CN2343262Y - Safety door lock can lock invertedly without key - Google Patents

Abstract

The utility model provides a safety door lock capable of being locked reversely without a key. The utility model is characterized in that a lock body is provided with a reverse locking spring; a lock A and a lock B are provided with corresponding reverse locking mechanisms; the reverse locking mechanism is composed of a reverse locking knob positioned on the lock A and the lock B and a reverse locking push rod arranged in the lock body. A slide plate moves through driving the reverse locking push rod by rotating the reverse locking knob on the lock. When a locking position groove on a slide plate slot is positioned separating from a locking position rod, a lock tongue plate moves to the direction of a lock buckling box together with the slide plate and the lock tongue under the action of the reverse locking spring; after arriving at the proper position, the lock tongue plate is positioned axially, the lock tongue is inserted into the lock buckling box to play the function of reversely locking the door lock without the key. The utility model has the advantages of trouble saving, convenience and high safety.

Description

A kind of safety door latch without key back locking

The utility model relates to a kind of lock, the especially a kind of safety door latch that just can lock without key.

The door lock of selling on the market, general structure is: tapered end that is fixed on the lock body and the tapered end that is inserted in the door-plate are arranged, and also having the termination in the lock body except settling a bevelled oblique tongue in termination is the dead bolt on plane.Under the door-lock opening state, have only oblique tongue to stretch out outside the lock body, oblique tongue indentation in the lock body under the thrust of keeper when door is shut, the tongue that retreads of putting in place stretches out and inserts in the keeper, in a sense, tiltedly tongue has played " locking a door " effect, but owing to oblique tongue is not positioned in the axial direction, at indoor handle oblique tongue being pulled out keeper can open the door, and inserts from crack between a door and its frame at the thin matter thing of outdoor use and also can open the door oblique tongue release keeper.Therefore, must use dead bolt in order to ensure safety locks a door, promptly get and key is inserted the keyhole rotational lock core dead bolt is pushed in keeper, the back dead bolt that puts in place is axially located, there is not key unlocking, no matter be, claim locking a door of dead bolt to locking at this indoor or all can not withdraw from keeper to dead bolt and promptly can not open the door outdoor.And owing to lock to such an extent that carry out " drawing out " key " look for to " key, " alignings " keyhole, " rotations " key etc. and bother and move, a lot of people are disinclined to lock, go out door drawn and shut promptly to walk to get over, so just have potential safety hazard: the bad person enters the room from window, with handle an oblique tongue is pulled out keeper and opens door and steal thing; The bad person inserts from crack between a door and its frame with thin matter thing oblique tongue is released keeper and the burglary of opening the door.

The purpose of this utility model provides a kind of not locking need use key, good, easy to use, the safety door latch without key back locking of saving trouble of security personnel's performance.

The utility model achieves the above object by the following technical solutions: be provided with in lock body and lock spring, be provided with on tapered end A, B and lock mechanism, lock mechanism and be made up of the push rod of locking of locking knob and lock body that is positioned on tapered end A, the B respectively.

The utility model has the advantages that and lock, pull the door shut to rotate and lock knob and can lock, save trouble, make things convenient for, safety, improved security personnel's performance of door lock greatly without key.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is the structural representation of the utility model embodiment.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the B-B part sectioned view of Fig. 1.

Fig. 4 is the partial sectional view of the utility model embodiment tapered end B.

Shown in the figure, 1. handle 2. oblique tongue locator 3. oblique tongue springs 4. are locked spring 5. and are locked push rod 6. back-moving springs 7. and lock knob 8. tapered end A9. springs 10. tapered end A dialing parts 11. slide plates 12. bolt plate 13. lock bodies 14. keepers 15. dead bolts 16. shifting parts 17. cover plates 18. tapered end B dialing parts 19. lock-bit bars 20. cover screws 21. tapered end B dialing part knobs 22. and lock push rod knob 23. back-moving springs 24. and lock push rod 25. theft-resistant link chains 26. oblique tongue 27. lock-bit grooves 28. driver blades 29. and lock driver blade 30. tapered end B 31. and lock knob.

The utility model is the same with prior art to be included: lock body, keeper, tapered end A on the lock body, be inserted in the tapered end B in the door-plate, being placed in bevelled oblique tongue of lock body inner termination and termination is the dead bolt on plane, the bottom of fixedlying connected with dead bolt is provided with the bolt plate of teeth groove, one end is fixed on that it passes the lock-bit bar of the slotted hole on bolt plate and the slide plate on the lock body, lock-bit groove with its slotted hole is pressed in the slide plate of on the lock-bit bar bolt plate being realized axial location, the handle that is connected with oblique tongue, spring.Innovation of the present utility model is to be provided with to lock spring (4) in lock body (13), is provided with on tapered end A (8), B (30) and locks mechanism accordingly.Tapered end A, B lock mechanism respectively by be positioned on tapered end A, the B lock knob (7), (31) and lock body lock push rod (5), (24) are formed.

Lock spring (4) and can adopt torsionspring, it is enclosed within, and the two ends pin is inserted in respectively in bolt plate and the lock body away from the locating hole on the end face of keeper on the dowel on the lock body; Lock spring and also can adopt the compression spring, it is enclosed within lock body away from the guide peg on the keeper inner face, and both ends of the surface contact respectively on lock body and the bolt plate; Lock spring and can also adopt extension spring, its two ends pin is positioned at respectively on the end face of nearly keeper in bolt plate and the lock body.

The mechanism of locking on tapered end A, the B can be like this: lock knob (7), (31) by the through hole on tapered end A, the B or be enclosed within tapered end A, B last with lock push rod (5), (24) are connected.

The mechanism of locking on the tapered end B can also be like this: by lock driver blade (29), by the through hole on the tapered end B with lock that driver blade is connected lock knob (31), be positioned on the cover plate (17) lock push rod knob (22) and the push rod (24) of locking on it is formed.Lock the push rod knob and be provided with the hole of locking the driver blade insertion.

For the more compact structure that makes door lock, reasonable, more reliable performance, can do corresponding change, improve the structure of parts such as bolt plate, slide plate.Slide plate can be like this: slide plate covers on the bolt plate, and the locating piece on the bolt plate has limited slide plate and all moved axially on bolt plate.Bottom surface, slide plate both sides can be locked the flange that push rod touches when locking.

Dead bolt of the present utility model and bolt plate can be assemblys, also can be an integral body, and the structure of dead bolt and shape can be square, also can be circular, can also be with and collude, and its quantity can be that one or two is so that a plurality of.Tapered end A, B lock knob, can make the structure with the effect of door knob handle for more practical, for attractive in appearance, can make and having the shape that skill is stated aesthetic feeling.

Referring to Fig. 1, Fig. 2 and Fig. 3, in this embodiment, slide plate (11) is sliding to cover on the bolt plate (12), locating piece on the bolt plate (12) has limited slide plate (11) moving axially on bolt plate (12), and the bottom surface, both sides of slide plate (11) is provided with when locking for locking push rod (5) and locking the flange that push rod (24) touches.Spring (9) is enclosed within on the dowel on the slide plate, and the two ends pin is inserted on the locating piece on the bolt plate (11).Back-moving spring (6), (23) are enclosed within respectively locks knob (7) and locks on the push rod knob (23), and its effect is to lock to make respectively after the end to lock push rod (5) and lock push rod (24) self-return.Lock spring (4) and adopt torsionspring.Lock-bit bar (19) is positioned at cover plate (17) on the lock body (13) with lid utmost point screw (20).Theft-resistant link chain (26) one ends are fixed on the keeper (14), and the other end can be actively set on the dowel on the lock body (13).Tiltedly tongue locator (2) is positioned on the lock body, uses it that oblique tongue (26) is fixedly stretched out or contracts in lock body (13) lining.

Operating principle of the present utility model is like this: in the process of unblanking, lock spring generation elastic deformation, the mobile reserve energy of bolt plate when locking; Door is shut, the back rotation that puts in place is locked the knob drive and is locked the push rod rotation, locking push rod touches slide plate slide plate is moved, bolt plate is being locked under the spring action and is being moved toward the keeper direction together with slide plate and dead bolt when the distance that moves makes the location of the lock-bit groove disengaging lock-bit bar on the slide plate slotted hole, after moving into place, lock push rod and no longer touch slide plate, slide plate is return under spring action, lock-bit groove on its slotted hole is pressed in and has limited moving axially of bolt plate on the lock-bit bar, and dead bolt inserts in the keeper and plays the effect that just can lock (locking a door) without key.Rotate after locking again and lock knob, lock member and can not touch the parts that slide plate and bolt plate etc. have influence on the door lock security personnel, promptly security personnel's performance of door lock is not affected.

Claims (5)

1. safety door latch without key back locking, comprising tapered end A on lock body, the lock body, being inserted in tapered end B in the door-plate, being placed in the bevelled oblique tongue of lock body inner termination is the dead bolt on plane, the bolt plate of fixedlying connected with dead bolt, slide plate, handle and spring with the termination, it is characterized in that:

A. in lock body (13), be provided with and lock spring (4);

B. on tapered end A (8), B (30), be provided with and lock mechanism accordingly: tapered end A, B lock mechanism respectively by be positioned on tapered end A, the B lock knob (7), (31) and lock body lock push rod (5), (24) are formed.

2. safety door latch according to claim 1 is characterized in that: lock knob (7), (31) respectively by the through hole on tapered end A, the B or be enclosed within tapered end A, B last with lock push rod (5), (24) are connected.

3. safety door latch according to claim 1 is characterized in that: tapered end B lock mechanism by lock driver blade (29), by the through hole on the tapered end B with lock that driver blade is connected lock knob (31), be positioned on the cover plate (17) lock push rod knob (22) and the push rod (24) of locking on it is formed.

4. safety door latch according to claim 1 is characterized in that: slide plate (11) is sliding to cover on the bolt plate (12) of locating piece.

5. safety door latch according to claim 1 is characterized in that: the bottom surface, both sides of slide plate (11) is provided with flange.

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