JPH0454278Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cover automatic return mechanism that automatically returns the cover of a cylinder lock to the closed position after the key plate is removed.

(Prior Art) Cylinder locks equipped with a cover in which the cover automatically returns to the closed position when the key plate is removed after key operation are already known.

(Problem that the invention aims to solve) However, in the conventional cover automatic return mechanism, the cover is always trying to move to the closed position, and when operating the key, the cover must be opened with one hand while the key plate is inserted with the other hand. However, there is a problem in that it cannot be operated with one hand.
Also, although there are some methods that have solved this problem,
In that case, the structure is complicated, and if the key plate is pulled out without key operation (rotation) after opening the cover and inserting the key plate into the rotor,
There is a problem that the cover does not return automatically.

This idea was created in view of the above problems.
The purpose of this is to create an automatic cover return mechanism for cylinder locks that can be operated with one hand and has a simple structure, and that allows the cover to return automatically even if the key plate is pulled out without any key operation after the key plate is inserted. be.

(Means for Solving the Problems) The present invention which solves the above-mentioned problems includes a pawl that engages with the locking step when the cover is rotated to the open position, and a pivoting end that pivots on the pawl. When the supported key plate is inserted into the rotor, it is pushed by the key plate and rotates, and as the engagement between the pawl and the cover is released, the claw portion moves toward the cover side and engages the lock step. It is characterized by comprising a rotating plate that engages to stop the cover at an intermediate open position, and a spring that biases the pawl toward the cover.

(Function) In the cover automatic return mechanism of the cylinder lock of the present invention, when the cover is opened, the pawl engages with the locking stepped portion of the cover and the cover is locked in the open position. Next, when the key plate is inserted into the rotor, the rotating plate retracts the pole and releases the lock.This time, the pawl of the rotating plate engages with the stepped part of the rotating plate, and the cover is in the intermediate open position. Stop. When a key is operated in this state and the key plate is removed, the rotating plate returns to its original position, and the cover is disengaged from the claw portion and returns from the intermediate open position to the closed position.

(Example) Hereinafter, an example of the present invention will be described using the drawings.

In FIGS. 1 to 4, reference numeral 1 denotes a rotor having a key hole 1a into which a key plate 10 is inserted, and is fitted into a rotor case 2. As shown in FIG. 3 is rotatably pivoted to the rotor case 2 and moved to the closed position (position shown in Figure 3) by a return spring (not shown).
The cover is always biased so as to return to the rotor case 2, and the pin 3a protruding toward the rotor case 2 is the center of rotation. Further, on the lower surface of the cover 3 in FIG. 1, a locking step 3b is provided. Incidentally, the back of this lock step 3b is an inclined surface. Reference numeral 4 denotes a pole that is guided so as to be slidable in the vertical direction in FIG. 1, and its tip is formed at an acute angle, and its hanging surface in FIG.
It is coming into contact with the The proximal end of the pole 4 is rotatably supported by a pin 9 on a rotating end 6a of a substantially Y-shaped rotating plate 6 that rotates around a pin 5. Among the other ends of the rotating plate 6, one end forms a claw portion 6b having the same shape as the tip of the pole 4, and the other end 6C is in contact with the slide piece 7. Slide piece 7
The front end protrudes into the insertion path of the key plate 10, that is, into the key hole 1a, and the upper surface of the front corner in FIG. It is designed to move backward by sliding contact with the plate 10 and rotate the rotating plate 6 counterclockwise in FIG. 1. When the slide piece 7 is in the retracted position, the claw portion 6b of the rotating plate 6 moves the cover 3 so that it can prevent the cover 3 from returning to the closed position.
It is located at a position where it comes into contact with the lock step 3b. 8 is a compression spring that urges the rotating plate 6 in the clockwise direction in FIG.
As a result, the pole 4 is also always urged upward in FIG. In FIGS. 1 and 2, the rotating end 6a of the rotating plate 6 can move relative to the pole 4 in the lateral direction in FIG.
The hole in the pole 4 into which the pin 9 is inserted is a horizontally elongated hole, but if this pivot portion is not provided with the lateral play shown in Figure 1, some lateral movement of the pole 4 will be allowed. It is necessary to guide Paul 4 so that the

Next, the operation of the above embodiment will be explained. First, the third
When the cover 3 is in the closed position as shown in the figure, the cover 3
in the counterclockwise direction in FIG.
Rotate until b passes over pole 4, and then remove cover 3.
When the cover 3 is released, the lock step 3b returns to the position where the pawl 4 comes into contact with the cover 3 and stops there. This is the open position of the cover 3 shown in FIGS. 1 and 4. When the key plate 10 is inserted into the key hole 1a in this state, the rotating plate 6 rotates counterclockwise and the pawl 4 is pulled down. Therefore, the engagement between the lock step 3b and the pawl 4 is released, and the cover 3 is moved toward the closed position by the return spring, but the claw 6b of the rotating plate 6 is not on its movement path. Since it protrudes, the lock step 3b stops at the position where it comes into contact with it. This is the intermediate open position shown in Figure 2, with cover 3
The position is such that it does not interfere with key operation. When the key plate 10 is pulled out after key operation, the slide piece 7 is pushed by the end 6c of the rotary plate 6 and advances into the key hole 1a of the rotor 1, and the rotary plate 6 also rotates, and its claw portion 6b also moves downward in FIG. Therefore, since there is nothing to prevent the cover 3 from moving, the cover 3 rotates to the closed position and stops there.

According to the above configuration, after opening the cover 3 and locking it in the open position with the hand holding the key plate 10, the key plate 10 can be inserted and key operations can be performed, so that one-handed operation is possible. Further, even if the key plate 10 is inserted into the rotor 1 and then pulled out without any key operation, the cover 3 automatically returns to its original position. Furthermore,
Regarding the structure, it is advantageous because it has a small number of parts.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications are possible. For example, the shape of the rotating plate 6 may be any shape as long as the above operation can be achieved.

(Effects of the invention) As explained above, according to the invention, there is an automatic cover return mechanism for a cylinder lock that can be operated with one hand and has a simple structure. It is possible to create a cover that automatically returns even if it is pulled out.

[Brief explanation of the drawing]

Fig. 1 is an enlarged cross-sectional view of a main part of one embodiment of the present invention, and a cross-sectional view taken along the - line in Fig. 4, which will be described later, and Fig. 2 is an enlarged cross-sectional view of a main part showing another operating state of the embodiment of Fig. 1. ,
3 is a plan view of the embodiment shown in FIG. 1 with the cover in the closed position, and FIG. 4 is a plan view of the embodiment shown in FIG. 1 with the cover in the open position. 1... Rotor, 1a... Key hole, 2... Rotor case, 3... Cover, 3b... Lock step,
4... Pole, 6... Rotating plate, 6a... Rotating end, 6b... Claw, 6c... End, 7... Slide piece, 8... Compression spring, 10... Key plate.

Claims (1)

[Scope of utility model registration request] A pawl that engages with the locking step when the cover is rotated to the open position, and a rotating end that is pivotally supported by the pawl and rotates by being pushed by the key plate when the key plate is inserted into the rotor. a rotating plate whose claw portion moves toward the cover side and engages with the locking step portion to stop the cover at an intermediate open position when the pawl and the cover are disengaged; and a spring for biasing the cylinder lock toward the cover side.