WO1996012076A1

WO1996012076A1 - Locking device

Info

Publication number: WO1996012076A1
Application number: PCT/HU1995/000051
Authority: WO
Inventors: János FEHÉRDI
Original assignee: Feherdi Janos
Priority date: 1994-10-18
Filing date: 1995-10-18
Publication date: 1996-04-25
Also published as: HU9402990D0; HUH3880A

Abstract

The invention relates to a locking device that includes: a casing assembled of a tray, a cover and a front panel provided with an opening; a lock blade accommodated inside the casing, suitable to be pushed out thereof partially through the opening of the front panel; furthermore, a locking element e.g., insertion piece that can be encased into the casing; as well as an operating device inserted between the lock blade and the locking element; being the back of said lock blade that remains within the lock casing provided with a connection zone, having the connection zone at least one primary switching element and at least one secondary switching element as well as one or more receiving orifices surrounded by them; the operating device is provided with an intermediate assembly and a lever, being said lever connected to a raising surface being in contact with the locking element occasionally and suitable to move the lever in upward direction. The characteristic feature of the invention is that the lever (81) a lowering surface (81c) arranged on the locking element (7) on the side opposite to the raising surface (81b) as viewed in the operating position of the locking device is attached to.

Description

Locking device

This invention relates to a locking device that includes: a casing assembled of a tray, a cover and a front panel provided with an opening: a lock blade accommodated inside the casing, suitable to be pushed out thereof partially through the opening of the front panel; further more. a locking element e.g. insertion piece that can be encased into the casing; as well as an operating device inserted between the lock blade and the locking element; being the back of said lock blade that remains within the lock casing provided with a connection zone, having the connection zone at least one primary switching element and at least one secondary switching element as well as one or more receiving orifices surrounded by them : the operating device is provided with an intermediate assembly and a lever being said lever connected to a raising surface being in contact with the locking element occasionally and suitable to move the lever in upward direction.

The increased aesthetic requirements set to the windows and doors of various design made of new materials available as a result of the industrial development also had significant influence on the safety requirements relating to the locking mechanism used for doors and windows.

In our days, a more and more important aspect is that the lock blade will be as thick as possible suitable to be protruded from the lock casing as far as possible, while preserving a minimum structural depth of the lock casing. This requirement is further emphasized in the case of the so-called "portal locks"; however, it is also considered to be important in the case of other locks e.g. sunk mount locks and screw mount locks of both horizontal and vertical arrangements. Of course, the basic point continues to be the safety against unauthorized breaking up or opening of the lock.

A number of various designs w ere developed to meet the now requirements. In a significant part of these devices, the lock blade accommodated in the lock casing is driven by operating devices assembled of various motion transfer elements. A locking device of this kind is de-scribed e.g. in the patent publication documents No. 4.1 18.480. 4.019.350 and 4.143.292 issued in the German Federal Republic.

However, their common disadvantage is. that the lock casing is of large size and the subassemblies operating the lock blades are complicated; thus, their manufacture is cost intensive and the assembly is time consuming.

A further disadvantage is the high probability of operating failures due to the wear and possible blocking of the moving components.

It is also unfavourable that the components driving the lock blade can be accommodated only at the costs of thickness of the lock blade which, in turn, significantly reduces the strength and resistance of the lock blade.

Locking devices of smaller thickness are described in the patent publication documents No. 3.427.713. 3.316.261 and 3.037.01 X. issued in the German Federal Republic.

Again, the wear of moving components and. consequently, the possibility of failures is also unfavourable.

Their further disadvantage is that, although the depth of the lock casing will be significantly reduced, yet. the complexity of the moving mechanisms used in the locking device is increased.

Most of the known solutions have the common insufficiency that - in spite of their original function - they can be opened by using simple tools and operations, even without any key due either to the small cross section of the lock blade or the easily removable moving parts. The present invention aims at eliminating the disadvantages of the traditional locking devices provided by levers that makes it difficult to displace the lock blade and developing a design that, in spite of the small depth of the lock casing, accommodates a simple mechanism to drive the lock blade.

It was also an objective that the reduced depth shall not involve the increase in the remaining dimensions of the lock casing, while also preserving at least the same protrusion and cross section of the lock blade as in the case of traditional devices, thus - with the size reduced - also minimizing the possibility of unauthorized undoing of the lock.

The idea of invention was based on the realization that, by appropriate modification, the lever used traditionally can also be made suitable to drive the lock blade directly. If. namely, the lever is designed in a special geometric form while taking the trajectory of insertion piece into consideration and the lever is linked in an appropriate special motion transfer connection to the lock blade in a manner different from the solutions known so far the task can be solved.

According to the objective set. the locking device that includes: a casing assembled of a tray, a cover and a front panel provided with an opening; a lock blade accommodated inside the casing, suitable to be pushed out thereof partially through the opening of the front panel: furthermore, a locking element e.g. insertion piece that can be encased into the casing: as well as an operating device inserted between the lock blade and the locking element: being the back of said lock blade that remains within the lock casing provided with a connection zone, having the connection zone at least one primary switching element and at least one secondary switching element as well as one or more receiving orifices surrounded by them : the operating device is provided with an intermediate assembly and a lever being said lever connected to a raising surface being in contact with the locking element occasionally and suitable to move the lever in upward direction - is designed in a manner that, as viewed in the operating position of the locking device, a lowering surface located on the side of the locking element opposite to the raising surface and being in contact with the locking element occasionally is arranged on the lever.

A further feature of the locking device according to the invention may be that the lever is provided with a supporting body having a through-hole enclosing the locking element at least in part, while the raising surface and the lowering surface are formed by rims protruding from the supporting body along the through-hole.

In respect of the embodiment, it is advantageous that at least either of the lock blade or the lever has a guide track while the other is provided with a motion transfer element forming part of the intermediate assembly and engaged in the guide track, thus enabling the lock blade to be connected to the lever in a manner suitable to implement a motion transfer link.

In another version of the locking device, the guide track is assembled of: an intermediate section with main direction corresponding to the direction of motion of the lock blade and a first inclined section designed as the continuation of the intermediate section at an angle thereto at its one end . The guide track is completed with a second inclined section also designed as the continuation of the intermediate section at an angle thereto at its other end.

In a further different embodiment, the first inclined section and or the second inclined section of the guide track areas provided with a supporting tab.

In a further embodiment of the invention, the motion transfer element consists in a motion transfer element having a single guide pin.

In a likewise advantageous version of the locking device, the lever has a clamping element that prevents the lock blade from being displaced and the lock blade is provided with a stop tab pressed against the clamping element.

The solution according to the invention has a number of advantages. The most important feature is. that the depth of the lock casing can be significantly reduced, while maintaining its usual dimensions - in the case of both sunk mount and portal type locking devices. This enables the operating mechanism driving the lock blade to be significantly simplified as compared to the versions of lever-type locks widely used.

A further advantage is, that, due to the design of the lever completely different from those known so far and the new method of linking the lock blade and the lever together, both the lock blade displacement for one revolution and the thickness of the lock blade exceed those used in the solutions known so far. Thus, in addition to the advantages obtained in the aesthetic appearance of the windows and doors mounted with locks of this type, the safety of the lock against burglary is also significantly increased.

It shall also be considered an advantage that the small number of moving elements reduces the wear and the tendency to be blocked: thus reducing the probability of failures and improving the functional reliability.

It is also a favourable feature that the locking device according to the invention can be manufactured by using traditional technology and with reduced cost expenditures as compared to other lever-type locking devices.

In the following, the invention will be described by means of exemplary embodiments in detail, based on drawings as follows:

Fig. 1 shows the side view of the closing device according to the invention, in partial sectional view. Fig. 2 shows the l ever of closing device represented in Fig. 1 in an axonometric projection.

Fig. 3 shows a detail of another version of the locking device.

Fig. 4 shows the l ever represented in Fig. 3 on an axonometric projection.

Fig. 5 shows the side view of another locking device in its open position.

Fig. 6 shows the locking device of Fig. 5 in sectional view along the plane VI - VI.

Fig. 7 shows the motion transfer element of the locking device represented in Fig. 5 in an axonometric projection.

Fig. 8 shows the lock blade of the locking device represented in Fig. 5 in an axonometric projection.

Fig. 9 shows the lever of the locking device represented in Fig. 5 in an axonometric projection.

Fig. 10 shows a detail of the locking device represented in Fig. 5 in a sideview.

Fig. 1 1 shows an exemplary link between the lock blade and the l ever.

Fig. 12 shows another exemplary link between the lock blade and the l ever.

Fig. 13 shows a different exemplary link between the lock blade and the l ever.

Fig. 1 represents an exemplary version of the locking device according to the invention, which is a traditional sunk mount lock in this particular case. The lock casing 1 consists of the tray 1a. the cover 1c as well as the front panel 2 mounted on the lock casing 1 on the side of the lock blade 5.

The tray 1a and cover 1c of the lock casing 1 are fastened together by means of the fastening elements 1e connected through the holes 1d on the cover 1c to the screw bushings 1b fastened to the tray 1a.

Fig. 1 also shows the core 3 and the trap head 4a of the trap 4 - that can be operated by the core 3 in a manner known in itself - protruding out of the front panel 2. The part non covered by the cover 1c shows the placement of the locking element 7 which consists of the insertion piece 7a in this particular case.

Although, for the sake of completeness, the closing device shown in Fig. 1 includes the core 3 and the trap 4. it is not considered a necessary requirement and does not influence the essence of solution. It shall also be noted here that in order to better understand the design of the locking device according to the invention, certain components of no importance in respect of the solution are omitted in Fig 1. thus ensuring a better vi ew of the interconnection between and the location of the most important components.

Fig. 1 shows ho w the lever 81 of the operating device 8 enclose the insertion piece 7a. The lever 81 - as shown in Fig. 2 - includes the supporting body 81a. the hole 81 d machined in the supporting body 81 a and allowing the insertion piece 7a to pass through as well as the curved upper raising surface 81b arranged on the supporting body 81a and the lowering surface 81c also consisting of curved parts, divided by the external channel 812d of the hole 81 d into t wo parts.

The hole 81 d includes an internal opening 81 I d suitable to accommodate an insertion piece 7a designed as a cylinder lock, and a external channel 812d designed as an extension of the former, where the external channel 812d ends at the border of the supporting body 81 a. The supporting body 81 a of the lever 81 also holds the guide track 9 which consists in a trough-shaped recess assembled of an intermediate section 9b arranged essentially horizontally and a first inclined section 9a attached to one end 91b of the intermediate section 9b at an angle thereto as well as a second inclined section 9c designed as the continuation of the intermediate section 9b at an angle thereto at its other end 92b.

In this version of embodiment, the supporting tab 9d is also arranged in the first inclined section 9a and second inclined section 9c of the guide track 9 in order to prevent the lock blade 5 from being displaced - e.g. pushed in of pulled out - from outside.

Referring to Fig. 1. it can also be seen that the size of hole 8 Id formed in the supporting body 81 a of the lever 81 is adapted to the size of the insertion piece 7a by conforming the width of the internal opening 81 Id to the width of the insertion piece 7a.

Considering the arrangement shown in Fig. 1. the vertical dimension of the internal opening 81 Id exceeds the size of the insertion piece 7a, which enables the l ever 81 to be displaced vertically - i.e. raised and lowered, respectively, in relation to the locking element 7

In Fig 1. dotted lines represent the intermediate assembly 82 of the operating device 8. the motion transfer element 82a consists of a guide pin 821a. This guide pin 821a protrudes into the guide track 9 formed in the supporting body 81a of the l ever 81. Thus, the operating device 8 assembled of the lever 81 and the intermediate assembly 82 links the lock blade 5 and the locking element 7 together in this way.

Fig. 1 also shows that the lock blade head consists of the lock blade head 5a protruding from the lock casing 1 and the lock blade body 5b that remains retracted within the lock casing 1. In this version, the connection zone 6 is arranged in the back part 51 b of the lock blade body 5b. which includes one primary switching element 6a and one secondary switching element 6b as well as a single receiving orifice 6c surrounded by them. It shall be noted here that there may be more than one primary switching element 6a and secondary switching element 6b; thus, accordingly, receiving orifice 6c.

On turning the insertion piece 7a shown in Fig. 1 of Fig. 2, the crank 71a displaces and its external surface 71 1a reaches the raising surface 81b formed on the supporting body 81a of the lever 81. By turning the crank 71 a further, the crank 71a begins to raise the raising surface 81b and. thus, the lever 81 as well.

The upward movement of the lever 81 also causes the guide track 9 formed in the supporting body 81a of the l ever 81 to be displaced.

The first inclined section 9a arranged at one end 91b of the intermediate section 9b within the guide track 9 starts to move upwards and - due to the open position of the lock blade 5 - presses against the guide pin 821a arranged in the first inclined section 9a. The guide pin 821a begins to slide along the raising first inclined section 9a. while moving toward the intermediate section 9b of the guide track 9. thereby protruding the lock blade head 5a of the lock blade 5 through the opening 2a on the front panel 2 of lock casing 1.

With geometric dimensions selected appropriately, the receiving orifice 6c on the connection zone 6 formed on the back part 51 b of the 5b of lock blade 5 arrives above the crank 71 a of the insertion piece 7a just at the moment the crank 71a leaves the secondary switching element 6b and is able to enter the receiving orifice 6c.

At the same time, the guide pin 821a reaches the end of the first inclined section 9a and enters the horizontal intermediate section 9b at its one end 91 b that the guide pin 821 a can move along without restraint.

From this point onward, it is the insertion piece 7a that continues to drive - from right to left as shown in Fig. 1 - the lock blade 5 by means of the crank 71a engaged in the receiving orifice 6c of the connection zone 6. The mechanical link between the crank 71a and the lock blade 5 remains until the crank 71a reaches its leftmost position and disengages from the receiving orifice 6c of the connection zone 6. At this moment, however, the guide pin 821a which acts as the motion transfer element 82a of the intermediate assembly 82 arrives at the other end 92b of the intermediate section 9b on the guide track 9 and. while entering the second inclined section 9c, is pressed against its wall.

By turning the insertion piece 7a further. the crank 71 a is pressed against the lowering surface 81c of the lever 81. .As a result of the downward force exerted by the crank 71a. the lowering surface 81 c of the lever 81 moves downward. As a result of its shape, the second inclined section 9c of the guide track 9 following the downward motion of the lever 81 drives the guide pin 821a protruding from the back part 51 b of the lock blade 5 to the left. Finally, with the l ever 81 lowered to its Iower rest position, the lock blade head 5a of the lock blade 5 is protruded to its full useful length from the lock casing 1.

With the function explained, it can be seen that, due to the interaction between the guide track 9 as w ell as the raising surface 81 b and lowering surface 81c of the lever 81. respectively, the displacement of the lock blade 5 during one revolution of the locking element 7 is significantly larger as compared to that would be obtained during the link between the crank 71a and the lock blade 5.

.Another advantage of this design is that, with the lock blade 5 completely protruded, the crank 71a is pressed against the lowering surface 81c of the lever 81. thus preventing it from being raised. In fact, as a result of this stable position, the guide pin 821 a resting on and pressed against the supporting tab 9d arranged along the second inclined section 9e within the guide track 9 of the lever 81 is prevented from being pushed back to the lock casing 1. On opening the locking device shown in Fig. 1. the process described above takes place in a reverse order, except that the lock blade 5 moves from left to right. At the end of motion, the lock blade head 5a of the lock blade 5 will be pulled back to the lock casing 1 and the guide pin 821a arranged on the intermediate assembly 82 of the operating device 8 moves up to the supporting tab 9d mounted at the upper end of the first inclined section 9a of the guide track 9.

Figs. 3 and 4 show a locking device somewhat different from that described above. However. this version also includes the lever 81 and intermediate assembly 82 of the operating device 8. Again, the lever 81 is provided with the raising surface 81b and lowering surface 81 c arranged on the supporting body 81a as well as with the hole 81 d. The guide track 9 consisting of the first inclined section 9a. intermediate section 9b and the second inclined section 9c are also included.

A fundamental difference is. however that the lever 81 also includes the clamping element 81e and the spring support 81 f Another difference is. that the lever 81 is made of plate instead of being made by powder metallurgic method as in the version described above. As a result, the lowering surfaces arranged at the bottom of supporting body 81a of the l ever 81 are made of plate by bending, thus, their have flat surfaces. This, however, has no unfavourable influence on the function.

The motion transfer element 82a of the intermediate assembly 82 -in a similar manner as described in relation to Fig. 1 - also consists of the guide pin 821 a completed with the auxiliary pin 822a. that engages with the guide track 9 of the lever 81.

The guide pin 821 a is arranged on the inner side of the lock blade 5. represented by dotted lines, while the auxiliary pin 822a coaxial to the guide pin 821 a is arranged on the outer side of the lock blade 5. Fig. 3 also shows that the upper part of the lock blade 5 is provided with a stop tab 5c which consists of the barrier 51c including the indent 52c. During the operation of the closing device shown in Fig 3. the process is essentially the same as in the cases described above, except that the lock blade 5 also performs a tilting movement: in fact, the lowest point of the primary switching element 6a of the connection zone 6 arranged on the back part 51 b of the lock blade body 5b of lock blade 5 is below the top of the insertion piece 7a. Thus, during its revolution, the crank 71 a lifts the bottom of primary switching element 6a of the connection zone 6 over the insertion piece 7a.

The tilting is controlled by the auxiliary pin 822a which, while moving along the flute If formed as a guide path in the cover l c - not shown in the figure - of lock casing 1, causes the lock blade 5 to perform the tilting movement required.

Another difference in the function is that, as soon as the crank 71 a pushes the lock blade 5 forward during the process of protruding to an extent that the crank 71a is disengaged from the receiving orifice 6c of connection zone 6 and also leaves the raising surface 81 b of the lever 81. the spring 10 arranged between the spring support 81 f and the lock casing 1 pushes the lever 81 back toward its rest position.

At this moment, the clamping element 81 e is lowered to a small extent behind the barrier 51 c and. by clamping the barrier 51 c. prevents the lock blade 5 from sliding back. Preferably, the spring 10 is not strong enough, however. to force the lever 81 to move further downwards, while enabling it to push the lock blade 5 further ahead by means of the guide pin 821 a engaged in the guide track 9. Again, the reset w ill be implemented as a result of the interaction between the crank 71 a and the lowering surface 81 c arranged on the lever 81 . With the lock blade 5 fully protruded, the crank 71a is supported on the lowering surface 81c of the l ever 81 and causes it to remain in its lower position, thus preventing the lock blade 5 from being pushed back. The clamping element 81 e pressed against the barrier 51c as well as the guide pin 821a pressed against the supporting tab 9d arranged in the second inclined section 9c of guide track 9 serve for the same purpose.

Another different exemplary embodiment is shown in Figs. 5 to 10. As shown in Fig. 7. the motion transfer element 82a of the intermediate assembly 82 consists of a collecting plate 824a. the guide pin 821a arranged on one side of the collecting plate 824a. the driving pin 823a arranged on each side of the guide pin 821a. as well as the auxiliary pin 822a protruding from the side of collecting plate S24a opposite to that holding the guide pin 821a.

The lock blade 5 represented in Fig. 8 is also of special design: in fact, the grooves 5e. the indent 5f and the hole 5g are machined into the back part 51b on the lock blade body 5b of lock blade 5.

Fig. 9 shows the lever 81. the raising surface 81 b and lowering surface 81 c of which are formed by both curved and straight rims standing out of the supporting body 81 a. The guide track 9 composed of several parts is also formed in the supporting body 81a of l ever 81.

A well shown in Figs 5 and 6. the depth of lock casing 1 of the locking device designed as portal lock is essentially equal to the total length of the lock blade head 5a and the lock blade body 5b of lock blade 5. Nevertheless. the design according to the invention is well suitable to be used even in this case.

The primary switching element 6a and secondary switching element 6b arranged within the connection zone 6 are engaged into the grooves 5e of the lock blade 5 so as to allow them to slide along, while the one of the driving pins 823a of motion transfer element 82a arranged on the intermediate assembly 82 connects to the primary connection bed 61a of the primary switching element 6a and the other of the driving pins 823a of motion transfer element 82a arranged on the intermediate assembly 82 connects to the secondary connection bed 61b of the secondary switching element 6b. Between the primary switching element 6a and the secondary switching element 6b. the guide pin 821 a passes through the hole 5g formed in the recess 5f and - as shown well in Fig 6 - it also extends over the guide track 9 on the lever 81 and. then, the flute If formed in the tray la of lock casing 1.

The auxiliary pin 822a - shown in Fig. 1 - arranged on the collecting plate 824a of the motion transfer element 82a moves along the curved flute If machined into the cover l c of the lock casing 1 , which also forms the guide path controlling the motion of the collecting plate 824a.

In the embodiment represented in Fig. 5. the intermediate assembly 82 of the operating device 8 is used not only for motion transfer between the lever 81 and the lock blade 5: instead, it also controls the actual position of the primary switching element 6a and the secondary switching element 6b of the connection zone 6 during the closing and opening and. in addition, secures the lock blade 5 from being displaced at its end positions. by means of the guide pin 821a.

The function of this version differs from that described in relation to Fig. 1 only in that the primary switching element 6a and the secondary switching element 6b controlled by the motion transfer element 82a of the intermediate assembly 82 during the rotational movement of the crank 71 a of insertion piece 7a move upwards and downwards depending on the position of the crank 71 a.

Figs 1 1 to 13 show further possible implementations of the intermediate assembly 82 and. at the same time, illustrate that, in addition to establishing the link between the lever 81 and the lock blade 5, the inter mediate assembly 82 is also used to control the movement of the elements arranged on the connection zone 6. In Fig 1 1. the intermediate assembly 82 is provided with e.g. the wing 825a to displace the primary switching element 6a and secondary switching element 6b. The reset of these parts is performed by the "hidden" springs not shown in Fig. 1 1.

In the version according to Fig. 12. the intermediate assembly 82 drives the plate forming the connection zone 6 as a mechanical "linkage". Or even, as shown in Fig. 13. the intermediate assembly 82 itself is also able to serve as the primary switching element 6a. secondary switching element 6b and receiving orifice 6c of the connection /.one 6 in certain cases at the same time.

The locking device according to the invention is well suitable to be used in applications that require locking means of small depth, reliable function and with long protrusion of the lock blade.

Claims

C L A I M S

1. Locking device that includes: a casing assembled of a tray, a cover and a front panel provided with an opening: a lock blade accommodated inside the casing, suitable to be pushed out thereof partially through the opening of the front panel: furthermore. a locking element e.g. insertion piece that can be encased into the casing: as well as an operating device i nserted between the lock blade and the locking element: being the back of said lock blade that remains within the lock casing provided with a connection zone, having the connection zone at least one primary switching element and at least one secondary switching element as well as one or more receiving orifices surrounded by them: the operating device is provided with an intermediate assembly and a l ever, being said l ever connected to a raising surface being in contact with the locking element occasionally and suitable to move the l ever in upward direction, c h a r a c t e r i z e d b y that the l ever (81 ) a lowering surface (81 c) a rranged on the locking element (7) on the side opposite to the raising surface (81 b) as vϊewed in the operating position of the locking device is attached to.

2. Locking device as in claim 1. c h a r a c t e r i z e d b y that the lever (81 ) is provided with a supporting body (81 a ) having a hole (81 d) enclosing the locking element (7) at least in part, while the raising surface (81 b) and the lowering surface (81 c) are formed by rims protruding from the supporting body(81 a) along the hole (81 d).

3. Locking device as either of the claims 1 or 2. c h a r a c t e r i / e d b y that at least cither of the lock blade (5 ) or the lever (81 ) has a guide track (9) while the other is provided with a motion transfer element (82a ) forming part of the intermediate assembly (82) and engaged in the guide track (9). thus enabling the lock blade (5 . to be connected to the l ever (81 ) in a manner suitable to implement a motion transfer link.

4. Locking device as in claim 3. characterized by that the guide track (9) is assembled of: an intermediate section (9a) with main direction corresponding to the direction of motion of the lock blade (5). and a first inclined section (9a) designed as the continuation of the intermediate section (9b) at an angle thereto at its one end (91b).

5. Locking device as in claim 4. characterized by that the guide track (9) is completed with a second inclined section (9c) also designed as the continuation of the intermediate section (9b) at an angle thereto at its other end (92b).

6. Locking device as in either of the claims 4 or 5. characterized by that the first inclined section (9a) and or the second inclined section (9c) of the guide track (9) are is provided with a supporting tab (9d)

7. Locking device as in any of the claims 1 to 6. characterize d b y that the motion transfer element (82a) consists in a motion transfer element (82a) having a single guide pin (821a).

8. Locking device as in any of the claims 1 to 7. c h a r a c t e r i z e d b y that the lever (81) has a clamping element (81 e) to prevent the lock blade (5) from being displaced and the lock blade (5) is provided with a stop tab (5c) pressed against the clamping element (81e).