CN1697909A

CN1697909A - Electric strike assembly

Info

Publication number: CN1697909A
Application number: CNA038246805A
Authority: CN
Inventors: 安托尼·J·巴什福
Original assignee: Rutherford Controls International Corp
Current assignee: Rutherford Controls International Corp
Priority date: 2002-09-27
Filing date: 2003-09-25
Publication date: 2005-11-16
Anticipated expiration: 2023-09-25
Also published as: CN100422496C; CA2405642A1; CA2405642C; CN101413362A

Abstract

An electric strike includes a housing and a two-position mode selector for selecting a mode of the electric strike. Specifically, the two-position mode selector is operable from outside the housing, and the two-position mode selector is configured to allow the electric strike to selectively operate in a first mode, such as a fail-secure mode, or a second mode, such as a fail-safe mode.

Description

Electric strike assembly

Technical field

The present invention relates to door lock mechanism, relate more specifically to the electronic lock mechanism of usually said electric strike.

Electric strike, just said electronics door opener, electronics releasing device and electronics release ram are used to control and enter building or zone.Drive unit (for example electro-motor or solenoid) is used to locking or discharges rotatable retainer, preventing or to allow the release of a latch bolt, so that latching door or allow it to be opened.

Typically, electric strike has two patterns, (wherein door is in blocking during power cut for promptly one " stopping-closing (fail-secure) " pattern, just must trigger drive unit can be unlocked to allow door), with " stopping-safety (fail-safe) " pattern (wherein door is in released state during power cut, just must trigger drive unit to prevent a release).Some rams on the market only have a pattern, and just they are to stop-closing or stop-safety, and other is double mode, expect which pattern when just setter can be selected to install.

Background technology

A kind of known double mode electric strike for example is GEM type GK-300 and ROFO2400 serial model No., and it has a rack-mount solenoid, and this support is movable in the ram housing.Blocking element is directly connected to solenoidal plunger, the motion of locking retainer when being in its locked position of coupler at ram.Cooperate with groove the housing from accessibility first screw of hull outside, can be to limit support along its track that moves.When first screw was tightened, it was fixed to housing with support, and just support can not move.First and second holes are set on housing, alternately with also can align from second screw that hull outside arrives, therefore at each terminal position place along the support movement locus, all be arranged on the 3rd on support or the 4th screwed hole one and align, and second screw can insert in the first or second suitable hole and screw thread is screwed in the 3rd or the 4th visual hole with first hole or second hole.By select using which hole, setter can be configured to the GEM ram to stop-safety or stop-closing pattern.Yet doing like this is tediously long and thorny operation, needs correct mating holes, carefully removes and replace a screw, and carefully unclamp (not removing) another screw.

Needing a kind of electric strike, it can stop-safety and stop-closing more easily switching between the pattern, and it preferably provides other advantage that surmounts the prior art ram.

Summary of the invention

Consider foregoingly, the purpose of this invention is to provide a kind of electric strike of improvement, with further feature its be provided at stop-safety and stop-closing between the pattern fast and simple the selection.

Among the present invention, retainer pivots and is arranged in the housing.When being prevented from from its original position pivot, retainer hinders the motion that latch bolt (latch bolt) extends from door, and therefore door is locked.When retainer was allowed to pivot, latch bolt can be shifted retainer onto on one side, and therefore door can be opened.In order to prevent that retainer from pivoting, retainer has at least one adjacent surface, and when retainer was attempted to pivot, a latch surfaces of blocking element or a plurality of latch surfaces contacted (door is locked) or do not contact (door is unlocked) described adjacent surface.Blocking element can move between first (no power) position and second (energising) position by drive units such as for example solenoids.Blocking element and blocking element drive unit are installed in the support, and described support slidably is installed in the housing conversely, are used at two backing positions, just stop-closing the position and stop-motion between of home.Stopping-closing in the position, latch surfaces is relative with the adjacent surface of retainer in the no power position, and stopping-home in, only latch surfaces is relative with the adjacent surface of retainer when driver is switched on.In two backing positions which the two positions mode selector of She Zhiing determined to use when mounted, just ram be installed in stop-safe mode still stops-closing pattern.In preferred embodiments, mode selector be one can be at two separately rotations between the positions of 180 degree, the eccentric wheel that can arrive from hull outside.

Ram preferably also has a latch bolt control arm that can be pivoted in the housing.When latch bolt was in appropriate location in the ram, just when door was closed, plate that rotates the latch bolt control arm of latch bolt depresses made cam contact with the shift knob of microswitch, indicate thus open or close.

Ram preferably also has the retainer microswitch that is arranged in the housing, and cooperates when being in its original position at retainer or being in its position of rotation with indicator cutout (indicator cutout) on being arranged on retainer, the opening of indication door.By under the surface pressure of retainer or do not depress the shift knob of retainer microswitch, the retainer microswitch is activated when retainer is in a position, and is not activated when another retainer position.

The ram assembly comprises a lip bracket that is connected to housing, to allow on-the-spot size adjustment.Lip bracket preferably has the forming face that cooperates with similar forming face on the housing, so that the progressively adjusting of lip bracket with respect to the housing relative position to be provided, and when lip bracket is secured to housing lip bracket to the rigid locking of housing.In preferred embodiments, use one and be specially zigzag configuration, it will be discussed in more detail below.

As the anti-invasion character in the preferred embodiment, in order to prevent that someone from inserting something and also opening door thus to attempt removing blocking element, retainer be configured as between itself and housing, have very little or very close to each other, and a flange is set catching any insert in this external housing, and retainer is shaped as the zone with any insert directed flange.

In the detailed description below, further feature of the present invention will be described or will become obvious.

Description of drawings

For the present invention can be expressly understood more, as an embodiment, its preferred embodiment is described in detail referring now to accompanying drawing, wherein:

Fig. 1 is the decomposing rearview according to the ram of preferred embodiment;

Fig. 2 is and the corresponding local assembled view of Fig. 1 that wherein blocking element, solenoid and support are assembled;

Fig. 3 is and the corresponding further assembled view of Fig. 1 and 2 that wherein blocking element, solenoid, support and retainer have been assembled in the housing;

Fig. 4 is and the corresponding view of Fig. 3, but has also shown lip bracket and panel;

Fig. 5 is and the corresponding view of Fig. 4 to have shown the housing unit with the lip bracket assembling;

Fig. 6 is and the corresponding view of Fig. 5, has shown the assembly of finishing;

Fig. 7 is the decomposition diagram that is similar to Fig. 1, but has shown the front of preferred embodiment;

Fig. 8 is and the corresponding view of Fig. 7, is further assembled;

Fig. 9 is and the corresponding view of Fig. 8, is assembled fully;

Figure 10 is a sectional top plan view that the zigzag that is presented between housing and the lip bracket engages;

Figure 11 is the view of a demonstration support, solenoid, blocking element, mode selector and mode selector biasing spring;

Figure 12 is and the corresponding stereogram from different perspectives of Figure 11;

Figure 13 is the stereogram of support only;

Figure 14 is and the corresponding stereogram from different perspectives of Figure 13;

Figure 15 is the stereogram of blocking element;

Figure 16 stops-closing and stops-stereogram of safe mode selector;

Figure 17 is the elevation of the mode selector of Figure 16;

Figure 18 is the stereogram of optional mode selector;

Figure 19 is the elevation of optional mode selector;

Figure 20 is the stereogram of latch control arm;

Figure 21 is a cross-sectional end view, has shown when the latch control arm cam of latch control arm during to inner rotary;

Figure 22 is a cross-sectional end view, has shown the latch control arm cam when the latch control arm is depressed triggering latch control microswitch;

Figure 23 A-23E has shown a series of latch control operation when door is closed, and from Figure 23 A position, latch bolt is near ram herein, and to the position of Figure 23 E, latch bolt is elongated fully and kept by retainer herein;

Figure 24 is in to stop-front sectional view of the ram of safe mode, and solenoid no power and its blocking element are in the position that allows the retainer rotation;

Figure 25 is and the corresponding view of Figure 24 that solenoid energising and its blocking element are in the position that prevents the retainer rotation;

Figure 26 is the front sectional view that is in the ram that stops-closing pattern, and solenoid energising and its blocking element are in the position that allows the retainer rotation;

Figure 27 is and the corresponding view of Figure 26 that solenoid no power and its blocking element are in the position that prevents the retainer rotation;

Figure 28 is a section end view, has shown previously described each member and especially anti-profile of invading;

Figure 29 is the phantom drawing of optional embodiment, illustrates the solenoid of a pushing-type solenoid rather than pull-alongs;

Figure 30 A and 30B are lateral view and rear elevation, have shown the optional mode selector that uses a two positions bar respectively, to stop-the safe mode demonstration;

Figure 31 A and 31B are lateral view and rear elevation, and be corresponding with Figure 30 A and 30B, shows to stop-closing pattern;

Figure 32 A and 32B are lateral view and rear elevation, have shown the another kind of optionally mode selector that uses a two positions slide block or button respectively, to stop-the safe mode demonstration; And

Figure 33 A and 33B are lateral view and rear elevation, and be corresponding with Figure 31 A and 31B, shows to stop-closing pattern;

Fig. 1-6 has shown the progressively formation of ram when observing from behind; Fig. 7-9 is similar, but observes from the front.

The specific embodiment

In a preferred embodiment of the invention, retainer 1 is arranged in the housing 2 pivotally, and can between position of rotation and original position (optimum), pivot referring to Figure 23 A, latch bolt 3 at described position of rotation place door 4 can remove to open door from ram, in described original position, if retainer is prevented from moving, then this retainer will stop removing of latch bolt and thereby keep door lock to close.When retainer was allowed to pivot, latch bolt can be shifted retainer onto on one side, and therefore door can be unlocked.Retainer pivots on two gudgeons 6 that are in its relative end, and described gudgeon is fitted in the groove 8 in the housing (referring to Fig. 7), and remains on herein (referring to Fig. 4) by the surface on the lip bracket 12 10.Retainer by a for example anticorrosive torsion spring 14 of suitable biasing device towards its original position bias voltage.

In order to make the door can locking, just in order to make retainer can be prevented from pivoting, retainer has at least one and preferred a plurality of adjacent surface 16, when retainer is attempted to pivot, the latch surfaces 18 of blocking element 20 and described adjacent surface or relative (door is by locking) or not relative (door is unlocked).In preferred embodiments, there are two latch surfaces 18, but clearly, limited by tangible space constraint, can only have one, perhaps can be more than two.Blocking element can move between the primary importance (not energising) and the second place (energising) by drive unit, and drive unit is solenoid 22 for example.In preferred embodiments, solenoid is the solenoid of " drawing " formula, though also can use the solenoid of " pushing away " formula, as described in below and as graphic in Figure 29.Solenoid has the electronics feed line (not shown) of pulling out and arrive external terminal 26 in enclosure interior.Preferably but not necessarily, solenoid is double winding and has four lines, so that the compliance of any connection 12 or 24 volts of DC or AC to be provided.For graphic purpose, solenoid is shown as does not have its typical insulating boot.

Blocking element 20 and solenoid 22 are installed in the support 30.The biasing force of solenoid pulls plunger 32 antagonistic springs 34, spring 34 are preferably made by being used for erosion-resisting stainless steel.Plunger has a disc-shaped part 36 and a buffer area (relief area) 38 at its far-end, and described buffer area fits in the groove 40 in the plate that is in the blocking element end.Therefore this connects together blocking element with the motion of plunger, when solenoid is driven, blocking element is by towards solenoid pulls, thereby the pattern of selection when installing, and mobile latch surfaces 18 enters or the engagement of disengaging and retainer adjacent surface 16.Stopping-closing in the pattern, solenoidal driving makes latch surfaces break away from engagement (their lockings normally in the pattern of cutting off power just, therefore door is by locking), yet stopping-safe mode in, solenoidal driving makes latch surfaces engagement (just they normally do not have locking in the pattern of cutting off power, and therefore door is unlocked).

Blocking element at one end by the piece 42 in solenoid plunger 32, the groove 43 the other end is in guide rail 44 by one on rear side below and in the front side by projection 46 guiding, described protruding 46 extend below the guider on the support 47.

The support 30 that blocking element 20 and solenoid 22 are installed therein slidably is installed in the housing 2 conversely, is used at two backing positions, just stop-closing the position and stop-of home between motion.Support and by in the maintenance in position of front and back, and has alignment protrusion 49 by being trapped between housing and the back plate 48, and they cooperate with alignment slots 50 in being arranged on afterwards plate and housing.Back plate is fixed to housing by screw 52, and described screw 52 passes the hole 53 of back in the plate and enters in the hole 54 in the housing.

Stopping-closing in the position, latch surfaces 18 is relative with the adjacent surface 16 of retainer in the no power position, and stopping-home in, latch surfaces only when driver is switched on the adjacent surface 16 with retainer relative.The position of two retainers determine using of the two positions mode selector of eccentric wheel 60 for example, just, ram be installed in stop-safety still stops-closing in the pattern.Described pattern is set when mounted by setter.

In preferred embodiments, mode selector 60 can rotate between the position of two 180 degree of being separated by by dado hear 61, and described dado hear 61 passes hole 68 protrusions in the housing and therefore can arrive from hull outside.Preferred mode selector has an eccentric wheel disc portion 63 and a pin 62 that extends from its central authorities.Use screwdriver even minor coin with described Rotate 180 degree, cause eccentric wheel disc portion 63 and pin 62 to be in two of separating in the position.Because disc portion 63 fits in the groove 64 in support 30 back sides, its displacement that is caused by the selector rotation causes support to slide into another position from a position in housing, just slides into and stops-home from stopping-closing the position.In pin 62 grooves 65 that are fitted in the support 30, and rely on and to act on the pin so that it towards the spring 72 of the suitable terminal biasing of groove 65, is used for mode selector is remained on its selected any position.The preferred size that is provided with is so consequently carried by disc portion 63 rather than by pin 62 from any load of support.

The preferred embodiment of mode selector need be installed from enclosure interior.In the optional embodiment shown in Figure 18 and 19, mode selector 60 ' has the pin 62 and a cylindrical part 69 of biasing from the head.This selector can insert from hull outside by hole 68, but needs in the groove 70 of clip (not shown) in cylindrical part installation internally, comes off after it preventing.In this optional embodiment, pin 62 any load of bearing itself from support.

The two positions mode selector is a key feature of the present invention, and it provides one to make setter simply by rotate the very simply device that selector switches between two patterns.

In case selector is in the position of hope, wish very that certainly it remains on there.Therefore, in preferred embodiments, provide a biasing device so that selector is subjected to bias voltage with in the arbitrary select location that remains on two position.In preferred embodiments, described biasing device is a spring 72, and it is set to towards arbitrary terminal position pushing pin (this moment, 90 degree ground promoted to become roughly with the diameter line of drawing between two end points), referring to what preferably illustrate in Figure 11 and 12.(in Figure 12, if showing that spring is in exists pin 62 its positions that will be in, it in fact will be released and cross described groove although there is not pin, because it pushes away pin the spring position that illustrates.) spring 72 is for being installed in the torsion spring on the bar 74 in preferred embodiments, but significantly, it can be other any suitable scheme, comprises for example being configured to the leaf spring that works in equidirectional.

With reference now to Fig. 7,8 and 20-22,, housing further has groove 80 in its front, be used for supporting pivotly latch control arm 82.The latch control arm is generally elongated, has first end that has extension 83, has door latch bolt plate 84 at the far-end of described extension 83.In the opposite end of described arm is microswitch cam 85.Therefore when door latch bolt is present in the ram, it will inwardly press described plate, and rotate the latch control arm, so microswitch cam triggers microswitch 86 then, specifically referring to Figure 21 and 22.Cover 87 protection microswitches.Latch control arm 82 is by the outside bias voltage of latch arm biasing device of for example torsion spring 88 (referring to Fig. 7).

Figure 23 A-23E has shown a series of latch control operation when door 4 is closed, and from the position of Figure 23 A, latch bolt 3 is near ram herein, and to the position of Figure 23 E, latch bolt extends fully and kept by retainer herein.In Figure 23 A, door latch bolt is still in the outside of ram and retainer, and latch bolt plate 84 is in its raised position.In Figure 23 B, door latch bolt contact retainer and begin to be withdrawn in the door, Figure 23 C has shown that door latch bolt is fully retracted in the door, and Figure 23 D has shown that door latch bolt just passed retainer and begun to extend once more the contact latch bolt plate.In Figure 23 E, door latch bolt is pressed onto its depressing position with latch bolt plate, makes cam 85 activate microswitch 86, thereby allows the state of remote monitoring door.Be derived from early stage model, some details among these figure are not consistent with preferred embodiment, but principle is the same.

Panel 90 is fixed to lip bracket 12 by the screw (not shown), and described screw passes the hole 93 in the panel and enters in the hole 94 in the lip bracket, and uses the screw that passes installing hole 95 that ram is fixed to the side door post.Face plate configuration can change as required, to be fit to various novel or existing side door post profiles.Lip bracket preferably has forming face 96, and it cooperates with the face 97 of similar profile on the housing, thus with provide progressively adjusting with the lip bracket rigid locking to housing.Lip bracket is fastened to housing with the desired depth by the adjustment of screw (not shown), and described screw passes hole 110 in the lip bracket and enters in the hole 111 in the housing.Profile preferably as shown in Figure 10, Hu Bu zigzag face just, fitting face (is just opened in the direction of door in pulling) vertically or near normal in the outside direction that moves with respect to lip bracket at the antagonism housing.Lip bracket can have a plurality of change in size to adapt to the retainer (perhaps certainly being its any other size that may adopt) of 1/2 inch or 5/8 inch.

In order to survey the retainer position in the ram definitely, retainer 1 advantageously has one and is set to the indicator cutout 98 that cooperates with retainer microswitch 99, therefore the retainer microswitch is activated when retainer is withdrawn fully, and closes in other optional position of retainer.Cutout causes microswitch not to be activated when retainer is in its original position, but the rotation of retainer causes the inclined-plane of cutout outside to contact with microswitch, with its triggering.This provides and has been used to add up or indication that the door of other purpose is opened.

Figure 24 and 25 shown that being in it stops-ram of safe mode, and retainer release when the solenoid no power just.Figure 24 has shown the solenoid no power, and Figure 25 has shown its energising.Latch surfaces 18 is not alignd with retainer adjacent surface 16 (door is free) in last position as can be seen, and in one position, back they alignd (door is locked).

Figure 26 and 27 is similarly, but has shown and stop-closing pattern, solenoid energising and door release in Figure 26, and solenoid no power and door are locked in Figure 27.

With reference now to Figure 28,, as the anti-invasion character in the preferred embodiment, in order to prevent that someone from inserting thin and flexible something is attempted mobile blocking element and opened door thus, retainer be configured as between itself and housing, have very little or very close to each other, and catcher 100 is set in this external housing to stop any insert, and retainer has a flange 102, and it is shaped as the zone with any insert guiding catcher.

Be appreciated that above-mentioned explanation only described preferred embodiment with the purpose of example.Whether many variations of making on basis of the present invention it will be apparent to those skilled in the art that, and this variation falls into as described and desired spirit of the present invention, no matter should spirit be expressed.

For example, except top clearly may changing of narration, Figure 29 has shown the pull-alongs of a pushing-type solenoid 22 ' rather than preferred embodiment.Blocking element is by blocking element alignment pin 106 guiding, and the spring on the alignment pin 108 with blocking element towards the solenoid bias voltage.

Should be appreciated that also the two positions mode selector can differently be disposed, though eccentric arrangement is preferred.For example, can be little pivoted a two positions bar, have a pin from its protrusion, have with preferred embodiment in two identical terminal positions, and any one spring configuration that bar is biased into two positions.Perhaps can be a little slide bar, have pin, also have identical two terminal positions and spring bias voltage from its protrusion.Perhaps, not that spring is biased into terminal position, can be the recess or the ball-spring ratchet or the similar item that can engage selector element.This example diagram in Figure 30 A-30B that some are other, key is that each mechanism causes 62 to move to the other end from an end, thereby part support 30 moves to another from a mode position, pin or mode selector preferably by any suitable device bias voltage to rest on then in the selected position.In Figure 30 A-31B, mode selector 60 ' is a little bar that can pivot between the two positions, has as extending in the preferred embodiment in the housing and the pin 62 of splice holder 30.In Figure 32 A-33B, mode selector 60 " be a little button that can slide between the two positions, the pin 62 that has splice holder 30 equally.

Some additional features or advantage are as follows:

A. ram is applicable to a left side or the installation of right hand jamb post comparably.

B. because the pivot retainer is installed by gudgeon, do not need independent hinge.

C. use the horizontal controllability of housing with respect to lip bracket, it is laterally adjustable for physics variable retainer position being installed.

D. ram has compact design.Typically be the 1-3/16 inch for 5/8 inch retainer (maximum 3/4 inch locking projection) gross thickness, and be the 1-1/16 inch for 1/2 inch retainer (maximum 5/8 inch locking projection).

The selection of material is not the present invention's a part itself.Yet retainer is preferably metal injection moulding, model casting or the bar of iron and extrudes, and has suitable coating so that erosion-resisting retainer to be provided.Support advantageously for metal injection moulding or model casting and suitably carry out surfacing so that have corrosion resistance.Housing is preferably model casting or die casting and/or powdered-metal and is shaped, and is suitably electroplated so that the housing of anti--corrosion to be provided.Blocking element is preferably made so that the material of non--magnetic to be provided by stainless steel, and is advantageously carried out surfacing, for example electroplates, and is used for minimum co-efficient of friction.The latch control arm advantageously is die casting or model casting part.Lip bracket is preferably die casting and/or model casting part.Advantageously, provide surfacing attractive in appearance.Panel has sufficient intensity by stainless steel or other and constitutes with the material that obtains surfacing attractive in appearance, and it can bear damage required between the operating period.

Ram is applicable to the building that needs to export/enter the mouth control, for example as commercial building, hospital, warehouse and the educational alternative of non-limiting example.For example, when ram was connected to the building safety system, latch and retainer control device were used for traffic information.

Claims

One kind be used for the door electric strike, comprising:

Housing;

Be arranged on the retainer in the described housing pivotally, when being prevented from pivoted, this retainer is orientated as and is prevented that door latch bolt is drawn out, and when being allowed to pivoted, this retainer is orientated as and allowed described door latch bolt to be drawn out;

Slidably be arranged on the support in the described housing;

Slidably be arranged on the blocking element in the described support, it has the latch surfaces relative with the adjacent surface of described retainer, so that selectively stop described retainer to rotate, described blocking element can move between locked position of coupler and non-locked position of coupler, in described locked position of coupler, stop described retainer to rotate, and in described non-locked position of coupler, allow described retainer to rotate biased one of them in described position of this blocking element;

Can be from the two positions mode selector of described hull outside operation, be used to make described support stopping-closing and stopping-slidably moving between the home, when described support is in described stopping-when closing in the position, described latch surfaces hinders the rotation of described retainer in described biased position, and when described support was in described stopping-home, described latch surfaces allowed the rotation of described support in described biased position; And

Be installed in the drive unit in the described support, be used for moving described blocking element and make it, with locking or the described retainer of release away from described biased position.
2. electric strike as claimed in claim 1, wherein said mode selector include can the Rotate 180 degree eccentric wheel, described eccentric wheel has from this takes turns extension to engage the pin of the groove the described support, the eccentric motion of described pin moves described support thus between two end positions, described two end positions are corresponding to the opposite end position of described pin when 180 degree rotate.
3. electric strike as claimed in claim 1 further comprises the device that is used for described mode selector is biased into arbitrary position of selected described two positions.
4. electric strike as claimed in claim 2 further comprises the device that is used for described mode selector is biased into arbitrary position of selected described two positions.
5. electric strike as claimed in claim 4, the wherein said described device that is used for the described mode selector of bias voltage is a spring, and it is positioned in the directions that the diameter line of drawing between the end points with respect to described pin 180 degree strokes becomes 90 degree approximately and acts on the described pin.
6. electric strike as claimed in claim 1, further comprise the latch control lever arm that is installed in pivotally in the described housing, described latch control lever arm has the extension that extends from this arm, this extension has plate, this plate is positioned as when latch bolt is present in the described ram and can be depressed, thus described latch control lever arm is turned to its biased position from original position, whether the described feasible cam that extends from described latch control lever arm that rotatablely moves progressively contacts the shift knob on the microswitch, indicate latch bolt to put in place thus.
7. electric strike as claimed in claim 1 further includes lip bracket, and this lip bracket can be fastened on the described housing along any position in a plurality of possible relative positions, interface; And panel, this panel is securable to described lip bracket and is securable to the side door post to be used to install described ram.
8. electric strike as claimed in claim 7, wherein said interface also has from the sawtooth projection of the outstanding complementation of described housing and described lip bracket, described projection has fitting face, and this fitting face is basically perpendicular to described interface, outwards moves with respect to described lip bracket to stop housing.
9. electric strike as claimed in claim 1, wherein said drive unit are the pull-alongs solenoid that is connected to described blocking element, and described blocking element is biased away from described solenoid.
10. electric strike as claimed in claim 1, wherein said drive unit are that pushing-type solenoid and described blocking element are biased towards described solenoid.
11. electric strike as claimed in claim 1, wherein said retainer and described housing are shaped as like this, substantially it is very close to each other between them when described retainer is in original position by described blocking element locking, and wherein said retainer has flange, described housing has catcher, described flange is positioned as any flexible insert described catcher that leads, and described catcher stops further and inserts.