JP2004190312A - Protection device of thumb-turn of door lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protection device of a thumb-turn of a door lock for crime prevention. <P>SOLUTION: The protection device of the thumb-turn of the door lock includes at least one or more first engagement sections, at least an inside cylindrical cover fitted to the thumb-turn so as to hold a predetermined position relatively in the direction of the axis to a door, at least one or more engaging groove sections and an outside cylindrical cover concentrically and slidably fitted to the inside cylindrical cover. When the outside cylindrical cover is pulled out to slide, the outside cylindrical cover is fixed with the inside cylindrical cover at a position to be pulled out by engaging the first engagement sections with the engaging groove sections, and a comparatively large axial clearance is set between a first opening section of the end section opposite side to the door of the outside cylindrical cover and a lock tab. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
[Industrial applications]
The present invention relates to a thumb lock protection device for a door lock, in which inner and outer cylindrical covers are fitted concentrically and slidably to prevent operation of a thumb turn by inserting a wire or the like from outside the door. An object of the present invention is to provide a thumb lock protection device for a door lock.
[0002]
[Prior art]
A thumb lock protection device for a door lock is a device designed to prevent a thief or the like from using a wire or other tool from outside the door to turn the thumb turn lock knob inside the door, that is, inside the room, to prevent unauthorized entry. is there.
[0003]
In a conventional door lock thumb-turn protection device, a thumb-turn cover made of a single member is attached to the thumb-turn so as to cover the periphery of the thumb-turn (for example, see Non-Patent Document 1).
[0004]
There are also devices that engage a pinned cap with a thumb-turn locking knob to secure an instrument with an extendable pin to a door. According to this device, the pin of the device is manually or remotely extended to fit into the pin of the cap, and the rotation of the thumb turn by a tool such as a wire is prevented (for example, see Non-Patent Document 2).
[0005]
[Non-patent document 1]
Rock Center Swa, "Rock Center Rakuten Ichiba", [online], October 2002, Rock Center Swa, [November 1, 2002 search], Internet <URL: http: // www.rakuten.co.jp/lock/449429/459080>
[Non-patent document 2]
Towa Shokai Co., Ltd., "Sum Stopper", [online], August 2002, Towa Shokai Co., Ltd., [Search November 1, 2002], Internet <URL: http: //www.thumbstopper. com / product / index.html>
[0006]
[Problems to be solved by the invention]
However, the above-described single-piece thumb-turn cover does not allow the axial height of the cover to be too large and the size of the opening to be too small in order to prevent a housekeeper from unlocking from the room. Therefore, it is possible for a thief to insert a wire from the outside of the door to the inside of the door to rotate the thumb turn, and there is a problem that a sufficient security effect cannot be obtained.
[0007]
Further, the above-described device including the cap having the pin and the instrument having the pin has a high crime prevention effect, but has a problem that the cost is high due to the complicated mechanism.
[0008]
[Means for Solving the Problems]
A thumb lock protection device for a door lock according to the present invention for solving the above-mentioned problems has at least one or more first engagement portions, and at least holds a predetermined position in an axial direction relatively to a door. And an outer cylindrical cover having at least one or more second engagement portions and being fitted concentrically and slidably with the inner cylindrical cover. When the outer tubular cover is pulled out and slid, the first engaging portion and the second engaging portion are engaged with each other, so that the outer tubular cover moves relative to the inner tubular cover. A relatively large axial separation distance is set between the first opening at the end of the outer cylindrical cover opposite to the door and the lock knob. I do.
[0009]
Preferably, the first engagement portion is elastically deformable in a substantially radial direction of the inner cylindrical cover, and the outer cylindrical cover further includes a pressing portion elastically deformable in a substantially radial direction thereof, When the pressing portion is deformed by pressing inward in the radial direction, the pressing portion comes into contact with the first engaging portion to elastically deform the first engaging portion substantially inward in the radial direction. The portion and the second engagement portion are disengaged from each other, so that the outer cylindrical cover can be pushed.
[0010]
Preferably, one of the outer tubular cover and the inner tubular cover further has one or more third engagement portions, and the outer tubular cover is closer to the door than the inner tubular cover. When the inner cylindrical cover is engaged with the inner cylindrical cover first engaging portion and the outer cylindrical cover third engaging portion, or when the outer cylindrical cover second engaging portion is engaged with the inner cylindrical tube. The outer cylindrical cover is locked to the pushed-in position with respect to the inner cylindrical cover by engagement with the third cylindrical cover engaging portion.
[0011]
Preferably, the inner cylindrical cover has an opening at the door side end formed with an inner peripheral protruding portion having a diameter smaller than a diameter of a thumb turn base portion of the door lock or a diameter of a thumb turn axially slidable member of the door lock. To have at least two or more divided members that are divided into substantially equal parts in the circumferential direction, and the plurality of divided members have each of the inner peripheral protrusions with the door and the thumb-turn base or the slidable member. The inner tubular cover is formed by being assembled while being sandwiched between the inner tubular covers.
[0012]
Preferably, each of the inner tubular cover and the outer tubular cover is substantially cylindrical.
Preferably, the outer cylindrical cover further includes a ring-shaped inner diameter adjuster detachably engaged with the first opening of the outer cylindrical cover, and the inner diameter of the ring-shaped inner diameter adjuster is the same as that of the outer cylindrical cover. It is smaller than the inner diameter of the first opening.
[0013]
Preferably, a lid is detachably engaged with the first opening of the outer cylindrical cover to substantially seal the first opening, and the lid has a fourth engagement portion. When the outer tubular cover is pushed and slid to lock the outer tubular cover at the pushing position, the fourth engagement portion engages with the thumb-turn lock knob. By manually rotating the lid, the lock knob is interlocked and rotated to allow the locking and unlocking of the lock, and the outer tubular cover is pulled out and slid, so that the outer tubular cover is When locked at the pull-out position, the engagement of the fourth engagement portion and the lock knob is released, and the locking / unlocking operation is not allowed regardless of the manual rotation of the lid.
[0014]
Further, the thumb lock protection device for a door lock according to the present invention for solving the above-mentioned problems has at least one or more first engagement portions so as to maintain a predetermined position in the axial direction relatively to the door. An outer tubular cover fitted to the thumb turn, and an inner tubular cover having at least one or more second engagement portions and being fitted concentrically and slidably to the outer tubular cover; When the inner cylindrical cover is slid in a direction away from the door with respect to the outer cylindrical cover, the first engagement portion and the second engagement portion are engaged, The inner tubular cover is locked at a drawn position with respect to the outer tubular cover.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
A first embodiment of a door lock thumb-turn protection device according to the present invention will be described with reference to FIGS.
[0016]
In FIG. 1, a thumb lock protection device 10 for a door lock generally includes an inner cylindrical cover 8 and an outer cylindrical cover 9, and the inner cylindrical cover 8 is at least relatively to the door 1. The outer tubular cover 9 is fitted to the inner tubular cover 8 concentrically and slidably so as to keep a predetermined position in the axial direction of the thumb turn 7A. Hereinafter, the details will be described.
[0017]
The thumb turn 7A shown in FIG. 1 is used when locking or unlocking one lock 2a attached to the door 1 from the inside of the door, that is, from the room. The door 1 is opened by operating the door handle 3 and unlocking the other lock 2b. The thumb turn 7A has a thumb turn base 5 and a lock knob 4 supported on the base. The thumb turn 7A is provided for adjusting the thickness of the door as required, and is slidable by a distance E in the axial direction and urged by the spring 15 (see FIG. 3) in the door direction. 6.
[0018]
As shown in FIG. 1, the inner cylindrical cover 8 includes two divided members 8A and 8B having substantially the same shape and divided into two substantially equal parts in the circumferential direction. The pair of semi-cylindrical divided members are assembled and formed by engaging the engagement claw 8i and the engagement claw receiver 8j provided respectively. In addition, the inner cylindrical cover 8 may be assembled and formed as two or more divided members which are equally divided in the circumferential direction.
[0019]
The inner cylindrical cover 8 is preferably substantially cylindrical, but may be another cylindrical shape having a polygonal cross section perpendicular to the axial direction. The inner cylindrical cover 8 may have an axial cutout that does not hinder the fitting of the inner cylindrical cover 8 and the outer cylindrical cover 9.
[0020]
A central opening 8l at the door-side end of the inner cylindrical cover 8 in which a pair of semi-cylindrical divided members is combined has a thumb turn base 5 (see FIG. 5) or an axially slidable member 6 (see FIG. 4). An inner peripheral projection 8k having a diameter smaller than the diameter is provided.
[0021]
The inner cylindrical cover 8 has a second opening 8c at an end opposite to the door. The inner diameter of the second opening 8c is preferably larger than the length of the lock knob 4 in the axis orthogonal direction.
[0022]
The inner cylindrical cover 8 is formed by cutting a pair of pressed arms 8e as a pair of first engaging portions that can be elastically deformed in a substantially radial direction of the inner cylindrical cover 8 in a peripheral portion 8b. The number of the pressed arms 8e may be one or three or more. The pressed arm 8e itself may be elastically deformable by being formed of a highly elastic elastic member such as rubber. The pressed arm 8e has a protrusion 8f that protrudes substantially radially outward, but may be a recess.
[0023]
The inner cylindrical cover 8 has a rib 8h protruding outward in a substantially radial direction on a peripheral portion 8b at an end opposite to the door. The rib 8h is preferably on an extension of the pressed arm 8e in the axial direction.
[0024]
It is preferable that the inner cylindrical cover 8 has an outer peripheral flat portion 8d which protrudes substantially in the radial direction and is parallel to the vertical surface in FIG. The outer peripheral flat portion 8d engages with the inner peripheral flat portion 9k of the outer cylindrical cover 9 as described later.
[0025]
The outer tubular cover 9 is preferably substantially cylindrical, but when the inner tubular cover 8 is another tubular shape, the axially orthogonal cross section has a polygonal shape or the like so as to fit into the inner tubular cover 8. Other cylindrical shapes may be used. Further, the outer cylindrical cover 9 may have an axial cutout that does not hinder the security effect of the protective device 10 for the thumb lock of the door lock.
[0026]
The outer cylindrical cover 9 has an opening 91 at the end on the door side. The diameter of the opening 9l is at least larger than the outer diameter of the peripheral portion 8b of the inner cylindrical cover 8, and the outer cylindrical cover 9 is fitted concentrically and slidably with the inner cylindrical cover 8. It is possible to
[0027]
The outer cylindrical cover 9 has a first central opening 9m at an end 9c opposite to the door. The inner diameter of the first central opening 9m is preferably larger than the length of the lock knob 4 in the direction perpendicular to the axis.
[0028]
The outer cylindrical cover 9 is formed by cutting a pair of pressing arms 9d which can be elastically deformed in a substantially radial direction at substantially symmetrical positions in a radial direction of a peripheral portion 9b. One or three or more pressing arms 9d may be provided. The pressing arm 9d may be elastically deformable by itself being formed of a highly elastic member such as rubber, and the pressing arm 9e protrudes outward and inward in a substantially radial direction (see FIGS. 1 and 2). It is preferable to have
[0029]
In FIG. 2, the outer cylindrical cover 9 has, on the inner peripheral surface thereof, a pair of ridges 9g extending in the axial direction on both sides of the pressing arm 9d. The number of the pair of protrusions 9g may be one or three or more. When the outer cylindrical cover 9 is fitted to the inner cylindrical cover 8, the protrusion 8f of the inner cylindrical cover 8 slides on a pair of protrusions 9g. Note that a chamfered portion 9j is provided at the door-side end of the ridge 9g so that the outer tubular cover 9 can be easily fitted to the inner tubular cover 8.
[0030]
Each projection 9g has on its upper surface an engagement groove 9h as a second engagement portion near the door side end and an engagement groove as a third engagement portion near the door opposite end 9c. It has a groove 9i. The outer cylindrical cover 9 does not necessarily need the protrusion 9g, and the door-side engaging groove 9h and the engaging groove 9i may be provided directly on the inner peripheral surface of the peripheral portion 9b of the outer cylindrical cover 9.
[0031]
Alternatively, the inner cylindrical cover 8 may have an engagement groove, and the door-side engagement groove 9 h of the outer cylindrical cover 9 may engage with the engagement groove of the inner cylindrical cover 8.
When the pressed arm 8e has the projection 8f, the door-side engagement groove 9h and the engagement groove 9i are preferably grooves to engage with the projection 8f. The inclination of the door-side engagement groove 9h is preferably provided at a relatively large inclination angle, and the inclination of the groove of the engagement groove 9i is preferably provided at a relatively small inclination angle. When the pressed arm 8e is a concave portion instead of the protruding portion 8f, the door-side engaging groove portions 9h and 9i are preferably convex portions to engage with the concave portion.
[0032]
The outer cylindrical cover 9 has a flat portion 9k on the inner peripheral surface of the peripheral portion 9b. The flat portion 9k of the outer tubular cover 9 engages with the outer flat portion 8d of the inner tubular cover 8 when the outer tubular cover 9 is fitted to the inner tubular cover 8, and the outer tubular cover 9 From rotating freely with respect to the inner cylindrical cover 8.
[0033]
In FIG. 1, the ring-shaped inner diameter adjuster 11 has a cylindrical portion 11 a whose inner diameter 11 b is smaller than the inner diameter of the first central opening 9 m of the outer cylindrical cover 9 along the opening. The outer diameter of the cylindrical portion 11a is substantially equal to the inner diameter of the first central opening 9m, and the ring-shaped inner diameter adjuster 11 can be detachably fitted into the first central opening 9m.
[0034]
8 to 15, the lid 12A is detachably engaged with the first central opening 9m of the outer cylindrical cover 9 to substantially seal the first central opening 9m. The lid 12A is preferably rotatably attached to the outer cylindrical cover 9. In this embodiment, the lid 12A has an outer peripheral portion 12A-a (see FIG. 9) extending in the axial direction near the door-side end, and the outer peripheral portion 12A-a of the lid 12A is ring-shaped. It can be fitted into the opening 13a of the tool 13 (see FIG. 8) (see FIG. 14). The outer peripheral portion 13b of the ring-shaped fastener 13 can be rotatably fitted into the first central opening 9m of the outer cylindrical cover 9. The lid 12A is held between the ring-shaped fastener 13 and the end 9c (peripheral edge of the first central opening 9m) of the outer cylindrical cover 9 opposite to the door. And formed. Thus, the lid 12A is rotatably held with respect to the outer cylindrical cover 9.
[0035]
The lid 12A has a fourth engaging portion 12A-c (see FIG. 9) in a cross section orthogonal to the door-side end axis. The fourth engagement portions 12A-c are engageable with the lock knob 4 of the thumb turn 7A. The lid 12A preferably has knobs 12A-d (see FIGS. 8 and 9) so that manual rotation is easy.
[0036]
In the present embodiment, the fourth engaging portion 12A-c is a groove (see FIG. 9) formed by the side walls 12A-b, but there are of course various variations. For example, as shown in FIGS. 10 and 11, the fourth engagement portion may be defined by a plurality of ribs 12 </ b> B-c that extend in the axial direction of the lid 12 </ b> B and radially extend substantially equally in the circumferential direction. Alternatively, as shown in FIGS. 12 and 13, the cover 12C may be defined by a plurality of pins 12C-c which extend in the axial direction of the lid 12C and are arranged at substantially equal intervals in the circumferential direction.
[0037]
Next, a method and an operation of attaching the thumb lock protection device 10 of the door lock to the thumb turn 7A will be described.
As shown in FIG. 1, the slidable member 6 of the thumb turn 7A is slid and held in a direction away from the door against a spring by a distance E so as to be axially separated from the door.
[0038]
Next, the pair of divided members 8A and 8B of the inner cylindrical cover 8 are fitted to the outer periphery of the thumb turn 7A while each inner peripheral protruding portion 8k is inserted between the door 1 and the slidable member 6. And the inner cylindrical cover 8 is formed. The slidable member 6 is slid and returned toward the door 1 by the spring 15 and pressed against the inwardly protruding portion 8k of the inner cylindrical cover 8, so that the inner peripheral protruding portion 8k is It is pressed and held in between and keeps a predetermined position in the axial direction relative to the door. As shown in FIG. 5, when the thumb turn 7B is of a type that does not have the slidable member 6, the pair of divided members 8A and 8B of the inner cylindrical cover 8 have the respective inner peripheral protruding portions 8k. It is sandwiched between the door 1 and the thumb turn base 5. In this case, the thumb turn base 5 is attached to the door 1 by screws 14.
[0039]
Next, the outer tubular cover 9 is fitted concentrically and slidably with the inner tubular cover 8 while being pushed in the door 1 direction.
When the outer cylindrical cover 9 is slid with respect to the inner cylindrical cover 8 in a direction approaching the door, the protrusion 8f of the inner cylindrical cover 8 is separated from the door of the outer cylindrical cover 9 as shown in FIG. The outer cylindrical cover 9 is engaged with the engaging groove 9i, and is locked at the pushing position (see FIG. 3) with respect to the inner cylindrical cover 8. When the inner cylindrical cover 8 has an engaging groove, the door-side engaging groove 9h of the outer cylindrical cover 9 and the engaging groove of the inner cylindrical cover 8 are engaged, and the outer cylindrical cover 9 is It is locked at the pushing position. When the outer cylindrical cover 9 is locked at the pushing position, the locking knob 4 projects from the first central opening 9m of the outer cylindrical cover 9 as shown in FIGS. Alternatively, the unlocking operation can be easily performed. However, as long as the operation is not hindered, the lock knob 4 does not have to protrude from the first central opening 9m (see FIG. 5). The flat portion 9k of the outer tubular cover 9 is engaged with the outer flat portion 8d of the inner tubular cover 8 to prevent the outer tubular cover 9 from freely rotating with respect to the inner tubular cover 8.
[0040]
Next, when the outer tubular cover 9 is pulled out and slid with respect to the inner tubular cover 8 in a direction away from the door, the projection 8f of the inner tubular cover 8 is separated from the door of the outer tubular cover 9. The engagement with the mating groove 9i (see FIG. 3) is released, the switching engagement with the door side engaging groove 9h is performed, and the outer cylindrical cover 9 is pulled out from the inner cylindrical cover 8 (see FIG. 4). Is locked. When the outer cylindrical cover 9 is pulled out to disengage the projection 8f and the engagement groove 9i separated from the door, the engagement release operation is performed because the inclination angle of the engagement groove 9i is relatively small. Is easily accomplished with relatively small forces. Further, even if the outer cylindrical cover 9 is further pulled out from the drawn position and slid, the pressing projection 9e of the pressing arm 9d of the outer cylindrical cover 9 contacts the rib 8h of the inner cylindrical cover 8, so that The tubular cover 9 does not easily fall off the inner tubular cover 8.
[0041]
When the outer tubular cover 9 is locked at the drawn-out position, as shown in FIGS. 4 and 6, a relatively large axial direction is provided between the first central opening 9m of the outer tubular cover 9 and the lock knob 4. Since the separation distance 1 is set, the lock knob 4 cannot be easily unlocked by rotating the lock knob 4 using a tool such as a wire, and the security effect can be improved. In addition, when the household member is indoors, the outer cylindrical cover 9 may be locked at the pushing position (see FIG. 3).
[0042]
When the outer cylindrical cover 9 is in the pulled-out position (see FIG. 4), since the inclination angle of the groove of the door-side engaging groove 9h is provided to be large, the outer cylindrical cover 9 is moved relative to the inner cylindrical cover 8. 4 does not release the engagement between the door-side engagement groove 9h and the projection 8f, and unless the following predetermined operation is performed, the outer cylindrical cover 9 is not used. Cannot be slid so as to be close to the axial direction.
[0043]
When the outer cylindrical cover 9 is locked at the drawn-out position (see FIG. 4), a method of releasing the engagement between the door-side engagement groove 9h and the projection 8f is as follows.
The pair of pressing arms 9d are sandwiched by, for example, the thumb and the index finger, and are simultaneously pressed and deformed inward in the radius. Then, the pressing protrusion 9e of the pressing arm 9d of the outer cylindrical cover 9 comes into contact with a predetermined portion of the pressed arm 8e of the inner cylindrical cover 8, and elastically deforms the pressed arm 8e substantially inward in the radial direction. . As a result, the engagement between the projection 8f of the pressed arm 8e and the door-side engagement groove 9h is released, and the outer tubular cover 9 is pressed in this state. Then, the outer tubular cover 9 is returned and slid from the state of FIG. 4 to the position of FIG. 3, and the projection 8f of the pressed arm 8e and the engagement groove 9i separated from the door are engaged to reach the pushing position. . Therefore, the thief cannot push and slide the outer tubular cover 9 only by pushing the outer tubular cover 9 from outside using a tool such as a wire, and a high crime prevention effect can be obtained. Of course, there are various variations as means for locking the outer cylindrical cover 9 at the pulled-out position, such as screwing the outer cylindrical cover 9 and the inner cylindrical cover 8 to lock the outer cylindrical cover 9 at the drawn-out position. Conceivable.
[0044]
Note that the door lock thumb-turn protection device 10 uses a wire inserted from outside the door due to the inner diameter of the first central opening 9m of the outer cylindrical cover 9 being significantly larger than the length of the lock knob 4 in the direction perpendicular to the axis. , The lock knob 4 may be operated. Therefore, in order to eliminate this possibility, a ring-shaped inner diameter adjuster 11 (see FIG. 1) may be further provided. Thus, since the inner diameter of the ring-shaped inner diameter adjuster 11 is smaller than the inner diameter of the first central opening 9m, the operation by the wire may be impossible.
[0045]
Next, FIGS. 14 and 15 show an embodiment in which the lid 12A (see FIG. 8 or FIG. 9) is attached to the first central opening 9m of the outer cylindrical cover 9, and FIGS. The same parts as those in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted.
[0046]
In FIG. 14, when the outer tubular cover 9 is slid with respect to the inner tubular cover 8 in the direction approaching the door, and the outer tubular cover 9 is locked at the pushed-in position, the fourth cover 12A of the lid 12A is closed. The four engagement portions 12A-c engage with the lock knob 4 of the thumb turn 7. Therefore, by manually rotating the lid 12A, the lock knob 4 is interlocked and rotated to allow the locking / unlocking operation of the lock 2a.
[0047]
On the other hand, when the outer tubular cover 9 is slid with respect to the inner tubular cover 8 in a direction away from the door, and the outer tubular cover 9 is locked at the drawn-out position (see FIG. 15), the fourth engagement is performed. The engagement between the joint 12A-c and the lock knob 4 is released. Thus, even if the lid 12A is rotated by a wire or the like inserted from outside the door, the locking / unlocking operation of the lock 2a cannot be performed.
[0048]
The pushing position is not defined by the engagement between the projection 8f of the pressed arm 8e and the engaging groove 9i separated from the door, and the pushing of the outer tubular cover 9 is simply performed so that the door-side end is moved. It may be stopped by abutting on the flange portion 8a of the inner cylindrical cover 8 or the inner surface of the door.
[0049]
Of course, as a second embodiment, the inner tubular cover 8 and the outer tubular cover 9 of the above embodiment are interchanged, that is, the outer tubular cover having at least one or more first engaging portions is provided on the door. The inner cylindrical cover having at least one or more second engagement portions is fitted slidably concentrically with respect to the outer cylindrical cover so as to be fitted to the thumb turn 7 so as to maintain a predetermined position in the axial direction relatively to the outer cylindrical cover. When the inner cylindrical cover is slid in the direction away from the door with respect to the outer cylindrical cover, the first engaging portion of the outer cylindrical cover and the second engaging portion of the inner cylindrical cover , The inner tubular cover is locked at the drawn-out position with respect to the outer tubular cover.
[0050]
In this case, the second engaging portion of the inner cylindrical cover is elastically deformable in a substantially radial direction of the inner cylindrical cover, and the outer cylindrical cover further has a pressing portion elastically deformable in a substantially radial direction. When the pressing portion is pressed and deformed inward in the radial direction, the pressing portion comes into contact with the second engaging portion of the inner cylindrical cover, and the second engaging portion is elastically deformed substantially inward in the radial direction. The engagement between the engagement portion and the second engagement portion is released, and a state in which the pushing operation of the inner cylindrical cover is allowed is allowed.
[0051]
Further, as a third embodiment, in the first embodiment, instead of sliding the outer cylindrical cover with respect to the inner cylindrical cover, the outer cylindrical cover and the inner cylindrical cover are screwed together, By rotating the outer tubular cover with respect to the inner tubular cover, a form in which the pushing or pulling-out operation of the outer tubular cover is permitted is also conceivable. Of course, a form in which the inner cylindrical cover and the outer cylindrical cover of the third embodiment are interchanged is also conceivable.
[0052]
[Effects of the present invention]
(1) According to the door lock thumb-turn protection device of the present invention, when the outer tubular cover is pulled out and slid and locked at the pulled-out position, the first end of the outer tubular cover opposite to the door is located at the first end. A relatively large axial separation distance is set between the opening and the lock knob. Therefore, it is possible to prevent a thief from entering the room easily by turning the thumb-turn lock knob on the indoor side by using a tool such as a wire from outside.
[0053]
In addition, since the present apparatus includes the inner cylindrical cover and the outer cylindrical cover, the mechanism is simple, and the manufacturing cost can be reduced.
(2) In order to push the outer cylindrical cover from the pulled-out position, the present device presses the pressing portion of the outer cylindrical cover inward in the radial direction, and the first engaging portion of the inner cylindrical cover and the outer cylindrical cover. The engagement of the second engaging portion of the cover must be released. Therefore, the thief cannot easily push and slide the outer cylindrical cover from outside using a tool such as a wire, and a high crime prevention effect can be obtained.
[0054]
(3) In this device, when the outer tubular cover is pushed and slid, the outer tubular cover is locked at the pushed position with respect to the inner tubular cover. Therefore, when a family member is indoors, the outer cylindrical cover is locked at the pushed-in position, thereby facilitating the locking or unlocking operation of the family member's lock.
[0055]
{Circle over (4)} The inner cylindrical cover is composed of at least two or more divided members whose inner cylindrical cover is substantially equally divided in the circumferential direction, and is combined to form the inner cylindrical cover. Therefore, the present device can be easily attached to the thumb-turn without having to disassemble the thumb-turn portion.
[0056]
(5) This device is easy to manufacture because the inner cylindrical cover and the outer cylindrical cover are each substantially cylindrical.
{Circle around (6)} The present device has a ring-shaped inner diameter adjuster whose inner diameter is smaller than the inner diameter of the first opening of the outer cylindrical cover. Therefore, when the inside diameter of the first opening of the outer cylindrical cover is significantly larger than the length of the lock knob in the direction perpendicular to the axis, it is possible to secure the security effect of the protection device for the thumb turn of the door lock.
[0057]
{Circle around (7)} The present device is configured such that when the outer cylindrical cover is locked at the pushed-in position by engaging the lid that substantially seals the first opening of the outer cylindrical cover with the first opening, By manually rotating the lid, the locking / unlocking operation of the lock is allowed, but when the outer cylindrical cover is locked at the drawn-out position, the locking / unlocking operation of the lock is not allowed.
[0058]
Since the first opening of the outer cylindrical cover is substantially sealed by the lid, when the outer cylindrical cover is locked at the pulled-out position, the lock knob of the thumb turn cannot be rotated, and a higher security effect is obtained. Can be Further, when the outer cylindrical cover is locked at the drawn-out position, it is possible to prevent the elderly with dementia from easily unlocking and wandering outside the room.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of an embodiment of a thumb lock protection device for a door lock according to the present invention, in which an inner cylindrical cover is sandwiched between a door and a thumb turn sliding member and is fitted to the thumb turn. It is.
FIG. 2 is a perspective view of an outer cylindrical cover of the apparatus of FIG.
FIG. 3 is a longitudinal sectional view of the device of FIG. 1 when an outer cylindrical cover is locked at a pushing position.
FIG. 4 is a vertical cross-sectional view of the device of FIG. 1 when the outer cylindrical cover is locked at a drawn-out position.
FIG. 5 shows an outer cylindrical member in the example of FIG. 1 in which the thumb-turn sliding member is not provided, and the inner cylindrical cover is sandwiched between the door and the thumb-turn base portion and is fitted to the thumb-turn. FIG. 4 is a longitudinal sectional view when the cover is locked at a drawn-out position.
FIG. 6 is a completed view of the device of FIGS. 1 and 5 when the outer tubular cover is locked in the extended position.
FIG. 7 is a completed view of the device of FIGS. 1 and 5 when the outer tubular cover is locked in the pushed-in position.
FIG. 8 is an exploded perspective view of the device of FIG. 1 when the device further has a lid.
FIG. 9 is a perspective view of the lid of FIG. 8;
FIG. 10 is a rear view of the lid of FIG. 8 having a fourth engagement portion formed of a rib.
FIG. 11 is a longitudinal sectional view taken along line 11 of the lid of FIG. 10;
FIG. 12 is a rear view of the cover of FIG. 8 having a fourth engagement portion formed of a pin.
FIG. 13 is a longitudinal sectional view taken along line 13 of the lid of FIG. 12;
FIG. 14 is a longitudinal sectional view of the device having the lid shown in FIGS. 8 and 9 when the outer cylindrical cover is locked at the pushing position.
FIG. 15 is a view corresponding to FIG. 14 and is a longitudinal sectional view when the outer cylindrical cover is locked at a drawn-out position.
[Explanation of symbols]
1. Door
2 ... tablets
3. Door handle
4 ... Lock knob
5 ... Samtern base
6 ... Axial slidable member for door thickness adjustment
7 ... Samturn
8 ... Inner cylindrical cover
9 ... Outer cylindrical cover
10. Protective device for door lock thumb-turn
11 ... Ring-shaped inner diameter adjuster
12A ... lid

Claims (8)

A thumb lock protection device (10) for a door lock, wherein the thumb turn (7) includes a thumb turn base (5), a lock knob (4) supported by the base (5), and a door thickness provided as necessary. A door lock thumb turn protection device (10) having an axially slidable member (6) for adjusting the height.
An inner cylindrical cover (8) having at least one or more first engagement portions (8e) and fitted to the thumb turn (7) so as to keep at least a predetermined position in the axial direction relative to the door;
An outer tubular cover (9) having at least one or more second engaging portions (9h) and fitted concentrically and slidably with the inner tubular cover (8); ,
When the outer tubular cover (9) is pulled out and slid, the first engaging portion (8e) and the second engaging portion (9h) are engaged to form the outer tubular cover (9). ) Is locked at the pulled-out position with respect to the inner cylindrical cover (8), and the first opening (9m) at the end of the outer cylindrical cover (9) opposite to the door and the lock knob (4). ), A relatively large axial separation is set,
A protection device for a thumb-turn of the door lock. The protection device (10) for a door lock thumb turn according to claim 1,
The first engagement portion (8e) is elastically deformable in a substantially radial direction of the inner cylindrical cover (8),
The outer cylindrical cover (9) further has a pressing portion (9d) that can be elastically deformed in a substantially radial direction thereof,
When the pressing portion (9d) is pressed and deformed inward in the radial direction, the pressing portion (9d) comes into contact with the first engaging portion (8e) and elastically deforms the first engaging portion (8e) substantially inward in the radial direction. At this time, the first engagement portion (8e) and the second engagement portion (9h) are disengaged from each other, and the door is brought into a state in which the pushing operation of the outer cylindrical cover (9) is allowed. Locking thumb turn protector. A thumb lock protection device (10) for a door lock according to claim 1 or 2,
One of the outer tubular cover (9) and the inner tubular cover (8) further has one or more third engagement portions,
When the outer cylindrical cover (9) is slid with respect to the inner cylindrical cover (8) in a direction approaching the door, the inner cylindrical cover first engagement portion (8e) and the outer cylindrical cover The outer cylindrical cover is engaged with the cover third engaging portion (9i) or the outer cylindrical cover second engaging portion (9h) and the inner cylindrical cover third engaging portion. (9) The thumb lock protection device for the door lock, wherein the door lock is locked at a pushed position with respect to the inner cylindrical cover (8). 4. The protection device (10) for a thumb lock of a door lock according to any one of claims 1 to 3,
The inner cylindrical cover (8) has an opening (81) at the door side end thereof having a diameter larger than the diameter of the thumb turn base (5) of the door lock or the thumb turn axially slidable member (6) of the door lock. Is composed of at least two or more divided members (8A, 8B) which are equally divided in the circumferential direction so as to have an inner peripheral projection (8k) having a small diameter.
The plurality of divided members (8A, 8B) are combined while sandwiching the respective inner peripheral protruding portions (8k) between the door and the thumb turn base (5) or the slidable member (6). The thumb lock protection device of the door lock, wherein the inner cylindrical cover (8) is formed. The protection device (10) for a thumb lock of a door lock according to any one of claims 1 to 4,
The protection device for a thumb turn of the door lock, wherein the inner cylindrical cover (8) and the outer cylindrical cover (9) are each substantially cylindrical. The thumb lock protection device (10) for a door lock according to any one of claims 1 to 5,
The device further includes a ring-shaped inner diameter adjuster (11) detachably engaged with the first opening (9m) of the outer cylindrical cover (9). A device for protecting the thumb lock of the door lock, wherein the inner diameter is smaller than the inner diameter of the first opening (9m) of the outer cylindrical cover (9). The thumb lock protection device (10) for a door lock according to any one of claims 1 to 6,
A lid (12A) that removably engages with the first opening (9m) of the outer cylindrical cover (9) and substantially closes the first opening (9m); The body (12A) has a fourth engagement portion (12A-c),
When the outer tubular cover (9) is pushed in and slid and the outer tubular cover (9) is locked at the pushed-in position, the fourth engagement portion (12A-c) is engaged with the thumb-turn. By engaging with the lock knob (4) and manually rotating the lid (12A), the lock knob (4) is interlockedly rotated to permit locking and unlocking of the lock,
When the outer tubular cover (9) is pulled out and slid, and the outer tubular cover (9) is locked at the drawn-out position, the fourth engagement portion (12A-c) and the lock knob are provided. The locking device of the door lock, wherein the engagement of (4) is released and the locking / unlocking operation is not allowed regardless of the manual rotation of the lid (12A). A thumb lock protection device for a door lock, wherein the thumb turn (7) has a thumb turn base (5), a lock knob (4) supported on the base (5), and a door thickness adjuster provided as required. A door lock thumb turn protection device having an axially slidable member (6);
An outer cylindrical cover having at least one or more first engagement portions and fitted to the thumb turn (7) so as to maintain a predetermined position in the axial direction relative to the door;
An inner cylindrical cover having at least one or more second engaging portions and being fitted concentrically and slidably with the outer cylindrical cover,
When the inner cylindrical cover is slid with respect to the outer cylindrical cover in a direction away from the door, the first engagement portion and the second engagement portion engage to form the inner cylindrical cover. The cover is locked in the withdrawn position with respect to the outer cylindrical cover,
A protection device for a thumb-turn of the door lock.

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