CN103899149B - Combination of anti-theft key and lock and its use method - Google Patents

Abstract

The present invention discloses a combination of an anti-theft key and a lock head and a method for using the combination, comprising a key (1) and a lock head, wherein one side of the key body (1.2) is provided with teeth distributed along the length direction; the lock core body (3) comprises a first lock core body (3.1), a second lock core body (3.3) and a third lock core body (3.5) which are arranged in sequence along the axial direction at intervals, a first connector (3.2) and an elastic connector for rotational reset are arranged between the first lock core body (3.1) and the second lock core body (3.3), and a second connector (3.4) and an elastic connector for rotational reset are arranged between the second lock core body (3.3) and the third lock core body (3.5). The lock core of the combination of the anti-theft key and the lock head is designed in a segmented manner, so that it is difficult for an opening tool to directly insert and touch the pin assembly, the technical unlocking difficulty is high, and the anti-theft performance is good.

Description

Combination of anti-theft key and lock head and method of use thereof

technical field

The invention relates to the field of locks, in particular to a combination of an anti-theft key and a lock head and a use method thereof.

Background technique

At present, there are a great variety of locksets on the market with different structures, among which the most widely used in people's lives is the tumbler lock. The lock head of the tumbler lock in the prior art mostly is made up of lock body, lock core, the plectrum linked by lock core and pin assembly, and the lock core is provided with keyhole. Its working principle is that when the key corresponding to the lock head is inserted, the tooth surface of the key corresponds to each marble, so that the height of each marble is at the contact surface between the lock body and the lock cylinder, and then the lock cylinder is rotated. The paddle can be driven to drive the dead bolt to unlock. The lock cylinder of common pin locks is mostly one-piece. Technical unlocking tools such as lock guns, steel sheets, screwdrivers, etc. are inserted directly into the keyhole and rotated. It is easy to move or even destroy the pins in the lock cylinder. The lock can be opened forcibly, and its anti-theft performance is poor.

Contents of the invention

The technical problem to be solved by the present invention is to provide a segmented design of the lock cylinder, which is difficult for the opening tool to directly touch the pin assembly, difficult to unlock technically, and a combination of an anti-theft key and a lock head with good anti-theft performance.

The technical solution adopted by the present invention to solve the above problems is: a combination of an anti-theft key and a lock head, including a key and a lock head, the key includes a flat key handle and a key body, and one part of the key body The side is provided with asymmetrically shaped tooth patterns distributed along the length direction; the lock head includes a housing, a lock cylinder that matches the tooth pattern on the key body, and a pin assembly, and the lock cylinder is axially A key hole is provided, and the lock core body includes a first segment lock core body, a second segment lock core body and a third segment lock core body arranged at intervals along the axial direction, the first segment lock core body and the third segment lock core body A first connecting body and an elastic connecting device for rotating and resetting are arranged between the second section of the lock core body, and a second connecting body and a second connecting body are arranged between the second section of the lock core body and the third section of the lock core body. Elastic connection device for rotation and reset;

Both elastic connecting devices include a tension spring, an upper positioning pin for connecting and fixing the upper end and a lower positioning pin for connecting and fixing the lower end. arc groove;

The angle between the axis of the key hole cross section of the first connecting body and the second section of the lock core body and the axis of the key hole cross section of the first section of the lock core body is 90° in the counterclockwise direction; The included angle along the clockwise direction between the axis of the key hole of the second connecting body and the third section of the lock core body and the axis of the key hole cross section of the first section of the lock core body is 90°.

Compared with the prior art, the present invention has the advantages that: the lock core body of the combination of the anti-theft key and the lock head is a segmented design, and two connecting bodies are respectively arranged between each section of the lock core body and are used for rotating and resetting. The elastic connection device, and the angle between the axis of the key hole cross section of the first connecting body and the second section of the lock core body and the axis of the key hole cross section of the first section of the lock core body is 90° in the counterclockwise direction (that is, the keyhole of the first connecting body and the second section lock core body is vertically arranged with the keyhole of the first section lock core body), the axis of the keyhole of the second connecting body and the third section lock core body is in line with the first section The angle between the axes of the cross section of the key hole of the lock core body in the clockwise direction is 90° (that is, the key hole of the second connecting body and the third section of the lock core body and the first connecting body and the second section of the lock core body The keyhole is set at 180°). During the unlocking process, the operator needs to rotate 90° clockwise or counterclockwise in sections before continuing to unlock. The key of the present invention is a common commercially available one-way key, and the lock head is also no different from the common lock on the surface, but the general technology unlocking tool can only stir the first section of the lock core body in the lock core body. The pin assembly is difficult to enter the first connecting body. Even if the technical unlocking tool enters the first connecting body, since the pin assembly of the second section of the lock cylinder and the pin assembly of the first section of the lock cylinder are arranged perpendicular to each other, it is difficult for the unlocking tool to enter the first connecting body. It is even more difficult to move the pin assembly in the second section of the lock cylinder to continue to enter the second connecting body. It is impossible to toggle the pin assembly in the third section of the lock cylinder, so that the technical unlocking tool cannot be used. anti-theft performance.

As a preference, an auxiliary positioning device is provided on the second section of the lock cylinder, and a vertically penetrating installation groove is provided on the second section of the lock cylinder, and the auxiliary positioning device includes a vertically installed The positioning spring in the groove and the steel balls arranged at both ends of the positioning spring, the lower end surface of the first connecting body and the upper surface of the second connecting body are respectively provided with grooves for accommodating the ends of the steel balls. Like this, in the process that lock cylinder body rotates and resets, can utilize the elasticity of spring and the cooperation of the groove that the lower end face of steel ball and the first connecting body and the upper surface of the second connecting body are provided with to the first connecting body, the second connecting body Two connectors etc. are used for auxiliary positioning.

A method for using a combination of an anti-theft key and a lock head, the specific steps are as follows:

1) Insert the key into the key hole of the lock cylinder body until the key body cannot move forward, at this time, the front end of the key body contacts the end surface of the first connecting body;

2) After turning the key counterclockwise by 90°, the key body continues to be inserted into the key hole of the first connecting body, and continues to be inserted downward into the key hole of the second lock core body until the key body cannot continue to move forward. At this time, the key The front end of the body is in contact with the end surface of the second connecting body;

3) After turning the key clockwise 180°, the key body continues to be inserted into the key hole of the second connecting body, and continues to be inserted downward into the key hole of the third lock core body, and then continue to turn the key to drive the lock core body clockwise Rotate 90°, the tail of the lock cylinder drives the paddle to drive the lock tongue to unlock.

Compared with the prior art, the present invention has the advantage that it is different from the in-line key unlocking of the prior art. During the unlocking process of the present invention, when the operator inserts the front part of the key until the key body cannot move forward, the operator needs to turn the key counterclockwise. Turn 90° and then continue to insert until the key body can no longer move forward, then turn the key 180° clockwise and then continue to insert, and then continue to turn the key to drive the lock cylinder body to rotate, the tail of the lock cylinder drives the paddle to drive the lock tongue Can be unlocked. It is difficult for technical unlocking tools to imitate this unlocking process. Technical unlocking is difficult and has good anti-theft performance.

Description of drawings

Fig. 1 is a schematic cross-sectional structural view of the combination of an anti-theft key and a lock cylinder of the present invention.

Fig. 2 is a front view partial cross-sectional structural schematic diagram of the combination of the anti-theft key and the lock cylinder of the present invention.

Fig. 3 is a schematic partial cross-sectional structural schematic diagram of the front view of the first connecting body of the combination of the anti-theft key and the lock cylinder of the present invention.

Fig. 4 is a schematic partial cross-sectional structural schematic diagram of the front view of the second connecting body of the combination of the anti-theft key and the lock cylinder of the present invention.

In Fig. 1-4: 1 key, 1.1 key handle, 1.2 key body, 2 housing, 3 lock cylinder body, 3.1 first section lock cylinder body, 3.2 first connecting body, 3.3 second section lock cylinder body, 3.4 the first section lock cylinder body Two connectors, 3.5 third section lock core bodies, 4 upper positioning pins, 5 extension springs, 6 lower positioning pins, 7 positioning springs, 8 steel balls. A The average line of the width direction of the keyhole of the first section of the lock cylinder, B The average line of the width direction of the keyhole of the first connecting body and the second section of the lock cylinder, C The second connecting body and the third section of the lock cylinder The bisector in the width direction of the keyhole of the body, b the width of the end edge of the keyhole.

detailed description

Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1-4, a combination of an anti-theft key and a lock head includes a key 1 and a lock head. The key 1 includes a key handle 1.1 and a flat key body 1.2. The key body 1.2 One side is provided with tooth patterns distributed along the length direction; the lock head includes a housing 2, a lock core body 3 and a pin assembly that matches the tooth pattern on the key body 1.2, and the lock core body 3 is along the shaft A key hole is provided, and the lock core body 3 includes a first segment lock core body 3.1, a second segment lock core body 3.3 and a third segment lock core body 3.5 arranged at intervals along the axial direction. Between the section lock core body 3.1 and the second section lock core body 3.3, a first connecting body 3.2 and an elastic connection device for rotating and resetting are arranged, and the second section lock core body 3.3 and the third section lock core body 3.5 A second connecting body 3.4 and an elastic connecting device for rotating and resetting are arranged between them.

Both elastic connecting devices include extension springs 5 for connecting adjacent two sections of lock cylinders, fixing one end of extension springs 5 to the upper positioning pin 4 of the previous section of lock cylinders and fixing the other end of extension springs to the next section. The lower positioning pin 6 of the lock core body, the first connecting body 3.2 and the second connecting body 3.4 are all provided with arc-shaped grooves for accommodating the extension spring 5 .

Specifically refer to, the extension spring 5 is connected between the first section lock core body 3.1 and the second section lock core body 3.3, and the upper end of the extension spring 5 is fixed to the first section lock core body 3.1 by the upper positioning pin 4, and the extension spring The lower end of 5 is fixed to the second section lock core body 3.3 by the lower positioning pin 6. An extension spring 5 is also connected between the second section lock core body 3.3 and the third section lock core body 3.5, and the upper end of the extension spring 5 is fixed to the second section lock core body 3.3 by the upper positioning pin 4, and the lower end of the extension spring 5 It is fixed to the third section of the lock core body 3.5 by the lower positioning pin 6.

The average line B in the width direction of the keyhole of the first connecting body 3.2 and the second section of the lock core body 3.3 is the average line A in the width direction of the keyhole of the first section of the lock core body 3.1 and rotated 90 in the counterclockwise direction °; the mean line C in the width direction of the key hole of the second connecting body 3.4 and the third segment lock core body 3.5 is the mean line A in the width direction of the key hole of the first segment lock core body 3.1 in the clockwise direction Turn 90°. Here, the width direction of the keyhole corresponds to the thickness direction of the corresponding key body, because the shape of the keyhole is an irregular shape, so the mean line in the width direction of the keyhole is defined here as the width b of the end edge of the keyhole the mean line.

A method for using a combination of an anti-theft key and a lock head, the specific steps are as follows:

1), insert the key 1 into the key hole of the lock cylinder body 3 until the key body 1.2 cannot move forward, at this time, the front end of the key body 1.2 contacts the end face of the first connecting body 3.2;

2) After turning the key 1 counterclockwise by 90°, the key body 1.2 continues to be inserted into the key hole of the first connecting body 3.2, and continues to be inserted downward into the key hole of the second lock core body 3.3 until the key body 1.2 cannot move forward At this time, the front end of the key body 1.2 is in contact with the end surface of the second connecting body 3.4;

3) After turning the key 1 clockwise by 180°, the key body 1.2 continues to be inserted into the key hole of the second connecting body 3.2, and continues to be inserted downward into the key hole of the third lock core body 3.5, and then continues to turn the key 1 to drive The lock core body 3 rotates 90° clockwise, and the rear part of the lock core drives the plectrum to drive the dead bolt to unlock.

The above are only descriptions of the preferred embodiments of the present invention, but should not be construed as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to vary. All changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims (2)

1. the assembly of an anti-theft key and tapered end, comprise key (1) and tapered end, described key (1) comprises the shank of the key (1.1) and key body (1.2), and the side of described key body (1.2) is provided with the tartar distributed along its length, described tapered end comprises housing (2), lock core body (3) and the pellet assembly matched with the tartar on key body (1.2), described lock core body (3) offers keyhole vertically, it is characterized in that: described lock core body (3) comprises vertically spaced first paragraph lock core body (3.1) successively, second segment lock core body (3.3) and the 3rd section of lock core body (3.5), the first connector (3.2) and the elastic connecting device for rotating reset is provided with between described first paragraph lock core body (3.1) and second segment lock core body (3.3), the second connector (3.4) and the elastic connecting device for rotating reset is provided with between described second segment lock core body (3.3) and the 3rd section of lock core body (3.5),

Two elastic connecting devices including extension spring (5) for connecting adjacent two-phase lock core body, one end of extension spring (5) being fixed on the upper alignment pin (4) of the preceding paragraph lock core body and the other end of extension spring (5) being fixed on the lower alignment pin (6) of next section of lock core body, described the first connector (3.2) and the second connector (3.4) are equipped with the deep-slotted chip breaker for accommodating extension spring (5);

The equal separated time (A) that the equal separated time (B) of described the first connector (3.2) and the keyhole width of second segment lock core body (3.3) is the keyhole width of first paragraph lock core body (3.1) rotates 90 ° in the counterclockwise direction; The equal separated time (A) that the equal separated time (C) of described the second connector (3.4) and the keyhole width of the 3rd section of lock core body (3.5) is the keyhole width of first paragraph lock core body (3.1) rotates 90 ° along clockwise direction.

2. the assembly of anti-theft key according to claim 1 and tapered end, it is characterized in that: described second segment lock core body (3.3) is provided with auxiliary locator, described second segment lock core body (3.3) is provided with the mounting groove vertically run through, described auxiliary locator comprises the retainer spring (7) be vertically arranged in mounting groove and the steel ball (8) being located at retainer spring (7) two ends, the lower surface of described the first connector (3.2) and the upper surface of described the second connector (3.4) are respectively equipped with the groove for accommodating steel ball (8) end.