Fastening Device Having a Base Part and a Blocking Part

Abstract

A fastening device includes a base part and a fastening assembly, which can be fitted to each other along a fitting direction, and at least one latching element which is arranged on the base part or the fastening assembly. The base part and the fastening assembly in a fitted position are positively connected to each other via the at least one latching element. There is additionally provided a blocking part which in the fitted position of the base part and the fastening assembly can be connected to the base part, where at least one of the base part and/or the fastening assembly includes a first magnetic element and the blocking part includes a second magnetic element, which cooperate with each other in a magnetically attracting manner when the base part and the blocking part are connected to each other, where the blocking part includes a fixing element.

Claims

1. A fastening device, comprising: a base part and a fastening assembly, which can be fitted to each other along a fitting direction, and at least one latching element which is arranged on the base part or the fastening assembly, wherein the base part and the fastening assembly in a fitted position are positively connected to each other via the at least one latching element, wherein a blocking part which in the fitted position of the base part and the fastening assembly can be connected to the base part, wherein at least one of the base part and the fastening assembly includes a first magnetic element and the blocking part includes a second magnetic element, which cooperate with each other in a magnetically attracting manner when the base part and the blocking part are connected to each other, wherein the blocking part includes a fixing element which is configured to cooperate with the at least one latching element in order to block the positive connection between the base part and the fastening assembly.

2. The fastening device according to claim 1, wherein the base part includes a body and an engaging portion with an engagement opening, which protrudes from the body, and the blocking part includes an engaging element for engaging into the engagement opening of the base part.

3. The fastening device according to claim 1, wherein at least one of the base part includes a first thread means and the blocking part includes a second thread means, wherein the blocking part is screwingly connectable to the base part.

4. The fastening device according to claim 1, wherein the fastening assembly includes a fastening opening into which the at least one latching element engages in the fitted position.

5. The fastening device according to claim 4, wherein in the fitted position the at least one latching element is positively connected to an edge portion of the fastening assembly, which at least sectionally delimits the fastening opening.

6. The fastening device according to claim 4, wherein in the fitted position the at least one latching element is positively connected to an edge portion of the fastening assembly, which at least sectionally delimits the fastening opening.

7. The fastening device according to claim 4, wherein in the fitted position the at least one latching element is positively connected to an edge portion of the fastening assembly, which at least sectionally delimits the fastening opening.

8. The fastening device according to claim 7, wherein the fixing element is arranged between the latching elements when the blocking part is connected to the base part.

9. The fastening device according to claim 1, wherein when the base part and the fastening assembly are fitted to each other, the at least one latching element is elastically deflectable and in the fitted position includes a form-fit element for producing the positive connection.

10. The fastening device according to claim 9, wherein the fixing element is configured to act on a side of the at least one latching element that faces away from the form-fit element.

11. The fastening device according to claim 1, wherein the base part or the fastening assembly includes a first form-fit device and the blocking part includes a second form-fit device to inhibit a rotation of the blocking part with respect to the base part around the fitting direction.

12. The fastening device according to claim 1, wherein the blocking part has a body from which the fixing element protrudes.

13. The fastening device according to claim 12, wherein the fixing element circumferentially extends around the fitting direction, in particularly annularly, at the body.

14. A fastening device, comprising: a base part and a fastening assembly, wherein the base part and the fastening assembly can be fitted to each other and in a fitted position are connected to each other via a screw element, wherein the base part includes a first magnetic element and the screw element includes a second magnetic element, which cooperate in a magnetically attracting manner.

15. A two-wheeler comprising a fastening device according to claim 1.

16. The fastening device according to claim 2, wherein at least one of the base part includes a first thread means and the blocking part includes a second thread means, wherein the blocking part is screwingly connectable to the base part.

17. The fastening device according to claim 2, wherein the fastening assembly includes a fastening opening into which the at least one latching element engages in the fitted position.

18. The fastening device according to claim 3, wherein the fastening assembly includes a fastening opening into which the at least one latching element engages in the fitted position.

19. The fastening device according to claim 6, wherein in the fitted position the at least one latching element is positively connected to an edge portion of the fastening assembly, which at least sectionally delimits the fastening opening.

20. The fastening device according to claim 2, wherein when the base part and the fastening assembly are fitted to each other, the at least one latching element is elastically deflectable and in the fitted position includes a form-fit element for producing the positive connection.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The idea underlying the solution will be explained in detail below with reference to the exemplary embodiments illustrated in the Figures. It is shown in:

[0046] FIG. 1A a view of a first exemplary embodiment of a fastening device;

[0047] FIG. 1B a sectional view along line A-A of FIG. 1A;

[0048] FIG. 2A a view of the fastening device when a base part and a fastening assembly of the fastening device are fitted to each other;

[0049] FIG. 2B a sectional view of the arrangement of FIG. 2A;

[0050] FIG. 3A a view of the fastening device on further fitting of the base part and the fastening assembly of the fastening device to each other;

[0051] FIG. 3B a sectional view of the arrangement of FIG. 3A;

[0052] FIG. 4A a view of the fastening device in a fitted position of the base part and the fastening assembly;

[0053] FIG. 4B a sectional view of the arrangement of FIG. 4A;

[0054] FIG. 5A a view of the fastening device when the blocking part is connected to the base part;

[0055] FIG. 5B a sectional view of the arrangement of FIG. 5A;

[0056] FIG. 6 a view of the fastening device comprising the base part and the blocking part;

[0057] FIG. 7A the sectional view of FIG. 5B;

[0058] FIG. 7B an enlarged view of the arrangement of FIG. 7A in the section A;

[0059] FIG. 8A a view of a second exemplary embodiment of a fastening device;

[0060] FIG. 8B a sectional view along line A-A of FIG. 8A;

[0061] FIG. 9A a view of the fastening device when a base part and a fastening assembly of the fastening device are fitted to each other;

[0062] FIG. 9B a sectional view of the arrangement of FIG. 9A;

[0063] FIG. 10A a view of the fastening device on further fitting of the base part and the fastening assembly of the fastening device to each other;

[0064] FIG. 10B a sectional view of the arrangement of FIG. 10A;

[0065] FIG. 11A a view of the fastening device in a fitted position of the base part and the fastening assembly;

[0066] FIG. 11B a sectional view of the arrangement of FIG. 11A;

[0067] FIG. 12A a view of the fastening device when the blocking part is connected to the base part;

[0068] FIG. 12B a sectional view of the arrangement of FIG. 12A;

[0069] FIG. 13A a view of the fastening device on release of the blocking part from the base part;

[0070] FIG. 13B a sectional view of the arrangement of FIG. 13A;

[0071] FIG. 14 a view of the fastening device comprising the base part and the blocking part;

[0072] FIG. 15A the sectional view of FIG. 13B;

[0073] FIG. 15B an enlarged view of the arrangement of FIG. 15A in the section A;

[0074] FIG. 16 a view of another exemplary embodiment of a fastening device comprising a base part and a blocking part;

[0075] FIG. 17A a sectional view through the fastening device;

[0076] FIG. 17B an enlarged view of the arrangement of FIG. 17A in the section A; and

[0077] FIG. 18 a schematic view of an exemplary embodiment of a fastening device comprising a base part, a fastening assembly and a screw element for fastening the base part to the fastening assembly.

DESCRIPTION OF THE INVENTION

[0078] FIGS. 1A, 1B to 7A, 7B show a first exemplary embodiment of a fastening device 1 which includes a base part 2, a fastening assembly 4 and a blocking part 3, as this can be seen for example in FIG. 1A.

[0079] In a starting position, the base part 2, the fastening assembly 4 and the blocking part 3 are present separately, as this can be seen in FIGS. 1A and 1B. The base part 2 can be fixed for example to a superordinate assembly, for example to a vehicle, for instance to a two-wheeler, in particular to a bicycle, in order to provide for fastening the fastening assembly 4 to the vehicle via the base part 2. The blocking part 3 then serves for securing the connection between the fastening assembly 4 and the base part 2.

[0080] The base part 2 includes a body 20 and an engaging portion 21 in the form of a peg stub, which protrudes from the body 20 in the direction of the fastening assembly 4. Within the substantially cylindrical engaging portion 21 an engagement opening 210 is formed, into which the blocking part 3 can engage with an engaging element 31 in the form of a peg protruding from a body 30 in order to connect the blocking part 3 to the base part 2.

[0081] Radially outside the engaging portion 21 two latching elements 22 protrude from the body 20 of the base part 2, which are arranged on diametrically opposed sides of the engaging portion 21 and each include a form-fit element 220 in the form of a latching nose pointing to the outside.

[0082] For connecting the fastening assembly 4, for example in the form of a fender, to the base part 2 it is possible to fit the base part 2 and the fastening assembly 4 to each other along a fitting direction X1 (when the base part 2 is fixed for example to a vehicle, for instance to a bicycle, the fastening assembly 4 usually is fitted to the base part 2. The latching elements 22 at the body 20 of the base part 2 here get into engagement with an engagement opening 41 in a surface portion 40 of the fastening assembly 4 due to the fact that the form-fit elements 220 in the form of the latching noses at the latching elements 22 engage behind opposed edge portions 410 of the fastening opening 41, as this is shown in the sequence from FIGS. 2A, 2B to FIGS. 4A, 4B.

[0083] The latching elements 22 of the base part 2 for example integrally made from plastic material by means of plastic injection molding are elastically deflectable. When fitting the base part 2 and the fastening assembly 4 to each other along the fitting direction X1, the form-fit elements 220 beveled at their ends facing away from the body 20 run up on the associated edge portions 410 and thereby are radially urged to the inside, as this is shown in the transition from FIGS. 2A, 2B towards FIGS. 3A, 3B. On further fitting, the form-fit elements 220 snap into engagement with the edge portions 410 and engage behind the edge portions 410 so that a positive connection is produced between the base part 2 and the fastening assembly 4, as this is shown in FIGS. 4A, 4B.

[0084] To secure the connection between the base part 2 and the fastening assembly 4, the blocking part 3 then can be fitted to the base part 2 in a fitting direction X2, as this is shown in FIGS. 5A, 5B. On fitting, the engaging element 31 in the form of the peg at the body 30 of the blocking part 3 gets into engagement with the engagement opening 210 in the engaging portion 21 of the base part 2, and a fixing element 32 annularly shaped on the body 30 of the blocking part 3, shown for example in FIG. 6, comes to lie on the inside of the latching elements 22 of the base part 2, as can be taken from FIG. 5B.

[0085] When the blocking part 3 is connected, a deflection of the latching elements 22 radially to the inside thus is blocked so that the form fit between the base part 2 and the fastening assembly 4 is secured. Without detaching the blocking part 3, the connection between the base part 2 and the fastening assembly 4 can no longer be released.

[0086] In the position secured by the blocking part 3, the base part 2 and the blocking part 3 receive the surface portion 40 of the fastening assembly 4 between them. The connection of the fastening assembly 4 to the base part 2 here is made via the latching elements 22.

[0087] When the fastening assembly 4 is loaded along the fitting direction X1 to the base part 2, the latching elements 22 inwardly press against the fixing element 32, but cannot be inwardly deflected beyond the fixing element 32 so that the form-fit elements 220 in the form of the latching noses at the latching elements 22 cannot be moved past the edge portions 410 and the positive connection between the base part 2 and the fastening assembly 4 thus is secured, as can be taken from the views of FIGS. 7A, 7B.

[0088] The base part 2 and the blocking part 3 each include a magnetic element 23, 33, which magnetic elements cooperate in a magnetically attracting manner when the blocking part 3 is fitted to the base part 2. The magnetic element 23 of the base part 2 here is received in a peg-shaped receiving portion 24 of the base part 2. The magnetic element 33 of the blocking part 3 is enclosed in the engaging element 31. When the blocking part 3 is fitted to the base part 2, the magnetic elements 23, 33 magnetically attract each other so that the engaging element 31 is automatically drawn into engagement with the engagement opening 210 of the engaging portion 21 of the base part 2 and in the connected position is held in the engagement opening 210.

[0089] In this exemplary embodiment the blocking part 3 thus is retained at the base part 2 due to the magnetic forces of the magnetic elements 23, 33.

[0090] When the blocking part 3 is to be released from the base part 2, the blocking part 3 can be withdrawn from the base part 2 against the fitting direction X2. For this purpose, the magnetic forces of the magnetic elements 23, 33 must be overcome.

[0091] When the blocking part 3 is detached, the form fit between the base part 2 and the fastening assembly 4 can be eliminated so that the fastening assembly 4 can be detached from the base part 2.

[0092] In an exemplary embodiment shown in FIGS. 8A, 8B to 15A, 15B the base part 2 includes a first thread means 211 within the engagement opening 210, and the blocking part 3 includes a second thread means 311 on the outside of the engaging element 31, each realized by a plurality of thread turns.

[0093] For connecting the blocking part 3 to the base part 2, the engaging element 31 is screwed into the engagement opening 210 in a screwing direction X3 via the thread means 211, 311, as this is shown in the transition from FIGS. 11A, 11B to FIGS. 12A, 12B, wherein the connection is magnetically supported due to the forces of magnetic attraction of the magnetic elements 23, 33 of the base part 2 and the blocking part 3. The pitch of the thread turns of the thread means 211, 311 can be chosen such that due to the forces of magnetic attraction the blocking part 3 is largely automatically drawn into threaded engagement with the engagement opening 210, until the connected position as shown in FIGS. 12A, 12B and 15A, 15B is reached.

[0094] For release, conversely, the blocking part 3 can be screwed in a screwing direction X5 opposite to the screwing direction X3 so as to come out of threaded engagement with the engagement opening 210 of the engaging portion 21 of the base part 2, so that the blocking part 3 can be removed from the base part 2 in a release direction X4, as this is shown in FIGS. 13A, 13B. Thus, the blocking part 3 can be screwingly released from the base part 2 in order to detach the fastening assembly 4 from the base part 2.

[0095] Otherwise, the exemplary embodiment of FIGS. 8A, 8B to 15A, 15B is functionally identical with the exemplary embodiment of FIGS. 1A, 1B to 7A, 7B so that reference is made to the preceding explanations.

[0096] Due to the threaded engagement between the blocking part 3 and the base part 2 an improved connection of the blocking part 3 with the base part 2 possibly is obtained, which in particular can also reliably withstand a shock load. In addition, the operability can be improved for a user, because in particular the release of the blocking part 3 by a screwing movement can be easier and more comfortable.

[0097] FIGS. 16, 17A, 17B show another exemplary embodiment in which in a modification of the exemplary embodiment of FIGS. 8A, 8B to 15A, 15B a form-fit device 221 in the form of a toothing is provided on the inside of the latching elements 22, i.e. on a side facing the engaging portion 21, which is configured to cooperate with a form-fit device 321 on a circumferentially outer side of the fixing element 32 of the blocking part 3.

[0098] The form-fit devices 221, 231 in the exemplary embodiment of FIGS. 16, 17A, 17B serve to prevent an (unwanted) rotation of the blocking part 3 with respect to the base part 2. When the blocking part 3 is fitted to the base part 2, but the fastening assembly 4 is not loaded with respect to the base part 2, the form-fit devices 221, 321 can rattle over each other and the blocking part 3 thus can be rotated relative to the base part 2 along the screwing direction X5. When the connection between the base part 2 and the fastening assembly 4 on the other hand is loaded due to the fact that a force is applied between the base part 2 and the fastening assembly 4 along the fitting direction X1, the form-fit devices 221, 321 are positively pressed into engagement with each other radially to the inside due to the load acting on the latching elements 22 so that the rotary position of the blocking part 3 with respect to the base part 2 is secured and the blocking part 3 thus cannot easily be rotated relative to the base part 2 along the screwing direction X5. The attachment of the fastening assembly 4 to the base part 2 hence is additionally secured and blocked.

[0099] Otherwise, the exemplary embodiment of FIGS. 16, 17A, 17B is functionally identical with the exemplary embodiment of FIGS. 8A, 8B to 15A, 15B.

[0100] FIG. 18 shows an exemplary embodiment in which a fastening assembly 4 can be connected to a base part 2 via a screw element 5. The base part 2 in turn can be fixed to a superordinate assembly, for example a vehicle, or be part of such a superordinate assembly so that the fastening assembly 4, for example in the form of a fender of a bicycle, can be fixed via the base part 2.

[0101] The base part 2 includes a first magnetic element 23 and the screw element 5 includes a second magnetic element 53 on a shank 51 protruding from a head 50. On the shank 51 of the screw element 5 a thread 52 also is shaped in the usual way so that the screw element 5 can be screwed into an engagement opening 210 with a thread 211 shaped therein in order to fix the fastening assembly 4 to the base part 2. In the screwed position, the fastening assembly 4 is held for example between a body 20 of the base part 2 and a disk 54 through which the shank 51 of the screw element 5 extends, and is thereby fixed to the base part 2.

[0102] Due to the fact that on the base part 2 on the one hand and on the screw element 5 on the other hand a magnetic element 23, 53 each is arranged, the connection of the screw element 5 to the base part 2 is magnetically secured in the screwed position. In particular under a vibration load, the screw element 5 thus cannot inadvertently be released from the base part 2.

[0103] The idea underlying the proposed solution is not limited to the exemplary embodiments illustrated, but can also be realized in a different way.

[0104] The magnetic elements in the exemplary embodiments described above can each be configured for example as a permanent magnet. It is also conceivable, however, that the magnetic elements are configured on the one hand as a permanent magnet and on the other hand as a ferromagnetic armature. In this connection it is only decisive that a force of magnetic attraction to support the fitting of the parts to each other and/or to hold the parts against each other in a connected position is provided by the magnetic elements.

[0105] A fastening device as described here can serve for fastening entirely different fastening assemblies to entirely different superordinate assemblies. It can be advantageous to use such a fastening device on a vehicle, for example on a bicycle, for fastening a fender. However, this is not limiting.

LIST OF REFERENCE NUMERALS

[0106] 1 fastening device [0107] 2 base part [0108] 20 body [0109] 21 engaging portion (peg) [0110] 210 engagement opening [0111] 211 thread [0112] 22 latching element [0113] 220 form-fit element [0114] 221 form-fit device [0115] 23 magnetic element [0116] 24 portion [0117] 3 blocking part [0118] 30 body [0119] 31 engaging element (pin) [0120] 311 thread [0121] 32 fixing element [0122] 321 form-fit device [0123] 33 magnetic element [0124] 4 fastening assembly [0125] 40 surface portion [0126] 41 fastening opening [0127] 410 edge portion [0128] 5 screw element [0129] 50 head [0130] 51 shank [0131] 52 thread [0132] 53 magnetic element [0133] 54 disk element [0134] X1, X2 fitting direction [0135] X3 screwing direction [0136] X4 release direction [0137] X5 screwing direction