Closure

Abstract

The invention relates to a closure device comprising a cylindrical receptacle (6) having a cylindrical axis and a cylindrical insert (1) coaxial to the receptacle (6). The insert (1) can be inserted into the receptacle (6) and rotated into the closed position about the cylindrical axis. Before the closed position is reached, at least two circumferentially-ramped locking projections (3) on the insert each abut against circumferentially-ramped locking projections (8) on the receiving part (6) (viewed from the circumferential direction). During further rotation, a radial force is generated on the locking projection (3) of the insert (1). The design of the insert (1) is such that, as a result of a force acting on the locking projection (3), the locking projection (3) is pressed radially inward, resulting in an elliptical deformation of the end of the insert (1) facing the receiving part (6), the locking projection (8) of the receiving part (6) being crossed by the locking projection (3) of the insert in order to achieve a stable closed position, the insert (1) can be transferred to the open position by applying a force to rotate in the opposite direction.

Description

(19) State Intellectual Property Office (12) Invention Patent Application (10) Application Publication Number (43) Application Publication Date (21) Application Number 202610184363.8 (22) Application Date 2026.02.09 (30) Priority Data 25158336.5 2025.02.17 EP (71) Applicant BB Coffee GmbH Address Lower Haching, Germany (72) Inventor Bernd Braun Franz Saver Hofstetter (74) Patent Agency Beijing Beixin Zhicheng Intellectual Property Agency Co., Ltd. 11100 Patent Attorney Zhang Jing Zhou Jiaxin (51) Int.Cl. F16B 21 / 02 (2006.01) A47J 43 / 07 (2006.01) (54) Invention Title: Closing Device (57) Abstract: This invention proposes a closing device comprising a cylindrical receiving member (6) having a cylindrical axis and a cylindrical insert (1) coaxial with the receiving member (6). The insert (1) is insertable into the receiving member (6) and rotates to a closed position about the cylindrical axis. Before reaching the closed position, at least two circumferentially ramped locking protrusions (3) on the insert abut against circumferentially ramped locking protrusions (8) on the receiving member (6) (viewed from the circumferential direction). During further rotation, radial forces are generated on the locking protrusions (3) of the insert (1). The design of the insert (1) causes the locking protrusion (3) to be pressed radially inward due to the force acting on it, which causes the end of the insert (1) facing the receiver (6) to undergo elliptical deformation. The locking protrusion (8) of the receiver (6) is passed by the locking protrusion (3) of the insert, thereby achieving a stable closed position. By applying force to rotate the insert (1) in the opposite direction, it can be moved to the open position. Claims 2 pages, Description 3 pages, Drawings 4 pages, CN 122328441 A 2026.07.03 CN 1 22 32 84 41 A 1. A closing device, characterized in that it comprises: a cylindrical receiving member (6) having a cylindrical axis; and a cylindrical insert (1) coaxial with the receiving member (6), the insert (1) being insertable into the receiving member (6) and being rotated about the cylindrical axis to a closed position; before reaching the closed position, at least two circumferentially sloping locking protrusions (3) on the insert abut against a circumferentially sloping locking protrusion (8) on the receiving member (6), and during further rotation, a radial force acting on the locking protrusion (3) of the insert (1) is generated, the insert (1) being designed such that the locking protrusion (3) is pressed radially inward due to the force acting on the locking protrusion (3), fromThis causes the end of the insert (1) facing the receiver (6) to undergo elliptical deformation, and the locking protrusion (8) of the receiver (6) is crossed by the locking protrusion (3) of the insert, thereby achieving a stable closed position. By applying force and rotating the insert (1) in the opposite direction, the closed position can be transferred to an open position. 2. The closing device according to claim 1, characterized in that, when viewed circumferentially, the slope shape of the side of the locking protrusion (8) of the receiver (6) facing the locking protrusion (3) of the insert (1) is steeper than the slope shape of the side facing away from the locking protrusion (3) of the insert (1) when the receiver (6) is in the closed position. 3. The closing device according to claim 1 or 2, characterized in that the receiver (6) and the insert (1) are made of metal and / or plastic. 4. The closing device as claimed in claim 1, 2 or 3, characterized in that the receiving member (6) has two protrusions (7) with opposite diameters, the two protrusions extending radially inward and having a certain distance, and in the state of being connected with the insert (1), the distance between the end of the protrusion (7) and the end of the receiving member (6) facing the insert (1) is small, and a locking protrusion (8) in a circumferentially inclined shape is provided on the side of the protrusion (7) facing away from the insert (1); wherein, the side of the insert (1), at the end facing the receiving member (6) in the state of being connected with the receiving member (6), has two radially elastic deformation regions (2) with opposite diameters and whose thickness is less than the thickness of the other side, and two locking protrusions (3) with opposite diameters and in a circumferentially inclined shape, the two locking protrusions (3) being approximately offset by 90° relative to the center of the radially elastic deformation region (2); Each of the radial elastic deformation regions (2) is followed by a region of less thickness, which is a partially annular threaded groove (4) with a certain pitch and extends below the locking protrusion (3) so as to form a threaded connection with the radially inwardly extending protrusion (7) of the receiving member (6). The insert (1) can be inserted into the receiver (6) and can be rotated about the cylindrical axis to a closed position. Before reaching the closed position, the locking protrusions (3) of the insert abut against the locking protrusions (8) of the receiver in the circumferential direction. During further rotation, a radial force is generated on the locking protrusions (3) of the insert (1). This radial force causes the radially elastic deformable areas (2) of the insert (1) to be radially squeezed outward, resulting in an elliptical deformation at the end of the insert (1) facing the receiver (6). The locking protrusions (8) of the receiver (3) are passed by the locking protrusions (3) of the insert (1), thereby achieving a stable closed position. By applying force and rotating the insert (1) in the opposite direction, the closed position can be transferred to the open position. 5. As claimed in claim4. The closing device is characterized in that a groove (5) is provided at the end of the partially annular threaded groove (4) of the insert (1). 6. The closing device according to claim 1, 2, 3, 4 or 5 is characterized in that the receiving member (6) is a grinder body and the insert (1) is a container for holding the material to be ground by a manual household grinder, especially a manual coffee grinder or a manual salt, pepper, grain or spice grinder; or, the receiving member (6) is integrated or integrally integrated into the grinder body and the insert (1) is integrated or integrally integrated into the container for holding the material to be ground by a manual household grinder, especially a manual coffee grinder or a manual salt, pepper, grain or spice grinder; or, the insert is a container and the receiving member is a lid of the container. Claims 2 / 2 Page 3 CN 122328441 A Closure Device Technical Field

[0001] The present invention relates to a closure device, and more particularly to a detachable mechanical connection between two cylindrical components that can be connected by interlocking and rotating, and can be disconnected again, as detailed in the preamble of claim 1. Background Art

[0002] Such fasteners are known in the prior art; for example, so-called bayonet fasteners. Summary of the Invention

[0003] The object of the present invention is to provide a closure device as described above, which can be manufactured in a cost-effective manner, is easy to operate, and can be transferred to the open position in a non-destructive manner.

[0004] This object is achieved by the features of claim 1. Other embodiments and advantages are apparent, as detailed in the appended claims.

[0005] Therefore, the present invention provides a closing device comprising a cylindrical receiving member having a cylindrical axis and a cylindrical insert coaxial with the receiving member, wherein the insert is insertable into the receiving member and can be moved to a closed position within the receiving member by rotating about the cylindrical axis.

[0006] Before reaching the closed position, at least two circumferentially opposite locking protrusions on the insert abut against the circumferentially inclined locking protrusions on the receiving member (viewed circumferentially). During further rotation to the closed position, the locking protrusions of the receiving member can exert a radially inward force on the locking protrusions of the insert.

[0007] According to the present invention, the insert is designed such that the force acting on the locking protrusions can push the locking protrusions radially inward, thereby causing an elliptical deformation at the end of the insert facing the receiving member, thereby causing the locking protrusions of the receiving member to pass over the locking protrusions of the insert, ultimately reaching a stable closed position. Applying a force and rotating the insert in the opposite direction can close the device.The position is changed to the open position. In the closed position, since the locking protrusion of the insert abuts against the receiver in the circumferential direction, the receiver maintains its original cylindrical shape, and therefore the locking protrusion of the insert is not subjected to radially inward force.

[0008] Therefore, the insert is designed so that when subjected to radially inward force on the locking protrusion, it undergoes a generally elliptical deformation, the minor axis of which connects the two locking protrusions.

[0009] The receiver and the insert can be made of metal and / or plastic. According to one embodiment, the locking protrusion of the receiver is designed such that, when viewed circumferentially in the closed position, the slope shape on the side facing the locking protrusion of the insert is steeper than the slope shape on the side facing away from the locking protrusion of the insert. This effectively ensures that the force required to open the closing device is greater than the force required to move the closing device to the closed position.

[0010] The receiving member can be designed, for example, as a grinder body, while the insert can be designed as a container for holding the material to be ground in a manual household grinder (especially a manual coffee grinder or a manual salt, pepper, grain, rice, or spice grinder). Alternatively, the receiving member can be integrated or integrally integrated into, for example, the grinder body, while the insert can be integrated or integrally integrated into the material container of a manual household grinder, especially a manual coffee grinder or a manual salt, pepper, grain, rice, or spice grinder (see page 1 / 3 of the specification, CN 122328441 A). Furthermore, the insert can be a container, and the receiving member can be a lid of that container.

[0011] According to a particularly advantageous embodiment of the invention, the receiving member has two opposing, partially annular, spaced protrusions extending radially inward, and in the connected state with the insert, each protrusion has a circumferentially sloping locking protrusion on the side facing away from the insert.

[0012] Furthermore, the side of the insert, at the end facing the receiver in its connected state, has two radially opposing elastic deformation regions, each thinner than the other sides, and two opposing locking protrusions designed to be sloping along the circumferential direction and offset 90° circumferentially relative to the center of the elastic deformation regions.

[0013] By setting the thinner elastic deformation regions and applying a radially inward force to the locking protrusions, elliptical deformation of the insert can be achieved. Furthermore, after completing the rotational movement to transfer the closing device to the closed position, the insert can return to its original cylindrical shape.

[0014] Additionally, each elastic deformation region is followed by a thinner region that extends below the locking protrusions in the form of a partially annular threaded groove with a certain pitch to form a threaded connection with the radially inwardly extending protrusions of the receiver.

[0015] The insert can be inserted into the receiver and transferred to the closed position by rotating it about the cylindrical axis. During this process, viewed from the circumferential direction, the locking protrusion of the insert always abuts against the locking protrusion of the receiver before reaching the closed position.

[0016] During further rotation, the locking protrusion of the insert slides on the locking protrusion of the receiver, thereby generating a radial force on the locking protrusion of the insert. This radial force causes the radial elastic deformation area of ​​the insert to be radially compressed outward, resulting in an elliptical deformation at the end of the insert facing the receiver, and the locking protrusion of the receiver is crossed by the locking protrusion of the insert, thereby achieving a stable closed position. By applying force and rotating the insert in the opposite direction, the closed position can be converted into an open position.

[0017] Especially when the receiver is designed as the grinder body and the insert is designed as the material container of a household manual grinder, or both are integrated into the grinder body or the receiver and the insert, a groove for receiving material can be provided at the end of the partially annular threaded groove of the insert. Therefore, during the rotational motion, abrasive material that may affect the closing function is collected in the groove, thus realizing its advantages. Brief Description of the Drawings

[0018] The invention will now be described in more detail by way of example with reference to the accompanying drawings, which illustrate preferred embodiments. The same component reference numerals denote the same parts, wherein: FIG1 shows a schematic perspective view of an insert according to a first embodiment of the invention; FIG2 shows another perspective view of the insert shown in FIG1; FIG3 is a schematic perspective view showing another insert different from the inserts shown in FIG1 and FIG2, which has a groove for receiving abrasive material; FIG4 shows a schematic perspective view of a receiving member according to an embodiment of the invention; and FIG5 shows a schematic perspective view of the inserts shown in FIG1, 2, and 3 to illustrate elliptical deformation during rotation. Specification 2 / 3 pages 5 CN 122328441 A Detailed Description of the Invention

[0019] FIG1 shows an insert 1 designed according to the invention. As shown in Figure 1, when the insert 1 is connected to the receiver, it has two radially elastic deformation regions 2 with opposite diameters, the thickness of which is less than that of the other sides; and two locking projections 3 with opposite diameters, which are ramp-shaped in the circumferential direction and are offset approximately 90° in the circumferential direction relative to the center of the elastic deformation region 2.

[0020] In particular, as shown in Figure 2, each elastic deformation region 2 is followed by a thinner region that extends below the locking projection 3 in the form of a partially annular threaded groove 4 with a certain pitch.

[0021] The insert embodiment shown in Figure 3 is the same as the embodiments shown in Figures 1 and 2, except that each insertThe end of each of the partially annular threaded grooves 4 is provided with a pocket 5. This design is particularly advantageous if the receiver is designed as the grinder body and the insert is designed as the grinding material container of a manual home grinder, or both are integrated into their respective components. This is because, during rotational movement, grinding material that might affect the closing function is collected in the pocket 5.

[0022] Figure 4 shows a receiver 6 corresponding to the insert in Figures 1, 2, and 3. Here, the receiver 6 has two radially inwardly extending, oppositely sized, and partially annular protrusions 7 at its ends, with a certain distance between them. When connected to the insert, the ends of the protrusions 7 are at a small distance from the end of the receiver 6 facing the insert. On the side of the protrusion 7 facing away from the insert, there is a locking protrusion 8 designed as a ramp in the circumferential direction. In the example shown, the receiver 6 is integrated into the grinder body of a manual home grinder (e.g., a coffee grinder).

[0023] According to the present invention, the groove 4 shown in Figures 1, 2, and 3 interacts with the radially inwardly extending protrusion 7 of the receiving member 6 shown in Figure 4 to form a threaded connection in the closed position.

[0024] According to the present invention, the insert 1 can be inserted into the receiving member 6 and rotated to the closed position about a common cylindrical axis. Before reaching the closed position, the locking protrusion 3 of the insert 1 always abuts against the locking protrusion 8 of the receiving member 6 in the circumferential direction. During further rotation, a radial force is generated acting on the locking protrusion 3 of the insert 1.

[0025] Therefore, the elastic deformation region 2 of the insert 1 is pressed radially outward, causing an elliptical deformation at the end of the insert 1 facing the receiving member 6, so that the locking protrusion 8 of the receiving member 6 is passed by the locking protrusion 3 of the insert 1, forming a stable closed position. By applying force and rotating the insert in the opposite direction, the closed position can be transferred to the open position. The elliptical deformation of the insert 1 is shown in Figure 5.

[0026] According to the design concept of the present invention, a closing device that is low in production cost, easy to operate, and can be transferred to the open position in a non-destructive manner can be manufactured; furthermore, since this function has been integrated into the insert, no additional components such as spring sheets are required.

[0027] Symbol Explanation 1 Insert 2 Radial elastic deformation area 3 Locking protrusion 4 Threaded groove 5 Groove 6 Receiving part 7 Protrusion 8 Locking protrusion Specification 3 / 3 page 6 CN 122328441 A Figure 1 Specification Figure 1 / 4 page 7 CN 122328441 A Figure 2 Specification Figure 2 / 4 page 8 CN 122328441 A Figure 3 Figure 4 Specification Figure 3 / 4 page 9 CN 122328441 A Figure 5 Specification Figure 4 / 4 page 10 CN122328441 A Proposed is a closure, comprising a cylindrical receiving part (6) with a cylinder axis and a cylindrical insert part (1) coaxial with the receiving part (6), wherein the insert part (1) can be inserted into the receiving part (6) and can be transferred therein to a closing position by rotation in a direction of rotation about the cylinder axis, wherein, before the closing position is reached, at least two diametrically opposed locking projections (3) of the insert part, which are designed to be ramp-shaped in the circumferential direction, rest in each case against a locking projection (8) of the receiving part (6), which is designed to be ramp- shaped in the circumferential direction, as viewed in the circumferential direction, wherein during the further rotation process, a radial force acting on the locking projections (3) of the insert part (1) can be generated, wherein the insert part (1) is designed in such a manner that due to the force acting on the lockingprojections (3), the locking projections (3) are pressed radially inwards such that as a result of the thereby generated elliptical deformation of the end of the insert part (1) facing the receiving part (6), the locking projections (8) of the receiving part (6) are passed over by the locking projections (3) of the insert part, whereby a stable closing position can be achieved which can be transferred to an open position by rotating the insert part (1) in an opposite direction with the application of force. Abstract

Claims

1. A closing device, characterized in that, include: A cylindrical receiving element (6) having a cylindrical axis; as well as A cylindrical insert (1) coaxial with the receiver (6) is inserted into the receiver (6) and rotated about the cylindrical axis to a closed position. Before reaching the closed position, at least two circumferentially sloping locking protrusions (3) on the insert abut against a circumferentially sloping locking protrusion (8) on the receiver (6). During further rotation, the locking protrusions (3) acting on the insert (1) are activated. The radial force of the insert (1) is such that the locking protrusion (3) is pressed radially inward due to the force acting on it, which causes the end of the insert (1) facing the receiver (6) to undergo elliptical deformation. The locking protrusion (8) of the receiver (6) is passed over by the locking protrusion (3) of the insert, thereby achieving a stable closed position. By applying force and rotating the insert (1) in the opposite direction, the closed position can be transferred to an open position.

2. The closing device as claimed in claim 1, characterized in that, When the locking protrusion (8) of the receiver (6) is in the closed position, when viewed in the circumferential direction, the slope shape of the side of the locking protrusion (3) facing the insert (1) is steeper than the slope shape of the side of the locking protrusion (3) facing away from the insert (1).

3. The closing device as claimed in claim 1 or 2, characterized in that, The receiver (6) and the insert (1) are made of metal and / or plastic.

4. The closing device as claimed in claim 1, 2 or 3, characterized in that, The receiver (6) has two protrusions (7) with opposite diameters. The two protrusions extend radially inward and have a certain distance between them. When connected to the insert (1), the distance between the end of the protrusion (7) and the end of the receiver (6) facing the insert (1) is small. On the side of the protrusion (7) facing away from the insert (1), a locking protrusion (8) is provided in a circumferentially inclined manner. Among them, the side of the insert (1), at the end facing the receiver (6) in the state of being connected with the receiver (6), has two radial elastic deformation regions (2) with opposite diameters and their thickness is less than the thickness of the other side, and two locking protrusions (3) with opposite diameters and sloped in the circumferential direction, the two locking protrusions (3) being approximately offset by 90° relative to the center of the radial elastic deformation region (2). Each of the radial elastic deformation regions (2) is followed by a region of less thickness, which is a partially annular threaded groove (4) with a certain pitch and extends below the locking protrusion (3) so as to form a threaded connection with the radially inwardly extending protrusion (7) of the receiving member (6). The insert (1) can be inserted into the receiver (6) and can be rotated to a closed position inside the cylinder axis. Before reaching the closed position, the locking protrusions (3) of the insert abut against the locking protrusions (8) of the receiver in the circumferential direction. During further rotation, a radial force is generated on the locking protrusions (3) of the insert (1). The radial force causes the radially elastic deformable areas (2) of the insert (1) to be radially squeezed outward, resulting in an elliptical deformation at the end of the insert (1) facing the receiver (6). The locking protrusions (8) of the receiver (3) are passed by the locking protrusions (3) of the insert (1), thereby achieving a stable closed position. By applying force and rotating the insert (1) in the opposite direction, the closed position can be transferred to the open position.

5. The closing device as claimed in claim 4, characterized in that, A groove (5) is provided at the end of the threaded groove (4) of the insert (1) in a partial annular shape.

6. The closing device as claimed in claim 1, 2, 3, 4 or 5, characterized in that, The receiving part (6) is the grinder body, and the insert (1) is a container for holding the material to be ground by a manual household grinder, especially a manual coffee grinder or a manual salt, pepper, grain or spice grinder; or the receiving part (6) is integrated or integrally integrated into the grinder body, and the insert (1) is integrated or integrally integrated into the container for holding the material to be ground by a manual household grinder, especially a manual coffee grinder or a manual salt, pepper, grain or spice grinder; or the insert is a container, and the receiving part is a lid of the container.

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