Fastening components and pots

Abstract

The present application provides a fastening assembly and a cookware. The fastening assembly is used to connect two workpieces, one of which is provided with a threaded column, and a limiting protrusion is provided on the threaded column. The fastening assembly includes: a limiting member, the limiting member is provided with a threaded hole and a receiving cavity that are connected; and an operating member, the operating member is fixedly installed in the receiving cavity, and the operating member includes a limiting end, and the end surface of the limiting end facing the threaded hole is provided with an anti-loosening groove, the anti-loosening groove includes a sliding end and a snap end, and the recessed depth of the snap end is greater than the recessed depth of the sliding end; the threaded hole is sleeved on the threaded column, the threaded column passes through the threaded hole and cooperates with the limiting end, the limiting protrusion can be relatively rotated to slide into the sliding end, and continue to slide until it falls into and snaps into the snap end to lock the threaded hole and the threaded column. In the present application, when the threaded column of the workpiece is locked with the threaded hole of the limiting member, the limiting protrusion is not easy to slide out of the snap end, and the threaded connection is not easy to loosen.

Description

Technical Field

[0001] The present application relates to the technical field of cooking utensils, and in particular to a fastening assembly and a cooker. Background Art

[0002] The existing cookware includes a pot cover, a lid head, and a fastener (such as a stud, a bolt, etc.) that directly fixes the lid head on the pot cover. The fastener is threadedly connected to the pot cover to fix and press the lid head on the pot cover. Since the fastener is very easy to loosen its thread, it is generally prevented from loosening by adding a spring washer or applying a fastening glue on the connecting thread.

[0003] However, the existing anti-loosening structure is not reliable, and the fastening glue will lose its effect as it ages over time; the use of spring washers will still cause the threads to loosen due to the use environment and long-term movement, such as relative rotation of the lid, vibration during transportation, or rotation by the user during use, resulting in an unreliable connection between the lid and the pot cover. Summary of the invention

[0004] In view of this, the present application provides a fastening assembly and a cookware, which can realize anti-loosening of threaded connection.

[0005] In one aspect, the present application provides a fastening assembly. The fastening assembly is used to connect two workpieces, one of which is provided with a threaded column, and the threaded column is provided with a limiting protrusion, and the fastening assembly includes:

[0006] A limiting member, wherein the limiting member is provided with a threaded hole and a receiving cavity that are connected to each other; and

[0007] An operating member, the operating member is fixedly installed in the accommodating cavity, and the operating member includes a limiting end, an end surface of the limiting end facing the threaded hole is provided with an anti-loosening groove, the anti-loosening groove includes a sliding end and a buckle end, and the recessed depth of the buckle end is greater than the recessed depth of the sliding end;

[0008] Among them, the threaded hole is sleeved on the threaded column, the threaded column passes through the threaded hole and cooperates with the limiting end, the limiting protrusion can be relatively rotated to slide into the sliding end, and continue to slide until it falls in and is buckled on the buckle end to lock the threaded hole and the threaded column.

[0009] Optionally, the anti-loosening groove is an arc-shaped groove with an inclined bottom surface or a spiral groove extending in a spiral slope shape, and the sliding end and the buckle end are respectively located at two ends of the anti-loosening groove.

[0010] Optionally, the sliding-in end extends toward the buckle end to form the anti-loosening groove, and at least one step is formed between the sliding-in end and the buckle end, and the step smoothly connects the sliding-in end and the buckle end.

[0011] Optionally, the intersection of the accommodating cavity and the threaded hole is a step surface, and the limiting end abuts against the step surface;

[0012] An elastic member is also provided in the accommodating cavity, and the elastic member is configured to be elastically deformable so that the limiting end and the step surface are kept in contact with each other.

[0013] Optionally, the operating member includes a knob cap, which is detachably mounted in the accommodating cavity, and both ends of the elastic member elastically abut against the knob cap and the limiting end.

[0014] Optionally, the position-limiting member and the knob cap are respectively provided with a first clamping groove and a first clamping hook; the first clamping groove is communicated with the accommodating cavity, and the first clamping hook is elastically provided on the outer wall of the knob cap;

[0015] The knob cap moves axially along the accommodating cavity until the first hook is limited in the first groove, so that the knob cap and the limiting member are circumferentially fixed.

[0016] Optionally, the knob cap further includes a handling portion extending to be exposed outside the accommodating cavity;

[0017] The position limiting member and the handling portion are respectively provided with a positioning hole and a positioning column;

[0018] The positioning column penetrates into the positioning hole so that the knob cap and the limiting member are circumferentially fixed.

[0019] Optionally, the operating member further comprises a lock core, and the limiting end is an end surface of the lock core;

[0020] The knob cap is provided with a receiving hole, and the lock core and the elastic member are both installed in the receiving hole.

[0021] Optionally, the lock core and the knob cap are provided with a second hook and a second slot respectively;

[0022] The second hook is limited in the second slot so that the lock core and the knob cap are circumferentially fixed, and the lock core can axially reciprocate in the accommodating hole.

[0023] On the other hand, the present application provides a cookware. The cookware includes a first workpiece and a second workpiece to be connected to each other, and the cookware also includes:

[0024] The aforementioned fastening assembly;

[0025] Wherein, a threaded column is provided on the second workpiece, and a limiting protrusion is provided on the threaded column;

[0026] The limiting member mounts the first workpiece on the second workpiece.

[0027] The technical solution provided by this application can achieve the following beneficial effects:

[0028] In the present application, when the threaded column of the workpiece is locked with the threaded hole of the stopper, the stopper protrusion falls into and snaps into the snapping end. Since the recessed depth of the snapping end is greater than the recessed depth of the sliding end, if the stopper protrusion wants to slide out from the snapping end, whether it slides out through the sliding end or directly slides out from the end of the snapping end away from the sliding end, it must overcome the obstruction of the recessed wall of the snapping end, and it is necessary to overcome a large obstruction resistance, thereby avoiding the loosening of the threaded connection caused by the general relative rotation force of the workpiece during normal use, thereby preventing the threaded column from being separated from the threaded hole, and ensuring the installation position of the stopper. The stopper with a guaranteed installation position can reliably install the first workpiece on the second workpiece, so that the first workpiece and the second workpiece are not easy to separate. When disassembly is required, the rotation force of the screwing operation member is continuously increased, and the fastener can be loosened by sliding out from the sliding end to overcome the recessed depth difference between the sliding end and the snapping end, thereby disassembling the first workpiece and the second workpiece, and disassembly is convenient.

[0029] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a cross-sectional view of a cookware provided by an embodiment of the present application from one viewing angle;

[0031] Figure 2 It is a cross-sectional view of the cookware from another perspective;

[0032] Figure 3 yes Figure 1 A schematic diagram of the structure of the second workpiece in the cooker;

[0033] Figure 4 yes Figure 1 A cross-sectional view of a fastening assembly in a cooker;

[0034] Figure 5 yes Figure 4 A schematic diagram of the structure of the knob cap in the fastening assembly;

[0035] Figure 6 yes Figure 4 A schematic diagram of the structure of the lock core in the fastening assembly;

[0036] Figure 7 yes Figure 1 Schematic diagram of the limiting protrusion in the fastening component being buckled at the buckle end;

[0037] Figure 8 yes Figure 1 Schematic diagram of the limiting protrusion in the fastening assembly being disengaged from the buckle end;

[0038] Reference numerals:

[0039] Limiting parts;

[0040] 11-threaded hole;

[0041] 12-accommodating chamber;

[0042] 122-step surface;

[0043] 14- first card slot;

[0044] 18- flange part;

[0045] 182- positioning hole;

[0046] Knob cap;

[0047] 21-accommodation hole;

[0048] 22- second card slot;

[0049] 24- first hook;

[0050] 26-Management Department;

[0051] 262- positioning column;

[0052] 3-Lock cylinder;

[0053] 32- second hook;

[0054] 33-limit end;

[0055] 34- anti-loosening groove;

[0056] 340- snap end;

[0057] 342- steps;

[0058] 344-Slide-in end

[0059] 4- elastic member;

[0060] 5- first workpiece;

[0061] 50-through hole;

[0062] 6- second workpiece;

[0063] 62-threaded column;

[0064] 622-Limiting protrusion.

[0065] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0066] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0067] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0068] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0069] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0070] It should be understood that unless otherwise specified, "plurality" means two or more.

[0071] Unless otherwise specified or limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0072] According to an embodiment of the present application, a cooker is provided. Figures 1 to 7 , the cookware includes a first workpiece 5, a second workpiece 6 and a fastening assembly. The first workpiece 5 and the second workpiece 6 need to be connected to each other. The fastening assembly can install the first workpiece 5 on the second workpiece 6. In a specific embodiment, the second workpiece 6 is a pot cover, the first workpiece 5 is a cover head, and the fastening assembly can install the cover head on the pot cover. It should be noted that, in other embodiments, the second workpiece 6 and the first workpiece 5 can be any other two parts that need to be fixedly connected to each other, such as a pot body and a pot handle, a pot body handle seat and a pot handle, a pot cover and a cover handle, etc.

[0073] A threaded column 62 is protrudingly provided on the second workpiece 6. The threaded column 62 is extended outwardly from a side surface of the second workpiece 6. An outer peripheral wall of the threaded column 62 is provided with an external thread. A limiting protrusion 622 is protrudingly provided on the surface of the threaded column 62 facing away from the second workpiece 6. For example, the limiting protrusion 622 can be provided as a cylindrical structure.

[0074] The fastening assembly includes a stopper 1, an operating member and an elastic member 4. The fastening assembly has an axial direction Z and a circumferential direction X surrounding the axial direction Z. The stopper 1 is provided with a threaded hole 11 and a receiving cavity 12. The threaded hole 11 and the receiving cavity 12 can be arranged in sequence in the axial direction Z, and the threaded hole 11 and the receiving cavity 12 are connected to each other. The inner circumferential surface of the threaded hole 11 is provided with an internal thread.

[0075] The accommodating cavity 12 is configured to accommodate an operating member. The operating member is fixedly installed in the accommodating cavity 12. The operating member is circumferentially fixed to the limiting member 1 so that the operating member can drive the limiting member 1 to rotate. The operating member includes a limiting end 33. An anti-loosening groove 34 is provided on the end surface of the limiting end 33 facing the threaded hole 11. The anti-loosening groove 34 includes a sliding end 344 and a buckle section 340. The anti-loosening groove 34 has a recessed depth difference, that is, the recessed depth of the buckle end 340 is greater than the recessed depth of the sliding end 344. The buckle end 340 has a recessed wall surface.

[0076] The external thread of the threaded column 62 is configured to be screwed into the internal thread of the threaded hole 11. The first workpiece 5 is provided with a through hole 50 for the limiter 1 to pass through. The limiter 1 passes through the through hole 50, and the threaded hole 11 is sleeved on the threaded column 62. The threaded column 62 passes through the threaded hole 11 and cooperates with the limit end 33. The limit protrusion 622 can rotate relatively to slide into the slide-in end 344, and continue to slide until it falls into and snaps into the snap end 340, so that the threaded hole 11 and the threaded column 62 are locked. At this time, the concave wall surface of the snap end 340 away from the slide-in end 344 is a stop surface. The force of the limit protrusion 622 blocking the stop surface can give the user a feel of use, indicating that the threaded hole 11 and the threaded column 62 have been locked, and can prevent the limit protrusion 622 from continuing to slide relative to each other during transition, resulting in damage such as thread slippage. At the same time, since there is a difference in the recessed depth between the sliding end 344 and the buckle section 340 , the step formed by the difference and the stop surface together prevent the limiting protrusion 622 from rotating relative to the clockwise and counterclockwise direction, thereby preventing the limiting protrusion 622 from sliding out of the buckle end 340 .

[0077] In this way, when the threaded column 62 of the second workpiece 6 is locked with the threaded hole 11 of the stopper 1, the stopper protrusion 622 falls into and is buckled in the buckle end 340. Since the recessed depth of the buckle end 340 is greater than the recessed depth of the slide-in end 344, if the stopper protrusion 622 wants to slide out from the buckle end 340, whether it slides out through the slide-in end 344 or directly slides out from the end of the buckle end 340 away from the slide-in end 344, it must overcome the obstruction of the recessed wall of the buckle end 340, and it needs to overcome a large obstruction resistance, thereby avoiding the loosening of the threaded connection caused by the relative rotation force of the workpieces during normal use, thereby preventing the threaded column 62 from being separated from the threaded hole 11, and ensuring the installation position of the stopper 1. The stopper 1 with a guaranteed installation position can reliably install the first workpiece 5 on the second workpiece 6, so that the first workpiece 5 and the second workpiece 6 are not easy to separate.

[0078] When the cookware needs to be disassembled, the rotational force of the screwing operating member can be continuously increased to overcome the depth difference between the sliding end 344 and the buckle end 340, so that the limiting protrusion 622 slides out from the sliding end 344 to loosen the fastener, thereby disassembling the first workpiece and the second workpiece, which is convenient for disassembly.

[0079] The specific structure of the anti-loosening groove 34 can be set as required.

[0080] For an alternative example, see Figure 6 and Figure 7 , the anti-loosening groove 34 is an arc-shaped groove with an inclined bottom surface. Since the bottom surface of the anti-loosening groove 34 is inclined, the anti-loosening groove 34 has a recessed depth difference in the extension direction of the anti-loosening groove 34. The buckle end 340 and the sliding end 344 are respectively located at the two ends of the anti-loosening groove 34, and the recessed depth of the buckle end 340 is greater than the recessed depth of the sliding end 344. For example, from the deep end of the anti-loosening groove 34 toward the other end, the recessed depth of the anti-loosening groove 34 can be gradually reduced. In this example, in order to achieve reliable thread anti-loosening, a plurality of anti-loosening grooves 34 can be provided on the end surface of the limit end 33 facing the threaded hole 11. The plurality of anti-loosening grooves 34 are spaced apart in the circumferential direction of the limit end 33.

[0081] In addition, in other optional examples, the anti-loosening groove 34 can also be set as a spiral groove with a bottom surface extending in a spiral slope shape. Since the bottom surface of the anti-loosening groove 34 is in a spiral slope shape, the anti-loosening groove 34 has a recessed depth difference in the extending direction of the anti-loosening groove 34. The buckle end 340 and the slide-in end 344 are respectively located at the two ends of the anti-loosening groove 34, and the recessed depth of the buckle end 340 is greater than the recessed depth of the slide-in end 344.

[0082] Since the anti-loosening groove 34 has a recessed depth difference, the buckle end 340 and the sliding end 344 are respectively located at the two ends of the anti-loosening groove 34, so the limiting protrusion 622 can neither easily slide out from the sliding end 344 nor easily slide out from the end directly away from the buckle end 340 and the sliding end 344. In the normal use of the cooker, the limiting protrusion 622 will not be rotated out of the anti-loosening groove 34 by unintentional rotation, thereby avoiding the loosening of the threaded connection.

[0083] The sliding end 344 extends toward the buckle section 340 to form an anti-loosening groove, and at least one step 342 is formed between the sliding end 344 and the buckle end 340. The step 342 can smoothly connect the sliding end 344 and the buckle end 340. For example, the bottom surface 342 of the anti-loosening groove 34 may include one or more of an inclined surface and a curved surface. Such a configuration facilitates the limiting protrusion 622 to relatively rotate to slide into the sliding end 344, and continue to slide until it falls into and is buckled in the buckle end 340.

[0084] See also Figure 1 , Figure 5 and Figure 6 The intersection of the accommodating cavity 12 and the threaded hole 11 is set as a step surface 122, and the limiting end 33 abuts against the step surface 122. An elastic member 4 is also provided in the accommodating cavity 12, and the elastic member 4 can produce elastic deformation so that the limiting end 33 and the step surface 122 can always keep abutting against each other.

[0085] The structure of the operating member can be set as required. Optionally, as shown in the figure, the operating member includes a knob cap 2, which is detachably installed in the accommodating cavity 12. The two ends of the elastic member 4 elastically abut against the knob cap 2 and the limit end 33 respectively, so as to produce elastic deformation so that the limit end 33 and the step surface 122 can always keep abutting against each other.

[0086] Furthermore, a first slot 14 and a first hook 24 may be provided on the limiting member 1 and the knob cap 2, respectively. The first slot 14 is provided on the inner wall of the accommodating chamber 12. The first slot 14 is communicated with the accommodating chamber 12. The first hook 24 is elastically provided on the outer wall of the knob cap 2. When the first hook 24 is subjected to an external force, it can produce elastic deformation so that the knob cap 2 can enter or escape from the accommodating chamber 12, and the elastic force is released when the external force disappears. The knob cap 2 can move axially along the accommodating chamber 12 until the first hook 24 is limited in the first slot 14, so that the knob cap 2 is circumferentially fixed to the limiting member 1. The first slot 14 can stop the first hook 24 to prevent the knob cap 2 from escaping from the accommodating chamber 12.

[0087] The knob cap 2 also includes a handle portion 26 extending to be exposed outside the accommodating cavity 12. The handle portion 26 can be operated by a user to rotate the knob cap 2 and thereby rotate the operating member. The limiting member 1 and the handle portion 26 are respectively provided with a positioning hole 182 and a positioning column 262. The limiting member 1 may be provided with a flange portion 18, the flange portion 18 is arranged opposite to the handle portion 26, and the positioning hole 182 is arranged on the flange portion 18. The positioning column 262 is protrudingly arranged on the handle portion 26. The positioning column 262 is inserted into the positioning hole 182 to fix the knob cap 2 and the limiting member 1 circumferentially.

[0088] As shown in the figure, the operating member further comprises a lock core 3, and the limiting end 33 is the end surface of the lock core 3. The knob cap 2 is provided with a receiving hole 21, and both the lock core 3 and the elastic member 4 can be installed in the receiving hole 21.

[0089] The lock core 3 and the knob cap 2 may be provided with a second hook 32 and a second slot 22, respectively. The second slot 22 is provided on the inner wall of the receiving hole 21. The second hook 32 is provided on the outer wall of the lock core 3. The second hook 32 is limited in the second slot 22, so that the lock core 3 and the knob cap 2 are circumferentially fixed, and the lock core 3 can axially reciprocate in the receiving hole 21.

[0090] When the operating member drives the limiting member 1 to rotate, the lock core 3 can axially reciprocate in the accommodating hole 21 , and the elastic member 4 is elastically deformed so that the limiting end 33 and the step surface 122 can always keep contacting each other.

[0091] The specific structure of the elastic member 4 can be set as needed. In this embodiment, the elastic member 4 may include a spring arranged between the lock core 3 and the knob cap 2. One end of the spring abuts against the lock core 3 and the other end abuts against the knob cap 2. The spring can be compressed and deformed so that the limit end 33 and the step surface 122 can be kept against each other. At least part of the structure of the spring can be accommodated in the accommodating hole 21 of the lock core 3.

[0092] like Figure 8 As shown, when the cookware needs to be disassembled, the rotational force of the screwing operating member can be continuously increased to overcome the depth difference of the depression between the sliding end 344 and the snap end 340, so that the limiting protrusion 622 slides out from the sliding end 344 and the limiting protrusion 622 is separated from the snap end 340, so that the fastening assembly and the second workpiece 6 can be disassembled and separated, and the first workpiece 5 and the second workpiece 6 can be disassembled and separated, and the disassembly is convenient without the aid of tools.

[0093] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A fastening assembly for connecting two workpieces, wherein one of the workpieces is provided with a threaded column (62), and a limiting protrusion (622) is provided on the threaded column (62), characterized in that: The fastening assembly comprises: A limiting member (1), the limiting member (1) being provided with a threaded hole (11) and a receiving cavity (12) which are connected to each other; and an operating member, the operating member being fixedly mounted in the accommodating cavity (12), the operating member comprising a knob cap (2) and a lock core (3), the knob cap (2) being circumferentially fixed to the limiting member (1), the knob cap (2) being provided with an accommodating hole (21), the lock core (3) being circumferentially fixed to the knob cap (2) and being capable of axially reciprocating movement in the accommodating hole (21); The lock core (3) comprises a limit end (33), an end surface of the limit end (33) facing the threaded hole (11) is provided with an anti-loosening groove (34), the anti-loosening groove (34) comprises a sliding end (344) and a buckle end (340), and the recessed depth of the buckle end (340) is greater than the recessed depth of the sliding end (344); The intersection of the accommodating cavity (12) and the threaded hole (11) is a step surface (122), and the limiting end (33) abuts against the step surface (122). An elastic member (4) is also provided in the accommodating cavity (12), and the elastic member (4) is installed in the accommodating hole (21). Two ends of the elastic member (4) elastically abut against the knob cap (2) and the limiting end (33) respectively. The threaded hole (11) is sleeved on the threaded column (62), the threaded column (62) passes through the threaded hole (11) and cooperates with the limiting end (33), and the limiting protrusion (622) can rotate relatively to slide into the sliding end (344), and continue to slide until it falls into and is locked on the locking end (340) to lock the threaded hole (11) and the threaded column (62).

2. The fastening assembly according to claim 1, characterized in that: The anti-loosening groove (34) is an arc-shaped groove with an inclined bottom surface or a spiral groove extending in a spiral slope shape, and the sliding end (344) and the buckle end (340) are respectively located at two ends of the anti-loosening groove (34).

3. The fastening assembly according to claim 1, characterized in that: The sliding-in end (344) extends toward the buckle end (340) to form the anti-loosening groove (34), and at least one step (342) is formed between the sliding-in end (344) and the buckle end (340), and the step (342) smoothly connects the sliding-in end (344) and the buckle end (340).

4. The fastening assembly according to claim 1, characterized in that: The knob cap (2) is detachably mounted in the accommodating cavity (12).

5. The fastening assembly according to claim 4, characterized in that: The limiting member (1) and the knob cap (2) are respectively provided with a first clamping groove (14) and a first clamping hook (24); the first clamping groove (14) is communicated with the accommodating cavity (12), and the first clamping hook (24) is elastically arranged on the outer wall of the knob cap (2); The knob cap (2) moves axially along the accommodating cavity (12) until the first hook (24) is limited in the first groove (14), so that the knob cap (2) and the limiting member (1) are circumferentially fixed.

6. The fastening assembly according to claim 4, characterized in that: The knob cap (2) further comprises a handling portion (26) extending to be exposed outside the accommodating cavity (12); The limiting member (1) and the handling portion (26) are respectively provided with a positioning hole (182) and a positioning column (262); The positioning column (262) penetrates into the positioning hole (182) so that the knob cap (2) and the limiting member (1) are circumferentially fixed.

7. The fastening assembly according to claim 1, characterized in that: The lock core (3) and the knob cap (2) are respectively provided with a second hook (32) and a second slot (22); The second hook (32) is limited in position in the second slot (22) so that the lock core (3) and the knob cap (2) are circumferentially fixed, and the lock core (3) can axially reciprocate in the accommodating hole (21).

8. A cookware, comprising a first workpiece (5) and a second workpiece (6) to be connected to each other, characterized in that: The cooker also includes: The fastening assembly according to any one of claims 1 to 7; Wherein, the second workpiece (6) is provided with a threaded column (62), and the threaded column (62) is provided with a limiting protrusion (622); The limiting member (1) mounts the first workpiece (5) on the second workpiece (6).

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