A support member

Abstract

The present invention relates to a support member. The support member comprises: a base body, in which a cavity is provided which passes through from top to bottom; a force-bearing device, which is movably provided in the cavity, and the top end of the force-bearing device extends out of the top end surface of the base body; a reset member is provided in the base body at the upper part of the cavity; a first matching part is provided at the bottom of the force-bearing device; an elevation structure, in which the upper part of the elevation structure extends into the lower part of the cavity in the base body, and the upper part of the elevation structure is rotatably connected with the bottom of the base body via a rotating shaft; a second matching part is provided at the upper part of the elevation structure; when there is or is no external force acting on the force-bearing device, the height of the base body on which the workpiece is placed can be raised through the above structural cooperation to form a height difference and improve the workpiece coating efficiency; the lifting device is easy to use, has a smooth working process, stable performance, and a low failure rate.

Description

Technical Field

[0001] The invention relates to a supporting member. Background Art

[0002] When existing woodworking machinery and woodworking panels are coated with films using ordinary laminating machines, the workpiece is placed on a pad that is slightly smaller than the workpiece, so that a height difference is formed between the bottom surface of the workpiece and the work plate surface, ensuring that when the workpiece is coated with PVC film, the PVC film can cling to and cross the bottom edge of the workpiece to cover the bottom surface of the workpiece, ensuring that the workpiece is edged smoothly. Due to the wide variety of workpieces and different sizes, pads of different sizes need to be made according to different types of workpieces, resulting in a waste of resources, and frequent replacement of pads also affects work efficiency.

[0003] At present, the domestic laminating machine workbench uses photoelectric sensor actuators to control the automatic rise of the pads used to support the workpiece, but due to the need for scanning and positioning and high automation requirements, the installation cost is expensive, which is not conducive to installation and use by small and medium-sized enterprises. In recent years, there have also been working pads for laminating machines on the market that rely on their own structure and gravity to cooperate with each other to achieve rotation, but due to the complex mechanism design, the working pads are prone to problems such as unsmooth movement, easy jamming, reset offset, easy damage to internal parts, high failure rate, and short service life during rotation, which interferes with the normal operation of the laminating machine. Summary of the invention

[0004] The present invention provides a support member, which innovates the existing pad system for the worktable of the laminating machine. The lifting device facilitates the laminating operation of the workpiece by flexibly converting between the non-working state and the working state. The switching between the original state and the working state of the support member is simple to operate, easy to use, has a smooth working process, stable performance, and a low failure rate, which solves the problems existing in the prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A support member, comprising:

[0007] A base body, wherein upper and lower cavities are provided in the base body, and a through groove is provided at the bottom of the base body;

[0008] A force-bearing device is movably arranged in the cavity, and the top of the force-bearing device extends out of the top surface of the base body; a reset member is arranged in the base body at the upper part of the cavity; the force-bearing device is always subjected to the upward elastic force of the reset member; and a first matching portion is arranged at the bottom of the force-bearing device;

[0009] An increasing structure, wherein the upper portion of the increasing structure extends into the through slot and is rotatably connected to the base body in the through slot; a second matching portion is provided on the increasing structure;

[0010] When there is no external force acting on the force-bearing device, the first matching part and the second matching part cooperate to make the vertical axis of the height-increasing structure and the vertical axis of the force-bearing device form an acute angle; when the force-bearing device is subjected to external force, the first matching part and the second matching part separate to make the vertical axis of the height-increasing structure coincide with the vertical axis of the force-bearing device.

[0011] Furthermore, when the force-bearing device is not subjected to external force, the first matching part is supported by the reset part and has a first position in the cavity. When the force-bearing device is subjected to external force, the first matching part has a second position in the cavity due to the contraction of the reset part. When the first matching part is in the first position, it cooperates with the second matching part so that the vertical axis of the height-increasing structure and the vertical axis of the force-bearing device are arranged at an acute angle. When the first matching part is in the second position, the first matching part is separated from the second matching part, and the height-increasing structure rotates to coincide with the vertical axis of the base body. At this time, the height-increasing structure serves to extend the length of the base body.

[0012] Furthermore, a rotating shaft is fixed in the through slot, and the upper portion of the height-increasing structure is rotatably connected to the base body at the position of the through slot via the rotating shaft.

[0013] Furthermore, the cavity includes an upper cavity and a lower cavity, and the upper and lower cavities are separated by a stepped surface; the reset member is arranged in the upper cavity; the force-bearing device includes a force-bearing rod arranged in the upper cavity and a first matching part arranged in the lower cavity, and the top end of the first matching part is fixedly connected to the bottom end of the force-bearing rod.

[0014] Furthermore, the first matching portion is connected to the bottom end of the force-bearing rod in an integral manner or in a split and detachable manner.

[0015] Furthermore, the height-increasing structure is a top block; the top block is rotatably connected to the base body via a rotating shaft arranged in the through groove; the second matching portion is an arc-shaped groove arranged on one side or both sides of the upper part of the top block, and a notch is arranged on the arc-shaped groove; a protrusion that slidably cooperates with the inner side wall of the arc-shaped groove is arranged at the bottom end of the first matching portion; when the vertical axis of the height-increasing structure forms an acute angle with the vertical axis of the force-bearing device, the protrusion is located in the arc-shaped groove, and when the vertical axis of the height-increasing structure coincides with the vertical axis of the force-bearing device, the protrusion is located in the notch.

[0016] Furthermore, the arc-shaped groove is a circular groove or an elliptical groove.

[0017] Furthermore, the height-increasing structure is a top block; the top block is rotatably connected to the base body via a rotating shaft arranged in the through groove; the second matching portion is a circular groove arranged on one side or both sides of the upper part of the top block, and a notch is arranged on the circular groove; the top surface of the top block close to the notch is an arc-shaped top surface; a protrusion that slidably matches with the inner side wall of the circular groove is arranged at the bottom end of the first matching portion; when the first matching portion is in the first position, the protrusion abuts against the outer side wall of the circular groove on the notch side, and when the first matching portion is in the second position, the top block rotates until its top surface is in contact with the top wall of the through groove, and at this time, the bottom surface of the protrusion is gap-matched with the top surface of the rotating shaft.

[0018] Furthermore, the bottom surface of the protrusion is arranged as an inner arc surface; preferably, the bottom surface of the protrusion is arranged as an inner arc surface matching with the top surface of the rotating shaft.

[0019] Furthermore, the bottom surface of the protrusion is set to an upwardly concave arc surface. When the first matching portion is in the second position, this structure can ensure that the bottom surface of the protrusion is matched with the top of the shaft, so that the protrusion and the shaft can better contact and fit together.

[0020] Furthermore, the arc-shaped top surface on one side of the top block can ensure that when the square top block rotates in the through slot, it can achieve free rotation from a horizontal state to a clockwise rotation of 90°, and when the top block is in a horizontal state and a vertical state, its side wall fits with the bottom wall of the base body above the through slot.

[0021] Furthermore, the second matching part is a circular groove relatively arranged on the two side surfaces of the top block, and the notches are relatively arranged on each circular groove; the first matching part is a frame with an opening at the bottom end, and the two protrusions are relatively arranged on the inner side of the bottom end of the frame.

[0022] Furthermore, the middle portion of the top end of the frame is integrally fixedly connected to the bottom end of the force-bearing rod.

[0023] Furthermore, a limiting sub-cavity is formed by expanding the lower cavity inside and outside to allow the frame to move freely upward and downward.

[0024] The position-limiting auxiliary cavity is two oppositely arranged inwardly concave vertical semicircular grooves arranged outside the lower cavity of the base body, and the frame moves up and down along the vertical semicircular grooves during the up and down movement of the force-bearing rod. The position-limiting auxiliary cavity can limit the rotation or shaking of the frame in the circumferential direction in the lower cavity when it moves up and down.

[0025] Furthermore, the second matching part is a circular groove arranged on one side of the top block, and the notch is arranged on the circular groove; the first matching part is a frame with an opening arranged at the bottom end, and the protrusion is arranged on the inner side of the bottom end of one side of the frame, and the inner side of the bottom end on the other side of the frame is gap-matched with the other side of the top block.

[0026] Furthermore, an auxiliary piece is fixedly connected to the inner side of the bottom end of the other side of the frame, and the inner side surface of the auxiliary piece is gap-matched with a side surface of the height-increasing structure without the circular groove.

[0027] Furthermore, a blocking cover is provided at the top of the cavity of the base body, and the top of the force-bearing device extends out of the blocking cover; the blocking cover is used to limit the force-bearing device from escaping upward from the cavity of the base body; and the reset member is a reset spring.

[0028] Furthermore, the bottom end of the reset spring abuts against the stepped surface between the upper and lower cavities, the top end of the reset spring abuts against the bottom surface of the barrier portion provided on the upper part of the force-bearing rod, and the barrier portion abuts against the bottom end of the blocking cover.

[0029] Furthermore, the top block is a square top block.

[0030] Furthermore, the frame is a square frame with an opening at the bottom.

[0031] Furthermore, the barrier portion is an annular barrier portion.

[0032] The annular barrier portion is used to limit the force-bearing rod from detaching upward from the blocking cover.

[0033] Furthermore, the annular spacer portion is an elastic retaining ring.

[0034] Beneficial effects of the present invention:

[0035] The present invention innovates the existing pad system for the laminating machine workbench. The lifting device can flexibly switch between the original state and the working state to facilitate the lifting of the workpiece for laminating operation. When the lifting device is in the non-working state, the heightening structure is set at an acute angle with the base body. Once the force-bearing rod bears the pressure of the workpiece placed thereon, the heightening structure rotates to a vertical state under the action of the force-bearing rod and the reset spring. At this time, one side of the top surface of the heightening structure abuts against the inner bottom surface of the base (i.e., one side of the top wall of the through groove), and the heightening structure remains in a vertical state, which is convenient for subsequent lifting operations. The lifting device has a scientific and reasonable structural design, is simple to operate, easy to use, has a smooth working process, is not prone to jamming, has stable performance, and has a low failure rate, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the structure of the original state when not in operation of Embodiment 1 of the present invention;

[0037] Figure 2 This is a schematic diagram of the working state structure of Example 1 of the present invention under the action of workpiece pressure;

[0038] Figure 3 for Figure 2 AA section structural diagram;

[0039] Figure 4A schematic diagram of a structure in which a height difference is formed with a lifting device without workpiece pressure outside when the embodiment 1 of the present invention is in working state;

[0040] Figure 5 This is a schematic structural diagram of a force bearing device according to Embodiment 1 of the present invention;

[0041] Figure 6 for Figure 5 Schematic diagram of longitudinal cross-section structure;

[0042] Figure 7 A schematic structural diagram of a square top block according to Embodiment 1 of the present invention;

[0043] Figure 8 for Figure 7 Side view of the structure;

[0044] Fig. 9 This is a schematic diagram of the structure of withdrawing a workpiece and restoring the original working state in Example 1 of the present invention;

[0045] Fig.10 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0046] Fig.11 This is a schematic structural diagram of a force bearing device according to Embodiment 2 of the present invention;

[0047] Fig.12 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0048] Fig.13 This is a schematic diagram of the structure of the force-bearing device of Example 3 of the present invention.

[0049] Among them, 1 is a base body, 2 is an upper cavity, 3 is a lower cavity, 3.1 is a limiting sub-cavity, 4 is a force-bearing rod, 5 is a blocking cover, 6 is an elastic retaining ring for the shaft, 7 is a reset spring, 8 is a square frame, 8.1 is a vertical rod, 8.2 is a horizontal rod, 9 is a protrusion, 10 is a rotating shaft, 11 is a square top block, 12 is a circular groove, 13 is a notch, 14 is a through groove, 15 is a short protrusion, and 16 is an auxiliary sheet. DETAILED DESCRIPTION

[0050] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods.

[0051] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0052] Example 1

[0053] like Figure 1-9 As shown, the support is used to be installed on the working table of the laminating machine, and can make the workpiece placed thereon to be padded and raised in height during the laminating operation. The lifting device includes a base body 1, which is the main body of the cushion block that can lift the workpiece. The base body 1 of the lifting device is installed on the working table of the laminating machine; an upper and lower through cavity is set in the base body 1, and the cavity includes an upper cavity 2 and a lower cavity 3, and the upper and lower cavities are separated by a stepped surface; a force-bearing device is movably installed in the cavity, and the force-bearing device includes a force-bearing rod 4 arranged in the upper cavity, the top end of the force-bearing rod extends out of the top end of the base body, and is used to contact the workpiece and feel the pressure of the workpiece, and the bottom end of the force-bearing rod extends into The upper part of the lower cavity 3 is provided; a stop cover 5 is provided in the base body at the top of the upper cavity, the stop cover 5 is fixed to the top of the cavity in the base body, an elastic circlip 6 for shaft is fixed on the force-bearing rod below the stop cover, a return spring 7 is provided between the elastic circlip for shaft and the stepped surface in the cavity, the top end of the return spring abuts against the bottom surface of the elastic circlip for shaft, and the bottom end of the return spring abuts against the top surface of the stepped surface between the upper and lower cavities; the stop cover cooperates with the elastic circlip for shaft and the return spring to limit the force-bearing rod from escaping from the cavity in the base body. When the force-bearing rod is not subjected to the pressure of the workpiece above, the upward supporting elastic force of the return spring causes the top surface of the elastic circlip for shaft on the force-bearing rod to abut against the bottom surface of the stop cover.

[0054] A square frame 8 is fixedly connected to the bottom end of the force-bearing rod, and an opening is set at the bottom end of the square frame. The square frame includes two vertical rods 8.1 and a horizontal rod 8.2 fixedly connected to the top ends of the two vertical rods. The middle part of the horizontal rod is connected to the bottom end of the force-bearing rod. A limiting sub-cavity 3.1 is set in the lower cavity to cooperate with the two vertical rods of the square frame. The limiting sub-cavity is set as a concave groove structure. With such a configuration, under the action of the reset spring 7, the up and down movement of the force-bearing rod will drive the square frame to move freely up and down along the limiting sub-cavity 3.1, which can avoid the rotation of the square frame in the horizontal circumferential direction and ensure its stable up and down movement. Two protrusions 9 are relatively set on the inner side of the bottom end of the square frame. The upward inner arc of the bottom end of the protrusion can match the top surface of the rotating shaft, such as Figure 5 , Figure 6 The top surface of the raised portion may be a smooth curved surface.

[0055] A through slot 14 is provided at the bottom of the base body, and a rotating shaft 10 is fixed in the through slot 14. The upper part of the height-increasing structure is rotatably connected to the base body at the through slot position via the rotating shaft 10. The height-increasing structure is a square top block 11 that can be used to raise the workpiece. The two ends of the rotating shaft 10 used to support the square top block are fixedly connected to the inner side wall of the through slot at the bottom of the base body. Two circular grooves 12 are arranged on the two side walls of the upper part of the square top block, and each circular groove is correspondingly provided with a notch 13, which is arranged at the upper right side of the circular groove 12. The aforementioned protrusion can be slidably matched with the inner side wall of the circular groove. The right side of the top surface of the square top block, that is, the top surface of the square top block close to the notch is set in a smooth arc surface, and the left side of the top surface of the square top block is still a plane; the notch, the circular groove and the arc surface setting on one side of the top surface of the square top block can ensure that: when the force-bearing rod is not subjected to external force, the square top block is in an inclined state as a whole, that is, in the original state of forming an acute angle with the vertical axis of the base body. At this time, one side of the protrusion is just located on the upper side of the notch and is aligned with the outer wall of the circular groove on this side (such as Figure 7 and Figure 8 When the force-bearing rod is subjected to the external force of the workpiece pressing down, the square frame body where the protrusion is located is acted upon by the reset spring and the force-bearing rod, moves downward along the limiting sub-cavity 3.1 and slides into the circular groove of the square top block. During the gradual downward movement of the square frame body 8, the square top block 11 is no longer restricted, and rotates clockwise through the shaft until the left side of its top surface abuts and fits on the top wall of the through groove 14, thereby achieving the coincidence of the vertical axis of the square top block 11 with the base body. At this time, the bottom surface of the protrusion cooperates with the top surface of the shaft, and the square top block maintains the vertical state. Once the external force on the workpiece borne by the top of the force-bearing rod disappears, the reset spring supports and drives the force-bearing rod to move upward, and the square frame gradually moves upward along the limiting sub-cavity 3.1 to the top wall position of the circular groove of the square top block. Under the external force of the reset device under the workbench, the square top block rotates counterclockwise, and the raised portion of the square frame gradually slides along the inner wall of the circular groove to the notch. Under the upward stretching action of the reset spring, the raised portion of the square frame stays on one side of the notch. At this time, the outer wall of the circular groove at the notch position of the square top block 11 and the raised portion of the square frame abut together, forming a barrier for the square top block to limit its further rotation, so that the square top block recovers and maintains its original inclined state.

[0056] When in use, multiple lifting devices of Example 1 of the present invention can be installed according to the size of the workbench area of ​​each laminating machine. For example, the workbench area of ​​a standard laminating machine is 1320mm×2580mm, and the area occupied by each lifting device is 30mm×30mm, so each workbench uses 3572 lifting devices of Example 1 of the present invention. The lifting device of Example 1 of the present invention can be installed on the workbench. When no workpiece is placed, the lifting device is in the original state, such as Figure 1At this time, the square top block is in an inclined state, that is, its vertical axis is set at an acute angle with the vertical axis of the base body. When working, the workpiece to be coated is placed on the base body of the workbench, and the force-bearing device on the base body covered by the workpiece is pressed down. Therefore, the square top block under the base body that bears the pressure of the workpiece loses its contact with the raised part of the square frame under the force-bearing rod, and rotates clockwise to the vertical direction until the left side of its top surface fits with the top wall of the through groove and stops. Figure 2 , Figure 3 The workbench enters the main machine, the lower tray rises to close the mold, the base body on which the workpiece is placed rises, and the base body forms a height difference, such as Figure 4 , the workpiece is raised to facilitate the laminating operation on its side. After the laminating procedure is completed, the workbench comes out, the workpiece is removed, the force rod rises, the raised part of the square frame presses against the top wall of the circular groove, and under the reset thrust of the reset device under the workbench, the square top block rotates counterclockwise, and the raised part of the square frame slides along the inner wall of the circular groove until the raised part of the square frame turns into the position on the notch side of the circular groove, the square top block presses against the raised part of the square frame and stops rotating, restoring the original tilting state; entering the next working cycle.

[0057] Example 2

[0058] like Figure 10-11 As shown, the support member is the same as the support member of Example 1, except that the circular groove 12 on the square top block is only provided on one side thereof, and a notch 13 is provided on the circular groove on the side; thus, in order to ensure that the square frame below the force-bearing rod cooperates stably with the circular groove, the structure of the square frame is changed, that is, a protrusion is provided on the inner side of the bottom end of one side of the square frame, and a short protrusion 15 that cooperates with the clearance of the other side of the square top block is provided on the inner side of the bottom end of the other side of the square frame.

[0059] When in use, the lifting device of this embodiment can be installed on the workbench. When there is no workpiece placed, the lifting device is in the original state. At this time, the square top block 11 is in an inclined state, that is, its vertical axis is set at an acute angle with the vertical axis of the base body. During operation, the workpiece to be coated is placed on the base body of the workbench, and the force-bearing device on the base body covered by the workpiece is pressed down. The side of the square top block under the base body that bears the pressure of the workpiece loses the abutment with the side of the square frame under the force-bearing rod. The square top block rotates clockwise to the vertical direction and stops until the left side of its top surface fits with the top wall of the through groove. At this time, the square top block is vertically consistent with the base body. The workbench enters the main machine, the lower tray rises to close the mold, the base body with the workpiece placed is raised, and the base body forms a height difference. The workpiece is raised, which is convenient for the side coating operation. After the laminating procedure is completed, the workbench comes out, the workpiece is removed, the force-bearing rod rises, and the raised portion on one side of the square frame body presses upward against the top wall position of the circular groove on one side of the square top block, and the short raised portion on the other side of the square frame body is always matched with the gap of the side of the square top block during the rotation of the square top block. Under the reset thrust of the reset device under the workbench, the square top block rotates counterclockwise until the raised portion on one side of the square frame body turns into the notch position of the circular groove on that side. The square top block is blocked by the clockwise rotation and stops rotating, and returns to its original tilted state; entering the next working cycle.

[0060] Example 3

[0061] like Figure 12-13 As shown, the support member is the same as the support member of Example 2, except that, in order to ensure a good fit between the square top block and the square frame and to avoid shaking and tilting in a direction perpendicular to the rotation direction of the square top block when the square top block rotates, an auxiliary piece 16 can be provided on the inner side of the short protrusion 15 at the bottom end of the other side of the square frame, corresponding to the side of the square top block without a circular groove, for fitting the side of the square top block over a larger area; of course, the auxiliary piece is provided on the outside of the limiting sub-cavity 3.1, and the additional auxiliary piece can increase the contact area between the auxiliary piece and the side of the square top block, thereby ensuring stability and non-shaking during the rotation of the square top block.

[0062] The process of use is the same as that of Example 2 and will not be described in detail here.

[0063] The above specific implementation manner cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art, any substitution, improvement or change made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0064] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A support member, characterized in that: include: A base body, wherein upper and lower cavities are provided in the base body, and a through groove is provided at the bottom of the base body; A force-bearing device is movably arranged in the cavity, and the top of the force-bearing device extends out of the top surface of the base body; a reset member is arranged in the base body at the upper part of the cavity; the force-bearing device is always subjected to the upward elastic force of the reset member; and a first matching portion is arranged at the bottom of the force-bearing device; An increasing structure, wherein the upper portion of the increasing structure extends into the through slot and is rotatably connected to the base body in the through slot; a second matching portion is provided on the increasing structure; When the force-bearing device is not acted upon by external force, the first matching portion and the second matching portion match to make the vertical axis of the height-increasing structure and the vertical axis of the force-bearing device form an acute angle; when the force-bearing device is subjected to external force, the first matching portion and the second matching portion separate to make the vertical axis of the height-increasing structure coincide with the vertical axis of the force-bearing device; A stop cover is provided at the top of the cavity of the base body, and the top of the force-bearing device passes through the stop cover; the stop cover is used to limit the force-bearing device from escaping upward from the cavity of the base body; The cavity comprises an upper cavity and a lower cavity, and the upper and lower cavities are separated by a stepped surface; the reset member is arranged in the upper cavity; the force-bearing device comprises a force-bearing rod arranged in the upper cavity and a first matching portion arranged in the lower cavity, and the top end of the first matching portion is fixedly connected to the bottom end of the force-bearing rod; The height-increasing structure is a top block; the top block is rotatably connected to the base body via a rotating shaft arranged in the through groove; the second matching portion is a circular groove arranged on the upper part of the top block, and a notch is arranged on the circular groove; the top surface of the top block close to the notch is an arc-shaped top surface; a protrusion that slidably matches with the inner side wall of the circular groove is arranged at the bottom end of the first matching portion; when there is no external force acting on the force-bearing device, the protrusion abuts against the outer side wall of the circular groove on one side of the notch, and when the force-bearing device is subjected to external force, the top block rotates until its top surface fits with the top wall of the through groove, and at this time, the bottom surface of the protrusion and the top surface of the rotating shaft are clearance-matched; The second matching part is a circular groove arranged on two sides of the top block, and the notches are arranged on each circular groove; the first matching part is a frame with an opening at the bottom, and the two protrusions are arranged on the inner side of the bottom of the frame; or The second matching part is a circular groove arranged on one side of the top block, and the notch is arranged on the circular groove; the first matching part is a frame with an opening arranged at the bottom end, and the protrusion is arranged on the inner side of the bottom end of one side of the frame, and the inner side of the bottom end on the other side of the frame is gap-matched with the other side of the top block; an auxiliary piece is fixedly connected to the inner side of the bottom end on the other side of the frame, and the inner side surface of the auxiliary piece is gap-matched with a side surface of the height-increasing structure without the circular groove.

2. The support member according to claim 1, characterized in that The bottom surface of the protrusion is arranged as an inner arc surface matching with the top surface of the rotating shaft.

3. The support member according to claim 1, characterized in that: A limiting sub-cavity is formed by expanding inside and outside the lower cavity to allow the frame to move freely upward and downward.

4. The support member according to claim 1, characterized in that The reset element is a reset spring.

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