JPH0454277Y2 - - 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 to solve the above problems has a bending part and is movable towards the cover side, and when the cover is rotated to the open position, the lock step part It has an engaging pawl and a cam part that engages with the bent part of the pawl, and when the key plate is inserted into the rotor, it is pushed by the key plate and rotates, and the cam part moves the pawl to the opposite side of the cover. a rotating plate that is pulled in to disengage the pawl and the cover, and a pawl portion moves toward the cover side and engages the locking step portion to stop the cover at an intermediate open position; A first spring for biasing the pole toward the cover side, and a second spring biasing the Kaido plate in a direction to release the retraction of the pole by the rotating plate. It is.

(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.Then, the pawl of the rotating plate engages with the stepped part of the rotating plate, and the cover moves to 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, so that 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 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 slidably guided in the vertical direction of FIG. 1, and its rotation is restricted by means not shown. The tip of the pawl 4 is formed at an acute angle so that the hanging surface in FIG. 1 comes into contact with the lock step 3b. Also, Paul 4
A bent portion 4a is formed at the base end of the bending portion 4a, and a cam portion 6a of a substantially L-shaped rotating plate 6 that rotates around a pin 5 is in contact with the bent portion 4a. The cam surface of this cam portion 6a is formed in such a shape that when the rotating plate 6 rotates clockwise in FIG. 1, the pawl 4 is pulled in toward the side opposite to the cover. Further, the rotating plate 6 has a claw portion 6b having the same shape as the tip of the pole 4 at its tip, and a convex end portion 6c that abuts the slide piece 7 at its intermediate portion. The slide piece 7 has its front end protruding into the insertion path of the key plate 10, that is, the key hole 1a, and the upper surface of the front corner in FIG.
When inserted into the key hole 1a, the key plate 10 slides into sliding contact with the tapered surface of the key plate 10, causing the rotating plate 6 to rotate clockwise in FIG. 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 constantly urges the pole 4 upward in FIG. 1; 9 is a rotation plate 6;
This is a compression spring that urges the motor in the counterclockwise direction in FIG.

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 clockwise 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 aforementioned 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. Also, key plate 1
Even if the cover 3 is pulled out without any key operation after being inserted into the rotor 1, the cover 3 automatically returns. Furthermore, the structure 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, there is no physical reason why two compression springs 8 and 9 need to be present, and as shown in FIG. The provided compression springs may be used as the first and second compression springs.

(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 a sectional view of a main part of an embodiment of the present invention, and is a sectional view taken along the line - - in Fig. 4, which will be described later, Fig. 2 is a sectional view showing another operating state of the embodiment of Fig. 1, and Fig. 3. is the first
FIG. 4 is a plan view of the embodiment shown in the figure with the cover in the closed position, FIG. 4 is a plan view of the same with the cover in the open position, and FIG. 5 is a diagram showing the main part of another embodiment of the present invention. 1... Rotor, 1a... Key hole, 2... Rotor case, 3... Cover, 3b... Lock step,
4...Pole, 4a...Bending part, 6...Rotating plate, 6a...Cam part, 6b...Claw part, 6c...
End portion, 7... Slide piece, 8, 9, 11...
Compression spring, 10...key plate.

Claims (1)

[Scope of utility model registration request] It has a pawl that has a bent part and is movable toward the cover and that engages with the locking step when the cover is rotated to the open position, and a cam part that engages with the bent part of the pawl. When the key plate is inserted into the rotor, it is pushed by the key plate and rotates, and the cam portion pulls the pole toward the opposite side of the cover to release the engagement between the pawl and the cover, and the claw portion pushes against the cover. a rotating plate that moves to the side and engages the locking step to stop the cover in an intermediate open position; a first spring that biases the pawl toward the cover; and the rotating plate. and a second spring that biases the rotating plate in a direction to release the retraction of the pawl.