JP2005042401A - Latch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a latch device for eliminating waste of a material, while securing strength, by restraining a weight increase. <P>SOLUTION: A latch 2 and a detent lever 3 are arranged between an inside plate 5 and an outside plate 6 for constituting a base 1. The latch 2 and the detent lever 3 are rotatably installed on the base 1, by penetrating through the outside plate 6, the latch 2, and the inside plate 5 by a first rotary shaft 7, and penetrating through the outside plate 6, the detent lever 3, and the inside plate 5 by a second rotary shaft 8. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a latch device used to fix an automobile hood or the like in a closed state.

A closed body such as a hood of an automobile is fixed to the vehicle body in a closed state by a lock device including a striker fixed to one of the closed body and the vehicle body, and a latch device installed on the other.
Usually, a latch device includes a base fixed to a vehicle body or a closing body, and a latch and a detent lever that are rotatably attached to the base, and the latch rotates by an impact when the striker collides, and the groove The striker is squeezed and drawn, and the reverse rotation of the latch is regulated by a detent lever provided in the latch device so that the striker does not escape (see Patent Document 1).

In such a latch device, a strong pulling force is applied to the latch by an impact when the automobile collides, and a pulling force is also applied to the detent lever through the latch. The closure body opens. Therefore, the base to which the latch and the detent lever are attached is a base formed by molding a thick metal plate having a strength sufficient to withstand the external force described above.
For this reason, the entire latch device becomes very heavy, and there is a disadvantage that the material cost and processing are increased, and the cost is high.

JP-A-12-27511

  The problem to be solved by the present invention is that the base supporting the latch and the detent lever increases the weight and wastes the material if it is intended to secure the strength to withstand a large stress.

  In order to achieve the above object, the latch device of the present invention is provided with a base, a latch that is pivotally attached to the base by a first pivot shaft, and is engaged with and disengaged from a striker along with the pivot. A detent lever that is pivotally attached to the base by a second pivot shaft, engages / disengages with the latch as the pivot rotates, and regulates the pivot of the latch when engaged; A plate and an outer plate, the latch and the detent lever are disposed between the inner plate and the outer plate, the first rotation shaft passes through the outer plate, the latch and the inner plate, The second rotating shaft passes through the outer plate, the detent lever, and the inner plate.

  At the attachment points of the latch and the detent lever, through holes are formed in the inner plate and the outer plate, respectively, and cylindrical portions projecting in opposite directions along the periphery of the through hole are formed. A through hole corresponding to the through hole is formed, and the first rotating shaft and the second rotating shaft are inserted into the through hole and the through hole, respectively, and both ends thereof are crimped to form a head. Also good.

According to the first aspect of the present invention, since the latch and the detent lever are sandwiched and supported by the outer plate and the inner plate, sufficient strength can be obtained even if the outer plate and the inner plate are thinned, and it is large. The inner plate and the outer plate can be overlapped in the parts that require proof stress, and one part can be lost in the parts that do not require so much strength, so the overall weight can be reduced and the waste of materials can be saved. Cost can be reduced.
According to the second aspect of the present invention, the cylindrical portion is formed to increase the strength of the portion where the through hole is formed, and even if the inner plate and the outer plate are thin, they can withstand the impact caused by caulking. The tip is caught on the head to prevent the first rotation shaft and the second rotation shaft from coming off.

1 to 3 show a latch device used to fix an automobile hood to a vehicle body. The latch device includes a base 1 fixed to a hood, a latch 2, a detent lever 3, and a safety lever 4 that are rotatably attached to the base 1.
The base 1 is formed by stacking an inner plate 5 and an outer plate 6 made of metal. The inner plate 5 and the outer plate 6 are each formed in a substantially box shape in which three sides of a substantially square front plate 51, 61 are bent in the inner surface direction and side walls 52, 62 are provided on three side surfaces. The height of the side wall 52 of the inner plate 5 is lower than the height of the side wall 62 of the outer plate 6, and the latch 2 and the detent lever 3 are interposed between the front plate 51 of the inner plate 5 and the front plate 61 of the outer plate 6. A gap that is slightly wider than the thickness is formed.

Fixing pieces 53 and 63 projecting sideways are formed at the tips of the side walls 52 and 62 of the inner plate 5 and the outer plate 6 so as to overlap each other, and the base 1 is used as a hood through these fixing pieces 53 and 63. It is designed to be fixed.
Further, striker entrances 510 and 610 for receiving the striker 10 (FIG. 1) fixed to the opening of the vehicle body are formed at the edges of the front plates 51 and 61 where the side walls 52 and 62 are not provided.

Between the front plate 51 of the inner plate 5 and the front plate 61 of the outer plate 6, the latch 2 and the detent lever 3 are disposed on both sides of the striker entrances 510 and 610, respectively.
As shown in FIG. 1 and FIG. 3, oval reinforcing ribs 511 and 611 are formed so as to bulge toward the opposing surface side at the portions where the latch 2 of the inner plate 5 and the outer plate 6 is attached. Through holes 512 and 612 are formed at corresponding positions of the reinforcing rib 611, respectively. Further, along the peripheral edges of the through holes 512 and 612, cylindrical portions 513 and 613 that protrude in opposite directions are formed by burring.
Then, the first rotating shaft 7 is inserted into the through holes 512 and 612 of the inner plate 5 and the outer plate 6 and the through hole 20 formed in the latch 2, and both ends of the first rotating shaft 7 are crimped. A head portion 70 is formed to be caught at the tips of the cylindrical portions 513 and 613, and the latch 2 is rotatably attached to the base 1 by the first rotation shaft 7.

In the portions where the detent lever 3 of the inner plate 5 and the outer plate 6 is attached, oval reinforcing ribs 514 and 614 are formed so as to bulge to the opposite surface side, respectively, and the reinforcing ribs 514 and 614 are respectively located at corresponding positions. Through holes 515 and 615 are formed. Further, along the peripheral edges of the through holes 515 and 615, cylindrical portions 516 and 616 that protrude in opposite directions are formed by burring.
Then, the second rotating shaft 8 is inserted into the through holes 515 and 615 of the inner plate 5 and the outer plate 6 and the through hole 30 formed in the detent lever 3, and both ends of the second rotating shaft 8 are caulked. A head 80 is formed to be hooked at the tips of the cylindrical portions 516 and 616, and the detent lever 3 is rotatably attached to the base 1 by the second rotating shaft 8.

As shown in FIG. 1, a notch 21 that engages with the striker 10 is formed on the outer peripheral portion of the latch 2, and the notch 21 is disposed facing the striker advance openings 510 and 610. When the striker 10 enters the striker entrances 510 and 610 and collides with the latch 2, the latch 2 is rotated by the impact, and the striker 10 engaged with the notch 21 is drawn.
Then, the detent lever is engaged with the latch 2 engaged with the striker 10 to restrict the reverse rotation of the latch 2.

The safety lever 4 is disposed on the outer surface of the outer plate 6 and is rotatably attached to the base 1 by a third rotating shaft 9 penetrating the outer plate 6 and the safety lever 4. Further, the slide protrusion 40 formed on the safety lever 4 engages with an arc-shaped hole 617 formed on the outer plate 6, and the rotation range of the safety lever 4 is restricted by the arc-shaped hole 617.
A hook portion 41 bent at an acute angle is formed at one end of the safety lever 4, and the hook portion 41 is opened to the striker entrances 510 and 610 by a spring 42 installed between the base 1 and the safety lever 4. It is energized to close up.

When the hood is closed and the striker 10 collides with the hook portion 41 of the safety lever 4, the safety lever 4 is pushed away by the angle of the hook portion 41 and rotates against the force of the spring 42, so that the striker 10 enters the striker entrance 510. , 610 is engaged with the latch 2.
Even if the unlocking operation is mistakenly performed and the striker 10 and the latch 2 are disengaged, the striker 10 cannot get out of the striker entrances 510 and 610 by being caught by the hook portion 41 of the safety lever 4. The hood never opens unexpectedly.
As described above, since the safety lever 4 is not subjected to a strong lifting force by the striker 10 unless the latch 2 and the striker 10 are disengaged, the inner plate 5 and the outer plate 6 constituting the base 1 are not applied. It is sufficient to attach only to the inner and outer plates 6.

In some cases, the safety lever 4 may not be provided, and an open lever that disengages the detent lever and the latch by rotating is attached to the base.
The latch device of the present invention can also be used for fixing the shutter and the building opening, fixing the gate and the gate pillar, and the like.

The front view of the latch apparatus which shows the Example of this invention. The bottom view of the latch apparatus which shows the Example of this invention. The principal part sectional drawing of the latch apparatus which shows the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 2 Latch 20 Through-hole 21 Notch 3 Detent lever 30 Through-hole 4 Safety lever 40 Slide protrusion 41 Hook part 42 Spring 5 Inner plate 51 Front plate 510 Strike advance 511, 514 Reinforcement rib 512, 515 Through-hole 513, 516 Tube Part 52 Side wall 53 Fixed piece 6 Outer plate 61 Front plate 610 Strike advance 611, 614 Reinforcement rib 612, 615 Through hole 613, 616 Cylindrical portion 617 Arc-shaped hole 62 Side wall 63 Fixed piece 7 First rotating shaft 70 Head 8 Second rotating shaft 80 Head 9 Third rotating shaft 10 Striker

Claims (2)

  A base, a base attached to the base so as to be pivotable by a first pivot shaft, and a latch which engages with and disengages from the striker along with the pivot, and a base pivotally attached to the base by a second pivot shaft. The latch device includes a detent lever that engages and disengages from the latch with the rotation and restricts the rotation of the latch when engaged, and the base is formed by overlapping an inner plate and an outer plate, A latch and a detent lever are disposed between the inner plate and the outer plate, the outer plate through the first rotating shaft, the latch and the inner plate, the outer plate through the second rotating shaft, A latch device characterized by passing through a detent lever and an inner plate. At the attachment point of the latch and detent lever, a through hole is formed in each of the inner plate and the outer plate, and a cylindrical portion protruding in the opposite direction along the periphery of the through hole is formed. A through-hole corresponding to the through-hole is formed, the first rotating shaft and the second rotating shaft are inserted through the through-hole and the through-hole, respectively, and both ends thereof are crimped to form a head. The latch device according to claim 1.

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