JP2660675B2 - Rotary latch type flat handle device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary latch type flat handle device used for various equipment storage boxes and vehicles.

[0002]

2. Description of the Related Art A latch case fixed to a door; and a locking projection which is engaged with and disengaged from a metal receiving portion on a fixed frame side are provided on a front surface of a base end portion.
A rotary latch having a passive projection provided on the front surface of the distal end when the door is closed, which is in contact with the front side of the receiving part, and an intermediate part pivotally attached to the base end of the latch case by a fixed pivot; and a fixing pin at the intermediate part of the latch case and rotating. A dead point where each end is attached to a movable pin on the base end side of the latch and that urges the rotary latch to rotate in the locking direction or the unlocking direction according to the position occupied by the movable pin with respect to the straight line connecting the fixed pivot and the fixed pin. A rotary latch device comprising a mechanism spring is already known.

[0003] In this rotary latch device, when the door is opened and closed, a locking projection and a passive projection come into contact with the front surface or the back surface of the receiving portion on the fixed frame side, so that the rotation latch is automatically rotated in the locking direction or the unlocking direction. Therefore, it has excellent one-touch operability and is used in various fields.

However, when used in an environment of severe vibration, when the natural frequency of the spring for the dead point mechanism matches the frequency of external vibration, the spring accidentally expands and contracts due to the resonance phenomenon, thereby causing rotation. The latch may rotate in the unlocking direction and lose the locking function.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rotary latch type in which the locking function is not lost due to the resonance phenomenon of the spring even when used in a vibration environment, and the unlocking can be easily performed by a single operation. It is to provide a planar handle device.

[0006]

The rotary latch type flat handle device of the present invention will be described below with reference to the reference numerals in the accompanying drawings. The handle 2 is pivotally attached to the base end of the handle case 1 by the transverse pivot 3. An immersion spring 4 inserted between the handle 2 and the handle case 1 urges the handle 2 to rotate in the immersion direction. The rotating latch 14 is housed in a latch case 6 protruding from the rear side of the handle case 1, and the intermediate portion of the rotating latch 14 is pivoted to the base end of the upper and lower side walls of the latch case 6 by a fixed pivot 9 parallel to the transverse pivot 3. To wear.

[0007] A locking projection 18 is provided on the front surface of the base end portion of the rotary latch 14 so as to be engaged with and disengaged from the back surface of the metal receiving portion 21 on the fixed frame 17 side. A passive projection 19 is provided to project from the front surface of the tip of the rotary latch 14. A fixed spring receiving portion 1 is provided between the front ends of the upper and lower side walls of the latch case 6.
1 is fixed, and the movable spring receiving portion 10 is fixed between the locking projection 18 of the rotation latch 14 and the fixed pivot 9. Each end of the dead point mechanism spring 12 is attached to the fixed spring receiving portion 11 and the movable spring receiving portion 10, and the fixed pivot 9 and the fixed spring receiving portion 11 are attached.
The rotational latch 14 is urged to rotate in the locking direction or the unlocking direction according to the position occupied by the movable spring receiving portion 10 with respect to the straight line connecting.

The slot 22 in the left-right direction of the latch case 6
The lock plate 8 is slidably inserted into the lock latch 8 and is engaged with the stop recess 13 at the base of the passive projection 19 of the rotary latch 14 to restrain the rotary latch 14 from rotating in the unlocking direction. The lock plate 8 is slidably urged in the direction in which the rotation latch 14 is held by the restraining spring 7 inserted between the latch case 6 and the lock plate 8. Pull out handle 2 when turning handle 2
The lock plate 8 is slid to the constraint release position by the operation arm 5 protruding from the rear surface of the base end of the lock plate 8. The arrangement directions of the dead point mechanism spring 12 and the restraint holding spring 7 are different from each other.

[0009]

When the door 16 is closed and the fixed frame 17 is locked as shown in FIGS. 1 and 2, the handle 2 is immersed in the handle case 1 and the locking projection of the rotary latch 14 is locked. Reference numeral 18 is in contact with the back surface of the receiving portion 21 on the fixed frame 17 side. Since the movable spring receiving portion 10 is positioned on the side of the metal receiving portion 21 with respect to the straight line connecting the fixed pivot 9 and the fixed spring receiving portion 11, the dead point mechanism spring 12
4 is rotationally urged in a clockwise direction around the fixed pivot 9, that is, in a locking direction, and the locking projection 18 is firmly engaged with the metal receiving portion 21. The lock plate 8 is urged by the restraint holding spring 7 to a position where the lock plate 8 is engaged with the stop recess 13 of the rotary latch 14.

In such a state, even if the dead point mechanism spring 12 resonates with external vibrations from a certain direction, the arrangement direction of the dead point mechanism spring 12 is different from that of the dead point mechanism spring 12. No resonance phenomenon occurs, and the rotation constraint of the rotary latch 14 by the lock plate 8 is accurately maintained. Therefore, the rotation latch 14
The lock of the door 16 due to is not released.

To release the lock and open the door 16, the handle 2 may be pulled out of the handle case 1 and rotated against the urging of the spring 4 for immersion. When the handle 2 is pulled out and rotated, the operation arm 5 on the rear surface of the proximal end portion retracts and slides the lock plate 8 against the spring 7 so that the lock plate 8
Escapes from the stop recess 13 of the rotation latch 14, so that the rotation constraint of the rotation latch 14 in the unlocking direction is released. When the door 16 is pulled forward and the opening force is applied, the rotation latch 14 is pressed against the bias of the dead point mechanism spring 12.
Rotate counterclockwise about the fixed pivot 9.

At the moment when the movable spring receiving portion 10 moves to the opposite side to the metal receiving portion 21 with respect to the straight line connecting the fixed pivot 9 and the fixed spring receiving portion 11, the biasing direction of the dead point mechanism spring 12 is reversed and rotated. The latch 14 rotates rapidly in the unlocking direction.
Thereby, the locking projection 18 of the rotation latch 14 is detached from the metal receiving portion 21 on the fixed frame 17 side, and the lock of the door 16 with respect to the fixed frame 17 is released.

When the door 16 is closed as shown in FIG. 4, the passive projection 19 of the rotary latch 14 comes into contact with the front side of the receiving part 21 at the end of the closing operation. Further, when the door 16 is closed, the passive projection 19 is pushed from the metal receiving part 21, so that the rotation latch 14 rotates clockwise around the fixed pivot 9 against the bias of the dead point mechanism spring 12. Let me do. The biasing direction of the dead point mechanism spring 12 reverses at the moment when the movable spring receiving portion 10 moves toward the metal receiving portion 21 with respect to the straight line connecting the fixed pivot 9 and the fixed spring receiving portion 11,
The rotation latch 14 rotates rapidly in the locking direction, and the locking projection 18
The door 16 is locked again to the fixed frame 17 by engaging with the back side of the receiving part 21.

[0014]

In the illustrated embodiment, the immersion spring 4 of the handle 2 is constituted by a torsion spring, a coil part 4a is fitted on the transverse pivot 3, and one straight end 4b is provided on the rear surface of the base end of the handle 2. The other straight end 4c is in contact with the bottom plate of the handle case 1. The spring 7 for holding the lock plate is composed of a compression coil spring. The support dead point mechanism spring 12 is formed of a tension coil spring. The handle case 1 and the latch case 6 are formed separately, and the connection leg 15 of the latch case 6 is welded to the bottom plate of the handle case 1.

An operation arm 5 formed of a U-shaped plate is welded to the rear surface of the base end of the handle 2, and a transverse pivot 3 of the handle 2 crosses the operation arm 5. The handle case 1 is fixed to the door 16 by screws 20. Both the fixed spring receiving portion 10 and the movable spring receiving portion 11 are constituted by pins.

[0016]

As described above, in the rotary latch type flat handle device of the present invention, the intermediate portion of the rotary latch 14 is pivotally mounted on the latch case 6 behind the handle case 1 by the fixed pivot 9.
A locking projection 18 that engages with the back surface of the receiving portion 21 on the fixed frame 17 side is protruded from the front surface of the base end portion of the rotation latch 14, and the receiving portion 2 is provided.
1 is provided on the front surface of the front end portion of the rotary latch 14 so as to project from the front surface of the rotary latch 14.
A spring 12 for a dead point mechanism is mounted between the movable spring receiving portion 11 of the rotary latch 14 and the lock plate 8 mounted on the latch case 6 is engaged with the stop recess 13 of the rotary latch 14 to unlock the rotary latch 14. Restrained from rotating in the direction
The arrangement directions of the constraint holding spring 7 and the dead point mechanism spring 12 for slidingly urging the lock plate 8 to the constraint establishment position are made different from each other, and the operation arm on the back surface of the base end of the handle 2 when the handle 2 is pulled out and rotated. Since the lock plate 8 is retracted and slid to the restraint release position at 5, there is no loss of the locking function due to the resonance phenomenon of the spring even when used in a vibration environment.
Further, the door 16 can be easily unlocked by a single operation of pulling out and rotating the handle 2.

[Brief description of the drawings]

FIG. 1 is a front view showing a locked state of a rotary latch type flat handle device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a left side view of the rotating latch type flat handle device in an unlocked state.

FIG. 4 is a cross-sectional view of the rotating latch type flat handle device in an unlocked state.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 handle case 2 handle 3 transverse pivot 4 spring for immersing handle 5 operating arm 6 latch case 7 spring for restraint 8 lock plate 9 fixed pivot 10 movable spring receiving part 11 fixed spring receiving part 12 dead point mechanism spring 13 stop recess Reference Signs List 14 Rotating latch 15 Latch case connecting leg 16 Door 17 Fixed frame 18 Locking projection of rotating latch 19 Passive projection of rotating latch 20 Screw for fixing handle case 21 Metal receiving part of fixed frame 22 Lock plate sliding slot

Claims (1)

(57) [Claims] 1. A handle case 1 embedded and fixed in a door 16; housed in the handle case 1 so as to protrude and retract from the front side, and a base end portion of the handle case 1 by a transverse pivot 3.
A handle 2 pivotally attached to the base ends of the upper and lower side walls of the handle case; an immersion spring 4 inserted between the handle 2 and the handle case 1 to urge the handle 2 to rotate in the immersion direction: the back side of the handle case 1 And the latching case 6 protruding from the latch case 6 is housed in the latching case 6 so that the locking projection 18 at the base end thereof is engaged with and disengaged from the back surface of the metal receiving portion 21 on the fixing frame 17 side. The intermediate portion is pivotally connected to the base ends of the upper and lower side walls of the latch case 6 by the pivot 9.
A rotary latch 14 projecting from the front end thereof with a passive projection 19 abutting on the front side of the latch case 6; a fixed spring receiving portion 11 fixedly mounted at the middle of the front end of the upper and lower side walls of the latch case 6; Movable spring receiving portion 10 fixed between pivots 9
Each end is attached to the fixed spring receiving portion 11 and the movable spring receiving portion 10, and the rotation latch 14 is locked according to the position occupied by the movable spring receiving portion 10 with respect to the straight line connecting the fixed pivot 9 and the fixed spring receiving portion 11. A spring 12 for a dead point mechanism that urges rotation in the unlocking or unlocking direction; is slidably inserted into a slot 22 in the left-right direction of the latch case 6 and is inserted into a stop recess 13 at the base of the passive projection 19 of the rotating latch 14. A lock plate 8 which is engaged to restrain the rotation latch 14 so as not to rotate in the unlocking direction; inserted between the latch case 6 and the lock plate 8;
The lock plate 8 comprises a constraint holding spring 7 which slidably urges the lock plate 8 in the direction in which the rotation latch 14 is established. When the handle 2 is pulled out and rotated, the lock plate 8 is released by the operation arm 5 on the rear surface of the base end of the handle 2. A rotary latch-type flat handle device which slides to a position and in which the arrangement directions of the dead point mechanism spring 12 and the restraint holding spring 7 are different from each other.