JP4292014B2 - Thumb turn - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a thumb turn used for a lock, and more particularly, to a thumb turn that can cope with so-called thumb turn by making a thumb turn main body freely movable.
[0002]
[Prior art]
Generally, a lock has a case box that is inserted inside a door. A cam is rotatably built in the case box, and the dead bolt is moved forward and backward by rotating the cam. Alternatively, unlocking is possible. The case box is fitted with a cylinder lock from the outdoor side and a thumb turn from the indoor side, and a joint part of the cylinder lock and a tip part of the thumb turn are respectively engaged with the cams. By rotating the key plate from the outside and by rotating the thumb turn knob from the indoor side, the dead bolt is rotated to enable locking and unlocking.
[0003]
That is, FIG. 13 is a diagram showing this relationship, in which 31 is a case box. The case box 31 is provided with a dead bolt 33 and a latch 37 so as to be movable forward and backward, and a cam 32 connected to the dead bolt 33 is rotatably provided. The dead bolt can be moved forward and backward, and the latch 37 can be moved forward and backward by operating the lever 40 mounted on the case box.
[0004]
A thumb turn 39 is mounted on the indoor side, and a cylinder lock 38 is mounted on the case box 31 from the outdoor side, and a tip portion of the thumb turn 39 and a joint portion of the cylinder lock are connected to the cam 32, respectively. Accordingly, from the indoor side, the thumb bolt 3901 is rotated to operate the dead bolt 33 so that it can be locked or unlocked. From the outdoor side, the key plate inserted into the cylinder lock By rotating (not shown), the deadbolt 33 can be moved forward and backward to lock or unlock.
[0005]
Here, FIG. 14 is a view showing the front surface of the cam 32. In general, the cam 32 has a substantially cylindrical shape, and engagement protrusions 34 are formed on both end surfaces along the longitudinal direction. ing.
[0006]
On the other hand, a joint portion 35 that can be engaged with the engaging protrusion 34 is formed at the tip of the cylinder lock. When the cylinder lock is mounted on the case box, as shown in FIG. The joint portion 35 is arranged in such a manner that the joint portion 35 can be locked to the engagement protrusion 34 of the cam 32. And thereby, the said joint part 35 is rotated by rotating a key board, and, thereby, it is possible to advance and retract the dead bolt 33 from the outdoor side.
[0007]
On the other hand, the tip portion 36 of the thumb turn that is attached to the case box 31 from the indoor side is also shaped to be able to be locked to the engagement protrusion 34 of the cam 32, and when the thumb turn is attached to the case box, 16, the tip portion 36 of the thumb turn is arranged so as to be locked to the engaging protrusion 34 of the cam 32, and by rotating the thumb turn, the dead bolt 33 is moved from the indoor side. It is possible to advance and retreat.
[0008]
By the way, with the increase in picking in recent years, various types of crime prevention cylinder locks have started to be provided, but with the method of “turning the thumb turn” as an unauthorized unlocking that cannot be handled with this crime prevention cylinder lock Damage is increasing.
[0009]
Here, this “thumb turn” means that a hole is made in the door with a drill or the like, a special tool or the like is pointed into the indoor side through this hole, and the thumb turn knob is directly rotated and unlocked with this tool. Is the method.
[0010]
As described above, according to this method which has been increasing recently, there is a problem that even when a cylinder lock corresponding to picking is used because the unlocking is performed by operating the thumb turn knob from the indoor side.
[0011]
In this regard, in order to face this “thumb turn”, a method of covering the periphery of the thumb turn with a cap or the like is also considered in part, but even if this method is adopted, the cap is removed. It is hard to say that this is an effective response because there is a risk of getting a thumb turn.
[0012]
Further, as a thumb turn that can prevent such “thumb turn”, a shaft side clutch plate fixed to the thumb turn shaft, a knob side clutch plate fixed to the thumb turn knob and press-contactable with the shaft side clutch, and a shaft side clutch By using a clutch spring that urges the plate and the knob side clutch plate in the direction away from each other, this pushes the knob in the axial direction that is the door direction, and if both clutches are not pressed, the pivoting operation of the knob is A technique that prevents transmission of information is disclosed.
[0013]
[Patent Document 1]
Japanese Patent Laying-Open No. 2003-56220 (FIG. 1)
[0014]
[Problems to be solved by the invention]
However, in this method, there is a problem that “thumb turn” cannot be effectively prevented when the thumb turn knob can be pushed toward the door by any method.
[0015]
Therefore, an object of the present invention is to provide a thumb turn that can effectively prevent the thumb turn.
[0016]
[Means for Solving the Problems]
The thumb turn of the present invention is
It is a thumb turn attached to the lock case box,
A thumb turn case attached to the case box;
An adjustment ring that is removably coupled to the thumb turn case;
A thumb turn body that is inserted into the adjustment ring and the thumb turn case so as to freely advance and retract;
Elastic means interposed between the adjustment ring and the thumb-turn body, and biasing the adjustment ring and the thumb-turn body in a repelling direction;
Locking means for restricting the movement of the thumb turn body to the side opposite to the case box; and
The thumb turn main body can be engaged with a cam provided in a case box provided at a tip portion of the thumb turn main body, and the cam is rotated when the position of the engaging protrusion is changed by rotating the cam by an arbitrary angle. And a pin projecting in a direction perpendicular to the longitudinal direction of the joint portion, and the joint portion does not engage the cam in a normal stationary state. It is inserted in the adjustment ring and the thumb turn case so as to be able to move forward and backward.
The thumb turn case includes a ring insertion portion that can be inserted in the vicinity of a tip end portion of the adjustment ring, a through hole that can penetrate the thumb turn body, and a case side engagement portion formed at an upper end portion thereof,
The adjustment ring includes a ring-side through-hole that can penetrate the thumb-turn body, a passage groove that is connected to the ring-side through-hole and that allows a pin protruding from the thumb-turn body to pass through, and the case-side engagement portion. And a ring side engagement portion that can be engaged with each other.
[0017]
In the thumb turn of the present invention, the adjusting ring and the thumb turn body are repelled from each other by interposing an elastic means between the adjustment ring and the thumb turn body.
In the normal state, the thumb turn body and the cam are prevented from engaging with each other.
[0018]
Therefore, the cam cannot be rotated by simply turning the thumb turn body. To turn the cam, the thumb turn body must be pushed into the case box side against the urging force of the elastic means. For this reason, even when a special tool or the like is used, it is not easy to turn the cam by operating the thumb turn from the outdoor side, and it is possible to prevent the thumb turn.
[0019]
Further, in the present invention, in the normal state, the engagement between the thumb turn body and the cam is prevented, and in order to rotate the cam, the thumb turn body is moved to the case box side while opposing the urging force of the elastic means. It has a structure that must be pushed in, and the joint portion provided at the tip portion of the thumb turn body can be engaged with the cam provided inside with respect to the case box, and the cam is rotated by an arbitrary angle. In some cases, it is formed in a shape that makes it impossible to engage with the cam, so if the position of the cam's engaging projection changes due to locking from the outside with a key plate, the thumb turn body is moved to the case box side. Even if it is pushed in, it cannot be engaged with the cam. Therefore, even if the thumb-turn body can be pushed into the case box by some method after locking with the key plate, the thumb-turn body cannot be engaged with the cam. Locking is impossible.
[0020]
And at this time, in the present invention, the thumb turn body projects a pin in a direction perpendicular to the longitudinal direction thereof, and a passage groove through which this pin can pass is formed in the adjustment ring, and the pin passes through the passage groove. The thumb-turn body can be pushed only when it is in a possible position, so if the thumb-turn body is rotated so that the joint can be engaged with the cam, the pin position of the thumb-turn body changes. As a result, the pin cannot pass through the passage groove, so that the thumb-turn body cannot be pushed into the case box, and it is impossible to perform unauthorized unlocking by turning the thumb-turn. become.
[0021]
On the other hand, in the present invention, a case side engagement portion is formed at the upper end portion of the thumb turn case, and a ring side engagement portion that can be engaged with the case side engagement portion is formed in the adjustment ring. By meshing the meshing portion with the ring side meshing portion, the adjustment ring can be inserted into and removed from the thumb turn case and the adjustment ring cannot be rotated, but it is opposed to the urging force of the elastic means. The adjustment ring can be rotated by moving the adjustment ring to the opposite side of the case box and releasing the engagement between the case side engagement portion and the ring side engagement portion. When the position of the engagement protrusion of the cam changes due to locking from the outside, the adjustment ring is moved to the opposite side of the case box so as to oppose the urging force of the elastic means, and the case side engagement portion and the ring side engagement portion are Disengagement After that, the adjustment ring can be properly unlocked from the indoor side by rotating the adjustment ring to a position where the thumb turn body can be pushed into the case box side at a position where it can be engaged with the changed engagement protrusion of the cam. It becomes possible.
[0022]
【Example】
An embodiment of the thumb turn of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view for explaining the structure of the thumb turn of the present embodiment, and FIG. 2 is a front view of the thumb turn of the present embodiment. FIG. 3 is an exploded view of the thumb turn of this embodiment. In FIG. 3, 1 is the thumb turn of this embodiment.
[0023]
The thumb turn 1 of the present embodiment has an adjustment ring 3 removably connected to a thumb turn case 2 attached to a case box inserted inside the door in use. The adjustment ring 3 and the thumb turn case 2, the thumb turn body 4 penetrates in a freely reciprocating manner. Further, a spring 6 as an elastic means is interposed between the adjustment ring 3 and the thumb turn body 4, and the adjustment ring 3 and the thumb turn body 4 repel each other by the urging force of the spring 6. The thumb turn body 4 is biased in the direction, and the joint portion of the thumb turn body 4 is not engaged with the cam in a stationary state. Further, the thumb turn body 4 is provided with an E-ring 7 as a locking means. This restricts the movement of the thumb turn body 4 to the side opposite to the case box, and the adjustment ring 3 in a stationary state and The position of the thumb turn body 4 is fixed.
[0024]
Here, the thumb turn case 2 will be described. The thumb turn case 2 has a substantially cylindrical shape, a concave and convex case side engagement portion 201 is formed at the upper end portion, and a screw portion is provided at the outer periphery of the substantially central portion. This portion is provided with a screwing portion 202 for screwing a decorative cover 5 described later.
[0025]
Further, the side facing the case side engagement portion 201 is a connecting portion 203 connected to the case box, and the shape thereof is an arbitrary shape that can correspond to the shape of the thumb turn mounting location in the case box. .
[0026]
A small-diameter thumb turn through hole 204 through which the thumb turn main body 4 can pass is formed inside the thumb turn case 2, and is continuous with the thumb turn through hole 204. An insertion hole 205 is formed, and an upper portion of the adjustment ring insertion hole 205 is formed with a locking portion 206 for locking the adjustment ring 3.
[0027]
Next, the adjustment ring 3 in the present embodiment has a substantially cylindrical shape, and the vicinity of the lower end thereof is an insertion portion 301 having a diameter that can be inserted into the adjustment ring insertion hole 205. The upper peripheral portion of the upper portion is a shoulder portion 307, and the shoulder portion 307 is locked to the locking portion 206 by inserting the insertion portion 301 into the adjustment ring insertion hole 205.
[0028]
Further, the upper end portion of the adjustment ring 3 is made slightly thicker to make the outer diameter slightly larger to be a knob portion 302, and continuous to the knob portion 302, A ring side engagement portion 303 that can be engaged with the case side engagement portion 201 is formed.
[0029]
Further, a shelf 304 is formed at an arbitrary position on the inner periphery of the adjustment ring 3, and a ring-side through-hole having a diameter through which the thumb turn body 4 can be penetrated at a substantially central portion of the shelf 304. 305 is formed.
[0030]
Here, FIG. 6 is a diagram showing a plane of the adjustment ring 3. In this embodiment, an elongated passage groove 306 is formed continuously to the ring side through hole 305.
[0031]
Next, the thumb-turn body 4 will be described. The thumb-turn body 4 in this embodiment includes a substantially cylindrical shaft portion 401, and a joint portion 402 that is continuous with the shaft portion 401 and is engaged with a cam. Is formed.
[0032]
Here, the joint portion 402 will be described. Generally, since the cam is rotated by the tip portion of the thumb turn or the joint portion of the cylinder lock, the cam is engaged with the tip portion of the thumb turn and the joint portion of the cylinder lock. A mating protrusion is provided (34 in FIGS. 14 to 16). Therefore, the joint portion 402 in this embodiment is formed in a shape that can be engaged with the cam only at a specific position when the thumb turn body 4 is rotated. Specifically, as shown in FIG. 7 and FIG. 8, a pair of thumb turn side engaging protrusions 403 that can be fitted between engaging protrusions formed on the cam are formed at opposing positions. As shown in FIG. 8, the joint portion 402 can be engaged with the cam only when the engaging protrusion 403 is fitted between the engaging protrusions in the cam.
[0033]
Next, a large diameter pedestal portion 405 and a thumb turn knob 406 continuous to the pedestal portion 405 are connected to the opposite side of the shaft portion 401 of the thumb turn main body 4, and the thumb turn main body 4 is connected via the knob 406. It can be rotated.
[0034]
Further, a pin 404 protrudes in the vicinity of the pedestal portion 405 in the shaft portion 401 in a direction orthogonal to the longitudinal direction of the shaft portion 401, and the pin 404 passes through the ring side in the adjustment ring 3. It is possible to pass through a passage groove 306 formed continuously in the hole 305.
[0035]
The thumb turn body 4 configured as described above is configured so that the shaft portion 401 penetrates the case side through hole 204 in the thumb turn case 2 and the ring side through hole 305 in the adjustment ring 3 so that the pedestal portion 405 is While being placed on the shelf 304 of the adjustment ring 3, the spring 6 is interposed between the shelf 304 and the pedestal 405.
[0036]
When the thumb turn body 4 is mounted, an E-ring 7 as a locking means is mounted in an engagement groove 407 formed between the shaft portion 401 and the joint portion 402, and the E-ring 7 is passed through the case side. Locking to the periphery of the lower end of the hole 204, this fixes the position of the thumb turn body 4 in a stationary state and restricts the movement of the thumb turn body 4 to the side opposite to the case box, thereby further adjusting the ring 3 The position of is also fixed.
[0037]
Further, in a normal state, the pin 402 formed on the thumb turn body 4 is more than the shelf 304 in the adjustment ring 3 in an arrangement in which the joint portion 402 of the thumb turn body 4 does not engage with the cam. The thumb turn body 4 is mounted in such an arrangement that it is located on the side opposite to the case box and does not pass through the passage groove 306.
[0038]
In FIG. 7, reference numeral 408 denotes a long groove portion formed in the shaft portion 401, and this long groove portion 408 is used for giving a sense of moderation when the thumb turn body 4 is rotated to a specific position. That is, in the present embodiment, a small hole 207 communicating with the outside is formed in the inner periphery of the case side through hole 204, and the small ball 8 is inserted into the small hole 207, and the small ball 8 is inserted through the spring 9. The small hole 8 is prevented from falling to the case-side through-hole 204 side by the outer peripheral portion of the shaft portion 401. When the rotation position of the thumb turn body 4 with respect to the adjustment ring 3 is at a position where the pin 404 in the thumb turn body 4 can pass through the passage groove 306 formed in the adjustment ring 3, the small ball 8 is slightly elongated groove 402. The long groove portion 402 is formed so as to be embedded in the inside. For this reason, when the thumb turn body 4 is rotated to reach a position where the pin 404 can pass through the passage groove 306, a part of the small ball 8 enters the long groove portion 402, thereby giving a sense of moderation. It is.
[0039]
1 to 3, reference numeral 5 denotes a decorative cover. In the present embodiment, the decorative cover 5 having a substantially trapezoidal side surface and a threaded inner peripheral surface is used as the outer periphery of the thumb turn case 2. Screwed into the part.
[0040]
Next, the operation of the thumb turn 1 of the present embodiment configured as described above will be described. FIG. 9 is a diagram showing a stationary state in which the thumb turn 1 of the present embodiment is mounted on the case box 11. In this state, The joint portion 402 in the main body 4 is not engaged with the cam 12 and therefore cannot be unlocked or locked even if the thumb turn main body 4 is rotated.
[0041]
On the other hand, assuming that the pin 404 passes through the passage groove 306 and the joint portion 402 of the thumb turn body 4 can be engaged with the cam 12 by pushing the thumb turn body 4 toward the case box 11 in the state of FIG. By pushing the main body 4, the joint portion 402 is engaged with the cam 11 as shown in FIG. 10, so that the thumb turn main body 4 can be locked or unlocked by rotation.
[0042]
As described above, in the thumb turn of this embodiment, since the thumb turn main body 4 cannot be unlocked unless it is pushed into the case box 11 side, it is difficult to perform unauthorized unlocking easily even by the method of turning the thumb turn. It is.
[0043]
Next, in the state of FIG. 9, assuming a case where locking is performed from the outdoor side using a key plate, in this case, the position of the engagement protrusion on the cam 12 is changed. In general, in the case of locking or unlocking, the cam 12 rotates about 90 degrees, and the angle of the position of the engaging protrusion 1201 is changed about 90 degrees accordingly.
[0044]
In this case, even when the thumb turn body 4 is pushed into the case box, the joint portion 402 cannot be engaged with the cam 12, and therefore unlocking is impossible even from the indoor side.
[0045]
That is, in FIG. 11, (A) and (C) are states before locking, and in this state, it is assumed that the joint portion 402 indicated by the dotted line can be engaged with the engagement protrusion 1201 of the cam 12. .
[0046]
Then, as described above, the joint portion 402 in the present embodiment has the engagement protrusions 403 that can be fitted between the engagement protrusions 1201 formed on the cam 12 only at two opposing positions. When the cam 12 is rotated by the joint 13 in the cylinder lock while the cam 12 and the joint portion 402 are engaged, the cam 12 is rotated as long as the rotation angle is not about 180 degrees. The joint part 402 cannot be engaged. Therefore, when the position of the engagement protrusion 1201 of the cam 12 is changed by about 90 degrees by locking with the key plate (FIG. 11B), as shown by the dotted line in FIG. 4, the engaging protrusion 403 of the joint portion 402 collides with the engaging protrusion 1201 of the cam 12, and the joint portion 402 and the cam 12 cannot be engaged.
[0047]
At this time, the thumb turn 1 of this embodiment is configured so that the thumb turn body 4 can be pushed into the case box only in a position where the pin 404 can pass through the passage groove 306 in relation to the adjustment ring 3. Therefore, in the state shown in FIG. 11D, when the thumb turn body 4 is rotated so that the joint portion 402 can be engaged with the cam 112, the pin position is changed and the pin is changed. 404 cannot pass through the passage groove 306, and the thumb turn body 4 cannot be pushed into the case box 11, and in this case as well, it cannot be unlocked after all.
[0048]
Thus, in the thumb turn 1 of the present embodiment, attention is paid to the fact that the position of the engagement protrusion 1201 on the cam 12 is changed by locking, and in the case of locking by the key plate, the engagement between the cam and the joint portion is not achieved. Furthermore, since the position where the thumb-turn body 4 can be pushed in with respect to the adjustment ring 3 is fixed, it is possible to push the thumb-turn body 4 into the case box side in the case of locking with a key plate. In the case where it is possible by the method, even if the thumb turn body 4 is rotated so that it can be engaged with the joint 402 cam 112, the thumb turn body 4 cannot be pushed into the case box. Therefore, it is possible to reliably prevent unauthorized unlocking.
[0049]
Next, a description will be given of a case where a normal unlocking method is performed from the indoor side after locking with the key plate. In such a case, in the state shown in FIG. 11D, first, as shown in FIG. While adjusting the urging force of 6, the adjustment ring 3 is pulled up to the opposite side of the case box, and the engagement between the adjustment ring 3 and the thumb turn case 2 is released. Thereafter, the adjustment ring 3 is rotated about 90 degrees in the same direction as the rotation direction of the cam 12, and the thumb turn body 4 is also rotated about 90 degrees in the same direction.
[0050]
Then, the rotation of the thumb turn body 4 allows the joint portion 402 to be brought into a position that can be engaged with the cam 12, and the rotation of the adjustment ring 3 enables the thumb turn body 4 to be pushed in this state. Accordingly, in this state, the thumb turn body 4 can be pushed and rotated to be unlocked. For this purpose, a series of operations are required in which the adjustment ring 3 is first lifted, and then the adjustment ring 3 is rotated in the raised state, and then the thumb turn body 4 is rotated and pushed into the case box. For this reason, it is difficult to make a hole in the door and to perform from the outdoor side through the hole.
[0051]
Thus, according to the thumb turn of the present embodiment, it is possible to sufficiently counter the so-called “thum turn rotation” which has been increasing recently.
[0052]
【The invention's effect】
The thumb turn of the present invention is implemented in the form described above, and has the following effects.
[0053]
In the thumb turn of the present invention, an elastic means is interposed between the adjustment ring and the thumb turn body to urge the adjustment ring and the thumb turn body in a direction that repels each other. Since the engagement with the cam is prevented, the cam cannot be turned by simply turning the thumb turn body. To turn the cam, the thumb turn body is placed on the case box side against the urging force of the elastic means. Must be pushed into. For this reason, even when a special tool or the like is used, it is not easy to turn the cam by operating the thumb turn from the outdoor side, and it is possible to prevent the thumb turn.
[0054]
Further, in the present invention, in the normal state, the engagement between the thumb turn body and the cam is prevented, and in order to rotate the cam, the thumb turn body is moved to the case box side while opposing the urging force of the elastic means. It has a structure that must be pushed in, and the joint portion provided at the tip portion of the thumb turn body can be engaged with the cam provided inside with respect to the case box, and the cam is rotated by an arbitrary angle. In some cases, it is formed in a shape that makes it impossible to engage with the cam, so if the position of the cam's engaging projection changes due to locking from the outside with a key plate, the thumb turn body is moved to the case box side. Even if it is pushed in, it cannot be engaged with the cam. Therefore, even if the thumb-turn body can be pushed into the case box by some method after locking with the key plate, the thumb-turn body cannot be engaged with the cam. Locking is impossible.
[0055]
And at this time, in the present invention, the thumb turn body projects a pin in a direction perpendicular to the longitudinal direction thereof, and a passage groove through which this pin can pass is formed in the adjustment ring, and the pin passes through the passage groove. The thumb-turn body can be pushed only when it is in a possible position, so if the thumb-turn body is rotated so that the joint can be engaged with the cam, the pin position of the thumb-turn body changes. As a result, the pin cannot pass through the passage groove, so that the thumb-turn body cannot be pushed into the case box, and it is impossible to perform unauthorized unlocking by turning the thumb-turn. become.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view for explaining an embodiment of a thumb turn according to the present invention.
FIG. 2 is a front view for explaining an embodiment of a thumb turn according to the present invention.
FIG. 3 is a diagram showing an exploded state of the embodiment of the thumb turn according to the present invention.
FIG. 4 is a longitudinal sectional view of a thumb turn case in the thumb turn embodiment of the present invention.
FIG. 5 is a longitudinal sectional view of an adjustment ring in the embodiment of the thumb turn according to the present invention.
FIG. 6 is a plan view of an adjustment ring in the thumb turn embodiment of the present invention.
FIG. 7 is a view showing a thumb turn body in the thumb turn embodiment of the present invention.
FIG. 8 is a view for explaining a joint portion of a thumb turn body in the thumb turn embodiment of the present invention.
FIG. 9 is a diagram for explaining the operation of the embodiment of the thumb turn according to the present invention.
FIG. 10 is a diagram for explaining the operation of the embodiment of the thumb turn according to the present invention.
FIG. 11 is a diagram for explaining the operation of the embodiment of the thumb turn according to the present invention.
FIG. 12 is a diagram for explaining the operation of the embodiment of the thumb turn according to the present invention.
FIG. 13 is a diagram for explaining a general lock.
FIG. 14 is a view showing the front of a cam in a general lock.
FIG. 15 is a diagram for explaining an engagement relationship between a cam and a cylinder lock in a general lock.
FIG. 16 is a diagram for explaining an engagement relationship between a cam and a thumb turn in a general lock;
[Explanation of symbols]
1 thumb turn
2 thumb turn case
201 Case side joint
202 Threaded part
203 connecting part
204 Case side through hole
205 Adjustment ring insertion hole
206 Locking part
207 small hole
3 Adjustment ring
301 Insertion part
302 Knob
303 Ring side joint
304 shelves
305 Ring side through hole
306 Passing groove
4 Thumb turn body
401 Shaft
402 Joint
403 Engagement protrusion
404 pin
405 pedestal
406 thumb turn knob
407 engaging groove
408 Long groove
5 Makeup cover
6 Spring
7 E-ring
8 small balls
9 Spring
10 screws
11 Case box
12 cams
1201 engagement protrusion
13 Joint part in cylinder lock

Claims (4)

It is a thumb turn attached to the lock case box,
A thumb turn case (2) to be attached to the case box;
An adjustment ring (3) that is detachably connected to the thumb turn case (2);
A thumb turn body (4) inserted in the adjustment ring (3) and the thumb turn case (2) so as to freely advance and retract;
Elastic means (6) interposed between the adjusting ring (3) and the thumb-turn body (4) for urging the adjusting ring (3) and the thumb-turn body (4) in a direction repelling each other; ,
Locking means (7) for restricting the movement of the thumb turn body (4) to the side opposite to the case box,
The thumb turn body (4) is engageable with a cam provided in a case box provided at the tip of the thumb turn main body (4), and the position of the engaging protrusion is changed by rotating the cam by an arbitrary angle. Has a joint portion (402) formed in a shape that makes it impossible to engage with the cam, and a pin (404) that protrudes in a direction perpendicular to the longitudinal direction, and is in a normal stationary state. , The joint portion (402) is inserted into the adjustment ring (3) and the thumb turn case (2) so as to be movable back and forth in an arrangement not engaging with the cam.
The thumb turn case (2) includes a ring insertion portion (205) that can be inserted in the vicinity of the tip of the adjustment ring (3), a through hole (204) that can penetrate the thumb turn body (4), and an upper end thereof. A case side engagement portion (201) formed on the portion,
The adjustment ring (3) protrudes from the ring-side through hole (305) that can penetrate the thumb-turn body (4), and the thumb-turn body (4) that is connected to the ring-side through hole (305). A thumb turn comprising: a passage groove (306) through which a pin (404) can pass; and a ring side engagement portion (303) engageable with the case side engagement portion (201). The thumb turn according to claim 1, wherein a decorative ring (5) is detachably mounted on an outer periphery of the thumb turn case (2). The thumb turn according to claim 1 or 2, wherein a spring is used as the elastic body (6). The thumb-turn according to any one of claims 1 to 2, wherein an E-ring is used as the locking means (7).

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