JP2010163839A - Latch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a latch device improving operating efficiency by minimizing the angle of rotation of a key needed to convert the latch device from a locking state to an unlocking state or from the unlocking state to the locking state. <P>SOLUTION: A latch member 30 is arranged in a latch case 20 in a manner of moving back and forth between a latch position P1 where the latch member projects from the latch case 20 for latching, and a non-latch position P2 where the latch member retreats into the latch case 20 for unlatching. The latch member 30 is moved forward to the latch position P1 by rotating a rotor 42, into which the key is inserted, in one direction, and the latch member 30 is moved back to the non-latch position P2 by rotating the rotor 42 in the opposite direction. After the latch member 30 is driven from the non-latch position P2 to the latch position P1 or after it is operated in an opposite way, the rotor 42 is urged to return to its initial position before the driving, by a coil spring arranged around the rotor 42. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

    The present invention relates to a latch device used for locking and unlocking a door with respect to a holding frame, for example, and more particularly to a latch device having an improved rotor for driving a latch drive member for advancing and retracting a latch member. Is.

  An example of a prior art latch device is shown in Patent Document 1. As shown in Patent Document 1, a latch device generally includes a latch case 1, a latch position (FIG. 1B) that is disposed in the latch case 1 and protrudes from the latch case 1, and is pulled into the latch case 1. The latch driving member includes a latch member 2 that moves forward and backward between the non-latching position (FIG. 1A) to be detached and unlatched and a rotor (not shown) that rotationally drives the latch driving member 5, and the rotor is rotated in one direction. Latch driving means for advancing the latch member 2 to the latch position via 5 and rotating the rotor in the other direction to retract the latch member 2 to the non-latching position; and lock means 10 for holding the latch member 2 in the latch position. I have.

  The rotor rotates through the key by inserting a key (not shown) into the key hole of the rotor. In this case, the rotor is rotated in one direction together with the key from the first position of the rotor corresponding to the non-latching position of the latch member. When the latch member is in the latch position, the rotor stops at that position (second position), and when the rotor is rotated in the opposite direction from the second position to bring the latch member into the non-latching position, the rotor is Return to the first position. The first position and the second position of the rotor are spaced approximately 90 degrees apart, so that to move the latch member between the latched position and the non-latched member, the rotor or key must be Since it has to rotate at a large angle of 90 degrees, there is a drawback that the operability of the latch device is low.

JP 2006-28764 A

  SUMMARY OF THE INVENTION A first problem to be solved by the present invention is to provide a latch device capable of improving the operability by reducing the rotation angle of the key by a class of magnitude in order to change the latch device from the locked state to the unlocked state. It is to provide.

  The second problem to be solved by the present invention is to improve the operability by reducing the rotation angle of the key to a small degree in order to change the latch device from the locked state to the unlocked state and from the unlocked state to the locked state. It is an object of the present invention to provide a latch device capable of improving the above.

  According to a first aspect of the present invention, there is provided a latch case between a latch position disposed in the latch case and protruding from the latch case and latched, and a non-latch position in which the latch case is pulled and unlatched. A latch member that advances and retreats, and a latch driving means that includes a rotor and rotates the rotor in one direction to advance the latch member to the latch position and rotate the rotor in the other direction to retract the latch member to the non-latching position; And a latching means for holding the latch member in the latch position. After the latch member is driven from the non-latch position to the latch position, the rotor is returned to the initial state, or from the latch position. Rotor urging means for urging the rotor to return to the initial state after being driven to the non-latching position is further provided. It is to provide a latch device, wherein the door.

  In the problem-solving means of the present invention, the advancing and retreating between the latch case, a latch position disposed in the latch case and protruding from the latch case and latched, and a non-latch position in which the latch case is drawn and unlatched is performed. A latch member that includes a rotor that rotates the rotor in one direction to advance the latch member to the latch position and rotates the rotor in the other direction to retract the latch member to the non-latching position. In a latch device comprising a drive means and a lock means for holding the latch member in the latch position, the rotor is returned to an initial state after the latch member is driven from the non-latching position to the latch position. And the rotor is returned to the initial state after being driven from the latched position to the non-latched position. It is to provide a latch device being characterized in that it further comprises a rotor urging means for urging.

    The latch drive means includes a latch drive member driven by a rotor, and the rotor is assembled so that the rotor can rotate relative to the latch drive member by a predetermined angle, or the rotor is a latch drive member. The latch drive member is assembled to the latch drive member so as to rotate together with the latch drive member, and the latch member has an engaging portion that engages with the latch drive member by the rotor biasing means in the non-latching position.

  In the problem solving means of the present invention, it is preferable that the rotor urging means comprises a winding spring having a locking portion disposed around the rotor and locked to the rotor.

  Thus, after the latch member is held in the latch position, the rotor is returned toward the initial position before the rotation in the latch position direction, or after the latch member is held in the non-latching position, the rotor is unlatched. When returning to the initial position before rotation in the position direction, the rotation angle of the key inserted into the rotor is small and the key operation can be simplified, so that the operability of the latch device can be improved. .

It is a front view of the latch apparatus by the 1st Embodiment of this invention. It is the II-II1 sectional view taken on the line of the latch device of FIG. It is the III-III sectional view taken on the line of the latch apparatus of FIG. 1 to 3 show a rotor side portion (grip) of the latch driving means of the latch device of FIG. 1 to FIG. 3, in which FIG. (A) is a front view thereof, and FIG. (B) is a longitudinal sectional view of FIG. FIG. 4C is a rear view, and FIG. 4D is a cross-sectional view taken along the line DD of FIG. FIGS. 1 to 3 sequentially show the unlocking operation of the latch driving means of the latch device, wherein FIG. 1 (A) is a front view of the latch driving means in a locked state, and FIGS. 1 (B) to (D) are the same figure. It is a front view which shows the displacement of each part from the state of (A) to an unlocked state. 6A is a cross-sectional view taken along line AA in FIG. 5C, and FIG. 6B is a cross-sectional view taken along line BB in FIG. 5A. FIGS. 1 to 3 sequentially show the locking operation of the latch driving means of the latch device. FIG. 1A is a front view of the latch driving means in an unlocked state, and FIGS. It is a front view which shows the displacement of each part from the state of (A) to a locked state. FIG. 1 to FIG. 3 show roller urging means during the unlocking operation of the latch device, wherein FIG. (A) is a front view thereof, FIG. (B) is a rear view thereof, and FIG. FIG. 5 is a cross-sectional view corresponding to FIG. FIGS. 1 to 3 show the roller urging means during the locking operation of the latch device, wherein FIG. 1 (A) is a front view thereof, FIG. 1 (B) is a rear view thereof, and FIG. It is a figure similar to FIG. 7 which shows locking operation of the latch apparatus by the 2nd Embodiment of this invention. It is a figure similar to FIG. 5 which shows unlocking operation of the latch apparatus of FIG. 12A is a cross-sectional view taken along line AA in FIG. 11A, and FIG. 12B is a cross-sectional view taken along line BB in FIG. 11A.

  The first embodiment of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 9 show a latch device 10 of the present invention, and FIGS. 1 to 3, FIG. 5 (A), FIG. The state of (D) indicates that the latch device 10 is in the latched state (latching position of the latch member described later), and FIGS. 5 (D) and 7 (A) show that the latch device 10 is in the non-latched state ( It is shown that the latch member is in a non-latching position (to be described later).

    As shown in FIGS. 1 to 3, the latch device 10 includes a substantially rectangular latch case 20 and a latch position P1 that is disposed in the latch case 20 and protrudes from the latch case 20 to be latched (FIG. 5A). 7D) and a non-latching position P2 (see FIGS. 5D and 7A) that is drawn into and disengaged from the latch case 20 and a latch member 30, and a rotor A latch driving means 40 that includes a rotor 42 and rotates the rotor 42 in one direction to advance the latch member 30 to the latch position P1, and rotates the rotor 42 in the other direction to retract the latch member 30 to the non-latching position P2. And a locking means 50 for holding the latch member 30 at the latch position P1.

  As shown in FIG. 1, the latch case 20 has two attachment screw through holes 22, and the attachment screws (not shown) pass through these attachment screw through holes 22 and put the latch case 20 into a door or the like (not shown). Fix it. The latch case 20 is fixed to the door so that the latch member 30 faces the latch member engagement hole of the holding frame that holds the door.

  The latch member 30 is slidably disposed on one wall plate surface in the latch case 20, and the latch case 20 includes a guide wall 24 for guiding the latch member 30, as shown in FIGS. 24 'and the latch member 30 is guided along these guide walls 24, 24'. One side surface of the latch member 30 has a protrusion 32 that engages in the recess 24R of the guide wall 24 and engages the opposite walls 24R1 and 24R2 of the recess 24R, and one wall 24R1 of the recess 24R is The protruding position of the latch member 30 is regulated (see FIGS. 5A and 7D), and the other wall 24R2 of the recess 24R regulates the retracted position of the latch member 30 (FIG. 5D, FIG. 7 (A)). Further, the latch member 30 has a notch 34 on the opposite side surface, and this notch 34 constitutes a part of a locking means 50 described later.

  The latch driving means 40 is composed of a cylinder lock 44 including a rotor 42 that functions as a lock body (see FIG. 4). The cylinder lock 44 holds the rotor 42 as shown in FIGS. A cylinder 44C is provided. The cylinder lock 44 is attached to the latch case 20 with the holding cylinder 44 </ b> C fixed to the latch case 20.

  The latch drive means 40 further includes a latch drive member (or drive cam) 46 that is rotationally driven by the rotor 42, and this latch drive member 46 is formed of the latch member 30 as shown in FIGS. 2, 3, and 6. The shaft portion 46S is disposed in the drive member placement portion 36 having a shape penetrating the plate thickness, and the shaft portion 46S is rotatably supported by the latch case 20 and attached to the latch case 20. The latch drive member 46 is disengaged from the drive piece 46D engaged with the engagement portion 36E of the drive member arrangement portion 36 of the latch member 30 and the drive member arrangement portion 36 of the latch member 30, and the inner surface of the latch member 30 (the latch case 20). And a lock release piece 46R extending on the surface not touching the wall. In FIG. 4, reference numeral 48 denotes a ball bullet type click mechanism that holds the rotor 42 in a predetermined position.

  The engagement portion 36E of the drive member arrangement portion 36 of the latch member 30 is engaged with the drive piece 46D when the latch drive member 46 rotates to drive the latch member 30 toward the latch position P1 or the non-latch position P2. When the latch member 30 is driven toward the latch position P1 in the process of pushing one or the other of the opposing walls of the mating portion 36E, the latch member 30 exceeds a predetermined protruding amount. 7C and 7D, the driving piece 46D is disengaged from the engaging portion 36E and allowed to rotate while sliding on the wall of the driving member arrangement portion 36, and the latch member 30 The latch drive member 46 is set to have a shape similar to an ellipse so as to form an escape portion 36I that does not interfere with the latch member 30 even if the latch drive member 46 advances to the latch position P1. In the illustrated form, the engaging portion 36 </ b> E is formed at a position corresponding to the protrusion 32.

  The locking means 50 includes a lock member 54 that is disposed outside the guide wall 24 ′ of the latch case 20 and is biased so as to pass through the guide wall 24 ′ by the spring 52 and engage with the notch 34 of the latch member 30. ing. The notch 34 of the latch member 30 is formed at a position facing the lock member 54 when the latch member 30 reaches the latch position P1. As shown in FIGS. 5A and 5B, the lock release piece 46 </ b> R of the latch drive member 46 has a rounded tip, and the round tip is inclined by the lock member 54 at the latch position P <b> 1 of the latch member 30. When the latch driving member 46 rotates from the latch position P1 to the non-latching position P2 of the latch member 30, the lock member 54 is retracted along the inclined surface 54S to release the lock. Acts as follows.

  In the latch device 10 of the present invention, after the latch member 30 is driven from the non-latching position P2 to the latching position P1, the rotor 42 of the latch driving means 40 is returned to the initial position (position to start driving to the latching position). Further, after the latch member 30 is driven from the latch position P1 to the non-latching position P2, the rotor 42 of the latch driving means 40 is urged so as to return to the initial position (position where driving to the non-latching position is started). Rotor urging means 60 is further provided. In the illustrated form, this initial position includes the first rotor rotation position when the rotor 42 reaches the latch position P1 of the latch member 30, and the second rotor rotation position when the rotor 42 reaches the non-latching position P2 of the latch member 30. Is an intermediate position. As will be described later, the angular interval between the first and second rotor rotational positions is approximately 90 degrees, and therefore, the angle between the initial position and the first rotor rotational position, and the initial position and the second rotor rotational position. The angle between them is approximately 45 degrees.

  In the first embodiment of the present invention, as shown in FIGS. 2 and 3, the rotor 42 of the latch drive means 40 rotates the latch drive member 46 toward the latch position P1 or the non-latch position P2. The coupling end 42E having a rectangular cross section of the rotor 42 is inserted into the latch drive member 46 and assembled to the latch drive member 46 so that the rotor 42 can rotate relative to the rotation direction by a predetermined angle.

  Two V-shaped engagement walls 46 </ b> W and 46 </ b> W ′ are formed on the inner periphery of the latch drive member 46 so that the rotor 42 rotates and drives the latch drive member 46 to engage with the coupling end having a rectangular cross section of the rotor 42. However, since these engaging walls 46W and 46W ′ are arranged alternately as shown in FIGS. 5 and 7, the rectangular coupling end 42E of the rotor 42 is formed by these two engaging walls 46W. , 46W ′, a relative rotation can be performed at a predetermined angle (approximately 45 degrees in the illustrated case).

  4, 8, and 9, the rotor urging means 60 is a winding spring having two locking portions 62E and 62E ′ disposed around the rotor 42 and locked to the rotor 42 at both ends. It consists of 62. As shown in FIGS. 2 and 4B, the winding spring 62 is held in a spring housing space 44CS provided on the back surface of the rotor through wall 44CW of the holding cylinder 44C. 4C and 4D, the rotor 42 has a substantially V-shaped notch 42N that forms a wall on which the two locking portions 62E and 62E ′ of the winding spring 62 are locked. .

  Next, the operation of the latch device 10 according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 5 shows an operation for changing the latch device 10 from the locked state to the unlocked state, and FIG. 7 shows an operation for changing the latch device 10 from the unlocked state to the locked state.

    First, the operation of changing from the locked state to the unlocked state will be described with reference to FIG. 5. In the locked state, as shown in FIG. 5 (A), the latch drive member 46 has the drive piece 46D from the engagement portion 36E. It disengages and engages with the arcuate wall of the drive member placement portion 36. When a key is inserted into the key insertion groove 44K of the cylinder lock 44 of FIGS. 1 and 4 and this key is rotated counterclockwise from the position of FIG. 5A, the rotor 42 which is the lock body of the cylinder lock 44 is also in the same direction. The lock release piece 46R of the latch drive member 46 pulls the lock member 54 of the lock means 50 against the spring 52, while the coupling end 42E of the rotor 42 and the engagement walls 46W, 46W of the latch drive member 46 are rotated. The latch driving member 46 is also rotated in the same direction via '. In the course of this rotation of the latch drive member 46, first, the drive piece 46D of the latch drive member 46 engages with the engagement portion 36E of the latch member 36 (see FIG. 5B), and the latch member 36 is latched into the latch case. 20 (see FIG. 5C). As shown in FIG. 8, the rotation of the latch driving member 46 winds the winding spring 62 so that the locking portion 62E ′ of the winding spring 62 approaches the locking portion 62E, so that the rotor 42 is returned in the clockwise direction. Is being energized. Therefore, when the hand holding the key is released, the rotor 42 is returned to the clockwise direction together with the key. As shown in FIG. 5D, the rotor 42 has a rectangular coupling end 42E having two V-shaped engagement walls. It automatically returns to the initial position (the same posture position as in FIG. 5A) that engages the other inclined surface of 46W and 46W ′.

    The operation of changing from the locked state to the unlocked state will be described with reference to FIG. 7. In the unlocked state, the latch drive member 46 is as shown in FIG. 7A (this is the same as FIG. 5D). As shown, the drive piece 46D is engaged with the engaging portion 36E. When a key is inserted into the key insertion groove 44K of the cylinder lock 44 of FIGS. 1 and 4 and this key is rotated clockwise from the position of FIG. 7A, the rotor 42 which is the lock body of the cylinder lock 44 is also in the same direction. The latch drive member 46 rotates in the same direction via the coupling end 42E of the rotor 42 and the V-shaped engagement walls 46W and 46W ′ of the latch drive member 46. In the course of this rotation of the latch drive member 46, the lock piece 50 is unlocked by the lock release piece 46, and first, the drive piece 46D of the latch drive member 46 is disengaged from the engagement portion 36E of the latch member 36. Although it moves, the latch member 30 is continuously pushed in the direction of the latch position through the wall of the drive member arrangement portion 36 (see FIG. 7C). As shown in FIG. 9, the rotation of the latch driving member 46 winds the winding spring 62 so that the locking portion 62E of the winding spring 62 approaches the locking portion 62E ′, so that the rotor 42 is returned in the counterclockwise direction. Is biased in the direction. Therefore, when the hand holding the key is released, the rotor 42 is returned counterclockwise together with the key. As shown in FIG. 7D, the rotor 42 has a rectangular coupling end 42E with two V-shaped engagements. It automatically returns to the initial position (the same posture position as FIG. 5A) that engages the other inclined surface of the walls 46W and 46W ′.

    In the latch device according to the first embodiment, as described above, after the latch member 30 is held at the latch position P1, the rotor 42 returns to the initial position before the rotation in the direction of the latch position P1. After the latch member 30 is held at the non-latching position P2, when the rotor 42 is returned toward the initial position before the rotation in the direction of the non-latching position P2, the rotor 42 does not return to the initial position and the latch position is reached. Since the rotation angle of the key inserted into the rotor 42 can be smaller than when rotating between a position corresponding to the non-latching position and a position corresponding to the non-latching position, the key operation can be simplified and the latch device 10 can be operated. Improve the operability.

  A latch device 10 according to a second embodiment of the present invention is shown in FIGS. 10 to 12. In the latch device 10 according to this embodiment, the cross-shaped coupling end 42E of the rotor 42 rotates integrally with the latch drive member 46. FIG. The latch drive member 46 is engaged with and engaged with the cross-shaped engaging groove 46G, and the drive piece 46D of the latch drive member 46 is located on the same plane as the lock release piece 46R and engages with the drive piece 46D. Then, a pin-like engagement portion 30P for driving the latch member 30 to the latch position is provided in the latch member 30, and a spring 38 for biasing the latch member 30 to the non-latching position P2 extends from the guide wall 24 at a right angle. Is the same as that of the latch device 10 according to the first embodiment except that it is disposed between the shoulder portion 30S of the latch member 30 and the same reference numerals as in the first embodiment. It is. Although not shown, the rotor 42 is driven to rotate toward the latch position P1 or the non-latch position P2 by a winding spring (not shown) similar to that of the first embodiment, and then corresponds to these positions. It returns to the middle of the position.

  In the operation of the latch device according to the second embodiment, the latch member 30 is driven to the latch position P1 via the engaging portion 36P by the driving piece 46D of the latch driving member 46, and the driving piece 46D is moved from the engaging portion 36P. Since it is substantially the same as the operation of the latch device according to the first embodiment except that the latch 38 is driven to the non-latching position P2 by the spring 38, detailed description thereof is omitted.

  According to the present invention, since the angular displacement of the rotor that rotates the rotor to the latch position or the non-latching position is small, the key operation is simple, and the operability of the latch device can be improved. Becomes higher.

DESCRIPTION OF SYMBOLS 10 Latching apparatus 20 Latch case 22 of substantially rectangular shape Screw through-holes 24, 24 'Guide wall 24R Recess 24R1, 24R2 of guide wall 24 Wall 30 opposite to recess 24R Latch member 30P Pin-like engagement part 30S Shoulder part 32 Projection part 34 Notch 36 Drive member arrangement part 36E Engagement part 36I Escape part 38 Spring 40 Latch drive means 42 Rotor 42E Joint end 42N Notch of substantially V shape 44 Cylinder lock 44C Holding cylinder 44CW Rotor through wall 44CS Spring storage space 46 Latch drive Member 46S Shaft 46D Drive piece 46R Unlocking piece 46W, 46W'V-shaped engagement wall 46G Cross-shaped engagement groove 48 Ball spring-type click mechanism 50 of rotor 42 Locking means 52 Spring 54 Lock member 54S Inclined surface 60 Rotor biasing Means 62 Winding springs 62E, 62E 'Two locking portions P1 Latch Position P2 Non-latching position

Claims (5)

A latch case, a latch member disposed in the latch case and protruding and retracted from the latch case, and a latch member that moves forward and backward between a latch position that is drawn into the latch case and unlatched, and a rotor And a latch driving means for rotating the rotor in one direction to advance the latch member to the latch position and rotating the rotor in the other direction to retract the latch member to the non-latching position; and And a locking device that holds the latch position, wherein the rotor returns to the initial state after the latch member is driven from the non-latch position to the latch position, or the non-latch position from the latch position. Rotor biasing means for biasing the rotor to return to the initial state after being driven to the latch position is further provided. Latch apparatus characterized by there. A latch case, a latch member disposed in the latch case and protruding and retracted from the latch case, and a latch member that moves forward and backward between a latch position that is drawn into the latch case and unlatched, and a rotor And a latch driving means for rotating the rotor in one direction to advance the latch member to the latch position and rotating the rotor in the other direction to retract the latch member to the non-latching position; and And a latch means for holding the latch position, wherein the latch member urges the rotor to return to an initial state after being driven from the non-latch position to the latch position and the latch position. Rotor urging means for urging the rotor to return to the initial state after being driven to the non-latching position from Latch apparatus characterized by comprising. 2. The latch device according to claim 1, wherein the latch driving means includes a latch driving member driven by the rotor, and the rotor can be rotated relative to the latch driving member by a predetermined angle. A latch device, which is assembled to 2. The latch device according to claim 1, wherein the latch driving means includes a latch driving member driven by the rotor, and the rotor rotates on the latch driving member so as to rotate together with the latch driving member. The latch device is assembled, and the latch member has an engaging portion that engages with the latch driving member by the rotor urging means at the non-latching position of the latch member. 4. The latch device according to claim 1, wherein the rotor urging means includes a winding spring that is disposed around the rotor and has a locking portion that is locked to the rotor. 5. A latch device characterized by that.

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