Anti-static bearing assembly and elliptical machine

Abstract

This invention discloses an anti-static bearing assembly and an elliptical machine, including a bearing housing, a bearing mechanism, and a conductive component. One side of the bearing housing has a receiving slot for mounting the bearing mechanism. The bearing mechanism includes an inner bearing ring and an outer bearing ring. The inner bearing ring is fixedly connected to a conductive fixed shaft, and the outer bearing ring is fixedly connected to the bearing housing. The outer circumference of the bearing housing is used for the fixed mounting of a handrail. The bearing housing has a guide hole communicating with the receiving slot, and a placement groove is formed on the outer circumference of the bearing housing. The first end of the conductive component is inserted into the guide hole and makes conductive contact with the bearing mechanism. The second end of the conductive component is placed in the placement groove and at least partially protrudes from the outer circumference of the bearing housing. This allows the second end to make conductive contact with the handrail when the bearing housing and handrail are fitted together, enabling static electricity at the handrail to be sequentially transferred through the conductive component to the bearing mechanism and the fixed shaft, ultimately achieving static grounding and ensuring a good user experience.

Description

Technical Field

[0001] This invention relates to the field of elliptical machine technology, and more specifically to an antistatic bearing assembly and an elliptical machine. Background Technology

[0002] Existing elliptical trainers have a fixed axis on the main frame. Two handrails are rotatably mounted on both sides of the fixed axis via bearing assemblies. The bearing assembly includes a bearing housing and a bearing mechanism, with the bearing mechanism running through both sides of the fixed axis. The bearing housing is fitted over the bearing mechanism, and the handrails are fixedly fitted over the bearing housing. Since the main frame is connected to a plug, it is the main part of the elliptical trainer's conductive system and can conduct most of the static electricity to ground. However, some static electricity also exists on the handrails. Because the bearing housing is made of plastic, the static electricity on the handrails cannot be transferred to the bearing mechanism through the bearing housing when the user uses the elliptical trainer, and therefore cannot be transferred to the fixed axis and the main frame to achieve grounding. This affects the user experience, so the conductive system is still not perfect and poses certain safety hazards. Summary of the Invention

[0003] The present invention aims to provide an antistatic bearing assembly to solve the aforementioned technical problems.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: an antistatic bearing assembly, comprising a bearing housing, a bearing mechanism, and a conductive element. A receiving slot is provided on one side of the bearing housing. The bearing mechanism is installed within the receiving slot. The bearing mechanism includes a bearing inner ring and a bearing outer ring coaxially arranged and rotating relative to each other. The bearing inner ring is fixedly connected to a conductive fixed shaft. The bearing outer ring is fixedly connected to the bearing housing. The bearing housing has its outer circumferential side used for the fixed mounting of a handrail arm. A guide hole communicating with the receiving slot is provided on the bearing housing. A placement groove is provided on the outer circumferential side of the bearing housing. A first end of the conductive element is inserted into the guide hole and makes conductive contact with the bearing mechanism. A second end of the conductive element is placed in the placement groove and at least partially protrudes from the outer circumferential side of the bearing housing, so that when the bearing housing and the handrail arm are fixedly mounted, the second end can make conductive contact with the handrail arm.

[0005] The conductive component includes an upright portion and a first extension portion and a second extension portion located at both ends of the upright portion and extending toward the same side. The first extension portion and the second extension portion form the first end and the second end. The first extension portion is inserted into the guide hole and its first end is in conductive contact with the outer ring of the bearing mechanism. The second extension portion is placed on the placement groove to make its second end in conductive contact with the armrest swing arm. The bearing mechanism is conductive as a whole, that is, the inner ring of the bearing and the outer ring of the bearing are electrically connected.

[0006] The first extension includes a transverse section and an inclined contact section located on the side of the transverse section away from the vertical section. The first end is the end of the inclined contact section away from the transverse section, and the first end makes conductive contact with the outer circumferential sidewall of the bearing outer ring of the bearing mechanism. The second extension includes a placement section and a bent contact section located on the side of the placement section away from the vertical section. The second end is the end of the bent contact section away from the placement section. The placement section is located in the placement groove, and the bent contact section protrudes out of the placement groove to make the second end make conductive contact with the handrail arm.

[0007] The bearing housing is made of plastic or rubber. The side of the bearing housing away from the receiving slot is the inner side of the bearing housing. The conductive component is U-shaped and is installed on the inner side of the bearing housing with its opening facing outward.

[0008] The bearing housing includes an annular end cap and an annular protrusion connected thereto. The annular protrusion has a receiving slot in the middle. The annular protrusion has multiple radially arranged protrusions on its outer periphery. The upper surface of the protrusions forms the outer circumferential side of the bearing housing. The placement slot is located on the upper surface of one of the protrusions.

[0009] The present invention also provides an elliptical machine, comprising any of the above-described antistatic bearing assemblies, a handrail swing arm, and a conductively grounded fixed shaft. The handrail swing arm is rotatably mounted on the fixed shaft via the bearing assemblies, and the handrail swing arm and the fixed shaft are electrically connected via the antistatic bearing assemblies.

[0010] The handrail swing arm and the fixed shaft are both metal conductors. There are two handrail swing arms, which are rotatably installed on both sides of the fixed shaft through bearing assemblies. The handrail swing arm includes a handrail, a sleeve and a swing arm connected in sequence. Two opposing bearing assemblies are installed on both sides of the fixed shaft. The sleeve is fixedly sleeved on the outside of the two opposing bearing assemblies on the same side of the fixed shaft.

[0011] This includes an elliptical trainer body and pivotally connected foot pedal connecting rods and links. The elliptical trainer body is equipped with a conductive and grounded main frame column. A fixed shaft is set on the main frame column and is conductively connected to it. A damping turntable is installed inside the elliptical trainer body. A base is installed below the elliptical trainer body. A guide rail is installed on the base corresponding to the rear side of the elliptical trainer body. The front end of the link is rotatably connected to the damping turntable. A pulley is installed at the rear end of the link, and the pulley slides and engages with the guide rail. The front end of the foot pedal connecting rod is pivotally connected to the bottom end of the swing arm. A foot pedal is installed at the rear end of the foot pedal connecting rod.

[0012] The device also includes a screw-lock assembly, a buffer pad, and a hollow spherical ball bearing. A ring-shaped component is fixedly installed at the bottom of the swing arm, and the spherical ball bearing is rotatably disposed within the ring-shaped component. A fixed bracket is provided above the front end of the foot pedal connecting rod. The fixed bracket includes a lug with a through hole for the screw-lock assembly to pass through and engage. The spherical ball bearing is locked onto the fixed bracket by the screw-lock assembly, and the buffer pad is located between the spherical ball bearing and the lug.

[0013] Among them, the annular component, the fixed bracket, and the spherical ball are metal conductors, and there is a conductive contact between the annular component and the spherical ball. The buffer pad is a plastic insulating component and also includes a conductive seat, which is installed on one side of the lug and makes conductive contact with the spherical ball, thereby realizing the conductive connection between the fixed bracket and the annular component.

[0014] The present invention has the following beneficial effects:

[0015] (1) By adding conductive components to the bearing seat, the static electricity at the handrail swing arm can be sequentially transferred to the bearing mechanism and the fixed shaft through the conductive components, and finally achieve static grounding. This prevents the static electricity at the handrail swing arm from being unable to be grounded and thus affecting the user experience. At the same time, it makes the conductive system of the elliptical machine more complete and improves safety and reliability.

[0016] (2) The bearing housing is made of plastic or rubber. Compared with metal bearing housing, it has higher installation accuracy, is easier to control, has less installation difficulty, and lower processing cost. In addition, the combination design of plastic or rubber bearing housing with conductive parts cleverly solves the installation and cost problems of metal bearing housing, while also achieving the function of conducting electricity.

[0017] (3) The conductive component includes an upright portion, a first extension portion, and a second extension portion. The first extension portion and the second extension portion form a first end and a second end. The first extension portion is inserted into the guide hole and its first end makes conductive contact with the outer ring of the bearing mechanism. The second extension portion is placed on the placement groove so that its second end makes conductive contact with the handrail arm. The ingenuity of this design lies in the fact that the handrail arm, bearing seat, and bearing outer ring are relatively stationary in the assembly relationship, and there will be no relative rotation. This makes the assembly of the conductive component more stable, avoids wear after a certain period of use, ensures the reliability of conductivity and service life, and at the same time, the shorter length saves materials and reduces costs. Attached Figure Description

[0018] Figure 1 An external view of the bearing assembly according to an embodiment of the present invention;

[0019] Figure 2 An inner view of the bearing assembly according to an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the bearing housing according to an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the bearing mechanism according to an embodiment of the present invention;

[0022] Figure 5 A schematic diagram of the structure of the conductive element in an embodiment of the present invention;

[0023] Figure 6 A perspective view of an elliptical machine according to an embodiment of the present invention;

[0024] Figure 7 A front view of the elliptical machine according to an embodiment of the present invention;

[0025] Figure 8 A schematic diagram of the assembly between the fixed shaft, bearing assembly, and handrail arm according to an embodiment of the present invention;

[0026] Figure 9 This is a diagram showing the transmission path of static electricity between the sleeve, bearing assembly, and fixed shaft of the handrail swing arm;

[0027] Figure 10 A schematic diagram of the assembly between the handrail swing arm and the foot pedal connecting rod according to an embodiment of the present invention;

[0028] Figure 11 A disassembly diagram of the armrest swing arm and foot pedal connecting rod according to an embodiment of the present invention;

[0029] Figure 12 A schematic diagram of the structure of the conductive base according to an embodiment of the present invention;

[0030] Figure 13 A cross-sectional view of the pivotal assembly between the handrail swing arm and the foot pedal connecting rod in an embodiment of the present invention.

[0031] Figure labels: 1 Elliptical machine body, 2 Damping turntable, 3 Main column frame, 4 Fixed axis, 5 Handrail and swing arm, 51 Handrail, 52 Sleeve, 53 Swing arm, 6 Bearing seat, 61 Receiving slot, 62 Guide hole, 63 Placement slot, 64 Annular protrusion, 65 Annular end cap, 66 Protrusion, 7 Bearing mechanism, 71 Inner bearing ring, 72 Outer bearing ring, 8 Conductive component, 81 Vertical part, 82 First extension, 821 Lateral section, 822 Inclined contact Section, 83 Second Extension, 831 Placement Section, 832 Bending Contact Section, 9 Screw, 10 Protective Cover, 11 Foot Pedal Connecting Rod, 12 Connecting Rod, 13 Base, 14 Guide Rail, 15 Pulley, 16 Foot Pedal, 17 Screw Lock, 18 Nut, 19 Buffer Pad, 20 Spherical Ball, 21 Ring Part, 22 Fixed Bracket, 221 Lug, 222 Through Hole, 223 Insertion Hole, 23 Conductive Seat, 231 Conductive Insert, 24 Protective Cover. Detailed Implementation

[0032] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0033] See Figure 1-5 As shown in the figure, as an embodiment of the present invention, an antistatic bearing assembly is provided, including a bearing housing 6, a bearing mechanism 7, and a conductive element 8. A receiving slot 61 is provided on one side of the bearing housing 6, and the bearing mechanism 7 is installed in the receiving slot 61. The bearing mechanism 7 includes a bearing inner ring 71 and a bearing outer ring 72 that are coaxially arranged and rotate relative to each other. In the prior art, the bearing mechanism 7 is typically a metal bearing. The bearing inner ring 71 and the bearing outer ring 72 are electrically connected by rollers or balls, meaning the entire bearing mechanism 7 is conductive. The bearing inner ring 71 is fixedly connected to a conductive fixed shaft 4, and the bearing outer ring 72 is fixed to the bearing housing 6. The bearing housing 6 is connected to the bearing mechanism 7, with its outer circumference used for the fixed mounting of the handrail arm 5. To ensure assembly accuracy and reduce processing costs, the bearing housing 6 is made of plastic or rubber. The bearing housing 6 has a guide hole 62 communicating with the receiving slot 61, and a placement groove 63 is formed on its outer circumference. The first end of the conductive element 8 is inserted into the guide hole 62 and makes conductive contact with the bearing mechanism 7. The second end of the conductive element 8 is placed in the placement groove 63 and at least partially protrudes from the outer circumference of the bearing housing 6, so that when the bearing housing 6 and the handrail arm 5 are fixedly mounted, the second end can make conductive contact with the handrail arm 5. This bearing assembly can be specifically applied to an elliptical machine, allowing static electricity at the handrail arm 5 to be sequentially transferred to the bearing mechanism 7 and the fixed shaft 4 via the conductive element 8, ultimately achieving static grounding. This prevents static electricity at the handrail arm 5 from failing to be grounded and affecting the user experience, while also improving the conductive system of the elliptical machine and enhancing safety and reliability.

[0034] Of course, in other cases, the bearing housing 6 can also be made of metal, but this requires high installation precision, is difficult to control, has high installation difficulty, and high processing costs. Therefore, the combination of a plastic bearing housing 6 and a conductive component 8 cleverly solves the defects of a metal bearing housing 6 while achieving conductivity. Furthermore, even if the bearing housing 6 is made of an expensive and conductive material, its conductivity reliability will decrease due to wear during use. Therefore, adding the conductive component 8 is also necessary to further improve conductivity reliability.

[0035] In this embodiment, the conductive component 8 includes an upright portion 81 and a first extension portion 82 and a second extension portion 83 located at both ends of the upright portion 81 and extending toward the same side. The first extension portion 82 and the second extension portion 83 form a first end and a second end. The first extension portion 82 is inserted into the guide hole 62 and its first end is in conductive contact with the outer ring 72 of the bearing mechanism 7. The second extension portion 83 is placed on the placement groove 63 to make its second end in conductive contact with the handrail arm 5. Specifically, the first extension 82 includes a transverse section 821 and an inclined contact section 822 located on the side of the transverse section 821 away from the vertical section 81. The first end of the inclined contact section 822 is the end away from the transverse section, and the first end makes conductive contact with the outer circumferential sidewall of the bearing outer ring 72 of the bearing mechanism 7. The ingenuity of this design lies in the fact that the armrest lever 5, bearing seat 6, and bearing outer ring 72 are in a relatively static assembly relationship, and there will be no relative rotation, making the assembly of the conductive component 8 more stable, avoiding wear after a certain period of use, ensuring conductive reliability and service life. At the same time, the shorter length saves materials and reduces costs. In addition, the inclined contact section 822 is clamped between the outer circumferential sidewall of the bearing outer ring 72 and the annular sidewall of the receiving slot 61, further improving the assembly stability at the position of the first extension 82.

[0036] The second extension 83 includes a placement section 831 and a bent contact section 832 located on the side of the placement section 831 away from the upright section 81. The second end is the end of the bent contact section 832 away from the placement section 831. The placement section 831 is located within the placement groove 63, and the bent contact section 832 protrudes from the placement groove 63 to make the second end electrically contact the handrail arm 5. This arrangement ensures the stability of the second extension 83 installed in the placement groove 63, thereby ensuring conductive stability. Of course, the second extension 83 can also be a separate placement section 831, installed within the placement groove 63, and also protruding from the placement groove 63 to make conductive contact with the handrail arm 5. In other words, the first extension 82 and the second extension 83 can be bent or tilted according to the actual assembly situation to ensure the best conductive effect.

[0037] In other embodiments, the bearing mechanism may not be conductive as a whole. For example, when the outer ring of the bearing is a ceramic outer ring and the inner ring is a metal inner ring, the first end of the conductive component can be in direct conductive contact with the inner ring of the metal inner ring, thereby transferring static electricity to the fixed shaft and finally achieving static grounding. However, since the armrest swing arm, bearing seat, and outer ring of the bearing are in a relative rotating assembly relationship with the inner ring of the bearing, if the first end is in conductive contact with the inner ring of the bearing, it is easy to cause poor assembly stability of the conductive component, wear during long-term use, reduced conductivity reliability and service life, and longer length and higher cost.

[0038] In this embodiment, the side of the bearing seat 6 away from the receiving slot 61 is the inner side of the bearing seat 6. The conductive component is a metal conductive component, which is more universal and economical. The conductive component is U-shaped and is installed on the inner side of the bearing seat 6 with the opening facing outward, ensuring the airtightness, reliability, stability and aesthetics of the assembly between the outer side of the bearing seat 6 and the handrail arm 5.

[0039] In this embodiment, the bearing housing 6 includes an annular end cap 65 and an annular protrusion 64 connected thereto. The annular protrusion 64 has a receiving slot 61 in the middle of its outer side. The annular protrusion 64 has a plurality of radially arranged protrusions 66 on its outer periphery. The upper surface of the protrusions 66 forms the outer circumference of the bearing housing 6. The placement groove is located on the upper surface of one of the protrusions 66. This design reduces the overall weight of the bearing housing 6 and facilitates gripping and orientation identification for assembly. The annular end cap 65 and the annular protrusion 64 are respectively distributed on the outer and inner sides of the bearing housing 6, making the assembly more reasonable and aesthetically pleasing.

[0040] See Figure 6-13 As shown, the present invention also provides an elliptical machine, including the anti-static bearing assembly, handrail swing arm 5, and a conductively grounded fixed shaft 4 described in the above embodiments. Both the handrail swing arm 5 and the fixed shaft 4 are metallic conductors. The handrail swing arm 5 is rotatably mounted on the fixed shaft 4 via the bearing assembly, and the handrail swing arm 5 and the fixed shaft 4 are electrically connected through the bearing assembly. Specifically, there are two handrail swing arms 5, rotatably mounted on both sides of the fixed shaft 4 via the bearing assembly. The handrail swing arm 5 includes a handrail 51, a sleeve 52, and a swing arm 53 connected in sequence. Two opposing bearing assemblies are installed on both sides of the fixed shaft 4. The sleeve 52 is fixedly sleeved on the outside of the two opposing bearing assemblies on the same side of the fixed shaft 4. That is, the annular end caps 65 of the two bearing seats 6 are respectively sealed and installed on the two side ports of the sleeve 52. Finally, a protective cover 10 is installed on the outside of the sleeve 52 by screws 9 and locking it to the fixed shaft 4, thereby providing protection and enhancing aesthetics. Figure 9 As shown, the dashed line represents the path of static electricity transmission, and the arrow indicates the direction of transmission. Static electricity at the handrail arm 5 can be transmitted sequentially through the sleeve 52, the conductive component 8, the outer ring of the bearing 72, the inner ring of the bearing 71, and finally to the fixed shaft 4, achieving static grounding. This ensures the user experience and makes the elliptical machine's conductive system more complete, improving safety and reliability.

[0041] In this embodiment, the elliptical machine body 1 and the foot pedal connecting rod 11 and the connecting rod 12 pivotally connected to each other are also included. The elliptical machine body 1 is provided with a conductive and grounded main column frame 3. The fixed shaft 4 is provided on the main column frame 3 and is conductively connected to it. The elliptical machine body 1 is provided with a damping turntable 2. A base 13 is installed below the elliptical machine body 1. A guide rail 14 is provided on the base 13 corresponding to the rear side of the elliptical machine body 1. The front end of the connecting rod 12 is rotatably connected to the damping turntable 2. A pulley 15 is provided at the rear end of the connecting rod 12. The pulley 15 slides and cooperates with the guide rail 14. The front end of the foot pedal connecting rod 11 is pivotally connected to the bottom end of the swing arm 53. A foot pedal 16 is provided at the rear end of the foot pedal connecting rod 11. A data display screen and a fixed handle are provided on the top of the main column frame 3.

[0042] In this embodiment, the system also includes a screw-locking assembly, a buffer pad 19, and a hollow spherical ball bearing 20. A ring-shaped component 21 is fixedly installed at the bottom end of the swing arm 53. The spherical ball bearing 20 is rotatably disposed within the ring-shaped component 21. A fixed bracket 22 is provided above the front end of the foot pedal connecting rod 11. The fixed bracket 22 includes a lug 221 with a through hole 222 for the screw-locking assembly to pass through and engage. The spherical ball bearing 20 is locked onto the fixed bracket 22 by the screw-locking assembly. The buffer pad 19 is located between the spherical ball bearing 20 and the lug 221. The ring-shaped component 21, the fixed bracket 22, and the spherical ball bearing 20 are all conductive metals. The ring-shaped component 21 and the spherical ball bearing 20 are in conductive contact. The buffer pad 19 is a plastic insulator, thus providing a cushioning effect.

[0043] In this embodiment, to further improve the conductive system of the elliptical machine and transfer static electricity from the foot pedal connecting rod 11 to the handrail swing arm 5 for grounding, a conductive seat 23 is also included. This seat is installed on one side of the lug 221 and makes conductive contact with the spherical ball bearing 20, thereby achieving conductive connection between the fixed bracket 22 and the annular component 21. Specifically, the screw-lock assembly includes a bolt 17 and a nut 18 that cooperate with each other. The conductive seat 23 is installed between the bolt 17 and the outer wall of the lug 221. The conductive seat 23 extends inward to form a conductive insert 231. A socket 223 is provided on the lug 221, and the conductive insert 231 passes through the socket 223 and makes conductive contact with the spherical ball bearing 20. This arrangement allows static electricity at the foot pedal connecting rod 11 to be transferred through the conductive seat 23 to the spherical ball bearing 20, and then sequentially through the handrail swing arm 5, the bearing assembly, to the fixed shaft 4, and the main column frame 3, finally achieving static grounding. This further improves the user experience and enhances safety and reliability.

[0044] In this embodiment, the bearing mechanism 7 also includes a number of rolling elements installed between the inner ring 71 and the outer ring 72 of the bearing. Specifically, the rolling elements are balls or rollers to enable relative rotation and conductive connection between the inner ring 71 and the outer ring 72 of the bearing.

[0045] In this embodiment, the ring 21, bolt 17, nut 18, conductive seat 23, buffer pad 19, spherical ball bearing 20, and fixed bracket 22 form a pivot assembly. A protective cover 24 is installed at the bottom of the swing rod 53 corresponding to the periphery of the pivot assembly to shield and protect the pivot assembly, while also improving its aesthetics.

[0046] The process of using this invention:

[0047] The user holds the handrail 51 with both hands and steps on the two foot pedals 16, alternating between them. This causes the foot pedal connecting rod 11, connecting rod 12, and handrail swing arm 5 to work together, which in turn rotates the damping turntable 2, thus achieving the purpose of fitness. The operation is convenient and simple. The static electricity generated by the user's hands can be transmitted sequentially through the handrail swing arm 5, conductive component 8, bearing mechanism 7, and fixed shaft 4 to the main column frame 3, and finally grounded. The static electricity generated by the user's feet can be transmitted sequentially through the foot pedal connecting rod 11, conductive seat 23, spherical ball bearing 20, and ring component 21 to the handrail swing arm 5, and finally grounded through the bearing assembly to the main column frame 3, ensuring the user's experience and improving safety and reliability.

[0048] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail made to the invention without departing from the spirit and scope of the invention as defined in the appended claims fall within the protection scope of the invention.

Claims

1. An antistatic bearing assembly, characterized in that: The device includes a bearing housing, a bearing mechanism, and a conductive component. A receiving slot is provided on one side of the bearing housing. The bearing mechanism is installed within the receiving slot. The bearing mechanism includes an inner bearing ring and an outer bearing ring that are coaxially arranged and rotate relative to each other. The inner bearing ring is fixedly connected to a conductive fixed shaft, and the outer bearing ring is fixedly connected to the bearing housing. The bearing housing has an outer circumferential side for the fixed installation of a handrail arm. A guide hole communicating with the receiving slot is provided on the bearing housing. A placement groove is provided on the outer circumferential side of the bearing housing. The first end of the conductive component is inserted into the guide hole and makes conductive contact with the bearing mechanism. The second end of the conductive component is placed in the placement groove and at least partially protrudes from the outer circumferential side of the bearing housing, so that the second end can make conductive contact with the handrail arm when the bearing housing and the handrail arm are fixedly fitted together.

2. The antistatic bearing assembly according to claim 1, characterized in that: The conductive component includes an upright portion and a first extension portion and a second extension portion located at both ends of the upright portion and extending toward the same side. The first extension portion and the second extension portion form the first end and the second end. The first extension portion is inserted into a guide hole and its first end is in conductive contact with the outer ring of the bearing mechanism. The second extension portion is placed on a placement groove to make its second end in conductive contact with the armrest swing arm. The bearing mechanism is conductive as a whole, that is, the inner ring of the bearing and the outer ring of the bearing are electrically connected.

3. The antistatic bearing assembly according to claim 2, characterized in that: The first extension includes a transverse section and an inclined contact section located on the side of the transverse section away from the vertical section. The first end is the end of the inclined contact section away from the transverse section. The first end makes conductive contact with the outer circumferential sidewall of the bearing outer ring of the bearing mechanism. The second extension includes a placement section and a bent contact section located on the side of the placement section away from the vertical section. The second end is the end of the bent contact section away from the placement section. The placement section is located in the placement groove, and the bent contact section protrudes out of the placement groove to make the second end make conductive contact with the handrail arm.

4. The antistatic bearing assembly according to claim 2, characterized in that: The bearing housing is made of plastic or rubber. The side of the bearing housing away from the receiving slot is the inner side of the bearing housing. The conductive component is U-shaped and is installed on the inner side of the bearing housing with its opening facing outward.

5. The antistatic bearing assembly according to claim 1, characterized in that: The bearing housing includes an annular end cap and an annular protrusion connected thereto. The annular protrusion has the receiving slot in the middle. The annular protrusion has a plurality of radially arranged protrusions on its outer periphery. The upper surface of the protrusions forms the outer circumferential side of the bearing housing. The placement slot is located on the upper surface of one of the protrusions.

6. An elliptical machine, characterized in that: The device includes an antistatic bearing assembly as described in any one of claims 1-5, a handrail arm, and a conductively grounded fixed shaft. The handrail arm is rotatably mounted on the fixed shaft via the bearing assembly, and the handrail arm and the fixed shaft are electrically connected via the antistatic bearing assembly.

7. The elliptical machine according to claim 6, characterized in that: Both the handrail swing arm and the fixed shaft are metal conductors; there are two handrail swing arms, which are rotatably installed on both sides of the fixed shaft through bearing assemblies. The handrail swing arm includes a handrail, a sleeve and a swing arm connected in sequence. Two opposing bearing assemblies are installed on both sides of the fixed shaft. The sleeve is fixedly sleeved on the outside of the two opposing bearing assemblies on the same side of the fixed shaft.

8. The elliptical machine according to claim 7, characterized in that: It also includes the elliptical trainer body and the foot pedal connecting rod and the connecting rod that are pivotally connected to each other. The elliptical trainer body is equipped with a conductive and grounded main column frame. The fixed shaft is set on the main column frame and is conductively connected to it. The elliptical trainer body is equipped with a damping turntable. A base is installed under the elliptical trainer body. A guide rail is set on the base corresponding to the rear side of the elliptical trainer body. The front end of the connecting rod is rotatably connected to the damping turntable. The rear end of the connecting rod is equipped with a pulley. The pulley slides and cooperates with the guide rail. The front end of the foot pedal connecting rod is pivotally connected to the bottom end of the swing arm. A foot pedal is set at the rear end of the foot pedal connecting rod.

9. The elliptical machine according to claim 8, characterized in that: It also includes a screw-lock assembly, a buffer pad, and a hollow spherical ball. A ring-shaped component is fixedly installed at the bottom of the swing arm, and the spherical ball is rotatably disposed within the ring-shaped component. A fixed bracket is provided above the front end of the foot pedal connecting rod. The fixed bracket includes a lug, and a through hole is provided on the lug for the screw-lock assembly to pass through and engage. The spherical ball is locked onto the fixed bracket by the screw-lock assembly, and the buffer pad is located between the spherical ball and the lug.

10. The elliptical machine according to claim 9, characterized in that: The annular component, the fixed bracket, and the spherical ball are all metal conductors, and there is a conductive contact between the annular component and the spherical ball. The buffer pad is a plastic insulating component. It also includes a conductive seat, which is installed on one side of the lug and makes conductive contact with the spherical ball, thereby realizing the conductive connection between the fixed bracket and the annular component.

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