JPH057385Y2 - - 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 problems is capable of moving in a direction that intersects the rotation locus of the cover protrusion and approaches the center of rotation of the cover as it advances in the opening direction of the cover. A slide cam is disposed in which a slit for passing the cover protrusion is formed in a direction crossing the movement direction, and when the key plate is inserted into the rotor, the slide cam moves to an intermediate position on the rotation center side of the cover. The slide cam is biased by a spring to move away from the center of rotation of the cover, and when the cover is moved from the closed position to the open position, the slide cam touches the cover protrusion. During the pushing process, the cover protrusion passes through the slit portion, and when the key plate is inserted into the rotor, the cover protrusion engages with the slit during cover movement from the open position to the closed position. The present invention is characterized in that the cover protrusion passes through the slit portion during the movement process of the slide cam that occurs when the key plate is removed.

(Function) In the cover automatic return mechanism of the cylinder lock of the present invention, when the cover is opened, the cover protrusion pushes the slide cam and passes through the slit portion during this pushing process. After this passage, the slide cam returns to its initial position by the force of the spring, so the return path of the cover protrusion is closed, and the cover is locked in the open position even if the cover is released. Next, when the key plate is inserted into the rotor, the slide cam moves to the intermediate position, the cover protrusion engages with the slit, and the cover moves to the intermediate open position. When a key is operated in this state and the key plate is removed, the slide cam returns to its initial position and the cover protrusion passes through the slit portion during this movement process. Therefore, the cover is released from the restriction by the slide cam 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 1) by a return spring (not shown).
The cover is always biased to return to the rotor case 2 side, and the pin 3a and cover projection 3b
is provided protrudingly, and the pin 3a serves as the center of rotation of the cover 3. Reference numeral 4 denotes a slide cam that is movable in a direction that intersects the rotation locus T of the cover protrusion 3b and approaches the rotation center of the cover 3 as it advances in the opening direction of the cover 3 (counterclockwise in FIG. 1). Here, the rotor case 2 is guided by a long groove 2a bored in the vertical direction in FIG. 1, and moves in the vertical direction. This slide cam 4 has a slit 4a in a direction crossing the movement direction of the cam projections 4b, 4.
It is formed between c. The cam protrusions 4b and 4c are located on the rotation center side and opposite the rotation center side of the cover 3, respectively, with respect to the rotation locus T of the cover protrusion 3b, and in the state shown in FIG. A portion of the cam protrusion 4c protrudes within T, and the cam protrusion 4c is outside the rotation locus T. Further, the end portion 4d of the slide cam 4 is in contact with the rear surface of the slide piece 5.
The slide piece 5 has a key plate 10 at its front end.
The upper surface of the front corner is tapered as shown in FIG. 4, and when the key plate 10 is inserted into the key hole 1a, the tapered surface 5a and the key plate 10 are The compression spring 6 moves backward due to sliding contact.
Therefore, the slide cam 4, which is always urged upward in FIG. 1, is moved to a lower intermediate position (toward the center of rotation of the cover 3). When the slide cam 4 is in the intermediate position, the cam protrusion 4b is outside the rotation locus T of the cover protrusion 3b, and the cam protrusion 4c is within the rotation locus T, as shown in FIG. Therefore, the cover protrusion 3b is in contact with the cam protrusion 4c and engaged with the slit 4a.

Next, the operation of the above embodiment will be explained. First, the first
When the cover 3 is in the closed position as shown in the figure, the cover 3
When rotated counterclockwise in Figure 1,
The cover protrusion 3b is the cam protrusion 4b of the slide cam 4
comes into contact with. After this contact, when the cover 3 is further rotated, the slide cam 4 is pushed downward, and the cover protrusion 3b moves within the slit 4a while slidingly contacting the cam protrusion 4b. After that, cover protrusion 3b
Since the slide cam 4 comes into contact with the left side surface of the cam projection 4b in FIG. 1, the slide cam 4 is returned to its initial position by the biasing force of the compression spring 6. After shifting to this state, when the cover 3 is released, the cover 3 stops with the cover protrusion 3b in contact with the side surface of the cam protrusion 4b as shown in FIG.
This is the state in which the return path of the cover protrusion 3b is closed, that is, the cover 3 is in the open position.

When the key plate 10 is inserted into the key hole 1a in this state, the slide piece 5 is moved backward, and the slide cam 4 is pulled downward in FIG. 2 and moved to an intermediate position. Therefore, the engagement between the cover protrusion 3b and the cam protrusion 4b is released, and the cover 3 is rotated in the direction of the closed position by the aforementioned return spring, but since the cam protrusion 4c protrudes into the rotation locus T, The rotation of the cover 3 stops at the position where the cover protrusion 3b comes into contact with it. This is the intermediate open position shown in FIG. 3, where the cover 3 does not interfere with key operations. When the key plate 10 is pulled out after key operation, the slide cam 4 moves to the initial position. Therefore, the cam protrusion 4c moves outside the rotation trajectory T. During the movement process of the slide cam 4 from the intermediate position to the initial position, the cover protrusion 3b is inserted into the slit 4.
Since the cover 3 passes through the inside a, the cover 3 rotates to the closed position and stops there. That is, it returns to the closed position shown in FIG.

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, although the slide piece 5 is projected into the keyhole 1a from the left side in FIG. 1, it may be projected from the right side, or from above or below. In addition, the key plate 10 can be placed in multiple positions (angles).
In a cylinder lock that can be pulled out at each position, the above effect can be obtained at each position by providing a slide piece 5 that comes into contact with the end 4d of the slide cam 4 at each position, that is, by incorporating a plurality of slide pieces 5 into the rotor 1. I can do it.

(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 drawings]

FIG. 1 is a plan view of an embodiment of the present invention in the cover closed position, FIG. 2 is a plan view showing the embodiment of FIG. 1 in the cover open position, and FIG. 3 is the embodiment of the invention shown in FIG. FIG. 4 is a sectional view taken along the line -- in FIG. 1. 1... Rotor, 1a... Key hole, 2... Rotor case, 2a... Long groove, 3... Cover, 3b...
Cover protrusion, 4...Slide cam, 4a...Slit, 4b, 4c...Cam protrusion, 4d...End part,
5...Slide piece, 6...Compression spring, 10...Key plate, T...Rotation locus.

Claims (1)

[Scope of utility model registration request] The cover protrusion is movable in a direction that intersects with the rotation locus of the cover protrusion and approaches the center of rotation of the cover as it advances in the cover opening direction, and a slit for passing the cover protrusion is formed in a direction that intersects with the moving direction. The slide cam is arranged such that when the key plate is inserted into the rotor, the slide cam moves to an intermediate position on the side of the rotation center of the cover, and the slide cam is moved from the rotation center of the cover to an intermediate position. When the cover is moved away from the closed position to the open position, the slide cam is pushed by the cover protrusion, and during this pushing process, the cover protrusion passes through the slit portion and is opened. When the cover is moved from the position to the closed position, when the key plate is inserted into the rotor, the cover protrusion engages with the slit, and when the key plate is removed, the cover protrusion engages with the slit during the movement of the slide cam. An automatic cylinder lock cover return mechanism configured such that the cover passes through the slit portion.