EP2093355A1 - Clé avec une tige améliorée - Google Patents

Clé avec une tige améliorée Download PDF

Info

Publication number
EP2093355A1
EP2093355A1 EP20090152509 EP09152509A EP2093355A1 EP 2093355 A1 EP2093355 A1 EP 2093355A1 EP 20090152509 EP20090152509 EP 20090152509 EP 09152509 A EP09152509 A EP 09152509A EP 2093355 A1 EP2093355 A1 EP 2093355A1
Authority
EP
European Patent Office
Prior art keywords
key
shank
sheath
tumbler
bit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20090152509
Other languages
German (de)
English (en)
Other versions
EP2093355B1 (fr
Inventor
Lars Lundberg
Hans-Rainer Speckamp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dorma Deutschland GmbH
Original Assignee
Dorma Deutschland GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dorma Deutschland GmbH filed Critical Dorma Deutschland GmbH
Publication of EP2093355A1 publication Critical patent/EP2093355A1/fr
Application granted granted Critical
Publication of EP2093355B1 publication Critical patent/EP2093355B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B19/00Keys; Accessories therefor
    • E05B19/26Use of special materials for keys

Definitions

  • the present invention relates to a key for the closure of a lock, in particular a tumbler lock.
  • the key is embodied as a tumbler key, comprising a key body having a key shank extending along a shank axis and having a reide at a first end of the key shank and a key bit at or near the second end of the key shank.
  • a tumbler corresponds to a very simple embodiment of a key, which usually has a cylindrical shank, which may be referred to as a key shank or as a key axis.
  • These types of keys are assigned to so-called tumbler locks, which have no cylinder that can be rotated within a cylinder housing.
  • the tumbler has a hole into which the key must be inserted, with rotational movement between the key shank and a guide structure within the tumbler lock.
  • the key body has a key shank extending along a shank axis, the key shank terminating in a recess at the first end and having at least one key bit at the opposite end of the recess of the key shank.
  • the key bit may be located at the end of the key shaft or at least near the end along the shaft axis.
  • the key shank has a round cross-section to allow for rotational movement when the key is inserted in the tumbler lock.
  • the key bit has a leaf-like shape, which may have a special structure for the closure to the assignment to a reach corresponding lock, the Reide also has a flat shape. Both the key bit and the reide are integral with the key shank, the key body comprising the key shank, the reide and the key bit, and is usually made of a steel material.
  • tumbler key Due to the flat design of the key bit and the Reide on the one hand and the circular cross-sectional shape of the key shank on the other hand, the production of such a tumbler key is very expensive. Usually, the key body must be made by a casting process or by a forging process. In conjunction with both methods, at least one further production step is necessary. The additional manufacturing step may involve a machining process such as milling or at least additional calibration by a punching operation. Another disadvantage is the weight of such a tumbler key having a body with a completely steel cross-sectional area of the key shank. Therefore, tumbler keys can be made with a hollow shaped key shank, with such shank shapes requiring at least one further manufacturing step.
  • the perception of quality by the customer such tumbler keys is disadvantageously not very high.
  • the cylinder housings of the tumbler locks are made of a steel material, resulting in a metal-to-metal pairing when the tumbler key is inserted into the cylinder housing. This leads to unwanted noise and can also lead to a jamming.
  • the invention discloses that the key shank is enclosed in a sheath that extends concentrically around the shank axis along the entire length from the first end to the second end of the key shank.
  • a sheath extending around the key shank solves the above problem of making a tumbler key.
  • the sheath encloses the key shank, the sheath being formed along the entire length of the key shank.
  • the tumbler key comprises a leaflike reid and a leaflike key bit, the key shank having a circular cross-sectional area.
  • the tumbler key has various cross-sectional shapes, the manufacture of the key can be accomplished in very simple steps.
  • the key body may be provided by a simple flat metal part having a constant thickness with respect to the key shaft, the key bit and the reide. Only when the sheath is mounted to surround the key shank, the key shank receives a circular cross-section.
  • the sheath extends along the entire length of the key shank from the first to the second end, since thus a metal-metal pairing can be avoided when the tumbler key is inserted into the lock. Therefore, the sheath does not have any metallic material.
  • the casing is produced by an injection molding process, wherein the injection molding process is designed as a casting process.
  • Injection molding is also referred to as molding, which means a molding process in an injection mold.
  • the sheath may consist of an injection-moldable material which is sprayed onto the key shank.
  • the key shank In order to enable a casting process, in a first step, the key shank must be inserted into the injection mold in order to inject the material of the sheathing in a subsequent step.
  • This technique results in a component having a combination of materials, especially when the injection molded material of the sheath has a positive fit with the key body.
  • the injection molding process is an inexpensive manufacturing technique compared to metal forming processes such as forging. Therefore, the tumbler key according to the present invention can be manufactured by cost-minimized steps, whereby the consumer can obtain the perception of high quality.
  • the key bit extends out of the sheath.
  • the sheath completely encloses the key shank, resulting in passage of the key bit through the shroud at or near the second end of the key shank which is inserted into the lock. Therefore, the key bit has no shroud, since the key bit must interact with the locking mechanism of the tumbler.
  • the mold for casting the sheath onto the key shank is sealed in the transition area between the key shank and the reide to avoid the application of the material of the sheath on the surface of the key bit. In the same way, the Reide the tumbler key is sealed against the material of the sheath, while the key body within the mold is inserted and the material of the jacket is injected into the cavity.
  • the key body has a transition region between the key shank and the reide, with the sheath extending to the transition region.
  • the transitional area is at the end of the key shaft, where the key shaft merges into the reide of the key.
  • the mold seals the reide to prevent the formation of cladding material on the surface of the reide. It should be noted, however, that the key bit and / or the Reide of the key body can also be enclosed with a sheath, as the sheath of the key shank.
  • the Reide can be enclosed by a sheath, wherein the sheath can be the same sheath as the sheath of the key shank, or the Reide is sheathed with a sheath material, which has, for example, a different kind or a different color of the material.
  • the key body comprises a sheet metal material such as bronze material, nickel silver material or steel material, wherein the key body is produced by a metal cutting method such as a punching method.
  • a metal cutting method such as a punching method.
  • Metal stamping methods are known as low cost mass production methods wherein the key body comprising the key shaft, the reide and the key bit, can be stamped in one stroke. Consequently, the key body can be manufactured in a very inexpensive manner, wherein the shell, which is provided by an injection molding process, represents a way of completing the tumbler key. Sharp edges, which can arise through the shear cutting process are covered by the sheath. Therefore, the combination of an inexpensive metal cutting method and a low-cost injection molding method leads to an advantageous production of a tumbler key, which gives the impression of a high quality.
  • the sheath is formed as a plastic sheath or as a rubber sheath, wherein the plastic sheath comprises a plastic material such as polyamide (PA), polyoxymethylene (POM) or polypropylene (PP).
  • PA polyamide
  • POM polyoxymethylene
  • PP polypropylene
  • the present invention is not limited to these materials of the sheath, since other materials are suitable for injection molding.
  • the key shank has a pivotal guide structure that results in a pivotal guiding effect when the key is rotated within the Buntbartsches.
  • the key When the key is inserted into the tumbler, the key must be a keyed bearing.
  • the key must be rotatable in the housing of the lock, with high accuracies are required to ensure accurate interaction between the key bit and the lock mechanism.
  • the accuracies are in the range of a few tenths of a millimeter. Consequently, a rotary guide structure is necessary because a simple guide between the casing and the cylinder housing is not sufficient to achieve the required accuracies.
  • the rotary guide structure may be embodied as a ring structure coaxially extending around the shaft axis, the ring being located near the key bit. The closer the ring is located to the key bit, the higher the accuracy that can be achieved.
  • the annular rotary guide structure extends like a solid ring around the key shaft and consists of the material of the sheath. Consequently, the annular rotary guide structure is realized by the geometry of the injection mold. According to a further embodiment, more than one rotary guide structure may be formed in the key shank to improve the accuracy of the rotational movement of the tumbler key within the housing of the tumbler lock.
  • the rotary guide structure has two projections which are arranged in the sheet metal material of the key shank in opposite position.
  • the projections correspond to a type of lugs or protuberances formed by a corresponding shear cut die when the key body is produced by a punching stroke.
  • the projections penetrate out of the plastic jacket to allow metal-to-metal mating to form the pivotal guide.
  • the projections form a kind of bearing in an annular receptacle within the housing of the lock.
  • the sheet thickness of the key body is 1 mm to 5 mm, preferably 2 mm to 4 mm and particularly preferably 3 mm.
  • the thickness of the key body corresponds to the thickness of the sheet material or the strip material used to punch out the key body.
  • the sheet material from which the key shank is formed has transverse bores extending perpendicular to the shank axis. Through this cross holes a positive connection of the sheath with the key shank is made possible, wherein the material passes through the injection molding process in the transverse bores. The transverse bores avoid loosening of the shroud since the shroud material penetrates through the transverse bores and the shroud can not be lost.
  • the key body has a roughened surface in order to improve the adhesion between the key body and the sheath.
  • the roughened surface may be made by an embossing process, a sandblasting process or, for example, a rolling process.
  • the cross section of the sheath can be designed as a circular cross section and have a diameter of 3 mm to 7 mm, preferably from 4 mm to 6 mm and particularly preferably 5 mm.
  • the diameter of the sheath is greater than the width of the key shank to allow a circular cross-section of the sheath.
  • FIG. 1 shows a preferred embodiment of the key 1 according to the present invention.
  • the key 1 has a key shank 2, which extends along a key axis 3.
  • the key shank 2 is made of a sheet metal material by a metal cutting method such as a punching method.
  • a Reide 4 is formed, through which the key 1 can be gripped.
  • a key bit 5 is formed to cooperate with the locking mechanism within the housing of the tumbler.
  • the key bit 5 is exemplified, and may be formed with a specific shape.
  • the key shank 2 is enclosed by a sheath 6 which extends concentrically with the key axis 3 along the entire length of the key shank 2 from the first end to the second end.
  • the sheath 6 extends to a transition region 7 between the key shank 2 and the reide 4.
  • the sheath 6 does not extend over the entire key bit 5, so that the key bit 5 protrudes from the sheath 6.
  • the sheath 6 is designed as a rubber or plastic sheath, wherein the synthetic material may comprise a plastic material such as polyamide (PA), polyoxymethylene (POM) or polypropylene (PP).
  • PA polyamide
  • POM polyoxymethylene
  • PP polypropylene
  • the material of the key body may consist of a bronze material, a nickel silver material or a steel material.
  • transverse bores 9 are punched into the key shank 2.
  • the transverse bores 9 extend along a bore axis, which is arranged perpendicular to the shaft axis 3. According to the present invention, the transverse bores 9 are punched into the key body with five holes provided.
  • FIG. 2 shows a further embodiment of the key 1 according to the FIG. 1 in a perspective view.
  • This embodiment shows a key body with a key shank 2, a Reide 4 and a key bit 5, which consists of a single sheet metal material with a certain thickness. The thickness of the material is constant over the entire key body, so that the key body in the region of the key shank 2 has a rectangular cross-section.
  • the key body in the region of the key shank 2 has a circular cross-section which is composed of the key shank 2 and the sheath 6.
  • Adjacent to the key bit 5, a rotary guide structure 8 is introduced into the casing 6, which is formed concentrically around the shaft axis 3.
  • the rotary guide structure 8 is designed as a ring and improves the accuracy of the rotational movement of the key 1 within the housing of the castle.
  • the perspective view of the key 1 makes it clear that the transverse bores 9 extend through the entire thickness of the sheet metal material which forms the key shaft 2. When the material of the sheath 6 is injection-molded, the material penetrates into the transverse bores 9 and forms a positive connection between the sheath 6 and the key shank 2.
  • FIG. 3 shows a further embodiment of the key 1 with a changed rotary guide structure.
  • the rotary guide structure is through Formed protrusions which are formed in the sheet metal material of the key shank 2 in opposite positions. Consequently, the key body of the key 1 has a key shank 2 which extends along the key axis 3, two projections 10 being formed near the reide 4 and the key bit 5 and forming an additional molding of the key body, which is produced by a metal cutting method such as a die punching method. is made.
  • the transverse bores 9 are introduced into the sheet material. These features can be made in one stroke or in multiple strokes punched by successive steps.
  • the present invention is not limited to the embodiment described above, which is merely an example and may be modified in various ways within the scope indicated by the subclaims. Therefore, the present invention is also applicable to keys 1 comprising a shell 6 which extends over the entire key body with the reide 4 and the key bit 5 or which has interruptions along the shaft axis 3.

Landscapes

  • Lock And Its Accessories (AREA)
  • Supports Or Holders For Household Use (AREA)
EP09152509.7A 2008-02-20 2009-02-11 Clé avec une tige améliorée Not-in-force EP2093355B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810010164 DE102008010164A1 (de) 2008-02-20 2008-02-20 Schlüssel mit einem verbesserten Schlüsselschaft

Publications (2)

Publication Number Publication Date
EP2093355A1 true EP2093355A1 (fr) 2009-08-26
EP2093355B1 EP2093355B1 (fr) 2016-02-10

Family

ID=40659789

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09152509.7A Not-in-force EP2093355B1 (fr) 2008-02-20 2009-02-11 Clé avec une tige améliorée

Country Status (3)

Country Link
EP (1) EP2093355B1 (fr)
CN (1) CN101514598B (fr)
DE (1) DE102008010164A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202015100441U1 (de) * 2015-01-30 2016-05-03 Schulte-Schlagbaum Aktiengesellschaft Buntbartschlüssel mit im Querschnitt kreuzförmigem Schaft

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1031677B (de) * 1953-04-22 1958-06-04 Heinz Roesinger Schluessel fuer Tuerschloesser od. dgl.
GB854868A (en) 1958-09-30 1960-11-23 Yale & Towne Mfg Co Keys for locks
DE2037071A1 (de) 1970-07-27 1972-02-03 Strohschnitter & Co, 2000 Hamburg Schlüssel
AT371532B (de) * 1978-12-15 1983-07-11 Grundmann Gmbh Geb Flachschluessel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1113318A (ja) * 1997-06-20 1999-01-19 Alpha Corp キープレート及びその製造方法
CN2709588Y (zh) * 2003-02-28 2005-07-13 程耀永 隐蔽钥匙孔防盗锁
CN2635832Y (zh) * 2003-08-11 2004-08-25 曾军 易识别钥匙
CN2856296Y (zh) * 2006-01-11 2007-01-10 刘振胜 钥匙

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1031677B (de) * 1953-04-22 1958-06-04 Heinz Roesinger Schluessel fuer Tuerschloesser od. dgl.
GB854868A (en) 1958-09-30 1960-11-23 Yale & Towne Mfg Co Keys for locks
DE2037071A1 (de) 1970-07-27 1972-02-03 Strohschnitter & Co, 2000 Hamburg Schlüssel
AT371532B (de) * 1978-12-15 1983-07-11 Grundmann Gmbh Geb Flachschluessel

Also Published As

Publication number Publication date
CN101514598B (zh) 2012-07-11
CN101514598A (zh) 2009-08-26
DE102008010164A1 (de) 2009-08-27
EP2093355B1 (fr) 2016-02-10

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