JP2014020132A - Cylinder lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow an inner cylinder 3 to be easily replaced without failure in a cylinder lock in which only the inner cylinder 3 can be inserted in and pulled out from an outer cylinder 2.SOLUTION: An inside of an outer cylinder 2 includes: a rotation transmission body 7 engaged with a rear end of an inner cylinder 3 and rotating integrally with the inner cylinder 3; a spring 8 pushingly energizing the rotation transmission body 7 toward the rear end of the inner cylinder 3; and an idling prevention part 9 engaging with the rotation transmission body 7 to stop its rotation only when the rotation transmission body 7 is pushed forward by the spring 8 with pull-out of the inner cylinder 3.

Description

  The present invention relates to a cylinder lock that allows only an inner cylinder to be inserted into and removed from an outer cylinder.

  A cylinder lock with a relatively simple structure that is attached to a desk drawer, locker door, etc. has an inner cylinder housed in an outer cylinder, and a tumbler that operates in the radial direction by inserting and removing a key is incorporated in this inner cylinder. It has a configuration. This type of cylinder lock is a cylinder lock that allows only the inner cylinder to be replaced with respect to the outer cylinder in order to cope with loss of keys, security, or failure of the inner cylinder in recent years. Has been proposed (see Patent Document 1).

In general, a cylinder lock has a structure in which a key is inserted into an inner cylinder for locking and unlocking, and a rotational force applied to the inner cylinder is extracted to the rear of the outer cylinder when the key is rotated. The extracted rotational force is transmitted to a lock mechanism that actually performs locking / unlocking with or without a link mechanism.
Therefore, as described above, when the inner cylinder can be exchanged with respect to the outer cylinder, a rotating transmission body that can rotate integrally with the inner cylinder is left in the outer cylinder, and the rotating transmission body and the inner cylinder It is preferable to adopt a structure that can be freely engaged and disengaged.

JP 2007-154522 A

Needless to say, the above-described rotating transmission body needs to be rotatable in the outer cylinder. Therefore, when the inner cylinder is pulled out from the outer cylinder (that is, when the inner cylinder is separated from the rotating transmission body), the rotating transmission body has nothing to regulate the rotation in the outer cylinder (rotation-free State).
As described above, since the link mechanism and the lock mechanism are connected to the rotation transmission body, unexpected rotation force may be transmitted to the rotation transmission body by the link mechanism and the lock mechanism. In some cases, the rotating transmission body rotates within the outer cylinder.

If the rotating transmission body rotates in the outer cylinder while the inner cylinder is being pulled out, the inner cylinder and the rotating transmission body will not engage properly even if the inner cylinder is next inserted into the outer cylinder. As a result, there was a risk that it would lead to poor insertion or rotation of the inner cylinder.
Incidentally, in the above-mentioned Patent Document 1, countermeasures have been taken against such problems by packing a protective device made of an elastic material into the outer tube after the inner tube is pulled out. However, when the protector incurs high costs and the protector comes off, there are naturally various problems such as failure to prevent the inner cylinder from being poorly inserted or rotating.

  The present invention has been made in view of the above circumstances, and in a cylinder lock in which only the inner cylinder can be inserted into and removed from the outer cylinder, the replacement of the inner cylinder can be easily performed without failure. The purpose is to provide a cylinder lock.

In order to achieve the above object, the present invention has taken the following measures.
That is, the cylinder lock according to the present invention is a cylinder lock having an outer cylinder and an inner cylinder accommodated in the outer cylinder, and incorporating a tumbler that operates in the radial direction by inserting and removing a key with respect to the inner cylinder. In the outer cylinder, a rotating transmission body that engages with a rear end of the inner cylinder and rotates integrally with the inner cylinder, and a spring that presses and urges the rotating transmission body toward the rear end of the inner cylinder. And an anti-spinning portion that engages and stops rotation only when the rotary transmission body is pushed forward by the spring as the inner cylinder is pulled out. Features.

A back-up body is provided at the rear end of the outer cylinder so as to stop the spring and cause the spring to generate a spring force toward the rotation transmission body. The backup body includes the rotation transmission body and the inner part. It is preferable that a sliding guide portion that holds the fitting structure of the fitting or the outer fitting and guides the back-and-forth movement of the rotating transmission body is provided.
In this case, the backup body is held rotatably with respect to the outer cylinder, and the sliding guide portion of the backup body prevents relative rotation with the rotating transmission body and rotates integrally with the rotating transmission body. It should be formed in a non-rotating form that allows it.

  The outer cylinder is provided with an engaging portion for preventing the backup body from moving forward, and the backup body may be prevented from being detached from the outer cylinder by a rear closing member fixed to the outer cylinder. .

  In the cylinder lock according to the present invention, when only the inner cylinder is inserted into and removed from the outer cylinder, the replacement of the inner cylinder can be easily performed without failure.

It is the sectional side view which showed 1st Embodiment of the cylinder lock which concerns on this invention. It is the sectional side view which showed the condition which pulls out an inner cylinder in the cylinder lock of 1st Embodiment. It is the partial crushing perspective view which decomposed | disassembled the cylinder lock of 1st Embodiment, and abbreviate | omitted the spring. It is the sectional side view which showed 2nd Embodiment of the cylinder lock which concerns on this invention. It is the partial crushing perspective view which decomposed | disassembled the cylinder lock of 2nd Embodiment, and abbreviate | omitted the spring. It is the sectional side view which showed 3rd Embodiment of the cylinder lock which concerns on this invention. It is an AA arrow directional view of FIG. It is the sectional side view which showed 4th Embodiment of the cylinder lock which concerns on this invention. It is the sectional side view which showed the condition which pulls out an inner cylinder in the cylinder lock of 4th Embodiment. It is the partial crushing perspective view which decomposed | disassembled the cylinder lock of 4th Embodiment, and abbreviate | omitted the spring. It is the sectional side view which showed 5th Embodiment of the cylinder lock which concerns on this invention. It is the sectional side view which showed the condition which pulls out an inner cylinder in the cylinder lock of 5th Embodiment. It is the partial crushing perspective view which decomposed | disassembled the cylinder lock of 5th Embodiment, and abbreviate | omitted the spring. It is the sectional side view which showed 6th Embodiment of the cylinder lock which concerns on this invention. It is the sectional side view which showed 7th Embodiment of the cylinder lock which concerns on this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
1 to 3 show a first embodiment of a cylinder lock 1 according to the present invention. The cylinder lock 1 has an outer cylinder 2 and an inner cylinder 3 accommodated in the outer cylinder 2. Although illustration is omitted, a plurality of tumblers are incorporated in the inner cylinder 3, and by inserting / removing a specific key used for locking / unlocking to / from the inner cylinder 3, these tumblers are provided in a predetermined radial direction. A retraction operation is performed, and rotation or non-rotation of the inner cylinder 3 is selected.

In addition to the key for unlocking / unlocking, a key for changing the inner cylinder 3 is prepared. When the change key is inserted into the inner cylinder 3, the protruding state is set to the normal state. A tumbler for retaining is inserted into the inner cylinder 3 so that the inner cylinder 3 can be pulled out from the outer cylinder 2.
And in the cylinder lock 1 which concerns on this invention, the rotation transmission body 7, the spring 8 (illustration omitted in FIG. 3), and the idling prevention part 9 are provided in the outer cylinder 2. As shown in FIG. A backup body 10 is provided at the rear end of the outer cylinder 2.

  In the following, the cylinder lock 1 will be described with the left side of FIG. 1 as “front” and the right side of FIG. 1 as “rear”. Therefore, this cylinder lock 1 is attached so that the right side of FIG. 1 in the outer cylinder 2 is pushed into an attachment hole provided in a desk drawer, etc. 5 is connected. Also, the key is inserted into and removed from the inner cylinder 3 on the left side of FIG. These positional relationships in the front-rear direction are common to other embodiments.

Inside the outer cylinder 2, a circular hollow inner cylinder holding chamber 12 is provided in the first half area, and the inner cylinder holding chamber 12 is formed in a rear half area on the rear side of the inner cylinder holding chamber 12 so as to be slightly larger in diameter than the inner cylinder holding chamber 12. A circular hollow rotation switching chamber 13 is provided.
The inner cylinder 3 is inserted into the inner cylinder holding chamber 12 so as to be rotatable and removable. The inner cylinder 3 is provided with a flange 3a that projects to the outer periphery of the front portion, and the amount of insertion of the inner cylinder 3 into the inner cylinder holding chamber 12 is limited by the stopper of the flange 3a. On the other hand, the above-mentioned rotation transmission body 7, the spring 8, and the idling prevention portion 9 are accommodated in the rotation switching chamber 13, and the back-up body described above is closed so as to close the rear opening of the rotation switching chamber 13. 10 is arranged.

The rotation transmission body 7 is provided so as to protrude into a rectangular block shape on the rear surface of the disk-shaped main body portion 7a, which is fitted so as to be rotatable in the rotation switching chamber 13 of the outer cylinder 2. And a rear projecting portion 7b.
The rotational transmission body 7 remains in the outer cylinder 2 when the inner cylinder 3 is pulled forward from the outer cylinder 2, and when the inner cylinder 3 is inserted into the outer cylinder 2, 3 is engaged with the rotary transmission body 7 so that the inner cylinder 3 and the rotary transmission body 7 rotate integrally within the outer cylinder 2. Therefore, an uneven engagement structure is employed between the rear end portion of the inner cylinder 3 and the front surface portion of the rotary transmission 7 so as to be freely fitted and detached in the cylinder axis direction.

  In the first embodiment, a square-shaped convex portion 15 is provided at the rear end portion of the inner cylinder 3, and a square-hole-shaped concave portion 16 into which the convex portion 15 fits on the front surface of the rotational transmission body 7 (main body portion 7 a). Are provided, and the convex portion 15 and the concave portion 16 constitute an uneven engagement structure. In addition, the recessed part 16 may be provided in the inner cylinder 3, and the convex part 15 may be provided in the rotational transmission body 7. FIG. Further, if the convex portion 15 and the concave portion 16 are non-rotating so as not to rotate around the cylinder axis when fitted to each other, the convex portion 15 has a rectangular protruding shape, or the concave portion 16 has a square hole shape. This is not particularly limited. Furthermore, the concave / convex engagement structure formed by the convex portion 15 and the concave portion 16 is not limited to being arranged at the cylinder axis position (circular center), and can be an eccentric position.

As described above, the backup body 10 is disposed at the position where the rear opening of the rotation switching chamber 13 in the outer cylinder 2 is closed, and the spring 8 is compressed in the cylinder axis direction so that the spring 8 is directed to the rotation transmission body 7. A spring force is generated (forward).
The backup body 10 is formed in a disk shape so as to be rotatably held with respect to the outer cylinder 2. A circumferential groove 21 is formed in the outer peripheral portion of the backup body 10, and a retaining member 22 such as a pin or a screw is inserted radially inward from the outer peripheral surface of the outer cylinder 2 to engage with the circumferential groove 21. . As a result, the backup body 10 is prevented from being detached from the outer cylinder 2 and is rotatably held.

A recess-shaped sliding guide portion 23 is formed on the front surface of the backup body 10, and the sliding guide portion 23 is fitted between the two so that the rearward protruding portion 7 b of the rotating transmission body 7 is externally fitted. A combined structure is constructed.
As described above, the rear projecting portion 7b of the rotating transmission body 7 projects in a rectangular block shape, and the sliding guide portion 23 of the backup body 10 has a rectangular opening shape so as to correspond to this projecting shape. It has become. Thus, the rearward projecting portion 7b and the sliding guide portion 23 are non-rotating around the cylinder axis. Therefore, in the fitting structure constituted by the rearward projecting portion 7b and the sliding guide portion 23, the rotation transmission body 7 and the backup body 10 are prevented from rotating relative to each other, and both rotate integrally.

  When the inner cylinder 3 is pulled forward of the outer cylinder 2, the rotational transmission body 7 moves forward in the outer cylinder 2. The forward movement amount of the rotational transmission body 7 at this time is the amount of movement of the outer cylinder 2. The rotation switching chamber 13 is regulated by a stopper 24 (see FIG. 3) provided by raising a part of the inner circumferential surface of the rotation switching chamber 13 from the inner circumferential surface. However, even when the stopper 24 is not provided, the rotational transmission body 7 is restricted by the annular step surface generated at the boundary between the rotation switching chamber 13 and the inner cylinder holding chamber 12.

  In any case, even if the rotational transmission body 7 moves forward in this way, the rear protruding portion so that the fitting between the rear protruding portion 7b and the sliding guide portion 23 is not released (the fitting structure is maintained). The protruding amount of 7b and the recessed amount of the sliding guide portion 23 are set. That is, the situation where the rotary transmission body 7 and the backup body 10 rotate integrally is always maintained even when the inner cylinder 3 is pulled out from the outer cylinder 2 or when the inner cylinder 3 is inserted into the outer cylinder 2. It has become so.

A through hole 30 is formed in the rear end surface of the backup body 10, and a transmission hole 31 is formed in the rear end surface of the rotary transmission body 7 to be engaged with the connection end 5 with the link mechanism or the lock mechanism. And the transmission hole 31 match. It is also possible to omit the transmission hole 31 and make the through-hole 30 act as a transmission hole.
The idling prevention unit 9 is provided in a state of rising from the inner peripheral surface in a part of the inner peripheral surface in the circumferential direction with respect to the rotation switching chamber 13 of the outer cylinder 2. In the first embodiment, the anti-spinning portion 9 is provided so as to protrude rearward from the stopper 24 (see FIG. 3). The rotational transmission body 7 is formed with a notch-shaped recess 25 in a part of the outer peripheral surface of the main body portion 7 a so as to engage with the idling prevention portion 9.

Therefore, the idling prevention portion 9 comes into engagement with the rotational transmission body 7 (concave portion 25) only when the rotational transmission body 7 is pushed forward by the spring 8 as the inner cylinder 3 is pulled out. By this engagement, the rotation transmission body 7 is prevented from rotating in the outer cylinder 2.
The anti-spinning portion 9 is engaged with the rotary transmission body 7 when the rotary transmission body 7 moves forward by pulling the inner cylinder 3 forward of the outer cylinder 2. It is formed in such a size that the engagement with the rotation transmission body 7 is released when the rotation transmission body 7 is pushed backward by being inserted into the inside.

As described above, the cylinder lock 1 having the detailed configuration can be used as follows.
That is, as a normal use state, as shown in FIG. 1, the inner cylinder 3 is inserted into the inner cylinder 3 inserted into the outer cylinder 2 by inserting a key for locking / unlocking and rotating the key. Then the tumbler moves in the retreat direction and rotates with the key. Therefore, the rotation transmission body 7 and the backup body 10 are also integrally rotated by the rotation of the inner cylinder 3, and the rotational force is transmitted to the connection end 5 of the link mechanism or the lock mechanism through the transmission hole 31 or the through hole 30. become.

On the other hand, when the inner cylinder 3 needs to be replaced, the change key is inserted into the inner cylinder 3. As a result, a tumbler for retaining the inner cylinder 3 is immersed, and the inner cylinder 3 can be pulled out from the outer cylinder 2.
When the key for unlocking / unlocking is inserted / removed into / from the inner cylinder 3, the rotation angle of the inner cylinder 3 with respect to the outer cylinder 2 is uniquely determined. Therefore, the rotation angle of the inner cylinder 3 through which the change key can be inserted into the inner cylinder 3 is inevitably unique (there is only one place in the rotation operation angle).

When the inner cylinder 3 is pulled out from the outer cylinder 2, the rotation transmission body 7 is pushed forward by the spring 8 in the outer cylinder 2 (rotation switching chamber 13) as shown in FIG. At this time, as shown in FIG. 3, the rotational transmission body 7 (concave portion 25) is engaged with the idling prevention portion 9 provided on the inner peripheral surface of the outer cylinder 2. Therefore, the rotation of the rotary transmission 7 within the outer cylinder 2 is prevented.
Further, even if the rotary transmission body 7 moves forward in this way, the fitting structure constituted by the rear protrusion 7b of the rotary transmission body 7 and the sliding guide portion 23 of the backup body 10 has a fitted state. It will not be released. Therefore, relative rotation does not occur between the rotating transmission body 7 and the backup body 10, and a restricted state in which the rotating transmission body 7 does not rotate in the outer cylinder 2 is derived from the backup body 10.

That is, even after the inner cylinder 3 is pulled out from the outer cylinder 2, the transmission hole 31 and the through-hole 30 connected to the connection end 5 of the link mechanism or the lock mechanism are maintained in a non-rotating state.
As a result, even if an unexpected rotational force is transmitted to the transmission hole 31 or the through-hole 30 by the link mechanism or the lock mechanism, the rotational transmission body 7 rotates. There is no.

Therefore, after that, when the inner cylinder 3 is inserted into the outer cylinder 2, the convex portion 15 of the inner cylinder 3 and the concave portion 16 of the rotary transmission 7 are surely engaged to form the concave-convex engagement structure. Thus, a situation in which the inner cylinder 3 and the rotary transmission 7 rotate together is obtained. Thus, the replacement of the inner cylinder 3 can be easily performed without failure.
[Second Embodiment]
4 and 5 show a second embodiment of the cylinder lock 1 according to the present invention. The cylinder lock 1 of the second embodiment is most different from the first embodiment (FIGS. 1 to 3) in that a through hole 35 for externally fitting the rearward projecting portion 7b of the rotary transmission body 7 to the backup body 10 is provided. The fitting structure is formed between the inner peripheral edge of the through hole 35 and the outer peripheral surface of the rearward projecting portion 7b. That is, the inner peripheral edge of the through hole 35 is formed as a sliding guide portion 23 for guiding the forward and backward movement of the rotary transmission body 7.

  Further, in the second embodiment, the rear projecting portion 7b of the rotary transmission body 7 projects rearward of the outer cylinder 2 through the through hole 35 of the backup body 10, so that the rear projecting portion 7b The formed transmission hole 31 is directly connected to the connection end 5 of the link mechanism or the lock mechanism (the through hole 30 for connecting to the connection end 5 is not provided in the backup body 10).

In the second embodiment, the rear projecting portion 7b of the rotary transmission body 7 is formed in a cylindrical shape coaxial with the main body portion 7a, and the through hole 35 of the backup body 10 does not rattle with the rear projecting portion 7b. It is assumed that it is formed in a circular hole. Therefore, the rotation transmission body 7 and the backup body 10 are freely rotatable relative to each other.
For this reason, the backup body 10 is not limited to be rotatably attached to the outer cylinder 2, and a retaining member 22 such as a pin or a screw is inserted radially inward from the outer peripheral surface of the outer cylinder 2. The backup body 10 is directly press-fitted or screwed. Thereby, the circumferential groove 21 as employed in the first embodiment is not necessary.

Other configurations and operational effects in the second embodiment are substantially the same as those in the first embodiment. Therefore, the detailed description here is abbreviate | omitted by attaching | subjecting the same code | symbol to what has the same effect | action.
[Third Embodiment]
6 and 7 show a third embodiment of the cylinder lock 1 according to the present invention. The cylinder lock 1 of the third embodiment is basically the same as that of the second embodiment (FIGS. 4 and 5), and the rear protrusion 7b of the rotating transmission body 7 is externally fitted to the backup body 10. A through hole 35 is formed, and the inner periphery of the opening of the through hole 35 is a sliding guide portion 23 for guiding the forward and backward movement of the rotary transmission body 7.

Further, the rear projecting portion 7b of the rotary transmission body 7 is formed in a cylindrical shape, and the through hole 35 of the backup body 10 is formed in a circular hole so that the rotary transmission body 7 and the backup body 10 are relatively rotatable. .
The third embodiment is different from the second embodiment in that the backup body 10 is formed of a plate material and is formed in a rhombus shape (see FIG. 7) in which screw insertion portions 36 are projected to both sides in the diameter direction. It is in the point. Naturally, the outer cylinder 2 is also provided with a female screw part for screwing a screw 37 inserted into the screw insertion part 36 (not shown in the figure. In addition, in order to provide the female screw part, the outer cylinder 2 (See FIG. 10 of the fourth embodiment to be described later for the outer shape adopted for the rear end).

Other configurations and operational effects in the third embodiment are substantially the same as those in the first embodiment. Therefore, the detailed description here is abbreviate | omitted by attaching | subjecting the same code | symbol to what has the same effect | action.
[Fourth Embodiment]
8 to 10 show a fourth embodiment of the cylinder lock 1 according to the present invention. The cylinder lock 1 of the fourth embodiment is basically the same as that of the third embodiment (FIGS. 6 and 7). The most different point of the cylinder lock 1 of the fourth embodiment from the third embodiment is that an anti-spinning portion 9 is provided for the backup body 10. Naturally, since the slip prevention part 9 is provided in the backup body 10, the slip prevention part 9 provided in the inner peripheral surface of the outer cylinder 2 in other embodiments (FIG. 3 of the first embodiment or the second embodiment). (See Fig. 5).

The idling prevention part 9 provided in the backup body 10 is partly in the circumferential direction with respect to the through hole 35 (sliding guide part 23) for guiding the rearward projecting part 7b of the rotary transmission body 7 to move back and forth. It is formed by providing a square recess. In other words, the opening edge of the dent functions as the idling prevention unit 9.
On the other hand, the rear projecting portion 7b of the rotary transmission body 7 is provided with a ridge 40 that protrudes radially outward while being along the cylinder axis direction at a part of the circumferential surface of the outer peripheral surface. . The protrusion 40 has a missing portion 41 formed at a substantially central position along the cylinder axis direction. The missing portion 41 is formed to have a depth reaching the outer peripheral surface of the rearward protruding portion 7 b and an opening dimension in the cylinder axis direction wider than the plate thickness of the backup body 10.

Further, as shown in FIG. 8, when the inner cylinder 3 is inserted into the outer cylinder 2, the missing portion 41 is arranged in the backup body 10 (that is, the opening peripheral portion of the through-hole 35, and is idling. Prevention part 9
Is the same arrangement as
Therefore, as shown in FIG. 8, when the rotating transmission body 7 is pushed backward by inserting the inner cylinder 3 into the outer cylinder 2, the missing portion 41 of the protrusion 40 provided on the rotating transmission body 7 is backed up. Since it corresponds with the idling prevention part 9 of the body 10, rotation of the rotation transmission body 7 is permitted. Therefore, when the inner cylinder 3 is rotated with respect to the outer cylinder 2, the idling prevention unit 9 does not hinder the rotation of the rotating transmission body 7 that attempts to rotate integrally with the inner cylinder 3.

  On the other hand, as shown in FIG. 9, when the rotary transmission body 7 moves forward by pulling out the inner cylinder 3 from the outer cylinder 2, the missing portion 41 of the protrusion 40 provided on the rotary transmission body 7 is a backup body. This is inconsistent with the 10 anti-spinning parts 9. That is, the protrusion 40 of the rotary transmission 7 is fitted in the idling prevention unit 9. Therefore, the rotation transmission body 7 is held in a state where it does not rotate.

Other configurations and operational effects in the fourth embodiment are substantially the same as those in the third embodiment. Therefore, the detailed description here is abbreviate | omitted by attaching | subjecting the same code | symbol to what has the same effect | action.
[Fifth Embodiment]
11 to 13 show a fifth embodiment of the cylinder lock 1 according to the present invention. The cylinder lock 1 of the fifth embodiment is also provided with an anti-spinning portion 9 for the backup body 10. Naturally, since the slip prevention part 9 is provided in the backup body 10, the slip prevention part 9 provided in the inner peripheral surface of the outer cylinder 2 in other embodiments (FIG. 3 of the first embodiment or the second embodiment). (See Fig. 5).

The idling prevention portion 9 provided in the backup body 10 is a part of the peripheral portion of the opening with respect to the through hole 35 (sliding guide portion 23) that guides the rearward projecting portion 7b of the rotating transmission body 7 to move back and forth. It is formed by providing a straight portion in the chord direction. In other words, this straight line portion acts as the idling prevention portion 9.
On the other hand, the rear projecting portion 7b of the rotational transmission body 7 is provided with a flat surface 43 extending in the cylinder axis direction at a part of the outer peripheral surface in the circumferential direction. Further, a circumferential groove 44 is formed at a substantially central position along the cylinder axis direction of the rear protruding portion 7b.

  A cross-sectional circle of the rear protrusion 7 b drawn by the groove bottom of the circumferential groove 44 is a concentric circle with respect to the outer diameter of the rear protrusion 7 b and has an outer diameter inscribed in the flat plane 43. Further, as shown in FIG. 11, the circumferential groove 44 is arranged in the cylinder axis direction when the inner cylinder 3 is inserted into the outer cylinder 2, that is, the backup body 10 (that is, the opening circumferential portion of the through hole 35). And includes the idling prevention unit 9).

  Accordingly, as shown in FIG. 11, when the rotary transmission body 7 is pushed backward by inserting the inner cylinder 3 into the outer cylinder 2, the circumferential groove 44 provided in the rotary transmission body 7 passes through the backup body 10. Since it coincides with the hole 35, the rotation transmission body 7 is allowed to rotate. Even if the slip prevention portion 9 (straight portion in the chord direction) exists in the middle of the opening peripheral portion of the through hole 35, the circumferential groove 44 has a groove depth that does not interfere with the slip prevention portion 9. Therefore, the idling prevention unit 9 does not hinder the rotation of the rotating transmission body 7.

Therefore, when the inner cylinder 3 is rotated with respect to the outer cylinder 2, the inner cylinder 3 and the rotating transmission body 7 are allowed to rotate integrally.
On the other hand, as shown in FIG. 12, when the rotary transmission body 7 moves forward by pulling out the inner cylinder 3 from the outer cylinder 2, the circumferential groove 44 provided in the rotary transmission body 7 is a through hole of the backup body 10. 35. At this time, the flat surface 43 provided in the rearward projecting portion 7b of the rotary transmission member 7 faces and contacts the idling prevention portion 9 (straight portion in the string direction) provided in the middle of the opening peripheral portion in the through hole 35. Or it is in the state where it was near parallel. Therefore, the rotation transmission body 7 is held in a non-rotating state by the idling prevention unit 9.

Other configurations and operational effects in the fifth embodiment are substantially the same as those in the third embodiment. Therefore, the detailed description here is abbreviate | omitted by attaching | subjecting the same code | symbol to what has the same effect | action.
[Sixth Embodiment]
FIG. 14 shows a sixth embodiment of the cylinder lock 1 according to the present invention. In the cylinder lock 1 of the sixth embodiment, the fitting structure configured between the rotation transmission body 7 and the backup body 10 is such that the rotation transmission body 7 side is “concave” and the backup body 10 side is “convex”. It is said that. In this respect, it is greatly different from the first to fifth embodiments.

That is, the rotation transmission body 7 is formed only by the disk-shaped main body part fitted so that it can rotate within the rotation switching chamber 13 of the outer cylinder 2 (it does not have the back protrusion part 7b). Further, a rectangular rear surface recess 46 is formed on the rear surface of the rotary transmission body 7.
On the other hand, on the front surface of the backup body 10, a sliding guide portion 23 that protrudes in a square shape corresponding to the rear surface recess 46 of the rotational transmission body 7 is formed. Accordingly, the sliding guide portion 23 is fitted in the rear recess 46 of the rotary transmission 7.

  As described above, the rear recess 46 of the rotary transmission 7 is a rectangular opening, and the slide guide portion 23 of the backup body 10 protrudes in a square shape. Is a non-rotating shape around the cylinder axis. Therefore, in the fitting structure constituted by the rear surface concave portion 46 and the sliding guide portion 23, the rotation transmission body 7 and the backup body 10 are prevented from rotating relative to each other, and both rotate integrally.

It is the same as in the other embodiments that the rear recess 46 and the sliding guide portion 23 are not disengaged (the fitting structure is maintained) even if the rotational transmission body 7 moves back and forth. It is.
By the way, in the sixth embodiment, the backup body 10 includes a backup main body 50 that fits in the rotation switching chamber 13 of the outer cylinder 2, and a rear closing member 51 that prevents the backup main body 50 from coming off at the rear end of the outer cylinder 2. It consists of two members.

The rear closing member 51 is externally the same as that described as the backup body 10 in the third embodiment (see FIGS. 6 and 7).
In such a sixth embodiment, the backup body 50 of the backup body 10 does not move rearward further by being locked to the rear closing member 51. That is, since the backup body 10 does not project toward the rear of the outer cylinder 2, contact interference between the backup body 10 and other objects does not become a problem in the rear region of the outer cylinder 2.

Other configurations and operational effects in the sixth embodiment are substantially the same as those in the first embodiment. Therefore, the detailed description here is abbreviate | omitted by attaching | subjecting the same code | symbol to what has the same effect | action.
[Seventh Embodiment]
FIG. 15 shows a seventh embodiment of the cylinder lock 1 according to the present invention. Also in the cylinder lock 1 of the seventh embodiment, the fitting structure constituted between the rotation transmission body 7 and the backup body 10 is such that the rotation transmission body 7 side is “concave” and the backup body 10 side is “convex”. It is said that. The backup body 10 is composed of two members, a backup main body 50 and a rear closing member 51.

In the seventh embodiment, the outer cylinder 2 is provided with an engaging portion 53 that prevents the backup body 50 of the backup body 10 from moving forward.
The engaging portion 53 is a portion where the rotation switching chamber 13 of the outer cylinder 2 opens rearward, and is formed so as to dent the opening peripheral portion into a diameter-expanded state. A flange portion 55 formed by projecting radially outward with respect to the backup main body 50 of the backup body 10 is fitted to the engagement portion 53. The amount of depression of the engaging portion 53 is substantially equal to the thickness of the flange portion 55. Therefore, the backup main body 50 has its flange portion 55 sandwiched between the engaging portion 53 and the rear closing member 51, and is fixed to the outer cylinder 2 without causing backlash.

That is, in the seventh embodiment, the backup body 10 as a whole (the backup main body 50 and the rear closing member 51) is fixed to the outer cylinder 2, so that not only the back of the backup body 10 but also the front. There is no movement.
Therefore, the backup body 10 does not operate so as to protrude rearward of the outer cylinder 2, and the advantage that contact interference between the backup body 10 and other objects does not matter in the rear area of the outer cylinder 2 is naturally. It is obtained.

  In addition to this, the backup body 10 does not move forward, so that a unique action is obtained in which a recessed depression does not occur on the rear surface side of the outer cylinder 2. In short, the connection state between the backup member 10 and the connection end 5 of the link mechanism or the lock mechanism is always maintained regardless of whether the inner cylinder 3 is inserted into or removed from the outer cylinder 2. Therefore, there exists an advantage that the connection state of the backup member 10 and the connection end 5 of a link mechanism or a lock mechanism is hold | maintained reliably.

  By the way, in the seventh embodiment, in the outer cylinder 2, the diameter between the inner cylinder holding chamber 12 and the rotation switching chamber 13 is larger than the inner diameter of the inner cylinder holding chamber 12, and the rotation switching chamber 13. An annular step portion having a diameter smaller than the inner diameter is formed. The step portion acts as a stopper 24 for restricting the forward movement of the rotary transmission body 7 when the inner cylinder 3 is pulled forward of the outer cylinder 2.

Other configurations and operational effects in the seventh embodiment are substantially the same as those in the first embodiment. Therefore, the detailed description here is abbreviate | omitted by attaching | subjecting the same code | symbol to what has the same effect | action.
By the way, this invention is not limited to the said embodiment, It can change suitably according to embodiment.
For example, in the backup member 10, the connection structure with the connection end 5 of the link mechanism or the lock mechanism is not limited to adopting the through-hole 30. May be adopted.

The internal structure (number of tumblers, operation structure, etc.) of the inner cylinder 3 is not limited at all.
The use as the cylinder lock 1 is not limited at all.

DESCRIPTION OF SYMBOLS 1 Cylinder lock 2 Outer cylinder 3 Inner cylinder 3a Flange 5 Connection end 7 Rotating transmission body 7a Body part 7b Back protrusion part 8 Spring 9 Anti-spin part 10 Backup body 12 Inner cylinder holding chamber 13 Rotation switching chamber 15 Protrusion part 16 Concave part 21 Circumference Groove 22 Detachment member 23 Sliding guide part 24 Stopper 25 Recess 30 Recess opening 31 Transmission hole 35 Through hole 36 Screw insertion part 37 Screw 40 Projection line 41 Missing part 43 Flat surface 44 Circumferential groove 46 Rear surface recess 50 Backup body 51 Rear closing material 53 engaging part

Claims (4)

In a cylinder lock having an outer cylinder and an inner cylinder accommodated in the outer cylinder, and incorporating a tumbler that operates in the radial direction by inserting and removing a key with respect to the inner cylinder,
In the outer cylinder,
A rotary transmission that engages with the rear end of the inner cylinder and rotates integrally with the inner cylinder;
A spring that presses and urges the rotary transmission body toward the rear end of the inner cylinder;
An anti-spinning portion that engages with the rotation transmission body to prevent rotation only when the rotation transmission body is pushed forward by the spring as the inner cylinder is pulled out,
The cylinder lock characterized by being provided.   A back-up body is provided at the rear end of the outer cylinder so as to stop the spring and cause the spring to generate a spring force toward the rotation transmission body. The backup body includes the rotation transmission body and the inner part. 2. The cylinder lock according to claim 1, further comprising a sliding guide portion that holds the fitting structure of the fitting or the outer fitting and guides the back-and-forth movement of the rotary transmission body.   The backup body is rotatably held with respect to the outer cylinder, and the sliding guide portion of the backup body prevents relative rotation with the rotation transmission body and enables integral rotation with the rotation transmission body. 3. The cylinder lock according to claim 2, wherein the cylinder lock is formed in a non-rotating shape.   The outer cylinder is provided with an engaging portion for preventing the backup body from moving forward, and the backup body is prevented from being detached from the outer cylinder by a rear closing member fixed to the outer cylinder. The cylinder lock according to claim 2 or claim 3.

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