CN2258904Y - Theft-proof door lock - Google Patents

Abstract

The utility model relates to a theft-proof door lock, which is composed of a lock catch box (1), a casing (2), a bolt assembly (3), an oblique bolt assembly (4), a lock assembly (5), a cover plate assembly (6) and a safety mechanism, wherein, the bolt assembly (3) comprises a circular bolt (7), a bolt plate (8), a seat for the bolt plate (10) and a curved rod shaft (9). The utility model is characterized in that one end of the bolt plate (8) can be inserted into a groove of one head of the circular bolt (7); one end of the bolt plate (8) and the groove of one head of the circular bolt (7) can be fixed into the integration through a rivet (11) a supporting pin (14) is arranged on one end of the bolt plate (8). Because the bolt plate of the utility model is different to bend and deform, and the connecting rivet is different to fall off, the anti-impact ability and pressure sustained ability of the lock can be enhanced; larger external force is acted on the door; the lock is different to open; the theft-proof performance of the lock can be enhanced.

Description

Safe-guard door lock

The utility model relates to the field of lock, is the safe-guard door lock that belongs to a kind of protecting against shock specifically.

At present, the door lock on the market is in order to increase theftproof performance, generally all is to adopt double lock tongue to add modes such as indoor locking and safeties, uses these methods, and lockset has certain anti-theft capability, even the thief has omnipotent key, enters within doors also can't opening the door outdoors.But also there is the problem of protecting against shock ability in these locks.Because between the main dead bolt-cylinder tongue of these locks and the hyoplastron be the mode that adopts end face contact, the connection between them is that the employing connected nail passes end face and fixes.This connected mode, under the external force effect that pushes, thrust is on connected nail, and when external force arrival one timing, connected nail just comes off easily, hyoplastron meeting flexural deformation, door will be opened as a result, does not have antitheft effect.

The purpose of this utility model is to be connected reliable more firmly between cylinder tongue and the hyoplastron of a kind of lock of design, is not easy the door lock that hyoplastron flexural deformation or connected nail is come off because of the external force effect.

The utility model adopts following technical scheme: safe-guard door lock is made up of keeper [1], housing [2], dead bolt assembly [3], oblique tongue assembly [4], lock head component [5], cover plate assembly [6], several parts of link gear and insurance institution, dead bolt assembly [3] comprises cylinder tongue [7], hyoplastron [8], hyoplastron seat [10], several parts of crankshaft axis [9], an end that it is characterized in that hyoplastron [8] is to insert in cylindrical [7] one groove, use rivet [11] fixing together again, connect rivet like this and be not easy to come off because of the external force effect them.

The utility model is in such scheme, and also design has supporting nail [14] on hyoplastron [8], and hyoplastron is not easy because of external force effect flexural deformation.

Below in conjunction with accompanying drawing the utility model is done the embodiment explanation.

Fig. 1 is the internal construction schematic diagram of two tongue safe-guard door locks;

Fig. 2 is a L-L sectional view among Fig. 1;

Fig. 3 is the rear elevation of Fig. 1 when removing keeper 1;

Fig. 4 is the amplification assumption diagram of dead bolt assembly 4;

Fig. 5 is a dead bolt assembly A-A sectional view among Fig. 3.

As shown in Figure 1, two flapper locks include several major parts such as keeper 1, housing 2, dead bolt assembly 3, oblique tongue assembly 4, lock head component 5, cover plate assembly 6, insurance institution, the structure of dead bolt assembly 3 as shown in Figure 3, dead bolt assembly 3 includes cylinder tongue 7, hyoplastron 8, hyoplastron seat 10, crankshaft axis more than 9 parts, hyoplastron 8 links insert in the head insertion slot of cylinder tongue, fix them with 4 rivets 11 then, as shown in Figure 3.Do the time spent as external force, external force mainly acts on hyoplastron 8 and the cylinder tongue 7, has added 4 rivets and has fixed, even under therefore acting on outside very big, rivet can not come off.In addition in order to strengthen the protecting against shock ability, 1 supporting nail 12 also is housed on hyoplastron 8, side-prominent to housing 2, when hyoplastron 8 is subjected to certain moment loading, supporting nail 12 withstands housing 2, hyoplastron 8 just is not easy flexural deformation like this, and door also just is not easy to beat, and has strengthened the protecting against shock ability of door lock and the ability of bearing pressure greatly.

As shown in Figure 1, when unblanking or locking with key, external force promotes the STATEMENT OF FEDERALLY SPONSORED in the lock head component 3, drive the link gear in the dead bolt assembly 3 again, link gear has stroke plate 13 and hyoplastron torsion spring 14,3 circumferential notches are arranged on the stroke plate 13, and a reference column 15 is arranged in the door lock housing 2, when it drops in certain circumferential notch of stroke plate 13, stop the external force effect, reference column 3 is pressed the position to be blocked the location by circumferential notch simultaneously by hyoplastron torsion spring 14, thereby on a certain position that the garden of drive post tongue 7 is fixed in the keeper 1 door is closed; Or drive cylinder tongue 7 and withdraw from keeper 1, and stir oblique tongue assembly 4 by curved bar door is opened.

In shown in Figure 1, safeties include safeguard 16, and sheet 17 and insurance knob 18 are pulled out in 17 insurances of insurance torsion spring, as shown in Figure 3.When rotating the insurance knob, can promote safeguard 16, it is blocked or unclamp oblique tongue assembly 4, when blocking oblique tongue assembly, tiltedly the tongue assembly just can not be stirred, and plays antitheft effect.

The utility model is because hyoplastron is not easy flexural deformation, and connects rivet and be not easy to come off, and therefore strengthened the protecting against shock ability of lock greatly, though on door the very big external force of effect, this door lock also is not easy to open, so strengthened the theftproof performance of lock widely.

Claims (2)

1. two tongue safe-guard door lock, form by keeper [1], housing [2], dead bolt assembly [3], oblique tongue assembly [4], lock head component [5], cover plate assembly [6], link gear and insurance institution, dead bolt assembly [3] comprises garden post tongue [7], hyoplastron [8], hyoplastron seat [1 0], several parts of crankshaft axis [9], an end that it is characterized in that hyoplastron [8] is in the groove of [7] one on insertion garden post, uses rivet [11] fixing together them again.

2. safe-guard door lock according to claim 1 is characterized in that also designing on the hyoplastron [8] having to support and follows closely [14].

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