JPH0367183B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention does not leave the number display as the PIN number when unlocking the number type security lock, but allows the number display to be changed to a number other than the PIN number while the lock remains unlocked. This invention relates to a PIN number secret keeping device in a security lock.

Conventionally, there are devices of this type such as those disclosed in Japanese Patent Application No. 58-10194 (Japanese Unexamined Patent Publication No. 59-141674) related to the present applicant's invention, but this invention corresponds to the locking/unlocking plate of the present invention. A stopper 3 is pivotally supported by a shaft 39 on a locking plate 13 (hereinafter, the reference numerals shown in Katsuko are those in JP-A-59-141674).
8, and a pin 42 inserted into the extension 19a of the unlocking plate 19 corresponding to the locking/unlocking operation plate of the present invention is provided at a position facing the notch 41 at the tip of the stopper 38. By sliding the locking lever 14 in the locking direction, the locking plate 13 slides in the locking direction, and the unlocking plate 19 is pulled by the unlocking plate elastic spring 24 and returns to the locking direction, and the pin 42 is Engages with the notch 41, and when unlocking, match the displayed number with the coded number, align the flat portions 8 of each rotary cam 6, and move the unlocking lever 20 in the unlocking direction with the elasticity of the elastic spring 24. When the locking lever 14 is slid against the resistance, the locking lever 14 also slides in the unlocking direction.
As a result, the raised part of the notch 41 is separated from the pin 42, and the stopper 38 is pulled by the stopper spring 40, and the engagement between the notch 41 and the pin 42 is released. , the unlocking plate 19 is pulled by the elastic spring 24 and returns to the locked state, and the movement of the locking rod 33 into the lock hole is controlled by the locking plate 13.
The horizontal movement of the lock plate 13 and the unlock plate 19 engaged by the complicated stopper 38 and the lock rod at the tip of the lock plate 13 are used to lock and unlock the door. 33, the locking lever 14 and the unlocking lever 20 are operated via the width increasing lever 18, so the structure of the invention is complicated, which increases the cost and makes the operation complicated. However, there are disadvantages such as the possibility that failures will increase as the number of parts increases.

However, in the present invention, instead of the conventional stopper 38 having a complicated structure, a locking/unlocking plate having an engaging protrusion and a locking/unlocking operation plate having an engaging piece are provided so as to be able to engage and disengage freely. The locking plate 13 was operated by operating the locking lever 14 and the unlocking plate 19 was operated by operating the unlocking lever 20, and the locking rod 33 was moved forward and backward by the width increasing lever 18 interposed between the locking plate 13. Since the locking/unlocking plate is actuated in the locking/unlocking direction by the locking/unlocking knob, the configuration is simple and locking/unlocking is possible with a simple operation. In the state shown in the figure, the display number can be changed to a number other than the recited number, and since the configuration is simple, it can be manufactured at low cost, and there are fewer failures.

Reference will now be made in detail to the accompanying drawings that illustrate one example of the implementation of the invention.

Reference numeral 1 denotes a lock/unlock plate which slides on the inner surface of the number type security lock body 2 and protrudes from the left end of the body 2 as shown in Figures 1, 2 and 4. A latch (not shown) is fixed at the part, a recessed notch part 3 is bored in the middle part, and a shaft 4c is inserted into the base part. It consists of three character rotary bodies 6 that are engageably inserted into each of the narrow diameter parts 5a of the rotary cam 5 and have display number characters 6a engraved on the outer periphery. If the three display number characters 6a match the recited number, the flat surfaces of the rotating cams 5 are aligned, allowing the locking/unlocking operation plate 19 (described later) to slide, and the locking/unlocking plate 1 to be slid in the unlocking direction. If the recited numbers do not match, the flat surfaces of the rotary cams 5 will not align, making it impossible for the locking/unlocking operation plate 19 to slide, thereby maintaining the locking/unlocking plate 1 in the unlocked state. 4a, and a ten-pointed star part 32 in which three character rotating bodies 6 with display number characters 6a written on the outer periphery are molded on each side surface.
By pressing the push button 33, the push button part 33a, which has an upward hollow part 35 and is composed of a pressing protrusion 36, a supporting protrusion 37, and a supporting protruding surface 38 formed on the inner surface of the hollow part 35, is released as shown in FIG. The two device parts 4a, 4 surround a known character rotating device part 4b that rotates with
A sliding hole 7 that can slide on the outer circumferential surface of b is bored. 8 is a fan-shaped notch as shown in Figure 4,
It is bored at the base end of the lock/unlock plate 1. Reference numeral 9 denotes a locking/unlocking shaft as shown in FIG. 2, which is inserted into a recess 10 formed on the inner surface of the base of the number type security lock main body 2. Reference numeral 11 denotes a rotating plate, which is fixed to the base of the locking/unlocking shaft 9 with screws 12, and the shaft 9 is connected to the lock body 2.
This is to prevent it from being pulled out, and a protrusion 13 that fits into the fan-shaped notch 8 is provided on the outer periphery. Reference numeral 14 denotes a spring locking piece as shown in FIG. 4, which, like the protrusion 13, protrudes from the outer periphery of the rotary plate 11 so as to form an angle of 120° with the protrusion 13. The lock/unlock plate 1 protrudes from the proximal extending portion 7a to the lower surface (forward in the plane of the paper in FIG. 4), and has a spring stopper 14a attached to the tip. Reference numeral 15 denotes a locking/unlocking knob as shown in FIGS. 1 and 2, which is inserted into the tip of the locking/unlocking shaft 9, and by turning the knob 15, a rotary plate is fixed to the base of the locking/unlocking shaft 9. 11 is rotated within the fan-shaped notch 8 of the locking/unlocking plate 1, and the rotation of the protrusion 13 within the fan-shaped notch 8 causes the locking/unlocking plate 1 to slide in the locking/unlocking direction. Reference numeral 16 denotes a lock holding spring as shown in FIG. 4, which is made of a tension coil spring and is connected between the spring locking piece 14 of the rotary plate 11 and the spring hook 17 installed on one side of the base end of the lock body 2. The rotating plate 11 is always rotated in the locking direction of the locking and unlocking plate 1, and the locking holding spring 16 cannot slide the locking and unlocking plate 1 in the unlocking direction unless the locking and unlocking knob 15 is rotated. That is. Reference numeral 19 denotes a locking/unlocking operation plate, which is attached to the upper surface of the locking/unlocking plate 1 as shown in FIG.
and three separate character rotation device parts 4 of the character rotation body 6.
three through holes 20, 20, into which both the
20, and locking/unlocking pieces (bridge parts) 21, 21 are molded at the boundaries of each through hole 20.
As shown in Part B, the three through holes 20, 20, 20
Among these, the operation plate 19 at the tip of the through hole 20 at the tip is used as a locking/unlocking part 21a, and the through hole 20 at the base end of the operation plate 19 is left open. 22 is the operation panel 19
A spring receiver curved and protruding from one side of the tip of the lock body 2 receives a spring 24 made of a compression coil spring fitted into a spring fitting groove 23 formed on the inner surface of the side of the lock body 2. The receiver 22 is pressed toward the tip of the lock body 2, and the locking/unlocking operation plate 19 is constantly pressed toward the tip. Reference numeral 25 designates an engagement piece whose base is pivotally supported in a hole 26 bored in the middle part of the operating plate 19, and includes a spring receiver 27 protruding from the side surface of the middle part and a spring receiver protrusion 19a protruding from the operating plate 19. A torsion coil spring 28 is interposed between the engaging pieces 25, and as shown in FIG. 2
An engagement step 29b is provided from 9a to constantly press down the lowered engagement protrusion 29, and when locking, the engagement piece 25 and the engagement step 29b of the engagement protrusion 29 engage. , locking/unlocking board 1 and locking/unlocking operation board 1
9, and when locking, by matching the display number characters 6a of each character rotating body 6 with the recited number and turning the lock/unlock knob 15, the lock/unlock operation board 19 is integrated with the lock/unlock board 1 The locking/unlocking pieces 21, 21 and the locking/unlocking part 21a are slid together with the locking/unlocking plate 1 under the flat surface of each rotary cam 5. At this time, as shown in FIG.
By abutting against the protrusion 31 protruding from the inner surface,
The engaging piece 25 and the engaging protrusion 2 resist the elasticity of the spring 28.
This allows the locking/unlocking pieces 21, 21 and the locking/unlocking portion 21a to slide under the flat surface of each rotary cam 5 by releasing the engagement with the engagement step portion 29b of the rotary cam 5. 3
2 is a ten-pointed star part formed on the side surface of the character rotating body 6;
33 is a push button, and 34 is a recitation number setting change lever.

The present invention has the above-described configuration, and when locking, the display number characters 6a of each character rotating body 6 match the recited number, and the locking/unlocking knob 15 is turned in the direction of arrow C to lock the lock as shown in FIG. The lock plate 1 protrudes to the left of the lock body 2, and as shown in FIG.
slides on the flat surface 29a of the engagement protrusion 29, engages with the engagement step portion 29b, and locks/unlocks the locking plate 1 and the operating plate 19.
As shown in FIG.
Each character rotating body 6 can be easily rotated by pressing the push button 33 to operate the character rotating unit 4b without coming into contact with any of the character rotating units 4b. Next, when unlocking, match each letter rotating body 6 with the code number and turn the locking/unlocking knob 15 in the direction of arrow D, the protruding locking/unlocking plate 1 retreats into the lock body 2, and the locking/unlocking plate 1 and engagement piece 2
5 and the engaging protrusion 29, the integrated locking/unlocking operation plate 19 also retreats, so that the spring receiver 27 of the engaging piece 25 comes into contact with the protrusion 31 of the back cover 30, and the engaging piece 25 and the engagement step portion 29 of the engagement protrusion 29
b is released, and the locking/unlocking operation plate 19 returns to the same position as when it was locked due to the elasticity of the spring 24, so that each character rotating body 6 can be rotated in the same way when unlocking. , the number display is not left unattended, and the effect of keeping the secrecy of the PIN number is significant.

[Brief explanation of drawings]

The attached drawings show an example of the implementation of the present invention, and FIG. 1 is a front view of the security lock when the lock is locked, FIG. 2 is a cross-sectional view of the main part taken along the line A-A in FIG. -B
Figure 4 is a rear view of the security lock when it is locked with the back cover removed, Figure 5 is the lock/unlock operation panel, Figure A is a side view, and Figure B is a rear view. DESCRIPTION OF SYMBOLS 1... Locking/unlocking plate, 2... Number type security lock body, 3... Recessed notch, 4a... Locking/unlocking device section, 4b... Character rotation device section, 4c... Shaft, 5...
...Rotating cam, 5a...Slim diameter part, 6...Character rotating body, 6a...Display number character, 7...Through hole, 7a
... Extension part, 8 ... Fan-shaped notch, 9 ... Locking and unlocking shaft, 10 ... Recessed part, 11 ... Rotating plate, 12 ...
Screw, 13... protrusion, 14... spring locking piece, 14a... spring stopper, 15... lock/unlock knob, 16... lock retaining spring, 17...
Spring hook, 19...Lock/unlock operation panel, 19a
... Spring receiving projection, 20 ... Through hole, 21 ... Locking and unlocking piece, 21a ... Locking and unlocking part, 22 ... Spring receiver, 23 ... Spring fitting groove, 24 ... Spring, 25 ... Engagement piece , 25a...tip part,
26... hole, 27... spring receiver, 28... spring,
29...Engaging protrusion piece, 29a...Flat surface, 29b...
...Engagement step portion, 30...Back cover, 31...Protrusion, 3
2... Ten ridge star part, 33... Push button, 33a... Push button part, 34... Recitation number setting change lever, 35...
Upward hollow portion, 36...pressing protrusion, 37...supporting protrusion, 38...supporting protrusion.

Claims (1)

[Claims] 1. The main body of the number type security lock can be slid in the locking/unlocking direction, and a recessed cutout is bored in the middle part,
The base is inserted into the shaft installed in the security lock body,
It consists of a plurality of rotary cams having a flat surface on the side periphery, and a character rotary body that can be freely engaged with the rotary cam inserted into the narrow diameter part of the rotary cam, and if the number of the character rotary body matches the recitation number, The flat surfaces of each rotary cam are aligned and the locking/unlocking operation plate is made slidable, and if the number does not match the recited number, the flat surfaces are not aligned and the locking/unlocking operation plate is not slidable by the rotating cam. By pressing the lock/unlock device part and the push button, a multi-ridged star part formed on the side surface of the character rotation has an upward hollow part, and a pressing protrusion, a supporting protrusion, and a supporting protruding surface are molded on the inner surface of the hollow part. A locking/unlocking plate is provided which surrounds a character rotating device part which is rotated by a push button part, and has a sliding hole penetrating through which the side circumferences of both parts can be slid freely, and a through hole passing through both parts and a through hole passing through the through hole are provided. A number-type security lock in which a locking/unlocking operation plate formed with a locking/unlocking piece that is inserted into the flat surface of the rotary cam is separately installed between the holes, and the operation plate is attached to the locking/unlocking plate, the security lock main body. A spring fitting groove is bored at the tip of the locking/unlocking operation plate, and a spring receiver that fits into the fitting groove is provided at the tip of the locking/unlocking operation plate, and the operation plate is inserted between the base end of the spring fitting groove and the spring receiver. A spring that springs in the direction is provided, and the base end is rotatably supported via the spring on the locking/unlocking operation plate that overlaps with the recessed notch of the locking/unlocking plate, and its tip is always recessed. An engaging piece is provided that comes into contact with the engaging protrusion provided in the shaped notch, a protrusion that comes into contact with the engaging part is provided on the tip of the inner surface of the back cover of the lock body, and A fan-shaped cutout is provided,
A rotating plate having a protruding protrusion that fits into the fan-shaped notch is fixed to the base of a locking/unlocking shaft inserted into the base of the lock body, and a lock retaining spring is provided between the rotating plate and the lock body, A locking/unlocking knob for moving the locking/unlocking plate in the locking/unlocking direction is provided at the tip of the locking/unlocking shaft, and when the locking/unlocking knob is operated to lock the lock, the engaging piece and the engaging projection piece engage with each other, and the locking/unlocking plate is unlocked. The locking/unlocking operation plate integrated with the lock plate is moved toward the tip of the lock body by the spring, and when the lock is unlocked, the locking/unlocking operation plate is integrated with the locking plate and moves toward the proximal end of the lock body. Recitation in a number type security lock characterized in that when the engaging piece comes into contact with the protrusion, the engaging piece is disengaged from the engaging protruding piece and moved to the tip of the lock body in the same manner as described above. Number secrecy device.