An electric massage bed

Abstract

The utility model discloses an electric massage bed, including bed body, lifting mechanism, chassis and moving mechanism, lifting mechanism is connected in the lower side of bed body, and lifting mechanism is used for raising or lowering bed body, chassis is connected in lifting mechanism, and chassis is used for supporting lifting mechanism, and moving mechanism includes a plurality of telescopic components and a plurality of universal castors, and a plurality of universal castors are connected in the lower end of a plurality of telescopic components correspondingly, and the upper end of a plurality of telescopic components is connected in the both ends of chassis, the utility model discloses utilize moving mechanism to be convenient for the carrying movement of electric massage bed implementation.

Description

Technical Field

[0001] This utility model relates to the field of massage bed manufacturing technology, and in particular to an electric massage bed. Background Technology

[0002] An electric massage bed is a type of bed used in the beauty and massage industry, allowing the client to lie on it and facilitating massage or manipulation by the therapist. Current electric massage beds utilize electric push rods to adjust the bed's position, precisely adapting to the needs of facial massage, facial care, and body manipulation, while also allowing the client to easily climb in and out. In some applications, there is a need to move the electric massage bed to change the layout, and there is also a need to periodically move the bed for better floor disinfection and cleaning. Current electric massage bed mattresses often use high-density foam filling, covered with nano-grade stain-resistant leather or microfiber genuine leather, making the surface elastic and soft, providing a comfortable lying experience. However, this also makes it difficult to move and maneuver, hindering the ability to reposition the bed. Furthermore, the presence of electric push rods, lifting frames, and other components makes electric massage beds relatively heavy, further increasing the difficulty of moving them. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an electric massage bed, which utilizes a moving mechanism to facilitate the transport and movement of the electric massage bed.

[0004] An electric massage bed according to an embodiment of the present utility model includes:

[0005] Bed frame;

[0006] The lifting mechanism is connected to the underside of the bed and is used to raise or lower the bed.

[0007] The base frame is connected to the lifting mechanism and is used to support the lifting mechanism.

[0008] The moving mechanism includes multiple telescopic components and multiple swivel casters. The multiple swivel casters are connected to the lower ends of the multiple telescopic components, and the upper ends of the multiple telescopic components are connected to both ends of the base frame.

[0009] An electric massage bed according to an embodiment of the present utility model has at least the following beneficial effects:

[0010] The telescopic assembly allows the swivel casters to be easily extended to the bottom of the base, facilitating movement of the electric massage bed. No multiple people are needed to move the massage bed; a single person can operate the extended assembly and use the casters to move it. When moving the massage bed, the operator does not need to grasp the mattress and apply force; simply pushing the side of the massage bed is sufficient. This moving mechanism facilitates the transport and relocation of the massage bed, allowing staff to adjust its position within the space and enabling regular cleaning and disinfection of the floor.

[0011] According to an embodiment of the present utility model, an electric massage bed has a telescopic component including a first connecting cylinder, a second connecting cylinder, and a damping module. The first connecting cylinder is connected to the base frame, the second connecting cylinder is movably inserted inside the first connecting cylinder, the lower end of the second connecting cylinder is connected to a universal caster, and the damping module is disposed between the first connecting cylinder and the second connecting cylinder.

[0012] According to an embodiment of the present invention, an electric massage bed includes a damping module comprising a damper and a damping sleeve. The damper is movably inserted into the damping sleeve. The damper is connected to the top end inside the first connecting cylinder, and the damping sleeve is connected to the upper part of the second connecting cylinder.

[0013] According to an embodiment of the present invention, an electric massage bed has a damping sleeve fixedly connected to the inner side of the upper part of the second connecting cylinder.

[0014] According to an embodiment of the present invention, an electric massage bed is provided with a connecting frame between the second connecting cylinders of multiple telescopic components, and the connecting frame is fixedly connected to the multiple second connecting cylinders respectively.

[0015] According to an embodiment of the present invention, an electric massage bed includes a moving mechanism that further includes multiple foot pedals, which are fixedly connected to a connecting frame.

[0016] An electric massage bed according to an embodiment of the present invention further includes an angle adjustment mechanism. The bed body includes a back cushion and a seat cushion, with adjacent ends of the back cushion and the seat cushion hinged together. The angle adjustment mechanism is connected to the back cushion and the seat cushion respectively, and is used to adjust the angle of the back cushion relative to the seat cushion.

[0017] According to an embodiment of the present invention, an electric massage bed has an angle adjustment mechanism including a first electric push rod and a first eccentric mounting plate. The base of the first electric push rod is rotatably connected to the seat cushion, and the output end of the first electric push rod is rotatably connected to the first eccentric mounting plate. The first eccentric mounting plate is fixedly mounted on one end of the back cushion near the seat cushion.

[0018] According to an embodiment of the present utility model, an electric massage bed includes a bed frame and a lifting mechanism including a lifting drive module and two rotating brackets. The bottom ends of the two rotating brackets are rotatably connected to the base frame, and the top ends of the two rotating brackets are rotatably connected to the bed frame. The lifting drive module is connected to the two rotating brackets and is used to drive the rotating brackets to rotate to change the height difference between their two ends.

[0019] According to an embodiment of the present invention, an electric massage bed includes a lifting drive module comprising a second electric push rod, a transmission frame, and two second eccentric mounting plates. The base of the second electric push rod is rotatably connected to the base frame, and the output end of the second electric push rod is rotatably connected to the transmission frame. The transmission frame is rotatably connected to the two second eccentric mounting plates, which are correspondingly mounted on the bottom sides of two rotating supports.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the structure of an electric massage bed according to an embodiment of the present utility model;

[0023] Figure 2 This is a front view of an electric massage bed according to an embodiment of the present utility model;

[0024] Figure 3 This is a front view of an electric massage bed with its universal casters in the lowered position, according to an embodiment of the present invention.

[0025] Figure 4 This is a front view of the telescopic component of an electric massage bed according to an embodiment of the present utility model;

[0026] Figure 5 This is a cross-sectional view of the telescopic component of an electric massage bed according to an embodiment of the present utility model;

[0027] Figure 6 This is a right view of an electric massage bed according to an embodiment of the present utility model;

[0028] Figure 7 This is a right view of an electric massage bed in its raised state according to an embodiment of the present invention;

[0029] Figure 8 This is a right view of an electric massage bed according to an embodiment of the present invention, showing the hand pad in the lowered position.

[0030] Explanation of reference numerals in the attached figures:

[0031] Bed frame 100; backrest 110; seat cushion 120; handrest 130; parallel four-bar support 131; gas lift 132; gas lift handle 133; bed frame 140; toilet paper holder 150;

[0032] Lifting mechanism 200; Lifting drive module 210; Second electric push rod 211; Transmission frame 212; Second eccentric mounting plate 213; Rotating bracket 220;

[0033] Frame 300;

[0034] Moving mechanism 400; first connecting cylinder 410; second connecting cylinder 420; damping module 430; damper 431; damping sleeve 432; swivel caster 440; connecting frame 450; foot pedal 460;

[0035] Angle adjustment mechanism 500; First electric push rod 510; First eccentric mounting plate 520;

[0036] Control box 600. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 limitations on this utility model.

[0039] In the description of a utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first" and "second" are used, they are merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or the order of the indicated technical features.

[0040] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0041] Reference Figures 1 to 8 This utility model embodiment provides an electric massage bed, including a bed body 100, a lifting mechanism 200, a base frame 300, and a moving mechanism 400. The lifting mechanism 200 is connected to the lower side of the bed body 100 and is used to raise or lower the bed body 100 relative to the ground. The base frame 300 is connected to the lifting mechanism 200 and is used to support the lifting mechanism 200 to bear the weight of the lifting mechanism 200 and the bed body 100. The moving mechanism 400 includes multiple telescopic components and multiple universal casters 440. The multiple universal casters 440 are correspondingly connected to the lower ends of the multiple telescopic components and the upper ends of the multiple telescopic components. The telescopic assembly is connected to both ends of the base frame 300. Specifically, the telescopic assembly can extend and retract in the height direction. When the telescopic assembly is in the extended state, multiple swivel casters 440 connected to the lower end of the telescopic assembly can be extended to the bottom of the base frame 300. At this time, the bottom of the swivel casters 440 is located below the bottom of the base frame 300, and the multiple swivel casters 440 serve as support points for the electric massage bed, facilitating the movement of the electric massage bed. Specifically, when the telescopic assembly is in the retracted state, the multiple swivel casters 440 can be retracted. At this time, the bottom of the swivel casters 440 is located above the bottom of the base frame 300, and the base frame 300 serves as a support point for the electric massage bed. At this time, the electric massage bed cannot be moved and can achieve a good positional fixation effect.

[0042] The telescopic assembly allows the swivel casters 440 to be easily extended to the bottom of the base, serving as support points for the electric massage bed. The casters' rolling characteristic facilitates easy movement of the electric massage bed. No multiple people are needed to move the electric massage bed; a single person can operate the telescopic assembly to extend the casters 440 and move the bed. When moving the electric massage bed, the operator does not need to grasp the mattress and apply force; simply pushing the side of the bed is sufficient. The moving mechanism 400 facilitates the transport and movement of the electric massage bed, allowing staff to reposition it to change the layout of the space and enabling regular relocation for better floor disinfection and cleaning.

[0043] According to some embodiments of this application, refer to Figure 4 and Figure 5The telescopic assembly includes a first connecting cylinder 410, a second connecting cylinder 420, and a damping module 430. The first connecting cylinder 410 is connected to the base frame 300, and the second connecting cylinder 420 is movably inserted inside the first connecting cylinder 410. A swivel caster 440 is connected to the lower end of the second connecting cylinder 420. The damping module 430 is disposed between the first connecting cylinder 410 and the second connecting cylinder 420. Specifically, both the first connecting cylinder 410 and the second connecting cylinder 420 are arranged along the height direction. The first connecting cylinder 410, fixedly connected to the base frame 300, guides the vertical movement of the second connecting cylinder 420, allowing it to move downwards or upwards to achieve the extension and retraction of the telescopic assembly. Specifically, the damping module 430 can extend or retract and can maintain itself in either the extended or retracted state. When the damping module 430 is in the extended state, it pushes the second connecting cylinder 420 to move relatively out of the first connecting cylinder 410. At this time, the telescopic assembly is in the extended state, and the swivel caster 440 is in the lowered state. (Refer to...) Figure 3 When the damping module 430 is in the shortened state, it pulls the second connecting cylinder 420 back into the interior of the first connecting cylinder 410. At this time, the telescopic assembly is in the shortened state, and the swivel caster 440 is in the retracted state. (Refer to...) Figure 2 .

[0044] Furthermore, the damping module 430 includes a damper 431 and a damping sleeve 432. The damper 431 is movably inserted into the damping sleeve 432. The first connecting cylinder 410 is a closed-top cylinder. The damper 431 is connected to the top end inside the first connecting cylinder 410, and the damping sleeve 432 is connected to the upper part of the second connecting cylinder 420. The damper 431 and the damping sleeve 432 are connected by an interference fit. Utilizing the friction between the damper 431 and the damping sleeve 432, the damping module 430 can be maintained in an extended or shortened state.

[0045] Furthermore, the damping sleeve 432 is fixedly connected to the inner side of the upper part of the second connecting cylinder 420. Specifically, the top end of the damper 431 is connected to the top end inside the first connecting cylinder 410. The friction between the damper 431 and the damping sleeve 432 can limit the tendency of relative movement between the first connecting cylinder 410 and the second connecting cylinder 420, so as to maintain the stability of the relative position between the second connecting cylinder 420 and the first connecting cylinder 410. A relatively large force is required to make relative movement between the damper 431 and the damping sleeve 432 occur. The damping sleeve 432 is fixedly connected to the inner side of the upper part of the second connecting cylinder 420, and the damper 431 is movably inserted into the damping sleeve 432, which can shorten the overall height of the telescopic assembly, so as to better connect between the base frame 300 and the swivel caster 440.

[0046] According to some embodiments of this application, refer to Figures 6 to 8A connecting frame 450 is provided between the second connecting cylinders 420 of the multiple telescopic components, and the connecting frame 450 is fixedly connected to the multiple second connecting cylinders 420 respectively. Using the connecting frame 450, the second connecting cylinders 420 of the multiple telescopic components can be moved relative to the first connecting cylinder 410 at the same time, so that the multiple second connecting cylinders 420 can be extended into the outside or retracted relative to the first connecting cylinder 410 simultaneously.

[0047] Furthermore, the moving mechanism 400 also includes multiple foot pedals 460, which are fixedly connected to the connecting frame 450. When the foot pedals 460 are pushed downward, the connecting frame 450 is also moved downward, which in turn moves the multiple second connecting cylinders 420 downward.

[0048] According to some embodiments of this application, refer to Figures 6 to 8 It also includes an angle adjustment mechanism 500. The bed 100 includes a back cushion 110 and a seat cushion 120. The adjacent ends of the back cushion 110 and the seat cushion 120 are hinged together. The angle adjustment mechanism 500 is connected to the back cushion 110 and the seat cushion 120 respectively. The angle adjustment mechanism 500 is used to adjust the angle of the back cushion 110 relative to the seat cushion 120 so that the person being massaged can lie on the bed 100 or sit on the bed 100.

[0049] Furthermore, the angle adjustment mechanism 500 includes a first electric push rod 510 and a first eccentric mounting plate 520. Figure 7 (Indicated by the dashed line) The base of the first electric push rod 510 is rotatably connected to the seat cushion portion 120. The output end of the first electric push rod 510 is rotatably connected to the first eccentric mounting plate 520. The first eccentric mounting plate 520 is fixedly mounted on the back cushion portion 110 near the seat cushion portion 120. The pushing force direction of the first electric push rod 510 and the connection between the first eccentric mounting plate 520 and the back cushion portion 110 are not on the same straight line. When the first electric push rod 510 pushes the first eccentric mounting plate 520, an eccentric force is generated at the rotatable connection between the output end of the first electric push rod 510 and the first eccentric mounting plate 520, thereby pushing the first eccentric mounting plate 520 to rotate about the hinge point between the back cushion portion 110 and the seat cushion portion 120. The first eccentric mounting plate 520 drives the back cushion portion 110 to rotate relative to the seat cushion portion 120. When the first eccentric mounting plate 520 rotates, the position of its rotating connection with the output end of the first electric push rod 510 also changes. This process will cause the first electric push rod 510 to rotate together. Since the base of the first electric push rod 510 is rotatably connected to the seat cushion 120, when the first electric push rod 510 rotates, its base can always be connected to the seat cushion 120.

[0050] According to some embodiments of this application, refer to Figure 1 , Figure 6 , Figure 7and Figure 8 The bed frame 100 includes a bed frame 140, and the lifting mechanism 200 includes a lifting drive module 210 and two rotating supports 220. The bottom ends of the two rotating supports 220 are rotatably connected to the base frame 300, and the top ends of the two rotating supports 220 are rotatably connected to the bed frame 140. The lifting drive module 210 is connected to the two rotating supports 220 and is used to drive the rotating supports 220 to rotate to change the height difference between their two ends. Specifically, the two rotating supports 220, the bed frame 140, and the base frame 300 together form a parallel four-bar linkage. Since the position of the base frame 300 is fixed, when the two rotating supports 220 rotate relative to the base frame 300, they can drive the upper bed frame 140 to move obliquely upward to change the height difference between the base frame 300 and the bed frame 140. The bed frame 140 remains parallel to the base frame 300 during the upward movement. The lifting drive module 210 drives the rotating bracket 220 to rotate, thereby changing the height difference between its two ends, which in turn changes the height difference between the base frame 300 and the bed frame 140.

[0051] Furthermore, the lifting drive module 210 includes a second electric push rod 211, a transmission frame 212, and two second eccentric mounting plates 213. The base of the second electric push rod 211 is rotatably connected to the base frame 300, and the output end of the second electric push rod 211 is rotatably connected to the transmission frame 212. The transmission frame 212 is rotatably connected to the two second eccentric mounting plates 213, and the two second eccentric mounting plates 213 are correspondingly mounted on the bottom side of the two rotating brackets 220. The second electric push rod 211 can drive the transmission frame 212 to move back and forth. When the transmission frame 212 moves, it will drive the two second eccentric mounting plates 213 to move. Since the direction of the pushing force of the second electric push rod 211 is not on the same straight line as the connection between the second eccentric mounting plate 213 and the rotating bracket 220, when the second electric push rod 211 pushes the transmission frame 212 and the transmission frame 212 pushes the rotating bracket 220, an eccentric force is generated at the rotating connection between the transmission frame 212 and the second eccentric mounting plate 213, thereby driving the second eccentric mounting plate 213 to rotate about the rotating connection between the rotating bracket 220 and the base frame 300 as the axis, so that the second eccentric mounting plate 213 drives the rotating bracket 220 to rotate. When the second eccentric mounting plate 213 rotates, the position of its rotational connection with the transmission frame 212 also changes, causing the connection position between the transmission frame 212 and the first electric push rod 510 to also change. This process will cause the second electric push rod 211 to rotate together. Since the base of the second electric push rod 211 is rotatably connected to the base frame 300, when the second electric push rod 211 rotates, its base can always be connected to the base frame 300.

[0052] It is understood that, in some other embodiments, reference is made to... Figure 1The bed frame 100 also includes a toilet paper holder 150, which is installed on the front side of the bed frame 140. The toilet paper holder 150 is used to hold toilet paper for the masseuse to wipe during the essential oil massage.

[0053] It is understood that, in some other embodiments, reference is made to... Figures 6 to 8 The bed frame 100 also includes two hand pads 130, which are fitted together on the left and right sides of the backrest 110. The two hand pads 130 and the backrest 110 form a rectangular structure to make the bed frame 100 more regular in shape. The bottom of the hand pads 130 and the bottom of the backrest 110 are connected by a parallel four-bar bracket 131. One side of the parallel four-bar bracket 131 is fixedly connected to the bottom of the backrest 110, and the opposite side of the parallel four-bar bracket 131 is fixedly connected to the bottom of the hand pads 130. The other two sides of the parallel four-bar bracket 131 can move simultaneously. Furthermore, it also includes a gas spring 132 (… Figure 6 (Indicated by the dashed line) and the air spring handle 133, the air spring handle 133 is used to control the air spring 132 to be in a fixed or movable state. One end of the air spring 132 is rotatably connected to the lower end of the rotating shaft of the parallel four-bar support 131 located at the bottom of the back pad 110, and the other end of the air spring 132 is rotatably connected to the upper end of the rotating shaft of the parallel four-bar support 131 located at the bottom of the hand pad 130. After using the air spring handle 133 to release the fixed state of the air spring 132, the parallel four-bar support 131 can be rotated to move the hand pad 130 under the back pad 110, so that the masseur's elbow can be placed on the hand pad 130 to perform a massage on the head or shoulders of the person being massaged; when the hand pad 130 is moved to the desired position, the air spring handle 133 is used to restore the fixed state of the air spring 132 to fix the relative position of the hand pad 130.

[0054] It is understood that, in some other embodiments, reference is made to... Figures 6 to 8 It also includes a control box 600, which is electrically connected to the first electric push rod 510 and the second electric push rod 211 to operate the first electric push rod 510 and the second electric push rod 211.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric massage bed, characterized in that, include: Bed frame (100); A lifting mechanism (200) is connected to the lower side of the bed body (100), and the lifting mechanism (200) is used to raise or lower the bed body (100). A base frame (300) is connected to the lifting mechanism (200), and the base frame (300) is used to support the lifting mechanism (200). The moving mechanism (400) includes multiple telescopic components and multiple swivel casters (440), with the multiple swivel casters (440) correspondingly connected to the lower ends of the multiple telescopic components, and the upper ends of the multiple telescopic components connected to both ends of the base frame (300).

2. The electric massage bed according to claim 1, characterized in that, The telescopic assembly includes a first connecting cylinder (410), a second connecting cylinder (420), and a damping module (430). The first connecting cylinder (410) is connected to the base frame (300), the second connecting cylinder (420) is movably inserted inside the first connecting cylinder (410), the lower end of the second connecting cylinder (420) is connected to the universal caster (440), and the damping module (430) is disposed between the first connecting cylinder (410) and the second connecting cylinder (420).

3. An electric massage bed according to claim 2, characterized in that, The damping module (430) includes a damper (431) and a damping sleeve (432). The damper (431) is movably inserted into the damping sleeve (432). The damper (431) is connected to the top of the first connecting cylinder (410). The damping sleeve (432) is connected to the upper part of the second connecting cylinder (420).

4. An electric massage bed according to claim 3, characterized in that, The damping sleeve (432) is fixedly connected to the inner side of the upper part of the second connecting cylinder (420).

5. An electric massage bed according to claim 2, characterized in that, A connecting frame (450) is provided between the second connecting cylinders (420) of the plurality of telescopic components, and the connecting frame (450) is fixedly connected to the plurality of second connecting cylinders (420) respectively.

6. An electric massage bed according to claim 5, characterized in that, The moving mechanism (400) also includes a plurality of foot pedals (460), which are fixedly connected to the connecting frame (450).

7. An electric massage bed according to claim 1, characterized in that, It also includes an angle adjustment mechanism (500). The bed body (100) includes a back cushion (110) and a seat cushion (120). The back cushion (110) and the seat cushion (120) are hinged to each other at their adjacent ends. The angle adjustment mechanism (500) connects the back cushion (110) and the seat cushion (120) respectively. The angle adjustment mechanism (500) is used to adjust the angle of the back cushion (110) relative to the seat cushion (120).

8. An electric massage bed according to claim 7, characterized in that, The angle adjustment mechanism (500) includes a first electric push rod (510) and a first eccentric mounting plate (520). The base of the first electric push rod (510) is rotatably connected to the seat cushion (120), and the output end of the first electric push rod (510) is rotatably connected to the first eccentric mounting plate (520). The first eccentric mounting plate (520) is fixedly installed on the back cushion (110) at one end near the seat cushion (120).

9. An electric massage bed according to claim 1, characterized in that, The bed body (100) includes a bed frame (140), and the lifting mechanism (200) includes a lifting drive module (210) and two rotating brackets (220). The bottom ends of the two rotating brackets (220) are rotatably connected to the base frame (300), and the top ends of the two rotating brackets (220) are rotatably connected to the bed frame (140). The lifting drive module (210) is connected to the two rotating brackets (220), and the lifting drive module (210) is used to drive the rotating brackets (220) to rotate to change the height difference between their two ends.

10. An electric massage bed according to claim 9, characterized in that, The lifting drive module (210) includes a second electric push rod (211), a transmission frame (212), and two second eccentric mounting plates (213). The base of the second electric push rod (211) is rotatably connected to the base frame (300), and the output end of the second electric push rod (211) is rotatably connected to the transmission frame (212). The transmission frame (212) is rotatably connected to the two second eccentric mounting plates (213), and the two second eccentric mounting plates (213) are correspondingly mounted on the bottom side of the two rotating brackets (220).

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