JP3074891U - Corner type latch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corner type latch which can be easily and inexpensively manufactured and assembled, has no danger of leaving a cover plate in an unlocked state due to misidentification, and is not accidentally unlocked by contact with another object. Provide equipment. SOLUTION: An end portion of a bent side portion 2B of an L-shaped operation lever 2 is connected to a bearing plate portion 1a projecting from a bent side portion 1B of an L-shaped base plate 1 by a first pivot 9.
The base end of the latch 3 is connected to the junction of the main side portion 2A and the bent side portion 2B of the operation lever 2 by a second pivot 4 parallel to the first pivot 9, and the latch 3 is flipped up by a first spring 5. In the locked state in which the leading end of the latch 3 is engaged with the catch 6, the second pivot 4 is closer than the straight line passing through the engaging portion C between the latch 3 and the catch 6 and the first pivot 9. The second pivot 4 and the first pivot 9 are located on the main side 1A side of the base plate 1.
Place.

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latch device used for fastening and locking a lid to a box body or the like.

[0002]

2. Description of the Related Art Conventionally provided latch devices are mainly of a flat type in which a base plate and a receiver are arranged on the same plane, and a corner type in which an arrangement surface of a base plate and an arrangement surface of a receiver are perpendicular to each other. Due to the large number of parts and mechanical complexity, the cost of manufacturing and assembling was high.

In addition, since the latch is simply connected to the operation lever by a pivot, it is necessary to lift the operation lever to disengage the latch from the catch, and then to flip the latch separately. is there. In other words, the operability was not good because the locking and unlocking were performed in two stages.

[0004] Since the latch does not have autonomy, when the finger is released, it falls down on the receiver. Since this laid-down state is morphologically similar to the locked state in which the catch and the latch are normally engaged, there is a danger that the laid-down state will be mistaken for the establishment of the locked state, and the cover plate will be left in the unlocked state. There is.

[0005]

[Problem to be Solved by the Invention] Therefore, the purpose of the present invention is to make it easy and inexpensive to manufacture and assemble, and because the latch is self-sustaining, there is no danger of the lid plate being left in an unlocked state due to misidentification. It is another object of the present invention to provide a corner-type latch device in which the operation lever does not accidentally move in the unlocking direction due to contact with another object.

[0006]

The latch device according to the present invention will be described with reference to the reference numerals in the accompanying drawings. In the latch device according to the present invention, the L-shaped base plate 1 is provided with a bearing plate 1a protruding from a bent side portion 1B. The distal end of the bent side portion 2B of the L-shaped operation lever 2 is connected by a first pivot 9, and the base end of the latch 3 is connected to the main side of the operation lever 2 by a second pivot 4 parallel to the first pivot 9. 2A and the bent side portion 2B are connected to each other, and the latch 3 is rotationally urged by the first spring 5 in a flip-up direction. The second pivot 4 and the first pivot 9 are arranged so that the pivot 4 is located closer to the main side 1A of the base plate 1 than a straight line passing through the engaging portion C between the latch 3 and the catch 6 and the first pivot 9. On the back side of the rotor 7 housed in the main side portion 2A of the operation lever 2, a locking projection 7a is provided which is engaged with and disengaged from the receiving projection 1b on the main side portion 1A side of the base plate, and is provided on the front side of the rotor 7. The plug 1 is housed in the keyhole 7b, and the plug 11 is moved and urged by the second spring 12 to close the key insertion opening 2a of the operation lever 2.

In use, for example, the main side portion 1 A of the base plate 1 is fixed to the front surface of the cover plate 14, and the receiver 6 is fixed to the side surface of the box body 13. When the cover plate 14 is tightened and locked to the box body 13, the tip of the latch 3 is engaged with the receiver 6 as shown by the imaginary line in FIG. 14, the second pivot 4 comes closer to the main side 1A of the base plate 1 than a straight line passing through the first pivot 9 and the point of engagement C between the latch 3 and the catch 6. The locking projection 7a of the rotor 7 is engaged with the receiving projection 1b on the main side 1A of the base plate 1, and the operating lever 2 is restrained by the base plate 1.

In order to release the cover plate 14 by releasing the lock, a predetermined key 18 is inserted into the key insertion slot 2 a of the main side 2 A of the operation lever 2, and the plug 11 is pushed back with the key tip. It is deeply engaged with the keyhole 7b of the rotor 7. Thereafter, the key 18 is operated to rotate the rotor 7 by a predetermined angle, and the locking projection 7a of the rotor 7 is disengaged from the receiving projection 1b on the base plate 1 side, thereby releasing the constraint of the operation lever 2 to the base plate 1. .

When the user puts his / her finger on the tip of the main body side portion 2 A and pulls up and rotates the operation lever 2 around the first pivot 9, the second pivot 4 that has turned upward moves in the direction of the receiving metal 6. Therefore, the tip of the latch 3 tilted and rotated about the second pivot 4 is detached from the receiver 6. The latch 3 is automatically jumped up to the position indicated by the solid line in FIG. Therefore, the lid 14 can be opened without fear that the latch 3 and the receiver 6 are re-coupled, and the tip of the latch 3 does not collide with the receiver 6 even when the lid 14 is closed.

After the cover plate 14 is closed, the latch 3 is pushed down to the lying position, and then the operating lever 2 is pushed down and rotated about the first pivot 9, whereby the second pivot 4 engages with the latch 3 and the catch 6. When it comes closer to the main side 1A of the base plate 1 than the straight line passing through the joint point C and the first pivot 9, the tip of the latch 3 is deeply engaged with the catch 6, and the cover plate 14 is moved toward the box body 13. Tightened and locked.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In the illustrated embodiment, the base plate 1 has a bent side portion 1B abutting against an end face of a lid plate 14, while a main side portion 1A abuts against a front portion of the lid plate 14 to cover the lid. It is fixed to the plate 14. This fixing is performed by a fixing tool such as a screw passing through the four through holes 17 of the main side portion 1A. The receiving metal 6 is fixed to the side surface of the box body 13 by a fixing tool such as a screw passing through three through holes 16.

The self-supporting first spring 5 of the latch 3 is constituted by a torsion coil spring, left and right coil portions 5 a of the first spring 5 are fitted to the second pivot 4, and a central U-shaped portion 5 b is a back surface of the latch 3. The right and left straight portions 5c are in contact with the front side of the main side 1A of the base plate 1 through the spring receiving grooves 10 on the operation lever 2 side. The second spring 12 for urging the plug 11 is constituted by a compression coil spring. The rotor 7 is accommodated in the main side portion 2A of the operation lever 2 from the rear side, and is prevented from being pulled out by the back plate 8. The back plate 8 is fixed to the main side portion 2A by three tapping screws 15. The locking projection 7a of the rotor 7 projects rearward from the back plate 8.

[0013]

As described above, in the latch device of the present invention, the base plate 1 is an L-shaped member composed of the main side portion 1A and the bent side portion 1B, and the operation lever 2 is formed of the main side portion 2A and the bent side portion 2B. A bent side portion 2B of the operation lever 2 is connected to a bearing plate portion 1a of a bent side portion 1B of the base plate 1 by a first pivot shaft 9, and a main side portion 2A of the operation lever 2 and a bent side are formed. Since the base end of the latch 3 is connected to the meeting portion of the portion 2B by the second pivot 4, it is used as a corner-type latch device in which the arrangement surface of the base plate 1 and the arrangement surface of the catch 6 are perpendicular. For example, by attaching the cover plate 14 to a corner portion that straddles the end surface of the cover plate 14 and the side surface of the box body 13, the cover plate 14 can be properly tightened and locked to the box body 13. In addition, since the number of parts is reviewed and the structure is mechanically simplified, the manufacture and assembly can be performed easily and at low cost.

Since the latch 3 is urged to rotate in the flip-up direction by the first spring 5, the second pivot 4 is moved more than the straight line passing through the engaging portion C between the latch 3 and the catch 6 and the first pivot 9. When the second pivot 4 moves over the bent side portion 1B of the base plate 1, the latch 3 is automatically flipped up and rotated, so that the unlocking operation can be smoothly performed by a series of operations, and the operability is excellent. ing. In addition, the latch 3 is provided with autonomy by the first spring 5, and in the unlocked state, the latch 3 is always in a position where it is flipped up, so that the locked state and the unlocked state can be easily confirmed, The lid plate and the like are not left unlocked.

The rotor 7 is accommodated in the main side portion 2A of the operation lever 2, and a locking projection 7a is provided on the rear side of the rotor 7 to be engaged with and disengaged from the receiving projection 1b of the main side portion 1A of the base plate. The main side 2A of the operating lever 2 can be restrained to the main side 1A of the base plate 1 in response to the rotation of the operating lever 2, and the operating lever 2 is unintentionally rotated in the unlocking direction due to contact with another object or the like. Operation can be reliably prevented, and the security of tightening and locking can be improved.

The plug 1 is housed in a keyhole 7 b provided on the front side of the rotor 7, and the plug 11 is moved and biased by the second spring 12 in the closing direction of the key insertion opening 2 a of the operation lever 2. Intrusion of rainwater or the like via the keyhole 7b can be prevented, and a corner type latch device excellent in dustproof and waterproof properties can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view of a corner type latch device according to an embodiment of the present invention in an unlocked state.

FIG. 2 is a rear view of the latch device in an unlocked state.

FIG. 3 is a sectional view taken along line AA in FIG. 1, showing a locked state by imaginary lines.

FIG. 4 is a bottom view of the latch device in a locked state.

[Description of Signs] 1 Base plate 1A Main side portion of base plate 1B Bent side portion of base plate 1a Bearing plate portion of base plate 1b Receiving projection of base plate 2 Operating lever 2a Key slot 2A Main side portion of operating lever 2B Bending side of operating lever Part 3 Hook 4 Second pivot 5 First spring for urging latch 6 Receptacle 7 Rotor 8 Back plate 9 First pivot 10 Spring receiving groove 11 Plug body 12 Spring for urging plug body 13 Box body 14 Cover plate 15 Back plate Fixing screw 16 Fixing through hole for receiving metal 17 Fixing through hole for base plate 18 Key

Claims (1)

[Utility model registration claims] 1. An end portion of a bent side portion 2B of an L-shaped operation lever 2 is connected to a bearing plate portion 1a projecting from a bent side portion 1B of an L-shaped base plate 1 by a first pivot 9.
The base end of the latch 3 is connected to the junction of the main side portion 2A and the bent side portion 2B of the operation lever 2 by a second pivot 4 parallel to the first pivot 9, and the latch 3 is flipped up by a first spring 5. In the locked state in which the leading end of the latch 3 is engaged with the catch 6, the second pivot 4 is closer than the straight line passing through the engaging portion C between the latch 3 and the catch 6 and the first pivot 9. The second pivot 4 and the first pivot 9 are located on the main side 1A side of the base plate 1.
And a locking projection 7a that engages with and disengages from the receiving projection 1b on the main side portion 1A of the base plate is provided on the back side of the rotor 7 housed in the main side portion 2A of the operation lever 2. A corner type latch device in which the plug 1 is housed in the provided keyhole 7b, and the plug 11 is moved and urged by the second spring 12 to close the key insertion opening 2a of the operation lever 2.