Electric folding assembly for folding sofa bed

Abstract

The invention discloses an electric folding assembly for a folding sofa bed, and relates to the technical field of folding sofa beds, the electric folding assembly comprises a side frame plate, a shaft column, a first folding frame, a second folding frame, a third folding frame and a supporting plate, and further comprises a folding telescopic assembly, the folding telescopic assembly is installed on one side of the side frame plate, and the folding telescopic assembly comprises a shear-type telescopic frame; a limiting ring plate is slidably connected to one side of the shear type telescopic frame, a fixing plate is fixedly connected to one side of the limiting ring plate, and a fixing block is fixedly connected to one side of the fixing plate. And a buffer assembly. The pressure sensors are arranged in key hand clamping risk areas of the side frame plates and the second folding frame, pressure signals of hand touch can be directly captured, accurate protection of'contact-to-response 'is achieved, compared with a traditional design only depending on mechanical limiting or infrared induction, the scheme can avoid protection failure caused by an induction blind area or an overlarge mechanical gap, and the safety of a human body is improved. And the clamping injury risk is reduced to the minimum.

Description

Technical Field

[0001] This invention belongs to the field of folding sofa bed technology, and specifically relates to an electric folding component for a folding sofa bed. Background Technology

[0002] To meet the convenience of using folding sofa beds, electric folding sofa beds are already available on the market. The electric folding component is an important part of the folding sofa bed, which can control the folding and transformation of the sofa bed, making it easy to transform it into a sofa or bed according to usage needs. However, the existing electric folding components still have some shortcomings in use.

[0003] Existing technologies mostly rely on a single protective measure. Mechanical limiters can only restrict the minimum clamping gap, but cannot cope with sudden touches within the gap (such as a child's finger entering the space allowed by the limiter). Infrared or ultrasonic sensors are easily affected by environmental interference (such as light or fabric obstruction), and their sensitivity to hands that are in close contact with the mechanical surface (without forming a clear obstruction outline) is insufficient, resulting in a delayed protective response. Traditional designs often only perform a "stop" action after detecting a hazard. However, the inertia or residual driving force of the folding component may still put pressure on the hand that has entered the clamping area. For example, after the motor is powered off, the telescopic structure continues to move slightly due to its own weight or the residual movement of the gears, causing the clamping pressure to continue to increase. There is a lack of "active retraction" or "buffer release" mitigation steps, and the protective effect is limited to "terminating the hazard" rather than "eliminating the hazard," which means that the safety of using electric folding components cannot be guaranteed. Summary of the Invention

[0004] The purpose of this invention is to address the low safety of existing electric folding components for folding sofa beds, and to propose an electric folding component for folding sofa beds. This electric folding component for folding sofa beds, by incorporating a buffer assembly, not only stops the movement of the folding sofa bed in the event of a pinch, but also releases the buffer space, thereby eliminating the risk of pinching and increasing its safety during use.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: Design an electric folding assembly for a folding sofa bed, comprising: a side frame plate, a shaft column, a first folding frame, a second folding frame, a third folding frame, and a support plate; further comprising: a folding telescopic assembly, which is installed on one side of the side frame plate and includes a scissor-type telescopic frame, one side of which is slidably connected to a limit ring plate, and one side of the limit ring plate is fixedly connected to a fixing plate, and one side of the fixing plate is fixedly connected to a fixing block; a buffer assembly, which is installed on one side of the folding telescopic assembly and includes a buffer box, the inside of which is equipped with a telescopic spring; and pressure sensors, which are symmetrically installed on both sides of the second folding frame.

[0006] Furthermore, the limiting ring plate and the fixing block are symmetrically installed on both sides of the scissor telescopic frame, and the two limiting ring plates and the fixing block are respectively fixedly installed on one side of the fixing plate and the support plate. One side of the scissor telescopic frame is rotatably connected to the fixing block, and the fixing plate is fixedly connected to one side of the side frame plate.

[0007] Furthermore, a connecting column is connected to one side of the scissor-type telescopic frame, and a connecting frame is fixedly connected to one end of the connecting column. A movable plate is fixedly connected to one side of the connecting frame, and the movable plate is movably disposed inside the buffer box.

[0008] Furthermore, an electric push rod is fixedly installed on one side of the fixed plate, and one end of the telescopic rod of the electric push rod is fixedly connected to one side of the buffer box. A locking block is inserted inside the buffer box, and the locking block is engaged on both sides of the moving plate. The telescopic spring is fixedly installed between the moving plate and the buffer box.

[0009] Furthermore, a compression box is fixedly connected to one side of the card block, and a compression block is fixedly connected inside the compression box. The bottom of the compression block has a sloping structure, and a compression plate is pressed and disposed at the bottom of the compression block. The top of the compression plate has a sloping structure.

[0010] Furthermore, an extrusion column is fixedly connected to the top of one side of the extrusion plate, the extrusion column is vertically arranged at the bottom of the moving plate, a limit spring is fixedly connected to one side of the extrusion box, and the limit spring is fixedly installed on one side of the buffer box, an electric push rod is fixedly installed on one side of the buffer box, and one end of the telescopic rod of the electric push rod is fixedly connected to one side of the extrusion plate.

[0011] Furthermore, the shaft column is fixedly installed on one side of the side frame plate, and the first folding frame is rotatably installed on one side of the shaft column. The first folding frame and the second folding frame, as well as the second folding frame and the third folding frame, are rotatably connected by hinges. A support plate is fixedly connected to one side of the side frame plate, and rollers are rotatably installed at equal intervals inside the support plate. The rollers are located at the bottom of the first folding frame.

[0012] The electric folding assembly for a folding sofa bed proposed in this invention has the following advantages: the invention sets pressure sensors in the key hand-pinch risk areas of the side frame and the second folding frame, which can directly capture the pressure signal of hand touch and achieve precise protection of "contact response". Compared with the traditional design that only relies on mechanical limit or infrared sensing, this solution can avoid protection failure caused by sensing blind spots or excessive mechanical gaps, and minimize the risk of pinching injury. After the electric push rod stops working, the activation of the telescopic rod can form a dynamic release mechanism, first stopping dangerous movements, then expanding the safety gap through the reserved space of the buffer component, and finally actively retracting to reduce pressure. It upgrades from "passive blocking" to "active relief", which better meets the immediate needs of human protection, thereby improving the safety of using electric folding components. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram showing the usage location of the pressure sensor of the present invention; Figure 3 This is a folding diagram of the folding frame one and folding frame two of the present invention; Figure 4 This is a schematic diagram showing the positional structure of the pallet and roller of the present invention; Figure 5 This is a schematic diagram of the connection structure between the buffer component and the folding and telescopic component of the present invention; Figure 6 This is a schematic diagram of the split structure of the buffer component of the present invention; Figure 7 This is a schematic diagram of the unfolded folding frame two and folding frame three of the present invention; The following are marked in the diagram: 1. Side frame plate; 2. Folding telescopic assembly; 21. Scissor telescopic frame; 22. Limiting ring plate; 23. Fixing block; 24. Fixing plate; 25. Connecting column; 26. Connecting frame; 27. Moving plate; 28. Electric push rod; 3. Buffer assembly; 31. Locking block; 32. Buffer box; 33. Telescopic spring; 34. Compression box; 35. Compression block; 36. Limiting spring; 37. Compression plate; 38. Compression column; 39. Electric push rod; 4. Shaft column; 5. Folding frame one; 6. Folding frame two; 7. Folding frame three; 8. Support plate; 9. Pressure sensor; 10. Support plate; 11. Roller. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0015] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0016] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0017] The structural features of the present invention will now be described in detail with reference to the accompanying drawings.

[0018] See Figures 1-7 An electric folding assembly for a folding sofa bed includes a side frame plate 1, a shaft column 4, a first folding frame 5, a second folding frame 6, a third folding frame 7, and a support plate 8. It also includes: a folding telescopic assembly 2 installed on one side of the side frame plate 1, comprising a scissor-type telescopic frame 21. A limiting ring plate 22 is slidably connected to one side of the scissor-type telescopic frame 21, and a fixing plate 24 is fixedly connected to one side of the limiting ring plate 22. The limiting ring plate 22 and the fixing block 23 are symmetrically installed on both sides of the scissor-type telescopic frame 21, and the two limiting ring plates 22 and the fixing block 23 are respectively fixedly installed on one side of the fixing plate 24 and the support plate 8. One side of the scissor-type telescopic frame 21 is rotatably connected to the fixing block 23. The fixing plate 24 is fixedly connected to one side of the side frame plate 1, and a fixing block 23 is fixedly connected to one side of the fixing plate 24. A buffer assembly 3 is installed on one side of the folding telescopic assembly 2, and the buffer assembly 3... The punching assembly 3 includes a buffer box 32, a connecting column 25 connected to one side of the shaft of the scissor-type telescopic frame 21, and a connecting frame 26 fixedly connected to one end of the connecting column 25. A movable plate 27 is fixedly connected to one side of the connecting frame 26, and the movable plate 27 is movably disposed inside the buffer box 32. A telescopic spring 33 is installed inside the buffer box 32. An electric push rod 28 is fixedly installed on one side of the fixed plate 24, and one end of the telescopic rod of the electric push rod 28 is fixedly connected to one side of the buffer box 32. A shaft column 4 is fixedly installed on one side of the side frame plate 1, and a folding frame 1 5 is rotatably installed on one side of the shaft column 4. The folding frame 1 5 and the folding frame 2 6 and the folding frame 2 6 and the folding frame 3 7 are rotatably connected by hinges. A support plate 10 is fixedly connected to one side of the side frame plate 1, and rollers 11 are rotatably installed at equal intervals inside the support plate 10. The rollers 11 are disposed at the bottom of the folding frame 1 5.

[0019] Specifically, during use, the electric push rod 28 drives the buffer box 32 to move downward, thereby causing the connecting frame 26 to drive the connecting column 25 to move the shaft on one side of the scissor telescopic frame 21 downward inside the limiting ring plate 22. This causes the bottom side of the scissor telescopic frame 21 to rotate on one side of the fixed block 23, thereby rotating and extending the scissor telescopic frame 21 as a whole. This, in turn, pushes the support plate 8 to move outward to the side frame plate 1, pulling out and flattening the folding frame 1 5, folding frame 2 6, and folding frame 3 7, transforming the folding sofa bed into a bed form. After extension, folding frame 1 5 rests on the top of the support plate 10, ensuring the stability of the bed form. The roller 11 facilitates the sliding of folding frame 1 5 and folding frame 2 6. At the same time, the bottom of the support plate 8 is equipped with rollers, thereby reducing the resistance of the folding sofa bed extension and transformation, and facilitating the extension and use of the scissor telescopic frame 21.

[0020] A locking block 31 is inserted inside the buffer box 32, and the locking block 31 is engaged on both sides of the moving plate 27. A telescopic spring 33 is fixedly installed between the moving plate 27 and the buffer box 32. Pressure sensors 9 are symmetrically installed on both sides of the folding frame 6. A compression box 34 is fixedly connected to one side of the locking block 31, and a compression block 35 is fixedly connected inside the compression box 34. The bottom of the compression block 35 has a sloping structure, and a compression plate 37 is pressed against the bottom of the compression block 35. The top of the compression plate 37 has a sloping structure, and a compression column 38 is fixedly connected to the top of one side of the compression plate 37. (See also...) Figure 6 The extrusion plate 37 has a right-angle folded plate structure, and the length of the inclined side of the extrusion plate 37 is greater than the height of the extrusion column 38. The extrusion column 38 is vertically set at the bottom of the moving plate 27. A limit spring 36 is fixedly connected to one side of the extrusion box 34, and the limit spring 36 is fixedly installed on one side of the buffer box 32. An electric push rod 39 is fixedly installed on one side of the buffer box 32, and one end of the telescopic rod of the electric push rod 39 is fixedly connected to one side of the extrusion plate 37.

[0021] Specifically, during use, when the electric folding assembly unfolds the sofa bed into bed form, if a hand touches the area between the folding frame 26 and the side frame 1 where it is easy to pinch, the pressure sensor 9 will be activated by the pressure of the hand, triggering the electric push rod 28 to stop working. This stops the extension of the scissor-type telescopic frame 21. Simultaneously, the electric push rod 39 is activated, pulling the compression plate 37 and compression column 38 to move. The compression plate 37 is inserted into the compression box 34 and compresses the compression block 35, causing the compression box 34 to move the locking block 31 outward from the buffer box 32, thereby removing the restriction on the moving plate 27. The compression plate 37 then moves, causing the compression column 38 to compress the moving plate 27, thereby compressing the telescopic spring 33. The moving plate 27 then drives the connecting frame 26 to move, and the connecting frame 26 drives the connecting column 25 to keep the shaft on one side of the scissor-type telescopic frame 21 within the limit. The inner ring plate 22 moves upward, thereby retracting the scissor-type telescopic frame 21 a certain distance, releasing the buffer space of the electric folding assembly, thus eliminating the risk of pinching hands. After removing the hand, the electric push rod 39 pushes the compression plate 37, causing the compression column 38 to move out of the buffer box 32. The elasticity of the telescopic spring 33 resets the moving plate 27 downward, and then the compression plate 37 moves out of the compression box 34. The elasticity of the limit spring 36 then moves the locking block 31 into the buffer box 32 on one side, locking it to the outside of the moving plate 27. This allows the electric push rod 28 to move the buffer box 32 to continue extending the scissor-type telescopic frame 21. A control box is provided on one side of the side frame plate 1, containing an electric control circuit board. This allows the use of the electric push rod 28 and the electric push rod 39 to be controlled by changing the pressure threshold of the pressure sensor 9, thereby achieving the above operations.

[0022] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electric folding assembly for a folding sofa bed, comprising a side frame (1), a pivot column (4), a first folding frame (5), a second folding frame (6), a third folding frame (7), and a support plate (8), characterized in that, Also includes: Folding telescopic assembly (2), the folding telescopic assembly (2) is installed on one side of the side frame plate (1), and the folding telescopic assembly (2) includes a scissor telescopic frame (21), one side of the scissor telescopic frame (21) is slidably connected to a limiting ring plate (22), and one side of the limiting ring plate (22) is fixedly connected to a fixing plate (24), and one side of the fixing plate (24) is fixedly connected to a fixing block (23). A buffer assembly (3) is installed on one side of the folding telescopic assembly (2), and the buffer assembly (3) includes a buffer box (32) with a telescopic spring (33) installed inside the buffer box (32). Pressure sensor (9) is symmetrically installed on both sides of folding frame two (6).

2. The electric folding assembly for a folding sofa bed according to claim 1, characterized in that, The limiting ring plate (22) and the fixing block (23) are symmetrically installed on both sides of the scissor telescopic frame (21), and the two limiting ring plates (22) and the fixing block (23) are respectively fixedly installed on one side of the fixing plate (24) and the support plate (8). One side of the scissor telescopic frame (21) is rotatably connected to the fixing block (23), and the fixing plate (24) is fixedly connected to one side of the side frame plate (1).

3. The electric folding assembly for a folding sofa bed according to claim 2, characterized in that, One side of the scissor telescopic frame (21) is connected to a connecting column (25), and one end of the connecting column (25) is fixedly connected to a connecting frame (26). One side of the connecting frame (26) is fixedly connected to a movable plate (27), and the movable plate (27) is movably disposed inside the buffer box (32).

4. The electric folding assembly for a folding sofa bed according to claim 1, characterized in that, An electric push rod (28) is fixedly installed on one side of the fixed plate (24), and one end of the telescopic rod of the electric push rod (28) is fixedly connected to one side of the buffer box (32). A locking block (31) is inserted inside the buffer box (32), and the locking block (31) is engaged on both sides of the moving plate (27). The telescopic spring (33) is fixedly installed between the moving plate (27) and the buffer box (32).

5. The electric folding assembly for a folding sofa bed according to claim 4, characterized in that, A compression box (34) is fixedly connected to one side of the card block (31), and a compression block (35) is fixedly connected inside the compression box (34). The bottom of the compression block (35) is inclined, and a compression plate (37) is extruded at the bottom of the compression block (35). The top of the compression plate (37) is inclined.

6. The electric folding assembly for a folding sofa bed according to claim 5, characterized in that, An extrusion column (38) is fixedly connected to the top of one side of the extrusion plate (37). The extrusion column (38) is vertically set at the bottom of the moving plate (27). A limit spring (36) is fixedly connected to one side of the extrusion box (34), and the limit spring (36) is fixedly installed on one side of the buffer box (32). An electric push rod (39) is fixedly installed on one side of the buffer box (32), and one end of the telescopic rod of the electric push rod (39) is fixedly connected to one side of the extrusion plate (37).

7. The electric folding assembly for a folding sofa bed according to claim 1, characterized in that, The shaft column (4) is fixedly installed on one side of the side frame plate (1), and the first folding frame (5) is rotatably installed on one side of the shaft column (4). The first folding frame (5) and the second folding frame (6) and the second folding frame (6) and the third folding frame (7) are rotatably connected by hinges. A support plate (10) is fixedly connected to one side of the side frame plate (1), and rollers (11) are rotatably installed at equal intervals inside the support plate (10). The rollers (11) are located at the bottom of the first folding frame (5).

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