Lockable bed frame

Abstract

The utility model relates to life furniture technical field, concretely disclose a kind of lockable bite bed sheet row skeleton and bed frame, comprising: row skeleton body, the row skeleton body is used to provide upward support to mattress;Several occlusal components, each occlusal component is arranged at the four around side of the row skeleton body;Wherein, the occlusal component has the occlusal state of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of the edge position of

Description

Technical Field

[0001] This utility model relates to the field of living furniture technology, and in particular to a lockable bed sheet frame and bed frame. Background Technology

[0002] During use, traditional mattresses are prone to bed sheets shifting longitudinally or laterally due to friction and inertia generated by human movement. This can cause the sheets to wrinkle, slip off, or even detach completely from the mattress. This not only affects sleep comfort and increases the frequency of nighttime bed-making, but also poses potential safety hazards, especially for the elderly and patients with limited mobility.

[0003] Existing mattress support frames generally only provide support for the mattress and cannot restrain the bed sheet. Therefore, this invention aims to improve existing mattress support frames to enable them to restrain the bed sheet, thereby solving the problem of existing bed sheets easily sliding and shifting.

[0004] The information disclosed in this background section is included only to enhance the understanding of the context of this disclosure, and therefore may contain information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] One objective of this invention is to provide a lockable bed sheet frame and bed frame that can effectively solve the problem of existing bed sheets easily sliding and shifting.

[0006] To achieve the above objectives, on the one hand, this utility model provides a lockable bed sheet frame, comprising:

[0007] A slatted frame body, the slatted frame body being used to provide upward support for the mattress;

[0008] A plurality of occlusal components, each of the occlusal components being arranged on the four sides of the slat frame body;

[0009] The engagement component has an engagement state where it engages and clamps the edge of the sheet; and a release state where it releases the edge of the sheet.

[0010] Optionally, the slat frame body includes a slat frame body and a plurality of slat support bars fixedly installed in the slat frame body;

[0011] The outer side of each side of the slatted frame is provided with a number of interlocking components at equal intervals.

[0012] Optionally, the occlusal assembly includes:

[0013] A fixed biting part is fixedly installed on the four sides of the slat frame. The upper part of the fixed biting part is provided with a plurality of first biting teeth, and a first tooth root groove is provided between two adjacent first biting teeth.

[0014] The rotating biting part has its lower part hinged to the fixed biting part via a first rotating shaft, and its upper part is provided with a plurality of second biting teeth for embedding in each of the first tooth root grooves. A second tooth root groove is provided between two adjacent second biting teeth for the corresponding first biting teeth to be embedded in.

[0015] Optionally, the end face of each of the said biting teeth is an outwardly convex arc surface.

[0016] Optionally, the fixing engagement portion is provided with a fastening hole for the fastener to pass through.

[0017] Optionally, the engagement assembly further includes a rotating buckle plate, the middle part of which is hinged to the rotating engagement part via a second pivot.

[0018] The lower end of the fixed engagement part is provided with a fixed abutment part protruding toward the rotating engagement part, and the lower end of the rotating buckle plate protrudes toward the fixed abutment part to form a buckle plate abutment part;

[0019] When the rotating buckle plate rotates upward to its limit position, the buckle plate abutting part abuts against the fixed abutting part, so that the fixed biting part and the rotating biting part maintain the biting state.

[0020] Optionally, a limiting protrusion is provided on the side of the rotating engagement portion away from the fixed engagement portion;

[0021] A clearance notch is provided directly below the limiting protrusion;

[0022] The upper end of the rotating buckle plate extends through the clearance notch to the side of the rotating engagement part away from the fixed engagement part, and a protrusion abutment hole is provided at the position corresponding to the limiting protrusion.

[0023] When the rotating buckle plate rotates upward to its limit position, the limiting protrusion is inserted into the protrusion abutment hole, and the circumferential surface of the limiting protrusion abuts against the hole wall of the protrusion abutment hole, so as to maintain the abutment state of the buckle plate abutment part and the fixed abutment part.

[0024] Optionally, the fixing engagement portion is provided with a limiting boss extending obliquely above the buckle plate abutting portion, which is used to abut against the end face of the buckle plate abutting portion when the rotating buckle plate rotates downward, so that the rotating buckle plate moves outward relative to the fixing engagement portion.

[0025] Optionally, the rotating engagement part is provided with a linkage boss extending above the buckle plate abutment part, which is used to abut against the top surface of the buckle plate abutment part when the rotating buckle plate rotates downward, so that the rotating engagement part moves downward synchronously with the rotating buckle plate.

[0026] On the other hand, a bed frame is provided, including a bed frame and a lockable bed sheet frame mounted on the bed frame.

[0027] The beneficial effects of this utility model are as follows: It provides a lockable bed sheet frame and bed frame, and the working process is as follows:

[0028] (1) Bed sheet installation stage:

[0029] At the beginning, keep all occlusal components in the loose state;

[0030] The user places the mattress on top of the lockable sheet frame and bed frame, then lays the center of the sheet on the mattress, and then pulls the edges of the sheet down to the bottom of the frame and into the corresponding locking components.

[0031] By applying slight pressure, the bite assembly switches from a released state to a biting state, using its biting force to secure the edge of the sheet.

[0032] (2) Usage phase:

[0033] Once the edges of the sheet are locked in place, the various interlocking components form a multi-point fixing structure. When a person moves on the mattress, the frictional and inertial forces acting on the sheet are transmitted to the clamping points, but the interlocking components counteract these external forces with continuous biting force, preventing the sheet from shifting entirely or partially.

[0034] (3) Disassembly and adjustment stage:

[0035] Users can operate the interlocking components to release the edge of the sheet, making it easier to change or adjust the position of the sheet.

[0036] Therefore, the lockable bed sheet frame and bed frame provided by this utility model can effectively solve the problem of existing bed sheets easily sliding and shifting. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1A schematic diagram of the structure of the lockable single-row bed frame provided in the embodiment;

[0039] Figure 2 A schematic diagram of the occlusal assembly provided in the embodiment;

[0040] Figure 3 This is a schematic diagram illustrating the opening process of the occlusal assembly provided in the embodiment.

[0041] In the picture:

[0042] 1. Slatted frame body; 101. Slatted frame frame body; 102. Slatted frame support strip;

[0043] 2. Occlusal components;

[0044] 201. Fixed engagement part; 2011. First engagement tooth; 2012. First tooth root groove; 2013. Fastening hole; 2014. First rotating shaft; 2015. Fixed abutment part; 2016. Limiting boss;

[0045] 202. Rotating engagement part; 2021. Second engagement tooth; 2022. Second tooth root groove; 2023. Limiting protrusion; 2024. Linkage boss; 2025. Avoidance notch;

[0046] 203. Rotating buckle plate; 2031. Buckle plate abutment part; 2032. Second rotating shaft; 2033. Protruding post abutment hole. Detailed Implementation

[0047] In this utility model, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this utility model. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0048] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit the invention.

[0049] In the description of this utility model, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" logical relationship.

[0050] In this invention, terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy, or order between these entities or operations.

[0051] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this invention is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a series of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0052] Similar to the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0053] In the description of the embodiments of this utility model, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the convenience of describing the specific embodiments of this utility model or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0054] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this utility model, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this utility model pertains, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0055] This embodiment provides a bed frame, including a bed frame and a lockable sheet frame installed on the bed frame, which can effectively solve the problem of existing sheets easily sliding and shifting.

[0056] See Figure 1 Lockable bed sheet frame includes:

[0057] The slatted frame body 1 is used to provide upward support for the mattress;

[0058] A plurality of occlusal components 2, each of the occlusal components 2 being arranged on the four sides of the slat frame body 1;

[0059] The biting component 2 has a biting state where it clamps the edge of the bed sheet with teeth, and a loosening state where it releases the edge of the bed sheet.

[0060] The locking bed sheet frame and bed frame provided by this utility model work as follows:

[0061] (1) Bed sheet installation stage:

[0062] At the beginning, keep all occlusal components 2 in the loose state;

[0063] The user places the mattress on top of the lockable sheet frame and bed frame, then lays the center area of ​​the sheet on the mattress, and then pulls the edge of the sheet down to the bottom area of ​​the frame body 1 and embeds it into the corresponding locking component 2.

[0064] By applying slight pressure, the bite component 2 switches from the loose state to the bite state, using its biting force to fix the edge of the bed sheet.

[0065] (2) Usage phase:

[0066] After the edges of the bed sheet are locked in place, the interlocking components 2 form a multi-point fixing structure. When a person moves on the mattress, the frictional and inertial forces on the bed sheet are transmitted to the clamping points, but the interlocking components 2 counteract these external forces through continuous biting force, preventing the bed sheet from shifting as a whole or in part.

[0067] (3) Disassembly and adjustment stage:

[0068] Users can operate the interlocking component 2 to release the edge of the sheet, making it easier to change or adjust the position of the sheet.

[0069] Therefore, the lockable bed sheet frame and bed frame provided by this utility model can effectively solve the problem of existing bed sheets easily sliding and shifting.

[0070] In this embodiment, the bed sheet frame body 1 includes a bed sheet frame 101 and a plurality of rib support strips 102 fixedly installed within the bed sheet frame 101; wherein, a plurality of interlocking components 2 are evenly spaced on the outer surface of each side of the bed sheet frame 101. The arrangement of the interlocking components 2 ensures that the edge of the bed sheet is subjected to uniform force, avoiding local stress concentration that could lead to damage to the bed sheet or insecure fixation, thereby improving the reliability of the bed sheet fixation and the support stability of the bed sheet frame body 1.

[0071] See Figure 2 and Figure 3 The following is a detailed description of the structure of the occlusal component 2.

[0072] The engagement component 2 includes:

[0073] A fixed biting part 201 is fixedly installed on the four sides of the slat frame 101. The upper part of the fixed biting part 201 is provided with a plurality of first biting teeth 2011, and a first tooth root groove 2012 is provided between two adjacent first biting teeth 2011.

[0074] The rotating biting part 202 has its lower part hinged to the fixed biting part 201 via a first rotating shaft 2014, and its upper part is provided with a plurality of second biting teeth 2021 for embedding in each of the first tooth root grooves 2012. A second tooth root groove 2022 is provided between two adjacent second biting teeth 2021 for the corresponding first biting teeth 2011 to be embedded.

[0075] The bite assembly 2 provided in this embodiment provides a strong bite force and a uniform clamping effect through the interlocking design of the first bite tooth 2011 and the second bite tooth 2021, ensuring that the bed sheet is firmly fixed and preventing slippage; the hinge structure makes operation simple and switching flexible.

[0076] Optionally, the end faces of each of the bite teeth are convex arc surfaces. The arc surface design avoids damage to the sheet fibers from sharp corners, extending the sheet's lifespan; at the same time, the arc surface provides a smooth contact surface, making the sheet easier to clamp and release, reducing operational resistance.

[0077] In this embodiment, the fixing engagement part 201 is provided with a fastening hole 2013 for a fastener to pass through. The fastener can be a screw, which can pass through the fastening hole 2013 to fix the fixing engagement part 201 onto the side of the slat frame 101. In some other embodiments, the fixing engagement part 201 can also be fixed by other methods such as adhesive or snap-fit ​​installation.

[0078] In this embodiment, the interlocking component 2 further includes a rotating buckle plate 203, the middle part of which is hinged to the rotating interlocking part 202 via a second rotating shaft 2032;

[0079] The lower end of the fixed engagement part 201 is provided with a fixed abutment part 2015 protruding toward the rotating engagement part 202, and the lower end of the rotating buckle plate 203 protrudes toward the fixed abutment part 2015 to form a buckle plate abutment part 2031.

[0080] When the rotating buckle 203 rotates upward to its limit position, the buckle abutting part 2031 abuts against the fixed abutting part 2015, so that the fixed engaging part 201 and the rotating engaging part 202 maintain the engaging state.

[0081] Optionally, the rotating engagement part 202 is provided with a limiting protrusion 2023 on the side away from the fixed engagement part 201;

[0082] An avoidance notch 2025 is provided directly below the limiting protrusion 2023;

[0083] The upper end of the rotating buckle plate 203 extends through the clearance notch 2025 to the side of the rotating engagement part 202 away from the fixed engagement part 201, and a protrusion abutment hole 2033 is provided at the position corresponding to the limiting protrusion 2023.

[0084] When the rotating buckle plate 203 rotates upward to its limit position, the limiting protrusion 2023 is inserted into the protrusion abutment hole 2033, and the circumferential surface of the limiting protrusion 2023 abuts against the hole wall of the protrusion abutment hole 2033, so as to maintain the abutment state of the buckle plate abutment part 2031 and the fixed abutment part 2015.

[0085] Furthermore, the fixed engagement portion 201 is provided with a limiting boss 2016 extending obliquely above the buckle plate abutment portion 2031, which is used to abut against the end face of the buckle plate abutment portion 2031 when the rotating buckle plate 203 rotates downward, so that the rotating buckle plate 203 moves outward relative to the fixed engagement portion 201.

[0086] Furthermore, the rotating engagement part 202 is provided with a linkage boss 2024 protruding above the buckle plate abutment part 2031, which is used to abut against the top surface of the buckle plate abutment part 2031 when the rotating buckle plate 203 rotates downward, so that the rotating engagement part 202 moves downward synchronously with the rotating buckle plate 203.

[0087] Before unfastening, the limiting protrusion 2023 is inserted into the protrusion abutment hole 2033, and the circumferential surface of the limiting protrusion 2023 abuts against the hole wall of the protrusion abutment hole 2033 to maintain the abutting state of the buckle plate abutting part 2031 and the fixed abutting part 2015. At this time, if no external force is applied to buckle the buckle plate 203 outward, under the abutting force of the buckle plate abutting part 2031 and the fixed abutting part 2015, the two interlocking parts will tightly bite the edge of the bed sheet.

[0088] When unfastening, the buckle plate 203 needs to be rotated outward to disengage the limiting protrusion 2023 from the protrusion abutment hole 2033. At this time, the buckle plate abutment part 2031 will rotate to be slightly higher than the fixed abutment part 2015. After losing the abutting force between the buckle plate abutment part 2031 and the fixed abutment part 2015, the biting force between the two biting parts has been basically removed.

[0089] Continue to rotate the rotating buckle 203 downwards. The end face of the buckle abutment part 2031 of the rotating buckle 203 will first rotate to the bottom face of the abutment limiting boss 2016. Under the abutment of the limiting boss 2016, the rotating buckle 203 will drive the rotating engagement part 202 to rotate outward a little distance relative to the fixed engagement part 201. At this time, the two engagement parts will no longer exert a biting force on the bed sheet.

[0090] Continue to rotate the rotating buckle 203 downwards. The buckle abutment part 2031 disengages from the functional area of ​​the limiting boss 2016 and rotates outwards relative to the rotating engagement part 202 until the top surface of the buckle abutment part 2031 abuts against the linkage boss 2024. At this time, continue to rotate the rotating buckle 203 downwards. The rotating buckle 203 will drive the rotating engagement part 202 to rotate downwards relative to the fixed engagement part 201, so that the two engagement parts are fully opened.

[0091] After inserting or removing the edge of the sheet between the two interlocking parts, rotate the buckle plate 203 upwards until the limiting protrusion 2023 is inserted into the protrusion abutment hole 2033 again.

[0092] In summary, the lockable bed sheet frame and bed frame provided in this embodiment have the following advantages:

[0093] ①The hinged design of the fixed biting part 201 and the rotating biting part 202, as well as the mutual interlocking of the first biting tooth 2011 and the second biting tooth 2021, provides a strong biting force and a uniform clamping effect, ensuring that the bed sheet is firmly fixed and preventing slippage.

[0094] ② Through the abutting mechanism of the rotating buckle 203, the fixed abutting part 2015 and the buckle abutting part 2031, the fixed biting part 201 and the rotating biting part 202 are kept in a biting state when the rotating buckle 203 is rotated upward to the limit position, so as to prevent accidental loosening.

[0095] ③ By cooperating with the limiting protrusion 2023 and the protrusion abutment hole 2033, the buckle plate 203 is inserted and abutted when it rotates upward, maintaining the abutment state between the buckle plate abutment part 2031 and the fixed abutment part 2015, thus enhancing the stability of the engagement state.

[0096] ④ By using the limiting boss 2016 on the fixed engagement part 201, when the rotating buckle 203 rotates downward, it abuts against the end face of the buckle abutment part 2031, so that the rotating buckle 203 moves outward relative to the fixed engagement part 201, which facilitates the initial release of the engagement force.

[0097] ⑤ By rotating the linkage boss 2024 on the engagement part 202, the rotating buckle 203 rotates downward and abuts against the top surface of the buckle abutment part 2031, so that the engagement part 202 rotates downward synchronously with the rotating buckle 203, thus achieving smooth opening of the engagement part and saving effort in operation.

[0098] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A lockable bed sheet frame, characterized in that, include: The slatted frame body (1) is used to provide upward support to the mattress; A plurality of occlusal components (2), each of the occlusal components (2) being arranged on the four sides of the slatted frame body (1); The biting component (2) has a biting state in which the teeth bite and clamp the edge of the sheet; and a loosening state in which the edge of the sheet is released.

2. The lockable bite-resistant single-row bed frame according to claim 1, characterized in that, The slat frame body (1) includes a slat frame frame (101) and a plurality of slat support bars (102) fixedly installed in the slat frame frame (101). Among them, a number of the biting components (2) are evenly spaced on the outer side of each side of the slat frame (101).

3. The lockable bite-resistant bed frame according to claim 2, characterized in that, The occlusal assembly (2) includes: A fixed biting part (201) is fixedly installed on the four sides of the slat frame frame (101). The upper part of the fixed biting part (201) is provided with a plurality of first biting teeth (2011), and a first tooth root groove (2012) is provided between two adjacent first biting teeth (2011). The rotating engagement part (202) has its lower part hinged to the fixed engagement part (201) via a first rotating shaft (2014), and its upper part is provided with a plurality of second engagement teeth (2021) for embedding in each of the first tooth root grooves (2012). A second tooth root groove (2022) is provided between two adjacent second engagement teeth (2021) for the corresponding first engagement teeth (2011) to be embedded.

4. The lockable bite-resistant single-row bed frame according to claim 3, characterized in that, The end face of each of the aforementioned biting teeth is an outwardly convex arc surface.

5. The lockable single-row bed frame according to claim 3, characterized in that, The fixed engagement part (201) is provided with a fastening hole (2013) for fasteners to pass through.

6. The lockable bite-resistant single-row bed frame according to claim 3, characterized in that, The engagement assembly (2) further includes a rotating buckle plate (203), the middle part of which is hinged to the rotating engagement part (202) via a second pivot (2032); The lower end of the fixed engagement part (201) is provided with a fixed abutment part (2015) protruding toward the rotating engagement part (202), and the lower end of the rotating buckle (203) protrudes toward the fixed abutment part (2015) to form a buckle abutment part (2031). When the rotating buckle (203) rotates upward to its limit position, the buckle abutting part (2031) abuts against the fixed abutting part (2015) so that the fixed biting part (201) and the rotating biting part (202) maintain the biting state.

7. The lockable bite-resistant bed frame according to claim 6, characterized in that, The rotating engagement part (202) is provided with a limiting protrusion (2023) on the side away from the fixed engagement part (201). A clearance notch (2025) is provided directly below the limiting protrusion (2023); The upper end of the rotating buckle (203) extends through the clearance notch (2025) to the side of the rotating engagement part (202) away from the fixed engagement part (201), and a protrusion abutment hole (2033) is provided at the position corresponding to the limiting protrusion (2023). When the rotating buckle plate (203) rotates upward to the limit position, the limiting protrusion (2023) is inserted into the protrusion abutment hole (2033), and the circumferential surface of the limiting protrusion (2023) abuts against the hole wall of the protrusion abutment hole (2033) to maintain the abutment state of the buckle plate abutment part (2031) and the fixed abutment part (2015).

8. The lockable bite-resistant bed frame according to claim 6, characterized in that, The fixed engagement part (201) is provided with a limiting boss (2016) extending obliquely above the buckle abutment part (2031), which is used to abut against the end face of the buckle abutment part (2031) when the rotating buckle (203) rotates downward, so that the rotating buckle (203) moves outward relative to the fixed engagement part (201).

9. The lockable bite-resistant bed frame according to claim 6, characterized in that, The rotating engagement part (202) is provided with a linkage boss (2024) protruding above the buckle plate abutment part (2031), which is used to abut against the top surface of the buckle plate abutment part (2031) when the rotating buckle plate (203) rotates downward, so that the rotating engagement part (202) moves downward synchronously with the rotating buckle plate (203).

10. A bed frame, characterized in that, Includes a bed frame and a lockable bed sheet frame as described in any one of claims 1-9, mounted on the bed frame.

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