Door lock with panic function

Abstract

To provide a door lock with a panic function, related to a door, more specifically, capable of being easily installed by arbitrarily adjusting an installation length of an unlocking shaft according to a thickness of the door, capable of being generally used for a left- or right-hand door while precisely controlling actuation of a motor, and capable of reducing a load on the motor and a gear assembly when manually unlocked.SOLUTION: The door lock comprises: a shaft gear; a shaft knob fitted with the shaft gear, having an installation hole and an engaging groove formed in a longitudinal direction on a peripheral surface of the installation hole; a shaft whose tip part is fitted in the installation hole and whose rear end part is fitted in the door and connected to unlocking means; an elastic engaging member that is elastically supported so as to project from the outer peripheral surface of the shaft and has a locking part engaged with the engaging groove; and an elastic body that elastically supports the shaft in the installation hole in a direction opposite to the fitting direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a door lock, and more particularly to a door lock with a panic function that can be easily installed by freely adjusting the installation length of the unlocking shaft according to the thickness of the door, can be universally used for both left- and right-hand doors by precisely controlling the operation of the motor, and can reduce the load on the motor and gear assembly when manually unlocking the door. [Background technology]

[0002] Generally, for security and crime prevention purposes, door locks are configured to lock and unlock doors using various unlocking means, including the most common security key, as well as password entry, card keys, and fingerprint recognition.

[0003] A typical door lock has an indoor body and an outdoor body installed on both sides of the door, and a mortise is built into the door between the bodies and connected to each other by a shaft. After unlocking the deadbolt of the mortise, the door can be opened or closed by operating the latch bolt.

[0004] The deadbolt is extended or retracted by rotating the shaft either electrically using a motor or manually using a handle or thumb turn knob.

[0005] In this case, if the deadbolt is operated manually, if the rotational force of the shaft is transmitted to the motor's rotating shaft, it may cause a load to be applied to the motor, the reduction gear connected to the motor's rotating shaft, and the drive circuit, which may cause a malfunction. Therefore, when the motor is operating, the rotational force of the rotating shaft must be transmitted to the shaft, and when it is operated manually, the rotational force of the shaft must not be transmitted to the motor's rotating shaft.

[0006] This function is usually called a "panic function." Door locks or mortises with panic functions are available in various forms, but conventional products with panic functions have a large number of parts and a complex structure, which is the main factor that increases manufacturing costs.

[0007] Meanwhile, when installing a door lock, the main body and the mortise must be connected with a shaft. However, since the depth from one side of the door to the shaft connection hole of the mortise varies depending on the thickness of the door, it is cumbersome to use a shaft that matches the thickness of the door. Therefore, there is a need to develop technology that allows for the universal use of a single standard shaft without replacing the shaft.

[0008] In addition, precise control of the motor requires accurate angle sensing of the gear that rotates through the shaft, and most of the sensors currently used in door locks are rotary resistive position sensors.

[0009] However, currently available rotary resistive position sensors are unable to detect angle values ​​for 360-degree rotation due to their structural characteristics, and therefore have a limited maximum angle detection range (approximately 330 degrees).

[0010] For this reason, conventional door locks are developed so that the gears connected to them rotate only within a certain angle in order to detect the rotation of the shaft, so there is an emerging need for technology that can control the motor more precisely by detecting 360-degree angles.

[0011] Furthermore, door locks are divided into right-handed and left-handed types depending on the handle position, and the shaft rotates in opposite directions depending on the handle, so there is a drawback in that a dedicated product must be used.

[0012] Therefore, there is a need for the development of a door lock with a panic function that can comprehensively solve all of the above-mentioned problems.

[0013] Incidentally, related prior art includes Korean Registered Utility Model No. 20-0452407, Korean Registered Patent No. 10-1853049, and Korean Registered Patent No. 10-1878463. Summary of the Invention [Problem to be solved by the invention]

[0014] The present invention has been devised to solve the above-mentioned problems, and its object is to provide a door lock with a panic function that can increase productivity and reduce manufacturing costs by integrating shaft length adjustment, 360-degree gear rotation angle detection, shaft rotation direction detection, reduced number of panic function parts, and simplified structure within the gearbox structure of the door lock. [Means for solving the problem]

[0015] In order to achieve the above object, the door lock according to the present invention comprises: Shaft gear and a shaft knob fitted to the shaft gear, the shaft knob having an attachment hole and a locking groove formed in a longitudinal direction on a circumferential surface of the attachment hole; a shaft whose tip end is fitted into the mounting hole and whose rear end is fitted into the door and connected to the unlocking means; an elastic engagement member that is elastically supported so as to protrude from the outer circumferential surface of the shaft and has an engagement portion that engages with the engagement groove; and an elastic body that fits the shaft in the mounting hole and elastically supports it in the opposite direction.

[0016] Further, in the door lock according to the present invention, The shaft gear includes a sensed protrusion protruding from a front surface thereof, The rotation detecting device is characterized by including a PCB substrate having a pair of rotation detecting sensors that are mounted to face the front surface of the shaft gear and are spaced apart at a predetermined interval around the shaft gear to detect the detected protrusion.

[0017] Further, in the door lock according to the present invention, an interlocking gear that meshes with the shaft gear and rotates together; a pair of rotary position sensors mounted on both sides of the PCB board on which the interlocking gear is mounted, the rotary position sensors being fitted so that the rotation shaft of the interlocking gear passes through the pair of rotary position sensors, and detecting the rotation angle of the rotation shaft of the interlocking gear; The pair of rotary position sensors are mounted to be offset from each other at different angles so that the angle non-sensing section of one of the pair of rotary position sensors overlaps with the maximum angle sensing section of the other rotary position sensor.

[0018] Further, in the door lock according to the present invention, a drive shaft that is axially mounted in the gearbox housing and rotated by the motor; a pressure rod coupled to the drive shaft so as to penetrate the drive shaft in the radial direction and rotate integrally with the drive shaft; a clutch cam into which the drive shaft is fitted from the front of the pressure rod and coupled to move back and forth in the longitudinal direction while idling, the clutch cam having a pressure protrusion protruding from the front surface, a first cam inclined surface formed along the circumferential direction from the back surface, and a locking protrusion protruding from the lowest point of the first cam inclined surface to lock the pressure rod; a driven gear into which the drive shaft is fitted from the front of the clutch cam so as to be idling coupled, the driven gear having a pressurized protrusion protruding from a rear surface thereof and engaged with the pressurizing protrusion; a spring member that elastically supports the clutch cam so as to move away from the driven gear, The housing has a second cam inclined surface formed on a front surface thereof along the periphery of a shaft hole in which the drive shaft is installed, The clutch cam includes a cam protrusion supported on the second cam inclined surface. [Effects of the Invention]

[0019] The door lock with panic function according to the present invention comprises: The shaft is fitted into the shaft knob, and the insertion depth of the shaft can be adjusted using the elastic engagement member and elastic body, so the unified shaft assembly can be adjusted in length and installed universally regardless of the door thickness. It is equipped with two rotation sensors that can detect the rotation direction of the shaft gear, so when installing the door lock, it can be detected as a right-hand door or a left-hand door and set accordingly, making it convenient to use. To detect the rotation angle value of the shaft, a pair of rotary position sensors are mounted on both sides of the PCB at different angles, and the rotation axis of the interlocking gear is connected to pass through the rotary position sensors on both sides. This allows precise control of the motor when measuring precise angle values ​​in a range of approximately 360 degrees relative to the interlocking gear. The clutch cam that constitutes the panic unit moves forward naturally due to the cam structure provided in the gearbox housing, so there is no need for additional parts or structures to prevent the clutch cam from idling when the drive shaft rotates. This simplifies the internal structure, increases productivity, and reduces manufacturing costs. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a perspective view of a door lock according to the present invention; [Figure 2] FIG. 2 is a primary exploded perspective view of FIG. 1. [Figure 3] FIG. 2 is a cross-sectional view of FIG. 1. [Figure 4] FIG. 1 is an exploded perspective view of a shaft assembly according to the present invention. [Figure 5] FIG. 1 is a perspective view of a main part of a gearbox according to the present invention. [Figure 6]FIG. 1 is a perspective view of a main part of a gearbox according to the present invention. [Figure 7] FIG. 6 is a cross-sectional view of FIG. 5. [Figure 8] FIG. 1 is an exploded perspective view of a panic unit in which the middle housing according to the present invention has end surfaces processed. [Figure 9] FIG. 1 is an exploded perspective view of a panic unit in which the middle housing according to the present invention has end surfaces processed. [Figure 10] FIG. 1 is a front view of a PCB substrate with a transparent shaft gear according to the present invention. [Figure 11] FIG. 1 is a rear view of a PCB substrate that has been transparentized according to the present invention. [Figure 12] 1 is a diagram of a PCB substrate that has been transparentized according to the present invention. [Figure 13] FIG. 2 is a side view of the clutch cam according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] The present invention is susceptible to various modifications and variations, and certain embodiments thereof will be described in detail herein, but it is to be understood that this is not intended to limit the invention to the particular disclosed embodiments, and that the invention is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

[0022] In each drawing, the same reference symbols, especially those with the same tens digit and ones digit, or with the same tens digit, ones digit and alphabet, indicate components with the same or similar functions, and unless otherwise specified, the components indicated by each reference symbol in the drawings may be understood to be components conforming to such standards.

[0023] Furthermore, in each drawing, the size and thickness of the components are exaggerated or simplified for ease of understanding, but this should not be construed as limiting the scope of protection of the present invention.

[0024] The terms used in this specification are used to describe particular embodiments (aspects) (or embodiments) and are not intended to limit the present invention. Unless otherwise specified in the context, singular expressions include plural expressions.

[0025] In this application, the terms "comprise" or "consist" and the like are intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0026] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted to have a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0027] The terms "first," "second," etc. described in this specification are merely used to distinguish between different components and are not limited to the order in which they were manufactured, and the names may not be consistent between the detailed description of the invention and the claims.

[0028] In describing the door lock of the present invention, for convenience, an approximate, loosely defined directional standard will be specified with reference to FIG. 1. The directions of up, down, left, and right are defined as they are seen from the perspective of the direction in which gravity acts, and unless otherwise specified in the detailed description of the invention and claims related to other drawings, the directions will be specified and described according to this standard.

[0029] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A door lock according to the present invention will now be described with reference to the accompanying drawings.

[0030] The present invention relates to a door lock with a panic function, and as shown in FIGS. 1 to 12, it mainly comprises a case body 10, a gear box 20, a shaft assembly 30, a PCB board 40, and a panic unit 50.

[0031] First, the case body 10 has a battery mounting section 11 that is opened and closed with a front cover, and the battery mounting section 11 has a control button section 12 consisting of a reset button, etc., and a control board 13 for power supply, etc. is attached to the back side of the battery mounting section 11.

[0032] In addition, a connecting board 14 is attached to the bottom of the control button section 12, and an electric opening / closing button 15 mounted on this is exposed on the front of the case body 10, and a thumb turn knob 36 for manual opening and closing is attached to the bottom of this.

[0033] The thumb turn knob 36 is connected to a shaft assembly 30, which is mounted to pass through the gear box 20 inside the case body 10, and the shaft 32 protrudes from the rear of the case body 10 and is connected to an unlocking means (typically a motor) built into the door.

[0034] The gear box 20 is divided into a front housing 21, a middle housing 22, and a rear housing 23. A gear assembly 25 having a reduction gear function for transmitting the rotational force of the motor 24 is mounted on the front housing 21. A shaft gear 26 is axially mounted on the middle housing 22 and a PCB board 40 is built in the middle housing 22. The motor 24 is built in the rear housing 23, and a panic unit 50 is mounted from the front housing 21 through the middle housing 22 and connected to the shaft gear 26.

[0035] First, the shaft assembly 30 is a shaft knob 31 fitted to the shaft gear 26, the shaft knob 31 having a mounting hole 311 and a locking groove 312 formed in the longitudinal direction on the circumferential surface of the mounting hole 311; a shaft 32 whose tip end is fitted into the mounting hole 311 and whose rear end is fitted into the door and connected to the unlocking means; an elastic engagement member 33 having an engagement portion 331 that is elastically supported so as to protrude from the outer circumferential surface of the shaft 32 and that engages with the engagement groove 312; and an elastic body 35 that fits the shaft 32 in the mounting hole 311 and elastically supports it in the opposite direction.

[0036] The shaft knob 31 is fitted into the bushing 16 connected to the case body 10 and is connected to be rotatable left and right. The mounting hole 311 penetrates in the longitudinal direction and is connected to the front exposed end portion, a thumb turn knob 36 is connected to the front exposed end portion, and the rear end portion is fitted to the shaft gear 26. The shaft 32 is fitted to the rear end of the mounting hole 311, and the locking grooves 312 are arranged radially at the rear end of the mounting hole 311.

[0037] In this shaft knob 31, the shaft gear 26 and the shaft 32 are interconnected by a polygonal structure or a locking structure, and the shaft assembly 30 is rotated manually together with the shaft gear 26 by the thumb turn knob 36, or the shaft assembly 30 is rotated electrically together with the shaft gear 26 by the motor 24.

[0038] The shaft 32 has an angular structure at both ends, and the ends are fitted into the mounting hole 311 and the unlocking means in the door, respectively, so that the door lock and the unlocking means are mechanically connected to each other.

[0039] The shaft 32 has mounting grooves 321 formed in the longitudinal direction on both the front and rear sides of the middle, and the inner ends of each mounting groove 321 are connected to fitting grooves 322 formed in the radial direction.

[0040] The elastic engaging member 33 has a pin spring shape with a pseudo-triangular wedge-shaped locking portion 331 connected to its tip and its end bent at a right angle. The end of the elastic engaging member 33 is fitted into the fitting groove 322, and the locking portion 331 is connected to be exposed to the opening of the mounting groove 321. A separation prevention plate 323 is connected to the shaft 32 to cover the fitting groove 322 and is fixed.

[0041] Such an elastic engaging member 33 allows the locking portion 331 to be elastically deformed toward the inside of the mounting groove 321, and when the shaft 32 is fitted into the mounting hole 311, the locking portion 331 is accommodated in the mounting groove 321, and then elastically restored to the position of the locking groove 312, thereby engaging the locking portion 331 with the mounting groove 321.

[0042] The elastic body 35 is a compression spring whose tip is supported by the thumb turn knob 36 and whose rear end is supported by the tip of the shaft 32, and elastically supports the shaft 32 so that it fits in and protrudes in the opposite direction, i.e., toward the back side of the case body 10.

[0043] Therefore, the shaft assembly 30 can adjust its overall length by freely extending and retracting the shaft 32 from the shaft knob 31, so that a single standard shaft assembly 30 can be used to install and use a universal door lock regardless of the thickness of the door.

[0044] Next, the rotating shaft 241 of the motor 24, protected by the rear housing 23, protrudes from the lower right end of the front of the middle housing 22, and engages with the gear assembly 25 mounted next to it to transmit the rotational force of the motor 24 to the drive shaft 51 of the panic unit 50. The PCB board 40 housed within the middle housing 22 is mounted to face the front of the shaft gear 26, and various chips and elements for controlling the motor 24 are mounted on it.

[0045] In addition, an interlocking gear 43 for detecting the rotation angle of the shaft 32 rotated by the motor 24 is axially mounted on a rotating shaft 431 at the upper right end of the shaft gear 26 and meshes with the shaft gear 26, and a driven gear 54 of a panic unit 50 is axially mounted on a driving shaft 51 at the lower left end of the shaft gear 26 and meshes with the shaft gear 26, and the rotating shaft 241 of the motor 24, the gear assembly 25 and the driving gear 511 of the driving shaft 51 are protected by the front housing 21.

[0046] The shaft gear 26 includes a sensed protrusion 261 protruding from its front surface, and the PCB board 40 includes a pair of rotation sensing sensors 41 and 42 mounted around the shaft gear 26 at a predetermined distance and capable of sensing the sensed protrusion 261.

[0047] The sensed protrusion 261 moves by revolving around the center of the shaft gear 26 when the shaft gear 26 rotates.

[0048] The rotation sensors 41 and 42 are photo interrupters each consisting of a light emitting diode and a phototransistor, and are arranged around the shaft gear 26 at an angle of about 45 degrees.

[0049] Therefore, when the shaft gear 26 rotates, it can be determined whether the door is a right-hand door or a left-hand door based on the order of sensing of the sensed protrusions 261.

[0050] For example, if the sensed protrusion 261 is first sensed by the first rotation sensing sensor 41 and then by the second rotation sensing sensor 42, it is determined that the door lock is installed on the right-hand door, and conversely, if the sensed protrusion 261 is sensed by the second rotation sensing sensor 42 and then by the first rotation sensing sensor 41, it is determined that the door lock is installed on the left-hand door.

[0051] Furthermore, when used in conjunction with rotary position sensors 44, 45 described later, it is possible to determine the position range of the thumb turn knob 36 relative to the angle values ​​that change as the shaft gear 26 rotates 360 degrees left and right.

[0052] Next, the interlocking gear 43 meshes with the shaft gear 26 and rotates together, and the PCB board 40 is fitted so that the rotation axis 431 of the interlocking gear 43 passes through it. A pair of rotary position sensors 44, 45 that detect the rotation angle of the rotation axis 431 of the interlocking gear 43 are mounted on both sides of the PCB board 40, and the pair of rotary position sensors 44, 45 are mounted so that they are offset from each other at different angles so that the angle non-detection section of one of the rotary position sensors 44 overlaps with the maximum angle detection section of the other rotary position sensor 45.

[0053] The rotary position sensors 44 and 45 are configured as rotary resistive position sensors, and the rotary shaft 431 of the interlocking gear 43 is configured as a conductor.

[0054] Two rotary position sensors 44 and 45, each consisting of a rotary resistive position sensor, are arranged on either side of the PCB board 40, offset by a 90-degree angle, with the rotation axis 431 of the interlocking gear 3 as the concentric axis. As a result, the maximum rotation sensing range of each rotary resistive sensor overlaps more than the rotation non-sensing range of each rotary resistive sensor, and the angle for the overlapping angle range is corrected by the software algorithm of the control unit, making it possible to sense a rotation angle of more than 360 degrees around the rotation axis 431 of the interlocking gear 43.

[0055] Therefore, by calculating the gear ratio of the shaft gear 26 and the interlocking gear 43 together, precision control using the motor 24 can be achieved by knowing the rotation angle of the shaft gear 26 relative to the shaft 32, by comparing it with the rotation angle of the interlocking gear 43.

[0056] Next, the panic unit 50 will be described.

[0057] The panic unit 50 is A drive shaft 51 is mounted on the housing of the gearbox 20, more specifically, the middle housing 22, and is rotated by the motor 24. a pressure rod 52 connected to the drive shaft 51 so as to penetrate the drive shaft 51 in the radial direction and rotate integrally with the drive shaft 51; the drive shaft 51 is fitted from the front of the pressure rod 52 and coupled to move back and forth in the longitudinal direction while idling, and the clutch cam 53 has a pressure protrusion 531 protruding from the front surface, a first cam inclined surface 532 formed along the circumferential direction on the back surface, and a locking protrusion 533 protruding from the lowest point of the first cam inclined surface 532 to lock the pressure rod 52; a driven gear 54 into which the drive shaft 51 is fitted from the front of the clutch cam 53 so as to be idling, and which has a pressed protrusion 541 protruding from the rear surface and engaged with the pressing protrusion 531; a spring member 55 that elastically supports the clutch cam 53 so as to move away from the driven gear 54, The middle housing 22 has a second cam inclined surface 221 formed on the front surface thereof along the periphery of the shaft hole in which the drive shaft 51 is installed. The clutch cam 53 includes a cam protrusion 534 supported by the second cam inclined surface 221 .

[0058] First, the middle housing 22 has a shaft hole on the inner surface of the rear face into which the drive shaft 51 is fitted and pivoted, and a rearwardly recessed accommodation groove is formed around the shaft hole, and the second cam inclined surface 221 is formed along the edge of the accommodation groove.

[0059] The second cam inclined surface 221 has a shape in which the highest point at the front is connected to the lowest points at both rear sides, and two cam inclined surfaces are connected in a circle, so that one highest point has two lowest points.

[0060] The drive shaft 51 has a drive gear 511 that rotates integrally with the drive shaft 51 and is engaged with a gear assembly 25 that functions as a reduction gear to transmit rotational force from the motor 24, and its tip extends through the middle housing 22 to the position of the gear teeth of the driven gear 54.

[0061] The pressure rod 52 is connected to the front of the drive gear 511 so as to penetrate the drive shaft 51 in the radial direction.

[0062] The clutch cam 53 is fitted into the middle of the drive shaft 51 and is axially mounted thereon, and is capable of rotating independently of the drive shaft 51 and moving forward and backward along the drive shaft 51 .

[0063] Such a clutch cam 53 has four pressure protrusions 531 arranged radially along the periphery of the front surface, and a first cam inclined surface 532 having the same structure as the second cam inclined surface 221 formed along the rear edge.

[0064] At this time, the first cam inclined surface 532 and the second cam inclined surface 221 have corresponding structures, and the highest point and the lowest point are arranged on the same line in the front-rear direction.

[0065] In addition, the locking protrusion 533 protrudes from the lowest point of the clutch cam 53, and the pressure rod 52 is assembled to be located at the highest point of the first cam inclined surface 532. When the pressure rod 52 rotates on the first cam inclined surface 532, both ends of the pressure rod 52 are locked by the locking protrusion 533 at the lowest point of the first cam inclined surface 532, causing the clutch cam 53 to rotate together.

[0066] The clutch cam 53 is assembled so that the cam protrusion 534 protrudes outward from the locking protrusion 533 and is located at the lowest point of the second cam inclined surface 221 .

[0067] The driven gear 54 is supported on the inner surface of the front face of the front housing 21 while the tip of the drive shaft 51 is fitted therein, and is rotatable independently of the drive shaft 51 .

[0068] The driven gear 54 meshes with the shaft gear 26 and has a total of four pressurized protrusions 541 protruding from the rear surface thereof, each corresponding to the pressing protrusion 531, so that the four pressurized protrusions 541 are arranged on the same line as the pressing protrusions 531 in the front-to-rear direction.

[0069] The spring member 55 is a compression spring that is fitted onto the tip end of the drive shaft 51, with its front end supported on the rear surface of the driven gear 54 and its rear end supported on the front surface of the clutch cam 53, and elastically supports the clutch cam 53 by pushing it rearward against the driven gear 54. As a result, the clutch cam 53 is stopped with the pressure rod 52 supported at the highest point of the first cam inclined surface 532.

[0070] To explain how such a panel unit works, First, when the shaft 32 is manually rotated by the thumb turn knob 36 or a handle, the shaft gear 26 also rotates together, causing the driven gear 54 to rotate.

[0071] In this case, since the clutch cam 53 is spaced apart from the driven gear 54, when the driven gear 54 rotates, the drive shaft 51 does not rotate. Therefore, when the shaft 32 rotates manually, the rotational force is not transmitted to the gear assembly 25 and the motor 24, and no load is generated.

[0072] When the motor 24 is operated by the electric open / close button 15 or an external unlock signal, the rotational force of the motor 24 is transmitted from the gear assembly 25 to the drive gear 511, and the drive shaft 51 rotates together.

[0073] When the drive shaft 51 rotates, the pressure rod 52 rotates together and pushes the clutch cam 53 in the rotation direction.

[0074] When the pressing rod 52 pushes the clutch cam 53 and rotates together with it, the cam protrusion 534, which was at the lowest point of the second cam inclined surface 221, moves to the highest point of the second cam inclined surface 221, causing the clutch cam 53 to rotate and advance. At this time, since the pressing protrusion 531 is separated from the pressed protrusion 541 while the clutch cam 53 advances, the driven gear 54 does not rotate.

[0075] Furthermore, when the clutch cam 53 advances with rotation and the cam protrusion 534 reaches the highest point of the second cam inclined surface 221, the pressure accumulated as the spring member 55 is compressed exceeds the force that rotates the clutch cam 53, and the elastic force of the spring member 55 acts as a force that presses the clutch cam 53 backward to stop it, thereby stopping the rotation of the clutch cam 53.

[0076] When the rotational resistance pressure acts on the clutch cam 53 in this manner, the pressure rod 52, which was at the highest point of the first cam inclined surface 532, continues to rotate and moves to the lowest point of the first cam inclined surface 532 while riding on the first cam inclined surface 532, pushing the clutch cam 53 forward without rotating.

[0077] Subsequently, when the pressure rod 52 is engaged with the engagement protrusion 533 at the lowest point of the first cam inclined surface 532, the clutch cam 53 completes its forward movement and rotates again together with the drive shaft 51 due to the pressure of the pressure rod 52 pressing the engagement protrusion 533 in the rotational direction.

[0078] In this way, at the forward movement completion position of the clutch cam 53, the pressing protrusion 531 is positioned on the same line as the pressed protrusion 541, so that while the clutch cam 53 rotates, the pressing protrusion 531 presses the pressed protrusion 541, and the driven gear 54 starts to rotate, When the driven gear 54 rotates, the shaft gear 26 meshing therewith and the shaft assembly 30 rotate together, thereby electrically operating the door lock.

[0079] When the door is locked or unlocked and the motor 24 is stopped, the rotational force applied to the drive shaft 51 disappears and the rotation of the drive shaft stops. When the rotation of the drive shaft 51 stops in this manner, the clutch cam 53 is pushed backward by the pressure of the spring member 55 and moves backward while rotating to a predetermined position, and the pressure rod 52 and the cam protrusion 534 return to their initial positions before the operation of the motor 24.

[0080] In this case, the conventional panic function has the disadvantage that if the clutch cam is stopped and not rotating when the drive shaft first rotates, the pressure rod moves on the first cam inclined surface and the clutch cam moves forward, so additional parts and structures must be adopted to selectively fix the clutch cam so that the clutch cam does not idle with the drive shaft.

[0081] In contrast, in the present invention, as described above, when the clutch cam 53 first rotates together with the drive shaft 51 using the second cam inclined surface 221, the clutch cam 53 naturally moves forward, and then the pressure rod 52 is engaged with the engaging protrusion 533 and continues to rotate, thereby eliminating the need for additional parts for the conventional panic function and simplifying the internal structure accordingly.

[0082] In the above description of the present invention, a door lock has been mainly described with reference to the accompanying drawings. However, various modifications, changes, and substitutions may be made to the present invention by those skilled in the art, and such modifications, changes, and substitutions should also be construed as falling within the scope of protection of the present invention. [Explanation of symbols]

[0083] 10 Main unit case 11 Battery compartment 12 Control button section 13 Control board 14 Connecting board 15 Electric opening / closing button 16 Bush 20 Gearbox 21 Front housing 22 Middle Housing 23 Rear housing 24 motor 25 Gear Assembly 26 Shaft Gear 30 Shaft Assembly 31 Shaft knob 32 shaft 33 Elastic engagement member 35 Elastic Body 36 Thumb turn knob 40 PCB boards 41, 42 Rotation detection sensor 43 Interlocking Gear 44, 45 Rotary position sensor 50 Panic Unit 51 Drive shaft 52 Pressure rod 53 Clutch cam 54 Driven gear 55 Spring material

Claims

1. Shaft gear and a shaft knob fitted to the shaft gear, the shaft knob having an attachment hole and a locking groove formed in a longitudinal direction on a circumferential surface of the attachment hole; a shaft whose tip end is fitted into the mounting hole and whose rear end is fitted into the door and connected to the unlocking means; an elastic engagement member that is elastically supported so as to protrude from the outer circumferential surface of the shaft and has an engagement portion that engages with the engagement groove; an elastic body that fits the shaft in the mounting hole and elastically supports it in the opposite direction.

2. The shaft gear includes a sensed protrusion protruding from a front surface thereof, 2. The door lock of claim 1, further comprising a PCB board having a pair of rotation detection sensors mounted to face the front surface of the shaft gear and spaced apart at a predetermined interval along the circumference of the shaft gear, the rotation detection sensors being capable of detecting the sensed protrusion.

3. a pair of rotary position sensors mounted on both sides of a PCB board on which the interlocking gear is mounted, the rotary position sensors being fitted with the rotation shaft of the interlocking gear so as to pass through the shaft, and detecting a rotation angle of the rotation shaft of the interlocking gear; 2. The door lock of claim 1, wherein the pair of rotary position sensors are mounted at different angles so that the angle non-sensing section of one of the pair of rotary position sensors overlaps with the maximum angle sensing section of the other rotary position sensor.

4. a drive shaft that is axially mounted in the gearbox housing and rotated by the motor; a pressure rod coupled to the drive shaft so as to penetrate the drive shaft in the radial direction and rotate integrally with the drive shaft; a clutch cam into which the drive shaft is fitted from the front of the pressure rod and coupled to move back and forth in the longitudinal direction while idling, the clutch cam having a pressure protrusion protruding from the front surface, a first cam inclined surface formed along the circumferential direction from the back surface, and a locking protrusion protruding from the lowest point of the first cam inclined surface to lock the pressure rod; a driven gear into which the drive shaft is fitted from the front of the clutch cam so as to be idling coupled, the driven gear having a pressurized protrusion protruding from a rear surface thereof and engaged with the pressurizing protrusion; a spring member that elastically supports the clutch cam so as to move away from the driven gear, The housing has a second cam inclined surface formed on a front surface thereof along a periphery of a shaft hole in which the drive shaft is installed, 4. The door lock according to claim 1, wherein the clutch cam includes a cam protrusion supported by the second cam inclined surface.

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