HRP990157A2

HRP990157A2 - Cylinder lock and flat key

Info

Publication number: HRP990157A2
Application number: HRA1064/98A
Authority: HR
Inventors: Kurt Prunbauer
Original assignee: Evva Werke
Priority date: 1997-10-31
Filing date: 1999-05-26
Publication date: 2000-04-30
Also published as: HRP990157B1

Description

Izum se odnosi na cilindričnu bravu s kućištem cilindra i u njemu zakretljivom cilindričnom jezgrom, koja ima kanal za prihvat ključa, i gdje su predviđeni ključem upravljani pomični središnji svornjaci ili najmanje jedan njihovim pomičnim položajima opipavajući zaporni element, te zapornom elementu pripadajući utorni odsječak kućišta cilindra. Nadalje se izum odnosi na plosni ključ ove cilindrične brave. The invention relates to a cylinder lock with a cylinder housing and a rotatable cylindrical core in it, which has a channel for receiving the key, and where movable central bolts controlled by a key or at least one of them touching the locking element with their movable positions are provided, and the slotted section of the cylinder housing belonging to the locking element. Furthermore, the invention relates to the flat key of this cylinder lock.

Zadaća predloženog izuma je predvidjeti takvu konstrukciju, koja omogućuje veliki broj varijacija, a da je pri tom pouzdana kod svakodnevne uporabe. Dijelovi brave trebaju biti jeftini za proizvodnju, te moraju imati samo malo različitih ugradbenih dijelova. Nadalje treba predvidjeti po mogućnosti veliku sigurnost protiv prepoznavanja brave i otvaranja provalnim ključevima. Dosadašnje cilindrične brave navedene vrste ispunjavaju ove zahtjeve samo u nedostatnoj mjeri. The task of the proposed invention is to provide such a construction, which allows for a large number of variations, while being reliable in everyday use. The parts of the lock should be cheap to manufacture, and should have only a few different built-in parts. Furthermore, it is necessary to provide, if possible, a high level of security against the recognition of the lock and opening with burglary keys. Previous cylindrical locks of the mentioned type meet these requirements only to an insufficient extent.

Prema predloženom izumu, cilindrična brava je naznačena time, da je središnji svornjak pomičan u provrtu smještenom približno paralelno spram kanala ključa, te da ima na jednom kraju opipnu izbočinu, koja strši u kanal ključa, tako da je središnji svornjak opružno prednapet i da ima na bočnoj strani okrenutoj od kanala ključa, barem jedan oslobađajući utor za zahvat opipnog čepa zapornog elementa. According to the proposed invention, the cylindrical lock is characterized by the fact that the central bolt is movable in a bore located approximately parallel to the key channel, and that it has a tactile projection at one end, which protrudes into the key channel, so that the central bolt is spring-loaded and has on the side facing away from the key channel, at least one releasing groove for engagement of the tactile plug of the locking element.

Ključ prema izumu je naznačen time, da je pero ključa načinjeno od upravljačke krivulje, koje su izvedene obostrano od uzdužne središnje ravnine, te da plosni ključ ima s obje strane po jedno središnje rebro, koje se proteže preko dužine stabljike ključa. The key according to the invention is indicated by the fact that the key blade is made of control curves, which are derived on both sides from the longitudinal central plane, and that the flat key has one central rib on both sides, which extends over the length of the key stem.

Nadalje će izum biti pobliže opisan na temelju primjera u slikama 1 do 17. Furthermore, the invention will be described in more detail based on the examples in Figures 1 to 17.

Slika 1 prikazuje presjek kroz bravu prema izumu. Figure 1 shows a section through the lock according to the invention.

Slika 2 prikazuje isti presjek kao i slika 1, u drugom funkcionalnom položaju cilindrične jezgre. Figure 2 shows the same section as Figure 1, in another functional position of the cylindrical core.

Slika 3 pokazuje odlomljeno pogled na cilindričnu jezgru. Figure 3 shows a broken away view of the cylindrical core.

Slike 4 do 6 pokazuju jedne do drugih smještene poglede jedne izvedbe središnjeg svornjaka. Figures 4 to 6 show side-by-side views of one embodiment of the central bolt.

Slike 7 do 9 predočavaju tri pogleda na zaporni element. Figures 7 to 9 show three views of the locking element.

Slike 10 i 11 prikazuju plosni ključ jedne izvedbene varijante u bokocrtu i pogledu odozgo. Figures 10 and 11 show a flat key of one embodiment in side plan and top view.

Slika 12 prikazuje bokocrt jedne daljnje prednosne izvedbe ključa. Figure 12 shows a side view of a further preferred embodiment of the key.

Slika 13 prikazuje presjek kroz teoretski poprečni profil ključa. Figure 13 shows a section through the theoretical transverse profile of the key.

Slike 14 i 15 prikazuju shematske prikaze funkcionalnih izvedbi. Figures 14 and 15 show schematic representations of functional embodiments.

Slika 16 pokazuje presjek kroz bravu i ključ. Figure 16 shows a section through the lock and key.

Slika 17 prikazuje bokocrt ključa u području vrška. Figure 17 shows a side view of the key in the tip area.

Prema slici 1 je u kućištu cilindra 1 smještena okretljiva cilindrična jezgra 2, pri čemu su ova dva dijela međusobno odvojena cilindričnom razdjelnom plohom 23. U sredini cilindrične jezgre 2 je smješten kanal 3 za ključ u kojem sjedi ključ 4. According to Figure 1, a rotating cylindrical core 2 is located in the cylinder housing 1, and these two parts are separated from each other by a cylindrical dividing surface 23. In the middle of the cylindrical core 2, there is a key channel 3 in which the key 4 sits.

Prema objema stranama kanala 3 za ključ protežu se paralelno k tome uvijek niz provrta 8 za središnje svornjake, u kojima su pomično smješteni središnji svornjaci 5. Preko opruge 16 središnjih svornjaka, isti su prednapeti prema gore. Parallel to both sides of the key channel 3, there are always a series of holes 8 for the central bolts, in which the central bolts 5 are movably located. Via the spring 16 of the central bolts, they are biased upwards.

Svaki središnji svornjak 5 ima na donjem kraju po jedan dodirni izdanak 9, koji se proteže do kanala 3 za ključ, naime do ili blizu središnje uzdužne ravnine 13 kanala za ključ. Each central pin 5 has at its lower end a contact projection 9, which extends to the key channel 3, namely to or close to the central longitudinal plane 13 of the key channel.

Pero ključa ima uzduž središnje uzdužne ravnine dvije upravljačke krivulje, koje će kasnije biti još pobliže pojašnjene. Lijeva upravljačka krivulja upravlja sve lijevo smještene središnje svornjake, a desna upravljačka krivulja upravlja sve desno raspoređene središnje svornjake. Već prema izvedbi obiju upravljačkih krivulja, bivaju središnji svornjaci postavljeni u definirane upravljačke visine, pri čemu su u slici 1 prikazana dva ovakva upravljačka položaja. The key pen has two control curves along the central longitudinal plane, which will be explained in more detail later. The left control curve controls all left-aligned center studs, and the right control curve controls all right-aligned center studs. Already according to the design of both control curves, the central bolts are placed in defined control heights, whereby two such control positions are shown in Figure 1.

Svaki središnji svornjak ima na boku 10, koji je okrenut od kanala za ključ, dva oslobađajuća utora 11, u koje mogu zahvatiti opipni čepovi 12 zapornog elementa 6, ako je središnji svornjak preko odgovarajućeg ključa pritisnut u položaj za oslobađanje. Each central pin has on its side 10, which faces away from the key channel, two release slots 11, into which the feeler plugs 12 of the locking element 6 can engage, if the central pin is pressed into the release position via the corresponding key.

Zaporni elementi 6 su zaporne letvice, koje su pomoću opruge 24 prednapete u smjeru prema kućištu cilindra. Na slici 1 u prikazanom nultom položaju cilindrične jezgre, dakle neokrenutom položaju, nalaze se zaporni nastavci 21 zapornog elementa 6 u zahvatu sa po jednim utornim odsječkom 7 u kućištu cilindra. Naletne plohe 25 pritišću zaporni element 6 prema unutra u cilindričnu jezgru, ako su središnji svornjaci 5 postigli oslobađajući položaj prema slici 1. Ako središnji svornjak zauzme neki drugi položaj (zatvarajući položaj), što je slučaj kod nekog pogrešnog ključa ili kod pogreške na ključu, tada je uguravanje zapornog elementa 6 ispod razdjelne plohe 23 cilindrične jezgre spriječeno, a zaporni nastavci 21 ostaju zaglavljeni u utornom odsječku 7, čime je spriječeno zakretanje cilindrične jezgre, te brava ostaje blokirana. The locking elements 6 are locking slats, which are pre-tensioned by means of a spring 24 in the direction towards the cylinder housing. In Fig. 1, in the shown zero position of the cylindrical core, i.e. in the non-turned position, there are locking extensions 21 of the locking element 6 in engagement with one groove section 7 each in the cylinder housing. The impact surfaces 25 press the locking element 6 inwards into the cylindrical core, if the central pins 5 have reached the releasing position according to Figure 1. If the central pin takes another position (closing position), which is the case with a wrong key or a key error, then the insertion of the locking element 6 under the dividing surface 23 of the cylindrical core is prevented, and the locking extensions 21 remain stuck in the groove section 7, which prevents the rotation of the cylindrical core, and the lock remains blocked.

Zaporni nastavci 21 zapornih elemenata 6 i utorni odsječci 7 su smješteni razmaknuto spram središnje ravnine 14 cilindrične jezgre 2. Radi ove asimetrije oko središnje ravnine 14 se omogućava, da se nakon jedne vrtnje cilindrične jezgre za 180°, kako je prikazano na slici 2, zaporni elementi 6 se ne upuštaju istovremeno u utorne odsječke 7 i da se zaporni svornjaci ne mogu premještati. Time se ključ ne može zabunom izvući. Ovo je moguće tek nakon punog okreta od 360°, ako cilindrična jezgra zauzme opet položaj prikazan na slici 1. The locking extensions 21 of the locking elements 6 and the groove sections 7 are located at a distance from the central plane 14 of the cylindrical core 2. Because of this asymmetry around the central plane 14, it is possible that after one rotation of the cylindrical core by 180°, as shown in Figure 2, the locking the elements 6 do not engage simultaneously in the slot sections 7 and the locking bolts cannot be moved. This prevents the key from being removed by mistake. This is only possible after a full 360° turn, if the cylindrical core takes the position shown in Figure 1 again.

Slika 3 prikazuje razlomljeno prednji dio cilindrične jezgre 2, sa po dva provrta 8 za središnji svornjak spram obje strane kanala 3 za ključ. Za ovdje primjenjene središnje svornjake pravokutnog presjeka prema slikama 4 do 6 su provrti 8 za središnje svornjake izvedeni analogno s pravokutnim presjekom. Kroz izreze 26 hvataju dodirni izdanci 9 u kanal za ključ približno do središnje uzdužne ravnine 13. Figure 3 shows the broken front part of the cylindrical core 2, with two holes 8 for the central pin against both sides of the channel 3 for the key. For the central studs with a rectangular section used here, according to Figures 4 to 6, the holes 8 for the central studs are made analogously to the rectangular section. Through the cutouts 26, the contact protrusions 9 engage in the key channel approximately to the central longitudinal plane 13.

Paralelno spram provrta središnjih svornjaka su predvideni opružni provrti 15, koji svaki puta preuzimaju oprugu 16 središnjeg svornjaka. Kroz prolazne otvore 27 zahvaćaju prihvatne ušice 17 središnjih svornjaka 5 u opružne provrte 15. Spring holes 15 are provided parallel to the holes of the central bolts, which each time take over the spring 16 of the central bolt. Through the through holes 27, the receiving lugs 17 of the central bolts 5 engage in the spring holes 15.

Slike 4 do 6 prikazuju tri pogleda izvedbenog primjera za središnji svornjak 5 u pripadajućim izrezima jednih spram drugih. Dva oslobađajuća utora 11 su ovdje ucrtana u najgornjem položaju. Oslobađajući utori mogu biti raspoređeni iznad visine središnjeg svornjaka i pomaknuto, već prema smještaju pripadajuće upravljačke visine ključa. Može biti isto tako predviđeno više od dva oslobađajuća utora na jednom središnjem svornjaku, ako je potrebno da postoji više oslobađajućih položaja u zabravnim uređajima. Prikazana varijacija odgovara na slici 1 lijevo prikazanom položaju. Desno je u slici 1 ucrtan drugi varijacijski položaj s drugačijim rasporedom oslobađajućih utora uzduž boka 10 središnjeg svornjaka 5. Dodirni izdanak 9 je izveden na njegovoj upravljačkoj plohi 29 sedlasto. Na prihvatnu ušicu 17 hvata odozdo opruga 16 središnjeg svornjaka. Figures 4 to 6 show three views of an exemplary embodiment for the central bolt 5 in the respective cutouts against each other. The two release slots 11 are drawn here in the uppermost position. The releasing slots can be arranged above the height of the central bolt and moved, but according to the location of the corresponding control height of the key. More than two release slots on one central bolt may also be provided, if it is necessary to have more release positions in the locking devices. The variation shown corresponds to the position shown on the left in Figure 1. On the right in Figure 1, another variation position is drawn with a different arrangement of the releasing slots along the side 10 of the central pin 5. The contact protrusion 9 is made on its control surface 29 saddle-shaped. The spring 16 of the central pin grips the receiving eyelet 17 from below.

Slike 7 do 9 prikazuju izvedbu zapornog elementa 6 kao zapornu letvicu za niz od pet središnjih svornjaka. Svakom središnjem svornjaku pripadaju po dva opipna čepa 12, koji mogu kod oslobađajućeg položaja središnjih svornjaka zahvatiti u njihove oslobađajuće utore 11. Slika 9 prikazuje asimetričnu izvedbu zapornog elementa uz tvorbu zapornog nastavka 21 s jednom kosom naletnom plohom 30. Neprolazni uvrti 31 služe za prihvat tlačnih opruga 24, vidi slike 1 i 2. Figures 7 to 9 show the design of the locking element 6 as a locking slat for a series of five central bolts. Each central bolt has two tactile plugs 12, which can engage in their releasing slots 11 when the central bolts are released. Figure 9 shows the asymmetric design of the locking element with the creation of a locking extension 21 with a single slanted landing surface 30. Non-passing screws 31 are used for receiving pressure spring 24, see pictures 1 and 2.

U okviru izuma može biti zaporna letvica opremljena i sa zaštitom od preopterećivanja, kako je bilo objavljeno u AT~ prijavi A 965/96. Pri tome zaporna letvica obuhvaća barem jedan upravljački klizač i jedan opipni klizač, koji su protivno sili opruge jedan spram drugog pomični. Upravljački klizač ima pri tome jednu naletnu plohu, kojom kod zakretanja cilindrične jezgre naleti na upravljački brid utornog odsječka, te pritisne zapornu letvicu u cilindričnu jezgru. U blokirajućem položaju kliznog elementa biva radijalno upuštanje opipnog klizača spriječeno, te daljnje zakretanje cilindrične jezgre blokirano. Time su kod toga funkcije opipavanja i uglavljivanje odvojene medusobno. Within the framework of the invention, the stop slat can be equipped with overload protection, as was published in AT~ application A 965/96. In this case, the locking slat includes at least one control slide and one tactile slide, which move against each other against the force of the spring. At the same time, the control slider has a contact surface, which, when the cylindrical core is rotated, collides with the control edge of the slotted section, and presses the locking strip into the cylindrical core. In the blocking position of the sliding element, radial insertion of the tactile slide is prevented, and further rotation of the cylindrical core is blocked. In this way, the functions of probing and locking are separated from each other.

Slika 10 prikazuje bokocrt jednog pripadajućeg ključa prema predloženom izumu, a slika 11 pogled odozgo. Područje držala ključa 32 je odlomljeno prikazano. Figure 10 shows a side view of one associated key according to the proposed invention, and Figure 11 shows a top view. The key holder area 32 is shown broken away.

Stabljika ključa 18 ima na peru i leđima ključa uzduž središnje uzdužne ravnine 13 po dvije upravljačke krivulje 20, 20', tako da na svakom upravljačkom mjestu 33 postoje po dvije upravljačke visine za pozicioniranje pripadajućih središnjih svornjaka 5. Ovdje prikazana varijacija je ovdje samo kao primjer. Ukupno postižni broj varijacija je prema ovoj konstrukciji veoma visok. Ključ je predviđen kao obostrani ključ, može se dakle ugurati u dva zakrenuta položaja u bravu. Središnje rebro 19 prostire se s obje plosne strane ključa do vrška ključa i služi vođenju ključa u kanal ključa kao i stabilnosti ključa. Nadalje, može svako središnje rebro 19 biti primjenjeno da nosi kodiranje za ostale opipne elemente ili zaporne elemente npr. u obliku odsječaka. The stem of the key 18 has two control curves 20, 20' on the tongue and the back of the key along the central longitudinal plane 13, so that at each control point 33 there are two control heights for positioning the associated central bolts 5. The variation shown here is here only as an example. . The total achievable number of variations according to this construction is very high. The key is designed as a double-sided key, so it can be inserted in two rotated positions in the lock. The central rib 19 extends from both flat sides of the key to the tip of the key and serves to guide the key into the key channel as well as to stabilize the key. Furthermore, each central rib 19 can be used to carry coding for other tactile elements or locking elements, for example in the form of segments.

Kako je bilo prije navedeno, da prolaze provrti 8 za središnje svornjake približno paralelno spram kanala za ključ, to uključuje i one izvedbe, gdje su provrti za središnje svornjake smješteni i nešto malo ukoso. As it was stated before, that the holes 8 for the central bolts pass approximately parallel to the channel for the key, this also includes those versions, where the holes for the central bolts are located slightly obliquely.

Slike 12 do 17 predočavaju jednu daljnju izvedbenu varijantu za plosni ključ prema izumu i pripadajuću bravu. Figures 12 to 17 show a further variant of the flat key according to the invention and the associated lock.

Stabljika ključa 18 ima obostrano paralelno prema i sa jedne strane središnjeg rebra 19, jedno upravljačko rebro 35. Na upravljačkim mjestima 33 dodatno su predviđeni uz upravljačke plohe upravljačkih krivulja 20, 20', daljnje upravljačke plohe i to, pomoću slijedećeg brida 37 upravljačkog rebra 35, koje mogu biti dodirne sa pripadajućim središnjim svornjacima. Gledano od vrška ključa, prva dva upravljačka mjesta su tvorena od samog donjeg brida 37 upravljačkog rebra 35. Kod trećeg upravljačkog mjesta je predviđeno udubljenje 36. Kod posljednjeg upravljačkog mjesta ovog ključa je upravljačko rebro 35 prekinuto. The stem of the key 18 has on both sides, parallel to and on one side of the central rib 19, one control rib 35. At the control points 33, in addition to the control surfaces of the control curves 20, 20', further control surfaces are additionally provided, using the next edge 37 of the control rib 35 , which can be in contact with the corresponding central studs. Seen from the top of the key, the first two control points are formed from the very bottom edge 37 of the control rib 35. At the third control point, a recess 36 is provided. At the last control point of this key, the control rib 35 is interrupted.

Donji brid 37 upravljačkog rebra 35 tvori time na jednoj plosnoj strani ključa drugu upravljačku krivulju 39, koja je dodatno predviđena prema prvoj upravljačkoj krivulji 20' na peru 22 ključa. Time se znatno povećava broj varijacija ključa. The lower edge 37 of the control rib 35 thus forms on one flat side of the key a second control curve 39, which is additionally provided according to the first control curve 20' on the tongue 22 of the key. This significantly increases the number of key variations.

Slika 13 pokazuje shematski presjek kroz nedovršeni profil jednog takvog ključa kao primjer ucrtanih mogućnosti varijacija. Prve upravljačke krivulje 20, 20' uvijek nude pet varijacijskih dubina. Pomoću upravljačkog rebra 35 načinjene druge upravljačke krivulje 39, uvijek nude dvije upravljačke dubine. Ključ je kao okretljivi ključ izveden simetrično, tako da može pripadajuću bravu zatvarati u oba položaja umetanja. Figure 13 shows a schematic section through an unfinished profile of one such key as an example of the plotted variation possibilities. The first control curves 20, 20' always offer five variation depths. The second steering curves 39 made with the steering rib 35 always offer two steering depths. The key is designed symmetrically as a swivel key, so that it can close the associated lock in both insertion positions.

Presjek prema slici 14 predočava opipavanje prve upravljačke krivulje 20' na upravljačkom mjestu izvedenom od odgovarajućeg središnjeg svornjaka 5, čiji dugački dodirni izdanak 9 doseže blizu središnje uzdužne ravnine 13. Kod ovoga rasporeda se dodatna upravljačka dubina 39 ne dodiruje, te je time bez djelovanja. The cross-section according to Figure 14 shows the sensing of the first control curve 20' at the control point derived from the corresponding central bolt 5, whose long contact projection 9 reaches close to the central longitudinal plane 13. In this arrangement, the additional control depth 39 is not touched, and thus has no effect.

Slika 15 prikazuje jednu varijantu, kod koje je upravljačka dubina prve upravljačke krivulje 20' izvedena dublje nego ona od druge upravljačke krivulje 39. Dodirni izdanak 9 straga zahvaća s nastavkom 40 upravljačko rebro 35. Slika 17 prikazuje ovo dodirno mjesto u bokocrtu ključa. Figure 15 shows one variant, in which the control depth of the first control curve 20' is made deeper than that of the second control curve 39. The contact protrusion 9 engages the control rib 35 at the back with the extension 40. Figure 17 shows this contact point in the side view of the key.

Slika 16 predočava shematski presjek kroz bravu s uguranim ključem. Drugačije nego kod funkcijskog položaja prema slici 14, dodirni je izdanak 9 središnjeg svornjaka 5 izveden kraće i doseže samo do područja druge upravljačke krivulje 39, tako da na tom opipnom mjestu djeluje samo druga upravljačka krivulja. Figure 16 shows a schematic section through a lock with an inserted key. Differently than in the functional position according to Figure 14, the contact projection 9 of the central pin 5 is made shorter and reaches only to the area of the second control curve 39, so that only the second control curve acts on that tactile location.

Kod prikazanog rasporeda od dvije upravljačke krivulje na svakoj plosnoj strani ključa, može se postići veliki broj varijacija. Primjenjeni dijelovi su jeftini za proizvodnju i mehanički veoma stabilni. Širina upravljačkog rebra 35 može biti i veća, tako da može biti predviđeno više upravljačkih dubina (npr. tri), jer središnja rebra mogu glede položaja na ključ, širine i oblika presjeka varirati, kako bi se broj varijacija mogao još više povećati. With the arrangement shown of two control curves on each flat side of the key, a large number of variations can be achieved. The used parts are cheap to produce and mechanically very stable. The width of the control rib 35 can be larger, so that more control depths can be provided (e.g. three), because the central ribs can vary in terms of position on the key, width and shape of the section, so that the number of variations can be increased even more.

Claims

1. Cylindrical lock with a cylinder housing and a rotatable cylindrical core in it, which has a channel for receiving the key and where movable central bolts controlled by a key are provided, and at least one contact locking element for sensing their movable positions, and a slotted section of the cylinder housing belonging to the locking element, characterized by the fact that the central pin (5) is movable in a hole (8) arranged approximately parallel to the key channel (3) for the central pin, that it has a contact protrusion (9) at one end protruding into the key channel (3), and that the central bolt (5) is spring-loaded and that it has at least one releasing groove (11) on the side (10), which is facing away from the channel (3) of the key, for engaging the tactile plug (12) of the locking element (6).

2. Cylindrical lock according to claim 1, characterized by the fact that on both sides of the channel (3) for the key, a series of several central bolts (5) are provided, which contact projections (9) reach either to or close to the central longitudinal plane (13) of the channel (3) for the key, which touch the control surfaces of the key, which are made along the central longitudinal plane (13) (long contact protrusion), or which end at a distance from the central longitudinal plane (13) (short contact protrusion), and which are operated via the control surfaces of the key on the control ribs of the key.

3. A lock according to claim 2, characterized in that the long contact protrusion has one contact surface near the central longitudinal plane and is cut to release the control rib.

4. Cylindrical lock according to claims 1 to 3, characterized by the fact that each row of central bolts (5) as a locking element (6) has one locking slat, and that the locking element is spring-loaded in the direction towards the cylinder housing (1).

5. Cylindrical lock according to one of the claims 1 to 4, characterized by the fact that the locking extensions (21) of the locking elements (6) and the groove sections (7) are arranged at a distance from the central plane (14) of the cylindrical core (2), in order to prevented, after a 180° turn of the cylindrical core, simultaneous insertion of the locking elements (6) into the groove sections (7).

6. Cylindrical lock according to one of claims 1 to 5, characterized by the fact that the central bolts (5) are guided in the hole (8) of the central bolts and that one spring hole (15) for receiving the spring is always parallel to the hole for the central bolt (16) of the central pin, whereby the receiving eye (17) of the central pin protrudes into the spring bore (15), and the spring (16) of the central pin runs into the receiving eye (17).

7. Cylindrical lock according to one of claims 1 to 6, characterized in that the central bolt (5) has a rectangular section.

8. Cylindrical lock according to one of claims 1 to 7, characterized in that each central bolt (5) has two releasing grooves (11), to which one pair of tactile plugs (12) of the locking element (6) belong.

9. Cylindrical lock according to claim 8, characterized in that more than two releasing grooves (11) are provided on one central bolt.

10. A flat key for a cylinder lock according to one or more of the preceding claims, characterized in that the key spring (22) is derived from two control curves (20, 20'), which are formed by a longitudinal central plane (13) on both sides, and that the flat the key has one central rib (19) on both sides, which extends over the length of the stem (18) of the key.

11. A flat key according to claim 10, characterized in that one control rib is provided on the flat side parallel to the central rib, the side of which facing the key blade always forms a second control curve.

12. The flat key according to claim 11, characterized in that, according to the choice, at least one control point, the first control curve is guided deeper than the second control curve, so that the control rib is trimmed.

13. Flat key according to one of claims 10 to 12, characterized in that the control rib is interrupted at one of the control points.

14. A flat key according to one of claims 10 to 13, characterized by the fact that it is designed as a double-sided key and that there are two first control curves on each blade of the key, and in the default case, one control rib with a second curve is provided on each flat side.