Safe square shaft
Technical field
The present invention relates to lock technology fields, and in particular to a kind of safe square shaft.
Background technology
During the use of lockset, main lock tongue outer driving shaft is connect with the main upper lockwork of lock tongue unlocking is driven, outer grip
Hand is connect with main lock tongue outer driving shaft by square shaft and main lock tongue outer driving shaft is driven to rotate, and is reached counter and is put on lock or push unlocking
Or the purpose freely to dally.Conventional square shaft is prismatic solid type square shaft, sizable torsion can be transmitted, so in lockset
Normal use during, the case where seldom will appear square shaft damage, but this is also provided to criminal using improper
The chance that means are unlocked, they directly can strongly rotate outer handle, destroy the interior guarantor within the organization for driving main lock tongue to unlock locking
Protection unit, and then lock body is destroyed, achieve the purpose that illegal unlocking.
Chinese patent literature CN2326683Y discloses a kind of handle with force limiting device, in the linkage part of handle control
It is equipped with handle key circle Peripheric locking, is the elastic key component that can be retracted more than certain rotary force, make handle and linkage
Power transmission between device is restricted, so as to protect internal part not to be destroyed by excessive external force.
But in reality, setting elastic key component there are problems that on the linkage part of handle control, a side
Face makes handle arrangement become more complicated, and in handle part for the sake of beautiful, light and handy, it is also difficult to more portions be arranged
Part;On the other hand in the long-term use, repeated deformation easy tos produce fatigue of materials to elastomeric element therein, so that connection
The circle Peripheric locking failure of dynamic component and handle key, cause the problem of cannot normally opening.
Chinese patent literature CN101985865A discloses a kind of handle of concealed door window lock, including pedestal, handle
And square axis, handle are contained in the cavity of pedestal, and in the handle, rear end is arranged in lockset for the front end setting of square axis, and four
Square shaft offers card slot at the position of front end, and card slot for being socketed accommodating fixinig plate, fixinig plate there is fixed square axis to exist
In the axis hole of pedestal, the phenomenon that preventing square axis to be drawn out.
Although technical solution disclosed in above-mentioned document has opened up card slot in solid square axis, the effect of card slot is
For being clamped accommodating fixinig plate, to coordinate fixinig plate to realize the positioning to square axis.Its position is also in from the point of view of in figure
It is exposed at except door lock plaque, even if such position is accidentally broken in the groove location, it is illegal point also to have part square shaft to expose
Son provides the chance for further destroying door lock, it is clear that how card slot here prevents criminal from being revolved by strength if not providing
Turn outer handle and destroys the enlightenment that main lock tongue outer driving shaft realizes illegal unlocking.
Invention content
Therefore, the technical problem to be solved in the present invention is that the square shaft in the outer handle of the prior art is overcome to be easy to pass through strength
The outer handle of rotation realizes the defect of illegal unlocking to destroy lock body, to provide one kind can not by the outer handle of strength rotation come
It destroys lock body and realizes the safe square shaft of illegal unlocking.
A kind of safe square shaft of the present invention, including
Square shaft ontology, first end connect main lock tongue outer driving shaft, and second end connects outer handle, described in the outer grip hand-motion
Square shaft ontology rotates, and then drives the main lock tongue outer driving shaft rotation;
Breaking groove is opened in the square shaft ontology between the main lock tongue outer driving shaft and the outer handle, and phase
At the not exposed position of door body or door lock outer plaque.
The breaking groove is located at the position of the first end end face 15mm away from the square shaft ontology.
The square shaft ontology is cylindrical at the breaking groove.
The end face of the first end of the square shaft ontology offers relief hole, and one end of the main lock tongue outer driving shaft is opened
Equipped with the square hole for being inserted into installation for the square shaft ontology, the resigning convex block that can be inserted into the relief hole is equipped in the square hole.
The depth of the relief hole is less than distance of the breaking groove away from the first end end face.
The resigning convex block is taper drilling-preventing structure.
The relief hole includes column made of being extended successively towards the direction of the second end by the end face of the first end
Shape hole and bellmouth.
The basal diameter of the cylindrical hole and the bellmouth is equal, and straight equal to the bottom surface of the taper drilling-preventing structure
Diameter, the taper drilling-preventing structure are fully inserted into the relief hole.
Technical solution of the present invention has the following advantages that:
1. safe square shaft provided by the invention, including square shaft ontology and breaking groove, the first end connection of the square shaft ontology
Main lock tongue outer driving shaft, second end connect outer handle, and square shaft ontology rotates described in the outer grip hand-motion, and then drives the master
Lock tongue outer driving shaft rotates;The breaking groove is opened in the square shaft ontology between the main lock tongue outer driving shaft and the outer grip
Between hand, and at the position not exposed relative to door body or door lock outer plaque.Due to the presence of above-mentioned breaking groove, and above-mentioned fracture
Slot is opened in square shaft ontology between main lock tongue outer driving shaft and outer handle, not exposed relative to door body or door lock outer plaque
At position, so causing the setting torsion to the torsion of safe square shaft more than safe square shaft when criminal's strength rotates outer handle
When, fracture can be deformed because of stress concentration by being broken at groove location, and lock can not be transmitted to again by causing to be applied to the power of outer grip on hand
Body, lock body can not be opened, the effective guarantee safe antitheft in house.Wherein, the intensity at the breaking groove of safe square shaft can be with
By experiment determine come, be easily formed in batches, it is convenient for production.In addition, the safe square shaft of the present invention is not by the specific of lock body
Structure limits, and is suitable for a variety of lock bodies, and application range is very extensive.
2. safe square shaft provided by the invention, the square shaft ontology is cylindrical at the breaking groove.It is convenient for so disconnected
Split groove processing molding.
3. the end face of safe square shaft provided by the invention, the first end of the square shaft ontology offers relief hole, institute
The one end for stating main lock tongue outer driving shaft offers the square hole that installation is inserted into for the square shaft ontology, is equipped with and can be inserted into the square hole
The resigning convex block of the relief hole.Since the cooperation of the resigning convex block of the relief hole and main lock tongue outer driving shaft of square shaft ontology is deposited
So that in normal use, resigning convex block is inserted into relief hole lockset, is had between safe square shaft and main lock tongue outer driving shaft
Enough effective cooperation positions can transmit the normal torsion unlocked and needed;And when criminal's strength is unlocked at breaking groove
After twisting off safe square shaft, if it is desired to by further dismantling outer plaque, replaces the conventional square shaft provided for oneself and unlock to destroy lock body,
Then conventional square shaft can not coordinate with the resigning convex block of main lock tongue outer driving shaft due to end face, lead to conventional square shaft and drive outside main lock tongue
It is unable to fully coordinate between moving axis, and then the torsion needed that can not will unlock is transmitted in lock body, is still unable to reach damage lock
The purpose of the illegal unlocking of body, has further ensured the safe antitheft in house.
4. safe square shaft provided by the invention, the resigning convex block is taper drilling-preventing structure, can prevent illegal point in this way
Son removes resigning convex block by self-contained drilling tool.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is the partial sectional view after the safe square shaft of the present invention is mounted on a door;
Fig. 2 is the sectional view of the safe square shaft of the present invention;
Fig. 3 is the sectional view that the safe square shaft of the present invention is connect with main lock tongue outer driving shaft;
Fig. 4 is the sectional view that conventional square shaft is connect with the main lock tongue outer driving shaft of the present invention.
Reference sign:
1- square shaft ontologies;11- first ends;12- second ends;13- relief holes;131- cylindrical holes;132- bellmouths;2- is broken
Slot;The main lock tongue outer driving shafts of 3-;31- square holes;32- resigning convex blocks;The outer handles of 4-;5- outer plaques;6- lock bodies.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing.
As depicted in figs. 1 and 2, a kind of safe square shaft of the invention, including
Square shaft ontology 1, first end 11 connect main lock tongue outer driving shaft 3, and second end 12 connects outer handle 4, the outer handle 4
It drives the square shaft ontology 1 to rotate, and then the main lock tongue outer driving shaft 3 is driven to rotate;
Breaking groove 2 is opened in the square shaft ontology 1 between the main lock tongue outer driving shaft 3 and the outer handle 4,
And at the position not exposed relative to door body or door lock outer plaque 5.
Wherein, the main lock tongue outer driving shaft 3 is connect with the main upper lockwork of lock tongue unlocking of the driving in lock body 6.
Due to the presence of above-mentioned breaking groove 2, and above-mentioned breaking groove 2 is opened in square shaft ontology 1 between main lock tongue outer driving shaft 3
Between outer handle 4, at the position not exposed relative to door body or door lock outer plaque 5, so when criminal's strength rotate it is outer
Handle 4 and when causing to be more than the setting torsion of safe square shaft to the torsion of safe square shaft, can be because of stress concentration at 2 position of breaking groove
And fracture is deformed, cause the power being applied on outer handle 4 that can not be transmitted to lock body 6 again, lock body 6 can not be opened, effective guarantee
The safe antitheft in house.Wherein, the intensity at the breaking groove 2 of safe square shaft can be determined by experiment to be also easy shape
In batch, convenient for production.In addition, the safe square shaft of the present invention is not limited by the concrete structure of lock body 6, it is suitable for a variety of lock bodies,
Application range is very extensive.
The specific location of the breaking groove 2 is unrestricted, if meet the breaking groove 2 be opened in square shaft ontology 1 between
Between main lock tongue outer driving shaft 3 and outer handle 4.In practical applications, the preferably described breaking groove 2 is located at the square shaft ontology
1 at the position of the first end 11.In the present embodiment, the breaking groove 2 is located at described the away from the square shaft ontology 1
At the position of 11 end face 15mm of one end or so.
Shape of the square shaft ontology 11 at the breaking groove 2 can be a variety of, such as can be quadrangular, hexagonal prisms
Deng the preferably described square shaft ontology 11 of the present embodiment is cylindrical at the breaking groove 2.It is convenient for 2 machine-shaping of breaking groove in this way.
As shown in Figures 2 and 3, the end face of the first end 11 of the square shaft ontology 1 offers relief hole 13, the master
One end of lock tongue outer driving shaft 3 offers the square hole 31 that installation is inserted into for the square shaft ontology 1, and being equipped in the square hole 31 can insert
Enter the resigning convex block 32 of the relief hole 13.Due to the resigning convex block of the relief hole 13 and main lock tongue outer driving shaft 3 of square shaft ontology 1
32 cooperation exists so that in normal use, resigning convex block 32 is inserted into relief hole 13 lockset, safe square shaft 1 and main lock tongue
There is enough effective cooperation positions between outer driving shaft 3, the normal torsion unlocked and needed can be transmitted;And when criminal is strong
After power unlocking twists off safe square shaft 1 at breaking groove 2, if it is desired to by further dismantling outer plaque 5, replace the routine provided for oneself
Square shaft is unlocked to destroy lock body 6, then conventional square shaft can not be coordinated with the resigning convex block 32 of main lock tongue outer driving shaft 3 due to end face,
Cause effective cooperation area between conventional square shaft and main lock tongue outer driving shaft 3 too small, be unable to fully cooperation (as shown in Figure 4),
And then the torsion needed that can not will unlock is transmitted in lock body 6, is still unable to reach the purpose for destroying 6 illegal unlocking of lock body, into
One step has ensured the safe antitheft in house.
Specifically, the depth of the relief hole 13 is less than distance of the breaking groove 2 away from 11 end face of the first end.
The specific constructive form of the resigning convex block 32 can be it is a variety of, such as can be from the bottom wall of the square hole 31 to
Cylinder extending out, cuboid etc..In the present embodiment, the preferably described resigning convex block 32 is taper drilling-preventing structure, is stepped down
Tapered drilling-preventing structure is arranged in convex block 32, can prevent criminal from removing resigning convex block 32 by self-contained drilling tool.Institute
It can be cone (as shown in Figure 3) to state taper drilling-preventing structure, or the assembly of round estrade and cylinder is (such as Fig. 4 institutes
Show), can also be pyramid, or the assembly of prismoid and pyramid.In the present embodiment, the preferably described taper is anti-
Brill structure is cone.
The specific constructive form of the relief hole 13 can be a variety of, and the present embodiment preferably relief hole 13 includes by institute
State first end 11 end face extend successively towards the direction of the second end 12 made of cylindrical hole 131 and bellmouth 132.
The cylindrical hole 131 is equal with the basal diameter of the bellmouth 132, and equal to the bottom of the taper drilling-preventing structure
Face diameter, the taper drilling-preventing structure are fully inserted into the relief hole 13.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.