JPH0130513Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention has a lock piece housed in a lock box of a male lock member that can be moved forward and backward with a key, and is biased by a spring and protrudes from the front of the lock box of a female lock member. Regarding the improvement of a type of lock in which the locking protrusion of the locking piece is removably inserted and locked into the engaging part that interlocks with the push member, it is mainly applied to the opening of a trunk-shaped box-shaped case. This relates to a lock in which a male lock member and a female lock member are provided oppositely on both edges.

Conventionally, in this type of lock, the structure of the locking piece housed in the lock box of the male locking member is complicated, for example, two locking pieces are stacked one on top of the other, and one of them is attached to a movable piece. The other is a fixed piece, and the engaged step part provided on one side edge of the movable piece is arranged so as to be able to engage and detach from the engaging step part provided on one side edge of the fixed piece. At the same time, both sides of the fixed piece are made to stand up to hold the movable piece, and in order to prevent these locking pieces from moving unnecessarily within the lock box, a seat plate, leaf springs, etc. are assembled. Because of the intricate structure, the structure is complicated, failures occur frequently, and there are problems in terms of economics, such as high costs.

In order to deal with the above-mentioned problems, the present invention significantly simplifies the structure of the lock piece housed in the lock box of the male lock member, thereby preventing the occurrence of failures and ensuring easy and reliable assembly. The locking and unlocking operations can be performed smoothly by keeping the movement light, and the locking and unlocking sounds can be generated when the locking piece is activated, making it possible to confirm the locking and unlocking status audibly. It was developed and completed with the aim of providing a lock with a lock at a low cost.The lock piece housed in the lock box of the male lock member can be moved forward and backward with a key, and a spring is attached to the front of the lock box of the female lock member. In a lock configured such that the locking protrusion of the locking piece is removably inserted into and engaged with the engaging part that interlocks with the protruding pusher member that is biased by the locking member, the metal plate is folded in two. a locking piece having a restoring spring pressure, a locking protrusion provided on the back surface of the locking piece, and the locking protrusion provided on the surface of the base plate of the male locking member. Pertains to a lock configured such that the locking protrusion is placed close to the locking protrusion, and when the locking piece moves forward or backward, the protrusion to be locked crosses over the locking protrusion and is snap-locked in front of and behind the locking protrusion. It is something.

The lock constructed as described above locks and unlocks the lock by moving a single lock piece housed in the lock box of the male lock member forward and backward by rotating the insertion key. In other words, when the key is inserted from the front side of the lock box of the male lock member and rotated clockwise, the locking piece that is engaged with the key will cause the protrusion to be locked provided on the back side of the lock piece to engage with the base plate of the male lock member. It moves forward over the locking protrusion provided on the surface, and inserts and locks the locking protrusion of the locking piece into the engaging portion provided in the lock box of the female locking member. When this protrusion to be locked passes over the locking protrusion, the locking piece itself makes a locking sound due to the pressure of the restoring spring, and the protrusion and the protrusion remain engaged, so the locking piece will reliably retreat. It will not be blocked and unlocked unexpectedly. In addition, when unlocking, by rotating the key counterclockwise,
Through the process reverse to the above, the locking protrusion is disengaged from the engaging part of the female locking member and retreated with the generation of an unlocking sound,
It is used to unlock the door.

Next, an embodiment of the present invention will be described based on the accompanying drawings. The lock of the present invention is composed of a male locking member A and a female locking member B.

The male lock member A consists of a base plate 1 and a lock box 2 covered with the base plate. A positioning pin 4 is provided upright to be inserted into the hole at the tip of the key to hold the key in a predetermined position, and a locking protrusion 5 is provided on the surface of the board at a position diagonally above the pin. , supporting pieces 6, 6 for regulating the movement position of the locking piece, which will be described later.
And stoppers 7, 7 are provided protrudingly. Inside the lock box 2, a locking piece 8 consisting of an upper piece 8a and a lower piece 8b, which are made by punching a steel plate into a desired shape, folding it in half horizontally, and applying an appropriate restoring spring pressure, is housed in the locking box 2 in the horizontal direction. An engaging recess 9 for the tip of the key is provided at the middle lower side of the lower piece 8b of the locking piece 8, and an engaging recess 9 for the key tip is provided on the back surface of the lower piece, in this embodiment, located near the right side of the engaging recess 9. A locking protrusion 10 that is locked to the locking protrusion 5 of the substrate 1 is provided in a protruding manner, and the lower piece 8b
In this embodiment, a locking protrusion 11 extending rightward in this embodiment is branched and projectingly provided at the upper base end of the locking protrusion 11 when the locking piece 8 moves forward and backward. The lock box 2 is configured so as to appear and retract from the left side below the notch hole 12 formed in the middle part of the upper edge flange. In the figure, 13 is a key hole formed on the surface of the lock box 2, 1 shows a mounting leg of the board 1, and 15 shows a mounting piece of the lock box 2, respectively.

The female lock member B consists of a substrate 16 and a lock box 17 covered with the substrate 1, and a coil spring 19 is fitted into the lock box 17 by fitting into a protrusion 18 provided at the center of the substrate 16. A push-button type push member 21 is inserted into the front opening 20 of the lock box 17 in contact with the coil spring 19, and the front surface of the push member is projected from the lock box by spring pressure. Engagement part 2 with a U-shaped cross section formed by bending the downward extending end of the
2 protrudes downwardly and externally from a notch hole 23 formed in the middle of the lower edge flange of the lock box 17, and the engaging portion 22 is configured to move forward and backward together with the push member 21.

The male locking member A and the female locking member B configured as described above are used by being attached to the case body and the lid, respectively, at the opening of, for example, a trunk-shaped box-shaped case C, as shown in the drawing. Next, the locking operation will be explained based on the drawings.

First, when the main body and the lid of the case C are closed together and the engaging part 22 of the female lock member B is press-fitted into the notch hole 12 of the lock box 2 of the male lock member A, the spring pressure of the coil spring 19 The tip of the engaging portion 22 that is urged to move forward is connected to the notch hole 12.
The case C is closed by being engaged with the front edge of the case C. In this state, as shown in FIG.
When the key K is inserted into the lock box 2 and rotated clockwise, its tip actuating part engages with the engagement recess 9 of the lower piece 8b of the locking piece 8 and moves the locking piece 8 laterally. . As the locking piece 8 moves, the locking protrusion 10 provided on its back side overcomes the locking protrusion 5 on the base plate 1 of the male locking member A against the spring pressure of the locking piece. While engaging, the lock protrusion 11 is made to protrude below each notch hole 3, 12 of the base plate 1 and the lock box 2,
It is to be engaged with the engaging portion 22 of the female locking member B that is press-fitted into the notch hole, and thus the male locking member and the female locking member are integrally engaged to perform the required locking. It is.

When unlocking, turn the key in the opposite direction to move the locking piece 8 backward, disengage the locking protrusion 11 from the engagement part 22, and unlock the lock. After that, push the push member 21. Push the engaging part 22 backward,
The engagement part 22 and the front edge of the notch hole 12 are disengaged to make the case C openable.
In both cases when the locking piece 8 moves forward and backwards,
When the locking protrusion 10 moves over the locking protrusion 5, the locking protrusion 10 hits the surface of the board 1 by the restoring spring pressure of the locking piece itself, producing a locking sound and an unlocking sound. Since it generates a locking sound, you can audibly check whether it is locked or unlocked.

As detailed above, the present invention has a significantly simpler structure of the lock piece installed in the lock box of the male lock member than the conventional locks of this type described above, and is made by bending a single metal plate. Since it is composed of a single piece, it is lightweight and can move forward and backward smoothly and easily to lock and unlock the lock, and can be mass-produced at low cost.The locking piece can also be easily attached to a board, etc. by the restoring spring pressure of the locking piece itself. This structure, together with the engagement relationship between the locking protrusion and the locking protrusion, prevents accidental unlocking and locking, and allows the user to hear the locked/unlocked state. It also has the advantage of being able to be confirmed visually.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; Fig. 1 is a front view of the case installed in the opening of a trunk-like case, and Fig. 2 shows the male lock member before locking with the opening of the case closed. 3 is a sectional view taken along line A-A in FIG. 2, FIG. 4 is a sectional view taken along line BB in FIG. 2, and FIG. 5 is an enlarged perspective view of the locking piece. Figure 6 is an inner view of the male lock member after locking, Figure 7
The figure is a sectional view taken along line CC in FIG. 6. A... Male lock member, B... Female lock member, 1... Board, 2... Lock box, 5... Locking protrusion, 8... Locking piece, 10... Locking protrusion, 11 ...Lock protrusion,
17... Lock box, 19... Spring, 21... Push member, 22... Engaging portion.

Claims (1)

[Scope of utility model registration request] A locking piece housed in a lockbox of a male locking member is configured to be movable forward and backward with a key, and the locking piece is locked in an engaging portion that interlocks with a pusher member that is biased by a spring and protrudes from the front surface of the lockbox of a female locking member. In a lock configured to lock by removably inserting a piece of locking protrusion, a metal plate is folded in two to form a locking piece with a restoring spring pressure, and a locking piece is attached to the back side of the locking piece. A locking protrusion is provided, and the locking protrusion is arranged close to the locking protrusion provided on the surface of the base plate of the male lock member, so that the locking protrusion is disposed in close proximity to the locking protrusion provided on the surface of the base plate of the male lock member, and the locking protrusion is disposed close to the locking protrusion provided on the surface of the base plate of the male lock member. A lock configured such that the strip passes over a locking projection and is locked in an elastic manner at the front and rear of the locking projection.