CN101481965B - Electric device for cam lock - Google Patents

Abstract

The invention relates to an electric device for rotating a lock bolt, comprising a motor (41), a screw rod (42) coaxially connected with the motor and a back follower (50) which is connected with the crew rod and is rotated along with the motor to make linear movement. The electric device is characterized in that the back follower comprises a sleeve pipe (56) and a buckle (61), wherein the sleeve pipe (56) is matched and rotated along with the screw rod to make linear movement, the inner hole (55) of the sleeve pipe (56) is in sliding fit with the outside diameter of the screw rod (42), and two pinholes (43 and 44) which are axially perpendicular to the inner hole (55) of the sleeve pipe are arranged at the sleeve pipe (56); and two legs (63 and 64) of the buckle (61) are respectively caused to penetrate through the two pinholes (43 and 44) of the sleeve pipe and are in threaded fit with the screw rod (42), thereby causing the buckle (61) and the sleeve pipe (56) to make the linear movement along with the screw rod (42) during the rotation thereof.

Description

A kind of electric device for turning-bolt lock

The application is to be that June 11, application number in 2007 are 200710041833.2, are entitled as the dividing an application of Chinese invention patent application of " a kind of turning-bolt lock and electric device thereof " applying date.

Technical field

The present invention relates to coded lock, more particularly, relate to the electronic password lock that a kind of strongbox is used.

Background technology

In prior art, for controlling the coded lock lock body of safe door, conventionally the square lock bolt or the wedge shape dead bolt that directly go out directly entered in employing.Withdrawal at the lower dead bolt of normality (lock-out state) is defined, and this dead bolt forms obstruction to Door handle or bolt, the restriction that releasing is regained dead bolt is by inputting correct password and made an electric device action be achieved after predefined program validation on strongbox cipher input, and dead bolt to be reset to normality (lock-out state) be by due to an action of reset spring.

Patent US5142890, US5134870 and US6786519 disclose several turning-bolt lock structural concepts.In this such scheme, dead bolt is shaped as D type (semicircle or 180 degree are fan-shaped), the extension spring that employing is located between lock box inwall and dead bolt is put (lockset position of coupler) to the back-moving spring that produces position (upper lock position) as dead bolt from turning carry, to the locking of dead bolt, is that head by the action component of a controlled electromagnet (solenoid) (iron core rod) stretches out and directly to being located at a breach of dead bolt, forming and hinder and realization afterwards.

There is following shortcoming in technique scheme:

When running into illegal brute force and unblank situation, very large external force is directly delivered to dead bolt by Door handle or bolt, and dead bolt is directly passed to this external force on the head of the action component (iron core rod) of electromagnet (solenoid), because the head of dead bolt and this action component is that line contacts, stress is very concentrated, easily causes the damage of action component and electromagnet (solenoid) or lock body part;

D type dead bolt shape and size are larger, and the reset tension spring of joining also needs larger space flexible, and the two occupies larger lock body inner space, cause dwindle lock body volume or in lock body, increase miscellaneous part very difficult.

In addition, for controlling the prior art of the coded lock of safe door, there are the following problems for the electric device adopting; Adopt the electromagnet electric quantity consumption of unidirectional (by spring reset) large, this point is very large shortcoming to the puzzle lock for safe with dry cell power supply; If employing bidirectional electromagnet, except complex structure, also needs a larger installing space.

Adopt motor and will rotatablely move and convert straight-line mechanism and screw mandrel screw thread structure to, due to the restriction of lock body inner space, conventionally use the high-speed motor of small size, the screw mandrel screw thread structural volume of using is also very little, the in the situation that of High Rotation Speed, screw mandrel and screw thread are difficult to once aim at button, as long as the stuck motor lock-rotor phenomenon that causes of screw mandrel screw thread will occur in misalignment, and then damage screw mandrel and screw thread or damage motor.

Summary of the invention

Object of the present invention aim to provide a kind of be subject to preventing when illegal brute force is unblanked situation electric device in lock body directly destroyed, can be by this illegal powerful turning-bolt lock that rationally decompose to a plurality of positions of lock body; And provide a kind of electric device that easily makes on screw mandrel screw thread button and avoid motor lock-rotor.

Technical scheme of the present invention comprises:

A kind of turning-bolt lock, it comprises: a lock box with at least one breach, the lid matching with this lock box, one can be produced to latched position and turn the dead bolt that proceeds to enable possition from breach, one controllably stops the locking device of dead bolt from latched position to enable possition indentation, and one can make dead bolt from enable possition, be reset to the flexible member of latched position, wherein: described locking device comprises a block and an electric device, described block has a cylinder, this cylinder packs in the first chute that is located at correspondence position in described lock box and with it and forms and be slidably matched, at dead bolt in latched position, the first facade of cylinder is relative with dead bolt the first facade plane, the second facade of cylinder is relative with the first facade plane that is located at the follower head on electric device, other facade of this follower head is relative with the corresponding facade plane of the second chute in being located at lock box, thereby dead bolt is limited to latched position, at electric device, obtain and allow to unblank after mandate, follower on it moves and makes the second chute vacate the space that can make columnar part enter to indentation direction, under external force dead bolt to described enable possition, turn into, force in the second chute space that cylinder the first facade enters columnar part to have vacated, and then dead bolt can turn and proceeds to enable possition simultaneously, on described block, be also provided with a groove, on dead bolt, be provided with a projection with this groove correspondence position, after described external force is cancelled, flexible member makes dead bolt reset to described latched position from described enable possition, and the groove that now projection on dead bolt enters on block drives block to reset.

In technique scheme, dead bolt is fanning strip, its fan-shaped angle is between 90 degree to 110 degree, which is provided with the axis hole being slidably matched with the axle that is located at lock box correspondence position, dead bolt the second scallop facade bears external force, and the first scallop facade is passed to this external force the first facade of the cylinder on block by plane contact.

Further, on described lock box and lid and dead bolt correspondence position, be respectively equipped with the first guide rail and the second guide rail, in lid, be also provided with the axis hole matching with axle, for to the restriction of dead bolt and guiding.

In technical solution of the present invention, be located at the circular cylinder that the cylinder on block is part, the first chute that is located at lock box correspondence position consists of an external cylindrical surface and an inner cylinder face concentric with this circular cylinder and that be slidably matched; The first facade of cylinder bears the external force of transmitting by contacting with dead bolt the first facade plane, this external force is contacted and is passed to sliding part head by the second facade of cylinder and the first facade plane of described sliding part head, and the second facade of sliding part head and the 3rd facade pass to external force lock box again by the second chute; Described block has a cylinder that is located at the circular cylinder top of part, and the groove being located on this cylinder is the sector grooves of arc-shaped edges opening, on dead bolt, is cylindrical with the set projection of groove correspondence position.

Further, at described lid, be provided with one and be loaded on circular cylindrical cavity cylindrical on described block and that be slidably matched with this cylinder, for further location and the guiding to block.

In technical solution of the present invention, described flexible member is a biasing spring, its first ring spring is loaded on the axle of lock box, the second ring spring is loaded on and is located near another axis of a cylinder of axle, free end is fastened in the groove on described dead bolt correspondence position, so that dead bolt is applied, has the power of tending to latched position rotation.

In technical scheme of the present invention, a kind of electric device for turning-bolt lock or other Safe lock is also provided, it comprises: motor, with the coaxial screw mandrel being connected of this motor and be connected with this screw mandrel and the follower of traveling priority with revolution, it is characterized in that, described follower has a solid polyhedron head, this head can be put into and is located at the second chute of described lock box and is slidably matched with it, relative with the second facade plane of described cylinder when described follower extended position, other facades of this head are relative with corresponding facade plane in the second chute.

In technique scheme, described follower comprises a casket body, this casket body has a solid head, its head first facade is relative with the second facade plane of described cylinder when described follower extended position, and its head second facade is relative with corresponding facade plane in the second chute respectively with the 3rd facade; In the cavity of casket body, be equipped with one and match with screw mandrel and rotate and the sleeve pipe of traveling priority with this screw mandrel, this sleeve pipe drives casket body to move while moving.

Further, the endoporus of described sleeve pipe is a unthreaded hole being slidably matched with screw mandrel external diameter, on sleeve pipe, be provided with two with the axial vertical aperture of casing tube internal hole, the diameter of two apertures just in time passes respectively the two legs of a buckle, after this buckle penetrates above-mentioned two apertures, its two legs is stuck in the wire rod thread of correspondence position effectively, when screw mandrel rotates, this buckle and sleeve pipe are made traveling priority thereupon, and then drive casket body to move.

Preferably, two cylinders that can also stretch out at described sleeve pipe two ends and on be respectively installed with spring, the other end of spring is limited by casket body cavity top plane, the other end of spring limits a by casket body cavity end plane

In technical solution of the present invention, at described lock box, be provided with for the fixed leg of microswitch is installed, when turning, dead bolt proceeds to enable possition, just in time touch described microswitch, make it to disconnect or closure; Also at described lock box, be provided with for the fixed leg of control circuit board is installed, and for breach and the breach of mounting electrical connector.

In technical solution of the present invention, the installing hole arranging on lock box and the installing hole arranging on lid have identical counterbore, and the mode that lock body can be contacted with door-plate with its lock box face is installed, and the mode that also can contact with door-plate with its lid face is installed.

Adopt technique scheme, the present invention compared with existing turning-bolt lock, have the following advantages:

1. adopt block and slip rotational structure thereof, in the mode of face contact, bear external force and suffered power is delivered to lock box in the mode of face contact, bear and transmit the electric device follower of external force and the motor drive shaft of electric device and screw mandrel and adopt spring to be connected, thereby prevent the destruction of external force to electric device.

2. in this external force, by dead bolt, to block and be delivered to the follower solid head of electric device by block after, pass to again lock box, in this process, external force is at least broken down into the power of both direction, reduce stress and concentrated, improved on the whole the security performance of lock body.

3. adopt biasing spring structure that the planar dimension of dead bolt is dwindled, solved the extension spring larger problem that takes up space of using simultaneously.

4. disclosed electric device, arranges structure that buckle coordinates with wire rod thread and employing and at sleeve pipe two ends, arranges and lead and the structure of buffer spring is solved the stuck problem of motor lock-rotor that causes of screw mandrel owing to adopting on sleeve pipe.

5. in lock body, circuit board can be set, electric connector, microswitch etc., dynamo-electric in conjunction with tight, highly versatile.Latch mechanism part used is few, simple in structure, is easy to processing and installs.

Accompanying drawing explanation

In order to allow those skilled in the art further understand the present invention, below in conjunction with accompanying drawing, described in detail.

Fig. 1 is that the present invention is at the structural profile schematic diagram of upper lock position;

Fig. 2 is that the present invention is at the structural profile schematic diagram of lockset position of coupler;

Fig. 3 is stop block structure schematic diagram of the present invention;

Fig. 4 is lock bolt structure schematic diagram of the present invention;

Fig. 5 is biasing spring schematic diagram of the present invention;

Fig. 6 is dead bolt of the present invention, biasing spring and lock box assembly relation schematic diagram;

Fig. 7 is electric device schematic diagram of the present invention;

Fig. 8 is electric device partial cutaway schematic of the present invention;

Fig. 9 is casket body structure schematic diagram of the present invention;

Figure 10 is screw structure schematic diagram of the present invention;

Figure 11 is figure sleeve structure generalized section of the present invention;

Figure 12 is sleeve structure schematic diagram of the present invention;

Figure 13 is locking box structure schematic diagram of the present invention;

Figure 14 is lid structural representation of the present invention.

The specific embodiment

From Fig. 1 and Fig. 2, can find out that fan-shaped dead bolt 20 packs on the axle 110 in lock box by the axis hole 24 it, can pivot within the scope of 90 degree left and right.The planar thickness of the height of the circular cylinder 31 of block 30 and the height of the first chute 130 and dead bolt 20 is substantially approaching, and its motion is also carried out in same plane.

In conjunction with Fig. 3 and Fig. 4, when assembling, first dead bolt 20 is packed into, then the circular cylinder of block 30 31 is packed into the first chute 130 in lock box, this chute is comprised of with an inner cylindrical wall face 132 that is located at its opposite the semi-cylindrical 131 being located in lock box, distance between the two is just in time the annulus width of the circular cylinder 31 of block 30, but need to guarantee the slip cooperating relationship between them.Cylinder 38 after block 30 packs on it covers on dead bolt 20, and when latched position, the reset cylinder 23 on dead bolt 20 should be positioned at the triangular groove 35 of block 30.

At dead bolt 20 in latched position, namely the follower 50 of electric device is when extended position, the head 59 of follower is positioned at the top of the second chute 150, the circular cylinder 31 of limit stop 30 is along counterclockwise rotation in figure, because block 30 first facades 32 have withstood the first facade 21 of dead bolt, so dead bolt 20 is locked.

Under the blocked state of dead bolt 20, if there is the situation that illegal brute force is unblanked, that is to say, a very large external force is applied to the handle of safe door or draws retaining device, first this external force reach the second facade 22 of dead bolt 20, through the first facade 21 of dead bolt, reach the circular cylinder 31 of block 30 again, then reach the head 59 of follower, finally the second chute 150 by lock box 10 passes to lock body.It should be noted that, the transmission of above-mentioned external force is all to be undertaken by the mode of plane contact, and this external force is broken down into vertical with head the second facade 52 and vertical with head the 3rd facade 53 two component respectively after the solid head 59 of follower, has reduced thus stress and concentrated.In addition to be connected with driving between electric device 40 be flexible to follower 50, and only have follower head 59 to bear above-mentioned external force, screw mandrel 42 does not bear or bears external force seldom, thereby the damage of having avoided external force to directly act on electric device and having caused, so makes the ability that the illegal brute force of resistance of whole lock body is unblanked be strengthened.

Fig. 5 shows the structure of back-moving spring 70, Fig. 6 show this spring pack into lock box 10 and with the assembly relation of dead bolt 20.This back-moving spring is a biasing spring, its large ring spring 71 is set on axle 110, ringlet spring 72 is set on the post 111 in lock box, free end 73 is stuck in the groove 25 on dead bolt 20, and after assembling, this biasing spring keeps applying to dead bolt 20 power of tending to the counter clockwise direction rotation shown in Fig. 1 that makes it have.

Unlatching and the reseting procedure of this turning-bolt lock are as follows:

When the input unit of strongbox, as keyboard, magnetic card or fingerprint scanner etc. receive, control electric device 40 actions after correct unlock instruction follower 50 is moved, remove the locking to dead bolt 20.In the present embodiment, receive after open command to the logical forward current of motor 41, make its forward and drive follower 50 to move along indentation direction, cause and make the second chute 150 vacate the space 151 that can make cylinder 31 parts enter.If now rotate safe door handle or draw retaining device by external force, under this External Force Acting, dead bolt 20 overcomes the resistance of biasing spring 70, to the clockwise direction shown in Fig. 2, rotate, now lock the first facade 32 that the first facade 21 of 20 forces in cylinder 31, pushing away cylinder 31 and turning over an angle and make a part for cylinder 31 enter the second chute space 151 of having vacated along the clockwise direction shown in Fig. 2, and then the rotatable 90 degree left and right of dead bolt 20 are to enable possition; When said process starts, the projection 23 on dead bolt is arranged in the groove 35 on block, goes to enable possition while cylinder 31 turn over an angle at dead bolt 20, and the projection 23 on dead bolt 20 departs from grooves 35.And at dead bolt 20, arrive enable possitions, the projection 23 when the sector open limit of groove 35 is just in time aimed at dead bolt 20 and resetted on it must through movement locus on.

After imposing on handle or drawing the external force of retaining device to cancel, during the elastic force of biasing spring 70, dead bolt 20 is resetted to latched position from enable possition, dead bolt rotates to the counter clockwise direction shown in Fig. 2, now the sector open limit of the groove 35 of the projection 23 on dead bolt 20 from block 30 enters groove 35, and force in another facade 36 of groove 35, thereby drive block 30 to go back to the angle turning over while opening and vacate the space 151 of the second chute 150 that while opening, its cylinder 31 occupies.After dead bolt 20 and block 30 reset, control circuit makes its reversion and drives follower 50 to move along stretching out direction to the logical reversing the current of motor 41, until the solid head of follower enters the space 151 of the second chute 150 completely, block 30 is defined again, and dead bolt is also again locked.

Fig. 7 illustrates a kind of for turning-bolt lock or other strongbox electric device used, wherein motor 41 is commercially available direct current generators, this motor can be fixed in the cavity 17 arranging on lock box 10, motor drive shaft packs the hole 45 on screw mandrel 42 into, because transmitted moment is very little, can adopt easy interference fit.Casket body 60 is except outline and the second chute 150 are slidably matched, and the wall of its inside casing both sides also will be slidably matched with sleeve pipe 56 lateral surfaces, when sleeve pipe 56 traveling priority, by forcing in cover two springs 67,68 thereon, promotes casket body 60 moving linearlies.So structure is set, and one of them effect is exactly when there is impact external force, and lock body vibrations are violent, likely make sleeve pipe 56 deviate from from casket body 60, thereby cause fault.Adopt above-mentioned two springs 67,68 can play the effect of damping vibration, make the maintenance certain pressure between sleeve pipe 56 and casket body 60 simultaneously, prevent from being shaken backward dislocation.

Another effect that these two springs are set is that buckle 61 is transitioned into the position of the screw thread snap fastener of screw mandrel 42 and is play the guiding role from extreme position (namely stretching out put in place and indentation puts in place).As shown in Fig. 8 and Figure 10, on screw mandrel 42, be provided with two gathering sills 47 and 48, when the two legs 63,64 of buckle 61 when being arranged in gathering sill 47 and 48 just in time follower 50 in above-mentioned extreme position, till no matter forwarding unlatching to from dead bolt 20 from latched position, or dead bolt 20 resets to latched position from enable possition, the two legs 63,64 of buckle 61 all will the gathering sill 47 or 48 from screw mandrel 42 be transitioned into the position with wire rod thread snap fastener, and one of necessary condition that is transitioned into this position is exactly need to be to 63,64 1 end thrusts of two legs of buckle 61.And being set, these two springs 67,68 just met this condition.From Fig. 7, Fig. 9 and Figure 12, can find out, these two springs 67,68 are enclosed within respectively on two cylindrical shoulders 57,58 of sleeve pipe 56 and by two end faces of cuboid of its middle part projection and locate, and the other end of spring 67,68 is limited by two end faces 62 and 69 of casket body 60 cavitys respectively, so no matter in what position, these two springs 67,68 all to sleeve pipe 56 in other words the two legs 63,64 of buckle 61 keeping certain end thrust.Say from another point of view, coordinate the two legs 63,64 changing into by a buckle 61 of above-mentioned use to form and coordinate with the screw thread of screw mandrel 42 traditional screw mandrel screw thread, an outstanding technique effect is exactly can avoid causing motor 41 to be blocked then damage because of killing of wire rod thread and screw thread.Above-mentioned stall has two kinds of possibilities, one, and position on the buckle is forbidden or angular deviation generation screw thread is killed; Its two, there is other mechanical breakdown, the cylinder 31 of block 30 fails to reset, and causes follower 50 when direction moves, to run into obstacle to stretching out.Because in technical scheme of the present invention, the two legs 63 of buckle 61, 64 with corresponding hole 43, between 44 and and screw mandrel 30 screw threads between there is certain gap, leg 63, 64 also have certain elasticity, they are flexible with coordinating of screw mandrel 42 screw threads, even if there are above-mentioned two kinds of situations, the two legs 63 of buckle 61, 64 only can produce skidding with screw mandrel 42 screw threads, be that screw mandrel 42 is in normal rotation, but there is not traveling priority in buckle 61 and sleeve pipe 56, thereby can there is not stall phenomenon yet, thereby avoided motor 41 that impaired phenomenon occurs because of stall.

Arrange these two springs also have an effect be when dead bolt 20 in latched position, by block 30, follower 50 is stopped under external force, and when now control circuit rotates it to the logical forward current of motor 41, sleeve pipe 56 Compress Springs 68, thereby guarantee not occur stall phenomenon, after external force removes, under the effect of spring 68, follower 50 will slide into enable possition, still guarantee the unlatching of lock; When dead bolt 20 is in enable possition, there is external force to stop and can not dead bolt 20 be returned to latched position by back-moving spring 70, block 30 has occupied the space of follower 50 heads, and when now control circuit rotates it to the logical reversing the current of motor 41, leading screw 42 is by Compress Spring 67, thereby stall phenomenon does not occur in assurance, after external force removes, under the effect of spring 67, follower 50 will slide into locked position, guarantee closing of lock.

Figure 13 and Figure 14 illustrate the structure of lock box 10 of the present invention and lid 80, wherein, two cylinders 18,19 are for fixing a microswitch, whether this switch is used for detecting dead bolt 20 in opening or lock-out state, when dead bolt 20 arrives enable possition or is reset to from enable possition the process of latched position from latched position, dead bolt 20 can touch this switch, thereby produces a signal of telecommunication.In lock box, be also provided with for three cylinders 12,13,14 of control circuit board are installed, and the breach 15,16 of connector mounting.

Interior screw 11 and the through hole 801 of being provided with respectively of lock box 10 and lid 80, can fix the two with the screw matching.

In addition, lock box 10 interior settings turns into or breach 120 its opening sizes of producing are less than the radius size of dead bolt 20 for dead bolt 20.That is to say, dead bolt 20 can not take out by along continuous straight runs from breach 120.

From the globality of structure, consider, also on locking closure 80, be provided with the following structure matching with lock box 10:

For after installing with lock box 10, strengthen two of bulk strength respectively with 10 2 breach 120 of lock box and 15 tongues that match 802 and 803, assemble rear two breach and play seam positioning action;

For the circular cylindrical cavity 86 of cylinder 38 location to block 30, as axis hole, cavity 86 has slip cooperating relationship with cylinder 38;

For the circular cylindrical cavity 85 that the axle 110 being located in lock box 10 is positioned, as axis hole, cavity 85 has slip cooperating relationship with axle 110, corresponding with the guide rail 130 in being located at lock box 10, is provided with guide rail 83, to guarantee that dead bolt 20 reliably rotates flexibly;

At installation electric device (d.c. motor) correspondence position, be provided with two ribs 81 and 82, for fixing motor; Also at the second chute 150 correspondence positions, be provided with rib 84, for limiting follower 50.

On lock box 20, be also provided with for the installing hole 75 and 76 of pick-proof relocking dress is installed, and on lock box 10 and lid 80, be all provided with for lock body being arranged on to the installing hole 77,78,79 and 87,88,89 on safe door.It should be noted that, in order to provide, meet different installation requirements, above-mentioned installing hole is all provided with identical counterbore.So, no matter be chamber door to be pasted in the lock box back side lock body is installed, or chamber door pasted in the lid back side lock body is installed, above-mentioned setting can meet.

Although relate to a kind of turning-bolt lock and carried out special description disclosed with reference to the present embodiment, but those skilled in the art can understand, in the situation that not departing from scope and spirit of the present invention, can carry out to it all apparent modification of form and details.Therefore, embodiment described above is illustrative and not restrictive, and without departing from the spirit and scope of the present invention, all variations and modification are all within the scope of the present invention.

Claims (4)

1. the electric device for turning-bolt lock, described turning-bolt lock comprises: a lock box (10) with at least one breach (120), the lid (80) matching with this lock box, one can be produced to latched position and turn the dead bolt (20) that proceeds to enable possition from breach (120), the controllable locking device of dead bolt (20) from latched position to enable possition indentation that stops, an and flexible member (70) that can make dead bolt (20) be reset to latched position from enable possition

Described locking device comprises a block (30) and an electric device (40), described block has a cylinder (31), this cylinder packs in the first chute (130) that is located at correspondence position in described lock box and with it and forms and be slidably matched, at dead bolt (20) during in latched position, first facade (32) of cylinder (31) is relative with the first facade (21) plane of dead bolt (20)

Described electric device comprises: motor (41), with the coaxial screw mandrel being connected of this motor (42) and with this screw mandrel, be connected and the follower (50) of traveling priority with revolution, described follower has a solid polyhedron head (59), this head can be put into second chute (150) of the lock box (10) that is located at described turning-bolt lock and be slidably matched with it, first facade (51) of described head is relative with the second facade (33) plane of described cylinder (31) when described follower (50) extended position, and second facade (52) of head is relative with corresponding facade plane in described the second chute (150) respectively with the 3rd facade (53).

2. electric device as claimed in claim 1, it is characterized in that, described follower (50) also comprises a casket body (60), described head (59) is arranged on described casket body (60), a sleeve pipe (56) is installed in the cavity of described casket body (60), this sleeve pipe (56) and described screw mandrel (42) match and with the rotation of this screw mandrel traveling priority, described sleeve pipe (56) drives described casket body (60) mobile when mobile.

3. electric device as claimed in claim 2, it is characterized in that, the endoporus (55) of described sleeve pipe (56) is a unthreaded hole being slidably matched with screw mandrel (42) external diameter, on sleeve pipe (56), be provided with two with the axial vertical aperture (43 of casing tube internal hole (55), 44), the diameter of two apertures just in time passes respectively the two legs (63 of a buckle (61), 64), this buckle penetrates two described apertures (43, 44) after, its two legs (63, 64) be stuck in the screw thread of screw mandrel (42) of correspondence position, when screw mandrel (42) rotates, this buckle (61) and sleeve pipe (56) are made traveling priority thereupon, and then drive described casket body (60) mobile.

4. electric device as claimed in claim 2, it is characterized in that, on two cylinders (57,58) that stretch out at described sleeve pipe (56) two ends, be respectively installed with spring (67,68), the other end of spring (67) is limited by casket body (60) cavity top plane (62), and the other end of spring (68) is limited by casket body (60) cavity (66) end plane (69).

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