Anti-pinch sofa telescopic bracket

Abstract

The invention relates to an anti-pinch sofa telescopic support, and relates to the technical field of functional iron stands, the anti-pinch sofa telescopic support comprises a main footrest and an auxiliary footrest, the main footrest is used for being connected with an iron stand for installing a sofa through a connecting frame, and the connecting frame is further used for being connected with a driving structure arranged on the sofa; the connecting frame comprises a first connecting plate, a second connecting plate, a third connecting plate and a fourth connecting plate, and a widening part is arranged between the two ends of the fourth connecting plate and extends towards the third connecting plate in the width direction. A widened part is arranged between the two end parts of the fourth connecting plate and extends towards the third connecting plate in the width direction, and no dislocation gap exists between the position of the widened part and the side projection direction of the third connecting plate; when the main footrest and the auxiliary footrest are in a hidden state, the position of the widening part and the third connecting plate have no dislocation gap in the lateral projection direction. By arranging the widening part, the gap between the connecting plates is reduced, and the safety is improved.

Description

[Technical field]

[0001] The present application relates to the technical field of functional iron frames, and in particular to an anti-pinching sofa telescopic bracket. [Background technology]

[0002] A sofa is a multi-seat chair with soft cushions and a backrest with springs or thick foam plastics. The comfort requirements for sofa seats are getting higher and higher. Functional seats are generally equipped with functional iron frames, so that the seats can switch between sitting, leisure and lying positions.

[0003] The footrest in a traditional sofa is used to support the legs, and the design of the footrest is relatively simple, generally consisting of only a piece of board with a fixed area, and after use, the footrest needs to be hidden inside the sofa. However, due to the limited height of the space inside the sofa, the area of ​​the footrest is small, resulting in poor support for the legs by the footrest, especially for people with long legs, the support effect is even worse, thereby reducing the comfort of the telescopic bracket mechanism when used.

[0004] Some existing electric sofas with footrest function have multiple transmission connecting rods inside, so users may get their hands caught when using them, which poses certain safety hazards. [Summary of the invention]

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a mechanism with the function of hiding and extending a footrest, thereby reducing the safety hazard of pinching the hand.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A telescopic support for a sofa to prevent pinching of fingers, comprising a main footrest and an auxiliary footrest, wherein the main footrest is connected to an iron frame for installing the sofa through a connecting frame, and the connecting frame is also connected to a driving structure arranged on the sofa, and the connecting frame comprises:

[0008] A first connecting plate and a second connecting plate, wherein one end of the first connecting plate and the second connecting plate are respectively rotatably mounted on the iron frame;

[0009] A third connecting plate and a fourth connecting plate, wherein two ends of the third connecting plate are rotatably connected to the main footrest and the second connecting plate respectively, two ends of the fourth connecting plate are rotatably connected to the first connecting plate and the main footrest respectively, and the middle position of the fourth connecting plate is rotatably connected to the second connecting plate;

[0010] When the main footrest and the auxiliary footrest are opened at the same time, the fourth connecting plate has a widened portion extending between the two ends in the width direction toward the third connecting plate, and there is no misalignment gap between the widened portion and the third connecting plate in the lateral projection direction;

[0011] The main footrest and the auxiliary footrest are in a hidden state, and there is no misalignment gap between the widened portion and the third connecting plate in the lateral projection direction.

[0012] The beneficial effects of the present invention are as follows:

[0013] By adopting the above technical scheme, the connecting frame in the present invention adopts a four-bar transmission mechanism, and the transmission of this four-bar transmission mechanism is relatively stable. The third connecting plate and the fourth connecting plate are respectively rotatably connected to the main footrest, so that the main footrest rotates toward the outside of the sofa and the main footrest also rotates, which supports the user's steps and improves the user's comfort when using it.

[0014] In addition, in the present invention, the fourth connecting plate has a widened portion extending in the width direction between the two ends toward the third connecting plate. In actual work, when the main footrest is unfolded, the third connecting plate and the fourth connecting plate are more exposed connecting plates compared to the first connecting plate and the second connecting plate. The widened portion is provided mainly to reduce the gap between the fourth connecting plate and the third connecting plate in the lateral projection direction. On the one hand, it can reduce the possibility of users accidentally inserting their fingers into the gap during use, reducing safety hazards. On the other hand, it can also reduce the possibility of some small external parts being clamped between the third connecting plate and the fourth connecting plate, reducing possible operating obstacles. At the same time, after providing the widened portion, the strength of the fourth connecting plate can also be strengthened to a certain extent, so that the connection frame has better stability during the transmission process.

[0015] Finally, in the present invention, the main footrest and the auxiliary footrest are further optimized in the hidden state, and the widened portion has no misalignment gap with the third connecting plate in the lateral projection direction and at least partially overlaps. Generally speaking, the gap between the main footrest and the auxiliary footrest is at its maximum in the unfolded state, while in the present invention, it is at least partially overlapped in the hidden state, which is equivalent to the gap between the third connecting plate and the fourth connecting plate being always small during the process from the hidden state to the unfolded state, thereby reducing the potential safety hazards during the entire operation process from the hidden state to the unfolded state.

[0016] Preferably, when the main footrest and the auxiliary footrest are in a hidden state, the fourth connecting plate is nearly parallel to the third connecting plate in the length direction, and the third connecting plate is covered by the fourth connecting plate.

[0017] Preferably, the connecting frame is used for transmission connection with the driving structure of the sofa, the second connecting plate is connected to the driving structure, and the third connecting plate and the fourth connecting plate are respectively located on different sides of the second connecting plate.

[0018] Preferably, the fourth connecting plate is located at the outermost side of the connecting frame.

[0019] Preferably, the fourth connecting plate and the third connecting plate are provided with a gap X in the thickness direction, and the gap X satisfies 1 mm. <X<10mm。

[0020] Preferably, the auxiliary footrest is rotatably connected to the connecting frame through a linkage assembly and enables the auxiliary footrest and the main footrest to move simultaneously, so that the main footrest and the auxiliary footrest are turned to the outside of the iron frame for use or turned to the inside of the sofa for hiding; when the main footrest is hidden, the auxiliary footrest is located on the side of the main footrest close to the inside of the sofa, or, when the main footrest and the auxiliary footrest cooperate to support the legs, the auxiliary footrest is located on the side of the main footrest away from the iron frame.

[0021] Preferably, the linkage component comprises:

[0022] a first linkage plate and a second linkage plate, wherein the first linkage plate and the second linkage plate are rotatably mounted on the main footrest through a first rotating shaft and a second rotating shaft respectively;

[0023] The third linkage plate is rotatably mounted on the first linkage plate via a third rotating shaft, and the middle portion of the third linkage plate is rotationally connected to the second linkage plate, the other end of the third linkage plate is used to be connected to the auxiliary footrest, and the third connecting plate is provided with a synchronization component which is connected to the first linkage plate and causes the first linkage plate to rotate.

[0024] Preferably, the first linkage plate and the second linkage plate are respectively located on different sides of the main footrest.

[0025] Preferably, the synchronization component comprises:

[0026] A first synchronizing plate, wherein the first synchronizing plate is arranged on the first linkage plate and is respectively located at two end sides of the first rotating shaft with the third linkage plate;

[0027] The second synchronous plate is rotatably mounted on an end of the first synchronous plate away from the first rotating shaft and is rotatably connected to an end of the third connecting plate away from the first connecting plate.

[0028] Preferably, a bearing plate for rotationally connecting with the third connecting plate, the fourth connecting plate, the first linkage plate and the second linkage plate is detachably provided on the main footrest.

[0029] Preferably, the third connecting plate and the first linkage plate are both provided with a bending portion away from the bearing plate for avoiding position, and the second synchronization plate is located on the side of the bending portion away from the bearing plate.

[0030] Preferably, when the main footrest and the auxiliary footrest are in a hidden state, the auxiliary footrest has no overlap with the linkage assembly in the lateral projection direction.

[0031] Preferably, the fourth connecting plate is provided with a first limiting component for limiting the position of the main footrest when in use, the first limiting component includes a first limiting column, and the second connecting plate is pressed against the first limiting column to position the telescopic bracket when in use; and / or, the second linkage plate is provided with a second limiting component for limiting the position of the auxiliary footrest when in use, the second limiting component includes a second limiting column, and the third linkage plate is pressed against the second limiting column to position the telescopic bracket when in use.

[0032] Preferably, the first connecting plate and the second connecting plate are respectively connected to the two side walls of the iron frame opposite to each other, and the second connecting plate is provided with a bending section for avoiding position.

[0033] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0034] Figure 1 It is a schematic diagram of the structure when the telescopic bracket in the present application is hidden;

[0035] Figure 2 It is a schematic diagram of the structure of the telescopic bracket in the present application when it is opened for use, omitting the main footrest 11 and the auxiliary footrest 12;

[0036] Figure 3 It is a schematic diagram of the local structure in this application.

[0037] : 11. main footrest; 12. auxiliary footrest; 13. load-bearing plate; 14. iron frame; 2. connecting frame; 21. first connecting plate; 22. second connecting plate; 23. third connecting plate; 24. fourth connecting plate; 241. widening portion; 25. bending section; 3. linkage assembly; 31. first linkage plate; 32. second linkage plate; 33. third linkage plate; 34. first rotating shaft; 35. second rotating shaft; 36. third rotating shaft; 4. synchronization assembly; 41. first synchronization plate; 42. second synchronization plate; 43. bending portion; 5. limiting assembly; 51. first limiting column; 52. second limiting column; 53. first arc groove; 54. second arc groove. [Specific implementation method]

[0038] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0039] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through an intermediate structure, but are only connected to form a whole through a connecting structure. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0042] Embodiment 1:

[0043] Reference Figure 1The present embodiment discloses a telescopic support for a sofa for preventing hand pinching, comprising a main footrest 11 and an auxiliary footrest 12. The main footrest 11 is used to be connected to an iron frame 14 for installing the sofa through a connecting frame 2, and the connecting frame 2 is also used to be connected to a driving structure arranged on the sofa, so as to realize the movement of the connecting frame 2; the auxiliary footrest 12 is connected to the connecting frame 2 through a linkage component 3, so that the auxiliary footrest 12 moves simultaneously with the main footrest 11, so that the main footrest 11 and the auxiliary footrest 12 are turned to the outside of the sofa 14 for use or turned to the inside of the sofa for hiding.

[0044] Reference Figure 1 and Figure 2 The area of ​​the main footrest 11 is larger than that of the auxiliary footrest 12, and both the main footrest 11 and the auxiliary footrest 12 are rectangular structures; when the main footrest 11 and the auxiliary footrest 12 are moved to the inside of the sofa for storage, the main footrest 11 is in a vertical state, and the auxiliary footrest 12 is located on the side of the main footrest 11 close to the inside of the sofa, and the bottom end of the auxiliary footrest 12 is in an inclined state close to the side of the main footrest 11; or, when the main footrest 11 and the auxiliary footrest 12 are moved to the outside of the sofa for use, the main footrest 11 and the auxiliary footrest 12 are both in a horizontal state and cooperate to support the legs of the person, and at the same time, the auxiliary footrest 12 is located on the side of the main footrest 11 away from the iron frame 14.

[0045] Both ends of the main footrest 11 are fixedly mounted on a bearing plate 13 by screws. Two connecting frames 2 are arranged at intervals along the length direction of the main footrest 11 and are respectively connected to the two bearing plates 13. The rotation directions of each structure in the connecting frame 2 are parallel and the rotation axis is parallel to the length direction of the main footrest 11.

[0046] Reference Figure 2 and Figure 3 The connecting frame 2 includes a first connecting plate 21, a second connecting plate 22, a third connecting plate 23 and a fourth connecting plate 24. The top ends of the first connecting plate 21 and the second connecting plate 22 are transmission-mounted on the opposite side walls of the iron frame 14, and the first connecting plate 21 is located on the side of the second connecting plate 22 close to the inside of the sofa; one end of the third connecting plate 23 is rotatably mounted on the bottom end of the second connecting plate 22 and the other end is rotatably connected to the supporting plate 13; the fourth connecting plate 24 is rotatably mounted on the bottom end of the second connecting plate 22 and its two ends are rotatably connected to the bottom end of the first connecting plate 21 and the supporting plate 13 respectively.

[0047] like Figure 2As shown, the fourth connecting plate 24 has a widened portion 241 extending in the width direction between the two ends toward the third connecting plate 23. When the main footrest 11 and the auxiliary footrest 12 are opened at the same time, the preferred location of the widened portion 241 has no misalignment gap with the third connecting plate 23 in the lateral projection direction. This design is to minimize the gap between the fourth connecting plate 24 and the third connecting plate 23 in the lateral projection direction, minimize the possibility of users accidentally inserting their fingers into the gap during use, and reduce safety hazards. It should be noted that the lateral projection direction referred to in this article, i.e. Figure 2 The normal viewing angle direction shown in Figure 2 It can be seen that the third connecting plate 23 and the fourth connecting plate 24 are almost in a gap-free state when in the open state, which not only reduces potential safety hazards, but also reduces the possibility of some small external parts being sandwiched between the third connecting plate 23 and the fourth connecting plate 24, thereby reducing possible operational obstacles. At the same time, the provision of the widened portion 241 can also strengthen the strength of the fourth connecting plate 24 to a certain extent, thereby making the connecting frame 2 more stable during the transmission process.

[0048] like Figure 1 and Figure 2 As shown, in this embodiment, the fourth connecting plate 24 is located at the outermost side of the connecting frame 2. Placing the fourth connecting plate 24 with the widened portion 241 at the outermost side can maximize safety, which is equivalent to achieving direct shielding. If the fourth connecting plate 24 with the widened portion 241 is located on the inner side, because the gap between the third connecting plate 23 and the fourth connecting plate 24 in the thickness direction still exists, there is still a high probability that a child's fingers or small external objects enter from the vertical gap. Therefore, although the widened portion has increased safety to a certain extent, arranging the fourth connecting plate 24 on the outer side has a better effect.

[0049] like Figure 1 As shown, the main footrest 11 and the auxiliary footrest 12 are in a hidden state, the fourth connecting plate 24 is nearly parallel to the third connecting plate 23 in the length direction, and the third connecting plate 23 is covered by the fourth connecting plate 24. Figure 1 It can be seen that because the fourth connecting plate 24 is nearly parallel to the third connecting plate 23 in the length direction, the third connecting plate 23 is almost mostly covered by the fourth connecting plate 24. In this way, from the hidden state to the unfolded state, the gap between the third connecting plate 23 and the fourth connecting plate 24 is almost not exposed, and the possibility of the user's hand being pinched between the third connecting plate 23 and the fourth connecting plate 24 is further reduced.

[0050] In addition, if Figure 3As shown, in this embodiment, the gap between the third connecting plate 23 and the fourth connecting plate 24 in the thickness direction is further optimized. The thickness direction referred to in this article can be referred to Figure 3 the vertical direction marked. There is a gap X between the fourth connecting plate 24 and the third connecting plate 23 in the thickness direction. The gap X satisfies 1mm < X < 10mm. If the gap is too small, it will cause interference problems during the movement of the third connecting plate 23 and the fourth connecting plate 24. If the gap is too large, it will increase potential safety hazards. Generally, it is preferably set to 4mm, 5mm, or 6mm.

[0051] As Figure 3 shown, the second connecting plate 22 is connected to the driving structure. The third connecting plate 23 and the fourth connecting plate 24 are respectively located on different sides of the second connecting plate 22. Such a design can balance the forces on both sides of the second connecting plate 22, make the product structure more stable, and further improve safety.

[0052] The fourth connecting plate 24 is located on the side of the second connecting plate 22背离 the third connecting plate 23. The first connecting plate 21 and the second connecting plate 22 are connected to the same side wall of the fourth connecting plate 24. At the same time, a bent section 25背离 the first connecting plate 21 is formed on the second connecting plate 22 by bending, so as to realize the rotational connection of the first connecting plate 21 and the second connecting plate 22 to the opposite side walls of the iron frame 14 respectively; the driving structure adopts an electric push rod, and a push plate rotatably connected to the bent section 25 is fixedly installed on the electric push rod.

[0053] Referring to Figure 1 and Figure 2 , the linkage assembly 3 includes a first linkage plate 31, a second linkage plate 32, and a third linkage plate 33. The first linkage plate 31 and the second linkage plate 32 are respectively rotatably installed on the bearing plate 13 through a first rotating shaft 34 and a second rotating shaft 35. When the bearing plate 13 makes the main footrest 11 in a horizontal state, the first linkage plate 31 and the second linkage plate 32 are located on the side of the third connecting plate 23 away from the iron frame 14, and the first linkage plate 31 is located below the second linkage plate 32; the bottom end of the third linkage plate 33 is rotatably installed on the end of the first linkage plate 31 away from the bearing plate 13. At the same time, the third linkage plate 33 is rotatably connected to the end of the second linkage plate 32 away from the bearing plate 13 and the top end is inclined upward. At the same time, the auxiliary footrest 12 is fixedly installed on the top end of the third linkage plate 33 through a screw.

[0054] Referring to Figure 1 and Figure 2A synchronization assembly 4 is provided on the third connecting plate 23, which is connected to the first linkage plate 31 and enables the first linkage plate 31 to rotate. The synchronization assembly 4 includes a first synchronization plate 41 and a second synchronization plate 42. The first synchronization plate 41 is integrally arranged on one end of the first linkage plate 31 away from the first rotating shaft 34 and close to the third connecting plate 23, so that the first synchronization plate 41 and the third linkage plate 33 are respectively located on both sides of the first rotating shaft 34, and one end of the third connecting plate 23 away from the second connecting plate 22 and one end of the first synchronization plate 41 away from the first rotating shaft 34 are both bent to form a bending portion 43 by bending, and the bending portion 43 is arranged away from the side of the bearing plate 13, and the two ends of the second synchronization plate 42 are respectively rotatably connected with the two bending portions 43, and the second synchronization plate 42 is located on the side of the bending portion 43 away from the bearing plate 13, and at the same time, the two rotation points of the second synchronization plate 42 are respectively located on both sides of the rotation points of the third connecting plate 23 and the bearing plate 13.

[0055] Reference Figure 2 and Figure 3 The fourth connecting plate 24 and the third linkage plate 33 are provided with a limiting component 5 for limiting the position of the main footrest 11 and the auxiliary footrest 12 when in use. The limiting component specifically includes a first limiting component and a second limiting component, wherein the first limiting component is used to limit the position of the main footrest 11 when in use, and the second limiting component is used to limit the position of the auxiliary footrest 12 when in use. The first limiting assembly includes a first limiting column 51, which is fixedly mounted on the side wall of the fourth connecting plate 24 close to the second connecting plate 22, and two first limiting columns 51 are provided and are located on both sides of the second connecting plate 22, and at the same time, the second connecting plate 22 has two opposite side walls provided with first arc grooves 53 which fit with the first limiting column 51 for positioning; the second limiting assembly includes a second limiting column 52, which is fixedly mounted on the side wall of the second linkage plate 32 close to the first linkage plate 31, and the first linkage plate 31 has a second arc groove 54 which fits with the second limiting column 52 for positioning.

[0056] When the telescopic bracket is opened, the second connecting plate 22 rotates close to the two first limiting columns 51 until the two first limiting columns 51 are tightly pressed against the two first arc-shaped grooves 53 for positioning, and at the same time, the second linkage plate 32 approaches the second limiting column 52 until the second limiting column 52 is tightly pressed against the second arc-shaped groove 54 for positioning. At this time, the main footrest 11 and the auxiliary footrest 12 are in a horizontal state and are used to support the legs of the person for positioning.

[0057] In addition, combined Figure 1As shown, it is a schematic diagram of the main footrest 11 and the auxiliary footrest 12 in a hidden state. It can be seen from the schematic diagram that the auxiliary footrest 12 has no overlap with the linkage assembly in the lateral projection direction, for example, it does not overlap with the second linkage plate 32. This design allows the length of the auxiliary footrest 12 to extend outside the linkage assembly and is not restricted by the length of the linkage assembly. If the auxiliary footrest 12 overlaps with the linkage assembly in the lateral projection direction, the length of the auxiliary footrest 12 cannot exceed the lateral distance between the two linkage assemblies, which easily causes the main footrest 11 to be long and the auxiliary footrest 12 to be short. If the auxiliary footrest 12 is short, the range of the user's footrest is affected. Therefore, this structure is designed in this embodiment, and the length of the auxiliary footrest 12 can be set arbitrarily without being affected by the linkage assembly.

[0058] The working principle of the embodiment of the present application is as follows:

[0059] When it is needed, the electric push rod is started to drive the second connecting plate 22 to rotate, and at the same time, the first connecting plate 21, the third connecting plate 23 and the fourth connecting plate 24 are rotated to drive the load-bearing plate 13 and the main footrest 11 to rotate from the inside of the sofa to the outside of the sofa, and at the same time, the auxiliary footrest 12 is driven to rotate through the first linkage plate 31, the second linkage plate 32 and the third linkage plate 33, so that the main footrest 11 and the auxiliary footrest 12 are both rotated to the outside of the sofa and are in a horizontal state, thereby supporting the legs of the person; and when it is necessary to retract, the electric push rod retracts to drive the main footrest 11 and the auxiliary footrest 12 to rotate to the inside of the sofa for hiding, thereby improving the comfort of the telescopic bracket when used.

[0060] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A telescopic support for a sofa to prevent pinching of fingers, comprising a main footrest and an auxiliary footrest, wherein the main footrest is connected to an iron frame for installing the sofa through a connecting frame, and characterized in that: The connecting frame comprises: A first connecting plate and a second connecting plate, wherein one end of the first connecting plate and the second connecting plate are respectively rotatably mounted on the iron frame; A third connecting plate and a fourth connecting plate, wherein two ends of the third connecting plate are rotatably connected to the main footrest and the second connecting plate respectively, two ends of the fourth connecting plate are rotatably connected to the first connecting plate and the main footrest respectively, and the middle position of the fourth connecting plate is rotatably connected to the second connecting plate; When the main footrest and the auxiliary footrest are opened at the same time, the fourth connecting plate has a widened portion extending between the two ends in the width direction toward the third connecting plate, and there is no misalignment gap between the widened portion and the third connecting plate in the lateral projection direction; When the main footrest and the auxiliary footrest are in a hidden state, the widened portion has no misalignment gap with the third connecting plate in the lateral projection direction and at least partially overlaps with the third connecting plate.

2. The sofa telescopic bracket for preventing hand pinching according to claim 1, characterized in that: When the main footrest and the auxiliary footrest are in a hidden state, the fourth connecting plate is nearly parallel to the third connecting plate in the length direction, and the third connecting plate is covered by the fourth connecting plate.

3. The sofa telescopic bracket for preventing hand pinching according to claim 1, characterized in that: The connecting frame is used for transmission connection with the driving structure of the sofa, the second connecting plate is connected with the driving structure, and the third connecting plate and the fourth connecting plate are respectively located on different sides of the second connecting plate.

4. The sofa telescopic bracket for preventing hand pinching according to claim 1, characterized in that: The fourth connecting plate is located at the outermost side of the connecting frame.

5. The sofa telescopic bracket for preventing hand pinching according to claim 1, characterized in that: The fourth connecting plate and the third connecting plate are both provided with a gap X in the thickness direction, and the gap X satisfies 1 mm <X<10mm。 6. The sofa telescopic bracket for preventing hand pinching according to claim 1, characterized in that: The auxiliary footrest is rotatably connected to the connecting frame through a linkage assembly, and the auxiliary footrest and the main footrest move simultaneously, so that the main footrest and the auxiliary footrest are moved to the outside of the iron frame for use or moved to the inside of the sofa for hiding; When the main footrest is hidden, the auxiliary footrest is located on the side of the main footrest close to the interior of the sofa, or, when the main footrest and the auxiliary footrest cooperate to support the legs, the auxiliary footrest is located on the side of the main footrest away from the iron frame.

7. The anti-pinch sofa telescopic bracket according to claim 6, characterized in that: The linkage components include: a first linkage plate and a second linkage plate, wherein the first linkage plate and the second linkage plate are rotatably mounted on the main footrest through a first rotating shaft and a second rotating shaft respectively; The third linkage plate is rotatably mounted on the first linkage plate via a third rotating shaft, and the middle portion of the third linkage plate is rotationally connected to the second linkage plate, the other end of the third linkage plate is used to be connected to the auxiliary footrest, and the third connecting plate is provided with a synchronization component which is connected to the first linkage plate and causes the first linkage plate to rotate.

8. The sofa telescopic support for preventing hand pinching according to claim 7, characterized in that: The first linkage plate and the second linkage plate are respectively located on different sides of the main footrest.

9. The sofa telescopic support for preventing hand pinching according to claim 7, characterized in that: The synchronization component includes: A first synchronizing plate, wherein the first synchronizing plate is arranged on the first linkage plate and is respectively located at two end sides of the first rotating shaft with the third linkage plate; The second synchronous plate is rotatably mounted on an end of the first synchronous plate away from the first rotating shaft and is rotatably connected to an end of the third connecting plate away from the first connecting plate.

10. The sofa telescopic support for preventing hand pinching according to claim 7, characterized in that: The main footrest is detachably provided with a bearing plate for rotationally connecting with the third connecting plate, the fourth connecting plate, the first linkage plate and the second linkage plate.

11. The anti-pinch sofa telescopic bracket according to claim 10, characterized in that: The third connecting plate and the first linkage plate are both provided with a bending portion away from the bearing plate for avoiding position, and the second synchronization plate is located on the side of the bending portion away from the bearing plate.

12. The sofa telescopic support for preventing hand pinching according to claim 7, characterized in that: The main footrest and the auxiliary footrest are in a hidden state, and the auxiliary footrest has no overlap with the linkage assembly in the lateral projection direction.

13. The sofa telescopic bracket for preventing hand pinching according to claim 1, characterized in that: The fourth connecting plate is provided with a first limiting component for limiting the position of the main footrest when in use, the first limiting component includes a first limiting column, and the second connecting plate is pressed against the first limiting column to position the telescopic bracket when in use; and / or, the second linkage plate is provided with a second limiting component for limiting the position of the auxiliary footrest when in use, the second limiting component includes a second limiting column, and the third linkage plate is pressed against the second limiting column to position the telescopic bracket when in use.

14. The anti-pinch sofa telescopic bracket according to claim 1, characterized in that: The first connecting plate and the second connecting plate are respectively connected to the two side walls of the iron frame which are opposite to each other, and the second connecting plate is provided with a bending section for avoiding position.

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