Automatic lock falling device, folding frame and sofa bed

Abstract

The utility model provides an automatic lock falling device, folding frame and sofa bed belong to furniture technical field. The automatic lock falling device of the utility model includes the lock hook, spring, limit block, hook post and limit push column, the lock hook is rotatably connected on the second connecting piece, the spring is located between the second connecting piece and the lock hook, the limit block is located on the second connecting piece, and the hook post and the limit push column are located on the first turnover piece, the limit block limits the angle of the lock hook rotating to the hook post side, the limit push column limits the angle of the lock hook rotating to the side away from the hook post, and the limit push column promotes the lock hook to the hook post side when the first turnover piece and the second connecting piece rotate away from each other. The utility model can automatically fall lock, ensure the structural stability of sofa bed unfolded state, guarantee the use safety.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and in particular to an automatic locking device, a folding frame, and a sofa bed. Background Technology

[0002] Sofa beds are popular in many households due to their flexibility; they can be used as a bed when unfolded and as a sofa when folded. In sofa mode, the structure is relatively stable and difficult to unfold without external force. However, in bed mode, if a person is positioned on the inner side of the two bed panels, the bed may flip over, trapping the person and posing a safety hazard.

[0003] Therefore, existing sofa beds are generally equipped with locks to secure their structure when used as a bed. However, these locks usually require manual operation and are easy to forget to lock, which can lead to safety hazards. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art and provide an automatic locking device, a folding frame and a sofa bed, which can automatically lock to ensure the structural stability of the sofa bed in the unfolded state and ensure safety in use.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] An automatic locking device is applied between a first flipping member and a second connecting member that are rotatably connected to each other. The automatic locking device includes a locking hook, a spring, a limiting block, a hook post, and a limiting push post. The locking hook is rotatably connected to the second connecting member. The spring is located between the second connecting member and the locking hook. The limiting block is located on the second connecting member. The hook post and the limiting push post are located on the first flipping member. The limiting block restricts the angle at which the locking hook rotates towards the hook post. The limiting push post restricts the angle at which the locking hook rotates away from the hook post. When the first flipping member and the second connecting member rotate in opposite directions, the limiting push post pushes the locking hook towards the hook post.

[0007] Preferably, the locking hook includes a main body, a rotating connecting part and a hook part respectively disposed at opposite ends of the main body, and spring connecting posts are provided on the side of the main body and the second connecting member.

[0008] Preferably, the rotating connection part has a straight edge on its side end that matches the limiting block.

[0009] Preferably, the width of the main body portion near the hook portion is smaller than the width near the rotating connection portion.

[0010] Preferably, the end of the hook facing away from the main body is provided with a guide bevel that matches the hook post.

[0011] Preferably, the back of the lock hook is provided with an unlocking plate on the side facing away from the second connector.

[0012] Preferably, the back of the lock hook is provided with a guide portion that cooperates with the limiting push post on the side of the unlocking plate away from the spring.

[0013] This utility model also provides a folding frame, including a first connecting member, a second connecting member, a third connecting member, a first flipping member, and a second flipping member. The two ends of the first flipping member are rotatably connected to the first end of the first connecting member and the first end of the second connecting member, respectively. The two ends of the second flipping member are rotatably connected to the second end of the first connecting member and the second end of the second connecting member, respectively. The first flipping member is provided with a first support portion, and the second flipping member is provided with a second support portion. The two ends of the third connecting member are rotatably connected to the first support portion and the second support portion, respectively. An automatic locking device as described above is provided between the first flipping member and the second connecting member.

[0014] This utility model also provides a sofa bed, including a base, a first support frame and a second support frame, and a folding frame as described above. The first connector is connected to the base, the second connector is connected to the first support frame, and the third connector is connected to the second support frame.

[0015] The advantages of this utility model are:

[0016] By utilizing the elasticity of the spring, the locking hook can hook onto the hook post after passing it, thus completing the automatic locking and preventing safety hazards caused by forgetting to lock.

[0017] After the lock hook is manually opened, during the process of the first flipping part and the second connecting part rotating and unfolding, the lock hook will be pushed to the upper locking position by the limiting push post. That is, after the lock hook is opened, the lock hook can automatically reset to complete the next automatic locking.

[0018] The entire device has a simple structure, is easy to install, and has a wide range of applications. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the locked state of an automatic locking device provided in an embodiment of this specification;

[0020] Figure 2 This is a structural diagram of an automatic locking device in its unlocked state, provided in an embodiment of this specification.

[0021] Figure 3 This is a structural schematic diagram of the reset process state of an automatic locking device provided in an embodiment of this specification;

[0022] Figure 4 This is a schematic diagram of the structure of the locking hook provided in the embodiments of this specification;

[0023] Figure 5This is a schematic diagram of a folding frame in its unfolded and locked state, provided in an embodiment of this specification.

[0024] Figure 6 This is a structural diagram illustrating the unfolded and unlocked state of a folding frame as provided in an embodiment of this specification.

[0025] Figure 7 This is a structural diagram illustrating the unlocking and folding process of a folding frame, as provided in an embodiment of this specification.

[0026] Figure 8 This is a structural schematic diagram of a sofa bed provided as an embodiment of the present specification;

[0027] In the diagram: 1-Locking hook; 11-Main body; 12-Rotating connecting part; 121-Straight edge; 13-Hook part; 131-Guide bevel; 14-Unlocking plate; 15-Guide part; 2-Spring; 3-Limiting block; 4-Hook post; 5-Limiting push post; 6-Spring connecting post; 100-First connecting piece; 200-Second connecting piece; 300-Third connecting piece; 400-First flipping piece; 500-Second flipping piece; 600-Base; 700-First support frame; 800-Second support frame. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1-3 As shown, this embodiment provides an automatic locking device applied between a first flipping member 400 and a second connecting member 200 that are rotatably connected. In the figure, the first flipping member 400 is below and the second connecting member 200 is above, with their left ends rotatably connected. The automatic locking device is used to lock the first flipping member 400 and the second connecting member 200 in a state where they are close together, that is, to restrict their unfolding. Specifically, the automatic locking device includes a locking hook 1, a spring 2, a limiting block 3, a hook post 4, and a limiting push post 5. The locking hook 1 is rotatably connected to the second connecting member 200. The spring 2 is located between the second connecting member 200 and the locking hook 1. The limiting block 3 is located on the second connecting member 200. The hook post 4 and the limiting push post 5 are located on the first flipping member 400. The limiting block 3 limits the angle at which the locking hook 1 rotates toward the hook post 4, and the limiting push post 5 limits the angle at which the locking hook 1 rotates away from the hook post 4. When the first flipping member 400 and the second connecting member 200 rotate away from each other, the limiting push post 5 pushes the locking hook 1 toward the hook post 4.

[0030] The operating principle of this embodiment is as follows: Figure 1The image shows the locked state. In this state, the locking hook 1 is hooked onto the hook post 4, and the spring 2 is located near the hook post 4 at the rotational connection point between the locking hook 1 and the second connecting piece 200. Therefore, the tension of the spring 2 will cause the locking hook 1 to press firmly against the hook post 4 to maintain the locked state. To unlock, the locking hook 1 needs to be manually moved towards the limiting push post 5, as shown below. Figure 2 The image shows the unlocked state. In this state, the hook 1 is disengaged from the hook post 4. Simultaneously, because the spring 2 is located at the rotational connection point between the hook 1 and the second connecting piece 200, or near the limit push post 5, the tension of the spring 2 will not pull the hook 1 towards the hook post 4, and the hook 1 can maintain this unlocked state. Subsequently, as... Figure 3 As shown, when the second connecting member 200 and the first flipping member 400 rotate relative to each other and gradually unfold, the limiting push post 5 slides along the locking hook 1 and pushes the locking hook 1 to rotate towards the hook post 4 until the spring 2 is at the rotation point of the locking hook 1 and the second connecting member 200, close to the hook post 4. Then, under the pull of the spring 2, the locking hook 1 will automatically rotate towards the hook post 4 until it is limited by the limiting block 3. At this time, the locking hook 1 is in the locked position. When the second connecting member 200 and the first flipping member 400 rotate relative to each other and move closer, the locking hook 1 can slide past the hook post 4 and hook onto the hook post 4 under the action of the spring 2, completing the automatic locking.

[0031] Specifically, such as Figure 4 As shown, the locking hook 1 includes a main body 11, a rotating connecting part 12 and a hook part 13 located at opposite ends of the main body 11. Spring connecting posts 6 are provided on the side of the main body 11 and on the second connecting member 200 to connect the spring 2 and prevent the spring 2 from affecting the hook part 13. To ensure the stability of the limiting block 3's limiting effect on the locking hook 1, the rotating connecting part 12 has a straight edge 121 that mates with the limiting block 3. When the straight edge 121 is in contact with the limiting block 3, the locking hook 1 is stably limited to that position, i.e., locked. To ensure the stability of the locking hook 1's engagement with the hook post 4, the width of the main body 11 near the hook part 13 is smaller than the width near the rotating connecting part 12, increasing the depth of the hook part 13 and thus improving the positional stability of the locking hook 1 when hooked onto the hook post 4.

[0032] Additionally, the end of the hook portion 13 facing away from the main body portion 11 is provided with a guide bevel 131 that engages with the hook post 4. That is, when the second connecting member 200 and the first flipping member 400 rotate relative to each other and move closer together, as the locking hook 1 slides past the hook post 4 through its guide bevel 131, the locking hook 1 rotates slightly toward the limiting push post 5 and then resets under the action of the spring 2 and hooks onto the hook post 4. To facilitate the unlocking operation, an unlocking plate 14 is provided on the back of the locking hook 1 facing away from the second connecting member 200. Setting the unlocking plate 14 on the back of the locking hook 1 also avoids interference with the spring 2. Of course, a guide portion 15 for engaging with the limiting push post 5 needs to be left on the back of the locking hook 1 on the side of the unlocking plate 14 away from the spring 2.

[0033] like Figure 5-7 As shown in the embodiment of this specification, a folding frame is also provided, including a first connecting member 100, a second connecting member 200, a third connecting member 300, a first flipping member 400, and a second flipping member 500. The two ends of the first flipping member 400 are rotatably connected to the first end of the first connecting member 100 and the first end of the second connecting member 200, respectively. The two ends of the second flipping member 500 are rotatably connected to the second end of the first connecting member 100 and the second end of the second connecting member 200, respectively. The first flipping member 400 is provided with a first support portion 401, the second flipping member 500 is provided with a second support portion 501, and the two ends of the third connecting member 300 are rotatably connected to the first support portion 401 and the second support portion 501, respectively. An automatic locking device as described above is provided between the first flipping member 400 and the second connecting member 200.

[0034] The second connector 200 and the third connector 300 are used to connect the two bed boards of the sofa bed. When the sofa bed is in use, that is, when both bed boards are at the same horizontal level, such as... Figure 5 As shown, the second connector 200 and the third connector 300 are at the same horizontal height. At this time, the second connector 200 and the first flipping member 400 are relatively close together, and the automatic locking device is locked. When manually unlocked, during the process of adjusting the sofa bed to the sofa position, the second connector 200 will gradually flip up to above the third connector 300, so that the two bed boards are in a vertically folded state. During this process, the second connector 200 and the first flipping member 400 will gradually unfold, as shown... Figure 7 As shown, the locking hook 1 will be reset to the upper locking position under the pushing action of the limit pusher 5 to complete the next automatic locking. The specific action principle is as described above.

[0035] like Figure 8As shown in the illustration, this specification also provides a sofa bed, including a base 600, a first support frame 700, and a second support frame 800, as well as a folding frame as described above. A first connector 100 is connected to the base 600, a second connector 200 is connected to the first support frame 700, and a third connector 300 is connected to the second support frame 800. The first support frame 700 and the second support frame 800 form the frame of the bed board, and their specific operating principles are as described above.

[0036] The above are merely preferred embodiments of this utility model, and are implementations based on the overall concept of this utility model. Furthermore, the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. An automatic locking device, applied between a first flipping member and a second connecting member that are rotatably connected to each other, characterized in that, The automatic locking device includes a locking hook, a spring, a limiting block, a hook post, and a limiting push post; the locking hook is rotatably connected to the second connecting member, the spring is located between the second connecting member and the locking hook, the limiting block is located on the second connecting member, and the hook post and the limiting push post are located on the first flipping member; the limiting block restricts the angle at which the locking hook rotates towards the hook post, and the limiting push post restricts the angle at which the locking hook rotates away from the hook post; the limiting push post pushes the locking hook towards the hook post when the first flipping member and the second connecting member rotate in opposite directions.

2. The automatic locking device according to claim 1, characterized in that, The locking hook includes a main body, a rotating connecting part and a hook part located at opposite ends of the main body, and spring connecting posts are provided on the side of the main body and the second connecting member.

3. The automatic locking device according to claim 2, characterized in that, The rotating connection part has a straight edge on its side that matches the limiting block.

4. An automatic locking device according to claim 2, characterized in that, The width of the main body near the hook is smaller than the width near the rotating connection.

5. An automatic locking device according to claim 2, characterized in that, The hook part is provided with a guide bevel at the end facing away from the main body part to cooperate with the hook post.

6. An automatic locking device according to claim 1, characterized in that, The back of the lock hook has an unlocking plate on the side facing away from the second connector.

7. An automatic locking device according to claim 6, characterized in that, The back of the lock hook is provided with a guide part that cooperates with the limiting push post on the side of the unlocking plate away from the spring.

8. A folding frame, comprising a first connecting member, a second connecting member, a third connecting member, a first flipping member, and a second flipping member, wherein the two ends of the first flipping member are rotatably connected to the first ends of the first connecting member and the first ends of the second connecting member, respectively; the two ends of the second flipping member are rotatably connected to the second ends of the first connecting member and the second connecting member, respectively; the first flipping member is provided with a first support portion; the second flipping member is provided with a second support portion; and the two ends of the third connecting member are rotatably connected to the first support portion and the second support portion, respectively. An automatic locking device as described in any one of claims 1-7 is provided between the first flipping member and the second connecting member.

9. A sofa bed, comprising a base, a first support frame, and a second support frame, characterized in that, It also includes the folding frame as described in claim 8, wherein the first connector is connected to the base, the second connector is connected to the first support frame, and the third connector is connected to the second support frame.

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