latch is held by the ratchet and the striker so that the door is kept closed with respect to the vehicle body.

Here, a key cylinder and a connecting rod connected to the key cylinder are disposed in the vicinity of the outside handle. By inserting a key into the keyway and performing a key operation, the key cylinder and the connecting rod rotate. When the connecting rod is rotated, the lock device is operated to release the engagement state of the ratchet with the latch (for example, see Patent Document 1).
JP 2005-282095 A

  However, in the above-described prior art, when a malicious person inserts a tool such as a screwdriver into the key cylinder illegally and a load of a predetermined value or more is input along the axial direction of the key cylinder, the operation input means Is configured to move away from the main case of the housing. In this case, there is a possibility that the lock can be unlocked by rotating the driven lever through the insertion hole of the connecting rod using the tool.

  Therefore, the present invention provides a vehicle door lock structure that can secure the anti-theft property of a vehicle even when a tool such as a screwdriver is inserted into a key cylinder to unlock the door illegally. is there.

  The vehicle door lock structure according to the present invention has a connecting rod that rotates via a key cylinder by a key operation, and an accommodating recess that accommodates an engaging portion formed at the tip of the connecting rod, A locking device having a rotating member that is locked by the engaging portion and rotates, and provided with a fragile portion that breaks the connecting rod when a load of a predetermined value or more is input to the connecting rod, The main feature is that an engaging holding portion for holding the engaging portion of the connecting rod is provided on the rotating member or a peripheral portion thereof.

  According to the vehicle door locking structure according to the present invention, even if a tool such as a screwdriver is inserted into the key cylinder to illegally unlock the door, the connecting rod breaks from the fragile portion to the rotating member. Since the engagement portion is held by the provided engagement holding portion, the rotation member of the lock device cannot be rotated. Therefore, the anti-theft property of the vehicle can be ensured even for a tool that unjustly unlocks the door by inserting a tool such as a screwdriver into the key cylinder.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First embodiment]
First, a first embodiment of the present invention will be described.

  FIG. 1 is a schematic view showing a lock structure for a vehicle door in the first embodiment of the present invention.

  A door outer panel 1 is disposed on the outer side in the vehicle width direction along the vertical direction and the vehicle front-rear direction. An outer handle 3 can be opened and closed in the vehicle width direction at the upper end of the door outer panel 1. It is attached.

  A casing 9 including a main case 5 and a sub case 7 is provided between the door outer panel 1 and a door inner panel (not shown). The casing 9 is provided with a latch mechanism accommodating portion 13 and a lock mechanism accommodating portion 21.

  The latch mechanism 11 is accommodated in the latch mechanism accommodating portion 13. The latch mechanism 11 can be locked to a striker 15 provided on the vehicle body side, and includes a latch 17 and a ratchet 19. The latch 17 and the ratchet 19 are rotatable about the rotation shafts 17 a and 19 a, respectively, and are configured such that the notch 17 b of the latch 17 is engaged with the striker 15. The ratchet 19 can be engaged with the latch 17.

  The lock mechanism accommodating portion 21 is provided with an open lever 23 and a lock mechanism (not shown). The open lever 23 is provided with a rotation shaft 23a at the center, an end on the outer side in the vehicle width direction is formed on the action end 23b, and an end on the inner side in the vehicle width is formed on the operating end 23c. .

  The outside handle 3 is connected to a working end 23b of the open lever 23 via a connecting member 25 extending downward. By operating the outside handle 3, a load is applied to the open lever 23 via the connecting member 25, and the open lever 23 rotates about the rotation shaft 23a.

  On the other hand, a key cylinder 27 and a connecting rod 29 are disposed inside the outside handle 3 in the vehicle width direction, that is, between the door outer panel 1 and the door inner panel.

  The key cylinder 27 is connected to a connecting rod 29. When the key cylinder 27 is rotated, the connecting rod 29 is also rotated integrally.

  FIG. 2 is an enlarged cross-sectional view of the door lock device of FIG.

  The connecting rod 29 is integrally formed from a main body portion 31 extending from the key cylinder 27 and an engaging portion 33 provided at the front end of the main body portion 31 in the vehicle width direction. Of the engaging portion 33, a weak portion 35 having a diameter smaller than that of the main body 31 is formed at a boundary portion with the main body 31. In addition, the main-body part 31 and the axial part 39 are formed in the substantially same diameter. A disk-shaped flange 37 is formed on the inner side in the vehicle width direction of the fragile portion 35. The flange 37 extends radially outward from the outer periphery of the shaft portion 39 of the engaging portion 33 and is disposed so as to cover the outer side in the vehicle width direction of the rotating member 41 constituting the locking device. A plurality of ribs 43 extending radially outward are provided at a distal end of the shaft portion 39 of the engaging portion 33 at a predetermined interval in the circumferential direction.

  In addition, a substantially cylindrical protective part 45 projects outwardly in the vehicle width direction at the upper end of the main case 5, and an accommodation hole 47 is formed inside the protective part 45. A rotating member 41 that is a part of the locking device is rotatably held in the receiving hole 47. The rotating member 41 is formed in a substantially bottomed cylindrical shape, and a support hole 51 is formed inside the bottom portion 49 in the vehicle width direction. The support hole 51 is fitted to a support shaft 53 provided on the sub case 7 side, and the rotating member 41 is rotatably held around the support shaft 53. Further, a cylindrical portion 55 is extended from the bottom portion 49 of the rotating member 41 toward the outer side in the vehicle width direction, and a folded portion (engagement) that bends obliquely toward the inner side in the radial direction at the tip of the cylindrical portion 55. A holding portion 57 is formed. The folded portion 57 is formed over the entire circumference of the cylindrical portion 55 and is formed to be elastically deformable. Here, the engagement holding portion holds the engagement portion 33 when the connecting rod 29 is broken. In the present embodiment, the folded portion 57 that can be elastically deformed is shown as the engagement holding portion, but the present invention is not limited to this. Note that a locking piece 59 protrudes radially inward on the inner peripheral side of the cylindrical portion 55. A plurality of the locking pieces 59 are provided along the circumferential direction of the cylindrical portion 55, and are configured to be able to be locked to a rib 43 formed on the engaging portion 33 of the connecting rod 29. An accommodation recess 63 is formed inside the rotation member 41, and the engagement portion 33 of the connecting rod 29 is accommodated in the accommodation recess 63.

  An operation procedure of the door lock device having the above-described configuration will be briefly described.

  First, as shown in FIG. 1, when the outside handle 3 is pulled outward in the vehicle width direction, the open lever 23 rotates about the rotation shaft 23 a via the connecting member 25 connected to the outside handle 3. The ratchet 19 also rotates about the rotation shaft 19a. Since the ratchet 19 is engaged with the latch 17, the latch 17 also rotates as the ratchet 19 rotates, and the notch 17 b of the latch 17 is detached from the striker 15. As a result, the door can be opened.

  Next, when the door is closed, the notch 17 b of the latch 17 is engaged with the striker 15. In this state, when a key is inserted into a key groove provided near the outside handle 3 and rotated, the key cylinder 27 and the connecting rod 29 are rotated. Since the engaging portion 33 at the tip of the connecting rod 29 is provided with a rib 43, the rib 43 engages with a locking piece 59 formed on the rotating member 41 of the locking device, and the rotating member 41 is engaged. If it rotates, even if the outside handle 3 is operated, the latch 17 does not rotate and the door does not open.

  Here, in the state shown in FIG. 2, when a malicious person inserts a tool such as a screwdriver into the key cylinder 27 through the key groove to rotate the key cylinder 27, the connecting rod is shown in FIG. A load F greater than a predetermined value is input to 29. Then, since the connecting rod 29 breaks starting from the fragile portion 35, the rotation driving force is not transmitted to the rotation member 41 of the lock device, and the rotation member 41 does not rotate. Therefore, the engagement between the latch 17 and the ratchet 19 cannot be released, and the anti-theft property of the vehicle can be ensured.

  Below, the effect by embodiment of this invention is demonstrated.

  (1) In the present embodiment, the connecting rod 29 is provided with a fragile portion 35 that breaks the connecting rod 29 when a load of a predetermined value or more is input, and the rotating member 41 is provided with the connecting rod 29. The folding | returning part 57 holding the engaging part 33 of this is provided.

  Therefore, even if a tool such as a screwdriver is inserted into the key cylinder 27 to attempt to unlock the door illegally, the connecting rod 29 breaks starting from the fragile portion 35, and thus the rotating member 41 of the locking device is rotated. I can't. Accordingly, the anti-theft property of the vehicle can be ensured even for a tool that unjustly unlocks the door by inserting a tool such as a screwdriver into the key cylinder 27.

  Further, since the turn-back portion 57 is formed on the rotation member 41 of the lock device, the turn-back portion 57 can reliably hold the engagement portion 33 of the broken connecting rod 29. Therefore, even after the connecting rod 29 is broken, the engaging portion 33 prevents the tool from entering, so that the unlocking of the lock using the tool can be prevented.

(2) A flange 37 that extends in the radial direction and covers the rotating member is formed closer to the engaging portion 33 side than the fragile portion 35 in the connecting rod 29. Therefore, even if it is going to make a tool penetrate | invade into a locking device, since the penetration | invasion of a tool is blocked | prevented by the said flange 37, the lock | rock unauthorized release can be blocked | prevented reliably.

[Second Embodiment]
The second embodiment of the present invention will be described below. However, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant descriptions are omitted.

  FIG. 4 is an enlarged cross-sectional view of a main part of the door lock device according to the present embodiment.

  As shown in FIG. 4, the rotation member 41 of the locking device is held in a rotatable state in an accommodation hole 47 formed in the upper end portion of the main case 5.

  In the present embodiment, an insertion hole 61 that penetrates the upper end portions of the sub case 7 and the main case 5 and the radial center portion of the bottom portion 49 of the rotating member 41 in the vehicle width direction is formed. The diameter of the insertion hole 61 is set to a size that allows a tool, a wire, or the like to be inserted, for example.

  Below, the effect by 2nd Embodiment of this invention is demonstrated.

  In the present embodiment, a casing 9 that holds the rotating member 41 in a rotatable manner is provided, and an insertion hole that penetrates the casing 9 and the rotating member 41 and reaches the engaging portion 33 of the connecting rod 29. 61 is formed.

  Therefore, when a malicious person inserts a tool into the key cylinder 27 and breaks the connecting rod 29, and then removes the engaging portion 33 of the broken connecting rod 29 at a maintenance shop or the like, the wire or the like is inserted into the insertion hole 61. By inserting a tool or the like, the broken engaging portion 33 of the connecting rod 29 can be easily removed.

  By the way, the vehicle body structure according to the present invention has been described by taking the first and second embodiments as examples. However, the present invention is not limited to these embodiments, and various other embodiments are adopted without departing from the gist of the present invention. can do.

It is the schematic which shows the lock structure of the door for vehicles in 1st Embodiment of this invention. It is sectional drawing to which the door lock apparatus of FIG. 1 was expanded. It is sectional drawing which shows a door lock apparatus when a load is input into the connecting rod. It is sectional drawing to which the principal part of the door lock apparatus in 2nd Embodiment of this invention was expanded.

Explanation of symbols

DESCRIPTION OF SYMBOLS 9 ... Casing 27 ... Key cylinder 29 ... Connecting rod 33 ... Engagement part 35 ... Fragile part 37 ... Flange 41 ... Turning member 57 ... Folding part (engagement holding part)
61 ... insertion hole 63 ... receiving recess

Claims (4)

A connecting rod that rotates via a key cylinder by a key operation;
A locking device having a receiving recess for receiving an engaging portion formed at the tip of the connecting rod and having a rotating member that is locked by the engaging portion and rotates;
The connecting rod is provided with a weakened portion that breaks the connecting rod when a load of a predetermined value or more is input, and the holding member holds the engaging portion of the connecting rod at the rotating member or the peripheral portion thereof. A structure for locking a vehicle door, characterized in that a portion is provided.   2. The vehicle door lock structure according to claim 1, wherein the engagement holding portion is a folded portion capable of elastic deformation, which holds the engagement portion of the connecting rod. 3.   The casing further includes a casing that rotatably holds the rotating member, and an insertion hole that penetrates the casing and the rotating member to reach the engaging portion of the connecting rod is formed. Or the lock structure of the door for vehicles of 2. The connecting rod includes a main body portion extending from the key cylinder, the engaging portion formed at the tip of the main body portion, and the fragile portion formed between the main body portion and the engaging portion. is configured, the said engagement portion than weak portion, a vehicle according to any one of claims 1 to 3, characterized in that the formation of the flange to cover the rotary member extends in the radial direction Door lock structure.

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