JPH0631481B2 - Cylinder lock cover automatic return device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention pivotally mounts on a body accommodating a rotor, and when a cover for opening and closing the front surface of the rotor is rotated in the opening direction, the cover engages with the body to open position. The present invention relates to an improvement of a cover automatic return device for a cylinder lock, which is held in a position where the cover is returned to the closed position when the key is removed.

(Prior Art) As such a thing, for example, Japanese Utility Model Laid-Open No. 59-12235.
There is one described in Japanese Patent No. 4 publication.

In this model, a cover that opens and closes the front surface of the rotor is pivotally attached to the body that houses the rotor, and a spring that biases rotational force in the direction from the open state to the closed state is attached to the cover between the body and the cover. When the cover is opened, the cover holds the cover in the open state and is unlocked when the cover is pushed up in the direction away from the body. The stoppers are formed at the respective positions and have a key insertion hole and a guide pin at the rotor front end, and the guide pin protrudes from the rotor front end.When the key is inserted into the stopper key insertion hole, the guide pin moves. When the cover is pushed up and the locking is released, the guide pin is engaged with the guide groove formed in the cover to hold the cover against the turning force urged by the cover.

However, in this type, the key is inserted into the key insertion hole of the stopper and the guide pin is moved to push up the cover to release the lock, so the key insertion force becomes very heavy and the operability is poor. I was told.

(Object of the Invention) The present invention has been made to solve the above-mentioned problems, and enables automatic return of the cover with a simple structure and can be operated without increasing the key insertion force. An object of the present invention is to provide an automatic cylinder cover return device.

Therefore, according to the present invention, the cover pivotally mounted on the body accommodating the rotor of the cylinder lock and normally urging the cover for opening and closing the front surface of the key insertion hole of the rotor in the closing direction and opening the cover in the opening direction. In the automatic lock cover returning device for a cylinder lock, the key is held in the open position by engaging with the body when the key is rotated, and the cover returns to the closed position when the key is removed from the cylinder lock after key operation. The cover is provided with an engaging member that moves to the first position when the key is removed and moves to the second position when the key is inserted, and the cover is rotated in the opening direction. When engaging the one end of the engaging member at the first position and sloping toward the second position direction and engaging the one end of the engaging member at the second position when the key is inserted The engaging part is formed and the engaging member is inserted by inserting the key into the rotor. The key is driven to release the engagement between the one end of the engaging portion and the first engaging portion of the cover to engage the second engaging portion of the cover with the one end of the engaging member, and the key is removed from the rotor. The disengagement disengages the one end of the engaging member from the second engaging portion of the cover.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in more detail with reference to FIGS. 1 to 14 of the accompanying drawings.

Reference numeral 1 denotes a cover, and a support shaft 3, a first engaging portion 4, and a second engaging portion 5 are provided on a rear surface 2 of the cover 1 so as to project therefrom. The first engaging portion 4 includes an engaging surface 4a, an inclined surface 4b, and a horizontal surface 4c. The tip of the support shaft 3 is made thinner, and a protrusion 3a is formed on a part of the tip. The spring holder 6 is attached to this tip.
Are attached by screws 8 with washers 7 in between.
The spring holder 6 is formed with a notch (not shown) that fits into the protrusion 3a formed at the tip of the support shaft 3, and accordingly, the spring holder 6 cannot rotate at the tip of the support shaft 3. Fixed to. Reference numeral 9 denotes a conical spring mounted between the spring holder 6 and a body 11 described later, one end of which is fixed to the spring holder 6 and the other end of which is fixed to the body 11. The cover 1 is biased toward the body 11 in the counterclockwise direction and the rearward direction when viewed from the front side. The cover 1 is pivotally attached to the body 11 so as to be movable in the front direction by attaching these components. Reference numeral 10 is a decoration spring placed on the front surface of the cover 1. The body 11 has a shaft hole 12 into which the support shaft 3 of the cover 1 is pivotally mounted, and an engaging member storage recess 1
3, a spring accommodating concave portion 14, a rotor accommodating portion 15 are provided, and a stopper 16 is further formed. The stopper 16 contacts the contact portion 2a formed on the back surface 2 of the cover 1 to hold the cover 1 in the closed position. 17
Is a rotor, and the rotor 17 can be rotated in any of right and left directions by inserting a key 18, and a lever 19 attached to an end portion on the rear surface side of the rotor 17 is driven to lock the back door (see FIG. (Not shown). Reference numeral 20 denotes a sliding member housed in the rotor 17 and formed in a generally U-shape. When the key 18 is pulled out, the sliding member 20 is inserted into the rotor 17 and the key 18 is inserted into the rotor 17.
a is moved to the position of the outer peripheral surface of the cylinder cap 21 attached to the front end of the rotor 17. The sliding member 20 is formed with an inclined surface 20b, and the key 18
The stepped portion 18a of the key 18 moves along the inclined surface 20b while moving the sliding member 20 to the right, and then the stepped portion 18a of the key 18 is moved.
Moves while slidingly contacting the other end 20c of the sliding member 20. At this position, one end 20a of the sliding member 20 is attached to the rotor 17
It is set so as to coincide with the outer circumference of the cylinder cap 21 attached to the. Reference numeral 22 is an engaging member, which is pivotally attached to a shaft 13a protruding from the engaging member housing recess 13 of the body 11 and has an engaging protrusion 24 formed at one end thereof.
4 is provided with an inclined surface 24a, and the other end 23 has a sliding member 2
It is in contact with one end portion 20a of 0. Further, the engaging member 22
A spring receiving protrusion 25 is formed on the outer peripheral portion of the protrusion 25, and the other end of the coil spring 26 accommodated in the spring accommodating recess 14 of the body 11 contacts the engaging member 22.
Is urged clockwise. When the key 18 is pulled out, the engaging member 2 is urged by the urging force of the coil spring 26.
One end 23 of 2 is immersed in the rotor 17 together with the sliding member 20. At this time, the engagement protrusion 24 formed at one end of the engagement member 22 is located on the locus of the first engagement portion 4 of the cover 1 when the cover 1 is rotated about the support shaft 3 as a rotation center. The key 18 is inserted and the other end of the engaging member 22 is inserted into the rotor 17 against the biasing force of the coil spring 26.
The position of the engagement protrusion 24 when it is moved to the outer peripheral surface of the cylinder cap 21 mounted on is deviated from the trajectory of the first engaging portion of the cover 1 and the trajectory of the second engaging portion. Move to a second position.

Next, the operation of the present invention will be described.

In the state shown in FIG. 1, since the key 18 is not inserted in the rotor 17, the engaging member 22 is retracted by the coil spring 26 and the other end 23 is retracted in the rotor 17 as shown in FIGS. 4 and 5. At this time, the engagement projection 24 is at the first position on the locus through which the first engagement portion 4 of the cover 1 passes when the cover 1 is rotated about the support shaft 3 as a rotation center, and accordingly, the first protrusion When the cover 1 is rotated clockwise from the state shown in the figure, the first engaging portion 4 of the cover 1 rides over the engaging protrusion 24, and when the cover 1 is stopped at this position to be in a free state, The engaging portion 4 of No. 1 engages with the engaging protrusion 24, and the cover 1 is held in the open position as shown in FIG. At this time, the engagement surface 4 a of the first engagement portion 4 is inclined in the second position direction of the engagement protrusion 24 formed at one end of the engagement member 22. That is, the force in the returning direction of the cover 1 acts to move the engagement protrusion 24 from the first position to the second position, but the friction between the engagement protrusion 24 and the inclined surface 4a and the load of the coil spring 26. The engaging projection 24 is
Held in position. This operation is shown in FIGS.
Explaining with reference to the drawing, first, when the cover 1 is rotated clockwise, that is, when the cover 1 is moved in the direction of arrow A in FIG. 11, the engagement protrusion 24 of the engagement member 22 causes the engagement protrusion 24 to move to the first engagement portion. 4 is on the locus through which the second engaging portion 5 is located in the direction deeper than that, the second engaging portion 5 passes through the inner side of the engaging protrusion 24, and the first engaging portion 4 Inclined surface 4b
The inclined surface 24a of the engaging projection 24 abuts against. When the cover 1 is further moved in the direction of the arrow A, the cover 1 engages with the engaging projection 2
4 is lifted up to a position where the horizontal surface 4c of the first engaging portion 4 comes into contact with the tip end 24b of the No. 4 and goes over the engaging projection 24 and
Move to the position shown in the figure. When the rotation of the cover 1 is stopped in this state, the cover 1 is moved in the counterclockwise direction, that is, the direction of the arrow B by the action of the conical spring 9, and the engaging protrusion 24 causes the first engaging portion 4 to move as shown in FIG. It stops at the position where it abuts on the engaging surface 4a. Since the engagement surface 4a is formed so as to be inclined in the second position direction, the cover 1 is held in the open position by engaging with the engagement protrusion 24, but the cover 1 is manually rotated in the closing direction. Then, the engagement surface 4a moves the engagement protrusion 24 in the second position direction to release the engagement, and the cover 1 can be manually closed.

When the key 18 is inserted into the rotor 17 with the cover 1 opened, the step portion 18 a of the key 18 causes the slanted surface 2 of the sliding member 20 to move.
0b, the sliding member 20 is pushed up and its one end 20a is moved to the outer peripheral surface of the cylinder cap 21 mounted on the rotor 17, as shown in FIGS. When the engaging member 22 is rotated counterclockwise against the biasing force of the coil spring 26, the engaging protrusion 24
Is disengaged from the first engaging portion 4 of the cover 1, and the cover 1 is rotated counterclockwise by the biasing force of the conical spring 9. The engagement surface 4a of the first engagement portion 4 is inclined in the second position direction,
The return force of the cover 1 causes the engagement protrusion 24 of the engagement member 22 to move to the second position.
The force for rotating the engaging member 22 in the counterclockwise direction is very light, and therefore the load for inserting the key 18 into the rotor 17 is very light. At this time, since the engagement protrusion 24 of the engagement member 22 is on the locus of the second engagement portion 5 of the cover 1, as shown in FIG.
To hold the cover 1 in its position as shown in FIG.

In addition, the reason why the inclined surface 24a is formed on the engaging protrusion 24 is to allow the first engaging portion 4 to easily get over the engaging protrusion 24, and the engaging protrusion 24 is The first engaging portion 4 and the second engaging portion 5 without impairing the strength.
The distance between and can be narrowed, and accordingly, the inclined surface has the same angle as the inclined surface 4b of the first engaging portion 4.

By inserting the key 18 into the rotor 17,
Is rotatable, and when the rotor 17 is rotated clockwise, one end 23 of the engaging member 22 simply slides on the outer circumference of the cylinder cap 21 and the engaging member 22 moves as shown in FIG. There is nothing to do. The lever 19 is rotated in response to the rotation of the rotor 17, and the lock of the back door is released. Incidentally, even if the rotor 17 is rotated counterclockwise, the locking of the back door is released, and in this case also, the other end 23 of the engaging member 22 simply slides on the outer circumference of the cylinder cap 21. It never moves.

When the lock of the back door is released, that is, the rotor 17 is returned to the original position and the key 18 is removed, the engaging member 22
Is rotated clockwise by the urging force of the coil spring 26, and one end 23 thereof is retracted into the row 17 together with the sliding member 20. Then, the engagement protrusion 24 of the engagement member 22 has the cover 1
The cover 1 is disengaged from the second engaging portion 5 of the cover 11, and the cover 1 is attached to the stopper 16 of the body 11 on the rear surface 2 of the cover 1.
It rotates counterclockwise until a comes into contact with it, and the cover 1 completely covers the front surface of the rotor 17 at this position.

In addition, the second engaging portion 5 includes an engaging surface 4 a of the first engaging portion 4.
On the contrary, since the engaging surface 5a inclined in the first position direction is formed, the engagement is released with a very light force, and the cover 1 is reliably returned.

According to this embodiment, the engaging member 22 does not respond to the rotation of the rotor 17, so that the cover 1 may be simply formed with the first engaging portion 4 and the second engaging portion 5. The structure of can be simplified. The other end 23 of the engaging member 22 only slides on the outer circumference of the rotor 17 regardless of which direction the rotor 17 is rotated. Therefore, the rotor 17 moves in any direction from the key 18 insertion / removal position. It is possible to use even a cylinder lock having a structure that can be rotated also.

(Effect of the Invention) As described above, according to the present invention, one end of the engaging member is the second
Since the action acts in the direction of moving to the position of, the load for inserting the key and moving one end of the engaging member to the second position is very light, and accordingly, the load for inserting the key is also light,
The operation feeling is very good.

[Brief description of drawings]

1 is a plan view of a cylinder lock of the present invention, FIG. 2 is a sectional view taken along the line I--I of FIG. 1, FIG. 3 is a bottom view of a cover, and FIG. 4 is a part of the cover shown in FIG. Sectional view, FIG. 5 is a partial sectional front view with the cylinder lock cover removed, FIG. 6 is a view showing a state in which a key is inserted to FIG. 4, and FIG.
FIG. 8 is a view showing a state in which a key is inserted, FIG. 8 is a view showing a state in which the cover is opened and the engaging protrusion is engaged with the first engaging portion, and FIG. The figure which shows the state which the engagement protrusion and the 2nd engaging part engaged, FIG. 10 is the figure which rotated the rotor with respect to FIG. 9, and FIG. 11 is the principal part in the position where the cover was closed. Sectional view, FIG. 12 is a sectional view of an essential part showing a state in which a cover is opened, FIG. 13 is a sectional view of an essential part showing a state in which an engaging protrusion and a first engaging part are engaged, and FIG. It is a principal part sectional view which shows the state which the engagement protrusion and the 2nd engaging part engaged. 1 ... Cover, 4 ... First engaging portion, 5 ... Second engaging portion, 9 ... Conical spring, 11 ... Body, 17 ... Rotor, 20 ... Sliding member, 22 ...... Engagement member, 24 ...... Engagement protrusion.

Claims (1)

[Claims] 1. A cover, which is pivotally attached to a body accommodating a rotor of a cylinder lock and which opens and closes a front surface of a key insertion hole of the rotor, always biases the cover in a closing direction and rotates the cover in the opening direction. In the cover automatic return device of the cylinder lock, which engages with and holds in the open position, and the key returns to the closed position when the key is removed from the cylinder lock after key operation, in response to the key being inserted into or removed from the rotor. One end of the cover is provided with an engaging member that moves to the first position when the key is removed and moves to the second position when the key is inserted. The cover is engaged at the first position when the cover is rotated in the opening direction. A first engaging portion that engages with one end of the coupling member and is inclined in the second position direction, and a second engaging portion that engages with one end of the engaging member at the second position when the key is inserted are formed. , One end of the engaging member by driving the engaging member by inserting the key into the rotor And the first engaging portion of the cover are disengaged to engage one end of the engaging member with the second engaging portion of the cover, and the key is pulled out from the rotor so that one end of the engaging member is released. An automatic cover returning device for a cylinder lock, characterized in that the engagement with the second engaging portion of the cover is released.