JPS5817880Y2 - lock - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a so-called gun lock type lock used for a drawer or the like on a drawer door.

Conventionally, this type of lock is provided with a dead bolt (B) on a lock plate A so that it can slide freely so that its tip can move in and out of the lock plate A, as shown in FIG. A cotton spring C is provided between the plate A and the bolt B to stabilize it in the protruding position and the retracted position.
The tip of a rotating pawl rotatably attached to the lock plate A is engaged with a notch B1 provided in the lock plate B, and the locked bolt B is moved forward and backward by turning the pawl with a key.

However, with such conventional locks, the spring force of the wire spring C acts as a sliding resistance for the deadbolt B, making locking and unlocking operations very difficult.

In addition, since the completion position of advancing and retracting the dead pole (B) is not certain, the rotating pawl is often turned too much, and the pawl unexpectedly comes off from the notch B1, leading to erroneous operation. Rotating claws were often deformed or damaged.

As a result, the secondary lock is extremely prone to failure and is of little practical use.

In view of these points, the present invention aims to provide a lock that is trouble-free, operates reliably, and has excellent operability.The structure of the lock is as follows.

The present invention includes a deadbolt that is linearly slidable in a lock case so that its tip can move in and out of the case, and a rotating body that is rotated by a key, and the deadbolt has a projection that rotates. The movable body is provided with an engaging portion with which the protrusion can be engaged with sufficient play, and a leaf spring having a convex portion is provided on one side of the tied bolt and the inner wall of the lock case facing the bolt, and a plate spring is provided on the other side. This is a lock characterized by providing a notch portion that engages with the convex portion when the deadbolt is extended and retracted.

Embodiments of the present invention will be described below with reference to the drawings.

Here, the vertical and horizontal positional relationships of this lock will be explained according to the drawings, but it goes without saying that such positional relationships will change depending on the part of the furniture to which the lock is attached.

1 is a lock case, 2 is a threaded bolt, 3 is a rotating body, 4 is a pin as a protrusion of the threaded bolt 2, and 5 is a lock case lid.

The lock case 1 is provided in the center between an L-shaped furniture attachment part 11.12, a pair of upper and lower parallel guide walls 13.14 and a stopper wall 15, and the upper and lower guide walls 13.14. The mounting part 1 is equipped with a rotating body mounting part 16.
2 is provided with an entry/exit hole 17 for the threaded bolt 2.

18... are screw holes. The threaded bolt 2 is formed into a bifurcated shape, and the tip end 23 can move in and out of the lock case 1 through the entrance/exit hole 17 with the upper and lower slide legs 21 and 22 sandwiching the rotating body attachment part 16 of the lock case 1. It is installed so that it can be slid left and right.

A stepped portion 24 is formed at the boundary between the tip portion 23 and the lower slide leg 22, and as this stepped portion 24 comes into contact with the inner surface of the mounting portion 12, the amount of protrusion of the bolt tip portion 23 from the lock case 1 is constant. regulated by.

Furthermore, when the bolt 2 is retracted, the end surfaces of the slide legs 21 and 22 come into contact with the stopper wall 15.

The upper sliding leg 21 of the threaded bolt 2 has a bulge 25.
are provided parallel to the upper guide wall 13 of the lock case 1, and two triangular notches 26.2 are provided on the upper surface of the bulge 25.
7 is provided.

A leaf spring 6 having a triangular protrusion 61 that can selectively engage the notch 26.27 is attached to the inner surface of the upper guide wall 13 facing the notch 26,27.

The notches 26 and 27 of the bulge 25 are spaced apart from each other by a distance equivalent to the slide stroke of the bolt 2, and as shown in FIG. 61 engages with the notch 27 on the right side (rearward with respect to the bolt projecting direction), and as shown in FIG. 3, when the bolt 2 is retracted, the protrusion 61 engages with the notch 26 on the left side. .

In this case, as shown in the opening of Figure 4, the convex portion 6
1 and the right notch 27 are engaged with each other in such a manner that their left side surfaces, that is, the front surfaces 61a and 27a in the direction of bolt protrusion are in contact with each other, and as shown in the opening of FIG.
and the left side notch 26 are engaged with each other in such a state that their right side surfaces, that is, the front surfaces 61b and 26a in the bolt retraction direction are in contact with each other.

In this manner, the positional relationship between the convex portion 61 and the cut portions 26, 27 is set.

In this way, the deadbolt 2 is firmly held without wobbling both when the bolt is extended and when it is retracted.

Further, when the convex portion 61 and the cut portions 26, 27 are engaged, a clear locking portion is generated due to the collision of these surfaces.

The rotating body 3 has a key engaging part 31 on its surface that is engaged with f$7, and a mounting shaft 32 whose axis coincides with that of the retaining part 31 projects directly behind this key engaging part 31. This mounting shaft 32 is
The rotating body 3 is rotatably attached to the rotating body mounting portion 16 by being inserted into a hole 17 provided in the rotating body mounting portion 16 of the lock case 1 .

Further, a fan-shaped recess 33 as a pin engagement part is formed at the tip of the back surface of this rotating body 3, and this recess 33 is engaged with a pin 4 attached to the lower slide leg 22 of the deadbolt 2. .

The recess 33 has a considerably larger area than the pin 4 so that the pin 4 can be engaged with sufficient play.

The lock case lid 5 is attached to the upper and lower guide walls 13.
It is fitted across 14.

This lid 5 is provided with a key insertion hole 51 at a position corresponding to the health insurance fitting part 31 of the rotating body 3.

This lock is attached to furniture, such as a wardrobe door 8, as shown in FIG.

Then, when the key 1 is engaged with the health insurance part 31 of the rotary body 3 through the lock hole 81 of the door 8 and the key insertion hole 51 of the lock case lid 5 and turned, the rotary body 3 rotates and the pin is turned. 4 in the bolt protruding direction, the tip 23 of the tied bolt 2
protrudes outside the lock case 1 and performs a locking function.

If the key 1 is turned in the opposite direction, the bolt tip 23 moves into the lock case 1 and the lock is unlocked due to the rotation of the rotating body 3 in the opposite direction to the locking state.

When using this lock, when the tied bolt 2 is extended and retracted, the protrusion 61 of the leaf spring 6 is engaged with the notches 26 and 27 of the tied bolt 2, so that the bolt 2 is brought to the position where the extension and retraction are completed. Since it is a holding structure, the only frictional resistance when the protrusion 61 escapes from the notch 26 or 27 is the largest resistance that is applied during locking and unlocking.

Therefore, the lock is much easier to operate than a conventional lock, as shown in FIG. 6, in which the spring force of the wire spring C acts entirely as resistance.

In particular, in the illustrated embodiment, the convex portion 61 of the leaf spring 6
Since the notches 26 and 27 are formed in a triangular shape, the resistance when the protrusion 61 escapes from the notches 26 and 27 is minimized compared to, for example, a case where these are made into an arc shape. Finish.

Moreover, since the pin 4 of the threaded bolt 2 is engaged with the recess 33 of the rotating body 3 with sufficient play, the rotating body 3
No extra restraining force is applied during the rotation of the rotating body 3, and the rotating body 3 is rotated with inertia within the range of this play.

Due to these points, the locking and unlocking operations of this lock are extremely light and smooth.

In addition, due to the engagement between the wire spring convex portion 61 and the notch portions 26 and 27, there is a clear response and sound (engagement sound) when locking and unlocking are completed.
This eliminates the risk of over-turning as with conventional locks.

Furthermore, since there is no possibility that the rotating body 3 and the pin 4 will come out of engagement, it is possible to prevent damage to parts due to this operation, and therefore, the reliability and durability of the operation can be improved.

In this embodiment, as shown in FIG. 3A, the center line l of the tip end portions 23 of the dead poles 1 and 2 is made to coincide with the center of rotation of the rotating body 3, that is, the center O of the health insurance section 31.

By doing this, when attaching the lock to the drawer door 8, by aligning the center of the dead pole I tip 23 facing the outside through the bolt entry/exit hole 17 of the lock case 1 with the center of the lock hole 81, the lock cannot be seen from the outside. The key insertion hole 51 of the case lid 5 and the rotation center O of the rotating body 3 automatically coincide with the center of the lock hole 81.

For this reason, the above-mentioned center alignment, which was extremely troublesome with conventional locks, can be easily and accurately performed.

Incidentally, the recess 33 of the rotating body 3 is not limited to the above-mentioned door shape, but only needs to have a width that allows the pin 4 to be engaged with a certain amount of play.

Furthermore, the engaging portion of the rotating body 3 is not limited to such a recessed portion, but may be formed in the shape of a through hole.

Further, in the above embodiment, the leaf spring 6 having the protrusion 61 was provided on the lock case 1 side, and the notches 26 and 27 were provided on the tied bolt 2 side, but conversely, the leaf spring 6 was provided on the bolt 2 side, and the notches 26 .27 may be provided on the lock case 1 side.

As described above, according to the present invention, there is no risk of failure, the operation is highly reliable, and the operation can be carried out easily and smoothly, making it extremely practical.

[Brief explanation of drawings]

Figures 1 to 5 show an embodiment of the present invention, Figure 1 is a perspective view, Figure 2 is a rear perspective view of the rotating body, Figure 3A is a front view with the bed bolt retracted, and the opening is An enlarged view showing details of the engaged state of the convex part of the wire spring and the notch in the same state, Fig. 4 A is a front view of the same bolt protruding state, the opening is a view corresponding to the opening in Fig. 3 in the same state, Fig. 5 6 is a perspective view showing a state of attachment to a wardrobe door, and FIG. 6 is a perspective view showing a conventional lock. 1...Lock case, 2...Tad bolt, 23...Tip of the bolt, 3...
・Rotating body, 4...Pin (protrusion), 33...
...Concave portion as an engaging portion of the rotating body, 6...Plate spring, 61...Convex portion of the same spring, 26.27...
...notch part.

Claims (1)

[Scope of utility model registration request] A dead bolt that can slide linearly so that its tip can move in and out of the lock case, and a rotating body that is rotated by a key are provided in the lock case, and the dead bolt has a protrusion and the rotating body has a protrusion. A leaf spring having a convex portion is provided on one side of the tied bolt and the inner wall of the lock case facing the bolt, and the other side is provided with an engaging portion that can be engaged with with sufficient play. 1. A lock characterized in that the lock is provided with a notch that engages with the protrusion when the lock is moved in and out.