JP2005061200A - Crime prevention thumb-turn - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that unlocking is conducted comparatively easily by directly turn a thumb-turn provided on the interior side by inserting a wire, a tool or the like from a gap of a door, a door scope or from a slot in a mailbox, since the form of a knob part of the thumb-turn used as a door lock is flat. <P>SOLUTION: An outer periphery of the thumb-turn is formed to be round and its surface is made to be smooth so that it may not be turned by the wire, the tool or the like from the outside. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

Detailed Description of the Invention

  The present invention relates to a saturn shape used before a door lock.

  A thumb turn used in a conventional door lock (main lock, lever handle lock, etc.) has a shape close to a rectangle as shown in FIG.

Problems to be solved by the invention

  In recent years, as a new technique for unauthorized unlocking, there are many techniques for illegally unlocking by inserting a wire or a tool from the door gap or door view or post mouth and turning the indoor thumb turn directly. The thumb-turn shape is close to a rectangle, enabling unauthorized unlocking. For this reason, the thumb turn is made circular and it is almost impossible to turn the thumb turn for unauthorized unlocking.

Means for solving the problem

In order to solve the above problems, the inventions of claim 1 and claim 2 insert a wire or a tool by making the thumb turn shape inside the door lock chamber into a cylindrical shape and finishing the outer peripheral surface in a smooth state. It is characterized by making the thumb turn almost impossible.
The invention of claim 3 has a structure that can be easily attached from the outside by retrofitting to the door lock thumb turn in use.
Further, the invention of claim 4 is to increase the certainty of locking by providing a display mark so that the thumb-turn locked / unlocked state can be clearly determined.

One embodiment of the present invention is shown in FIGS.
According to the first aspect of the present invention, the thumb turn (knob portion) is an integrated structure made of light alloy or plastic.
According to the invention of claim 2, the thumb turn security cap inner (hereinafter referred to as inner cap) 2 is made of a light alloy or plastic and has a groove (small chamber) 4 into which the thumb turn portion 11 in use is fitted, and a thumb turn portion 11. A screw 5 for fixing the inner cap 2 is provided.
The thumb-turn security cap outer (hereinafter referred to as the outer cap) 3 and the inner cap 2 are provided with a groove 6 and a protrusion 7 for rotating in an integrated state. When inserting into the cap 2, the protrusion 7 is inserted into the groove 6. When the outer cap 3 is fitted, the small protrusions 8 provided at several locations on the outer peripheral surface of the inner cap 2 are engaged with the shallow grooves 9 provided on the inner peripheral surface of the outer cap 3, so that the outer cap 3 The structure is designed to prevent the dropout by fixing.

Effects of the embodiment

  According to this embodiment, since the outer peripheral part is circular and the surface is smooth, it does not rotate even if a force acts on one point of the outer peripheral part, and the wire or tool from the door gap, door view or post port It is impossible to unlock by directly turning the thumb turn indoors.

Other embodiments

  3 and 4, the thumb turn security cap inner 2 has a single structure, but in other embodiments, as shown in FIGS. 10 to 12, a plastic two-part structure is used. Further, in this embodiment, the thumb turn security cap inner 2 is provided with a groove (small chamber) 4 having the same shape as the outer shape of the thumb turn 11 and is mounted so as to wrap the thumb turn 11 from the top, bottom, left and right. The security cap outer 3 is fitted and integrated.

The invention's effect

  As described above, according to the present invention, since the outer peripheral portion has a circular shape and the surface is smooth, in recent years, a wire or a tool or the like from a door gap, a door view or a post port is used as a new illegal unlocking method. There are many techniques for illegally unlocking illegally by inserting and turning the indoor thumbturn directly, but it is almost impossible to rotate these illegally.

  It is a perspective view which shows one Embodiment of this invention (Claim 1).   It is a side view which shows one Embodiment of this invention (Claim 1).   It is sectional drawing of the state which assembled | attached the thumb turn crime prevention cap of this invention (Claim 2) to the conventional thumb turn.   It is sectional drawing which looked at the form of the crime prevention cap inner of this invention from the side.   It is a rear view which shows the form of the crime prevention cap inner of this invention.   It is sectional drawing which looked at the form of the crime prevention cap outer of this invention from the side.   It is a rear view which shows the form of the crime prevention cap outer of this invention.   It is a perspective view which shows the form of the state which assembled | attached the thumb turn crime prevention cap of this invention (Claim 2) to the conventional thumb turn.   In the locked / unlocked state mark position of this invention (Claim 4), (A) shows the locked state, and (B) shows the unlocked state.   As another embodiment, it is a front view showing a form when the thumb turn security cap / inner has a two-part structure, and the left and right caps / inners are shown separated somewhat.   (1) The figure is the figure seen from the upper surface or the lower surface which shows the form of the thumb turn crime prevention cap inner of a two-part structure, and shows the left and right cap inners somewhat separated like FIG. (2) The figure shows the form of the mating surface of the security cap / inner.   It is a rear view which shows the form of the thumb turn crime prevention cap inner of a two-part structure, and the left and right cap inners are separated somewhat like FIG.   It is a perspective view which shows an example of the conventional thumb turn form.

Explanation of symbols

1 Integrated crime prevention thumb turn with a cylindrical shape 2 Thumb turn security cap / inner 3 Thumb turn security cap / outer 4 Groove to fit the saturn part of the process (small room)
5 Tightening screw for fixing the thumb turn security cap / inner to the thumb turn part in use 6 Vertical groove provided on the outer circumference of the thumb turn security cap 7 Vertical projection provided on the inner circumference of the thumb turn security cap / outer 8 Thumb turn security caps ・ Small protrusions at several locations on the outer peripheral surface of the thumb 9 Shallow grooves provided on the inner peripheral surface of the thumb turn security cap 10 Thumb turn lock / unlock status indication mark.
11 Example of conventional thumb turn part

Claims (4)

  The thumb-turn shape of the door lock (main lock, lever handle lock, etc.) is a cylindrical integrated structure, which enhances the function of crime prevention.   A cylindrical thumb-turn security cap is retrofitted to the saturn of the door lock (locking lock, lever handle lock, etc.) in the process of use to increase the security function.   The thumb turn crime prevention cap of the preceding item 2 is characterized in that the thumb turn portion is sandwiched in the groove of the crime prevention cap manufactured by a single body or a two-part structure, and is easily attached to the thumb turn flat portion by screwing or the like.   The thumb turn of the preceding paragraph 1 and the thumb turn crime prevention cap of the preceding paragraph 2 are provided with a mark for displaying a locked / unlocked state on the front surface.

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