JPH0720297Y2 - Vehicle door latch device - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention (1) Field of Industrial Use The present invention is capable of rotating due to contact between a striker provided on the vehicle body side and the striker associated with the door closing operation on the door side. And a detent lever engageable with the claw for maintaining the engagement state of the striker with the engagement recess, and BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle door latch device including an operating lever that is interlocked with and connected to a detent lever to actuate the detent lever in a direction to release the combined state.

(2) Conventional Technology Conventionally, such a device is known from, for example, Japanese Utility Model Publication No. 61-98166.

(3) Problems to be Solved by the Invention In the above-mentioned conventional technology, the elastic film provided on the claw produces the striking sound of the striker and the claw, the sliding sound of the detent lever and the claw, and the rotating sound of the claw when the door is closed. It is possible to prevent the generation of abnormal noise when the door is closed. By the way, at the time of door opening operation, the claw rotates in the direction to disengage the striker from the engagement recess by the spring force.At that time, if the striker disengages from the engagement recess at a high speed, abnormal noise may occur. is there. In order to prevent the generation of such abnormal noise, in the closed state, the striker is strongly held by the elastic film provided in the engagement recess to suppress the speed of the striker's disengagement from the engagement recess during the door opening operation. Is simply conceivable. However, when the opening and closing operation of the door is repeated many times, the elastic coating wears and creates a gap between the striker and the engaging concave portion in the closed state, and it also causes the striker to be disengaged from the engaging concave portion during the door opening operation. It becomes difficult to suppress the speed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle door latch device that can prevent abnormal noise from being generated when a door is opened, and that is easy to manufacture and has good durability. To do.

B. Configuration of the Invention (1) Means for Solving the Problems In order to achieve the above-mentioned object, the present invention is provided with a buffer portion made of an elastic material at least in a portion slidingly contacting a striker and provided in an engaging recess. The part is integrally provided with an elastic tongue piece that is bent and deformed so that a side surface of the striker is brought into sliding contact with the striker when the striker is engaged with the engagement recess.

(2) Operation According to the above configuration, the elastic tongue of the cushioning portion is bent and deformed so that the side surface of the cushioning portion slidably contacts the striker when the striker is engaged with and disengaged from the engagement recess when the door is opened and closed. Since it is pressed elastically, the speed at which the striker disengages from the engagement recess is suppressed when the door is opened, which is effective in preventing abnormal noise, and there is rattling between the striker and the engagement recess when the door is closed. Can be effectively suppressed.

Further, since the elastic tongue has a structure in which the side surface comes into contact with the striker due to its bending deformation, even if the tip of the tongue wears due to repeated opening and closing of the door, the tongue itself gradually rises in response to the wear. The elastic tongue can be surely brought into sliding contact with the striker due to the bending deformation of the tongue itself even if the elastic tongue is not formed with a particularly high dimensional accuracy.

(3) Embodiment Hereinafter, one embodiment of the present invention will be described with reference to the drawings. First, in FIG. 1, an opening / closing opening 2 is provided on a side surface of a vehicle body 1 of a vehicle V, and the opening / closing opening 2 is provided. The door 3 is supported by the vehicle body 1 to open and close the vehicle. Moreover, in order to maintain the closed state of the door 3, a door latch device 4 according to the present invention is provided between the vehicle body 1 and the door 3.

Referring to FIGS. 2 and 3 together, the door latch device 4 includes a substantially U-shaped striker 5 fixed to an opening edge of the opening 2 in the vehicle body 1 and the striker 5 when the door 3 is closed. And a holding mechanism 6 disposed on the door 3 side to hold the. Further, the holding mechanism 6 allows the board 7 fixed to the door 3, the claw 8 rotatably supported by the board 7 so as to be engaged with the striker 5, and the board 8 to be engaged with the claw 8. The detent lever 9 is supported by 7 and the operating lever 10 is connected and linked to the detent lever 9 so as to actuate the detent lever 9 in the direction of releasing the engagement with the claw 8.

The substrate 7 is made of synthetic resin, and a cover plate (not shown) is bonded to one surface of the substrate 7. Further, the substrate 7 is provided with a groove 12 which is opened at a side edge so as to form an insertion hole 11 for inserting the striker 5 when the door 3 is closed, in cooperation with the cover plate. Thus, the substrate 7 and the cover plate are fixed in the door 3 so that the insertion hole 11 faces the free end side portion of the door 3.

Referring also to FIG. 4, the claw 8 is basically made of metal and has a disk shape. The claw 8 is arranged between the base plate 7 and the cover plate, and is supported by the base plate 7 so that the claw 8 can be rotated within a limited range by a support shaft 14 inserted into a hole 13 formed in a central portion. To be done. On the outer periphery of the claw 8, an engaging recess 15 for engaging the striker 5 and a claw 16 for engaging the detent lever 9 are provided. As shown in FIG. 2, the claw 8 is pressed by the receiving position with the engaging recess 15 facing the insertion hole 11 and the striker 5 inserted from the insertion hole 11 in response to the closing operation of the door 3. As shown in FIG. 3, the striker 5 is rotatable with respect to the engagement holding position where the striker 5 is engaged with the engagement recess 15. Moreover, the claw 8 is rotationally biased toward the receiving position by a spring (not shown) interposed between the claw 8 and the substrate 7.

Further, a synthetic resin contact member body 17 is provided on the base plate 7 so as to contact the tip of the striker 5 at the time of inserting the striker 5 through the insertion hole 11 so as to reduce the moving speed of the striker 5. The contact member 17 is supported so as to be movable within a limited range along the moving direction, and the corresponding contact member 17 is elastically urged by the spring 18 toward the direction in which it comes into contact with the striker 5. Further, an elastic body 19 that can contact the striker 5 when the striker 5 is fully inserted is fixed to the substrate 7.

As shown in FIG. 3, the detent lever 9 is attached to the base plate 7 via a shaft 20 parallel to the support shaft 14 at a position where the claw 8 can be engaged with the claw portion 16 in the engagement holding position. It is rotatably supported. Moreover, the detent lever 9 is urged to rotate in the direction in which the detent lever 9 is engaged with the claw portion 16 by the spring 21 contracted between the detent lever 9 and the substrate 7. Further, an elastic body 22 that can contact the detent lever 9 when the detent lever 9 rotates in a direction in which the detent lever 9 is engaged with the claw portion 16 is fixed to the substrate 7.

The operation lever 10 is an axis parallel to the axis 20 on the back side of the substrate 7.
It is rotatably supported by 26. One end of the operation lever 10 is interlocked with and linked to the detent lever 9, and the other end is interlocked with a lever 23 that can be moved up and down by a manual operation.
Be connected. Then, when the lever 23 is pulled up with the detent lever 9 engaged with the claw portion 16 of the claw 8, the detent lever 9 resists the spring force and releases the engaged state with the claw portion 16. It can be rotated. Moreover, although not shown, a lock mechanism for preventing the detent lever 9 from rotating in the engagement releasing direction with the claw portion 16 regardless of the operation of the lever 23 is provided on the back side of the substrate 7.

By the way, as shown in FIG. 4, the claw 8 is provided with a buffer portion 24 made of an elastic material such as a synthetic resin. The cushioning portion 24 is formed by covering the main portion of the claw 8 with a synthetic resin, and includes a portion of the engaging recess 15 that can abut the striker 5 and a claw portion 16 on one side of the claw 8. A buffer portion 24 is provided in the portion.

In FIG. 5, an elastic tongue piece 25 is integrally provided on a portion of the cushioning portion 24 corresponding to the engaging concave portion 15 at a portion corresponding to a joint surface with the claw 8 made of metal, for example. This ridge 25
May be formed by leaving the burrs generated when the claw 8 is covered with a synthetic resin to form the cushioning portion 24, and when the striker 5 is engaged with the engagement recess 15, the fifth portion is formed.
As shown by the chain line in the figure, it is bent and deformed, and the side surface 25s is disposed so as to be in sliding contact with the striker 5.

Next, the operation of this embodiment will be described. When the door 3 is closed from the state in which the door 3 is opened (the state shown in the second illustration), the striker 5 is inserted into the insertion hole 11 and the engagement recess 15 in the claw 8 is formed. Is pressed by the striker 5, the claw 8 is rotated as shown in FIG. 3, the striker 5 is engaged with the engaging recess 15, and the detent lever 9 is engaged.
Engages with the claw portion 16 of the claw 8 to maintain the engaged and retained state of the claw 8.

In this engaged and held state, the elastic tongue piece 25 of the buffer portion 24 in the engaging concave portion 15 is bent and deformed in the striker 5 while the side surface 25s thereof is being deformed.
And the striker 5 is engaged with the engaging recess 15
The engagement state with is strongly maintained.

When the detent lever 9 is rotated in a direction to release the engagement with the claw portion 16 by operating the lever 23 to release the engagement holding state, the claw 8 is rotated toward the receiving position side by the spring force, and the striker is moved. 5 is an insertion hole pressed by the claw 8.
Extruded from 11. At this time, the striker 5 and the elastic tongue piece 25
The side surface 25s of the tongue piece 25 is in relatively strong sliding contact with the elastic action of the tongue piece 25, and a relatively large frictional force is generated. Generation of abnormal noise during operation is prevented. In particular, in a new vehicle state in which the elastic force of the waterproof rubber around the periphery of the door 3 is large, it exerts a great effect in preventing abnormal noise.

According to an experiment by the applicant, compared with the conventional structure which produces an abnormal noise when the door is opened as shown by the broken line in FIG. 6, the one according to the present invention is shown by the solid line in FIG. In addition, it has been confirmed that it is effective in suppressing the generation of abnormal noise in the high frequency range, and the door opening operation noise has a high-class feeling.

By the way, when the opening and closing operation of the door 3 is repeated, the striker 5
The tip of the elastic tongue piece 25 in the engagement recess 15 is worn by the sliding contact with. However, until the entire height of the elastic tongue piece 25 is worn out, the elastic tongue piece 25 gradually rises according to the wear of the tip and elastically contacts the striker 5 for a relatively long period of time. Emergent contact can be maintained. Therefore, not only is it possible to suppress the generation of abnormal noise during the opening operation of the door for a long period of time, but also to hold the striker 3 in the engagement recess 15 while preventing the rattling even when the door 3 is closed. You can

C. Effect of the Invention As described above, according to the present invention, at least the portion that abuts the striker, the engaging recess is provided with the buffer portion made of the elastic material, and the buffer portion is provided with the striker to the engaging recess. Since the elastic tongue that bends and deforms so that the side surface comes into sliding contact with the striker at the time of engagement is integrally projected, the elastic tongue of the cushioning part is The striker can be elastically pressed by bending and deforming its side surface so that it comes into sliding contact with the striker, and this suppresses the speed at which the striker disengages from the engagement recess during door opening operation, and noise is generated. It can be effectively prevented, and rattling between the striker and the engagement recess in the door closed state can be effectively suppressed.

Further, since the elastic tongue has a structure in which the side surface comes into contact with the striker due to its bending deformation, even if the tip of the tongue wears due to repeated opening and closing of the door, the tongue itself gradually rises in response to the wear. Therefore, the striker can be accurately slidably contacted with the striker, and thus the above-described effects of suppressing abnormal noise can be effectively exhibited for a long period of time. Moreover, the elastic tongue can be surely slidably contacted to the striker by bending deformation of the tongue itself without forming the elastic tongue with a particularly high dimensional accuracy. It can also be formed by leaving the "burr" generated at that time as it is, and thus can greatly contribute to cost reduction and mass productivity improvement.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a perspective view showing a side surface of a vehicle in a door open state, and FIG. 2 is a vertical sectional side view showing a main part of a door latch device in a door open state. FIG. 3 is a vertical sectional side view showing a main part of the door latch device in a door closed state, FIG. 4 is an enlarged perspective view of a claw, and FIG.
FIG. 6 is an enlarged cross-sectional view taken along line VV in the figure, and FIG. 6 is a graph showing the experimental results. 1 ... Body, 3 ... Door, 4 ... Door latch device, 5 ...
… Strike, 7 …… Substrate, 8 …… Claw, 9 …… Detent lever, 10 …… Operating lever, 15 …… Engaging recess, 24
…… Cushioning part, 25 …… Elastic tongue, 25s …… Side, V …… Vehicle

Claims (1)

[Scope of utility model registration request] 1. A striker (5) provided on the vehicle body (1) side is provided on the door (3) side so that the striker (5) can rotate due to contact with the striker (5) when the door (3) is closed. And a claw (8) having an engagement recess (15) capable of engaging with the striker (5) and a claw (5) for maintaining the engagement state of the striker (5) with the engagement recess (15). 8) A detent lever (9) engageable with 8) and an operation linked to and linked to the detent lever (9) to actuate the detent lever (9) in a direction to release the engagement state with the claw (8). In a vehicle door latch device including a lever (10), a cushioning portion (24) made of an elastic material is provided in the engagement recess (15) at least at a portion slidingly contacting the striker (5), and the cushioning portion (24). The striker to the engaging recess (15) ( Vehicle door latch system in which the striker (5) on the sides (25s) bent so as to sliding contact with deforming resilient tongue (25) is characterized in that it is integrally projecting upon engagement).