JPH0384177A - Locking device - Google Patents

Abstract

PURPOSE:To simplify method for setting code numbers by installing engaging members and to-be-engaged members in an external cylinder through engaging teeth with the engagement kept by a stopper, and by releasing the engagement with the stopper removed when there is a necessity for changing the code numbers. CONSTITUTION:No. 1 engaging member 48 having external gear teeth 51 and No. 2 engaging member 53 having external gear teeth 55 are prepared and are fitted into the inside of an external cylinder 41 with specified relation with a rotary knob 47 kept. No. 1 to-be-engaged member 56 having internal gear teeth 58 and No. 2 to-be-engaged member 57 having internal gear teeth 60 are prepared and are fitted into the external cylinder 41 with the engagement made with the engaging members 48 and 53. A stopper 62 in thickness corresponding to tooth depth of the teeth 51 and 55 is prepared and is inserted into the external cylinder 41 through notches 45 and 46 and is attached to the rear end of the to-be-engaged members 56 and 57. In case of changing code numbers, the engagement is released with the stoper 62 removed, and new code numbers are set with the knob 47 turned. Thereby the code numbers can be changed simply.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a locking device, and particularly to a dial-type locking device used for doors of safes, mailboxes, and the like.

``Prior Art'' Conventionally, dial-type locking devices (so-called combination locks) used on the doors of safes, mailboxes, etc. generally have dial letters on the surface and protruding tabs at appropriate locations on the inside. a knob rotation member having a knob, and an inner portion fixedly attached to the knob rotation member by a screw inserted through a center hole of the knob rotation member, and having an unlocking notch formed at the rear end. A cylindrical body, which is rotatably attached to the inner cylindrical body, and has protrusions that engage with the tabs at appropriate locations on the front end, and an unlocking notch that matches the notch is formed at the rear end. It consisted of a latch mechanism having an outer cylinder body, and a latch plate that engages with and disengages from the notches of the outer cylinder body and the inner cylinder body to unlock and lock the lock.

However, in such a combination lock that is inside the shell,
After aligning the knob with the rotating member to the index number, for example the letter rOJ, turn it clockwise or counterclockwise based on the password.
The notches of the outer cylinder and the inner cylinder coincide with the rear end of the latch plate of the latch mechanism, and the latch plate becomes unlockable.

However, this type of combination lock is convenient because it allows you to easily open the door of a mailbox or the like by turning the rotating member to the left or right based on a certain PIN number, but if the PIN number is The disadvantage was that if someone else found out about it, that would be the end of it.

Therefore, the present applicant proposed an embodiment of a locking device shown in FIG. 7 as Japanese Patent Application No. 111134/1982.

That is, to summarize the configuration of the above embodiment, the outer and inner members 1
And, 1# can be freely moved together with this outer cylinder member! a knob rotating member 7 which is attached to the outer cylinder member and has a first engaging body 8; A second engaging body 13 that is freely fitted to the outside, and a second engaging body 13 that is housed inside the outer cylindrical member so as to be separated from the plurality of engaging bodies 8 and 13 when the knob rotation member is turned seven times and converted to an arbitrary password. A plurality of engaged objects 16 and 17
and a latch holder 2 that is removably attached to the outer cylinder member 1 that pivots the latch plate 25 and is unlocked and locked by engaging and disengaging from the notches 20 and 23 of these engaged bodies.
It consists of 6.

By the way, although this embodiment has the advantage of being able to arbitrarily convert the PIN number if it becomes known or can be known by another person, when converting the PIN number, First, the male screw for fixing the latch holder must be loosened, then the latch holder 26 must be taken out from the outer cylinder member 1, and then the rotation member 7 must be rotated arbitrarily by the knob, so it is possible to obtain the desired result with such a simple operation. The drawback was that it was not possible to set a personal identification number.

``Object of the present invention'' In view of the above-mentioned drawbacks of conventional combination locks, the present invention
To provide a locking device which can set a desired password with a simpler operation than when converting a password, and can be manufactured at low cost with fewer constituent parts.

"Means for Achieving the Objects of the Invention" The locking device of the present invention includes an outer cylinder member, a knob rotating member rotatably attached to the outer cylinder member and having a first engaging body, a second engaging body housed in the outer cylindrical member so as to rotate when the knob rotation member is rotated; A plurality of engaged bodies are housed inside the outer cylindrical member so as to be separated from the engaging bodies, and a latch plate that is unlocked and locked by being disengaged from the unlocking notches of these engaged bodies is pivotally supported. In a locking device comprising a latch holder removably attached to the outer cylindrical member, a notch for fitting and removing the stopper piece is formed in the outer cylindrical portion of the outer cylindrical member, and the latch holder is inserted through the notch. It is characterized in that a stopper piece for PIN number conversion that comes into contact with the rear end surface of the engaged body is removably fitted into the outer cylindrical member.

In the above configuration, it is desirable that the stopper piece is formed in a 0-shape as a whole so that the latch plate of the latch holder can be rotated and tilted when the lock is unlocked.

"Embodiments of the present invention" The present invention will be described in detail below with reference to embodiments shown in the drawings.

In one embodiment of FIGS. 1 to 6, X is a dial locking device that is attached to the door of a safe, mailbox, etc.
In this embodiment, it is fixed to the open end of the door a of the mailbox Y.

That is, 41 is an outer cylindrical member that is fixed to the open side end of the door a of the mailbox Y with a fixing device 42 such as a nut, and this outer cylindrical member 41 has a fitting part 41a formed at the front end and , an outer cylindrical portion 41b is formed on the rear end side to pass through a mounting hole formed in the door a, and is in contact with the front surface of Ra between the outer cylindrical portion 41b and the fitting portion 41a. Attachment 7 A flange portion 41C is integrally formed. 43 is a latch holder of a latch mechanism, etc., which will be described later, formed in the axial direction of the upper surface of the outer cylinder portion 41b (assuming that Fig. 1 is the standard). An elongated guide notch 44 for guiding the latch plate of the latch mechanism is formed on the lower surface of the outer cylindrical portion 41b facing the guide notch 43 into which the guide notch is fitted.

Reference numeral 45 denotes a notch for taking out the stopper piece that reaches tl, which is formed at an appropriate location on the outer cylinder part 41b of the outer cylinder part vi41. This notch 45 is formed in the outer cylindrical portion 41 as shown in FIG.
It is formed near the center of b so as to intersect with the guide notch 43 on the upper surface side. On the other hand, 46 is a notch for inserting a stopper piece having the same aspect as the notch 45, and this notch 46 is orthogonal to the guide notch 44 on the bottom side so as to face the notch on the top side. It is formed as follows. Therefore, in this embodiment, two cutouts for the stopper pieces are provided.

Reference numeral 47 denotes a knob rotation member which is rotatably fitted into the fitting portion 41a of the outer cylinder member 41 and locks and unlocks by restricting or releasing the movement of the latch plate of the latch mechanism by rotation operation. The surface 47a of the member 47 is provided with dial letters O through 9, for example.

Reference numeral 48 denotes a first engaging body that is fixed to a recess formed on the back surface of the knob rotating member 47 with a fixing device 49 such as a screw. Fixing tool 49
A through hole 4 formed in the center of the rotating member that is screwed together with the
A female thread 50 marked 1d is formed, and as shown in FIG.
i151 is formed.

As shown in FIGS. 2 to 4, the first engaging body 48 is fixed to the knob rotation member 47 with a fixing member 49 and is located within the fitting portion 41a of the outer cylinder member 41.

Reference numeral 52 denotes a drive hook which is formed in an annular shape inside the knob rotating member 47 and is provided on the engagement body fitting portion 47b that fits into the front end small diameter portion 48b of the first engagement body 48.
2 protrudes from the engagement fitting portion 47b and is integrally implanted in the knob rotating member 47.

Reference numeral 53 denotes a cylindrical second engaging body that is housed in the outer cylinder member 41 so as to be rotated by the rotation operation of the knob rotating member 41, and this second engaging body 53 is connected to the first engaging body 4G. A small-diameter fitting portion 53a that fits externally into the front-end small-diameter portion 48b and has engaged protrusions 54 at appropriate locations on the front end surface to engage with the claws 52.
and a large-diameter fitting portion 53b in which a plurality of engagement teeth 55 are formed radially at predetermined intervals on the rear end surface.

56.57 is an outer cylindrical member that separates from the first and second engaging bodies 48.53 on the side of the knob rotation member mentioned above when the knob rotation member 47 is rotated and converted to an arbitrary password. 41 is a plurality of engaged objects.

That is, as shown in FIG. 5, 56 is a cylindrical first engaged body having a plurality of radially engaged teeth 58 that engage with the engaging teeth 51 of the first engaging body 48 on its front end surface; An unlocking notch 59 is formed in the first engaged body 56 in the axial direction. Further, 57 is a cylinder that is rotatably fitted onto the first engaged body 56 and has a plurality of radially engaged teeth 60 on the front end surface that engage with the engaging teeth 55 of the second engaging body 53. the second of
This second engaged body 57 is also formed with an unlocking notch 61 that coincides with the notch 59 when unlocking.

62 is connected to the first and second engaged bodies 56.62 through the cutout portions 46.45 for fitting and removing the stopper pieces of the outer cylinder member 41 mentioned above.
This stopper piece 62 is a stopper piece for PIN number conversion that comes into contact with the rear end surface of the pin 57, and is removably fitted into the outer and inner member 41 using the notches 46 and 45.

As shown in FIG. It is formed in a 0-shape as a whole, and at least each engaging tooth 51.5 of the aforementioned engaging body 48.53
It has an origin corresponding to each of the 5 tooth bamboos. Note that each tip of the arm portion 62b is formed wide.

64 is detachable from the outer cylindrical part 41b of the outer cylindrical member 41, which has a latch plate 65 that unlocks and locks by engaging with and disengaging from each unlocking notch 59.61 of the first and second engaged bodies 56.57. This latch mechanism 64
A substantially cylindrical latch boulder 66 is provided.

When referring to FIG. 2, the latch plate 65 has an engaging portion 65a at its lower part that engages with and disengages from a stopper C fixedly protruding from the inner wall of the door a of the mailbox Y. On the other hand, lengths 7t and G5b are formed in the vertical direction in the central portion, and are attached to the latch holder 66 by a latch pivot pin 67 so as to be movable up and down and tiltable. In addition, the latch holder 66
has a guide notch 6Ga that corresponds to the aforementioned guide notch 43, 44 of the outer cylinder member 41 and guides the attached latch plate 65 so that it can move up and down, and communicates with this guide notch 66a, and the latch plate A housing portion 66b that stores a coil spring 68 that biases the tilted latch plate 65 to its original vertical state when the latch plate 65 moves upward or rotates in one direction.
are formed respectively.

"Function" In the above configuration, Figure 2 shows the locked state. In this case, each engagement 1ii51.55 of the first and second engagement bodies 48.53 and each engagement of the first and second engaged bodies 56.57 corresponding to each of the retaining teeth 51.55 Teeth 58,60 are in engagement. Then, the stopper piece 62 is inserted into the notch 46 on the lower surface side of the outer cylinder member 41 so that this engaged state can be maintained, and each arm part 62b of the stopper piece 62 is inserted into the notch 46 on the lower surface side of the outer cylinder member 41, and each arm part 62b is connected to the first and second engaged body 56. .57 in contact with each rear end surface. As shown in the figure, each notch 59.61 of the first and second engaged bodies 56.57 and the upper end 65c of the latch plate 65 of the latch mechanism 64 do not match, and therefore, the knob rotation member Even if the door a is pulled through the latch plate 47, the latch plate 65 is restricted by the rear end surfaces of the engaged bodies 56 and 57, and cannot be rotated and tilted.

Next, FIG. 3 shows that as a result of rotating the knob #J member 47 left and right based on the password from the state shown in FIG. is latch plate 6
5, indicating that it is in the unlocked state. In this case, when the latch plate 151a is pulled, the latch plate 65 that engages with the stopper C rotates and tilts until the engagement with the stopper is released, and the upper end 65c of the latch plate 65 engages with the stopper C.
Get into 1. Here, to explain the operation mode from the locked state to the unlocked state, first, the knob rotating member 47 is installed on the mounting flange portion 41c of the outer cylinder member (after aligning it with the pulled index part or indicator). It rotates in one direction based on the password. Then, the second engaging body 53
At the same time, the second engaged body 57, which is in an engaging relationship between the engaging teeth 55 and the engaged teeth 60, rotates in the open direction. On the other hand, when the knob rotation member 47 is rotated in the opposite direction based on the next password, the first engaged body 56 engages with the engaging teeth 51 of the first engaging body 48 via the engaged teeth 58. rotates integrally with the knob rotation member 47, and as a result, the notches 59. of the first and second engaged bodies 56.57 are rotated as one unit, as described above.
61 is aligned with the upper fa portion of the latch plate 65 to be in the unlocked state.

However, if your PIN number is now publicly known to others and you wish to convert it to a new number of your choice, you may need to push it out into the notch 45 (not shown) on the top side of the outer cylinder member 41. Insert sticks etc. as appropriate,
Push the tip of the arm portion 62b of the stopper piece 62 and press the fourth
As shown in the figure, the arcuate connecting portion 6 protrudes from the outer cylinder portion 41b.
2a with fingers and pull out the stopper piece 62 from the foreign member 41. Then, the first and second engaged bodies 56
．． 57 is released from the restraint 111I from the stopper piece, and can be moved backward in the axial direction by an amount corresponding to the thickness of the stopper piece.

Therefore, when the knob rotation member 47 is turned to the right one or more times, for example, and an arbitrary number is matched, the first engaging body 48 and the first
The second engaging body 53 and the second engaged body 57 can be displayed by turning the knob and rotating member 47 to the left to match the desired number. It is possible to show the unlocked connection position. After setting a new password in this manner, the stopper piece 62 is inserted into the notch 46 on the lower surface side of the outer cylinder member 41.

"Effects of the Present Invention" As is clear from the above description, in the present invention, a plurality of engaging bodies housed in an outer cylinder member and a plurality of corresponding engaged bodies are separated, Any desired password can be set by rotating the knob rotation member.

In the case of the embodiment shown in FIG. 7 previously proposed by the present applicant, first, the male screw of the latch holder (not shown) is loosened, then the latch holder 26 is temporarily removed from the outer cylinder member 1, and then the latch holder 26 is rotated. Although it was necessary to arbitrarily rotate the movable member 7 and then set a new password, in the present invention, the stopper piece 62 can be inserted into the outer cylinder without moving or removing the latch holder 66. Member 41
Remove it from the notch 46 of the
You can set a new PIN even more easily by rotating the button. Further, since there is no need for a connecting body or the like for integrally connecting a plurality of engaged bodies to the latch holder as in the conventional art, there are advantages such as ease of assembly and manufacturing at low cost.

2 is an explanatory diagram showing the locked state in the enlarged sectional view taken along the line II-II in FIG. 1, FIG. 3 is an explanatory diagram showing the unlocked state based on FIG. 2, and FIG. An explanatory diagram showing a state in which the stopper piece is pulled out from the outer cylindrical member and a plurality of engaged bodies are free based on FIG. 3, FIG. 5 is an exploded perspective view showing the main parts of the present invention, and FIG. An explanatory diagram showing the main parts of the invention,
FIG. 7 is an explanatory diagram similar to FIG. 2 showing a conventional embodiment.

X...Lock device, a...Door, C...Stopper 41...Outer cylinder member, 42.49...Fixing tool, 45.46...Notch in one corner of stopper, 47 ...
Knob rotating member, 48... first engaging body, 51.5
5... Engaging tooth, 52... Ivy, 53... Second engaging body, 54... Engaged protrusion, 56... First engaged body, 57... No. 2 engaged body, 59.6
1... Notch for unlocking,

Claims (1)

[Claims] 1) an outer cylindrical member, a knob rotatable member rotatably fitted into the outer cylindrical member and having a first engagement body, and a knob rotatable member that is rotatably fitted to the outer cylindrical member and has a first engagement body; a second engaging body housed in the cylindrical member; and a plurality of engaging bodies housed in the outer cylindrical member so as to be separated from the plurality of engaging bodies when the knob rotation member is rotated to convert into an arbitrary password. The latch holder is removably attached to the outer cylindrical member and supports a latch plate that engages with and disengages from the unlocking notches of these engaged bodies to unlock and lock the latch plate. In the locking device, a notch for fitting and removing a stopper piece is formed in the outer cylinder part of the outer cylinder member, and a stopper piece for PIN number conversion is brought into contact with the rear end surface of the engaged body through the notch. A locking device characterized by being removably fitted into an outer cylinder member.