JPH0544515B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a cover that is pivotally attached to a body housing a rotor, and that opens and closes the front surface of the rotor and engages with the body when rotated in the opening direction. This invention relates to an improvement in an automatic cover return device for a cylinder lock, in which the cover is held in place and returns to the closed position when the key is removed.

(Prior art) As such, for example,
There is one described in Publication No. 122354.

In this device, a cover that opens and closes the front of the rotor is pivotally attached to the body housing the rotor, and a spring that biases the cover from the open state to the closed state is installed between the body and the cover, and the cover is closed. The cover and body have locking parts that lock together to hold the cover in the open state when the cover is opened, and that are released when the cover is pushed up in a direction away from the body. A stopper having a key insertion hole and a guide pin is arranged at the front end of the rotor, the guide pin is made to protrude from the front end of the rotor, and when a key is inserted into the key insertion hole of the stopper, the guide pin moves. When the cover is pushed up and the lock is released, the guide pin engages with a guide groove formed in the cover and holds the cover against the rotational force applied to the cover.

However, with this model, the guide pin protrudes from the front end of the rotor, which has less space, so
Manufacturing precision is required, and since the guide pin is attached as the rotor rotates, grooves must be formed to prevent the cover from moving when the rotor rotates, making the structure of the cover more complex. In addition, it is extremely difficult to use the rotor in a device in which the rotor rotates in any direction from the key insertion/removal position.

(Object of the Invention) The present invention has been made to solve the above-mentioned problems, and has a simple structure that enables automatic return of the cover, and allows the rotor to rotate in either the left or right direction from the key insertion/removal position. To provide an automatic cover return device for a cylinder lock which can be used also for a movable cylinder lock.

(Structure of the Invention) For this reason, the present invention is designed to be pivotally attached to a cover that houses the rotor of a cylinder lock, and to always bias the cover in the closing direction for opening and closing the front face of the key insertion hole of the rotor, and also to bias the cover in the opening direction. In automatic cover return devices for cylinder locks, the key rotor engages with the body and holds the cover in the open position 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. A sliding member that responds to the insertion and removal of the key, sinks into the rotor when the key is removed, and moves to the outer peripheral surface of the rotor when the key is inserted, and a protrusion that abuts the sliding member at one end and protrudes from the front surface of the body at the other end. an engaging member formed on the front side of the body, an engaging member provided on the front face of the body, and the cover engages with the engaging member provided on the front side of the body when the cover is rotated in the opening direction. A first engaging part and a second engaging part that engages with the engaging member when the key is inserted are formed, and the engaging member is driven when the key is inserted so that the engaging part of the body and the first engaging part of the cover are connected to each other. The engagement with the engagement part is released, the second engagement part of the cover is engaged with the protrusion of the engagement member, and when the key is removed, the protrusion of the engagement member and the second engagement part of the cover are disengaged. It is designed to release the engagement with the

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

Reference numeral 1 denotes a cover, and a support shaft 3, a first engaging portion 4, and a second engaging portion 5 are protruded from a back surface 2 of the cover 1. The first engaging portion 4 includes a steep slope 4a, a gentle slope 4b, and a horizontal surface 4c. The tip of the support shaft 3 is tapered one step, and a projection 3a is formed in a part thereof, and a spring holder 6 is attached to this tip with a screw 8 with a washer 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. Therefore, the spring holder 6
is unrotatably fixed to the tip of the support shaft 3. Reference numeral 9 denotes a conical spring mounted between the spring holder 6 and a body 11 to be described later, one end of which is fixed to the spring holder 6, and the other end fixed to the body 11. The cover 1 is urged against the body 11 in a counterclockwise direction when viewed from the front side and in a back direction.
By attaching these parts, the cover 1 is pivotally attached to the body 11 so as to be movable in the front direction.
10 is a decoration panel placed on the front surface of the cover 1. The body 11 includes a shaft hole 12 for pivotally mounting the support shaft 3 of the cover 1, an engaging member storage recess 13,
A spring housing recess 14 and a rotor housing 15 are provided, and a stopper 16 is further formed.
The stopper 16 comes into contact with a 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;
can be rotated in either the left or right direction by inserting the key 18, and a lever 19 attached to the rear end of the rotor 17 is driven to unlock the back door (not shown). It's getting old.

A sliding member 20 is housed in the rotor 17 and has a roughly U-shape. When the key 18 is removed or removed, the sliding member 20 is inserted into the rotor 17, and when the key 18 is inserted into the rotor 17, one end 20a of the sliding member 20 becomes the front end of the rotor 17. The cylinder cap 21 is moved to a position on the outer peripheral surface of the cylinder cap 21 attached to the cylinder cap 21. The sliding member 20 has an inclined surface 20b formed thereon so that the stepped portion 18 of the key 18
a moves the sliding member 20 to the right while moving the inclined surface 20.
b, and then moves along step 18 of key 18.
a moves while slidingly contacting the other end 20c of the sliding member 20. At this position, one end 20 of the sliding member 20
a is the cylinder cap 2 attached to the rotor 17
It is set to coincide with the outer circumference of 1. 2
Reference numeral 2 denotes an engaging member, which is located in the engaging member storage recess 1 of the body 11.
One end of the shaft 13a is pivotally mounted on a shaft 13a projecting from the top of the shaft 13a.
3 is in contact with one end 20a of the sliding member 20, and an engagement protrusion 24 is formed at the other end, and the engagement protrusion 24 is provided with an inclined surface 24a. Furthermore, a spring receiving projection 25 is formed on the engaging member 22, and one end side of a coil spring 26 stored in the spring storage recess 14 of the body 11 comes into contact with the outer circumference of this projection 25, and the engaging member 22 is rotated clockwise. is energized. When the key 18 is removed, the biasing force of the coil spring 26 causes the one end 2 of the engaging member 22 to
3 is recessed into the rotor 17 together with the sliding member 20. At this time, the position of the engagement protrusion 24 of the engagement member 22 is on the trajectory that the first engagement part 4 of the cover 1 passes when the cover 1 is rotated about the support shaft 3, and the key 18 is inserted. coil spring 26
One end of the engaging member 22 is connected to the rotor 1 against the urging force of
When the engaging protrusion 24 is moved to the outer circumferential surface of the cylinder cap 21 attached to the cover 1, the position of the engaging protrusion 24 is off the trajectory of the first engaging part of the cover 1, but on the trajectory of the second engaging part of the cover 1. Move to.

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

In the state shown in FIG. 1, the key 18 is not inserted into the rotor 17, so one end 23 of the engaging member 22 is recessed into the rotor 17 by the coil spring 26, as shown in FIGS. 4 and 5. At this time, the engaging protrusion 24 is connected to the first engaging portion 4 of the cover 1 when the cover 1 is rotated about the support shaft 3.
Therefore, when the cover 1 is rotated clockwise from the state shown in FIG. When the rotation is stopped, the first engaging portion 4
is engaged with the engagement protrusion 24, and the cover 1 is held in the open position as shown in FIG. This effect is the first
1 to 13, when the cover 1 is first rotated clockwise, that is, when the cover 1 is moved in the direction of arrow A in FIG. Since the second engaging portion 5 is on the trajectory that the first engaging portion 4 passes, and the second engaging portion 5 is further back, the second engaging portion 5 passes through the inner side of the engaging protrusion 24 and connects to the first engaging portion 24. The slope 24a of the engagement protrusion 24 is connected to the gentle slope 4b of the engagement portion 4.
comes into contact. When the cover 1 is further moved in the direction of arrow A, the cover 1 is lifted to a position where the horizontal surface 4c of the first engaging portion 4 contacts the tip 24b of the engaging protrusion 24, and climbs over the engaging protrusion 24 as shown in FIG. Move to position. When the rotation of the cover 1 is stopped in this state, the cover 1 moves counterclockwise, that is, in the direction of arrow B, due to the action of the conical spring 9, and as shown in FIG. It is designed to stop at the position where it comes into contact with the steep slope 4a. The steeply sloped surface 4a is formed because it engages with the engaging protrusion 24 and holds the cover 1 in the open position, but when the cover 1 is manually rotated in the closing direction, this steeply sloped surface 4a is formed. Engaging protrusion 2 by 4a
4 and release the engagement, so that the cover 1 can also be closed manually.

With the cover 1 in the open position, move the key 18 to the rotor 17.
When the key 18 is inserted into the sliding member 20, the stepped portion 18a of the key 18 moves along the inclined surface 20b of the sliding member 20.
0 and move its one end 20a to the outer peripheral surface of the cylinder cap 21 attached to the rotor 17, as shown in FIGS. 6 and 7. When the engaging member 22 is rotated counterclockwise against the biasing force of the coil spring 26, the engaging protrusion 2
4 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. At this time, since the engaging protrusion 24 of the engaging member 22 is on a trajectory passing through the second engaging part 5 of the cover 1, it engages with the second engaging part 5 as shown in FIG. Hold the cover 1 in position as shown.

The slope 24a is formed on the engagement protrusion 24 so that the first engagement part 4 can easily get over the engagement protrusion 24. It is possible to narrow the distance between the first engaging part 4 and the second engaging part 5 without losing strength, and therefore the first engaging part 4 has a gentle slope. It is an inclined surface having the same angle as the surface 4b.

By inserting the key 18 into the rotor 17, the rotor 17 becomes rotatable, and when the rotor 17 is rotated clockwise, one end 23 of the engaging member 22 moves over the outer periphery of the cylinder cap 21, as shown in FIG. The engaging member 22 does not move but only slides. As the rotor 17 rotates, a lever 19 rotates to unlock the back door. Note that even if the rotor 17 is rotated counterclockwise, the lock of the back door is released, and in this case, the one end 23 of the engaging member 22 can be moved simply by sliding on the outer periphery of the cylinder cap 21. There's nothing to do.

When the back door is unlocked, that is, when the rotor 17 is returned to its original position and the key 18 is removed, the engaging member 22 rotates clockwise due to the biasing force of the coil spring 26, and one end 23 of the engaging member 22 slides. It is immersed into the rotor 17 together with the member 20. Then, the engagement protrusion 24 of the engagement member 22 separates from the second engagement part 5 of the cover 1, and the cover 1 contacts the stopper 16 of the body 11 with the contact part 2a formed on the back surface 2 of the cover 1. The cover 1 is rotated counterclockwise until it touches the rotor 17, and in this position the cover 1 completely covers the front surface of the rotor 17.

In addition, in this embodiment, the engagement protrusion 24 of the engagement member 22
is adapted to engage with both the first engaging portion 4 and the second engaging portion 5 of the cover 1, but the engaging protrusion that engages with the first engaging portion is separately provided on the body. It may be provided on the front surface, and in this case, by moving the engaging member that engages with the second engaging portion, the cover is pushed up toward the front side and the engagement between the first engaging portion and the engaging protrusion is released. Just do it.

(Effect of the invention) Since the engaging member does not respond to rotation of the rotor, the cover structure can be simplified because the cover only needs to have the first engaging part and the second engaging part. .
Furthermore, no matter which direction the rotor is rotated, one end of the engaging member simply slides on the outer periphery of the rotor. Therefore, the rotor is a cylinder lock that rotates in any direction from the key insertion/removal position. can also be used.

[Brief explanation of drawings]

Fig. 1 is a plan view of the cylinder lock of the present invention, Fig. 2 is a sectional view taken from Fig. 1, Fig. 3 is a bottom view of the cover, and Fig. 4 is a partial sectional view of Fig. 1 with the cover removed. , Figure 5 is a partial cross-sectional front view of the cylinder lock with the cover removed, Figure 6 is a diagram with the key inserted compared to Figure 4, and Figure 7 is a diagram with the key inserted compared to Figure 5. Figure 8 is a diagram showing the state in which the cover is opened and the engaging protrusion and the first engaging part are engaged, and Figure 9 is a diagram showing the state in which the key is inserted and the engaging protrusion is engaged with the second engaging part. Figure 10 is a diagram showing the rotor rotated relative to Figure 9, Figure 11 is a cross-sectional view of the main parts with the cover in the closed position, Figure 12 is the cover in its engaged state. 13th sectional view of main parts showing open state
The figure is a cross-sectional view of the main part showing a state in which the engaging protrusion and the first engaging part are engaged, and FIG. 14 is a cross-sectional view of the main part showing a state in which the engaging protrusion and the second engaging part are engaged. be. DESCRIPTION OF SYMBOLS 1... Cover, 4... First engaging part, 5... Second engaging part, 9... Conical spring, 11... Body,
17... Rotor, 20... Sliding member, 22... Engaging member, 24... Engaging protrusion.

Claims (1)

[Scope of Claims] 1. A cover that is pivotally connected to the body housing the rotor of the cylinder lock and that opens and closes the front surface of the key insertion hole of the rotor is always biased in the closing direction and rotated in the opening direction. In automatic cover return devices for cylinder locks, the cover is engaged with the body and held in the open position when the key is operated, and when the key is removed from the cylinder lock after key operation, the cover returns to the closed position. A sliding member that responds by sinking into the rotor when the key is removed and removed and moves to the outer peripheral surface of the rotor when the key is inserted; a mating member, an engaging part is provided on the front side of the body, and the cover has a first engaging part that engages with the engaging part provided on the front side of the body when the cover is rotated in the opening direction. a second engaging portion that engages with the engaging member when the key is inserted; and the engaging member is driven when the key is inserted to connect the engaging portion of the body with the first engaging portion of the cover. the second engaging part of the cover is engaged with the protruding part of the engaging member, and the protruding part of the engaging member and the second engaging part of the cover are engaged when the key is removed. An automatic cover return device for a cylinder lock, characterized in that the cover is released.