EP3863474A1

EP3863474A1 - Retraction device with spring energy accumulator which can be coupled

Info

Publication number: EP3863474A1
Application number: EP19812662.5A
Authority: EP
Inventors: Martin Zimmer; Günther Zimmer
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-10-14
Filing date: 2019-10-13
Publication date: 2021-08-18
Anticipated expiration: 2039-10-13
Also published as: WO2020078495A1; DE102018008202A1; US20210388656A1; EP3863474B1; US11566461B2

Abstract

The invention relates to a retraction device (10) comprising a housing (20) and a driving element (60), which is guided in the housing between a parked position (62) and an end position (61), wherein a first end (112) of a spring energy accumulator (111) is connected to the housing, and the spring energy accumulator is loaded to a maximum operating value when the driving element is in the parked position and is unloaded to a residual energy value when the driving element is in the end position. A second end (113) of the spring energy accumulator can either be fixed to the housing or can be coupled to the driving element by means of a bistable coupling (150). The coupling has a blocking element (140) which can be moved between the housing and the driving element. By virtue of the invention, a low-noise retraction device with a long service life is developed.

Description

Feeding device with spring energy storage that can be engaged

Description :

The invention relates to a retraction device with a Ge housing, with a driving element guided in the housing between a parking position and an end position, with a first end of a spring energy storage device being connected to the housing and with the spring energy storage element in the parking position at a maximum operating value when the driving element is in position charged and discharged to a residual energy value when the driving element is in the end position.

Such a drawing-in device is known from DE 10 2011 010 778 A1. Knocking noises can occur when the feed device is triggered. Damage to the components during operation can also limit the service life.

CONFIRMATION COPY The present invention is based on the problem of developing a low-noise feed device with a long service life.

This problem is solved with the features of the main claim. For this purpose, a second end of the spring energy storage device can either be fixed to the housing by means of a bistable coupling or can be coupled to the driving element. The coupling has a locking body which can be pushed between the housing and the driving element.

The feeder has a driving element that can be coupled with a spring energy storage system. To switch th the coupling between the two stable operating conditions, one between the housing and the driving element is moved to an ordered locking body. In the first case, the locking body couples the spring energy store to the housing. For this purpose, the housing has e.g. a trough that forms a claw of the clutch. A release of the clutch is prevented by means of the driving element which can be displaced relative to the housing.

When moving the driving element relative to the housing, the clutch is switchable. The driving element releases a movement of the locking body which, while relieving the spring energy storage device, penetrates into a coupling claw of the taking element, for example a transverse channel. After the clutch has been switched over, the locking body positively connects the spring energy store to the driving element. Loosening of the clutch is prevented by means of the housing. The driving element is, for example, in the end position adjacent partial stroke of its total stroke connected to the spring energy storage.

When using the pull-in device in a piece of furniture, coupling of the driver to the driving element can take place spatially and temporally offset for engaging the spring energy storage device to the driving element. The spring energy storage moves only linearly, so that noises from the spring are avoided.

The driving element can also actuate a cylinder-piston unit mounted in the housing. This is designed, for example, as a damper. The damper can be actuated before the spring energy accumulator is engaged. When the clutch is switched over, the speed of the driving element is thus already delayed. After coupling, the resultant of the deceleration force of the cylinder-piston unit and the acceleration force of the discharging spring energy store acts on the entrainment element.

The driving element can be formed in two parts. It then consists of a push pin part and a pull pin part, which are movable relative to each other. The push pin part and the pull pin part can be connected to one another in a swivel joint or in a push joint.

Further details of the invention emerge from the subclaims and the following description of schematically illustrated embodiments.

Figure 1: Isometric view of a feed device; Figure 2: retraction device with the housing shell removed in the end position; Figure 3: retraction device with the housing shell removed in the parking position;

Figure 4: Housing shell;

Figure 5: Detail of Figure 4;

Figure 6: thrust pin part;

Figure 7: bottom view of Figure 6;

Figure 8: pull pin part;

Figure 9: Pin slide;

Figure 10: Partial longitudinal section of the feeder with the

Driving element in the parking position;

FIG. 11: partial longitudinal section of the feed device when the driving element is in contact with the pin slide;

Figure 12: Partial longitudinal section of the feeder

Coupling the spring energy store with the driving element;

Figure 13: Partial longitudinal section of the feeder after

Coupling the spring energy store with the driving element;

Figure 14: Retraction device with modified cylinder-piston unit in the end position;

Figure 15: Feeder from Figure 1 ^L 4 in the

Parking position.

Figure 1 shows a feed device (10). Such a pulling devices (10) are used to control drawers, sliding doors, etc. in an open or closed end position. The retraction devices (10) shown in the exemplary embodiments are combined acceleration and deceleration devices (10). In a partial stroke of the drawer or the sliding door adjoining an end position, a resultant of an acceleration force of an acceleration device and a deceleration force of a deceleration device (11) acts on the relative movement of the Drawer or sliding door to a furniture body, etc. The pulling device (10) can also be designed without a delay device (11).

The feed device (10) has a housing (20) which, for example, consists of two housing shells (31, 51) joined together. In the exemplary embodiment, the two housing shells (31, 51) are screwed together. But they can also be riveted, glued, etc. The length of the housing (20) in the longitudinal direction (15) of the Einzugvorrich device (10) is 300 millimeters in the embodiment. The height of the housing (20) in the height direction (16) is for example a tenth of this length. The total width in the width direction (17) is a twentieth of the length in the exemplary embodiment.

On its upper side (21) the housing (20) has a longitudinal slot (22) oriented in the longitudinal direction (15) of the feed device (10). Through this longitudinal slot (22) projects in the interior (23) of the housing (20) Mitnahmele element (60) in the environment (1). The driving element (60) is in the housing (20) along bilateral guideways (32, 33) between the illustrated end position (61) and a parking position (62), cf. Figure 3 and movable back. The total stroke of the driving element (60) is e.g. one third of the length of the feed device (10).

Figure 2 shows the feed device (10), in which a housing shell (31; 51) is removed. The takeaway

element (60) is in the end position (61) as in the illustration in FIG. 1. In this end position (61) the driving element (60) is coupled to a spring assembly (110). In the exemplary embodiment, the spring assembly comprises a spring energy _S memory (111) which is suspended with a first end (112) in the housing (20) and with a second end (113) in a pin slide (121) of the spring assembly (110). It is also conceivable to design the spring assembly (110) without the pin slide (121). The spring energy store (111) is then connected, for example when the driver element (60) is in the end position (61), directly to the driver element (60). In the exemplary embodiment, the spring energy store (111) is designed as a tension spring (111). The housing-side spring holder tion (27) is arranged in the vicinity of the rear wall (24) of the housing (20). In the illustrated state, the tension spring (111) is stretched to a minimum operating length compared to its completely relaxed length. For example, it is loaded with a residual energy value.

Above the spring energy store (111) in the representations of Figures 2 and 3, e.g. a cylinder-piston unit (130) is arranged. In the exemplary embodiment, this is a hydraulic cylinder-piston unit (130). The cylinder-piston unit (130) can also be pneumatic. The cylinder-piston unit (130) has a cylinder (131) and a piston guided in the cylinder (131) by means of a piston rod (132). When the piston is retracted by means of the piston rod (132), operating medium is throttled from a displacement space arranged between the piston and the cylinder base (133) into a between the piston and the cylinder

head (134) lying compensation room. When the piston and piston rod (132) extend, the operating medium flows largely without resistance from the compensation chamber into the displacement chamber. The cylinder-piston unit (130) has a central axis (136) which penetrates the cylinder (131) and the piston rod (132) in the longitudinal direction (15). In the exemplary embodiment, both the cylinder (131) and the piston rod (132) are arranged coaxially to the central axis (136). In the representations of Figures 2 and 3, the piston rod (132) has a piston rod head (135) mounted in the driving element (60). It is also conceivable to form the piston rod head (135) with a stop surface for the Mitnahmele element (60). In this case, the driving element (60) can detach itself from the piston rod (132), for example in the case of a rapid movement from the end position (61) in the direction of the parking position (62). In such a variant, the cylinder-piston unit (130) has a return spring, for example a compression spring, which is arranged between the piston and the cylinder base (133). The feed device (10) can also be designed without a cylinder-piston unit (130).

The driving element (60) is formed in two parts in the embodiment shown. It consists of a push pin part (71) facing the pin slide (121) and a pull pin part (91) facing away from the pin slide (121). The train pin part (91) is, for example, in a plane normal to the longitudinal direction (15) of the feed device (10) relative to the push pin part (71) in the height direction (16). It is guided here on the thrust pin part (71). The push pin part (71) and the pull pin part (91) here form a push joint, the full prism of which is formed by the pull pin part (91) and the hollow prism of which is the push pin part (71). In the end position (61) shown in Figures 1 and 2, the pull pin part (91) is in an extended operating position (92). In the parking position (62) shown in FIG. 3, the pull pin part (91) is in a retracted standby position (93). It is also conceivable to move the Zugzap fteil (91), for example, in the transverse direction to the longitudinal direction (15) or to pivot in the longitudinal or transverse direction. Figures 4 and 5 show a housing shell (31; 51). For this purpose, the second housing shell (51; 31) is built in mirror image. The individual housing shell (31; 51) has leadership (25) and bearing (26). The length of the guide shell (31; 51) shown corresponds to the length of the feed device (10).

In the exemplary embodiment, the guide receptacles (25) are formed by four guide tracks (32, 33, 38, 41). A first guide track (32) is arranged horizontally. Their length is, for example, 36% of the length of the housing (20). In the exemplary embodiment, its depth in the width direction (17) is 0.8% of the length of the housing (20).

A second guideway (33) overlaps the first guideway (32) in some areas. In the height direction (16) it is one third higher than the first guideway (32). Its depth in the width direction (17) is one third of the depth of the first guideway (32) in this direction. The second guide track (33) is offset in the exemplary embodiment by 4% of the length of the housing (20) in the direction facing away from the rear wall (24) to the first guide track (32). Your rear wall (24) facing end can, however, also coincide with the corresponding end of the first guideway (32). The second guideway (33) has a horizontal section (34) oriented in the longitudinal direction (15), which is followed by a section (35) bent several times. The transition between the horizontal section (34) and the multiply curved section (35) is, for example, at the rear wall (24) facing away from the end of the first guideway (32). This water transition is tangential.

The multiply curved section (35) has a downwardly bent first region (36) and one in the exemplary embodiment second region (37) bent in the opposite direction, cf. Figure 2. The first area (36) covers, for example, an angle of 62 degrees. The angle swept by the second area (37) is, for example, 21 degrees. The first region (36) and the second region (37) merge into one another tangentially. The radius of the second area (37) in the embodiment is four times the radius of the first area. The first guideway (32) and the second guideway (33) can also be designed as a common guideway.

The third guideway (38) is located in the illustrations of FIGS. 4 and 5 below the first guideway (32) and the second guideway (33). The third guideway (38) is aligned parallel to the first guideway (32). In the exemplary embodiment, its length is 94% of the length of the first guideway (32). For example, it is arranged at least approximately symmetrically to a vertical central transverse plane of the first guideway (32). The center distance of the first guideway (32) and the third guideway (38) be, for example, 4.5% of the total stroke of the driving element (60). The depth of the third guideway (38) in the transverse direction (17) and its height in the vertical direction (16) correspond, for example, to the corresponding sizes of the first guideway (32).

The fourth guideway (41) is in the exemplary embodiment be flush with the lower limit of the third guideway (38). This fourth guideway (41) has a sliding, rolling or rolling section (46) merging into the third guideway (38) and a trough (42). The

Trough (42) is arranged below the right end in the illustrations of FIGS. 2-5 right end of the third guideway (38). It has a ramp section (43) oriented in the direction of the rear wall (24) and one facing away from the rear wall (24) Stop section (44). The height of the trough (42) in the height direction (16) is, for example, two thirds of the height of the third guideway (38). In the exemplary embodiment, the ramp section (43) forms an angle of 30 degrees with the longitudinal direction (15).

The bearing holder (26) comprises the spring holder (27) and a holder shell (47) for the cylinder (131). The Federhal tion (27) is arranged in the embodiment on the rear wall (24). It comprises a spring head receptacle (28) which is delimited by a spring retainer (29). In the area between the spring retainer (29) and the guide receptacles (25), the guide shell (31; 51) forms, for example, a spring guide (48).

Above the spring holder (27) is in the guide

shell (31; 51) designed as a cylinder inner wall on receiving shell (47). The length of the shot

shell (47) in the longitudinal direction (15) corresponds, for example, to half the length of the housing (20). The radius of the receiving shell (47) is 1.4% of the length of the housing (20) in the exemplary embodiment. The receiving shell (47) is connected to the surroundings (1) by means of an opening (49) lying coaxially to its center line.

FIGS. 6 and 7 show a thrust pin part (71) in two isometric views. Here, Figure 6 shows the thrust pin part (71) from the front and top, while the Fi gur 7 is a view from below and behind. The thrust pin part (71) has, for example, a longitudinally L-shaped thrust pin body (72), a first leg (73) being oriented in the longitudinal direction (15) and a second leg (81) vertically to the first leg (81) protrudes from this sem. The first leg (73) has one on each side

Push pin body (72) protruding guide pin (74). The individual guide pin (74) has a largely oval cross section, the long axis of which is oriented in the longitudinal direction (15). Instead of a single guide pin (74), a plurality of guide pins (74) can also be arranged on each side. These can have a circular, oval, elliptical, etc. cross-section.

In front of the guide pin (74), the first leg (73) has two opposite guide grooves (75). The two mutually parallel guide grooves (75) are e.g. aligned vertically. In the exemplary embodiment, they have a rectangular cross-sectional area. You constrict the first leg (73).

On its underside (76) the first leg (73) in the loading area of the guide pin (74) has a transverse channel (77). In the width direction (17), the transverse groove (77) has, for example, a constant cross section. The cross-sectional area is e.g. prism-shaped. It has two adjoining head surfaces (78) which are each connected to the underside (76) by means of a support surface (79). The length of the transverse groove (77) in the longitudinal direction (15) is, for example, 1.7% of the length of the housing (20). The height of the transverse channel (20) in the height direction (16), for example 0.7% of the length of the housing (20). The transverse channel (77) can also be designed differently. It can have a rectangular, cylindrical shell-shaped, etc. cross section. It can also have a vertically oriented opening that penetrates the first leg (73). Instead of a transverse channel (77), the underside (76) can e.g.

also have a spherical segment-shaped depression. The second leg (81) of the thrust pin part (71) has a piston rod head receptacle (82) in the exemplary embodiment. This includes, for example, a transverse bore (83) oriented in the width direction (17), to which a rod through (84) connects. The rod opening (84) has, for example, a semi-oval cross section and connects the piston rod head receptacle (82) to a rear side (86) of the thrust pin part (71). In a version of the cylinder-piston unit (130) with a return spring, or in a cylinder-piston unit whose cylinder (131) points towards the thrust pin part (71), the thrust pin part (71) can have no piston rod head receptacle (82) be educated.

The second leg (81) has a thrust surface (85) on the side facing away from the piston rod head receptacle (82). In the exemplary embodiment, this thrust surface (85) is a flat surface which, when the thrust pin part (71) is installed, is oriented normally to the longitudinal direction (15) of the feed device (10). The thrust surface (85) is also normal to the central axis (136) of the cylinder-piston unit (130).

The push pin part (71) has on its rear side (86) an actuation surface (64). This is e.g. trained normal to the longitudinal direction (15). The actuating surface (64) can also be curved in one or two axes. In the exemplary embodiment, the actuating surface (64) merges into an arc surface (65) in the underside (76). The push pin part (71) can also be designed without an actuating surface (64).

FIG. 8 shows a pull pin part (91). This is, for example, a U-shaped component. It has two vertically oriented sliding legs (94, 95), which are connected at their upper ends by means of a horizontal right-oriented connecting leg (96) are connected to one another. On the outer sides of the mutually parallel sliding legs (94, 95) a sliding pin (97) is arranged. The individual sliding pin (97) has an at least approximately elliptical cross-sectional area in the exemplary embodiment. The nestling circles of the respective ellipse are connected to each other by straight sections. The height of the sliding pegs (97) oriented in the height direction (16) is, for example, one third larger than their length oriented in the longitudinal direction (15).

The pull pin part (91) is constructed symmetrically to a vertical central longitudinal plane. The single slide leg (94;

95) has a rectangular cross section in a plane oriented normal to the height direction (16). The respective inner side (98) of the sliding leg (94, 95) and the end faces (99) located at the rear in the longitudinal direction (15) are flat and smooth, cf. Figure 11. The in the longitudinal direction

device (15) front front end (101) comprises two guide surfaces (102, 103) in the exemplary embodiment. A lower guide surface (102) is arranged parallel to the rear end face (99). An upper guide surface (103) is rela tive to the lower guide surface (102) by 2 degrees back ge. The connecting leg (96) is thus shorter in the longitudinal direction (15) than the sliding leg (94, 95). Both the lower guide surface (102) and the upper guide surface (103) are flat and have a smooth upper surface. The with the end faces (99) of the sliding legs (94,

95) lying in one plane end face (104) of the connecting leg (96) forms together with this a Zugflä

che (105). The traction surface (105) is ausgebil det as a flat surface. The pull pin part (91) can also be designed asymmetrically. For example, it can be designed with only one sliding leg (94; 95) and / or with only one sliding pin (97).

The driving element (60) can be formed in one piece. It then has, for example, two cylindrically ausgebil Dete guide pins on both sides, which each engage in a housing-side guide track (33). The thrust surface (85) and the Zugflä surface (105) then have a constant distance from each other. The cylinder-piston unit (130) can then be mounted in a swivel joint on the driving element (60). Instead of a transverse groove (77) on the underside, the one-piece Mitnahmele element has, for example, a laterally arranged recess. It is also conceivable to connect the push-pin part (71) and the pull-pin part (91) to one another by means of a film joint.

A pin slide (121) is shown in FIG. For example, it is L-shaped and has a long leg (122) and a short leg (125). The long leg (122) is oriented in the longitudinal direction (15). It has two external guide pins (123) on both long sides. These each have a circular cross-sectional area.

A vertical opening (124) is arranged centrally in the long leg (122), for example in the transverse direction (17). This vertical breakthrough (124) is, for example, truncated cone-shaped, with both truncated cones tapering to a horizontal central plane, cf. Figure 10. All cross-sectional areas of the vertical opening (124) are circular in the exemplary embodiment. The boundary surfaces of the vertical opening (124) can be continuous surfaces in the height direction (16). The vertical opening (124) can also rectangular, elliptical, oval, etc.

Have cross-section.

The short leg (125) protrudes in the representations of Figures 2 and 3 at the rear end of the pusher (121) from this. On its front, it has a slide-side actuating surface (126). This slide-side actuating surface (126) is e.g. flat and lies in a normal plane to the longitudinal direction (15). The slide-side actuation surface (126) can also be designed to be single-axis or biaxial. For example, it can be a convex surface. In the longitudinal direction (15), the distance from the center line of the vertical opening (124) to the slide-side actuating surface (126) corresponds, for example, to the spacing of the center line of the transverse channel (77) of the thrust pin part (71) to the actuating surface (64) of the thrust pin part (71). The spool slide (121) can also be designed without a spool slide actuating surface (126).

On the back of the spool (121) has a spring receptacle (127). This comprises a receiving chamber (128) which is delimited by means of two holding webs (129).

During assembly, for example, the pull pin part (91) is first pushed onto the push pin part (71). The sliding leg (94, 95) of the pull pin part (91) are used in the guide grooves (75) of the push pin part (71). The guide surfaces (102, 103) of the draw pin part (91) point in the direction facing away from the second leg (81). In the piston rod head receptacle (82) of the push pin

partly (71) the eg T-shaped piston rod head (135) of the cylinder-piston unit (130) is used. At closing the cylinder-piston unit (130) and that Driving element (60) in a housing shell (31; 51) is inserted. Here, the cylinder (131) is inserted into the receiving shell (47). A guide pin (74) of the push pin part (71) is inserted into the first guide track (32). A sliding pin (97) of the pull pin part (91) is inserted into the second guideway (33). After insertion, a straight line containing the central axis (136) of the cylinder-piston unit (130) penetrates the thrust surface (85) of the

Thrust pin part (71).

In the third guideway (38), the pin slide (121) is inserted, with a locking body (140) being inserted in the vertical opening (124). The locking body (140) is in the exemplary embodiment, a ball (140) which sits with little play in the vertical opening (124). In the example, its diameter is 10% larger than the distance of the horizontal sliding, rolling or rolling section (46) of the fourth guideway (41) to the first guideway (32). In the example shown, the diameter of the blocking body (140) is 83% of the distance between the trough bottom (45) and the first guideway (32). Instead of a ball, the blocking body (140) can be a transverse cylinder, an ellipsoid, a prism, etc. The pin slide (121) is inserted, for example, into the third guide track (38) in such a way that the blocking body (140) lies in the sliding, rolling or rolling section (46) of the fourth guide track (41) and in the transverse channel (77) of the driving element (60) protrudes.

The tension spring (111) is inserted into the spring receptacles (127) of the pusher slide (121) and into the spring holder (27) of the housing shell (31; 51). The housing (20) is then closed by fitting the second guide shell (51; 31). The two guide shells (31; 51) can now be joined as described above. Another order of assembly is also conceivable.

The feed device (10) can now be attached to a piece of furniture, e.g. a drawer or a sliding door. A driver (2) is then attached to the furniture body. After installation, the driving element (60) is e.g. when open

The drawer is pulled into the parking position (62) shown in FIG. 3.

In the parking position (62) of the pulling device (10) shown in FIG. 3, the pulling pin part (91) is in the multiply bent gate (35) of the second guideway (33). In this standby position (93) it is lowered relative to the push pin part (71) to such an extent that it protrudes only slightly from the housing (20). The push pin part (71) is in the first guideway (32). The driving element (60) can be non-positively and / or positively secured in the parking position (62).

The piston rod (132) of the cylinder-piston unit (130) is extended. The piston rod (132) loads the Mitnahmele element (60) in the direction of the parking position (62). The pin slider (121) is in a forward position. The Sperrkör by (140) is in the trough (42). For example, it rests on the underside (76) of the thrust pin part (71). The entrainment element (60) thus prevents the spool slide (121) from moving. The housing (20) in the spool (121) ver slidably guided locking body (140) and the Mitnahmele element (60) are parts of a clutch (150), which was in this position presented in a stable first Betriebszu (151) . This coupling (150) is a form-fit switchable mechanical coupling (150) in the form of a a claw coupling. The second end (113) of the spring energy store (111) is connected to the housing (20) by means of the coupling (150). The driving element (60) can be moved in the longitudinal direction (15) relative to this. The spring energy storage (111) is charged. The tension spring (111) is stretched to a maximum operating length.

When closing e.g. the drawer moves this relative to the fixed driver (2). In a partial stroke adjacent to the closed end position, e.g. of the drawer stroke, the driving element (60) with its push surface (85) meets the driver (2). In this case, the driving element (60) is loaded in the longitudinal direction (15) without a torque being effective. The force is transferred linearly to the cylinder-piston unit (130).

Figure 10 shows a partial longitudinal section of the Einzugvor direction (10) in contact with the driver (2). The driver mer (2) meets the thrust surface (85). In the Dar position of Figure 10, the lower edge of the driver (2) is below the middle line (136) containing the thrust surface (85) penetrating straight line. The impact force of the driver (2) is introduced into the cylinder-piston unit (130) without deflection.

The driving element (60) is in the park position (62). Together with the locking body (140), it blocks the pin slide (121) that holds the tensioned tension spring (111). The actuation supply surface (64) of the driving element (60) is spaced from the spool actuating surface (126). The Schubrich device (18) of the driving element (60) is oriented in this illustration to the left, that is to the rear. The clutch (150) is blocked in the first operating position (151). In the illustration in FIG. 11, for example, the drawer is retracted further. The housing (20) of the feed device (10) and the driver (2) are further displaced relative to one another. The driver (2) has moved the driving element (60) in the push direction (18). The driving element (60) is moved in the exemplary embodiment by one twentieth of the total stroke of the driving element (60) in the direction of thrust (18). For example, the piston rod (132) of the cylinder-piston unit (130) is retracted by the stroke of the driving element (60). In the cylinder (131), the piston displaces, for example, oil from the displacement chamber into the compensation chamber. The movements of the driving element (60) and, for example, the drawer are delayed. The drawer is braked.

The pull pin part (91) of the driving element (60) is guided on the push pin part (71) and along the second guide tracks (33) move upward. Here, the horizontal section (34) of the second guideway (33) prevents renewed lowering of the draw pin part (91). The pull pin part (91) is in the extended operating position (92). The driver mer (2) now sits in a driving recess (63) delimited by the thrust pin part (71) and the pull pin part (91). In the event of a possible rebound, the pull pin (91) prevents the driver (2) from extending again.

The driving element (60) now rests with its actuating surface (64) on the pusher slide actuating surface (126). In this non-static state, the transverse channel (77) stands above the vertical opening (124) and the blocking body (140). The locking body (140) is still in the trough (42). The Fede energy storage (111) is still connected to the housing (20). Securing the clutch (150) by means of the taking element (60) is however canceled. The Mitnahmele element (60) has initiated a switching of the clutch (150). Figure 12 shows the retraction device (10) when the drawer is pushed in further or after the drawer is released.When pushed in further, the driving element (60) pushes both the piston rod (132) and the pusher slide (121) further into the Thrust direction (18). The driving element (60) is further delayed. At the same time, the relaxing tension spring (111) pulls the pusher slide (121) with the blocking body (140) further in the pushing direction (18). The blocking body (140) is pulled out of the trough (42) along the ramp section (43). At the same time, the locking body (140) engages in the transverse channel (77) of the thrust pin part (71). It thus blocks a relative movement between the entraining element (60) and the second end (113) of the spring energy store (111). The driving element (60) is now coupled to the spring energy storage (111). The second end of the tension spring (111) is only moved in the longitudinal direction (15). In this compared to the coupling of the driver (2) with the Mitnahmele element (60) delayed release of the tension spring (111) no noise. The driving element (60) is thus connected to the spring energy store (111) in a partial stroke of its total stroke.

For example, should the drawer come to a standstill and be released, for example, in the position shown in FIG. 11, the relaxing tension spring (111) pulls the pin slide (121) in the direction of thrust (18). In this case, too, the blocking body (140) couples the driving element (60) to the spring energy store (111). The piston rod (132) is also retracted further in this case, the cylinder-piston unit (130) having little or no deceleration effect due to the low speed. If the pusher slide (121) is designed without the short leg (125), the tension spring (111) that relaxes pulls along the ramp section (43) in the direction of thrust (18). The locking body (140) is displaced in such an embodiment form in the transverse channel (77).

In Figure 13, the feed device (10) and the driver (2) are in a further retracted state e.g. the drawer. The clutch (150) is now completely switched into a second stable operating state (152). The second end (113) of the spring energy store (111) is connected to the driving element (60). The locking body (140) mounted in the pin slide (121) sits e.g. form-fitting in the cross channel (77). The driving element (60), the Ge housing (20) and the locking body (140) are also parts of the coupling (150) in this position. This part of the coupling (150) is designed as a switchable claw coupling. The locking body (140) is after switching on the Mitnahmele element (60). The sliding, rolling or rolling section (46) of the fourth guideway (41) prevents the coupling (150) from loosening.

The locking body (140) slides, rolls or rolls along the sliding, rolling or rolling section (46) of the fourth guide track (41). The driving element (60) is claimed by the resultant force of the acceleration force of the further discharged NEN energy storage device (111) and the deceleration force of the cylinder-piston unit (130). The Mitnahmele element (60) moves in the direction of the end position (61). For example, the drawer is moved into the closed end position with decreasing speed. It stops there without a stop. In Figure 2, the feed device (10) in the end position (61) of the driving element (60) is shown. The driving element (60) is in the rear position. The pistons

rod (132) of the cylinder-piston unit (130) is retracted. The spring energy store (111) is discharged to a residual energy value. The spring energy store (111) is still coupled to the driving element (60).

Opening e.g. the drawer is in the opposite direction. When the drawer is extended, the driver (2) loads the pull pin part (91) of the driving element (60) in the pulling direction (19). He lies here on the traction surface (105) of the Zugzap fsteils (91). The driving element (60) takes the spool (121) and the second via the coupling (150)

End (113) of the spring energy storage (111) with. The clutch (150) is in the second stable Betriebszu stand (152) in which the tension spring (111) with the Mitnahmele element (60) is connected. The tension spring (111) is tensioned. The piston rod (132) of the cylinder-piston unit (130) is extended either by means of the driving element (60) or by means of a return spring.

The driving element (60) moves the blocking body (140) further in the pulling direction (19). As soon as, depending on the path of the entrainment element (60), the blocking body (140) descends

cut (43) reaches, slides, rolls or rolls the blocking element (140) along the ramp section (43) into the trough (42), cf. Figure 12. The driver element (60) has passed through the partial stroke adjoining the end position (61), in which it is connected to the spring energy store (111). The dome

lung (150) is switched. The connection of the Mitnahmele element (60) with the spool (121) is released. The second end (113) of the spring energy store (111) with the fenschieber (121) is coupled to the housing (20), cf. Fi gur 11. A release of the clutch (150) is blocked by the driving element (60) moving further in the pulling direction (19). The second end (113) of the spring energy store (111) is thus fixed to the housing (20).

When the parking position (62) of the driving element (60) is reached, the pull-pin part (91) moves downward relative to the push-pin part (71). The driver (2) is released. For example, the drawer can now be opened more easily and largely without resistance.

When using a one-piece driving element (60), for example, the housing (20) has a trough (42) arranged laterally in a guide shell (31; 51). The Federerenergiespei cher (111) is also in this case by means of a Sperrkör pers (140) alternatively with the housing (20) or with the taking element (60) can be coupled.

Figures 14 and 15 show another Einzugvorrich device (10). In the illustration in FIG. 14, the entrainment element (60) is in the end position (61). FIG. 15 shows this pull-in device (10) with the driving element (60) in the parking position (62). The structure and function of the feeder device (10) shown in these figures largely corresponds to the structure and function of the feeder device (10) described in connection with the embodiment shown in Figures 1-13.

In the exemplary embodiment of FIGS. 14 and 15, the cylinder-piston unit (130) is arranged in the housing (20) in such a way that the piston rod (132) is fixed to the rear wall (24) or can be placed against the rear wall (24). The cylinder (131) is in the longitudinal direction (15) of the feed device (10) axially slidable ver. If necessary, the guidance of the thrust pin part (71) in the housing (20) can be eliminated in this exemplary embodiment.

When the drawer is closed, any transverse forces that may occur on the piston rod (132) are further reduced. This prevents leaks in the cylinder-piston unit (130) even with many load cycles.

Combinations of the individual exemplary embodiments are also conceivable.

Reference character list:

1 environment

2 drivers

10 feeder, combined acceleration and

Delay device

11 delay device

15 longitudinal direction

16 height direction

17 width direction, cross direction

18 direction of thrust

19 direction of pull

20 housing

21 top of (20)

22 longitudinal slot

23 interior of (20)

24 rear wall

25 leadership shots

26 warehouse recordings

27 spring holder; Feather mount

28 spring head receptacles

29 spring retainer

31 housing shell, guide shell

32 guideway, first guideway

33 guideway, second guideway

34 horizontal section

35 multiply curved section

36 first range of (35)

37 second range from (35)

38 guideway, third guideway 41 guideway, fourth guideway

42 trough

43 ramp section

44 stop section

45 trough bottom

4 6 Sliding, rolling or rolling section

47 receiving tray

48 Leadership

4 9 breakthrough

51 housing shell, housing shell

60 driving element

61 end position

62 parking position

63 Take-out recess

64 operating area

65 arches

71 thrust pin part

72 pusher body

73 first leg

74 guide pins

75 guide grooves

7 6 bottom

77 cross channel, claw

78 head areas

7 9 support surface

81 second leg

82 piston rod head receptacles

83 cross hole

84 pole breakthrough 85 thrust area

86 back of (71)

91 pull pin part

92 extended operating position

93 retracted standby position

94 sliding legs

95 sliding legs

96 connecting legs

97 sliding pin

98 inside

99 end faces

101 end face

102 lower guide surface

103 upper guide surface

104 end face of (96)

105 traction area

110 spring assembly

111 spring energy storage, tension spring

112 first end of (111)

113 second end of (111)

121 spool

122 long leg of (121)

123 guide pins

124 vertical breakthrough

125 short legs

126 actuating surface on the slide side,

Spigot operating surface

127 spring mount

128 intake chambers

129 footbridges 130 cylinder-piston unit

131 cylinders

132 piston rod

133 cylinder bottom

134 cylinder head

135 piston rod head

136 central axis 140 locking body, ball

150 clutch

151 first stable operating state

152 second stable operating state

Claims

Claims:

1. retraction device (10) with a housing (20), with a driving element (60) guided in the housing (20) between a parking position (62) and an end position (61), a first end (112) of a spring energy store (111) is connected to the housing (20) and wherein the spring energy storage (111) is loaded to a maximum operating value when the driving element (60) is in the parking position (62) and when the driving element (60) is in the end position (61) a residual energy value is discharged, characterized in that

- That a second end (113) of the spring energy storage (111) by means of a bistable coupling (150) either on the Ge housing (20) can be fixed or can be coupled with the driving element (60) and

- That the coupling (150) has a locking body (140) which can be displaced between the housing (20) and the driving element (60).

2. retraction device (10) according to claim 1, characterized in that the clutch (150) is an externally actuated switchable claw clutch, the actuating element of the driving element (60).

3. Feeding device (10) according to claim 2, characterized in that the clutch (150) by means of the Mitnahmele element (60) can be reversed depending on the path.

4. retraction device (10) according to claim 1, characterized in that the housing (20) and the driving element (60) in both stable operating states (151, 152) of the hitch be (150) limit a clutch stroke of the locking body (140) zen .

5. Feeding device (10) according to claim 1, characterized in that the second end (113) of the Federenergiespei chers (111) is held in a locking member (140) encompassing pin slide (121).

6. Feeder device (10) according to claim 1, characterized in that when the driving element (60) is in the position

Parking position (62), the second end (113) of the spring energy store (111) is coupled to the housing (20) and that when the driving element (60) is in the end position (61), the second end (113) of the spring energy store (111) is coupled to the driving element (60).

7. Feeding device according to claim 1, characterized in that the driving element (60) has a thrust pin part (71) and a movable relative to this, on the thrust pin part (71) mounted pull pin part (91).

8. retraction device (10) according to claim 7, characterized in that the pull pin part (91) by means of a Ge in the housing (20) arranged guideway (33) on the push pin part (71) in a plane normal to a longitudinal direction (15) Feed device (10) is displaceable.

9. Feeding device (10) according to claim 1, characterized in that it has a coupled with the driving element (60) or coupled, in the housing (20) mounted cylinder-piston unit (130).

10. Retraction device (10) according to claim 9, characterized in that a straight line containing a central axis (136) of the cylinder-piston unit (130) normally penetrates a thrust surface (85) of the thrust pin part (71).