JP2006193951A - Crime prevention thumb-turn - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crime prevention thumb-turn capable of furthermore improving crime prevention nature by obtaining the crime prevention thumb-turn making a button impossible to easily hold in a depression even in a button depression type crime prevention thumb-turn. <P>SOLUTION: While a locking and unlocking rotary operation force can be inputted in a built in lock box wherein a locking mechanism projected from an indoor surface Ds of a door D is incorporated, a knob 21 having a rotational control means controlling the input of the locking and unlocking rotary operation force and buttons 45 and 45 projecting over the outer circumference of the knob 21 in a depressible manner to release the control of the rotary control means by depressing them with a finger and enabling the locking and unlocking rotary operation force to input into the lock box by the knob 21 are included, and a cover member 49 covering the buttons 45 and 45 in one sliding position and exposing them in the other sliding position is moveably provided to the knob 21. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a crime prevention thumb turn that prevents an unauthorized input of an unlocking operation force from being applied to a lock box by restricting rotation of a knob protruded from an indoor surface of a door.

  A lock box is provided at the entrance door provided in an apartment or house, and the lock box has a locking / unlocking mechanism that locks / unlocks the door by engaging / disengaging the dead bolt that has been advanced / retracted from / from the door mouth. Built-in. The lock box is locked and unlocked by inputting a locking / unlocking operation force by a cylinder lock from the outdoor side or a thumb-turning / unlocking operation force by a thumb turn from the indoor side. That is, the operation by the key lock of the cylinder lock is required from the outdoor side, while the lock operation can be easily performed by the rotation operation of only the knob without using the key lock from the indoor side.

  This type of thumb turn has a plate-like knob that protrudes perpendicularly to the indoor surface side of the door, as disclosed in Patent Document 1 below. This knob is connected to the locking / unlocking mechanism of the lock box via the thumb turn shaft. Therefore, from the indoor side, by picking this knob with a finger and rotating it forward and backward, the rotational operation force is transmitted directly to the lock box via the thumb turn shaft, and the dead bolt is advanced and retracted by the locking / unlocking mechanism. Can be locked and unlocked.

  However, in recent years, there has been an increase in unauthorized unlocking that unlocks locking devices by inserting a rod or wire from a small hole opened by a post port or a machine tool, locking it to a thumb turn that is easy to rotate, and rotating it. Yes.

For example, there is a security cover for thumb turn disclosed in the following Patent Document 2 which prevents the thumb turn from being locked and rotated. This thumb-turn security cover includes an attachment portion and a main body portion. The attachment portion can easily rotate the thumb turn while attached to the thumb turn. Further, the main body portion has a locking portion that can be locked to the mounting portion, and can idle with respect to the mounting portion via the locking portion. According to the security cover for the thumb turn, the locking of the locking part is released, the main body part is removed from the mounting part, the thumb turn with the mounting part attached is rotated, and the locking and unlocking operation becomes possible. By attaching the main body part to the attachment part, the main body part was idled, making it difficult to perform unauthorized unlocking, so-called thumb turn rotation, which hooks a wire etc. or pushes it with a stick, and was able to improve crime prevention .
Japanese Examined Patent Publication No. 2-15715 (Fig. 1b, Fig. 1c) Japanese Utility Model Publication No. 4-40362

The above-mentioned conventional security cover, when put on an existing thumb turn, is originally an oval shape, so the thumb turn locked or unlocked state that is visible depending on its rotational position becomes invisible, and erroneous operation is likely to occur. Decreased sex. In addition, because it is composed of a separating member for the thumb turn to be rotatable and the main body that is idled and detachable with respect to this mounting, the storage management of the detached main body becomes complicated, There was also a risk of losing the main body. Therefore, it is possible to prevent illegal unlocking of thumb turn picking by hooking or pushing the inserted wire or bar etc. to the pick, as well as a button press type that can prevent complicated storage management and loss due to comprising a separating member A security thumb turn was proposed.
The button-pressing type crime prevention thumb turn is provided with a pushable button protruding on a flat knob, and when this button is pressed, the rotation control of the knob is released and the locking / unlocking operation force for the locking / unlocking mechanism of the lock box is released. Input is possible. Therefore, in order to turn the knob, it must be rotated while pressing the button, making it difficult to perform unauthorized unlocking by inserting an illegal jig such as a wire or a bar into the door indoors, so-called thumb turn. It was possible to improve crime prevention. In addition to this, complicated storage management and loss can be prevented, and the locked and unlocked state can be easily visually recognized from the vertical and horizontal postures of the knob as in a general thumb turn.

  However, in the above-described button-pressing type crime prevention thumb turn, if the turning force is applied to the thumb turn at the same time as the button is pushed, the button may remain pressed due to play of the internal mechanism. This is the same phenomenon as when picking is performed. Therefore, in anticipation that such a phenomenon may occur, even if it is a button-pressing type crime prevention thumb turn with two front and back buttons, for example, the button on one side is pressed with a stick etc. By applying turning force, one button is held in a pressed state, and then the thumb turn is improperly unlocked by applying rotational force to the thumb turn while pressing the button on the other side with another stick etc. I was worried about it.

  The present invention has been made in view of the above situation, and provides a crime prevention thumb turn in which a button cannot be easily held down even in a button press type crime prevention thumb turn, and therefore aims to further improve crime prevention. To do.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The crime prevention thumb turn 100 according to claim 1 of the present invention allows the locking / unlocking rotation operating force to be input to the lock box protruding from the indoor surface Ds of the door D and incorporating the locking mechanism, while the locking / unlocking rotating operation force is input. A knob 21 provided with rotation restricting means for restricting
A button that protrudes on the outer periphery of the knob 21 and is pressed with a finger so as to release the restriction of the rotation restricting means and allow the knob 21 to input a locking / unlocking rotation operation force to the lock box. 45, 45,
The knob 21 is movably provided with a cover member 49 that covers and hides the buttons 45 and 45 at one sliding position and exposes the buttons 45 and 45 at the other sliding position. .

  In this crime prevention thumb turn 100, the buttons 45, 45 are covered by the cover member 49, and before the buttons 45, 45 are pressed, it is necessary to first move the cover member 49 to expose the buttons 45, 45. Therefore, in addition to pressing the button, an exposure operation for the buttons 45 and 45 is required, and an unauthorized unlocking operation using a bar or a wire becomes more difficult to perform. As described above, the unauthorized unlocking can be suppressed by taking more time and extending the required time.

  The crime prevention thumb turn 100 according to claim 2, wherein an exposure start end of the buttons 45, 45 starting to be exposed by sliding of the cover member 49 is formed by an end face 53 perpendicular to the moving direction of the cover member 49. Features.

  In this crime prevention thumb turn 100, even if a thin rod or wire tip is inserted between the cover member 49 and the buttons 45, 45, the tip only touches the vertical end surface 53 of the button exposure start end, and the hook is not caught. Absent. For this reason, it is not possible to apply a force in the button pressing direction by inserting a thin bar or the like into the gap between the buttons 45 and 45 and the cover member 49.

  The crime prevention thumb turn 100 according to claim 3 is provided with a biasing means for biasing and arranging the cover member 49 to one sliding position that covers the buttons 45, 45 between the knob 21 and the cover member 49. It is provided.

  In the security thumb turn 100, the cover member 49 is urged to one sliding position by the urging means, and the cover member 49 is held at a position covering the buttons 45, 45. Therefore, even if the cover member 49 is moved to expose the buttons 45, 45, in order to press the buttons 45, 45, the cover member 49 must be kept in the button exposure position, and further operation is required. This makes it more difficult to perform an unauthorized unlocking operation using a bar or wire.

  According to the crime prevention thumb turn according to the first aspect of the present invention, the rotation of the rotation restricting means is released by pushing the outer periphery of the knob so that it can be pushed down and pressed by a finger, and the lock is rotated into the lock box by the knob. In the push-down type crime prevention thumb turn equipped with a button that allows input of operation force, the cover member that covers and hides the button at one sliding position and exposes the button at the other sliding position can be freely picked Since it is provided, the button can be covered with the cover member, and in order to operate the button illegally, the cover member must first be moved to expose the button. In addition to pressing the button, the button is further exposed. Therefore, it is possible to make it more difficult to perform an unauthorized unlocking operation using a bar or a wire. As a result, the crime prevention property in the button press type crime prevention thumb turn can be further improved.

  According to the crime prevention thumb turn of claim 2, since the exposure start end of the button which begins to be exposed by sliding of the cover member is formed by the end surface perpendicular to the moving direction of the cover member, the tip of the thin rod or wire is temporarily covered Even if it is inserted between the button and the button, it is impossible to apply a pressing force to the button, and the crime prevention property can be improved.

  According to the crime prevention thumb turn according to claim 3, since the biasing means for biasing the cover member to the one sliding position that covers the button is provided between the knob and the cover member, the cover member is temporarily moved. Even if the button is exposed, to press the button, the cover member must continue to be held against the biasing force. Thus, it is possible to make it difficult to perform an unauthorized operation using a phenomenon similar to so-called picking for unlocking the thumb turn by holding the button in a pressed state.

Hereinafter, a preferred embodiment of a security thumb turn according to the present invention will be described in detail with reference to the drawings.
1 is a longitudinal sectional view of a security thumb turn according to the present invention, FIG. 2 is an external perspective view of the security thumb turn shown in FIG. 1, FIG. 3 is a longitudinal sectional view of the security thumb turn with the cover member moved, and FIG. 3 is an external perspective view, and FIG. 5 is a longitudinal sectional view of a security thumb turn in a state where a button is pressed.
The door D to which the security thumb turn 100 according to the present embodiment is attached is provided with a lock box (not shown). The lock box has a latch bolt, a dead bolt, and a locking mechanism (not shown) that moves these back and forth from a decorative plate provided at the mouth of the door D. The dead bolt of the lock box rotates the cylinder lock provided on the outdoor surface of the door D with a key (key) or the thumb turn knob (hereinafter simply referred to as “knob”) 21 provided on the indoor surface Ds of the door D. By moving, it is possible to advance and retreat from the mouth of the door D.

  A fixed cylinder 23 is fixed to the door D or the lock box. A pair of fixing portions 25, 25 project from the outer periphery on one end side in the axial direction of the fixing cylinder 23, and the fixing portions 25, 25 have fixing holes 27. The fixed cylinder 23 is fixed to a lock box provided in the door D through the fixing hole 27.

  A spacer ring 29 is extrapolated at the tip of the fixed cylinder 23. A decorative tube 33 having a central hole 31 is placed on and fixed to the outer periphery of the spacer ring 29. A conical decorative ring 35 having a flat tip is externally mounted on the outer peripheral side tip of the decorative tube 33. The rear end of the decorative ring 35 is pressed against the indoor surface Ds of the door D by the urging force of the spring 37 disposed between the bent portion 35 a at the rear end and the rear end surface of the decorative cylinder 33.

  A core cylinder (not shown) is rotatably provided inside the fixed cylinder 23, and a connecting shaft 39 having a cross-shaped cross section projects from one end side in the axial direction. The connecting shaft 39 is inserted into a lock box (not shown). Connected to the output shaft. A knob rod 41 to which the knob 21 is attached is rotatably provided inside the distal end side of the fixed cylinder 23. The knob 41 supports a lever 43 that is a constituent member of the rotation restricting means so as to be swingable, and transmits a rotating operation force from the knob 41 to the connecting shaft 39. That is, the knob 21 can input the locking / unlocking rotation operation force to the lock box incorporating the locking mechanism, while the lever 43 or the like can restrict the input of the locking / unlocking rotation operation force.

  The knob 21 is provided with a pair of buttons 45 that can be pressed on the front and back. The buttons 45, 45 are urged in the protruding direction by the compression spring 47 and protrude from the knob 41. The knob 21 operates the levers 43 and 43 when the buttons 45 and 45 are pressed with fingers. As a result, the restriction of the rotation restricting means comprising the levers 43, 43, etc. is released, the knob 21 is rotatable, and the locking / unlocking rotation operating force is input to the lock box.

  A cover member 49 that covers the buttons 45, 45 is provided on the knob 41 of the knob 21 so as to be movable in the axial direction of the knob 41. The cover member 49 is formed in a substantially conical shape having the door D side as a small diameter side. A pair of window portions 51, 51 are provided on the inclined side surface of the cover member 49, and the window portions 51, 51 can expose the buttons 45, 45. The cover member 49 covers and hides the buttons 45, 45 at one sliding position shown in FIGS. 1 and 2, and exposes the buttons 45, 45 at the other sliding position shown in FIGS. In the present embodiment, the cover member 49 does not rotate with respect to the knob 41. Thereby, the window parts 51 and 51 are prevented from being displaced in the circumferential direction with respect to the buttons 45 and 45. The cover member 49 may be provided to be rotatable with respect to the knob 41.

  When the cover member 49 is moved to the other sliding position, the exposure start ends of the buttons 45 and 45 start to be exposed. Here, the exposure start end of each of the buttons 45 and 45 is formed by an end face 53 perpendicular to the moving direction of the cover member 49. By adopting such a shape of the buttons 45, 45, even if a thin rod or wire tip is inserted between the cover member 49 and the button 45, 45, the tip of the button exposure start end is a vertical end face. Only abuts on 53, there is no catch. Therefore, according to the crime prevention thumb turn 100, since the exposure start ends of the buttons 45, 45 that start to be exposed by the sliding of the cover member 49 are formed by the vertical end surface 53, the thin rod or the wire tip is temporarily connected to the cover member 49. Even if it inserts between the buttons 45 and 45, the force of the direction pressed with respect to the buttons 45 and 45 cannot be applied, and crime prevention can be improved.

  In the crime prevention thumb turn 100, it is preferable to provide a biasing means (not shown) between the knob 21 and the cover member 49 so that the cover member 49 is biased and arranged at one sliding position that covers the buttons 45, 45. . Examples of the urging means include a compression coil spring and a tension coil spring disposed between the knob 21 and the cover member 49. By providing the urging means in this way, the cover member 49 is urged to one sliding position by the urging means, and the cover member 49 is held at a position covering the buttons 45 and 45. Therefore, even if the cover member 49 is moved to expose the buttons 45, 45, in order to press the buttons 45, 45, the cover member 49 must be kept in the button exposure position, and one operation is required. Increasingly, this operation becomes necessary, and it becomes more difficult to perform an unauthorized unlocking operation using a bar or a wire.

Next, the operation of the security thumb turn 100 configured as described above will be described.
As shown in FIGS. 1 and 2, the security thumb turn 100 is arranged at one sliding position by the urging means and covers the buttons 45 and 45 in the normal state. Therefore, since the buttons 45 and 45 cannot be pressed, the rotation restricting means cannot be released, and the knob 21 cannot be rotated. This prevents unauthorized unlocking from the locked state.

  In order to release the locked state by regular unlocking, first, as shown in FIGS. 3 and 4, the cover member 49 is pulled forward, and the cover member 49 is moved to the other sliding position. Move against. When the cover member 49 is moved to the other sliding position, the buttons 45 and 45 are exposed from the window portions 51 and 51 of the cover member 49.

  If the buttons 45 and 45 are exposed from the window parts 51 and 51, as shown in FIG. 5, a pair of button 45 and 45 will be pushed down with a finger | toe, with the cover member 49 being pulled. Thereby, the restriction | limiting of a rotation control means is cancelled | released and the knob 21 will be in the state which can rotate. In this state, that is, in a state where the cover member 49 is pulled and the buttons 45 and 45 are pressed, the knob 21 is rotated. As a result, the connecting shaft 39 is rotated together with the knob 41, a rotational operation force is input to the lock box, and the lock box is unlocked. At this time, the finger is operated by pulling the cover member 49 with, for example, the index finger and the thumb, and simultaneously pressing the exposed buttons 45 and 45 with these fingers and rotating the knob 21. Alternatively, using the left and right hands, the cover member 49 is pulled on the one hand, the exposed buttons 45 and 45 are simultaneously pressed on the other hand, and the knob 21 is rotated.

  As described above, in the security thumb turn 100, the buttons 45 and 45 are covered with the cover member 49, and before the buttons 45 and 45 are pressed, the cover member 49 is first slid and moved to expose the buttons 45 and 45. Is required. Therefore, in addition to pressing the button, an exposure operation for the buttons 45 and 45 is required, and an unauthorized unlocking operation using a bar or a wire becomes more difficult to perform. As described above, the unauthorized unlocking can be suppressed by taking more time and extending the required time.

  According to the security thumb turn 100, the knob 21 protrudes on the outer periphery of the knob 21 and is pressed with a finger to release the restriction of the rotation restricting means and to input the locking / unlocking rotation operation force to the lock box by the knob 21. In the button-pressing type crime prevention thumb turn having the buttons 45 and 45 to be enabled, the cover member 49 that covers and hides the buttons 45 and 45 at one sliding position and exposes the buttons 45 and 45 at the other sliding position is moved. Since the knob 45 is freely provided, the buttons 45 and 45 can be covered with the cover member 49. In order to operate the buttons 45 and 45 in an unauthorized manner, the cover member 49 is first moved to expose the buttons 45 and 45. In addition to pressing the button, one operation for exposing the buttons 45 and 45 is necessary, making it more difficult to perform an unauthorized unlocking operation using a bar or wire. It can be. As a result, the crime prevention property in the button press type crime prevention thumb turn can be further improved.

  Further, since the biasing means for biasing the cover member 49 to the one sliding position that covers the buttons 45, 45 is provided between the knob 21 and the cover member 49, the cover member 49 is temporarily moved. Even when the buttons 45, 45 are exposed, the cover member 49 must be held against the urging force in order to press the buttons 45, 45. It is possible to make it difficult to perform an unauthorized operation using a phenomenon similar to so-called picking for unlocking the thumb turn by applying a rotational force and holding the buttons 45 and 45 in a pressed state by play of the internal mechanism.

  In the above embodiment, the cover member 49 is moved (pulled) in the axial direction of the knob 41 to be moved to one sliding position or the other sliding position to cover the buttons 45 and 45. Although the case where it is concealed or exposed has been described as an example, the crime prevention thumb turn according to the present invention may expose the buttons 45 and 45 according to other movement forms. As this movement form, for example, a movement of rotating the cover member 49 around the axis line or a movement of pushing in the axial direction can be mentioned.

It is a longitudinal cross-sectional view of the crime prevention thumb turn which concerns on this invention. It is an external appearance perspective view of the crime prevention thumb turn shown in FIG. It is a longitudinal cross-sectional view of the crime prevention thumb turn in the state where the cover member was moved. FIG. 4 is an external perspective view of FIG. 3. It is a longitudinal cross-sectional view of the crime prevention thumb turn in the state where the button was pressed.

Explanation of symbols

21 ... Pick 45,45 ... Button 49 ... Cover member 53 ... Vertical end surface 100 ... Security thumb turn D ... Door Ds ... Indoor

Claims (3)

A knob provided with a rotation restricting means for restricting the input of the locking / unlocking rotation operation force while allowing the locking / unlocking rotation operation force to be input to a lock box protruding from the indoor surface of the door and incorporating a locking mechanism;
A button that protrudes on the outer periphery of the knob and is pressed with a finger so as to release the restriction of the rotation restricting means and allow the input of the locking / unlocking rotation operating force to the lock box by the knob. Equipped,
A crime prevention thumb turn characterized in that the knob is provided with a cover member that covers and hides the button at one sliding position and exposes the button at the other sliding position.   2. The crime prevention thumb turn according to claim 1, wherein an exposure start end of the button which starts to be exposed by sliding of the cover member is formed by an end face perpendicular to a moving direction of the cover member.   The crime prevention device according to claim 1 or 2, wherein a biasing means is provided between the knob and the cover member for biasing the cover member to one sliding position that covers the button. Sam turn.

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