Release fastening device and method for operating a release fastening device

Abstract

A releasable fastening device includes a sleeve, an engagement structure, and first and second lever arms. The sleeve is configured to be inserted from a first side of an object into an opening of the object. The first lever arm is pivotally attached to the sleeve at a first pivot point, and the second lever arm is pivotally attached to the sleeve at a second pivot point. Both the first lever arm and the second lever arm are slidably connected to the engagement structure. The fastening device is configured to move between a mounting position where the fastening device can be inserted into the object and a fastening position where the fastening device is attached to the object. The first lever arm includes a first attachment surface, and the second lever arm includes a second attachment surface, wherein the first attachment surface is configured to engage a first engagement surface arranged on a second side of the object in a manner related to the opening in the fastening position, and the second attachment surface is configured to engage a second engagement surface arranged on the second side of the object in a manner related to the opening in the fastening position.

Description

Technical Field

[0001] The present disclosure relates to a releasable fastening device that includes a sleeve, an engagement structure, a first lever arm, and a second lever arm. The sleeve is configured to be inserted into an opening of an object from a first side of the object. The fastening device is configured to move between a mounting position where the fastening device can be inserted into the object and a fastening position where the fastening device is attached to the object. The present disclosure also relates to a method for operating a releasable fastening device. Background Art

[0002] Different types of fastening devices are commonly used to attach various objects in different types of applications. In the automotive industry, fastening devices are used to hold objects attached to a vehicle structure or other objects, and screws, rivets, or clips are typically used. The use of fastening devices is a time-consuming part of vehicle manufacturing operations, and during the design of a vehicle, it is desirable to make the use of fastening devices as efficient, fail-safe, cost-effective, and easy to use as possible.

[0003] For example, when using screws in vehicle assembly operations, it is often necessary to control the tightening torque in order to know that the screw is properly tightened to hold for the desired application. Such control is time-consuming and, if the torque measurement is incorrect, may result in incorrect operating steps. The actual axial force exerted by a screw when tightened depends on many parameters, such as friction, speed, and elasticity, which may be difficult to predict well. When using screws, it is also necessary to prepare the threading or welding of nuts for fastening. During the assembly process, there may be a problem of incorrect screwing. In the automotive industry, when an operator is assembling a vehicle, the vehicle assembly time is a crucial factor. There are fastening devices that can be quickly fastened, such as smaller plastic clips that are mainly used for fastening other plastic parts such as trim panels, cover plates, or other vehicle components. Generally, the plastic clips used are structurally weak and difficult to reuse if disassembled. In many cases, it is desirable to remove the fastening device without damaging it when necessary, so the use of disposable clips or rivets is limited and not suitable for such applications.

[0004] Therefore, there is a need for an improved releasable fastening device and a method for operating the releasable fastening device. Summary of the Invention

[0005] It is an object of the present disclosure to provide a releasable fastening device and a method for operating a releasable fastening device that avoid the aforementioned problems. This object is achieved at least in part by the features of the independent claims. The dependent claims contain further improvements of the releasable fastening device.

[0006] The present disclosure relates to a releasable fastening device, which includes a sleeve (socket), an engagement structure, a first lever arm, and a second lever arm. The sleeve is configured to be inserted into an opening of an object from a first side of the object. The first lever arm is pivotally attached to the sleeve at a first pivot point, and the second lever arm is pivotally attached to the sleeve at a second pivot point. The first lever arm is slidably connected to the engagement structure, and the second lever arm is slidably connected to the engagement structure. The fastening device is configured to move between a mounting position where the fastening device can be inserted into the object and a fastening position where the fastening device is attached to the object. The first lever arm includes a first attachment surface, and the second lever arm includes a second attachment surface, wherein the first attachment surface is configured to engage a first engagement surface arranged on a second side of the object in a manner related to the opening in the fastening position, and the second attachment surface is configured to engage a second engagement surface arranged on a second side of the object in a manner related to the opening in the fastening position.

[0007] The advantages of having these features are that, by having the construction of the lever arms, the fastening device can have a firm and flexible structure. When the fastening device is used during vehicle assembly, no additional tools and / or fastening torque need to be applied, and the fastening operation can be made fast and efficient, and with this structure and function, the risk of vehicle manufacturing errors is minimized. With this releasable structure, the fastening device can be reused after disassembly. If needed, the fastening device can be removed without damage, and a suitable tool can be used to remove the fastening device.

[0008] According to one aspect of the present disclosure, the fastening device includes a first shaft connected to the sleeve and the first lever arm, and a second shaft connected to the sleeve and the second lever arm. The first lever arm is arranged to be pivotable about the first shaft at the first pivot point, and the second lever arm is arranged to be pivotable about the second shaft at the second pivot point. These shafts provide an effective pivoting function of the lever arms around the respective pivot points to flexibly use the releasable fastening device.

[0009] According to another aspect of the present disclosure, the first lever arm includes a first arm section extending between the first pivot point and a first arm end, wherein the first arm end is slidably connected to the engagement structure. The second lever arm includes a second arm section extending between the second pivot point and a second arm end, wherein the second arm end is slidably connected to the engagement structure. The slidable connection of the arm ends to the engagement structure forms a simple and flexible solution, wherein, through these connections, the lever arms are movably arranged on the engagement structure to efficiently open and close (shut) the fastening device.

[0010] According to one aspect of the present disclosure, the first lever arm includes a third arm section extending between a first pivot point and a third arm end, wherein a first attachment surface is arranged to be associated with the third arm end. The second lever arm includes a fourth arm section extending between a second pivot point and a fourth arm end, wherein a second attachment surface is arranged to be associated with the fourth arm end. This arrangement of the attachment surfaces on the respective arm sections being associated with the arm ends forms a pivoting function with a lever effect, wherein the holding force of the fastening device can be designed to suit a specific application purpose.

[0011] According to another aspect of the present disclosure, the first arm section and the third arm section extend in different directions from the first pivot point. The second arm section and the fourth arm section extend in different directions from the second pivot point. The extension in different directions provides a compact structure of the fastening device, wherein the lever arms are arranged to be movable relative to each other for an efficient fastening operation.

[0012] According to one aspect of the present disclosure, the first arm section and the second arm section are configured to be positioned relative to each other in an X-shaped configuration in the fastening position. This X-shaped configuration also contributes to a compact and effective design of the fastening device, wherein the lever arms are effectively used for the fastening operation.

[0013] According to another aspect of the present disclosure, the sleeve includes a support structure having a support surface, wherein the support surface is configured to engage a first side of an object. The support surface can be made to have a secure structure for holding the fastening device in a tight connection to the object. The support surface can also be shaped to correspond to the shape of the object.

[0014] According to another aspect of the present disclosure, the sleeve includes an extension structure, wherein the extension structure is configured to extend into an opening of the object. The extension structure provides a stable structure of the sleeve and can have a shape corresponding to the shape of the opening for an effective fastening function of the fastening device. The extension surface is arranged to extend through the opening and establish an appropriate position of the lever arms relative to the object.

[0015] According to one aspect of the present disclosure, the engagement structure includes one or more slots. The first arm end and the second arm end are slidably connected to the one or more slots. The slots hold the lever arms in connection with the engagement structure. The slots are used to slidably engage the lever arms relative to the engagement structure.

[0016] According to another aspect of the present disclosure, the fastening device includes a locking device configured to releasably lock the engagement structure to the sleeve in the fastening position. The locking device provides a firm connection between the sleeve and the engagement structure in the fastening position. The locking device ensures that the fastening device does not accidentally disconnect when arranged in the fastening position.

[0017] According to another aspect of the present disclosure, the locking device includes one or more locking grooves disposed in the engagement structure and one or more locking pins disposed in the sleeve. Each locking pin is configured to lockingly engage with a corresponding locking groove in the fastening position.

[0018] According to one aspect of the present disclosure, the locking device includes one or more locking recesses disposed in the sleeve. Each locking pin is slidably connected to a corresponding locking recess. The sliding connection forms an effective locking function.

[0019] According to another aspect of the present disclosure, the locking device includes one or more springs. Each locking pin is slidably connected to a corresponding locking recess via a corresponding spring. The one or more springs provide a simple and firm solution for the sliding function of each of the locking pins relative to the corresponding locking recess. The one or more springs can be used for the latching action of the locking pins relative to the locking grooves of the engagement structure.

[0020] According to another aspect of the present disclosure, the engagement structure is configured to move in a direction towards the sleeve when the fastening device is displaced from the installation position to the fastening position. The engagement structure is configured to move in a direction away from the sleeve when the fastening device is displaced from the fastening position to the installation position. The first lever arm is configured to pivot about a first pivot point when the fastening device is displaced between the installation position and the fastening position, and the second lever arm is configured to pivot about a second pivot point when the fastening device is displaced between the installation position and the fastening position.

[0021] According to one aspect of the present disclosure, the engagement structure is arranged as a shroud, and the engagement structure is configured to at least partially surround the sleeve in the fastening position. The shroud structure is used to surround the sleeve to achieve a compact, firm and efficient design of the fastening device.

[0022] The present disclosure also relates to a method for operating a releasable fastening device, wherein the fastening device comprises a sleeve, an engagement structure, a first lever arm and a second lever arm. The first lever arm is pivotally attached to the sleeve at a first pivot point, and the second lever arm is pivotally attached to the sleeve at a second pivot point. The first lever arm is slidably connected to the engagement structure, and the second lever arm is slidably connected to the engagement structure. The first lever arm includes a first attachment surface, and the second lever arm includes a second attachment surface. The fastening device is movable between a mounting position in which the fastening device can be inserted into an opening of an object and a fastening position in which the fastening device is attached to the object. The method includes the steps of: when the fastening device is disposed in the mounting position, inserting the sleeve into the opening from a first side of the object, displacing the fastening device from the mounting position to the fastening position, and during the movement of the fastening device from the mounting position to the fastening position, causing the first attachment surface to engage a first engagement surface disposed on a second side of the object in a manner related to the opening, and causing the second attachment surface to engage a second engagement surface, the second engagement surface being disposed on the second side of the object in a manner related to the opening; or, the method includes the steps of: displacing the fastening device from the fastening position to the mounting position, wherein, in the fastening position, the first attachment surface engages the first engagement surface, the first engagement surface being disposed on the second side of the object in a manner related to the opening, and the second attachment surface engages the second engagement surface, the second engagement surface being disposed on the second side of the object in a manner related to the opening, during the movement of the fastening device from the fastening position to the mounting position, disengaging the first attachment surface from the first engagement surface, and disengaging the second attachment surface from the second engagement surface, and when the fastening device is disposed in the mounting position or when the fastening device is displaced towards the mounting position, removing the sleeve from the opening from the first side of the object.

[0023] Advantages of these features are that, by having the construction with lever arms, the method provides a secure and flexible connection. When using the fastening device, no additional tools and / or application of a fastening torque are required, and the fastening operation can be made fast, efficient, and the risk of errors in vehicle manufacturing is minimized. However, if desired, such a design can be made to require additional tools to separate the fastening device. By this method, the fastening device is suitable for reuse after disassembly. If needed, the fastening device can be removed without being damaged or impaired. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present disclosure will be described in detail below with reference to the drawings, in which

[0025] Figure 1 FIG. 1 schematically shows a perspective view of a releasable fastening device according to the present disclosure in a mounting position,

[0026] Figure 2A cross-sectional side perspective view schematically showing a releasable fastening device according to the present disclosure in an installed position.

[0027] Figure 3 A cross-sectional side perspective view schematically showing a releasable fastening device according to the present disclosure in a fastened position.

[0028] Figure 4 A cross-sectional side view schematically showing a releasable fastening device according to the present disclosure in an installed position and in a fastened position.

[0029] Figure 5 A bottom view schematically showing a releasable fastening device according to the present disclosure, and

[0030] Figure 6 A perspective view from above and to the side schematically showing a releasable fastening device according to the present disclosure in a fastened position. Detailed Description

[0031] Aspects of the present disclosure will be described below with reference to the accompanying drawings, for purposes of description and not limitation, where like reference numerals represent like elements, and variations of the aspects described are not limited to the specifically shown embodiments, but are applicable to other variations of the present disclosure.

[0032] Figure 1-6 A releasable fastening device 1 according to the present disclosure is schematically shown. In Figure 1 and Figure 2 the fastening device 1 is positioned in the installed position P M in which the fastening device 1 can be inserted into an opening 101 of an object 100. As shown, the object 100 can be a vehicle structure having a sheet-like configuration (such as steel, aluminum, or composite material), and the fastening device 1 is attached to the sheet-like configuration. The fastening device 1 can be arranged to attach or hold two or more sheet-like structures tightly to each other, and the object 100 thus consists of two or more sheet-like structures having corresponding openings for inserting the fastening device 1. The fastening device 1 can also be arranged to connect other vehicle components, such as trim panels or cover plates, to the object 100, where the object 100 can consist of one or more sheet-like structures. In any case, one or more fastening devices 1 can be used together to achieve the desired purpose. It should be understood that the object 100 is not limited to sheet-like structures, and any type of structure having a suitable opening 101 can constitute the object 100. In Figure 3 the fastening device 1 is shown in the fastened position P F in which the fastening device is firmly attached to the object 100.

[0033] AsFigure 1-6 As shown, the releasable fastening device 1 includes a sleeve 2, an engagement structure 3, a first lever arm 4a, and a second lever arm 4b. The sleeve 2 is a structural part of the fastening device and is configured to be inserted into an opening 101 of an object 100 from a first side 102a of the object 100. In Figure 2 and Figure 3 the illustrated embodiment, the first side 102a may be referred to as the upper side of the object 100. Thus, the fastening device 1 has been inserted into the opening 101 from above in a downward direction in the Figure 2 and Figure 3 illustrated positions, and the sleeve 2 is inserted into the opening 101 in the illustrated position. The sleeve 2 and the engagement structure 3 may have any suitable shape, and if appropriate, the shape of the sleeve 2 may correspond to the shape of the opening 101.

[0034] The sleeve 2 in the depicted embodiment includes a support structure 9 having a support surface 10, wherein the support surface 10 is configured to engage and contact the first side 102a of the object 100. In Figure 2 and Figure 3 the illustrated embodiment, the support structure 9 is disposed on the upper side of the object 100, and the support surface 10 contacts the first side 102a of the object 100. The support surface 10 is disposed as the lower surface of the support structure 9, which contacts the first side 102a. As Figure 2 and Figure 3 shown, the sleeve 2 further includes an extension structure 11, and the extension structure 11 is configured to extend into the opening 101 of the object 100. Figure 2 and Figure 3 The extension structure 11 in the illustrated embodiment is a part of the sleeve 2 that is at least partially configured to be inserted into the opening 101 and, in the illustrated position, projects downward from the support structure 9 through the opening 101 and below the opening 101. The support structure 9 and the extension structure 11 may form an integral part of the sleeve 2. The sleeve 2 may be made of any suitable material, such as steel, aluminum, or other suitable metals. The sleeve 2 may also be suitably made of plastic, composite materials, or a combination of different materials. The extension structure 11 may suitably have a shape corresponding to the shape of the opening 101.

[0035] The first lever arm 4a is pivotally attached to the sleeve 2 at the first pivot point 5a, and the second lever arm 4b is pivotally attached to the sleeve 2 at the second pivot point 5b. The first lever arm 4a is arranged to pivot relative to the sleeve 2 at the first pivot point 5a, and as shown, the first pivot point 5a is arranged on the extension structure 11 of the sleeve 2. The second lever arm 4b is arranged to pivot relative to the sleeve 2 at the second pivot point 5b, and as shown, the second pivot point 5b is arranged on the extension structure 11 of the sleeve 2. The lever arms can be made of any suitable material, such as steel, aluminum, or other suitable metals. The lever arms can also be suitably made of plastic or composite materials, or made of a combination of different materials. It should be understood that the shape of the lever arms can be different from that shown in the depicted embodiments.

[0036] As shown, the first pivot point 5a can be arranged to connect to the first shaft 18a of the sleeve 2 and the first lever arm 4a, and the first lever arm 4a is arranged to be able to pivot about the first shaft 18a at the first pivot point 5a. The second pivot point can be arranged to connect to the second shaft 18b of the sleeve 2 and the second lever arm 4b, and the second lever arm 4b is arranged to be able to pivot about the second shaft 18b at the second pivot point 5b. The first shaft 18a and the second shaft 18b can be arranged as separate structural elements that are attached to the sleeve 2 and the corresponding lever arms, thereby allowing the lever arms to rotate about the corresponding shafts. The shafts can be made of any suitable material, such as plastic materials, steel, aluminum, or other suitable metals or composite materials. In an alternative embodiment, the shafts can be arranged as an integral part of the sleeve 2, or arranged as an integral part of the lever arms, thereby allowing the lever arms to rotate relative to the sleeve 2 at the pivot points. As Figure 2 and Figure 3 shown in the embodiment of, the first shaft 18a and the second shaft 18b are arranged at the lower part of the extension structure 11 of the sleeve 2.

[0037] The engagement structure 3 is arranged to cooperate with the first lever arm 4a and the second lever arm 4b to close and open the structure of the fastening device 1. The engagement structure 3 can have any suitable shape, and in the depicted embodiment, the engagement structure 3 is arranged as a shroud, wherein, as Figure 3 , 4 and 6 schematically show, the shroud is configured to at least partially surround the sleeve 2 in the fastening position P F . The engagement structure 3 can be made of any suitable material, such as steel, aluminum, or other suitable metals. The engagement structure 3 can also be suitably made of plastic or composite materials, or made of a combination of different materials. The engagement structure 3 can be provided with holes 3a or similar structures for connecting other vehicle components (such as decorative panels or cover plates) to the fastening device 1. As Figure 1 and Figure 2As shown, the hole 3a can enter from below the engagement structure 3 at the installation position P M and other vehicle components can be connected to the engagement structure 3 by screws or other fastening means passing through the hole 3a. Then, at Figure 1 the installation position P M shown, other vehicle components can be connected to the outer side 3b of the engagement structure 3, and screws or other fastening means can be inserted through the hole 3a from below the engagement structure 3 and screwed or attached to the vehicle component to achieve a firm engagement between the vehicle component and the engagement structure 3. Then, the fastening device 1 can be quickly inserted into the object 100 for a quick assembly process.

[0038] The first lever arm 4a is slidably connected to the engagement structure 3, and the second lever arm 4b is slidably connected to the engagement structure 3. The sliding connection between the lever arm and the engagement structure 3 is used to pivot the lever arm around the corresponding pivot point when closing and opening the fastening device 1, that is, to move the engagement structure 3 up or down between the positions shown in the embodiment of the fastening device 1 shown in Figure 2 and Figure 3 which will be further described below. As described above, the fastening device 1 is configured to be movable between the installation position P M where the fastening device 1 can be inserted into the object 100 and the fastening position P F where the fastening device is attached to the object 100. When the fastening device 1 has been inserted into the opening 101, the fastening device 1 can be closed by shifting it from the installation position P M to the fastening position P F . If necessary, the fastening device 1 can be opened by shifting it from the fastening position P F back to the installation position P M , and in the installation position P M the fastening device 1 can be removed from the opening 101.

[0039] The engagement structure 3 includes one or more slots 12, and in the illustrated embodiment, the engagement structure includes a common slot 12 for the lever arms. In the illustrated embodiment, the first arm end 8a of the first lever arm 4a and the second arm end 8b of the second lever arm 4b are slidably connected to the slot 12. The first arm end 8a and the second arm end 8b are the parts on the respective lever arms that are arranged to be connected and include the tips of the lever arm ends. The one or more slots 12 can be configured as grooves for the respective lever arms, where the respective arm ends are arranged to slide when opening or closing the fastening device 1. The arm ends can be arranged in a common slot as shown, or alternatively, each arm end can be arranged in a different slot. As Figure 2 and 3As schematically shown, the connection between each arm end and its slot may be arranged to have any suitable connecting means, such as a projection or a sliding pin 19, that engages with one or more grooves 12a or tracks provided in the slot 12. In the illustrated embodiment, each corresponding arm end is provided with a pin 19, and the slot 12 is provided with two grooves 12a for the corresponding pins 19 for sliding engagement. If desired, the grooves 12a may have an extension along the slot 12 that limits the movement of the corresponding pins 19. The pins 19 and / or the grooves 12a may be provided with means for holding the respective pins 19 and the corresponding grooves 12a in a secure position relative to each other during the sliding movement.

[0040] As Figure 2-4 shown, the first lever arm 4a includes a first attachment surface 6a, and the second lever arm 4b includes a second attachment surface 6b. The first attachment surface 6a is configured to engage, in a fastening position P F with a first engagement surface 103a disposed on the second side 102b of the object 100 in a manner related to the opening 101. The second attachment surface 6b is configured to engage, in a fastening position P F with a second engagement surface 103b disposed on the second side 102b of the object 100 in a manner related to the opening 101. The engagement surfaces on the second side 102b of the object may be any suitable surface and / or edge for engaging with the attachment surfaces, such as the side surface of the opening 101, the edge of the opening 101, or the surface of the second side 102b of the object 100, such as the lower surface of the opening 101 in the depicted embodiment. As Figure 2 and Figure 3 also shown, the first attachment surface 6a and the second attachment surface 6b may be inclined to effectively engage the respective first engagement surface 103a and second engagement surface 103b for securely holding the fastening device 1 in place relative to the object 100 and also for handling different thicknesses and opening sizes of the object 100. By the inclined or beveled configuration of the first attachment surface 6a and the second attachment surface 6b, the fastening device 1 can be used for objects 100 having different thicknesses and different opening 101 sizes. Thus, depending on the design of the first attachment surface 6a and the second attachment surface 6b, the fastening device 1 can be used for different objects 100 having different opening sizes and object thicknesses within a specific range.

[0041] As shown in the figure, the first lever arm 4a includes a first arm section 7a extending between a first pivot point 5a and a first arm end 8a, wherein the first arm end 8a is slidably connected to the engagement structure 3. The second lever arm 4b includes a second arm section 7b extending between a second pivot point 5b and a second arm end 8b, wherein the second arm end 8b is slidably connected to the engagement structure 3. The first lever arm 4a includes a third arm section 7c extending between the first pivot point 5a and a third arm end 8c, and a first attachment surface 6a is disposed on the third arm section 7c in connection with the third arm end 8c. The second lever arm 4b includes a fourth arm section 7d extending between the second pivot point 5b and a fourth arm end 8d, and a second attachment surface 6b is disposed on the fourth arm section 7d in connection with the fourth arm end 8d. The arrangement of the first attachment surface 6a on the third arm section 7c and the arrangement of the second attachment surface 6b on the fourth arm section 7d together with the first arm section 7a and the second arm section 7b form a pivoting function with a lever effect of the lever arm, wherein the holding force of the fastening device 1 can be designed to be suitable for a specific application purpose. Through the lever effect, the fastening device 1 can, for example, change the length of the arm section based on the configuration of the opening 101 to which the fastening device is arranged to be attached, so as to be designed for a specific predetermined holding force. The size of the opening 101 and the thickness of the object 100 are examples of parameters that can be considered when designing the fastening device for a specific application and holding force.

[0042] The engagement structure 3 is configured to move in the direction towards the sleeve 2 during the closing operation when the fastening device 1 is displaced from the installation position P M to the fastening position P F The engagement structure 3 is configured to move in the direction away from the sleeve 2 during the opening operation when the fastening device 1 is displaced from the fastening position P F to the installation position P M The first lever arm 4a is configured to pivot about the first pivot point 5a when the fastening device 1 is displaced between the installation position P M and the fastening position P F The second lever arm 4b is configured to pivot about the second pivot point 5b when the fastening device 1 is displaced between the installation position P M and the fastening position P F

[0043] As shown in the figure, the first arm section 7a and the third arm section 7c extend from the first pivot point 5a in different directions. The second arm section 7b and the fourth arm section 7d extend from the second pivot point 5b in different directions. The extension of the corresponding arm sections in different directions provides a compact structure of the fastening device 1 for efficient fastening operations. As Figure 3 shown, the first arm section 7a and the second arm section 7b are configured to be in the fastening position P Fare positioned relative to each other in an X-shaped configuration. From the structure of the fastening device 1 in the figure, it can be understood that the first lever arm 4a and the second lever arm 4b are connected to each other and are mounted 180 degrees apart from each other or conversely, allowing the first arm section 7a and the second arm section 7b to be positioned in an X-shaped configuration. This X-shaped configuration also contributes to a compact and efficient design of the fastening device 1, where the lever arms are efficiently used for the fastening operation.

[0044] As Figure 2 and 3 shown, the fastening device 1 further includes a locking device 13 which is configured to releasably lock the engagement structure 3 to the sleeve 2 in the fastening position P F The locking device 13 secures the engagement structure to the sleeve 2 to prevent the inadvertent or accidental removal of the fastening device 1 from the object 100. The locking device 13 includes one or more locking grooves 14 arranged in the engagement structure 3 and one or more corresponding locking pins 15 arranged in the sleeve 2. One or more locking grooves 14 may be arranged to engage an opening or recess of the locking pin 15 in the fastening position P F Each locking pin 15 is configured to lockingly engage with a corresponding locking groove 14 in the fastening position P F In addition, as Figure 2 and Figure 3 shown, the locking device 13 includes one or more locking recesses 16 (channels) arranged in the sleeve 2. Each locking pin 15 is slidably connected to a corresponding locking recess 16. The locking device 13 includes one or more springs 17, where each locking pin 15 is slidably connected to a corresponding locking recess 16 and is also connected to a corresponding spring 17. As Figure 2 shown, in the installation position P M , the locking pins 15 may protrude partially from their locking recesses 16. One or more springs 17 can be used for the snap action between the locking pins 15 and the corresponding locking grooves 14 of the engagement structure 3.

[0045] When the fastening device 1 is locked with the locking device 13, the fastening device 1 is displaced from the installation position P M to the fastening position P F , and the locking pins 15 are first pushed into the locking recesses 16 when hitting the lower part of the engagement structure 3, which can be understood from Figure 2 and Figure 3 , and then when aligned with the corresponding locking grooves 14, as Figure 3As shown, the locking pin 15 is allowed to pop out into the locking groove for a firm engagement between the engagement structure 3 and the sleeve 2. To remove the fastening device 1 from the object 100, the locking pin 15 can be pushed into the corresponding locking recess 16 to release the locking pin 15 from the locking groove 14 and thus release the engagement structure 3 from the sleeve 2. When pushing the locking pin into the corresponding locking recess, an appropriate tool can be used for the release operation to prevent an undesired release operation. When the fastening device 1 is unlocked, the fastening device 1 can be shifted from the fastening position P F to the mounting position P M .

[0046] As Figure 3 schematically shown, the locking groove 14 can be configured to extend through the engagement structure 3, and the locking pin 15 can be arranged such that it can be seen from the outside of the engagement structure 3 when engaging the locking groove 14. This arrangement can provide a visual indication that the locking pin 15 is in a locked engagement with the locking groove 14 to firmly lock the engagement structure 3 to the sleeve 2.

[0047] To attach the releasable fastening device 1 to the object 100, the fastening device 1 is shifted from the mounting position P M where the fastening device 1 can be inserted into the opening 101 of the object 100 to the fastening position P F where the fastening device 1 is attached to the object 100. When the fastening device 1 is arranged in the mounting position P M , the sleeve 2 can be inserted into the opening 101 from the first side 102a of the object 100. When the sleeve 2 has been inserted into the opening 101, by shifting the engagement structure 3 in the direction towards the sleeve 2, the fastening device 1 is moved from the mounting position P M to the fastening position P F . This shift can be performed, for example, by an operator who directly or indirectly pushes the engagement structure 3 towards the sleeve 2 through the attachment portion. During the shift of the engagement structure 3 towards the sleeve 2, the first lever arm 4a and the second lever arm 4b move from the Figure 2 shown mounting position P M to the Figure 3 shown fastening position P F by a pivoting movement. During the shift of the lever arms, the lever arms slide relative to the slot 12 in the engagement structure 3 through the sliding connection of the first arm end 8a of the first lever arm 4a and the second arm end 8b of the second lever arm 4b. In the depicted embodiment, the first arm end 8a and the second arm end 8b slide from the Figure 2 shown corresponding arm ends to the mounting position P M where they are arranged more towards the middle position of the engagement structure 3 and slide to the Figure 3 shown fastening position P F . In the Figure 3 shown fastening position PF In this case, the arm ends have slidably displaced towards the outer edge of the engagement structure 3, and through the sliding displacement of the lever arms combined with the pivoting movement about the respective pivot points, the first arm section 7a and the second arm section 7b are arranged in the X-shaped configuration as described above. During the movement of the fastening device 1 from the installation position P M to the fastening position P F the first attachment surface 6a engages, in a manner associated with the opening 101, the first engagement surface 103a arranged on the second side 102b of the object 100, and the second attachment surface 6b engages, in a manner associated with the opening 101, the second engagement surface 103b arranged on the second side 102b of the object 100. As described above, during the displacement of the fastening device 1 from the installation position P M to the fastening position P F the locking device 13 further releasably locks the engagement structure 3 to the sleeve 2.

[0048] To remove the fastening device 1 from the object 100, such that the fastening device 1 is displaced from the fastening position P where the fastening device 1 is attached to the object 100 F to the installation position P where the fastening device 1 can be removed from the opening 101 of the object 100 M . First, as described above, the locking device 13 is released, for example, with a suitable tool, thereby allowing the fastening device 1 to move from the fastening position P F to the installation position P M . In the fastening position P F the first attachment surface 6a engages, in a manner associated with the opening 101, the first engagement surface 103a arranged on the second side 102b of the object 100, and the second attachment surface 6b engages, in a manner associated with the opening 101, the second engagement surface 103b arranged on the second side 102b of the object 100. During the movement of the fastening device from the fastening position P F to the installation position P M the first attachment surface 6a disengages from the first engagement surface 103a, and the second attachment surface 6b disengages from the second engagement surface 103b. When the respective attachment surfaces have disengaged from their corresponding engagement surfaces, when the fastening device 1 is arranged in the installation position P M or when the fastening device 1 moves towards the installation position P M the sleeve 2 can be removed from the opening 101 from the first side 102a of the object 100. Thus, when the first attachment surface 6a and the second attachment surface 6b no longer engage the object 100 or interfere with the opening 101, the fastening device 1 can be removed from the opening 101.

[0049] As described above, the fastening device 1 can be made of a rigid material so as to have better holding ability than conventional plastic clips. The lever arms can be made of a slightly flexible material to accommodate minor tolerances in the thickness of the object 100 and to apply a constant pressure on the object 100 in the fastening position P F When the diameter of the opening 101 of the object 100 is not only slightly larger than the diameter of the sleeve 2, the lever arms will cause the fastening device 1 to be self - centering during fastening in the fastening position P F by virtue of the inclined attachment surface and the direction of the force vector from the lever arms. The different parts of the fastening device 1 can be calculated and dimensioned in a suitable manner in order to obtain the desired functionality and holding force. If necessary, more details such as bearings can be added to the fastening device 1. If necessary, the fastening device 1 can also be arranged to have more than two lever arms.

[0050] It should be understood that the foregoing description is exemplary in nature and is not intended to limit the present disclosure, its application, or its use. Although specific examples have been described in the specification and illustrated in the drawings, those skilled in the art will understand that various changes can be made and elements thereof can be replaced with equivalents without departing from the scope of the present disclosure as defined in the claims. In addition, modifications can be made to adapt a particular situation or material to the teachings of the present disclosure without departing from the basic scope of the present disclosure. Therefore, it is not intended that the present disclosure be limited to the specific examples disclosed as the best mode contemplated for carrying out the teachings of the present disclosure and illustrated in the drawings and described in the specification. Instead, the scope of the present disclosure will include any embodiment falling within the foregoing description and the appended claims. The reference numerals mentioned in the claims should not be regarded as limiting the scope of the matter protected by the claims; their sole function is to make the claims more readily understandable.

[0051] Reference numerals

[0052] 1 fastening device

[0053] 2 sleeve

[0054] 3 engaging structure

[0055] 3a hole of the engaging structure

[0056] 3b outer side of the engaging structure

[0057] 4a first lever arm

[0058] 4b second lever arm

[0059] 5a first pivot point

[0060] 5b second pivot point

[0061] 6a First attachment surface

[0062] 6b Second attachment surface

[0063] 7a First arm section

[0064] 7b Second arm section

[0065] 7c Third arm section

[0066] 7d Fourth arm section

[0067] 8a First arm end

[0068] 8b Second arm end

[0069] 8c Third arm end

[0070] 8d Fourth arm end

[0071] 9 Support structure

[0072] 10 Support surface

[0073] 11 Extension structure

[0074] 12 Slot

[0075] 12a Groove

[0076] 13 Locking device

[0077] 14 Locking groove

[0078] 15 Locking pin

[0079] 16 Locking recess

[0080] 17 Spring

[0081] 18a First shaft

[0082] 18b Second shaft

[0083] 19 Pin

[0084] 100 Object

[0085] 101 Opening

[0086] 102a First side of the object,

[0087] 102b Second side of the object,

[0088] 103a First engagement surface of the object

[0089] 103b Second engagement surface of the object

Claims

1. A releasable fastening device (1), said fastening device (1) comprising a sleeve (2), an engagement structure (3), a first lever arm (4a) and a second lever arm (4b), wherein, The sleeve (2) is configured to be inserted into an opening (101) of an object (100) from a first side (102a) of the object (100); wherein the first lever arm (4a) is pivotally attached to the sleeve (2) at a first pivot point (5a), the second lever arm (4b) is pivotally attached to the sleeve (2) at a second pivot point (5b), wherein the first lever arm (4a) is slidably connected to the engagement structure (3), and the second lever arm (4b) is slidably connected to the engagement structure (3); Wherein, the fastening device (1) is configured to be movable between an installation position (P M ) where the fastening device (1) can be inserted into the object (100) and a fastening position (P F ) where the fastening device is attached to the object (100); Wherein, the first lever arm (4a) includes a first attachment surface (6a), the second lever arm (4b) includes a second attachment surface (6b), wherein the first attachment surface (6a) is configured to engage a first engagement surface (103a) at the fastening position (P F ), the first engagement surface (103a) being arranged on a second side (102b) of the object (100) in relation to the opening (101), and wherein the second attachment surface (6b) is configured to engage a second engagement surface (103b) at the fastening position (P F ), the second engagement surface (103b) being arranged on the second side (102b) of the object (100) in relation to the opening (101); wherein the first lever arm (4a) includes a first arm section (7a) extending between the first pivot point (5a) and a first arm end (8a), wherein the first arm end (8a) is slidably connected to the engagement structure (3); wherein the second lever arm (4b) includes a second arm section (7b) extending between the second pivot point (5b) and a second arm end (8b), wherein the second arm end (8b) is slidably connected to the engagement structure (3); and Wherein, the first arm section (7a) and the second arm section (7b) are configured to be positioned relative to each other in an X-shaped configuration at the fastening position (P F ).

2. The releasable fastening device (1) according to claim 1, wherein, The fastening device (1) includes a first shaft (18a) connected to the sleeve (2) and the first lever arm (4a) and a second shaft (18b) connected to the sleeve (2) and the second lever arm (4b); wherein the first lever arm (4a) is pivotally arranged about the first shaft (18a) at the first pivot point (5a); and wherein the second lever arm (4b) is pivotally arranged about the second shaft (18b) at the second pivot point (5b).

3. The releasable fastening device (1) according to claim 1, wherein, The first lever arm (4a) includes a third arm section (7c) extending between the first pivot point (5a) and a third arm end (8c), wherein the first attachment surface (6a) is arranged in relation to the third arm end (8c); and wherein the second lever arm (4b) includes a fourth arm section (7d) extending between the second pivot point (5b) and a fourth arm end (8d), wherein the second attachment surface (6b) is arranged in relation to the fourth arm end (8d).

4. The releasable fastening device (1) according to claim 3, wherein, The first arm section (7a) and the third arm section (7c) extend in different directions from the first pivot point (5a), and wherein the second arm section (7b) and the fourth arm section (7d) extend in different directions from the second pivot point (5b).

5. The releasable fastening device (1) according to claim 1, wherein, The sleeve (2) includes a support structure (9) having a support surface (10), wherein the support surface (10) is configured to engage the first side (102a) of the object (100).

6. The releasable fastening device (1) according to claim 1, wherein, The sleeve (2) includes an extension structure (11), wherein the extension structure (11) is configured to extend into the opening (101) of the object (100).

7. The releasable fastening device (1) according to claim 1, wherein, The engagement structure (3) includes one or more slots (12), wherein the first arm end (8a) and the second arm end (8b) are slidably connected to the one or more slots (12).

8. The releasable fastening device (1) according to claim 1, wherein, The fastening device (1) includes a locking device (13) which is configured to releasably lock the engagement structure (3) to the sleeve (2) in the fastening position (P F ).

9. The releasable fastening device (1) according to claim 8, wherein, The locking device (13) includes one or more locking grooves (14) arranged in the engagement structure (3) and one or more locking pins (15) arranged in the sleeve (2), wherein each locking pin (15) is configured to engage lockingly with a corresponding locking groove (14) in the fastening position (P F ).

10. The releasable fastening device (1) according to claim 9, wherein, The locking device (13) includes one or more locking grooves (16) arranged in the sleeve (2), wherein each locking pin (15) is slidably connected to a corresponding locking groove (16).

11. The releasable fastening device (1) according to claim 10, wherein, The locking device (13) includes one or more springs (17), wherein each locking pin (15) is slidably connected to a corresponding locking groove (16) via a corresponding spring (17).

12. The releasable fastening device (1) according to any one of the preceding claims, wherein, The joining structure (3) is configured to move in a direction towards the sleeve (2) when the fastening device (1) is displaced from the mounting position (P M ) to the fastening position (P F ); and wherein the joining structure (3) is configured to move in a direction away from the sleeve (2) when the fastening device (1) is displaced from the fastening position (P F ) to the mounting position (P M ); wherein the first lever arm (4a) is configured to pivot about the first pivot point (5a) when the fastening device (1) is displaced between the mounting position (P M ) and the fastening position (P F ); and Wherein, the second lever arm (4b) is configured to pivot about the second pivot point (5b) when the fastening device (1) is displaced between the installation position (PM) and the fastening position (PF).

13. The releasable fastening device (1) according to any one of claims 1-11, wherein, The joining structure (3) is arranged as a shroud, and wherein the joining structure (3) is configured to at least partially surround the sleeve (2) at the fastening position (P F ).

14. A method for operating a releasable fastening device (1), wherein, The fastening device (1) includes a sleeve (2), an engagement structure (3), a first lever arm (4a) and a second lever arm (4b), wherein the first lever arm (4a) is pivotally attached to the sleeve (2) at a first pivot point (5a), the second lever arm (4b) is pivotally attached to the sleeve (2) at a second pivot point (5b), wherein the first lever arm (4a) is slidably connected to the engagement structure (3), and the second lever arm (4b) is slidably connected to the engagement structure (3), wherein the first lever arm (4a) includes a first attachment surface (6a), and the second lever arm (4b) includes a second attachment surface (6b); Wherein, the fastening device (1) can move between an installation position (P M ) where the fastening device (1) can be inserted into an opening (101) of an object (100) and a fastening position (P F ) where the fastening device (1) is attached to the object (100); Wherein, the first lever arm (4a) includes a first arm section (7a) extending between the first pivot point (5a) and a first arm end (8a), wherein the first arm end (8a) is slidably connected to the engagement structure (3); Wherein, the second lever arm (4b) includes a second arm section (7b) extending between the second pivot point (5b) and a second arm end (8b), wherein the second arm end (8b) is slidably connected to the engagement structure (3); Wherein, the method includes the following steps: When the fastening device (1) is arranged at the installation position (P M ), insert the sleeve (2) into the opening (101) from the first side (102a) of the object (100); displace the fastening device from the installation position (P M ) to the fastening position (P F ), and during the movement of the fastening device (1) from the installation position (P M ) to the fastening position (P F ), cause a first engagement surface (103a) arranged on the second side (102b) of the object (100) in relation to the opening (101) to engage the first attachment surface (6a), and cause a second engagement surface (103b) arranged on the second side (102b) of the object (100) in relation to the opening (101) to engage the second attachment surface (6b), wherein the first arm section (7a) and the second arm section (7b) are configured to be positioned relative to each other in an X-shaped configuration at the fastening position (P F ); or Wherein, the method comprises the following steps: moving the fastening device from the fastening position (P F ) to the installation position (P M ), wherein the first arm section (7a) and the second arm section (7b) are configured to be positioned relative to each other in an X-shaped configuration at the fastening position (P F ), wherein at the fastening position (P F ), the first attachment surface (6a) engages a first engagement surface (103a) disposed on the second side (102b) of the object (100) associated with the opening (101), and the second attachment surface (6b) engages a second engagement surface (103b) disposed on the second side (102b) of the object (100) associated with the opening (101); during the movement of the fastening device from the fastening position (P F ) to the installation position (P M ), disengaging the first attachment surface (6a) from the first engagement surface (103a), and disengaging the second attachment surface (6b) from the second engagement surface (103b); and removing the sleeve (2) from the opening (101) from the first side (102a) of the object (100) when the fastening device (1) is disposed at the installation position (P M ) or when the fastening device (1) is displaced towards the installation position (P M ).

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