JP2007291808A - Thumb-turn device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thumb-turn device capable of simplifying the whole structure of the device by releasing the locking of a thumb-turn shaft by operation to a lock device side. <P>SOLUTION: This thumb-turn device has the thumb-turn shaft 2 inserted rotatably into a thumb-turn case 1, a joint 3 rotated and driven between a locking rotation position and an unlocking rotation position by the thumb-turn shaft 2 or a lock device to set a predetermined play rotation angle between the thumb-turn shaft 2 and the case, and an operation lever 7 provided with a stopper 5 engaged and disengaged with/from a stopper recessed part 4 of the thumb-turn case 1 at one end and connected with the thumb-turn shaft 2 to release the lock of the stopper 5 by operating an operation button 6. A cam face 8 for driving the operation lever 7 in the direction for releasing the lock of the stopper 5 accompanied by rotation within a play rotation angle of the joint 3 is formed at the operation lever 7 and the joint 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a thumb turn device.

  As a thumb turn device that prevents an unauthorized operation by requiring a pressing operation of an operation button to rotate the thumb turn shaft, a device described in Patent Document 1 is known. In this conventional example, the thumb turn device has a thumb turn tube (thum turn shaft) to which a button leg (operation lever) is connected, and a core shaft (joint portion) connected to the lock device. A stopper operated by the operation lever and a clamping plate operated by the joint portion are disposed at the boundary between the thumb turn shaft and the joint portion.

  In the locked state, the stopper is locked in the engaging groove (stopper recess) established in the fixed cylinder (thumbturn case) to restrict the rotation of the thumb-turn shaft. The stopper is unlocked by operating the operating lever. Thereafter, when the thumb turn shaft is rotated, the locking / unlocking operation of the locking device can be performed via the joint portion.

Also, when the locking device side is rotated using the cylinder lock in the locked state, the clamping plate rotates following the rotation of the joint portion, and then the stopper is driven in the unlocking direction to restrain the thumb turn shaft. The thumb turn shaft is also rotated.
JP 2005-42498 A

  However, the conventional example described above has a drawback that the mechanism for unlocking the thumb-turn shaft by the rotation of the joint portion side is complicated.

  The present invention has been made in order to eliminate the above-mentioned drawbacks, and has a simple structure, and the whole structure is simplified by allowing the thumb turn shaft to be unlocked by operating the lock device. The purpose is to provide a thumb-turn device.

According to the present invention, the object is
A thumb turn shaft 2 rotatably inserted into the thumb turn case 1;
A joint portion 3 which is rotationally driven between the locking and unlocking rotation positions by the thumb turn shaft 2 or the lock device, and has a predetermined idle rotation angle between the thumb turn shaft 2;
An operation lever 7 is provided at one end with a stopper 5 that engages and disengages with the stopper recess 4 of the thumb turn case 1 and is connected to the thumb turn shaft 2 and can be unlocked with the stopper 5 by operating the operation button portion 6. Have
A thumb turn device is provided in which the operation lever 7 and the joint portion 3 are formed with a cam surface 8 for driving the operation lever 7 in the unlocking direction of the stopper 5 as the joint portion 3 rotates within the free rotation angle. Is achieved.

  A stopper 5 is formed at one end of the operation lever 7 connected to the thumb turn shaft 2, and the rotation operation to the thumb turn shaft 2 is restricted when the stopper 5 is locked to the stopper recess 4 on the thumb turn case 1 side. The stopper 5 can be unlocked not only by operating the operation button 6 from the thumb turn shaft 2 side, that is, from the indoor side, but also by operating the locking device from the outdoor side, that is, by using a cylinder lock. This can be done by operating the device.

  When the joint part 3 is rotated from the outdoor side, first, the operation lever 7 is directly operated by the cam surface 8 of the joint part 3 within the free rotation angle with the thumb turn shaft 2 and moved to the stopper 5 release position side, The thumb turn shaft 2 follows the joint portion 3 and rotates. In the present invention in which the cam surface 8 of the operating lever 7 is directly opposed to the cam surface 8 of the joint portion 3 and the stopper 5 is released, the number of parts is reduced and the structure can be simplified.

  According to the present invention, since the thumb turn shaft can be unlocked by an operation to the lock device side with a simple structure, the entire structure can be simplified.

  As shown in FIG. 1, the thumb-turn device is formed by rotatably receiving a thumb-turn shaft 2 and a joint portion 3 in a thumb-turn case 1. The thumb turn case 1 is mounted with a thumb turn rose 14 for closing the thumb turn mounting hole 13a provided in the door 13. The thumb turn rose 14 is formed in a truncated cone shape so that the rear edge (the door surface side is referred to as “front” in this specification) abuts against the door surface even if the thickness of the door 13 varies. The spring is biased rearward by the compression spring 14a.

  The joint part 3 has a joint 15 whose one end is connected to a lock device (not shown), and a relay cylinder 16 which is housed in the thumb turn case 1 and is integrally connected to the joint 15 via a connecting pin 3a. The joint portion 3 is rotationally driven between the locking and unlocking rotation positions corresponding to the locking and unlocking rotation positions of the locking device. In this embodiment, the locking / unlocking operation angle of the locking device is 90 °. Correspondingly, the joint portion 3 has the locking rotation position shown in FIG. It is rotationally driven between the unlocked rotation position rotated 90 ° counterclockwise when viewed from the 1 (b) direction.

  A cam recess 16a is formed at the front end of the relay cylinder 16, and a cam projection 7a of the operation lever 7 described later enters. As shown in FIG. 2 (c), a curved concave cam surface 8 is formed on the inner wall surface of the cam recess 16a at the opposing position. A pushing surface 16 b is formed at the end of the cam surface 8.

  As shown in FIG. 2A, the thumb-turn shaft 2 has a shaft main body portion 17 in which a cylindrical portion 17b is extended from the rear end of a plate-like knob portion 17a formed at the front end portion. A head member 18 is connected to the front end of 17 using a screw 2a. As shown in FIG. 1B, with the head member 18 connected, the front end of the thumb turn shaft 2 has a single-letter shape when viewed from the front, and the locking / unlocking state of the locking device can be determined by the rotational position. . The head member 18 can be coated with a phosphorescent material or mixed during molding so that the position of the thumb turn shaft 2 can be known even at night.

  As shown in FIGS. 2 (a) and 2 (c), at the rear end of the cylindrical portion 17b of the thumb turn shaft 2, a pushing protrusion that enters the cam recess 16a of the joint portion 3 while being inserted into the thumb turn case 1 is used. A portion 17c is formed. The pushing projection 17c is formed at a position capable of interfering with the pushing surface 16b on the joint portion side when the thumb turn shaft 2 is rotated. As shown in FIG. 2C, an idle rotation angle (θ) is set between the pushing protrusion 17c and the pushing surface 16b, and either the thumb turn shaft 2 or the joint portion 3 is They contact each other when they are relatively rotated by an idle rotation angle (θ).

  Further, a rotational position correcting means 9 is configured between the thumb turn shaft 2 and the thumb turn case 1. As shown in FIG. 2 (d), the rotational position correcting means 9 includes a drive piece 11 accommodated in a piece accommodation hole 10 opened at a rotational boundary forming portion with the thumb turn shaft 2 of the thumb turn case 1, and the thumb turn shaft 2. And a flat surface portion 12 formed on the outer wall of the. The drive piece 11 can move forward and backward toward the rotation center of the thumb turn shaft 2, and is urged toward the thumb turn shaft 2 by a compression spring (biasing means 9a).

  The contact portion of the drive piece 11 with the thumb turn shaft 2 is formed by a flat surface, and the thumb turn shaft 2 is formed with a flat surface portion 12 that contacts the flat surface on the drive piece 11 side at the locking / unlocking rotation position. The flat surface portion 12 is disposed at a position where the thumb turn shaft 2 can be rotated by positioning the contact boundary with the drive piece 11 on the rotation boundary with the thumb turn case 1.

  Therefore, in this embodiment, as shown in FIG. 4 (d), when the thumb turn shaft 2 overstrokes beyond the locking / unlocking rotation position, the boundary of the flat surface portion 12 receives a pressing force from the drive piece 11. As a result, a rotational force in a direction returning to the locking / unlocking rotation position side (clockwise in FIG. 4D) is generated on the thumb-turn shaft 2, and the thumbturn shaft 2 returns to the locking / unlocking rotation position.

  Further, the thumb turn shaft 2 is provided with a lever receiving hole 2c having a rectangular shape in front view that branches into the cylindrical portion 17b by bifurcating the knob portion 17a. Two operating levers 7 are provided in the lever receiving hole 2c. Is housed.

  As shown in FIGS. 1 and 2, the operation lever 7 has an operation button portion 6 at one end and a stopper 5 at the other end, and an intermediate portion is rotatably connected to the thumb turn shaft 2 using a hinge pin 7b. The operation lever 7 having the same shape is connected in an X shape by a hinge pin 7b. In the connected state, the operation button portion 6 is exposed to the outside of the thumb turn case 1 on the side wall portion of the knob portion 17a, and the stopper 5 Is stored in the thumb turn case 1.

  A compression spring 7c is interposed between the operation button portions 6 and 6, and the operation lever 7 is urged in a direction in which the operation button portions 6 are separated from each other. As will be described later, the thumb turn shaft 2 is in the locking rotation position. In some cases, the operation button portion 6 protrudes from the side wall of the knob portion 17 a, and the stopper 5 is fitted in the stopper recess 4.

  As shown in FIGS. 1 (a) and 2 (b), the stopper 5 protrudes outward from the thumb turn case 1 and is provided with a stopper insertion opening 2d provided in the cylindrical portion 17b of the thumb turn shaft 2. Insert inside. The stopper 5 faces the stopper recess 4 formed in the thumb turn case 1 when the thumb turn shaft 2 is in the locking rotation position, and the stopper recess 4 in a state where the operation button portion 6 protrudes from the side wall of the knob 17a. To fit.

  In a state where the stopper 5 is fitted in the stopper recess 4, the thumb turn shaft 2 is restrained by the thumb turn case 1 and the rotation operation is restricted. From this state, as shown in FIG. 3A, the thumb turn shaft 2 resists the urging force of the compression spring 7c. When the operation button 6 is pressed, the stopper 5 is retracted from the stopper recess 4 as shown in FIG. 3C, and thereafter, the rotation operation to the thumb turn shaft 2 becomes possible.

  Further, a cam projection 7 a is formed at the rear end of the operation lever 7. As shown in FIGS. 1A and 2C, the cam protrusion 7 a protrudes outward from the thumb turn case 1 and corresponds to the cam recess 16 a of the joint 3. An arcuate cam surface 8 is formed at the tip of the cam projection 7a.

  Therefore, in this embodiment, as described above, in the locked state shown in FIG. 1, since the stopper 5 of the operating lever 7 is fitted in the stopper recess 4, the knob 17a is operated to operate the locking device. I can't do it. In this state, as shown in FIG. 3A, when the operation knob 17a is pushed down, the stopper 5 is detached from the stopper recess 4, and the cam surface 8 of the cam projection 7a is connected to the cam surface 8 on the joint 3 side. Get away from.

  When the thumb turn shaft 2 is rotated to the unlocking rotation position side in this state, as shown in FIG. 4A, first, only the thumb turn shaft 2 is rotated by an idle rotation angle (θ), and the pushing surface 16b is connected to the joint portion. It abuts against the pushing protrusion 17c on the third side. Thereafter, when the thumb turn shaft 2 is further rotated, the joint portion 3 is also rotated together with the thumb turn shaft 2. Since the operation angle by the thumb turn shaft 2 is lost by the idle rotation angle, the thumb turn shaft 2 shown in FIG. Therefore, the locking device shifts to the unlocked state at this position.

  As described above, at the overstroke position, as shown in FIG. 4D, the rotational position correcting means 9 exerts an urging force on the thumb turn shaft 2 toward the unlocked rotation position, and the hand is released from the thumb turn shaft 2. Then, as shown in FIG. 4C, the thumb turn shaft 2 automatically returns to the unlocking rotation position. In this state, since the knob portion 17a takes a posture corresponding to the unlocked state, the occupant can know that the user is currently unlocked only by looking at the position of the knob portion 17a.

  When the unlocking operation is performed by operating a cylinder lock (not shown) from the outdoor side in the locked state, the joint portion 3 side is first rotationally driven by the operation of the cylinder lock. When the joint part 3 is rotated to the unlocking rotation position side from the locked state shown in FIG. 2 (c), the joint part 3 within the set idle rotation angle rotates as shown in FIG. 5 (a). Furthermore, the cam surface 8 of the joint portion 3 presses the cam surface 8 of the cam protrusion 7a of the operation lever 7 to rotate the operation lever 7 in the approaching direction.

  As a result, the stopper 5 is detached from the stopper recess 4 as shown in FIG. 3C, and the restraint of the thumb turn shaft 2 is released. Thereafter, when the joint portion 3 is further rotated, as shown in FIG. 5B, the joint portion 3 having an operation angle of 90 ° is unlocked before the thumb turn shaft 2 reaches the unlocking rotation position. Reach position. The loss of the rotational operation angle of the thumb turn shaft 2 due to this idle rotation angle is eliminated by the rotational position correcting means 9, and the thumb turn shaft 2 is forcibly rotated to the unlocking rotational position side (see FIG. 5C).

  As described above, when the thumb turn shaft 2 is shifted to the unlocking rotation position, the stopper 5 is accommodated in the thumb turn shaft 2 from the stopper recess 4. Since the stopper recess 4 is formed only at a position where the thumb turn shaft 2 faces the stopper 5 at the locking rotation position, the stopper 5 accommodated in the thumb turn shaft 2 is in contact with the inner wall surface of the thumb turn case 1. As a result, as shown in FIG. 4C, the operation lever 7 is also in the approaching state, and the operation button portion 6 is also held in the pressed state.

  When the thumb turn shaft 2 is rotated clockwise from this unlocked state to shift to the locked state, first, as shown in FIG. After that, as shown in FIG. 6B, the joint portion 3 reaches the locking rotation position at the position where the overstroke has occurred. Thereafter, as shown in FIG. 6C, the overstroke of the thumb turn shaft 2 is corrected by the rotational position correcting means 9. In this state, the stopper 5 is fitted into the stopper recess 4 and the operation lever 7 is in a separated relationship, so that the operation button portion 6 protrudes from the side wall portion of the knob portion 17a.

  On the other hand, when the locking operation is performed from the outside, first, as shown in FIG. 7A, after only the joint portion 3 is rotated, the thumb turn shaft 2 is rotated as shown in FIG. When the stroke is insufficient, the process shifts to the locked state, and the rotational position correcting means 9 corrects the stroke loss of the thumb-turn shaft 2 (see FIG. 7C).

It is a figure which shows this invention, (a) is sectional drawing, (b) is a front view. 1A is a cross-sectional view taken along line 2A in FIG. 1A, FIG. 1B is a cross-sectional view taken along line 2B-2B in FIG. 1A, and FIG. FIG. 2D is a sectional view taken along line 2C-2C, and FIG. 2D is a sectional view taken along line 2D-2D in FIG. It is a figure which shows the state which canceled the stopper, (a) is a figure corresponding to Fig.1 (a), (b) is a figure corresponding to FIG.2 (c), (c) is equivalent to FIG.2 (b). FIG. It is a figure which shows the case where unlocking operation is carried out with a thumb turn axis | shaft, (a) is a figure which shows the time of rotation start, (b) is a figure which shows the unlocking completion state, (c) is the state which the rotation position forced means act | operated. FIG. It is a figure which shows the case where unlocking operation is performed from the joint part side, (a) is a figure which shows the time of rotation start, (b) is a figure which shows the unlocking completion state, (c) is the state which the rotation position forced means act | operated FIG. It is a figure which shows the case where locking operation is carried out with a thumb-turn axis | shaft, (a) is a figure which shows the time of rotation start, (b) is a figure which shows a locking completion state, (c) is a figure which shows the state which the rotation position forced means act | operated It is. It is a figure which shows the case where unlocking operation is carried out from the joint part side, (a) is a figure which shows the time of rotation start, (b) is a figure which shows a locking completion state, (c) is the state which the rotation position forced means act | operated. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thumb turn case 2 Thumb turn shaft 3 Joint part 4 Stopper recessed part 5 Stopper 6 Operation button part 7 Operation lever 8 Cam surface 9 Rotation position correction means 10 Piece accommodation hole 11 Drive piece 12 Plane part

Claims (5)

A thumb turn shaft that is rotatably inserted into the thumb turn case;
A joint portion that is rotationally driven between the locking and unlocking rotation positions by the thumb turn shaft or the lock device, and a predetermined idle rotation angle is set between the thumb turn shaft;
It has a stopper that engages with and disengages from the stopper recess of the thumb turn case at one end, is connected to the thumb turn shaft, and has an operation lever that can be unlocked with the stopper by operating the operation button.
A thumb turn device in which the operation lever and the joint portion are formed with a cam surface for driving the operation lever in the stopper release direction as the joint portion rotates within an idle rotation angle. The operation lever has an operation button portion protruding from the thumb turn shaft in a stopper locking posture at one end portion, a cam surface and a stopper at the other end portion, and an intermediate portion pivotally supported by the thumb turn shaft.
The thumb turn device according to claim 1, wherein the thumb turn device is biased toward the stopper locking posture. The stopper recess is provided only at the stopper facing position in the locking rotation position,
The thumb-turn device according to claim 1 or 2, wherein the thumb-turn device can be rotated to the thumb-turn shaft without operating the operation button portion at the unlocking rotation position.   The thumb turn device according to claim 1, 2 or 3, further comprising a rotational position correcting means for applying a rotational force in a deviation correcting direction due to an idle rotation angle between the thumb turn shaft and the joint portion to the thumb turn shaft. The rotational position correcting means includes
It has a drive piece that is housed in a piece housing hole that is opened in a rotational boundary forming portion with the thumb turn shaft of the thumb turn case, and that presses against the thumb turn shaft by a biasing means,
The thumb turn shaft contact portion of the drive piece is formed by a plane perpendicular to the advancing and retreating direction of the drive piece,
5. The thumb turn device according to claim 4, wherein the thumb turn shaft comes into contact with a thumb turn shaft contact portion of the drive piece at a locking / unlocking rotation position, and has a flat portion whose contact boundary coincides with a rotation boundary with the thumb turn case.

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