JPH0336678Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cylinder lock with a cover used, for example, in the trunk of an automobile.

A cylinder lock for the trunk of a car is equipped with a cover that opens and closes the front of the rotor, and locking parts are provided on both the cover and the lock body to hold the cover in the open state. There is one in which a spring applies rotational force in the direction, and the cover is normally kept in a closed state.

By the way, in this type of conventional cylinder lock with a cover, a locking part is provided to keep the cover open during key operations, but if the lock is not released after the key operation, the cover will close. does not return automatically, and I sometimes forget to close the cover. In order to eliminate this inconvenience, the applicant has proposed that once the cover is opened, the open state of the cover is automatically maintained while the key is inserted into the rotor and rotated to unlock, while the cover is automatically maintained in the open state while the key is rotated to close. Provided a key cylinder lock with a cover that automatically closes when the rear key is removed from the rotor.
-45575 (Refer to Utility Model Application Publication No. 157657/1987)). However, according to this proposal, there was a problem in that the cover began to automatically return to its original position as soon as the key was turned to unlock, and the cover continued to be in contact with the key until the key was removed.

The present invention was developed by focusing on these problems, and while the key is inserted into the stopper located at the front end of the rotor after performing the unlocking operation, the guide pin of the stopper is covered. A cylinder lock with a cover that engages with a guide groove to hold the cover against the biasing force in the closing direction, and when the key is removed, the engagement is released and the cover returns to the closed state. This is what we provide. For more information,
A cover for opening and closing the front of the rotor is rotatably attached to the body housing the rotor, and a spring is attached between the body and the cover to apply rotational force from the open state to the closed state, and When the cover is opened, the cover locks with each other to hold the cover in the open position, while the cover and body have locking parts that are released when the cover is pushed up in the direction away from the body. In a cylinder lock with a cover formed at corresponding positions, a stopper having a key insertion hole and a guide pin is connected between the cover and the front end of the rotor through a shaft pin to the front end of the rotor within a certain angle range. A guide groove is formed on the back surface of the cover into which the guide pin of the stopper fits, and an opening path is formed in the guide groove along an arc centered on the rotation fulcrum of the cover. an unlocking passage continuous to one end of the opening passage and formed along an arc centered on the position of the rotor in the open state of the cover; and an unlocking passage concentrically adjacent to the unlocking passage. When the cover is closed, the guide pin is located at the tip of the opening passage, and when the cover is opened, it moves through the opening passage and is placed at the other end for unlocking. The guide pin moves to a point continuous with the passage and aligns the key insertion hole of the stopper with the rotor key hole to enable insertion of the key, and the unlocking action of the key moves the stopper and the guide pin moves through the unlocking passage. After the cover is moved, the cover is biased by the spring and moves the guide pin toward the retaining passage, and the guide pin abuts against the wall of the retaining passage, so that the cover is biased by the spring and moves in the closing direction. It is characterized by a structure that prevents it from rotating.

Hereinafter, the present invention will be specifically explained with reference to the illustrated embodiments. This embodiment is a cover that is used in the trunk of a car and has an automatic return mechanism that allows the cover to close automatically when the cover is opened, a key is operated, the key is turned to unlock, and then the key is removed from the rotor. This invention is applied to a cylinder lock with a lock.

As shown in FIG. 1, a pad 2 is installed on a car body 1 in the trunk area of a car, and a rotor 3
The cylindrical part 4a of the body 4 that houses the cylindrical part 4 is inserted into each mounting hole of the pad 2 and the vehicle body 1, and a flange part 4b that protrudes around the outside of the cylindrical part 4a is arranged on the surface of the pad 2. A cover 5 is provided on the surface of the portion 4b.

The cover 5 has a cylindrical projection 6 on its back surface, and this projection 6 is inserted into a hole 4c provided at a predetermined position in the flange 4b of the body 4 so as to be rotatable and tiltable within a certain range. The front surface of the rotor 3 can be opened and closed by rotating around the rotor 6 as a fulcrum. A coil spring 7 is fitted to the outer periphery of the protrusion 6, and a spring cover 8 is fixed to the end. One end of the spring 7 is fixed to the spring cover 8, while the other end is fixed to the flange 4b. When opened, the spring 7 applies a rotational force in the direction of closing the cover 5 and a tensile force in the direction of bringing the cover 5 into close contact with the flange 4b of the body 4.

A rotor cover 15 is attached to the front surface of the rotor 3, housing a stopper 11. The stopper 11 is a substantially triangular plate-shaped plate as shown in FIG. A pin 13 and a guide pin 14 are provided protruding from the surface. A stopper 11 is provided on the front surface of the rotor 3 as shown in FIG.
A recess 3a is formed in which the stopper 11 is accommodated, and with the shaft pin 13 inserted into the shaft hole 3b provided in the recess 3a, the stopper 11 is stored in the recess 3a, and rotates about 20 degrees with the shaft pin 13 as a fulcrum as shown by the chain line. It is possible to rotate within the range of . At this time, the guide pin 14 moves in a direction intersecting an arc of an opening passage 19 of the cover 5, which will be described later. In addition, the guide pin 14 of the stopper 11
protrudes to the front from a hole provided in the rotor cover 15.

On the other hand, the back surface of the cover 5 is provided with a guide groove 17 into which the guide pin 14 of the stopper 11 is fitted, as shown in FIG. This guide groove 17 is formed by providing a protrusion 18 surrounding it, and the guide groove 17 is formed by an opening passage 19 formed in the left-right direction along an arc centered on the protrusion 6.
and an unlocking passage 20 that is continuous from the opening passage 19 and is formed vertically along an arc centered on the position of the rotor 3 when the cover 5 is in the open state.
and a holding passage 21 formed concentrically adjacent to the unlocking passage 20. As shown in FIG. 4d, the unlocking passage 20 is continuously formed with an introduction part 20a, a slope 20b, and a shallow bottom part 20c having the same depth as the opening passage 19.
As shown in FIG. 4e, the shallow bottom portion 20c is deeper than the shallow bottom portion 20c via the slope 21a, and shallower than the opening passage 19 and the introduction portion 20a. Further, on the back side of the cover 5, a protrusion 6 is provided.
A protrusion 22 is formed along an arc centered at , and as shown in Fig. 4c, the edge of the protrusion 22 is
The locking portion 23 is cut at an angle of 60°.

Further, a protrusion 25 is formed on an arc centered on the hole 4c of the flange 4b of the body 4, and the lower end thereof is cut at an angle of 60° to form a locking portion 26 corresponding to the locking portion 23 described above. ing.

The present embodiment has the structure as described above, and the opening/closing operation of the cover 5 will be explained next.

First, when the cover 5 is in the closed position covering the front surface of the rotor 3 as shown in FIG. 1, the guide pin 14 of the stopper 11 is fitted into the opening passage 19 of the cover 5 at point A.

Next, as shown in FIG. 6, when the cover 5 is rotated clockwise against the force of the spring 7 to open the cover 5, the opening passage 19 moves along the guide pin 14 and is opened. Introduction section 2 of lock passage 20
The stopper 11 rotates a little and the keyhole 12 of the stopper 11 reaches the point B near the entrance of the rotor 3.
The key 27 can be inserted in accordance with c. Further, as the cover 5 is opened, the protrusion 25 of the body 4 moves relatively while sliding on the slope 22a of the protrusion 22 of the cover 5, and as shown in FIG. , 26 are engaged with each other, and the cover 5 is held in this open state against the rotational force exerted by the spring 7. Here, the locking portions 23, 2
6 are each formed at an angle of 60°, so
When a rotational force in the closing direction is applied to the cover 5 from this state, the locking parts 23 and 26 slip against the tensile force biased by the spring 7, and the cover 5 is pushed up. Therefore, by rotating the cover 5 in the closing direction, the locking between the locking parts 23 and 26 can be released, and once the cover 5 is opened to the open state, the cover 5 can be opened again without using the key. can be closed.

Next, when the key 27 is inserted and rotated clockwise to perform an unlocking operation, the stopper 11 also rotates and the guide pin 14 moves inside the unlocking passage 20 from the introduction part 20a to the slope 20b to the shallow bottom part 20c. The cover 5 is pushed up when it hits the bottom of the shallow bottom portion 20c, and the locking of the locking portions 23 and 26 is released. Since the cover 5 is biased by the turning force in the closing direction by the spring 7, the cover 5 rotates slightly in the closing direction, and the guide pin 14 moves from the shallow bottom part 20c to the slope 21.
It reaches point C of the holding passage 21 via point a. In this position, the locking by the locking parts 23 and 26 is released, but since the key is in contact with the key hole 12 of the stopper 11, the stopper 11 is prevented from rotating, and therefore the cover 5 is also held by the guide pin. 14 is prevented from rotating by coming into contact with the holding passage wall 21b,
The cover 5 is kept open in this position. Since the guide pin 14 can move within the holding passage 21, the key 27 can also be rotated within this range, and the necessary unlocking operation can be performed.

When the key 27 is rotated counterclockwise after unlocking, the guide pin 14 moves to point C' in the holding passage 21. In this position, the rotation of the stopper 11 is prevented by the key, so the guide pin 14 cannot move into the opening passage 19, so that the cover 5 is maintained in the open state. When key 27 is removed, stopper 1
1 is released from contact with the keyhole 12, and the stopper 11 is released.
is rotated counterclockwise in FIG.
The cover 5 automatically returns to the closed state. At this time, the guide pin 14 returns to point A of the opening passage 19 of the cover 5. Therefore, the relative movement between the cover and the guide pin can be summarized as follows in FIG.

When the cover 5 is manually opened from A to B' to B, the locking portions 23 and 26 are engaged.

At B'→B, the guide pin 14 is in the guide groove 17.
The stopper 11 also rotates, and the keyhole 12 of the stopper 11 and the keyhole 3c of the rotor 3 coincide with each other.

For B→C→C', the key 27 is used to perform an unlocking operation.

From B to C, turn the key 27 all the way in the unlocking direction. The guide pin 14 is connected to the slope 2 of the unlocking passage 20
When passing through 0b, the locking parts 23 and 26 are disengaged, and the guide pin 14 moves to the holding passage 21.

C→C', when the key 27 is released, the guide pin 14 returns together with the rotor 3 due to the return force of the rotor 3. The return force of the cover 5 acts on the guide pin 14, but the rotation of the stopper 11 is caused by the inserted key 27.
Since the guide pin 14 is blocked by the side surface of
It stops at position C', and the cover 5 is therefore prevented from returning to the closed state.

When the key is removed from C'→D, the stopper is free to rotate, so the guide pin is pushed and rotated by the rotational force of the cover, and moves to the opening passage.

D→A' returns to the closed state by the turning force of the cover.

Repeat this cycle.

As is clear from the above description of the embodiments, in the present invention, after the unlocking operation is performed, the cover is held open by the guide pin of the stopper while the key is inserted into the stopper. After the key is removed, the engagement between the guide pin and the cover is released and the cover returns to the closed state.
This eliminates the inconvenience that the cover rotates and continues to come into contact with the key after the unlocking operation is performed.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side cross-sectional view of the cylinder lock with the cover closed, and FIGS. 2a and 2b are front views of the stopper and -
3 is a front view of the rotor, FIG. 4 shows the cover, FIG. 4a is a front view seen from the back, FIG. −
FIG. 4 d is a sectional view taken along the line, FIG. 4 e is a sectional view taken along the line 5, and FIGS.
FIG. 7 is an explanatory diagram showing the operation of the cover, FIG. 7 is an explanatory diagram showing the locked state of the locking part, and FIG. 8 is an explanatory diagram showing the relative movement relationship between the cover and the guide pin. 3...rotor, 4...body, 5...cover,
7... Spring, 23, 26... Locking part.

Claims (1)

[Claims for Utility Model Registration] A cover 5 that opens and closes the front surface of the rotor is rotatably pivoted to the body 4 that houses the rotor 3, and a spring 7 that applies rotational force to the cover 5 from the open state to the closed state. are installed between the body 4 and the cover 5, and when the cover 5 is opened, they lock each other and hold the cover 5 in the open state, while the cover 5 is pushed up in the direction away from the body 4. In a cylinder lock with a cover, in which locking portions 23 and 26 are formed at corresponding positions on the cover 5 and the body 4, respectively, and the locking portions 23 and 26 are released when the lock is released, there is a lock between the cover 5 and the front end of the rotor 3. A stopper 11 is attached to the front end of the rotor 3 via a shaft pin 13 so as to be rotatable within a certain angle range, and has a key insertion hole 12 and a guide pin 14; Opening passage 21 into which the 11 guide pins 14 fit
The opening passage 19 is formed in the left-right direction along an arc centered on the rotational fulcrum of the cover 5, and the guide pin 14 moves into the opening passage when the cover 5 is opened. 19, the key insertion hole 12 is set to match the rotor key hole 3c, and the unlocking passage 20 is continuous with one end of the opening passage 19 when the cover 5 is in the open state. The stopper 1 is formed vertically along an arc centered on the position of the rotor 3 in the
1 is moved, the guide pin 14 is set to move along the unlocking passage 20, and the holding passage 21 is formed concentrically adjacent to the unlocking passage 20, After the guide pin 14 moves through the unlocking passage 20, since the cover 5 is biased in the closing direction by the spring 7, it is set to move to the holding passage 21 and come into contact with the wall 21b thereof. A cylinder lock with a cover.