Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
  • F16B21/06—Releasable fastening devices with snap-action
  • F16B21/065—Releasable fastening devices with snap-action with an additional locking element
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B12/00—Jointing of furniture or the like, e.g. hidden from exterior
  • F16B12/10—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like
  • F16B12/12—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics
  • F16B12/26—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using snap-action elements

Definitions

• the invention relates to a locking device according to the preamble of claim 1 and to an associated release tool.
• the tool determined by the features of claim 14 can be used with particular advantage, which, with its flexible tool shank, makes it easy to insert the pressure piece required for loosening, which acts on the actual locking element, into an object recess, even when space is restricted in the region of the recess opening .
• FIG. 1 shows a half cross section of a first latching device according to section plane I-I in FIG. 2,
• FIG. 3 shows a partial top view of the coupling element of the latching device with the viewing direction according to FIG. 1, 4 shows a second locking device with a pin-shaped
• FIG. 5 shows a partial axial section of the locking device according to the sectional plane V-V in FIG. 4 and
• FIG. 6 shows a partial axial section offset at right angles with respect to FIG. 5 according to section plane VI-VI in FIG. 4, and
• Fig. 7 on a larger scale the end portion of an anchor element Ver with anchor part in a flat development.
• the latching device consisting of a connecting member VGl formed as a sheet metal stamped part and a plate-like coupling member KG1, also formed as a stamped part or also as a pressed part, is in a slot-shaped recess AS of e.g. wooden item G used.
• the coupling element KG1 as well as the connecting element VGL are symmetrical with respect to a longitudinal or coupling axis Z-Z, the coupling element KGl also with respect to a transverse axis V-V.
• the coupling member comprises d two head sections KO which are symmetrical with respect to the axis VV, of which the lower one, not shown, can optionally cooperate with a further connecting member VGl, not shown.
• the coupling member KGl which is not symmetrical with respect to the axis VV can also be considered , where instead of a second head section KO eg a conventional fastener occurs.
• the coupling member establishes the connection from the item G to an adjacent item, not shown.
• the connecting member VGl is designed as a closed frame and comprises the frame side parts RST and RSl.
• An anchoring element AE designed as a spiral spring arm is integrally formed on the former by bending it out of the frame tangential plane TE with the sheet metal frame, which has a laterally projecting, barb-shaped anchor section AT. The latter is pressed outwards into the deformable material of the object G when the head section KO of the coupling member KG1 is inserted into the recess AS, one of which adjoins the section AA fits anchoring recess AA as a positive abutment for the snap connection. This pressing is facilitated by the wedge-shaped design of the head section KO with pressing surfaces APF.
• the anchoring element AE can pivot slightly outwards under elastic bending deformation, because due to the bend from the frame tangential plane TE about the axis XX with its sheet metal plane it is perpendicular to the frame plane and is therefore bent transversely to its sheet metal plane. Even when the connecting member VGl is inserted into the recess AS, the anchoring element AE can be slightly deformed inward in this way, the outer oblique edge of the anchor section AT sliding along the outer edge of the slot and causing the elastic inward bending of the anchoring element AE by means of a wedge effect.
• the detent spring element RF When inserting the head section KO, the detent spring element RF, which is bent from the frame tangential plane TE and is also designed as a bending spring arm, engages with its free end behind the detent surface RAF on the head section and then transmits the holding forces of the latching connection closed in this way to the frame body of the connecting member VGL and further on the anchoring elements AE and the anchor sections AT on the object G.
• the shape and dimensioning of the detent spring elements RF which are subjected to pressure in their longitudinal direction, ie to compression, must be chosen sufficiently against buckling, which experience has shown to be no problem.
• a tool is used to release the snap-in connection according to FIG With an elastically flexible shaft WS and a pressure piece DRS formed on its end from the outside into the recesses ASP of the coupling element KGl in the direction of arrow P2, the relevant locking spring element RF being pressed out of its locking position in the direction of arrow P3 and the connection being released therewith.
• the coupling member can then be pulled out against the direction of insertion in the direction of the arrow P1 and detached from the object G.
• the release tool is expediently fork-shaped with mutually parallel shaft sections WS. Releasing the connection therefore requires only one movement.
• the frame body of a hollow cylindrical connecting member VG2 is formed by a sleeve jacket HM with recesses AN, the latter also delimiting the spiral spring-like elements AE and RF.
• the shape of these elements can essentially correspond to the flat shape according to FIG. 1 or 2. With a sufficiently small sheet thickness of the sleeve shell, there is nothing standing in the way of the elastic bending of the elements AE and RF, nor of the cylindrical bending of the sleeve shell, which can optionally be made by hand when inserted into a corresponding cylindrical object recess, but is expediently carried out mechanically in production .
• the coupling member KG2 is designed like a bolt with a partially conical head section KO to form pressing surfaces APF inclined to the axis ZZ.
• locking surfaces RAF are again formed in the form of an undercut for the engagement of the locking spring elements RF, while the pressing of the anchor parts AT at the ends of the anchoring elements AE into the material of the object G, with the aid of one anchoring recess AA each, when the coupling member is inserted Wedge action of the pressing surfaces APF takes place on the end sections of these elements projecting inward under elastic inward bending of the elements AE with the anchor parts AT.
• the elements AE and RF are integrally formed on the lower, annularly curved frame part RS2, specifically by shaping the recesses AN, which is not shown in detail, so that the bending spring arms of the elements AE and RF are held or clamped here.
• a sleeve-shaped release member EG is mounted in the arrow direction P4 on the middle shaft portion of the coupling member KG2.
• the link EG pushes the detent spring elements RF out of engagement with the detent surfaces RAF in the direction of the arrow P5.
• a simple, fork-shaped tool W can be used to advance the release member EG, which tool is inserted through cutouts LO in a rear flange of the coupling member KG2.
• Fig. 7 finally shows on a larger scale the anchor part AT at the free end of an anchoring element AE, which is designed as a spiral spring arm and consists of flat material, for example sheet metal.
• the end section of the anchoring element with anchoring part is shown here in a flat development, ie in the state after the stamped cut, but before the anchoring part is bent out of the sheet metal plane of the anchoring element.
• the bending then takes place around the bending axis UU, which is arranged at an acute angle to the arm length or coupling axis ZZ.
• the anchor part AT protrudes in the flat state over the outer side edge SK of the anchoring element AE.
• the acute-angled corner shape facilitates penetration into the material forming the abutment surface, ie the shape of the anchoring recess AA, by pushing the coupling member into the connecting member.
• the detent connection can also be released by means of suitable tools which are introduced through a hole or another suitable recess in the object to be connected to the detent element or an associated unlocking or releasing member.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
• Insertion Pins And Rivets (AREA)
• Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6208277

Family Applications (1)

Country Status (11)

Families Citing this family (1)

Family Cites Families (3)

• 1983
  • 1983-09-05 DE DE3331985A patent/DE3331985A1/de not_active Withdrawn
• 1984
  • 1984-09-04 ZA ZA846925A patent/ZA846925B/xx unknown
  • 1984-09-04 DD DD84266969A patent/DD227757A5/de not_active IP Right Cessation
  • 1984-09-05 WO PCT/EP1984/000269 patent/WO1985001089A1/de not_active Application Discontinuation
  • 1984-09-05 IT IT8423021U patent/IT8423021V0/it unknown
  • 1984-09-05 AU AU33974/84A patent/AU3397484A/en not_active Abandoned
  • 1984-09-05 ES ES1984292535U patent/ES292535Y/es not_active Expired
  • 1984-09-05 IT IT22535/84A patent/IT1176652B/it active
  • 1984-09-05 JP JP59503478A patent/JPS61500032A/ja active Pending
  • 1984-09-05 EP EP84903486A patent/EP0157816A1/de not_active Withdrawn
  • 1984-09-05 BR BR8407059A patent/BR8407059A/pt unknown
• 1985
  • 1985-06-28 AR AR85300864A patent/AR246788A1/es active
  • 1985-07-01 ES ES1985295933U patent/ES295933Y/es not_active Expired

Non-Patent Citations (1)

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