JP5994151B2 - Counterweight mounting structure for door lock device - Google Patents

Description

  The present invention relates to a counterweight mounting structure for a door lock device that locks the opening and closing of a door of a vehicle.

  The door lock device that locks the opening and closing of the door of the vehicle can be locked and unlocked by operating the key cylinder from the outside of the vehicle, and can also be locked and unlocked by operating the inner lock knob of the door from the inside of the vehicle. It is configured to be able to.

  By the way, when a collision accident occurs while the vehicle is running, for example, a heavy object such as a connecting rod that connects the inner lock knob and the door lock mechanism moves due to inertial force, and the door lock device in the unlocked state unexpectedly. There is a possibility of switching to the locked state. If the door lock device unexpectedly switches from the unlocked state to the locked state when a collision accident occurs in this way, if the passenger in the vehicle cannot move, the inner lock knob cannot be operated from the inside of the vehicle. Since a third party cannot unlock the door lock device, there is a problem that it takes time to rescue the occupant.

  Therefore, in order to prevent the door lock device from switching from the unlocked state to the locked state due to inertial force due to a collision or the like, a counterweight for canceling the inertial force of the connecting rod due to the collision is provided on the lock lever to which the connecting rod is connected. It is performed on the opposite side of the connecting point of the connecting rod with the rotation axis of the lock lever as the center (see, for example, Patent Document 1).

JP 58-011275 A

  However, conventionally, since the counterweight is attached to the lock lever by welding or the like, there is a problem that the attachment is complicated.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a counterweight mounting structure for a door lock device that allows a counterweight to be easily mounted with one touch without rattling.

In order to achieve the above object, the invention according to claim 1 is a structure for attaching a counterweight to a rotary lever that switches between a locked state and an unlocked state of a door lock device that locks the opening and closing of a door of a vehicle.
A bottomed cylindrical main body that can store the counterweight is formed on the rotary lever,
Forming a plurality of elastically engaging elastic claws that engage with the rear end edge of the counterweight on the side of the main body,
Provided on the bottom of the main body is one first contact piece that elastically contacts the front end surface of the counterweight and biases the counterweight in the anti-insertion direction ;
The first abutting piece is formed so as to be elastically deformable in the insertion direction of the counterweight by being separated from the bottom surface of the main body portion leaving a connecting portion, and at a position corresponding to the axis of the counterweight. A first contact portion that contacts the counterweight is provided .

According to a second aspect of the present invention, in the first aspect of the invention, a plurality of second contact pieces that elastically engage with the outer peripheral surface of the counterweight are formed on the side of the main body. And

According to a third aspect of the present invention, in the second aspect of the invention, each of the second contact pieces protrudes from the bottom portion toward the counter-insertion direction of the counterweight in the main body portion, and the diameter of the main body portion. Elastically deformable in the direction,
On the inner surface, there is a permissible portion that is located on the radially outer side of the counterweight inserted into the main body portion and allows the counterweight to be inserted into the main body portion, and the radial direction of the main body portion from the permissible portion And a second contact portion that bulges inward in the radial direction of the main body through an inclined surface that is inclined inward.

  According to the first aspect of the present invention, when the counterweight is inserted into the main body of the rotating lever through the opening, the plurality of elastic engagement claws engage with the rear end edge of the counterweight, and the main body of the counterweight This prevents the counterweight from falling off, so the counterweight can be easily attached to the rotary lever with a single touch. The counterweight housed in the main body of the rotating lever is biased in the anti-insertion direction by the first abutting piece formed on the bottom of the main body, so that the rear end edge of the counterweight is elastically engaged. There is no gap between them when pressed against the pawl, and the play of the counterweight in the insertion direction in the main body is prevented.

Further, according to the first aspect of the invention, since the formation of the first contact portion at a position corresponding to the axis of the counterweight of the first contact piece, without bias the counterweight by one first contact piece The rear end edge can be pressed against each elastic engagement claw by urging the side opposite to the insertion side, and rattling in the insertion direction of the counterweight can be reliably prevented with a simple structure.

According to the second aspect of the present invention, the plurality of second contact pieces formed on the side portion of the main body portion of the rotary lever are elastically engaged with the outer peripheral surface of the counterweight in the stored state. The radial backlash is prevented.

According to the third aspect of the present invention, on the inner surface of each second abutting piece formed on the side portion of the main body portion of the rotary lever, an allowance portion that allows insertion of the counterweight into the main body portion, and the main body portion Since the second contact portion bulging inward in the radial direction is formed, the counterweight can be easily inserted and attached to the main body, and the second contact is made on the outer peripheral surface of the counterweight accommodated in the main body. By the contact of the second contact portion of the piece, the radial play of the counterweight can be reliably prevented with a simple configuration.

It is a figure which shows the unlocked state of the door lock apparatus provided with the counterweight attachment structure which concerns on this invention. It is a figure which shows the locked state of the door lock apparatus provided with the counterweight attachment structure which concerns on this invention. It is a perspective view of the lock lever to which the counterweight was attached. It is the sectional view on the AA line of FIG. 3 which shows the attachment state of a counterweight. It is a perspective view of the lock lever which shows the state before attaching a counterweight. It is a perspective view which fractures | ruptures and shows the main-body part of a lock lever.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a view showing an unlocked state of a door lock device provided with a counterweight mounting structure according to the present invention, and FIG. 2 is a view showing a locked state of the door lock device.

  A door lock device 1 shown in FIGS. 1 and 2 is a device that locks the opening and closing of a door (not shown) of a vehicle, and a rotation lever that switches between a lock state and an unlock state of a lock mechanism (not shown) provided on the door. The lock lever 2 is provided. An inner panel (not shown) of the door is provided with an inner lock knob 3 for operation from the inside of the vehicle. The inner lock knob 3 is connected to one end of the lock lever 2 by a metal connecting rod 4. Yes.

  In the present embodiment, the lock lever 2 is integrally formed in a Y shape with resin, and its central portion is pivotally supported by a shaft 5 on a base member (not shown) of the door lock device 1. . An operation arm portion 2 </ b> A extends integrally from the portion of the lock lever 2 that is pivotally supported by the shaft 5. The operation arm portion 2A is connected to a lock mechanism (not shown), and performs the function of switching between the lock state and the unlock state of the lock mechanism by rotating together with the lock lever 2 around the shaft 5. is there. Although not shown, the door lock device 1 is provided with a latch that locks the door with respect to the vehicle body by being engaged with and disengaged from the striker on the vehicle body side. The door lock device 1 is configured such that an operation of a door handle (not shown) provided on the door is transmitted to a latch via a lock mechanism. When the lock mechanism is in an unlocked state, the door lock device 1 is not shown. When the latch is activated by the operation of the door handle to open the door and the lock mechanism is in the locked state, the operation force of the door handle (not shown) is interrupted by the lock mechanism and is not transmitted to the latch. The door cannot be opened.

  By the way, the connecting rod 4 is connected to one end of the lock lever 2 (the upper end in FIGS. 1 and 2), but on the side opposite to the connecting point of the connecting rod 4 around the shaft 5 of the lock lever 2 (see FIG. 1 and the lower side of FIG. 2 is integrally formed with a bottomed cylindrical main body 2B, and the main body 2B has a counterweight 6 formed into a disk shape with metal according to the present invention. It is attached by the mounting structure.

  Thus, as shown in FIG. 1, when the inner lock knob 3 is in the unlock position, the lock lever 2 and the operation arm portion 2A formed integrally therewith are in the illustrated position, and the lock mechanism (not shown) is Since the door handle (not shown) and the latch are connected by the lock mechanism in the unlocked state, the occupant can freely open and close the door.

  Next, when the occupant slides the inner lock knob 3 from the unlocked position to the locked position as shown in FIG. 2 from the unlocked state shown in FIG. 1, the connecting rod 4 is pulled in the direction of the arrow in FIG. Since the lock lever 2 and the operation arm portion 2A formed integrally therewith rotate in the direction of the arrow shown in the figure (counterclockwise) about the shaft 5, the lock mechanism (not shown) switches from the unlocked state to the locked state. Since the door handle and the latch (not shown) are disconnected from each other by the lock mechanism, the occupant cannot open the door even if the door handle is operated, and the door opening / closing is locked.

  When the occupant slides the inner lock knob 3 at the lock position shown in FIG. 2 from the lock position to the unlock position as shown in FIG. 1, the connecting rod 4 is pushed in the direction of the arrow in FIG. And the operation arm portion 2A formed integrally therewith rotates around the shaft 5 in the direction indicated by the arrow (clockwise) in the figure, so that the lock mechanism (not shown) is switched from the locked state to the unlocked state. Since the door handle (not shown) and the latch are connected, the door can be opened and closed.

  As described above, a lock mechanism (not shown) can be switched between a locked state and an unlocked state by operating the inner lock knob 3 from the passenger's compartment, but similar switching can also be performed by operating the key cylinder from the outside of the vehicle. It can be carried out.

  By the way, for example, when a collision accident (frontal collision) occurs when the vehicle is running with the lock mechanism in the unlocked state shown in FIG. 1, the inertial force in front of the vehicle is applied to the connecting rod 4 which is a heavy object. F1 acts, and the inertial force F1 tries to rotate the lock lever 2 and the operation arm portion 2A formed integrally therewith in the counterclockwise direction (lock direction) in FIG. When the lock lever 2 and the operation arm 2A formed on the lock lever 2 are rotated to the lock position shown in FIG. 2 by the inertial force F1 at the time of the collision of the vehicle, the lock mechanism is switched from the unlocked state to the locked state. Since the opening / closing of the door is locked, the inner lock knob 3 cannot be operated when the occupant cannot move in the vehicle, so a third party cannot immediately unlock the door from the outside of the vehicle, and the occupant is rescued. The problem that it takes time and effort occurs.

  However, in the door lock device 1 according to the present embodiment, the counterweight 6 is attached to the opposite side of the connecting point of the connecting rod 4 with the shaft 5 of the lock lever 2 as the center. An inertial force F2 in front of the vehicle acts on the weight 6. Since the inertial force F2 acts to rotate the lock lever 2 in the unlocking direction, the inertial force F1 and the inertial force F2 cancel each other, and the lock mechanism 2 is unlocked by rotating the lock lever 2 in the locking direction. Since the switching from the state to the locked state is prevented and the door can be freely opened and closed, the above problem does not occur.

  Next, the structure for attaching the counterweight 6 to the lock lever 2 according to the present invention will be described below with reference to FIGS.

  3 is a perspective view of the lock lever to which the counterweight is attached, FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3 showing the state of attachment of the counterweight, and FIG. 5 is a view of the lock lever showing the state before the counterweight is attached. FIG. 6 is a perspective view showing the lock lever in a cutaway manner.

  A shaft through hole 7 through which the shaft 5 passes is formed at the center of the lock lever 2, and a door handle side transmission (not shown) interlocked with the door handle of the lock mechanism is provided at the tip of the operation arm 2A. A long hole 8 is formed for connecting a connecting pin that connects or disconnects the lever and a latch-side transmission lever (not shown) that interlocks with the latch. A circular hole 9 for connecting one end of the connecting rod 4 (see FIGS. 1 and 2) is formed at one end of the lock lever 2, and the shaft through hole 7 of the lock lever 2 is centered. At the end opposite to the circular hole 9, the bottomed cylindrical main body 2 </ b> B for accommodating the counterweight 6 is integrally formed.

  Then, on the cylindrical side portion (circumferential wall) 2a of the main body portion 2B of the lock lever 2, there are alternately three elastic engagement claws 10 and three second contact pieces 11 that stand integrally vertically from the bottom portion 2b. In addition, they are formed at an equiangular pitch (60 ° pitch) in the circumferential direction.

  Each of the elastic engagement claws 10 can be elastically deformed in the radial direction of the main body 2B with the base end as the center, and the distal end (the upper end in the figure) is behind the counterweight 6 inserted into the main body 2B. A claw portion 10a that engages with an end edge (upper end edge in the figure) is integrally formed. Further, each of the second contact pieces 11 is formed to be lower than the elastic engagement pawl 10, and as shown in FIGS. 4 and 6, the counter weight inserted into the main body 2 </ b> B is formed on the inner surface thereof. 6 through an allowance portion 11a that allows the counterweight 6 to be inserted into the main body portion 2B, and an inclined surface that inclines from the allowance portion 11b toward the inside in the radial direction of the main body portion 2B. A second contact portion 11b bulging inward in the radial direction of the main body portion 2B is formed.

  Further, in the center of the bottom 2b of the main body 2B of the lock lever 2, the counter weight is elastically brought into contact with the front end surface (lower end surface in the figure) of the counterweight 6 inserted into the main body 2B from its opening. A first abutting piece 12 that urges 6 in the anti-insertion direction (upward in the figure) is formed. As shown in FIG. 6, the first abutment piece 12 is separated from the bottom surface 2b of the main body 2B while leaving the connecting portion 2c formed on the bottom 2b of the main body 2B, thereby inserting the counterweight 6 in the insertion direction. A first abutting portion 12 a (see FIG. 4) that abuts against the counterweight 6 is provided at a position that is elastically deformable and corresponds to the axis of the counterweight 6.

  Thus, when the counterweight 6 is inserted into the main body portion 2B of the lock lever 2 from the opening, the claw portions 10a of the three elastic engagement claws 10 are engaged with the rear end edges of the counterweight 6, The counterweight 6 is prevented from falling off from the main body 2B, and the counterweight 6 can be easily attached to the lock lever 2 with one touch. The counterweight 6 accommodated in the main body 2B of the lock lever 2 is attached in the anti-insertion direction (upward in the drawing) by the first contact piece 12 formed on the bottom 2b of the main body 2B of the lock lever 2. Therefore, the rear end edge of the counterweight 6 is not pressed against the claw portion 10a of each elastic engagement claw 10, and no gap is generated between the two, and the insertion direction of the counterweight 6 in the main body 2B is prevented. Backlash in the (up and down direction in the figure) is prevented.

  In particular, in the present embodiment, in the first contact piece 12 formed in the main body 2B of the lock lever 2, the first contact portion 12a is formed at a position corresponding to the axis of the counterweight 6. Therefore, the counterweight 6 can be urged toward the non-insertion side (upward in the figure) by one first abutting piece 12a without bias, and the rear end edge can be pressed against the claw portion 10a of each elastic engagement claw 10. The play of the counterweight 6 in the insertion direction can be reliably prevented with a simple structure.

  Further, in the present embodiment, the three second contact pieces 11 formed on the side portion 2a of the main body portion 2B of the lock lever 2 are elastically engaged with the outer peripheral surface of the counterweight 6 in the stored state. Therefore, backlash in the radial direction within the main body 2B of the counterweight 6 is also prevented. Particularly in the present embodiment, an allowance portion 11a that allows insertion of the counterweight 6 into the main body portion 2B is provided on the inner surface of each second contact piece 11 formed on the side portion 2a of the main body portion 2B of the lock lever 2. Since the second contact portion 11b bulging inward in the radial direction of the main body portion 2B is formed, the counterweight 6 can be easily inserted and attached to the main body portion 2B of the lock lever 2 and attached to the main body portion 2B. The second abutting portion 11b of the second abutting piece 11 abuts against the outer peripheral surface of the accommodated counterweight 6 to reliably prevent rattling of the counterweight 6 in the main body portion 2B in the radial direction with a simple configuration. be able to.

  In the embodiment described above, the elastic engagement claws 10 and the second contact pieces 11 are formed on the main body 2B of the lock lever 2 three by three. The number of the contact pieces 11 is arbitrary as long as it is plural.

  Further, in the above embodiment, the lock lever 2 directly connected to the connecting rod 4 connected to the inner lock knob 3 is configured as a rotating lever. The counterweight can be mounted on any rotary lever that switches between the locked and unlocked states of the lock mechanism, and the mounting structure of the present invention can be employed.

1 Door lock device 2 Lock lever (rotary lever)
2A Lock lever operation arm 2B Lock lever body 2a Body side 2b Body bottom 2c Body connection 3 Inner lock knob 4 Connecting rod 5 Axis 6 Counterweight 7 Lock lever shaft through hole 8 Lock Long hole of the lever 9 Circular hole of the lock lever 10 Elastic engagement claw 10a Claw part of the elastic engagement claw 11 Second contact piece 11a Allowable part of the second contact piece 11b Second contact part of the second contact piece 12 1st contact piece 12a 1st contact part of 1st contact piece F1, F2 Inertial force

Claims (3)

A counterweight mounting structure on a rotating lever that switches between a locked state and an unlocked state of a door lock device that locks opening and closing of a vehicle door,
A bottomed cylindrical main body that can store the counterweight is formed on the rotary lever,
Forming a plurality of elastically engaging elastic claws that engage with the rear end edge of the counterweight on the side of the main body,
Provided on the bottom of the main body is one first contact piece that elastically contacts the front end surface of the counterweight and biases the counterweight in the anti-insertion direction ;
The first abutting piece is formed so as to be elastically deformable in the insertion direction of the counterweight by being separated from the bottom surface of the main body portion leaving a connecting portion, and at a position corresponding to the axis of the counterweight. A counterweight mounting structure for a door lock device, comprising a first contact portion that contacts the counterweight.   The counterweight mounting structure for a door lock device according to claim 1, wherein a plurality of second contact pieces that elastically engage with an outer peripheral surface of the counterweight are formed on a side portion of the main body. Each of the second contact pieces protrudes from the bottom of the main body part toward the counter-insertion direction of the counterweight, and is elastically deformable in the radial direction of the main body part,
On the inner surface, there is a permissible portion that is located on the radially outer side of the counterweight inserted into the main body portion and allows the counterweight to be inserted into the main body portion, and the radial direction of the main body portion from the permissible portion The counterweight mounting structure for a door lock device according to claim 2, further comprising a second contact portion that bulges inward in the radial direction of the main body portion via an inclined surface that is inclined inward.

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