EP2963212B1 - An electro-mechanical blocking actuator and an access control device - Google Patents
An electro-mechanical blocking actuator and an access control device Download PDFInfo
- Publication number
- EP2963212B1 EP2963212B1 EP15171202.3A EP15171202A EP2963212B1 EP 2963212 B1 EP2963212 B1 EP 2963212B1 EP 15171202 A EP15171202 A EP 15171202A EP 2963212 B1 EP2963212 B1 EP 2963212B1
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- EP
- European Patent Office
- Prior art keywords
- sleeve
- blocking
- slit
- electro
- helical spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
- E05B47/0012—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with rotary electromotors
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B17/00—Accessories in connection with locks
- E05B17/20—Means independent of the locking mechanism for preventing unauthorised opening, e.g. for securing the bolt in the fastening position
- E05B17/2084—Means to prevent forced opening by attack, tampering or jimmying
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/06—Controlling mechanically-operated bolts by electro-magnetically-operated detents
- E05B47/0611—Cylinder locks with electromagnetic control
- E05B47/0619—Cylinder locks with electromagnetic control by blocking the rotor
- E05B47/0626—Cylinder locks with electromagnetic control by blocking the rotor radially
- E05B47/063—Cylinder locks with electromagnetic control by blocking the rotor radially with a rectilinearly moveable blocking element
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
- E05B2047/0014—Constructional features of actuators or power transmissions therefor
- E05B2047/0018—Details of actuator transmissions
- E05B2047/0026—Clutches, couplings or braking arrangements
- E05B2047/0031—Clutches, couplings or braking arrangements of the elastic type
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/06—Controlling mechanically-operated bolts by electro-magnetically-operated detents
- E05B47/0611—Cylinder locks with electromagnetic control
- E05B47/0619—Cylinder locks with electromagnetic control by blocking the rotor
- E05B47/0626—Cylinder locks with electromagnetic control by blocking the rotor radially
- E05B47/0634—Cylinder locks with electromagnetic control by blocking the rotor radially with a pivotally moveable blocking element
Definitions
- the invention relates to an electro-mechanical blocking actuator and an access control device provided with such a blocking actuator.
- Publication US2013/0043751 (A1 ) describes an electrical liner actuator which consists of a motor, a slider, a rotating shaft, a substantially helical spring and a pin, wherein the motor is a common DC micro motor and directly connected with the rotating shaft. A hole for fixing the pin is formed on the rotating shaft.
- the spring is sleeved on the rotating shaft and an extended portion of the pin is disposed between two adjacent winding coils of the spring.
- the motor is fixed inside a lock's housing the slider is arranged inside a sliding chute which is arranged inside the lock's housing and the sliding chute has the function of limiting and guiding the slider. For the slider to move to a retracted position, the motor and the rotating shaft rotate clockwise.
- the pin enters into a first winding of the spring from a transition portion and continues to rotate along the spiral of the spring, so that coils of the first winding on the left of the pin are driven to move to the right of the pin in turn; meanwhile, the spring is compressed and drives the slider to move to the right until the pin is disposed at a transition portion between the left of the first winding and a second winding.
- a buffer system is created in which energy can be stored within the spring. This energy could be used to move the slider to a blocking position or non-blocking position without a re-activation of the motor.
- the electro-mechanical blocking actuator as claimed in claim 1. More particularly, the electro-mechanical blocking actuator according to the invention comprises a housing, a spindle and an electric driver arranged to rotate the spindle around a rotation axis.
- a substantially cylindrical sleeve is movably arranged between the housing and the spindle, the sleeve comprising a slit.
- a pin is inserted through the slit of the sleeve and fixed to the housing.
- a helical spring is arranged which comprises a plurality of windings arranged around the spindle and having at least one of its outer ends fixed to the spindle. Coupling means are provided for movably coupling one of the windings of the helical spring to the sleeve.
- the sleeve is movable between a blocking position and a non-blocking position.
- the helical spring will act on the coupling means so as to drive the sleeve in a first co-axial direction from the blocking position to the non-blocking position.
- the helical spring will act on the coupling means so as to drive the sleeve in a second co-axial direction from the non-blocking position to the blocking position, the second direction being opposite to the first direction.
- the slit comprises at least a first and second slit portion, the second slit portion directly following the first slit portion at a transition point on the sleeve, and making an angle ⁇ relative to the first slit portion at the transition point, where ⁇ ⁇ 90 degrees.
- the sleeve will also turn to some degree around the rotation axis in rotational directions determined by the orientation of the slit portions relative to the housing.
- the provided blocking actuator is more robust to forceful manipulation as compared to known blocking actuators.
- An example of such a manipulation is knocking with a hammer on an access control device which comprises the blocking actuator, in a direction parallel to the rotation axis, which is the movement direction of the sleeve. Due to the presence of the angle ⁇ between the first and second slit portions, the pin will stop the sleeve. Since the force applied is only a temporary impulse, the helical spring will move the sleeve back to its blocked position, without the blocking actuator ever being in a non-blocking position.
- the slit in the sleeve has a substantially V-shaped form.
- the slit only has two slit portions, but the slit may have more than two slit portions.
- the angle ⁇ lies in a range of 80-90 degrees. More preferably the angle ⁇ is in a range of 85-87 degrees.
- the helical spring comprises two co-axial parts dividing the helical spring into a first helical part, a second helical part, and an intermediate helical part lying between the two co-axial parts.
- the sleeve comprises a further slit arranged on the opposite side of the slit, the further slit being line symmetrical relative to the slit with respect to the rotation axis.
- the electro-mechanical blocking actuator further comprises a movable blocking element coupled to the sleeve for blocking a locking means of an access control device.
- the blocking element may be rotatably coupled to the sleeve. In this way, forces on the blocking element created by the locking means, will cause the blocking element to rotate relative to the sleeve, thereby avoiding stress on and/or possible damage to the sleeve.
- the invention also relates to an access control device including a first part and a second part, wherein at least one of the parts is movably arranged with respect to the other part, the device comprising an electro-mechanical blocking actuator as described above, wherein the first part and the second part are connectable, particularly securable, to each other and/or disconnectable, particularly releasable, from each other by means of the blocking actuator.
- the invention also relates to an access control device including a stationary part and a movable part, and provided with the electro-mechanical blocking actuator according to the invention. More particularly, the device according to the invention is characterized in that the movable part and the stationary part are securable to each other and/or releasable from each by means of the blocking actuator.
- an access control device are e.g. an electronically controlled key safe, a security escutcheon, a door lock, an industrial locking unit, a door handle and a cylinder lock. Such devices often have limited power sources.
- the blocking actuator has an indirect functionality within a mechanical construction of the access control device in order to save energy.
- Such devices are manually operated by an authorized person who wishes access.
- the manual action may include e.g. rotating a handle, turning a knob or moving a sliding cover.
- the access control device according to the invention has advantages similar to the advantages of the blocking actuator according to the invention.
- FIG. 1 is an exploded view of an electro-mechanical blocking actuator 1 according to an embodiment of the invention.
- the blocking actuator 1 comprises a housing 2, a spindle 3 and an electric driver 4 arranged to rotate the spindle 3 around a rotation axis 5.
- the blocking actuator 1 further comprises a substantially cylindrical sleeve 6 movably arranged between the housing 2 and the spindle 3.
- the sleeve 6 comprises a slit 7.
- a pin 8 is inserted through the slit 7 of the sleeve 6 and fixed to the housing 2.
- a helical spring 9 comprising a plurality of windings is arranged around the spindle 3 and has its outer ends, or at least one of the outer ends, fixed to the spindle 3.
- the blocking actuator 1 comprises coupling means 10 for movably coupling one of the windings of the helical spring 9 to the sleeve 6.
- the coupling means comprise a helical spring 101 and a hook 102.
- the helical spring 101 of the coupling means 10 can be arranged around the sleeve 6 at a collar 61.
- Figure 1 also shows a blocking pin 11 which can be coupled to the sleeve 6 in a preferably rotatable manner.
- FIG. 2 shows a perspective view of an embodiment of the helical spring 9.
- the helical spring 9 comprises two co-axial parts 91, 92 dividing the helical spring 9 into a first helical part 93, a second helical part 94, and an intermediate helical part 95 lying between the two co-axial parts 91, 92.
- the helical spring 101 of the coupling means 10 is arranged around the sleeve 6 at the collar 61.
- the sleeve 6 is placed around the spindle 3 and the helical spring 9.
- the hook 102 of the coupling means 10 is hooked onto one of the windings of the intermediate helical part 95.
- the hook Due to the two co-axial parts 91, 92 the hook is limited in its movement, and will not drift after some time as would be the case in the absence of the co-axial parts 91, 92.
- the electric driver 4 is controlled by a fixed time period (e.g. 50ms). This time period may be chosen in a way that the sleeve 6 can make the stroke from the blocked to the unblocked position and vice versa.
- the end positions of the sleeve 6 will be determined by the slit 7 and the pin 8.
- the electric driver 4 is activated sufficiently long.
- the electric driver 4 is activated for an insufficient period of time, e.g. 10ms, the sleeve 6 is not yet moved sufficiently. The time required to move the sleeve 6 is not always exactly the same.
- a buffered stroke may take more time than a non-buffered stroke. Because prior to driving it is not known to the electric driver 4 whether there is a buffered or non-buffered movement to be made, a spacious activation period will be chosen. As a consequence, the motor 4 is almost always activated for a longer period than required to make a full stroke.
- a small magnet may be placed in the sleeve 6 in conjunction with sensors in the housing.
- the sleeve 6 is movable between a blocking position and a non-blocking position.
- Figure 3 shows a perspective view of the blocking actuator 1 in cooperation with a locking mechanism 30 with the housing 2 removed.
- the locking mechanism 30 may be part of an access control device as will be explained below in more detail.
- the locking mechanism 30 comprises a T-shaped pin 31, a spring 32 and a blocking ball 33.
- Figure 3 shows the sleeve 6 of the blocking actuator 1 in the blocking position in which the blocking pin 11 prevents movement of the T-shaped pin 31 caused by an external force on the locking mechanism.
- Figure 4 is a cross section of the blocking actuator 1 in cooperation with a locking mechanism 30 according to the embodiment of Figure 1 and 3 .
- the hook 102 of the coupling means 10 is hooking into one of the windings of the helical spring 9, more particularly of one of the windings of the intermediate helical part 95.
- the helical spring 9 will act on the coupling means 10 so as to drive the sleeve 6 in a first co-axial direction from the blocking position to the non-blocking position. If the electric driver rotates the spindle and the helical spring in a second rotational direction, opposite to the first rotational direction, the helical spring will act on the coupling means so as to drive the sleeve in a second co-axial direction from the non-blocking position to the blocking position, the second direction being opposite to the first direction.
- the helical spring 9 thus acts as a flexible thread between the spindle 9 and the sleeve 6.
- Figure 5 shows a perspective view of the blocking actuator 1 in cooperation with the locking mechanism 30 in a situation wherein the blocking actuator 1 is driven to unlock, but the blocking pin 11 is held by the blocking mechanism 30. Due to the rotation of the spindle 3 and thus the helical spring 9, a part of the helical spring will be pushed in.
- Figure 6 shows a cross section of the blocking actuator 1 wherein the helical spring 9 is partly pushed in. In this case the second helical part 94 and the intermediate helical part 95 are pressed in.
- the locking mechanism 30 that is holding the blocking pin 11 results in a fixed position of the hook 102.
- Driving the spindle 3 with the helical spring 9 towards the non-blocking position causes the first helical part 93 to be stretched out and the other helical parts to be compressed. The result is a buffered situation, in which the blocking actuator 1 will automatically switch to its non-blocking state, as soon as the force on the blocking pin 11 is released.
- Figure 7 shows a perspective view of the blocking actuator 1 in cooperation with the locking mechanism 30 in a situation wherein the blocking actuator 1 is in an unlocked state with the helical spring 9 in its released (i.e. not buffered) state.
- the blocking pin 11 is not blocking the locking mechanism 30.
- Figure 8 shows a cross section of the blocking actuator 1 of the situation of Figure 7 , wherein the helical spring 9 is not pushed in.
- Figure 9 shows a perspective view of the blocking actuator 1 in cooperation with the locking mechanism 30 in a situation wherein the sleeve 6 of the blocking actuator 1 is driven to its blocking position but it is blocked by the locking mechanism 30. Due to activation of electric driver 4 spindle 3 and thus the helical spring 9 are rotated until helical spring 9 is pressed in as shown in Figure 10 , which shows a cross section of the blocking actuator 1 in the situation of Figure 9 . As can be seen from Figure 10 , both the first helical part 93 and the intermediate helical part 95 are pressed in. The result is a buffered situation, in which the blocking actuator will automatically switch to its blocking position as soon as the blocking pin 11 in no longer obstructed by the locking mechanism 30.
- FIG 11 shows a perspective view of a sleeve 70 according to an embodiment.
- the sleeve 70 comprises two V-shaped slits 71, 72 which are symmetrical around the rotation axis 5.
- a tangent plane 80 is shown which is a flat plane touching the sleeve 70 at a point where the slit 71 changes direction.
- Figure 12 shows a projection 81 of the slit 71 onto the tangent plane 80.
- the slit 71 comprises two slit portions 71' and 71". These two slit portions 71' and 71" make an angle ⁇ which is smaller than or equal to 90 degrees.
- the angle ⁇ is in the range of 80-90 degrees and is preferably between 85-87 degrees, such as 85 degrees.
- the first and second slit portions 71', 71" do not necessarily have to be straight lines, they may be curved.
- Figure 13A shows such an example.
- the slits 71, 72 may comprise more than two slit portions, wherein a third slit portion makes a further angle ⁇ relative to the second slit portion.
- Figure 13B and 13C show examples of such embodiments.
- the angle ⁇ may be smaller than or equal to 90 degrees. Adding more slit portions can reduce the free travel of the sleeve when an impulse force is applied to the access control device.
- the sleeve may comprise only one slit 71, wherein the pin 8 will only extend from the housing through the slit 71, but will not extend through the sleeve 6.
- the pin 8 will force the sleeve 6 to turn when it is moved in the first or second co-axial direction by the helical spring 9.
- the sleeve 6 will turn around the rotation axis in rotational directions determined by the orientation of the slit portions 71', 71" relative to the housing 2.
- Figure 14 shows the embodiment of Figure 1-10 , wherein the T-shaped pin 31 is blocked by the blocking pin 11. So, in Figure 14 , a blocking position of the sleeve 6 (and thus of the blocking actuator) is shown. Figure 14 shows an arrow which indicates an impulse which may be created by a forceful attempt to manipulate the blocking actuator 1.
- An example of such a manipulation attempt is knocking with a hammer on an access control device which comprises the blocking actuator 1 in a direction parallel to the rotation axis, which is the movement direction of the sleeve 6; see the arrow F in Figure 14 .
- an access control device comprising a first part and a second part, wherein at least one of the parts is movably arranged with respect to the other part.
- the access control device may be e.g. a key safe or a security escutcheon.
- Figure 15 shows part of a cross section of a key safe having a first part 201, being a slidable movable cover, and a second part, being an inner frame 202 of the key safe. So the cover 201 and the inner frame 202 are movably arranged with respect to each other.
- the device is provided with the electro-mechanical blocking actuator as described above.
- the first part and the second part are securable to each other and/or releasable from each other by means of the blocking actuator 1.
- the blocking actuator 1 is driven so that the blocking pin 11 is blocking the T-shaped pin 31.
- the T-shaped pin 31 due to the forces of the spring 32, pushes the blocking ball 33 into a cavity 203 of the cover 201. If someone tries to open the cover 201, the cover 201 will be forced into the direction indicated by an arrow 205. But due to the blocking ball 33, the cover cannot be slid, so the key safe stays closed.
- the cover 201 can be slid and will then force the blocking ball 33 to move, which is possible in the situation of Figure 16 .
- Figure 15 and 16 show a device wherein the first part is a stationary part and the second part is a movable part, and wherein the movable part and the stationary part are securable to each other and/or releasable from each other by means of the blocking actuator.
- the electro-mechanical blocking actuator according to the invention may also be called the mechatronic blocking actuator or blocking actuator according to the invention.
- the blocking actuator and parts thereof can be made of any suitable material, such as metals, like stainless steel, aluminium alloys, copper alloys, or plastics, or composites of plastics.
Description
- The invention relates to an electro-mechanical blocking actuator and an access control device provided with such a blocking actuator.
- Publication
US2013/0043751 (A1 ) describes an electrical liner actuator which consists of a motor, a slider, a rotating shaft, a substantially helical spring and a pin, wherein the motor is a common DC micro motor and directly connected with the rotating shaft. A hole for fixing the pin is formed on the rotating shaft. The spring is sleeved on the rotating shaft and an extended portion of the pin is disposed between two adjacent winding coils of the spring. The motor is fixed inside a lock's housing the slider is arranged inside a sliding chute which is arranged inside the lock's housing and the sliding chute has the function of limiting and guiding the slider. For the slider to move to a retracted position, the motor and the rotating shaft rotate clockwise. The pin enters into a first winding of the spring from a transition portion and continues to rotate along the spiral of the spring, so that coils of the first winding on the left of the pin are driven to move to the right of the pin in turn; meanwhile, the spring is compressed and drives the slider to move to the right until the pin is disposed at a transition portion between the left of the first winding and a second winding. In this way a buffer system is created in which energy can be stored within the spring. This energy could be used to move the slider to a blocking position or non-blocking position without a re-activation of the motor. - When using a blocking actuator as described above, there is a risk of manipulation. For example, if a sudden external force is applied in a direction along the rotating shaft, part of the spiral may be compressed resulting in an unwanted displacement of the slider relative to the sliding chute, which could lead to an unlocking of an access control device.
- It is an object of the invention to provide a more reliable electro-mechanical blocking actuator.
- This object is achieved by the electro-mechanical blocking actuator as claimed in
claim 1. More particularly, the electro-mechanical blocking actuator according to the invention comprises a housing, a spindle and an electric driver arranged to rotate the spindle around a rotation axis. A substantially cylindrical sleeve is movably arranged between the housing and the spindle, the sleeve comprising a slit. A pin is inserted through the slit of the sleeve and fixed to the housing. A helical spring is arranged which comprises a plurality of windings arranged around the spindle and having at least one of its outer ends fixed to the spindle. Coupling means are provided for movably coupling one of the windings of the helical spring to the sleeve. The sleeve is movable between a blocking position and a non-blocking position. - If the electric driver rotates the spindle and the helical spring in a first rotational direction, the helical spring will act on the coupling means so as to drive the sleeve in a first co-axial direction from the blocking position to the non-blocking position.
- If the electric driver rotates the spindle and the helical spring in a second rotational direction, opposite to the first rotational direction, the helical spring will act on the coupling means so as to drive the sleeve in a second co-axial direction from the non-blocking position to the blocking position, the second direction being opposite to the first direction.
- The slit comprises at least a first and second slit portion, the second slit portion directly following the first slit portion at a transition point on the sleeve, and making an angle α relative to the first slit portion at the transition point, where α ≤ 90 degrees. During movement of the sleeve in the first or second co-axial direction, the sleeve will also turn to some degree around the rotation axis in rotational directions determined by the orientation of the slit portions relative to the housing.
- The provided blocking actuator is more robust to forceful manipulation as compared to known blocking actuators. An example of such a manipulation is knocking with a hammer on an access control device which comprises the blocking actuator, in a direction parallel to the rotation axis, which is the movement direction of the sleeve. Due to the presence of the angle α between the first and second slit portions, the pin will stop the sleeve. Since the force applied is only a temporary impulse, the helical spring will move the sleeve back to its blocked position, without the blocking actuator ever being in a non-blocking position.
- In an embodiment, the slit in the sleeve has a substantially V-shaped form. In this embodiment, the slit only has two slit portions, but the slit may have more than two slit portions.
- In an embodiment, the angle α lies in a range of 80-90 degrees. More preferably the angle α is in a range of 85-87 degrees.
- In an embodiment the helical spring comprises two co-axial parts dividing the helical spring into a first helical part, a second helical part, and an intermediate helical part lying between the two co-axial parts.
- In a further embodiment the sleeve comprises a further slit arranged on the opposite side of the slit, the further slit being line symmetrical relative to the slit with respect to the rotation axis. In this way, the pin can be inserted through bot slits and be fixed at the housing on both sides of the sleeve which will result in a more stable pin construction.
- In an embodiment the electro-mechanical blocking actuator further comprises a movable blocking element coupled to the sleeve for blocking a locking means of an access control device. The blocking element may be rotatably coupled to the sleeve. In this way, forces on the blocking element created by the locking means, will cause the blocking element to rotate relative to the sleeve, thereby avoiding stress on and/or possible damage to the sleeve.
- The invention also relates to an access control device including a first part and a second part, wherein at least one of the parts is movably arranged with respect to the other part, the device comprising an electro-mechanical blocking actuator as described above, wherein the first part and the second part are connectable, particularly securable, to each other and/or disconnectable, particularly releasable, from each other by means of the blocking actuator.
- More particularly, the invention also relates to an access control device including a stationary part and a movable part, and provided with the electro-mechanical blocking actuator according to the invention. More particularly, the device according to the invention is characterized in that the movable part and the stationary part are securable to each other and/or releasable from each by means of the blocking actuator. Examples of an access control device are e.g. an electronically controlled key safe, a security escutcheon, a door lock, an industrial locking unit, a door handle and a cylinder lock. Such devices often have limited power sources. The blocking actuator has an indirect functionality within a mechanical construction of the access control device in order to save energy.
- Generally, such devices are manually operated by an authorized person who wishes access. The manual action may include e.g. rotating a handle, turning a knob or moving a sliding cover. The access control device according to the invention has advantages similar to the advantages of the blocking actuator according to the invention.
- With reference to the attached claims it is noted that all possible combinations of features mentioned in the claims are part of the invention.
- A detailed description of the invention is provided below. The description is provided by way of non-limiting examples to be read with reference to the drawings in which:
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Figure 1 is an exploded view of an electro-mechanical blocking actuator according to an embodiment of the invention; -
Figure 2 shows a perspective view of an embodiment of the helical spring; -
Figure 3 shows a perspective view of the blocking actuator in cooperation with a locking mechanism with the housing removed; -
Figure 4 is a cross section of the blocking actuator in cooperation with a locking mechanism according to the embodiment ofFigure 1 and3 ; -
Figure 5 shows a perspective view of the blocking actuator in cooperation with the locking mechanism in a situation wherein the blocking actuator is driven to unlock; -
Figure 6 shows a cross section of the blocking actuator wherein the helical spring is partly pushed in; -
Figure 7 shows a perspective view of the blocking actuator in cooperation with the locking mechanism in a situation wherein the blocking actuator is in an unlocked state; -
Figure 8 shows a cross section of the blocking actuator of the situation ofFigure 7 , wherein the helical spring is not pushed in; -
Figure 9 shows a perspective view of the blocking actuator in cooperation with the locking mechanism in a situation wherein the sleeve of the blocking actuator is driven to its locked position; -
Figure 10 shows a cross section of the blocking actuator of the situation ofFigure 9 ; -
Figure 11 shows a perspective view of a sleeve according to an embodiment; -
Figure 12 shows a projection of the slit onto the plane; -
Figure 13A, 13B and 13C show examples of slits which comprise two or more slit portions; -
Figure 14 shows the embodiment ofFigure 1-10 , wherein the T-shaped pin is blocked by the blocking pin; -
Figure 15 shows a part of a cross section of a key safe according to an embodiment, provided with the electro-mechanical blocking actuator in a blocking position, and -
Figure 16 shows a part of a cross section of a key safe according to an embodiment, provided with the electro-mechanical blocking actuator in a non-blocking position. - It is expressly noted that the disclosed embodiments are schematically depicted. The embodiments only represent examples. The same reference numerals have been used in the several embodiments for the same or corresponding elements and parts, however not all the elements and parts have been indicated in the several embodiments.
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Figure 1 is an exploded view of an electro-mechanical blocking actuator 1 according to an embodiment of the invention. The blockingactuator 1 comprises ahousing 2, aspindle 3 and anelectric driver 4 arranged to rotate thespindle 3 around arotation axis 5. The blockingactuator 1 further comprises a substantiallycylindrical sleeve 6 movably arranged between thehousing 2 and thespindle 3. Thesleeve 6 comprises aslit 7. Apin 8 is inserted through theslit 7 of thesleeve 6 and fixed to thehousing 2. Ahelical spring 9 comprising a plurality of windings is arranged around thespindle 3 and has its outer ends, or at least one of the outer ends, fixed to thespindle 3. The blockingactuator 1 comprises coupling means 10 for movably coupling one of the windings of thehelical spring 9 to thesleeve 6. In this embodiment, the coupling means comprise ahelical spring 101 and ahook 102. Thehelical spring 101 of the coupling means 10 can be arranged around thesleeve 6 at acollar 61.Figure 1 also shows a blockingpin 11 which can be coupled to thesleeve 6 in a preferably rotatable manner. -
Figure 2 shows a perspective view of an embodiment of thehelical spring 9. Thehelical spring 9 comprises twoco-axial parts helical spring 9 into a firsthelical part 93, a secondhelical part 94, and an intermediatehelical part 95 lying between the twoco-axial parts - During assembling the
helical spring 101 of the coupling means 10 is arranged around thesleeve 6 at thecollar 61. Next, thesleeve 6 is placed around thespindle 3 and thehelical spring 9. Thehook 102 of the coupling means 10 is hooked onto one of the windings of the intermediatehelical part 95. - When the
spindle 3 and thus thehelical spring 9 are rotated by theelectric driver 4, the hook will slide along the windings of the intermediatehelical part 95. Once thehook 102 reaches one of the twoco-axial parts helical spring 9 and thus thespindle 3 is stopped. - Due to the two
co-axial parts co-axial parts - For a proper operation of the blocking actuator no (electronic) start and end position detection is required. The
electric driver 4 is controlled by a fixed time period (e.g. 50ms). This time period may be chosen in a way that thesleeve 6 can make the stroke from the blocked to the unblocked position and vice versa. The end positions of thesleeve 6 will be determined by theslit 7 and thepin 8. Provided of course, that theelectric driver 4 is activated sufficiently long. When theelectric driver 4 is activated for an insufficient period of time, e.g. 10ms, thesleeve 6 is not yet moved sufficiently. The time required to move thesleeve 6 is not always exactly the same. For example, a buffered stroke may take more time than a non-buffered stroke. Because prior to driving it is not known to theelectric driver 4 whether there is a buffered or non-buffered movement to be made, a spacious activation period will be chosen. As a consequence, themotor 4 is almost always activated for a longer period than required to make a full stroke. - It is noted that an additional start and end position detection may be present, which would result a further reduction in energy consumption. For this purpose a small magnet may be placed in the
sleeve 6 in conjunction with sensors in the housing. - The
sleeve 6 is movable between a blocking position and a non-blocking position.Figure 3 shows a perspective view of the blockingactuator 1 in cooperation with alocking mechanism 30 with thehousing 2 removed. Thelocking mechanism 30 may be part of an access control device as will be explained below in more detail. Thelocking mechanism 30 comprises a T-shapedpin 31, aspring 32 and a blockingball 33.Figure 3 shows thesleeve 6 of the blockingactuator 1 in the blocking position in which the blockingpin 11 prevents movement of the T-shapedpin 31 caused by an external force on the locking mechanism. -
Figure 4 is a cross section of the blockingactuator 1 in cooperation with alocking mechanism 30 according to the embodiment ofFigure 1 and3 . As can be seen inFigure 4 , thehook 102 of the coupling means 10 is hooking into one of the windings of thehelical spring 9, more particularly of one of the windings of the intermediatehelical part 95. - If the
electric driver 4 rotates thespindle 3 and thehelical spring 9 in a first rotational direction, thehelical spring 9 will act on the coupling means 10 so as to drive thesleeve 6 in a first co-axial direction from the blocking position to the non-blocking position. If the electric driver rotates the spindle and the helical spring in a second rotational direction, opposite to the first rotational direction, the helical spring will act on the coupling means so as to drive the sleeve in a second co-axial direction from the non-blocking position to the blocking position, the second direction being opposite to the first direction. Thehelical spring 9 thus acts as a flexible thread between thespindle 9 and thesleeve 6. -
Figure 5 shows a perspective view of the blockingactuator 1 in cooperation with thelocking mechanism 30 in a situation wherein the blockingactuator 1 is driven to unlock, but the blockingpin 11 is held by theblocking mechanism 30. Due to the rotation of thespindle 3 and thus thehelical spring 9, a part of the helical spring will be pushed in. -
Figure 6 shows a cross section of the blockingactuator 1 wherein thehelical spring 9 is partly pushed in. In this case the secondhelical part 94 and the intermediatehelical part 95 are pressed in. Thelocking mechanism 30 that is holding the blockingpin 11 results in a fixed position of thehook 102. Driving thespindle 3 with thehelical spring 9 towards the non-blocking position than causes the firsthelical part 93 to be stretched out and the other helical parts to be compressed. The result is a buffered situation, in which the blockingactuator 1 will automatically switch to its non-blocking state, as soon as the force on the blockingpin 11 is released. -
Figure 7 shows a perspective view of the blockingactuator 1 in cooperation with thelocking mechanism 30 in a situation wherein the blockingactuator 1 is in an unlocked state with thehelical spring 9 in its released (i.e. not buffered) state. The blockingpin 11 is not blocking thelocking mechanism 30. -
Figure 8 shows a cross section of the blockingactuator 1 of the situation ofFigure 7 , wherein thehelical spring 9 is not pushed in. -
Figure 9 shows a perspective view of the blockingactuator 1 in cooperation with thelocking mechanism 30 in a situation wherein thesleeve 6 of the blockingactuator 1 is driven to its blocking position but it is blocked by thelocking mechanism 30. Due to activation ofelectric driver 4spindle 3 and thus thehelical spring 9 are rotated untilhelical spring 9 is pressed in as shown inFigure 10 , which shows a cross section of the blockingactuator 1 in the situation ofFigure 9 . As can be seen fromFigure 10 , both the firsthelical part 93 and the intermediatehelical part 95 are pressed in. The result is a buffered situation, in which the blocking actuator will automatically switch to its blocking position as soon as the blockingpin 11 in no longer obstructed by thelocking mechanism 30. -
Figure 11 shows a perspective view of asleeve 70 according to an embodiment. Thesleeve 70 comprises two V-shapedslits rotation axis 5. InFigure 11 atangent plane 80 is shown which is a flat plane touching thesleeve 70 at a point where theslit 71 changes direction. -
Figure 12 shows aprojection 81 of theslit 71 onto thetangent plane 80. As can be derived from theprojection 81, theslit 71 comprises two slitportions 71' and 71". These two slitportions 71' and 71" make an angle α which is smaller than or equal to 90 degrees. In a specific embodiment, the angle α is in the range of 80-90 degrees and is preferably between 85-87 degrees, such as 85 degrees. - The first and
second slit portions 71', 71" do not necessarily have to be straight lines, they may be curved.Figure 13A shows such an example. Furthermore, theslits Figure 13B and 13C show examples of such embodiments. The angle β may be smaller than or equal to 90 degrees. Adding more slit portions can reduce the free travel of the sleeve when an impulse force is applied to the access control device. - It is noted that the sleeve may comprise only one
slit 71, wherein thepin 8 will only extend from the housing through theslit 71, but will not extend through thesleeve 6. - Due to the specific form of the
slit 7, thepin 8 will force thesleeve 6 to turn when it is moved in the first or second co-axial direction by thehelical spring 9. Thesleeve 6 will turn around the rotation axis in rotational directions determined by the orientation of theslit portions 71', 71" relative to thehousing 2. - In the following the embodiment with the V-shaped
slit 7 is used to describe how the embodiments described provide an actuator that is less vulnerable for manipulation.Figure 14 shows the embodiment ofFigure 1-10 , wherein the T-shapedpin 31 is blocked by the blockingpin 11. So, inFigure 14 , a blocking position of the sleeve 6 (and thus of the blocking actuator) is shown.Figure 14 shows an arrow which indicates an impulse which may be created by a forceful attempt to manipulate the blockingactuator 1. An example of such a manipulation attempt is knocking with a hammer on an access control device which comprises the blockingactuator 1 in a direction parallel to the rotation axis, which is the movement direction of thesleeve 6; see the arrow F inFigure 14 . In the event that an impulse is applied to the blockingactuator 1 to move thesleeve 6 to a non-blocking position, thesleeve 6 will at most move to a position shown inFigure 14 . The impulse will be transferred to themovable sleeve 6, which will move in the direction towards theelectric driver 4. Due to the presence of the angle α thesleeve 7 will be stopped by the pin at a transition point between the twoslit portions 71' and 71" where theslit 7 makes an angle α which is less or equal than 90 degrees. Since the force applied is only a temporary impulse, thehelical spring 9 will move thesleeve 6 back to its blocked position, without the blockingactuator 1 ever being in a non-blocking position. - According to an embodiment, an access control device is provided comprising a first part and a second part, wherein at least one of the parts is movably arranged with respect to the other part. The access control device may be e.g. a key safe or a security escutcheon.
Figure 15 shows part of a cross section of a key safe having afirst part 201, being a slidable movable cover, and a second part, being aninner frame 202 of the key safe. So thecover 201 and theinner frame 202 are movably arranged with respect to each other. The device is provided with the electro-mechanical blocking actuator as described above. The first part and the second part are securable to each other and/or releasable from each other by means of the blockingactuator 1. As can be seen fromFigure 15 , the blockingactuator 1 is driven so that the blockingpin 11 is blocking the T-shapedpin 31. The T-shapedpin 31, due to the forces of thespring 32, pushes the blockingball 33 into acavity 203 of thecover 201. If someone tries to open thecover 201, thecover 201 will be forced into the direction indicated by anarrow 205. But due to the blockingball 33, the cover cannot be slid, so the key safe stays closed. Once the blockingactuator 1 is in the non-blocking position, seeFigure 16 , thecover 201 can be slid and will then force the blockingball 33 to move, which is possible in the situation ofFigure 16 . - So in summary,
Figure 15 and16 show a device wherein the first part is a stationary part and the second part is a movable part, and wherein the movable part and the stationary part are securable to each other and/or releasable from each other by means of the blocking actuator. - The electro-mechanical blocking actuator according to the invention may also be called the mechatronic blocking actuator or blocking actuator according to the invention. The blocking actuator and parts thereof can be made of any suitable material, such as metals, like stainless steel, aluminium alloys, copper alloys, or plastics, or composites of plastics.
- It will be clear to a person skilled in the art that the scope of the present invention is not limited to the examples discussed in the foregoing. Several amendments and modifications of the discussed examples are possible without deviating from the scope of the present invention as defined in the claims. While the present invention has been illustrated and described in detail in the figures and the description, such illustrations and descriptions are to be considered illustrative or exemplary only, and not restrictive. The present invention is not limited to the disclosed embodiments. Any variation to and combination of the described and/or depicted embodiments which can be understood and effected by a person skilled in the art of practicing the claimed invention, from a study of the figures, the description and the attached claims, is part of the invention. In the claims, the word "comprise" and conjugations thereof do not exclude other steps or elements, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims should not be construed as limiting the scope of the present invention.
Claims (10)
- An electro-mechanical blocking actuator (1) comprising:- a housing (2);- a spindle (3);- an electric driver (4) arranged to rotate the spindle around a rotation axis (5),- a substantially cylindrical sleeve (6) movably arranged between the housing and the spindle, the sleeve comprising a slit (7);- a pin (8) inserted through the slit of the sleeve and fixed to the housing;- a helical spring (9) comprising a plurality of windings arranged around the spindle and having at least one of its outer ends fixed to the spindle;- coupling means (10) for movably coupling one of the windings of the helical spring to the sleeve,wherein the sleeve is movable between a blocking position and a non-blocking position, and wherein, if the electric driver rotates the spindle and the helical spring in a first rotational direction, the helical spring will act on the coupling means so as to drive the sleeve in a first co-axial direction from the blocking position to the non-blocking position and
if the electric driver rotates the spindle and the helical spring in a second rotational direction, opposite the first rotational direction, the helical spring will act on the coupling means so as to drive the sleeve in a second co-axial direction from the non-blocking position to the blocking position, the second direction being opposite to the first direction,
wherein the slit (7) comprises at least a first and second slit portion (71', 71") , the second slit portion directly following the first slit portion at a transition point on the sleeve, and making an angle α relative to the first slit portion at the transition point, where α ≤ 90 degrees, wherein during movement of the sleeve in the first or second co-axial direction, the sleeve will also turn around the rotation axis in rotational directions determined by the orientation of the slit portions relative to the housing. - The electro-mechanical blocking actuator according to claim 1, wherein the slit in the sleeve has a substantially V-shaped form.
- The electro-mechanical blocking actuator according to any of claims 1 or 2, wherein the angle α lies in a range of 80- 90 degrees.
- The electro-mechanical blocking actuator according to claim 3, wherein the angle α lies in a range of 85-87 degrees.
- The electro-mechanical blocking actuator according to any of the preceding claims, wherein the helical spring comprises two co-axial parts dividing the helical spring into a first helical part, a second helical part, and an intermediate helical part lying between the two co-axial parts.
- The electro-mechanical blocking actuator according to any of the preceding claims, wherein the sleeve comprises a further slit arranged at an opposite side of the slit, the further slit being line symmetrical relative to the slit with respect to the rotation axis.
- The electro-mechanical blocking actuator according to any of the preceding claims, further comprising a movable blocking element (11) coupled to the sleeve for blocking a locking means of an access control device.
- The electro-mechanical blocking actuator according to claim 7, wherein the blocking element is rotatably coupled to the sleeve.
- An access control device comprising a first part and a second part, wherein at least one of the parts is movably arranged with respect to the other part, the device comprising an electro-mechanical blocking actuator according to any one of the previous claims, wherein the first part and the second part are securable to each other and/or releasable from each by means of the electro-mechanical blocking actuator.
- The device according to claim 9, wherein the first part is a stationary part and the second part is a movable part, wherein the movable part and the stationary part are securable to each other and/or releasable from each other by means of the electro-mechanical blocking actuator.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2013102A NL2013102B1 (en) | 2014-07-01 | 2014-07-01 | An electro-mechanical blocking actuator and an access control device. |
Publications (2)
Publication Number | Publication Date |
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EP2963212A1 EP2963212A1 (en) | 2016-01-06 |
EP2963212B1 true EP2963212B1 (en) | 2017-08-09 |
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Application Number | Title | Priority Date | Filing Date |
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EP15171202.3A Active EP2963212B1 (en) | 2014-07-01 | 2015-06-09 | An electro-mechanical blocking actuator and an access control device |
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EP (1) | EP2963212B1 (en) |
DK (1) | DK2963212T3 (en) |
ES (1) | ES2643114T3 (en) |
NL (1) | NL2013102B1 (en) |
Families Citing this family (3)
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CN106223730A (en) * | 2016-09-12 | 2016-12-14 | 杭州六孚智能科技有限公司 | Electromechanical integration tapered end |
CN106246003B (en) * | 2016-09-20 | 2018-11-27 | 东莞市锁之道科技有限公司 | A kind of motor drive mechanism for locking device |
EP3636861B1 (en) | 2018-10-12 | 2021-08-04 | SimonsVoss Technologies GmbH | Actuator for an electric lock and method of actuating an electric lock |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US6330817B1 (en) * | 2000-02-01 | 2001-12-18 | Harrow Products, Inc. | Anti-jam locking mechanism for electronic security system |
CN101324163B (en) * | 2007-06-11 | 2013-03-27 | 上海伙伴科技发展有限公司 | Cam lock and electrodynamic device thereof |
CN102953598B (en) * | 2011-08-17 | 2015-08-19 | 东莞市锁之道科技有限公司 | The motor drive mechanism of lock |
-
2014
- 2014-07-01 NL NL2013102A patent/NL2013102B1/en not_active IP Right Cessation
-
2015
- 2015-06-09 DK DK15171202.3T patent/DK2963212T3/en active
- 2015-06-09 EP EP15171202.3A patent/EP2963212B1/en active Active
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NL2013102B1 (en) | 2015-11-12 |
DK2963212T3 (en) | 2017-11-13 |
ES2643114T3 (en) | 2017-11-21 |
EP2963212A1 (en) | 2016-01-06 |
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