JPS6242107B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a secondary lock device among automotive hood lock devices.

Generally, an automobile hood lock device has two lock mechanisms, a primary lock mechanism and a secondary lock mechanism. For example, when the primary lock mechanism is unlocked, it is biased by a return spring or the like. The hook portion of the latch body of the secondary lock mechanism engages with a latch formed on the hood inner panel, and the latch body and the latch are manually disengaged to open the hood. . However, in such a secondary lock mechanism, the latch body is rotationally fixed while being biased in the direction of engagement with the latch by a return spring on the vehicle body side.
If rust develops on the pivot shaft of the latch body or the return spring breaks, the latch body will become unable to rotate, and the hook part will not engage with the latching part when the hood is opened, and the primary mechanism will not operate completely. If this was not done, the hood could open inadvertently while driving, potentially blocking the forward view, which was dangerous. For this reason, various techniques have been proposed in the past for transmitting the collision force when closing the hood to the latch body and forcibly rotating the latch body to a position where the hook part formed on the latch body can engage with the hook part. ing. For example, the idea in Japanese Utility Model Publication No. 53-35382 is that a receiving piece is formed on the hooking part of the secondary lock, and when the hood is closed on the latch body, it collides with the receiving piece and locks the hook part of the latch body. The structure is such that an abutment piece is formed for forcibly rotating it to a position where it can engage with the part. However, as is clear from the above invention, in the conventional forced rotation mechanism of the latch body, the forced rotation of the latch body is performed via an additional member such as a receiving piece or an abutment piece, so the number of parts is increased. However, there is a disadvantage that the cost increases due to the increase in assembly man-hours. This invention aligns the hood inner panel with a manual operation part that is formed at one end of the secondary latch body and is essential for opening the secondary lock, and when the hood is closed, the hook part formed at the other end of the latch body is brought into contact with the hood inner panel. However, it is an object of the present invention to provide a secondary locking device for a hood that is advantageous in terms of cost and is reliable, by forcibly rotating the latch body to a position where it can engage with a latch portion formed on the hood inner panel. It is said that

The present invention will be specifically described below based on embodiments shown in the drawings. FIG. 1 and FIG. 2 are diagrams showing an embodiment of the present invention, and in the diagram, 1
2 shows a hood locking device consisting of a primary locking mechanism and a secondary locking mechanism, 2 is a base plate of the locking device fixed to the upper part of a single radiator core support (not shown) with bolts, and the base plate 2 has an approximately V shape. A secondary latch body 3 having a letter-shaped shape is supported by a shaft 51, and a manual operating portion 4 is formed at one end of the secondary latch body 3, and a hook portion 5 is formed at the other end. 6a is an engagement hole provided in the hood inner panel 7 and into which the hook portion 5 is loosely fitted;
A hook portion 6 that engages with the hook portion 5 is formed at the edge of this engagement hole. A locking lever 8 is pivotally supported on the base plate 2, and one end thereof is covered with the outer casing 201 and connected to an inner cable 20 that is connected to a hood opener (not shown). This secures the primary latch 10 in a locked state.

A primary latch striker 9 is fixed to the hood inner panel 7 and engages with the primary latch 10. Further, 11 is a primary latch return spring for holding the primary latch 10 in a position where it can be engaged with the primary latch striker 9 when the primary lock is released, and 12 is also a spring that constantly urges the secondary latch main body 3 in the direction of the latching portion 6. It is a secondary latch return spring for. The 51 pivot points on the base plate 2 of this secondary latch body 3 and the pivot points 5
Manual operation part 4 and catch part 5 with one point as the center point
As shown in FIG. 1, when the secondary latch return spring 12 is operating normally, the manual operation part 4 of the secondary latch body 3 is opened as shown by the dashed line in FIG. , is set to be held at a constant distance l from the hood inner panel 7, and in this case, the hook portion 5 can be engaged with the hook portion 6 with a meshing allowance b.

However, if the return spring 12 is broken as described above and the secondary latch main body 3 cannot be returned to the normal state as described above, the hood inner panel 7 and the manual operation part 4 may be damaged when the hood is closed. When the manual operation part 4 is pushed down by the hood inner panel 7 and the hood is fully closed as the hood is closed, the hook part 5 engages with the latch part 6. It is set to be held in an engageable position with a distance a. Further, if the hood causes a slight overstroke at this time, the above-mentioned meshing allowance becomes even larger.

To open the hood, which is held in the engageable state in this way, first release the primary lock mechanism, and then push up the manual operation part 7 of the secondary lock mechanism to open the hood, as shown in FIG. What is necessary is to release the engagement between the part 5 and the hook part 6.

Incidentally, a stopper for regulating the rotation range of the secondary latch main body 3 may be provided on the base plate 2 either by being embossed on the base plate 2, or by adding a separate member.

Since the present invention has the above-described configuration and function, the structure is simple and inexpensive, and the secondary lock mechanism can be operated reliably without requiring any members having special functions or additional members.

[Brief explanation of the drawing]

1 and 2 are explanatory views of the operation of the secondary lock device according to the present invention. 2...Base plate, 3...Latch body, 4
...Manual operation section, 5...Hook section, 6...Latching section, 7...Hood inner panel.

Claims (1)

[Claims] 1 A hook provided on the hood inner panel,
In a secondary locking device for a hood, which consists of a latch body that is pivotally supported on the vehicle body side and has a cooperating hook part and a manual operation part, when the hood is closed, the hood inner panel abuts against the manual operation part and locks the latch. The latch body is configured such that the latch body is forcibly rotated when the latch is operated, and is held at a position where the hook part and the latching part engage with each other when the hood is fully closed. A secondary locking device for the hood.