KEY CYLINDER FOR ELECTRONIC LOCKING DEVICE

• US 20150096340A1
• Filed: 09/23/2013
• Published: 04/09/2015
• Est. Priority Date: 09/27/2012
• Status: Active Grant

• Current Assignee: Platformbase Co., Ltd.
• Original Assignee: Bum Soo Kim
• Inventors: Kim, Bum Soo
• Granted Patent: US 9,273,493 B2
• Time in Patent Office: Days
• US Class Current: 70/283.1
• CPC Class Codes: E05B 15/006 Spring-biased ball or roller entering a notch
• CPC Class Codes: E05B 2047/002 Geared transmissions
• CPC Class Codes: E05B 2047/0025 in the form of grooves
• CPC Class Codes: E05B 47/00 Operating or controlling locks or other fastening devices by electric or magnetic means electric permutation locks E05B49/00
• CPC Class Codes: E05B 47/0012 with rotary electromotors actuators with rotary electromotors per se H02K7/06, H02K23/68
• CPC Class Codes: E05B 47/02 Movement of the bolt by electromagnetic means; Adaptation of locks, latches, or parts thereof, for movement of the bolt by electromagnetic means by means in the striker E05B63/248
• CPC Class Codes: E05B 47/0626 radially
• CPC Class Codes: E05B 47/063 with a rectilinearly moveable blocking element
• CPC Class Codes: E05C 3/042 the handle being at one side, the bolt at the other side or inside the wing
• CPC Class Codes: G07C 9/00706 with conductive components, e.g. pins, wires, metallic strips
• CPC Class Codes: Y10T 70/7062 Electrical type [e.g., solenoid]
• CPC Class Codes: Y10T 70/7068 Actuated after correct combination recognized [e.g., numerical, alphabetical, or magnet[s] pattern]
• CPC Class Codes: Y10T 70/7102 And details of blocking system [e.g., linkage, latch, pawl, spring]
• CPC Class Codes: Y10T 70/7136 Key initiated actuation of device

Abstract

Provided is a key cylinder for an electronic locking device including a cylinder housing forming an appearance and a cylinder plug installed in the cylinder housing to lock and release the cylinder housing, wherein the cylinder plug includes a lock head including a key insertion hole into which a key head of a publicly known electronic key is removably inserted to a front side, a printed circuit board exchanging power and authentication data from the publicly known electronic key by installing key connection pins in a connection housing installed through the lock head, accessing to the key connection pins and equipping with a microprocessor and EEPROM, a driving motor performing normal rotation and reverse rotation drive in accordance with an input signal of the printed circuit board, a spur gear installed in an axis of the driving motor, a lock pin guider fixed in a rear direction of the cylinder plug, a direction conversion rotary ring rotating in accordance with drive of the driving motor by an internal gear rotatably installed through a fixing axis in the center of the lock pin guider and engaged with the spur gear in a front direction and a spiral groove formed in a rear direction, and a lock pin installed in the lock pin guider such that a pin hole formed in a direction perpendicular to an axis direction of the cylinder plug fluctuates, inserted into one side of a spiral groove formed in the direction conversion rotary ring, positioned through a straight guide wall intercommunicating with the pin hole, and appearing and disappearing in lock holes and formed in the cylinder housing by moving in a perpendicular direction to axis rotation of the direction conversion rotary ring through installation of a foot pin performing straight line motion to realized locking and release of the key cylinder.

Claims

1. A key cylinder for an electronic locking device including a cylinder housing 50 forming an appearance, and a cylinder plug 11 positioned in an axis direction in the cylinder housing 50, rotatably installed in place and locking and releasing the cylinder housing 50, wherein the cylinder plug 11 includes a lock head 18 including a key insertion hole 17 into which a key head 101 of an electronic key 100 is removably inserted to a front side, a printed circuit board 20 exchanging power and authentication data from the publicly known electronic key 100 by installing key connection pins 12, 13 and 14 in a connection housing 19 installed through the lock head 18, accessing to the key connection pins 12, 13 and 14 and equipping with a microprocessor and EEPROM, a driving motor 21 performing normal rotation and reverse rotation drive in accordance with an input signal of the printed circuit board 20, a spur gear 22 installed in an axis of the driving motor 21, a lock pin guider 23 fixed in a rear direction of the cylinder plug 11, a direction conversion rotary ring 27 rotating in accordance with drive of the driving motor 21 by an internal gear 25 rotatably installed through a fixing axis 24 in the center of the lock pin guider 23 and engaged with the spur gear 22 in a front direction and a spiral groove 26 formed in a rear direction, and a lock pin 15 installed in the lock pin guider 23 such that a pin hole 28 formed in a direction perpendicular to an axis direction of the cylinder plug 11 fluctuates, inserted into one side of a spiral groove 26 formed in the direction conversion rotary ring 27, positioned through a straight guide wall 28a intercommunicating with the pin hole 28, and appearing and disappearing in lock holes 51 and 52 formed in the cylinder housing 50 by moving in a perpendicular direction to axis rotation of the direction conversion rotary ring 27 through installation of a foot pin 29 performing straight line motion to realized locking and release of the key cylinder.

2. The key cylinder for an electronic locking device according to claim 1, wherein the driving motor 21 including the spur gear 22 is fixed to the cylinder plug 11 in a front side, next to the lock head 18 through the printed circuit board 24 and the direction conversion rotary ring 27 is rotatably fixed to the lock pin guider 23 fixed to the cylinder plug 11 in a back side with the fixing axis 24 to separately assemble a passive part of the lock pin 15 which receives drive of a driving part and the driving motor 21 of the driving motor 21, in which the spur gear 22 is installed, and then operates by rotation of the direction conversion rotary ring 27 rotary.

3. The key cylinder for an electronic locking device according to claim 1, wherein the spur gear 22 meshing with the internal gear 25 formed in the direction conversion rotary ring 27 is spaced from a side portion 38 of the internal gear 25.

4. The key cylinder for an electronic locking device according to claim 1, wherein the internal gear 25 formed in the direction conversion rotary ring 27 is meshed with the spur gear 22 connected to the driving motor 21 such that the direction conversion rotary ring 27 rotates having a reduction speed ratio to rotation of the driving motor 21.

5. The key cylinder for an electronic locking device according to claim 1, further comprising a rotation control plate 57 positioned at a space between a rotation control jaw 56 formed from side to side at a lower portion of the cylinder housing 50 and inserted into a connection pole for a latch bolt 59 rotatably installed by a snap ring 58 at an inner side of the cylinder housing 50 to limit a rotation angle of the cylinder plug 11.

6. The key cylinder for an electronic locking device according to claim 5, wherein a prismatic hole 63 coincided with a position fixing plane section 62 formed in the connection pole for a latch bolt 59 is formed in the center of the rotation control plate 57 and a rotation fixing jaw 64 is formed on a circumference surface of the prismatic hole 63, to change locking and release directions of the cylinder plug 11 and to control a rotation angle.

7. The key cylinder for an electronic locking device according to claim 1, wherein the switch 39 is installed in the printed circuit board 20 and a snap ball housing 40 is fixed to the printed circuit board 20 to prevent arbitrary rotation of the cylinder plug 11 at a release state of the key cylinder 10, and, through this, a spring 41, a snap switcher 42 and the snap ball 16 are sequentially installed and the snap ball 16 is selectively positioned in the first and second snap holes 53 and 54 formed in the cylinder housing 50 through a through-hole 43 of the cylinder plug 11, and the snap ball 16 is pushed by rotating the cylinder plug 11 through the electronic key 100, and thereby the snap switcher 42 turns on/off the switch 39, and, accordingly, by drive of the driving motor 21, the lock pin 15 is selectively positioned in the first and second lock holes 51 and 52 formed in the cylinder housing 50 to maintain a locking state of the cylinder plug 11.