CN110559606A

CN110559606A - Running machine

Info

Publication number: CN110559606A
Application number: CN201910913186.2A
Authority: CN
Inventors: 贾俊峰; 白先丙; 彭星伟; 景志峰
Original assignee: University of Science and Technology Beijing USTB
Current assignee: Beijing Kingsmith Technology Co Ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2019-12-13
Anticipated expiration: 2039-09-25
Also published as: CN110559606B

Abstract

the utility model relates to a running machine, which comprises a front running board assembly, a rear running board assembly, an annular running belt, a rotary driving mechanism, a running belt adjusting mechanism and a handrail upright post, wherein the front running board assembly comprises a front running frame, a front roller and a front running board which are both arranged on the front running frame; the rear running plate assembly comprises a rear running frame, a rear roller and a rear running plate, and the rear roller and the rear running plate are both arranged on the rear running frame; the rear running board assembly is connected with the front running board assembly through a hinge assembly and can rotate towards the lower side of the front running board assembly along the retracting direction so that the running board assembly is folded; the rotary driving mechanism drives the rear running plate assembly to rotate; the running belt adjusting mechanism drives the rear roller to move longitudinally to loosen or tension the annular running belt, and the handrail upright post is hinged at the front end of the front running board assembly and can rotate relative to the front running board assembly and keep a relative position. Through the technical scheme, the treadmill can be automatically folded and unfolded so as to be conveniently stored and used.

Description

Running machine

Technical Field

the disclosure relates to the technical field of fitness equipment, in particular to a running machine.

background

along with the continuous improvement of living standard of people, also attach importance to the physical training increasingly, more and more people buy the treadmill and place in the family to do exercises at ordinary times.

Because the treadmill needs certain space of putting, and the house space in the city is general less, consequently, the running board folding design of treadmill can be convenient for fold the running board under the condition of not using to reduce occupation space.

In the related art, the folding treadmill is manually folded, and the rear running board assembly is lifted upwards, and needs to be manually unfolded when being unfolded, so that the use is very inconvenient.

Disclosure of Invention

An object of the present disclosure is to provide a treadmill that can be automatically folded and unfolded to be conveniently stored and used.

in order to accomplish the above object, the present disclosure provides a running board assembly including: the front running board assembly comprises a front running frame, a front roller and a front running board, wherein the front roller is rotatably arranged on the front running frame, and the front running board is fixed on the front running frame; the rear running plate assembly comprises a rear running frame, a rear roller and a rear running plate, the rear roller is rotatably arranged on the rear running frame, and the rear running plate is fixed on the rear running frame; wherein the rear end of the front running board is hinged to the front end of the rear running board by a hinge assembly arranged to allow the rear running board assembly to rotate in a stow direction towards the underside of the front running board assembly to collapse the running board assembly; an endless running belt wound around the front and rear rollers and capable of being driven with rotation of the front and rear rollers; the rotary driving mechanism is used for driving the rear running board assembly to rotate along the retracting direction or the unfolding direction opposite to the retracting direction; a running belt adjusting mechanism for driving the rear roller to move along the longitudinal direction of the treadmill so as to loosen or tension the endless running belt; the armrest upright post is hinged to the front end of the front running board assembly, and the armrest upright post and the front running board assembly can rotate relatively and keep relative positions; the control module is used for receiving a spreading signal, a retracting signal, a loosening signal and a tensioning signal, sending a spreading command according to the spreading signal, sending a retracting command according to the retracting signal, sending a loosening command according to the loosening signal and sending a tensioning command according to the tensioning signal, the spreading command is used for driving the rear running plate assembly to rotate along the spreading direction until an included angle between the front running plate and the rear running plate is a first preset angle, the retracting command is used for driving the rear running plate assembly to rotate along the retracting direction until an included angle between the front running plate and the rear running plate is a second preset angle, and the loosening command is used for driving the rear roller to move forwards for a first preset distance by the running belt adjusting mechanism, the tensioning command is used for driving the rear roller to move backwards by a second preset distance through the belt running adjusting mechanism; the rear roller triggers the retraction signal to be sent when moving forward by the first preset distance, and the tensioning signal is triggered to be sent when the included angle between the front running plate and the rear running plate is the first preset angle.

through above-mentioned technical scheme, promptly the treadmill that this disclosure provided, when using, the contained angle between preceding running board assembly and the back running board assembly is 180, run the board assembly promptly and inject flat running platform, after the user finishes using, run the downside rotation of board assembly before running the board assembly through the rotary driving mechanism drive back and so that the running board assembly is folding, this kind of folding mode is different with traditional folding mode, at this folding in-process, the running board assembly upwards arches in the butt joint department of preceding running board assembly and back running board assembly, along with the rotation of back running board assembly, the degree of arch-up is bigger, the contained angle between the front and back running board is littleer, here, can make through the design before, when contained angle between back running board and the handrail stand is the minimum, whole treadmill still can "stand" steadily. And when the user used next time, through rotary driving mechanism's drive, preceding, back race board assembly and handrail stand simultaneous reverse motion to make the treadmill expand, at the in-process that expands, the contained angle between the board assembly grow gradually around, contained angle between handrail stand and the preceding board assembly grow gradually, and the degree of "hunch up" then reduces gradually, race the board assembly and prescribe a limit to flat running platform around till. Before folding, the annular running belt is loosened through the running belt adjusting mechanism, so that the phenomenon that the annular running belt is loosened due to stretching is avoided; and when the front running plate and the rear running plate are unfolded, namely after the front running plate and the rear running plate are laid flat, the annular running belt is tensioned through the running belt adjusting mechanism so as to be normally used by a user. In the folding and unfolding processes of the running board assembly, the rear end of the rear running board assembly is always supported on the ground by the upward arching type folding mode, and the armrest upright post always keeps a relative position, so that the rear running board assembly cannot fall off due to the sliding of hands of a user or accidental hand loosening and the like, and the rear running board assembly is more convenient and safer to operate. Also, the upwardly arched folding allows the weight of the rear deck assembly not to be entirely pressed against the hinge assembly during folding and unfolding of the deck assembly and the armrest uprights, which greatly reduces the load on the hinge assembly, and from a design point of view, reduces the rigidity requirements of the hinge assembly, thereby allowing the hinge assembly to be constructed in a variety of lightweight ways. And, in the treadmill that this disclosure provided, through control module, can realize running the automatic folding so that accomodate of board assembly to save occupation space, also can realize running the automatic expansion of board assembly so that use simultaneously, in order to simplify the use operation, improve and optimize user experience.

additional features and advantages of the disclosure will be set forth in the detailed description which follows.

drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic view of a treadmill provided in accordance with one embodiment of the present disclosure in a deployed state;

FIG. 2 is a schematic view of a treadmill provided in accordance with one embodiment of the present disclosure at a certain folding angle during folding;

FIG. 3 is a schematic view of a treadmill provided in accordance with one embodiment of the present disclosure after folding is complete;

FIG. 4 is a schematic view of a treadmill provided in accordance with one embodiment of the present disclosure in a deployed state (with handrail posts removed);

FIG. 5 is a schematic top view of a treadmill provided in accordance with one embodiment of the present disclosure in a deployed state (with handrail posts removed);

FIG. 6 is a schematic perspective view of a treadmill provided in accordance with one embodiment of the present disclosure at a certain folding angle during folding (with handrail posts removed);

FIG. 7 is an enlarged view of portion A of FIG. 6;

fig. 8 is an enlarged view of portion B of fig. 6;

fig. 9 is an enlarged view of portion C of fig. 6;

FIG. 10 is a schematic perspective view of another angle of the treadmill provided in FIG. 6;

FIG. 11 is a partial view from perspective D of FIG. 10;

FIG. 12 is a schematic view of a treadmill in a deployed state (with portions of the rear running rack and the front running rack removed) according to another embodiment of the present disclosure;

fig. 13 is an enlarged view of portion E of fig. 12;

fig. 14 is an enlarged view of portion F of fig. 12;

fig. 15 is an enlarged view of portion H of fig. 12;

FIG. 16 is a schematic view of the treadmill with front and rear running frames added on the base of FIG. 15;

FIG. 17 is a schematic illustration of a deployed state of a deck assembly of a treadmill provided in accordance with an embodiment of the present disclosure;

FIG. 18 is a schematic view of a deck assembly of a treadmill provided in accordance with an embodiment of the present disclosure at a folded angle during folding;

Fig. 19 is a schematic view of a folded state of a deck assembly of a treadmill provided in accordance with an embodiment of the present disclosure.

description of the reference numerals

1-front running board assembly, 11-front running rack, 110-front running rack connecting piece, 12-front longitudinal pipe, 13-front connecting pipe, 130-front long hole, 14-front roller and 15-front running board; 101-front roller, 102-rear roller, 103-unfolding supporting foot mat, and 104-real-time supporting foot mat; 2-rear running board assembly: 21-rear running frame, 210-rear running frame connecting piece, 211-fixing support, 22-rear longitudinal pipe, 23-rear connecting pipe, 230-rear long hole, 24-rear roller, 241-first end, 242-second end and 25-rear running plate; 31-annular running belt, 32-handrail upright post, 33-connecting rod, 331-first pin shaft, 332-second pin shaft; 4A-a first adjusting mechanism, 41-a motor, 42-a screw rod, 43-a threaded sleeve, 44-a roller connecting piece, 45-a guide bracket, 46-a support limiting groove, 47-a motor bracket and 4B-a second adjusting mechanism; 50-control module, 51-first position sensor, 52-second position sensor; 61-articulated shaft, 62-shaft sleeve; 70-pivot, 71-front hinge body, 72-first front hinge axis, 73-first rear hinge axis, 74-rear hinge body, 75-second front hinge axis, 76-second rear hinge axis; 81-flexible running plate, 82-elastic expansion piece, 83-bolt; 9-rotation driving mechanism, 91-speed reducing motor, 92-motor push rod.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise stated, the use of the directional words such as "up" and "down" is defined based on the use state of the running board assembly, and when the running board assembly is unfolded and laid flat on the floor, the side facing the floor is "down" and the side away from the floor is "up"; the front and the back are defined by taking the transmission direction of the running belt as a reference, and the upper part of the running belt (namely the part stepped by the foot of a user) is transmitted from front to back; in addition, "left and right" refer to the left-hand orientation and right-hand orientation corresponding to the user facing forward; the "length direction" or "longitudinal direction" corresponds to the "front" and "rear" directions, and the "width direction" or "transverse direction" corresponds to the "left" and "right" directions. Furthermore, the terms "first," "second," and the like, as used herein are intended to distinguish one element from another, and are not necessarily sequential or significant. Furthermore, in the following description, when referring to the figures, the same reference numbers in different figures denote the same or similar elements, unless otherwise explained. The foregoing definitions are provided to illustrate and describe the present disclosure only and should not be construed to limit the present disclosure.

The present disclosure provides a running machine, referring to fig. 1 to 6, and fig. 10 and 12, the running machine includes a running board assembly, an endless running belt 31, a rotation driving mechanism 9, and a running belt adjusting mechanism, the running board assembly includes a front running board assembly 1, a rear running board assembly 2, the front running board assembly 1 includes a front running frame 11, a front roller 14, and a front running board 15, the front roller 14 is rotatably mounted at a front end of the front running frame 11, the front running board 15 is fixed to the front running frame 11; the rear running board assembly 2 comprises a rear running frame 21, a rear roller 24 and a rear running board 25, wherein the rear roller 24 is rotatably arranged at the rear end of the rear running frame 21, and the rear running board 25 is fixed on the rear running frame 21; wherein the rear end of the front running frame 11 is hinged to the front end of the rear running frame 21 by a hinge assembly arranged to allow the rear running board assembly 2 to be rotated in a stowing direction towards the underside of the front running board assembly 1 to collapse the running board assembly; an endless running belt 31 is wound around the front roller 14 and the rear roller 24 and can be driven with the rotation of the front roller 14 and the rear roller 24; the rotary driving mechanism 9 is used for driving the rear running board assembly 2 to rotate along the retracting direction or the unfolding direction opposite to the retracting direction; a running belt adjusting mechanism for driving the rear roller 24 to move in the longitudinal direction of the treadmill to slacken or tighten the endless running belt 31.

through above-mentioned technical scheme, promptly the treadmill that this disclosure provided, when using, the contained angle between preceding running board assembly 1 and the back running board assembly 2 is 180, run the board assembly promptly and inject flat running platform, after the user finishes using, run the board assembly 2 through the downside rotation of rotary driving mechanism 9 drive back running board assembly 1 towards preceding running board assembly 1 so that the running board assembly is folding, this kind of folding mode is different with traditional folding mode, in this folding process, the running board assembly upwards arches in the butt joint department of preceding running board assembly 1 and back running board assembly 2, along with the rotation of back running board assembly 2, the degree of arch is big more, the contained angle between the running board is little around, here, can make through the design when the contained angle is minimum between the running board around, whole treadmill still can "stand" steadily. When the user uses the treadmill next time, the front running board assembly, the rear running board assembly and the handrail upright post 32 move reversely at the same time by the driving of the rotary driving mechanism 9, so that the treadmill is unfolded, in the unfolding process, the included angle between the front running board assembly and the rear running board assembly is gradually increased, and the arching degree is gradually reduced until the front running board assembly and the rear running board assembly define a flat running platform. Before folding, the annular running belt 31 is loosened through the running belt adjusting mechanism, so that the annular running belt 31 is prevented from being loosened due to stretching; and when the running board is unfolded, namely after the front running board and the rear running board are laid flat, the annular running belt 31 is tensioned through the running belt adjusting mechanism for normal use of a user. In the folding and unfolding processes of the running board assembly, the rear end of the rear running board assembly 2 is always supported on the ground by the upward arching type folding mode, so that the situation that the hands of a user slip or are accidentally loosened and the like cannot fall off, and the running board assembly is more convenient and safer to operate. Also, the upwardly arched folding allows the weight of the rear deck assembly 2 not to be entirely pressed on the hinge assembly during the folding and unfolding of the deck assembly, which greatly reduces the load on the hinge assembly, and from a design point of view, the rigidity requirements of the hinge assembly can be reduced, thereby making it possible to construct the hinge assembly in a variety of light and handy ways. In conclusion, the running board assembly in the treadmill that this disclosure provided can fold automatically so that accomodate to save occupation space, also can expand automatically so that use simultaneously, in order to simplify the use operation, improve and optimize user experience.

wherein the hinge connection between the handrail upright 32 and the front running board assembly 1 can be configured as follows: when the deck assembly is folded in a manner that the middle portion is upwardly arched, the handle post 32 is relatively rotated about the first hinge axis 331 between itself and the front deck assembly 1, and is finally folded together with the deck assembly. Therefore, the occupied placing space can be further reduced. Hereinafter, this will be described in detail in connection with the hinge assembly.

wherein, the unfolding state refers to when the running board assembly is laid on the floor. The folded state is when the included angle between the lower side surface of the front running board assembly 1 and the lower side surface of the rear running board assembly 2 is minimum. The retracting direction refers to a direction in which the rear deck assembly 2 is rotated about the hinge assembly toward the lower side of the front deck assembly 1 in the unfolded state; the unfolding direction refers to a direction in which the rear running board assembly 2 is rotated about the hinge assembly toward a lower side away from the front running board assembly 1 in the folded state; the retracting direction and the unfolding direction are opposite. The distance between the front drum 14 and the rear drum 24 refers to the distance between the rotational axis of the front drum 14 and the rotational axis of the rear drum 24, and the distance is the longest in the unfolded state and the shortest in the folded state.

specifically, as shown in fig. 3 and 4, a front roller 101 may be provided at a front end of the front running frame 11, a rear roller 102 may be provided at a rear end of the rear running frame 21, and the front running frame 11 and the armrest upright 32 are hinged to the first hinge pin 331, a plurality of unfolding support pads 103 (shown in fig. 4) may be further provided at lower sides of the front running frame 11 and the rear running frame 21, respectively, to provide a stable support force when unfolded for use, and a real-time support pad 104 (shown in fig. 4) may be further provided near the front roller 101. In the unfolded use state, the front roller 101 is suspended, namely, the front roller 101 is not in contact with the ground, and the four unfolded support foot pads 103, the real-time support foot pad 104 and the rear roller 102 are in contact with the ground, so that the influence of the contact of the front roller and the rear roller on the stability in use is avoided; when the running board is folded, the rear roller 102 contacts with the ground all the time and rolls towards the front running board assembly 1 on the floor, so that the rear running board assembly 2 rotates around the hinge assembly towards the lower side of the front running board assembly 1, friction force is generated between the real-time supporting foot pad 104 and the floor, supporting force is provided for the running board assembly, the rear roller 102 can roll smoothly, when the included angle between the front running board 15 and the floor reaches a set value, for example, 80 degrees, the front roller 101 touches the ground, and at the moment, the front roller and the rear roller contact with the ground simultaneously, so that the folded running machine is convenient to move. The lower surface of the real time support footbed 104 that contacts the floor may be formed in an arc shape to provide stable contact with the floor during the stowing or deployment.

in order to realize automation, according to an embodiment of the present disclosure, referring to fig. 5 to 16, the treadmill further includes a control module 50, the rotation driving mechanism 9 and the running belt adjusting mechanism are communicatively connected to the control module 50, the control module 50 is configured to receive the unfolding signal, the folding signal, the loosening signal and the tensioning signal, send an unfolding command according to the unfolding signal, send a folding command according to the folding signal, send a loosening command according to the loosening signal, send a tensioning command according to the tensioning signal, the unfolding command is used for the rotation driving mechanism 9 to drive the rear running board assembly 2 to rotate along the unfolding direction until the included angle between the front running board 15 and the rear running board 25 is a first preset angle, the folding command is used for the rotation driving mechanism 9 to drive the rear running board assembly 2 to rotate along the folding direction until the included angle between the front running board 15 and the rear running board 25 is a second preset angle, the loosening command is used for driving the rear roller 24 to move forwards by a first preset distance by the belt running adjusting mechanism, and the tensioning command is used for driving the rear roller 24 to move backwards by a second preset distance by the belt running adjusting mechanism; wherein, the back roller 24 triggers the emission of the retracting signal when moving forward for a first preset distance, and the emission of the tensioning signal when the included angle between the front running plate 15 and the back running plate 25 is a first preset angle.

when a user needs to fold the running board assembly in the unfolded state, a loosening signal is given, the control module 50 receives the loosening signal and then sends a loosening command to enable the rear roller 24 to move forward for a first preset distance, so as to loosen the annular running belt 31, at this time, the rear roller 24 moves to a preset position, here, a rear roller position detection device for detecting the position of the rear roller 24 can be arranged, when the rear roller 24 reaches the preset position, the rear roller position detection device can be triggered to send a rear roller position signal, the rear roller position signal can be used as a retraction signal, the control module 50 receives the signal and then sends a retraction command, the rotary driving mechanism drives the rear running board assembly 2 to rotate along the retraction direction to enable the included angle between the front running board 15 and the rear running board 25 to be a second preset angle, here, a proximity switch can be arranged to terminate the continuous rotation of the rear running board assembly 2, thereby completing the folding of the running board assembly. Therefore, in the treadmill that this disclosure provided, through control module, can realize running the automatic folding so that accomodate of board assembly to save occupation space, also can realize running the automatic expansion of board assembly so that use simultaneously, in order to simplify the use operation, improve and optimize user experience.

Here, the "relaxing signal" may be a "stow" signal given by the remote control or the control panel of the treadmill, i.e., a "stow" key may be provided on the remote control or the control panel, the function of which is to fold the running board assembly. The relaxation signal may also be a voice "retract" signal received by the AI voice control module, or the like. In this regard, the present disclosure is not particularly limited. The first predetermined distance is set based on a change in the distance between the front roller 14 and the rear roller 24 when the treadmill is changed from the unfolded state to the folded state. The second preset angle is set according to the included angle between the front running board 15 and the rear running board 25 when the treadmill is changed from the unfolded state to the folded state, and the second preset angle corresponding to the folded state is the minimum.

when a user wants to use the running board assembly in a folded state to unfold by using the running machine, an unfolding signal is given, the control module 50 receives the unfolding signal and then sends an unfolding command, so that the rear running board assembly 2 rotates along the unfolding direction to enable the included angle between the front running board 15 and the rear running board 25 to be a first preset angle, the running board assembly is unfolded, here, an angle detecting device for detecting an included angle between the front running board assembly 1 and the rear running board assembly 2 may be provided, when the angle detection device detects that the included angle between the front running board assembly and the rear running board assembly is a first preset angle, an angle in-place signal is sent out, the angle in-place signal can be used as a tensioning signal, and the control module 50 sends a tensioning command after receiving the signal, so that the rear roller 24 moves backwards by a second preset distance, and the tensioning of the annular running belt 31 is completed, so that the running board assembly can be normally used. Here, the "unfolding signal" may be a "start" signal given by a remote controller or a control panel of the treadmill, that is, an "unfolding" key may be provided on the remote controller or the control panel, and the "unfolding" key functions to unfold the running board assembly, or to unfold the running board assembly and turn on the treadmill.

The second predetermined distance is set based on the change in distance between the front roller 14 and the rear roller 24 as the treadmill changes from the folded condition to the unfolded condition. The first preset angle is set according to the included angle between the front running board 15 and the rear running board 25 when the treadmill is changed from the folded state to the unfolded state, and the first preset angle corresponding to the unfolded state is the largest.

For convenience of setting, the first preset distance and the second preset distance may be equal, and of course, the first preset distance and the second preset distance may be set according to actual requirements or may not be equal.

in the specific embodiments provided by the present disclosure, the adjustment mechanism may be configured in any suitable manner. According to some embodiments of the present disclosure, referring to fig. 5 to 16, the rear roller 24 has a first end 241 and a second end 242 opposite to each other in a transverse direction, the adjusting mechanism includes a first adjusting mechanism 4A and a second adjusting mechanism 4B, the first adjusting mechanism 4A is disposed at the first end 241 of the rear roller 24, the first end 241 is driven to move in a longitudinal direction and lock a position of the first end 241, the second adjusting mechanism 4B is disposed at the second end 242 of the rear roller 24, the second end 242 is driven to move in the longitudinal direction and lock a position of the second end 242, a slack command is used for the first adjusting mechanism 4A to drive the first end 241 to move forward a first preset distance, and a slack command is used for the second adjusting mechanism 4B to drive the second end 242 to move forward a first preset distance, a tension command is used for the first adjusting mechanism 4A to drive the first end 241 to move backward a second preset distance, and the tension command is used by the second adjustment mechanism 4B to drive the second end 242 a second predetermined distance rearward. Wherein, under the tensioning command or the loosening command, the first end 241 and the second end 242 can synchronously move backwards or forwards for the same distance, and the probability of the deviation of the endless running belt 31 can be reduced. The first preset distance and the second preset distance required by the endless track belt 31 of different foldable track board assemblies can be different, and are not limited in detail herein. In addition, the first adjusting mechanism 4A and the second adjusting mechanism 4B can respectively and individually adjust the first end 241 and the second end 242 to adjust the rear roller 24 to be parallel to the front roller 14, so as to correct the deviation problem of the endless running belt 31. In addition, the slack command and the tension command may include two commands, that is, one slack command and one tension command may both drive the first adjustment mechanism 4A and the second adjustment mechanism 4B simultaneously, or one slack command and one tension command may only drive one of the first adjustment mechanism 4A and the second adjustment mechanism 4B, and thus, the first end 241 and the second end 242 of the rear roller 24 may move synchronously or asynchronously, without limitation.

in addition, the control module 50 may also issue other loosening commands or tightening commands according to other signals to deal with different loosening or tightening requirements, for example, when a new endless running belt 31 needs to be replaced, the distance between the front roller 14 and the rear roller 24 needs to be adjusted, which may be greater than the first preset distance or the second preset distance, and for example, the endless running belt 31 may loosen after a long time use, and at this time, the distance between the front roller 14 and the rear roller 24 needs to be adjusted to tighten the endless running belt, which may be less than the first preset distance or the second preset distance, for example, it may be moved by 1mm to accurately adjust the tightness of the endless running belt 31, thereby improving the comfort of use. These are easily implemented by those skilled in the art and will not be described herein.

according to some embodiments of the present disclosure, the treadmill further includes a running belt position detecting module disposed adjacent to the rear roller 24 and configured to detect a position of a portion of the endless running belt 31 adjacent to the rear roller 24 in a lateral direction and to emit a running belt position signal including a first belt deviation signal, a belt positive signal, and a second belt deviation signal; the control module 50 is in communication connection with the running belt position detection module, the control module 50 is configured to receive a running belt position signal and correspondingly send a first deviation correction command, an alignment command, and a second deviation correction command according to the first deviation signal, the belt correction signal, and the second deviation signal, the first deviation correction command is used for the first adjustment mechanism 4A to drive the first end 241 to move, the second deviation correction command is used for the second adjustment mechanism 4B to drive the second end 242 to move, so as to adjust the rear roller 24 to be parallel to the front roller 14, and the alignment command is used for the first adjustment mechanism 4A to lock the position of the first end 241 and the second adjustment mechanism 4B to lock the position of the second end 242. Specifically, according to the motion property of the endless running belt 31, if the front roller 14 and the rear roller 24 are parallel, the distance between the two lateral ends of the front roller 14 and the two lateral ends of the corresponding rear roller 24 are equal, the extending direction of the endless running belt 31 is perpendicular to the axes of the front and rear rollers, at this time, the running belt position signal that the running belt position detection module can detect is a belt positive signal, otherwise, if the front roller 14 and the rear roller 24 are not parallel, the distance between the two lateral ends of the front roller 14 and the two lateral ends of the corresponding rear roller 24 is not equal, and the endless running belt 31 will be shifted to the side where the smaller or shorter end is located, that is, to the first side or the second side. At this time, the running belt position signal detected by the running belt position detection module is the first belt deviation signal or the second belt deviation signal. By moving the corresponding end of the rear roller 24, the longitudinal position of the corresponding end of the rear roller 24 in the transverse direction can be adjusted to make the front roller 14 and the rear roller 24 parallel, i.e. the endless running belt 31 can be restored to the preset normal position.

In the specific embodiment provided by the present disclosure, after the running belt position signal detected by the running belt position detecting module itself is transmitted to the control module 50, the control module 50 may determine whether the running belt position signal detected by the running belt position detecting module is specifically the first belt deviation signal, the belt positive signal or the second belt deviation signal. Alternatively, the actually detected running belt position signal may be compared by a table look-up manner, for example, if the running belt position represented by the actually detected running belt position signal falls within the range corresponding to the first belt deviation signal in the table, it is determined that the actually detected running belt position signal is the first belt deviation signal. Of course, in other embodiments provided by the present disclosure, the determination may be made in other ways, and the present disclosure is not particularly limited thereto.

Since the specific deviation amount of the endless running belt 31 cannot be determined, the deviation rectifying command issued by the control module 50 may be set to be constant for each moving distance of the corresponding end of the running belt adjusting mechanism driving the rear roller 24, and for convenience of description, it may be defined as a unit distance, in an embodiment provided by the present disclosure, the unit distance corresponding to the first deviation rectifying command is equal to the unit distance corresponding to the second deviation rectifying command, that is, the first deviation rectifying command may be used for the first adjusting mechanism 4A driving the first end 241 to move by one unit distance, and the second deviation rectifying command may be used for the second adjusting mechanism 4B driving the second end 242 to move by one unit distance. The unit distance may be set to 1mm, that is, only the first end 241 or the second end 242 can be moved longitudinally by 1mm each time of the deviation rectifying command, or may be other dimensions, for example, 0.5mm, 1.5mm, and the like, and the setting of the unit distance may be determined according to the specific dimension and the actual manufacturing precision of the running board assembly, and is not limited herein. In other embodiments, it may be provided that: the first end 241 and the second end 242 move longitudinally different distances with each deviation correction command, for example, the first end 241 is 0.5mm and the second end 242 is 1 mm. After finishing the primary deviation rectifying command, the running belt position detection module will detect again to judge whether the annular running belt 31 returns to the normal position, if so, a belt positive signal can be sent out, and the first end 241 and the second end 242 are correspondingly locked through the first adjusting mechanism 4A and the second adjusting mechanism 4B respectively to prevent the first end 241 and the second end 242 from moving unnecessarily; if not, the belt deviation signal is continuously sent out, so that the first end 241 or the second end 242 is longitudinally moved, and the process is repeated until the annular running belt 31 returns to the normal position.

In the embodiment provided by the present disclosure, the running belt position signal may represent an absolute value of the running belt position or a relative value of the running belt position, for example, the absolute value may be a position coordinate of a point on the endless running belt 31 near the rear roller 24, and the relative value may be a distance between a point on the endless running belt 31 near the rear roller 24 and a longitudinal pipe of the running frame. According to some embodiments of the present disclosure, as shown in fig. 5 to 16, the running belt position detecting module may include a first position sensor 51 and a second position sensor 52, the first position sensor 51 and the second position sensor 52 are disposed at a predetermined interval from each other in a lateral direction, and the first position sensor 51 is located inside the second position sensor 52, the endless running belt 31 is located at a normal position to shield only the first position sensor 51, and when both the first position sensor 51 and the second position sensor 52 are shielded by the endless running belt 31, the running belt position detecting module issues a first deviation signal, at which time, a first deviation command is used for the first adjusting mechanism 4A to drive the first end 241 to move backward by a unit distance; when the first position sensor 51 is shielded by the annular running belt 31 and the second position sensor 52 is exposed to the annular running belt 31, the running belt position detection module sends out a belt positive signal; when the first position sensor 51 and the second position sensor 52 are exposed to the endless running belt 31, the running belt position detecting module sends a second belt deviation signal, and at this time, a second deviation rectifying command is used for the second adjusting mechanism 4B to drive the second end 242 to move backward by one unit distance.

Alternatively, the first position sensor 51 and the second position sensor 52 may be both located below the endless tread belt 31, or may be located between an upper layer and a lower layer of the endless tread belt 31, or one of the first position sensor 51 and the second position sensor 52 may be located below the endless tread belt 31 and the other may be located between the upper layer and the lower layer of the endless tread belt 31. When the endless tread belt 31 deviates, the first position sensor 51 and the second position sensor 52 are either completely shielded (i.e., not visible when viewed from above) or the first position sensor 51 and the second position sensor 52 are completely exposed (i.e., visible when viewed from above). For example, as shown in fig. 2, the first position sensor 51 and the second position sensor 52 may be disposed on a first side (which may be considered as a right side) of the endless tread belt 31, and the first position sensor 51 is disposed inside the second position sensor 52, it should be explained herein that when the position sensor is disposed on the right side of the endless tread belt 31, the corresponding direction of the direction word "inner" is "left", and vice versa "right". Here, the first end 241 of the rear roller 24 is located on the first side of the endless running belt 31, and then the preset distance between the first position sensor 51 and the second position sensor 52 defines the range of the normal position of the endless running belt 31, that is, when the edge of the first side of the endless running belt 31 is located between the first position sensor 51 and the second position sensor 52, the endless running belt 31 is in the normal position, and at this time, the first position sensor 51 is shielded by the endless running belt 31, and the second position sensor 52 is exposed, and the running belt position detection module is triggered to send out a belt positive signal; if the first side edge of the annular running belt 31 is not within the preset distance, the position of the annular running belt 31 deviates, and correspondingly, when the first position sensor 51 and the second position sensor 52 are blocked, the annular running belt 31 deviates to the first side, the running belt position detection module is triggered to send a first belt deviation signal for one time, and the corresponding control module 50 sends a first deviation correction command for one time, so that the first end 241 moves backwards by one unit distance until the annular running belt 31 returns to the right; when the first position sensor 51 and the second position sensor 52 are both exposed, the endless running belt 31 is deflected to the second side, the running belt position detection module is triggered to send a second belt deflection signal once, and the control module 50 sends a first deviation correction command once to enable the first end 241 to move backwards by a unit distance until the endless running belt 31 returns to the right.

of course, the first position sensor 51 and the second position sensor 52 may be disposed on different sides of the endless tread belt 31, i.e., the first position sensor 51 is disposed on a first side of the endless tread belt 31 and the second position sensor 52 is disposed on a second side of the endless tread belt 31.

According to other embodiments of the present disclosure, the position detection module may include a plurality of position detection units, which may be arrayed in rows and columns, e.g., a rectangular array, a radioactive array, or the like. All the position detecting units may be located below the endless running belt 31, or may be located between the upper layer and the lower layer of the endless running belt 31, or a part of the position detecting units may be located below the endless running belt 31 and another part of the position detecting units may be located between the upper layer and the lower layer of the endless running belt 31.

it can be set that: the annular running belt 31 only shields the first group of position detection units when located at a normal position, shields at least the second group of position detection units when located at a first belt deviation position, and shields at least the third group of position detection units when located at a second belt deviation position, wherein the number of the position detection units in the first group of position detection units, the second group of position detection units and the third group of position detection units and the position of each position detection unit are determined, and the number and/or the position of the position detection units respectively included in the first group of position detection units, the second group of position detection units and the third group of position detection units are different from each other. For convenience of understanding, all the position detection units may be considered as a large set, each position detection unit is one of the elements, and since one position unit corresponds to one specific position, any two elements may be considered to be different. Accordingly, the above-mentioned "only block the first group of position detecting units", "at least the second group of position detecting units", and "at least the third group of position detecting units" correspond to three different subsets, and may be defined as a first subset, a second subset, and a third subset.

in this case, the elements included in the three subsets may be set according to actual design, and are not particularly limited herein. Of course, it may also be designed that the elements included in one or more subsets can be adjusted or changed through some program settings during the actual use process, so as to better meet the actual application requirements.

when the annular running belt 31 only shields the first group of position detection units, triggering the running belt position detection module to send out a belt positive signal; when the annular running belt 31 covers at least a second group of position detection units, triggering the running belt position detection module to send out a first belt deviation signal once, and sending out a first deviation correction command once by the control module 50 to enable the first end 241 to move backwards by a unit distance until the annular running belt 31 returns to the right; when the circular running belt 31 blocks at least the third group of position detecting units, the running belt position detecting module is triggered to send out a second belt deviation signal once, and the control module 50 sends out a first deviation rectifying command once to enable the first end 241 to move backwards by a unit distance until the circular running belt 31 returns to the right.

For example, it may be that when the endless tread belt 31 only blocks the first group of position detecting units, both the second group of position detecting units and the third group of position detecting units are exposed, which can be understood by referring to fig. 5 correspondingly, that is, the second group of position detecting units are located at the first side of the endless tread belt 31, and the third group of position detecting units are located at the second side of the endless tread belt 31. That is, it is to be understood that there is no intersection between any two of the first subset, the second subset, and the third subset.

For example, it is also possible that when the endless tread belt 31 only shields the first group of position detection units, the second group of position detection units is exposed, while the third group of position detection units is also shielded, which can still be understood with reference to fig. 5, i.e. the second group of position detection units is located on the first side of the endless tread belt 31, while the third group of position detection units is included in the first group of position detection units, which can be understood as that the third group of position detection units is a subset of the first subset. In this case, it should be noted that, if the above-mentioned "the endless running belt 31 at least shields the third group of position detecting units", there is a case that the endless running belt 31 shields other position detecting units besides the third group of position detecting units, and all the shielded position detecting units just constitute the first group of position detecting units, then, it is triggered that the running belt position detecting module sends out the belt positive signal instead of the second belt bias signal.

Illustratively, it is also possible that, when the endless tread belt 31 only blocks the first group of position detecting units, the third group of position detecting units is exposed, while the second group of position detecting units is also blocked, as can still be understood with reference to fig. 5, i.e. the third group of position detecting units is located on a second side of the endless tread belt 31 (opposite to the first side, the side corresponding to the left hand of the user in the use case, corresponds to the lower side of the drawing plane in fig. 5), while the second group of position detecting units is included in the first group of position detecting units, which can be understood as that the second group of position detecting units is a subset of the first subset. In this case, it should be noted that, if the above-mentioned "the endless running belt 31 at least shields the second group of position detecting units", there is a case that the endless running belt 31 shields other position detecting units besides the second group of position detecting units, and all the shielded position detecting units just constitute the first group of position detecting units, then, it is triggered that the running belt position detecting module sends out a belt positive signal instead of the first belt bias signal.

Here, the "exposure" and "blocking" are both viewed from a top view.

wherein the first end 241 or the second end 242 is moved backward, the endless running belt 31 can be tensioned while being corrected to increase the friction force between the endless running belt and the front roller 14 and the rear roller 24, thereby reducing the probability of re-deviation. In other embodiments, the first deviation rectifying command and the second deviation rectifying command may have two modes, that is, the first deviation rectifying command may have two modes of moving the first end 241 forward or backward, and the second deviation rectifying command may have two modes of moving the second end 242 forward or backward, so as to more accurately adjust the deviation of the endless running belt 31, and simultaneously avoid the endless running belt 31 from being over-tensioned, and the specific moving distance may be set according to actual needs, which is easy to be implemented by those skilled in the art, and will not be described herein again. The position sensor may be a travel switch, an infrared proximity sensor, or the like, and is not limited thereto.

Alternatively, referring to fig. 5, the front roller 14 is mounted on the front running frame 11, the rear roller 24 is mounted on the rear running frame 21, a fixing bracket 211 may be provided on the running frame, one end of the fixing bracket 211 is fixed to the running frame and the other end extends to below the endless running belt 31, the first position sensor 51 and the second position sensor 52 are fixed to the fixing bracket 211, or the position detecting unit may be fixed to the fixing bracket 211. Specifically, the fixing bracket 211 may be constructed in a plate-shaped structure and detachably coupled to a position of the running frame near the rear drum 24, and the first and second position sensors 51 and 52 may be detachably mounted to the fixing bracket 211, and the position in the lateral direction may be adjusted to reset the normal position range of the endless running belt 31 as needed in use. The first and second position sensors 51 and 52 are located below the endless tread belt 31 so as to detect the position of the endless tread belt 31 in the lateral direction. Alternatively, the first position sensor 51 and the second position sensor 52 may be disposed on different fixing brackets 211. Similarly, the position detection unit may be fixed to different fixing brackets 211, that is, the relationship between the position detection unit and the fixing bracket 211 may be one-to-one or many-to-one.

Here, it should be clear that the endless tread belt 31 is divided into upper and lower portions by a plane on which the pivot axes of the front and rear rollers 14 and 24 are located, and in order to facilitate the installation of the fixing bracket 21, the fixing bracket 211 is not extended between the upper and lower portions of the endless tread belt 31 but is extended below the entire endless tread belt 31, that is, the first and second position sensors 51 and 52 directly detect the lateral position of the lower portion of the endless tread belt 31.

according to some embodiments of the present disclosure, referring to fig. 6 and 9, the first adjustment mechanism 4A includes a motor 41, a screw transmission structure and a drum link 44, the motor 41 is fixed to the rear running frame 21, the drum link 44 is fixed to the drum shaft of the rear drum 24, the screw transmission structure includes a screw rod 42 and a threaded sleeve 43 which are engaged with each other, the screw rod 42 is fixed to the output shaft of the motor 41 to rotate with the output shaft about a rotation axis extending in the longitudinal direction, and the threaded sleeve 43 is fixed to the drum link 44. That is, the axis of the screw 42 extends along the longitudinal direction and rotates around the axis thereof under the driving of the motor 41, the screw sleeve 43 is in threaded connection with the screw 42, and the rotational motion of the screw 42 can be converted into the linear motion of the screw sleeve 43 in the longitudinal direction, so that the rear roller 24 is driven by the roller connecting piece 44 and the roller shaft of the rear roller 24 to move linearly in the longitudinal direction, thereby realizing the tensioning, loosening or deviation correction of the endless running belt 31. Specifically, the motor 41 may be disposed on the inner side surface of the rear longitudinal pipe 22 on the first side of the rear running frame 21, and the output shaft of the motor 41 may extend along the longitudinal direction, in the longitudinal direction, the output shaft of the motor 41, the screw rod 42, the threaded sleeve 43, and the roller connecting member 44 are sequentially connected, the output shaft of the motor 41 rotates to drive the roller connecting member 44 to move linearly, wherein the motor 41 may be disposed in front of the rear roller 24 to reasonably utilize the space and reduce the length of the running board assembly in the longitudinal direction. The motor 41 may be mounted to the motor bracket 47 by a flange, the motor bracket 47 may be mounted to the inner side of the rear race frame 21, and the motor bracket 47 may be provided with a guide groove to receive an output shaft of the motor 41. The first adjustment mechanism 4A may also be configured in any suitable manner to drive the first end 241 to move in the longitudinal direction, for example, it may be configured in a hydraulically driven manner, or it may be possible in a pneumatic manner, and the disclosure is not limited in particular thereto.

alternatively, the first adjustment mechanism 4A includes a guide bracket 45, the guide bracket 45 being fixed to the rear running frame 21, and being formed with a support-limiting groove 46, the support-limiting groove 46 receiving the drum link 44 and allowing only the drum link 44 to move in the longitudinal direction. Specifically, the guide bracket 45 may be installed on an inner side surface of the rear longitudinal pipe 22 at the first side of the rear running block 21, the drum link 44 moves in the support limiting groove 46 in the longitudinal direction, and the drum shaft of the rear drum 24 extends from an opening of the support limiting groove 46 to be connected to the drum link 44, so that the guide bracket 45 can both ensure the first end 241 to move linearly in the longitudinal direction and support the rear drum 24. Sliding friction can be formed between the roller connecting piece 44 and the supporting limiting groove 46, the contact surface between the roller connecting piece 44 and the supporting limiting groove 46 is increased, the speed of the roller connecting piece 44 which is abraded can be reduced, and anti-skid and shock-absorbing materials such as teflon and nylon can be added on the roller connecting piece 44 and the supporting limiting groove 46, so that the friction force between the roller connecting piece 44 and the supporting limiting groove is reduced, and the abrasion resistance coefficient of the roller connecting piece is enhanced. In other embodiments, a supporting surface and a limiting structure may be disposed in the supporting and limiting groove 46, and a roller may be disposed below the roller connector 44, and the roller connector 44 may roll on the supporting surface along the longitudinal direction under the guidance of the limiting structure, which will be easily understood by those skilled in the art and will not be described herein again.

According to one embodiment of the present disclosure, the first end 241 and the second end 242 of the rear roller 24 are disposed opposite to each other in the transverse direction, and the first adjusting mechanism 4A driving the first end 241 and the second adjusting mechanism 4B driving the second end 242 may be configured in the same manner, that is, the same structure, symmetrically distributed at the two transverse ends of the roller 24, so as to reduce the manufacturing difficulty of the running board assembly and improve the production efficiency.

In addition, for the same type of foldable treadmill, the change of the included angle between the front running board 15 and the rear running board 25 is the same during the unfolding process and the folding process, so that the first preset distance and the second preset distance can be made equal.

In the particular embodiments provided by the present disclosure, the rotary drive mechanism 9 may be configured in any suitable manner. For example, the rotary driving mechanism 9 may be configured as a hydraulic driving mechanism, one end of which is connected to the front running board assembly 1, and the other end of which is connected to the rear running board assembly 2, and the folding and unfolding of the running board assembly are realized along with the extension and contraction of the hydraulic piston rod. Alternatively, the rotation driving mechanism 9 may be drivingly connected to the hinge assembly. Under the driving action of the rotary driving mechanism 9, the hinge assembly drives the front running board assembly 1 to rotate, and then the folding or unfolding of the running board assembly is realized.

wherein the hinge assembly may be configured in any suitable manner.

according to some embodiments of the present disclosure (hereinafter, referred to as "first embodiment"), as shown in fig. 6 to 11, the hinge assembly includes a hinge shaft 61, the rotation driving mechanism 9 drives the hinge shaft 61 to rotate about its own axis, the hinge shaft 61 is inserted into the rear end of the front running frame 11 and the front end of the rear running frame 21, the rear end of the front running frame 11 and the hinge shaft 61 are relatively rotatable, and the relative rotation between the hinge shaft 61 and the front end of the rear running frame 21 is limited by a circumferential limit structure. That is, when the hinge shaft 61 rotates around its own axis, the rear end of the front running frame 11 does not rotate synchronously with the hinge shaft 61, and the relative position between the two changes along with the rotation of the hinge shaft 61, and the rear running frame 21 can rotate synchronously with the hinge shaft 61 through the circumferential limiting structure, so that the rear running frame 21 rotates around the hinge shaft 61 relative to the front running frame 11, and the rotation direction of the rear running frame 21 can be controlled by controlling the rotation direction of the hinge shaft 61.

In addition, the rear end of the front running frame 11 may be provided with a front running frame connecting member 110, and the front end of the rear running frame 21 may be provided with a rear running frame connecting member 210, as shown in fig. 6 and 7, the rear running frame connecting member 210 may be sleeved outside the front running frame connecting member 210 and hinged by a hinge shaft 61, and in the unfolded state, the rear running frame connecting member 210 is butted against the front running frame connecting member 110 in the longitudinal direction to restrict the rear running frame assembly 2 from continuing to rotate in the unfolded direction, thereby ensuring the stability of the running platform and improving the comfort of use.

In order to realize the rotation of the hinge shaft 61, when driving the rear running frame 21 to rotate synchronously, the hinge shaft 61 can rotate relative to the front running frame 11, according to some embodiments of the present disclosure, the hinge shaft 61 can have a special-shaped cross section, the circumferential limiting structure is a matching structure between the outer circumferential surface of the hinge shaft 61 and a special-shaped hole arranged at the front end of the rear running frame 21, the hinge assembly includes a shaft sleeve 62, the shaft sleeve 62 has a special-shaped shaft hole matched with the hinge shaft 61, and has a circular outer circumferential surface, so as to be rotatably matched in a mounting hole at the rear end of the front running frame 11. Here, the "irregular cross section" is a shape other than a circle, for example, an ellipse, a polygon, etc., so that the hinge shaft 61 is engaged with an irregular hole provided at the front end of the rear running frame 21 to form a circumferential limit structure, thereby enabling the hinge shaft 61 and the rear running frame 21 to rotate synchronously. And a bushing 62 having a circular outer circumferential surface is fitted over the hinge shaft 61 in a form-fitting manner so that the hinge shaft 61 rotates with respect to the front running frame 11. Wherein the hinge shaft 61 may first pass through the one side rear running frame coupler 210, then pass through the one side front running frame coupler 110, then pass through the other side front running frame coupler 110, and then pass through the other side rear running frame coupler 210, thereby connecting the front running frame 11 and the rear running frame 21. One end of the hinge shaft 61 is extended to be connected to the rotation driving mechanism 9. The front running block attachment 110 and the rear running block attachment 210 may be fixed to the front running block 11 and the rear running block 21, respectively, by screws.

alternatively, the irregular cross-section may be a hexagonal cross-section, that is, the hinge shaft 61 may be configured as a hexagonal rod, which is simple in structure and good in stability.

According to some embodiments of the present disclosure, referring to fig. 7, the rotation driving mechanism 9 may be fixed to the front running frame 11 and configured as a reduction motor 91, and the hinge shaft 61 is drivingly connected to an output shaft of the reduction motor 91. Specifically, since the hinge shaft 61 sequentially passes through the front running frame connecting member 110 and the rear running frame connecting member 210 to hinge them, the reduction motor 91 may be fixed to an outer side surface of the front running frame 11 in the lateral direction to facilitate the driving connection with the hinge shaft 61 if the front running frame connecting member 110 is located at the outer side of the rear running frame connecting member 210 in the lateral direction, and similarly, the reduction motor 91 may be fixed to an outer side surface of the rear running frame 21 in the lateral direction if the rear running frame connecting member 210 is located at the outer side of the front running frame connecting member 110. By arranging a limit switch in the reduction motor 91, the reduction motor 91 stops rotating under the action of the limit switch when rotating for a certain angle.

According to other embodiments of the present disclosure (hereinafter, referred to as "second embodiment"), referring to fig. 12 to 16, the hinge assembly includes a front hinge body 71, a rear hinge body 74, a rotation shaft 70, a first front hinge shaft 72, a first rear hinge shaft 73, a second front hinge shaft 75, and a second rear hinge shaft 76, a front end of the front hinge body 71 is extended into a rear end of the front running frame 11 and is hinged to a rear end of the front running frame 11 through the first front hinge shaft 72, the first front hinge shaft 72 is inserted into a front long hole 130 provided at a front end of the front running frame 11 and is movable along the front long hole 130, a rear end of the front hinge body 71 is extended into a front end of the rear running frame 21 and is hinged to a front end of the rear running frame 21 through the first rear hinge shaft 73, and the first rear hinge shaft 73 is inserted into a shaft hole provided at a front end of the rear running frame 21; the front end of the rear hinge body 74 extends into the rear end of the front running frame 11 and is hinged to the rear end of the front running frame 11 through a second front hinge shaft 75, the second front hinge shaft 75 is inserted into a shaft hole provided at the rear end of the front running frame 11, the rear end of the rear hinge body 74 extends into the front end of the rear running frame 21, and is hinged to the front end of the rear running frame 21 by means of a second rear hinge shaft 76, the second rear hinge shaft 76 is inserted into a rear long hole 230 provided at the front end of the rear running frame 21 and is movable along the rear long hole 230, the front long hole 130 and the rear long hole 230 both extend in the longitudinal direction, the first front hinge shaft 72 is located at the front side of the second front hinge shaft 75, the first rear hinge shaft 73 is located at the front side of the second rear hinge shaft 76, the rear end of the front hinge body 71 and the front end of the rear hinge body 74 are crossed and pivotally connected at the crossed position by the rotation shaft 70, and the rotation driving mechanism 9 drives the first front hinge shaft 72 to move in the front long hole 130 or drives the second rear hinge shaft 76 to move in the rear long hole 230. The front running frame 11 is provided with a link 33, a front end of the link 33 extends forwards from the front running frame 11 and is hinged to the handle upright 32 by a second pin 332, and a rear end of the link 33 extends backwards and is pivotally connected to the first front hinge shaft 72.

Since the distance between the first front hinge shaft 72 and the first rear hinge shaft 73 is fixed, and correspondingly, the distance between the second front hinge shaft 75 and the second rear hinge shaft 76 is fixed, when the front running frame 11 and the rear running frame 21 are in the unfolded state, that is, the rear end surface of the front running frame 11 and the front end surface of the rear running frame 21 are in contact, the first front hinge shaft 72 is located at the foremost end of the front long hole 130, and the second rear hinge shaft 76 is located at the rearmost end of the rear long hole 230, which are the farthest from each other in the longitudinal direction. When folding is required, under the drive of the rotary drive mechanism 9, the first front hinge shaft 72 moves in the front long hole 130 or the second rear hinge shaft 76 moves in the rear long hole 230, but in reality this movement is a relative movement which is achieved by the rotation of the rear running frame 21 about the rotation shaft 70 thereof hinged to the front running frame 11 in view of the fact that the rear end of the front hinge body 71 cannot move (can only rotate) in the shaft hole of the front running frame 11 and the rear end of the rear hinge body 72 cannot move (can only rotate) in the shaft hole of the rear running frame 21, whereby the first front hinge shaft 72 moves from the front extreme position to the rear extreme position in the front long hole 130 and the second rear hinge shaft 76 moves from the rear extreme position to the front extreme position in the rear long hole 230 during the downward rotation of the rear running board assembly 2 relative to the front running board assembly 1 based on the relative rotation of the rotation shaft 70 between the front hinge body 71 and the rear hinge body 74 being allowed, when the folding is completed, the first front hinge shaft 72 may be located at the rear limit position of the front long hole 130, and the second rear hinge shaft 76 may be located at the front limit position in the rear long hole 230, and thus, the rotation angle range of the rear deck assembly 2 may be defined by setting the length of the front long hole 130 and the length of the rear long hole 230.

wherein, along with the movement of the first front hinge shaft 72 in the front long hole 130, the connecting rod 33 can be driven to move forwards or backwards, and simultaneously, the front end and the rear end of the connecting rod 33 rotate around the second pin shaft 332 and the first front hinge shaft 72 respectively, thereby, the armrest upright post 32 rotates around the first pin shaft 331 between the armrest upright post and the front running frame 11 towards the front running frame 11 or away from the front running frame, so as to change the included angle between the armrest upright post and the front running frame 11, when folded, the occupied space can be reduced, and when unfolded, the armrest upright posture can be kept for the user to support. Wherein, during the backward movement of the connecting rod 33 relative to the front running frame 11 following the first front hinge shaft 72 in the front running frame 11, the connecting rod 33 provides a backward pulling force to the handle upright 32, and under the pulling force, the handle upright 32 rotates backward around the first pin 331 to be folded toward the front running frame 11, and at the same time, under the supporting action of the connecting rod 33, the position of the handle upright 32 relative to the front running frame 11 can be maintained. During the forward movement of the link 33 relative to the front running frame 11 following the first front hinge shaft 72 in the front running frame 11, the link 33 provides a forward pushing force to the armrest upright 32, and under the pushing force, the armrest upright 32 rotates forward around the first pin 331 to be unfolded away from the front running frame 11, and under the supporting action of the link 33, the position of the armrest upright 32 relative to the front running frame 11 can be maintained.

In addition, the first front hinge shaft 72 slides in the front long hole 130, and the second rear hinge shaft 76 slides in the rear long hole 230, so that a wear-resistant lubricating and shock-absorbing material, such as teflon, nylon, or the like, can be added to the friction contact portion thereof to improve wear resistance.

When the first front hinge shaft 72 is located at the front limit position in the front long hole 130 and the second rear hinge shaft 76 is located at the rear limit position in the rear long hole 230, the axis of the rotation shaft 70 is aligned with the seam between the rear end of the front running frame 11 and the front end of the rear running frame 21, which makes the movement of the hinge smoother.

Alternatively, as shown in fig. 15 to 16, the front hinge body 71 may be constructed in a C-shaped structure including a basic section and a front end bent downward from a front side of the basic section and a rear end bent downward from a rear side of the basic section, the rotation shaft 70 being inserted through a rear side of the basic section, the basic section extending parallel to the longitudinal direction when the first front hinge shaft 72 is located at a front-side limit position in the front long hole 130 and the second rear hinge shaft 76 is located at a rear-side limit position in the rear long hole 230. That is, in the unfolded state, the basic section of the front hinge body 71 is parallel to the front running frame 11, and when the first front hinge shaft 72 and the second rear hinge shaft 76 are relatively moved, the basic section of the front hinge body 71 abuts against the rear end of the front running frame 11, and the front running frame 11 can be guided to rotate.

Alternatively, as shown with reference to fig. 15 to 16, the rear hinge body 74 may be constructed in a C-shaped structure including a basic section and a front end bent downward from a front side of the basic section and a rear end bent downward from a rear side of the basic section, the rotation shaft 70 being inserted through the front side of the basic section, the basic section extending parallel to the longitudinal direction when the first front hinge shaft 72 is located at a front-side limit position in the front long hole 130 and the second rear hinge shaft 76 is located at a rear-side limit position in the rear long hole 230. That is, in the unfolded state, the basic section of the rear hinge body 74 is parallel to the rear running frame 21, and when the first front hinge shaft 72 and the second rear hinge shaft 76 are relatively moved, the basic section of the rear hinge body 74 abuts against the front end of the rear running frame 21, and the rear running frame 21 can be guided to rotate.

In addition, the front and rear hinge bodies 71, 74 may be present in pairs, and each hinge assembly may include multiple pairs. Of course, each hinge assembly may include a different number of front hinge bodies 71 and rear hinge bodies 74. Then a plurality of front hinge bodies 71 and a plurality of rear hinge bodies 74 may share the same rotating shaft 70, wherein a plurality of front hinge bodies 71 share the same first front hinge shaft 72 and the same first rear hinge shaft 73, and wherein a plurality of rear hinge bodies 74 share the same second front hinge shaft 75 and the same second rear hinge shaft 76, regardless of whether the number of front hinge bodies 71 and rear hinge bodies 74 in each set of hinge assemblies is equal or not. This simultaneous use of pairs of front hinge bodies 71 and rear hinge bodies 74 increases the strength of the connection at the hinge, increasing the reliability and stability of the connection.

according to some embodiments of the present disclosure, the rotation driving mechanism 9 is configured as a motor push rod 92, the motor push rod 92 is fixed in the rear running frame 21, and the motor push rod 92 is extended and contracted in the longitudinal direction, and the end of the motor push rod 92 is connected to the second rear hinge shaft 76. In addition, the motor push rod 92 is arranged in the running frame, so that the transverse size of the whole treadmill can be reduced.

According to some embodiments of the present disclosure, the front running frame 11 includes a front longitudinal pipe 12 and a front connection pipe 13 disposed at a rear end of the front longitudinal pipe 12, and the front long hole 130 is disposed at a side of the front connection pipe 13; the rear running frame 21 includes a rear vertical pipe 22 and a rear connection pipe 23 provided at the front end of the rear vertical pipe 22, and a rear long hole 230 is provided at the side of the rear connection pipe 23. Specifically, in the unfolded state, the front connection pipe 13 and the rear connection pipe 23 are aligned, wherein the front portion of the front hinge body 71 is received in the front connection pipe 13 and the rear portion is received in the rear connection pipe 23; the rear hinge body 74 has a front portion received in the front connection pipe 13 and a rear portion received in the rear connection pipe 23. In this way, the overall treadmill can be reduced in size in the lateral direction.

In the first embodiment, the rotary driving mechanism 9 drives the rear running plate assembly 2 fixedly connected with the hinge shaft 61 to rotate by driving the hinge shaft 61 to rotate; in the second embodiment, the rotation driving mechanism 9 (assumed to be fixed to the rear running frame 21) applies a force to the front running frame 11 via the hinge, and the rear running frame 21 is rotated about the rotation shaft 70 hinged to the front running frame 11 by a reaction force, and the rotation of the rear running frame 21 can be performed without interference by the hinged relationship of the rotation shaft 70 between the front and rear hinge bodies. Therefore, based on these two principles, the hinge assembly and the rotation driving mechanism 9 may be configured in other ways in other embodiments provided by the present disclosure, and the present disclosure is not particularly limited thereto. Further, in addition to the hinge construction of the handrail upright 32 in the second embodiment described above, in the specific embodiment provided by the present disclosure, the rotation of the handrail upright 32 with respect to the front running frame 11 may be controlled by the control module 50 by adding a driving mechanism, for example, a driving motor may be added, and by drivingly connecting the handrail upright 32 with the driving motor, the rotation timing, the rotation angle, the rotation direction, and the like of the handrail upright 32 with respect to the front running frame 11 may be controlled. In this regard, the present disclosure is not particularly limited as long as it can satisfy practical needs.

According to some embodiments of the present disclosure, as shown with reference to fig. 17 to 19, the rear end of the front running plate 15 is opposite to the front end of the rear running plate 25 and is formed with a butt seam; the running board assembly further comprises a flexible running board 81, wherein the flexible running board 81 is laid on the upper surfaces of the front running board 15 and the rear running board 25 and covers the butt seam; the flexible running board 81 is tensioned over the running board assembly by the resilient elastic member 82 to allow the rear running board assembly 2 to rotate relatively towards the lower side of the front running board assembly 1. Specifically, the flexible running board 81 is laid on the running board assembly in a tensioning state under the stretching action of the elastic expansion piece 82, on one hand, when a user uses the flexible running board 81, the flexible running board 81 covers the butt joint seam between the front running board 15 and the rear running board 25 in a tensioning manner, normal use is not influenced, and foot discomfort caused by the butt joint seam can be relieved or even avoided, meanwhile, as the flexible running board 81 is arranged between the upper part of the annular running belt 31 and the running board, the annular running belt 31 can be prevented from directly contacting the butt joint seam, so that the damage of the butt joint seam to the annular running belt 31 in the using process is avoided; on the other hand, based on the telescopic property of the elastic telescopic member 82, the flexible running board 81 does not limit the relative movement of the rear running board 25, and allows the rear running board 25 to relatively rotate towards the lower side of the front running board 15, thereby realizing that the running board assembly is folded in a middle arch manner; when the rear running board 25 is rotated reversely until being unfolded (i.e. butted against the front running board 15), the flexible running board 81 is kept to be covered on the butt joint seam between the front running board and the rear running board in a tensioned manner under the action of the elastic expansion piece 82, thereby ensuring the normal use of the running board assembly.

According to some embodiments of the present disclosure, the flexible running board 81 covers the butt seam between the front running board 15 and the rear running board 25, and the elastic expansion member 82 is provided on the lower surface of the front running board 15 or the rear running board 25. Thus, the problem of poor comfort of the sole of the foot during running due to the elastic expansion piece 82 being located between the running board and the annular running belt 31 can be avoided. Here, it should be noted that the size of the elastic expansion member 82 in the up-down direction should be smaller than the width of the gap between the lower surface of the front running board 15 and the lower surface of the rear running board 25 after the folding is completed, so as to avoid affecting the folding effect between the front running board 15 and the rear running board 25. In addition, it should also be noted that in order to ensure normal use, the elastic extension piece 82 cannot extend beyond the end of the running board towards the upper surface, whether the running board is in the unfolded or folded state.

According to some embodiments of the present disclosure, the flexible running board 81 has opposite front and rear ends, and optionally, the front end of the flexible running board 81 may extend forward beyond the front end of the front running board 15 and then extend backward to be connected to the elastic expansion member 82. That is, the flexible running plate 81 may cover the entire upper surface of the front running plate 15, and the front end of the flexible running plate 81 is located below the front running plate 15 and connected to the elastic expansion and contraction member 82. Wherein, when the running board assembly is in the unfolded state, the stretching length of the elastic expansion part 82 is relatively shortest, and after the folding is completed, the stretching length of the elastic expansion part 82 is relatively longest. Can make elastic expansion member 82 remain throughout by stretching state, elastic expansion member 82 has a backward pulling force to be applied all the time to the front end of flexible race board 81 like this, and then run the flexible board 81 of board 15 upper surface and apply a forward and decurrent pulling force all the time before running, make flexible race board 81 laminate in the front and run board 15 upper surface smoothly, avoid when using the treadmill, lay in the flexible board 81 of running board upper surface part and produce the fold, influence the travelling comfort of running.

Alternatively, as shown in fig. 17 to 19, the rear end of the flexible running plate 81 extends rearward beyond the rear end of the rear running plate 25 and then extends forward to be connected to the elastic expansion member 82. That is, the flexible running plate 81 covers the entire upper surface of the rear running plate 25, and the rear end of the flexible running plate 81 is located below the rear running plate 25 and connected to the elastic expansion member 82. Wherein, when running board assembly development state, the tensile length of elasticity extensible member 82 is the shortest relatively, after folding the completion, the tensile length of elasticity extensible member 82 is the longest relatively, can make elasticity extensible member 82 remain throughout by tensile state, a backward pulling force is exerted all the time to the front end of flexible race board 81 to elasticity extensible member 82 like this, and then a backward and decurrent pulling force is exerted all the time to the flexible race board 81 of back race board 25 upper surface, make flexible race board 81 laminate in back race board 25 upper surface smoothly, avoid when using the treadmill, lay in the flexible race board 81 of race board upper surface part and produce the fold, influence the travelling comfort.

In the above embodiment provided in this disclosure, only one end of the flexible running board 81 can be connected to the elastic extensible member 82 in the above manner, and the other end of the flexible running board 81 is fixed to the rear running board 25, and both the front and rear ends of the flexible running board 81 can be connected to the elastic extensible member 82 in the above manner of bending to the lower side of the running board, at this time, the elastic extensible member 82 can be fixed to the corresponding running board body, so as to prevent the flexible running board 81 from shifting in the width direction of the running board assembly.

According to an embodiment of the present disclosure, as shown in fig. 17 to 19, a first end of the elastic extensible member 82 may be fixed on a lower surface of the front running board 15, a front end of the flexible running board 81 extends forward beyond a front end of the front running board 15 and then extends backward to be connected to a second end of the elastic extensible member 82, and a rear end of the flexible running board 81 may be fixed on the rear running board 25, so that the elastic extensible member 82 may be prevented from being located under the butt seam, and the elastic extensible member 82 may be folded during the folding process, thereby reducing requirements for the elastic extensible member 82, for example, a spring, an elastic rubber band, or the like may be selected as the elastic extensible member 82. Wherein, no matter at the expansion or folded state of running board subassembly, all can make the second end of elastic expansion piece 82 be located the below of preceding running board 15 to avoid this second end and flexible running board 81's front end junction, in the repeated expansion or folding in-process, with the preceding terminal surface of preceding running board 15 between take place the friction and influence the life-span of this junction. The rear end of the flexible running board 81 can be bent downwards to cover the rear end of the rear running board 25 and be fixed on the lower surface of the rear running board 25, or the rear end of the flexible running board 81 can be fixed on a certain position of the middle area of the upper surface of the rear running board 25, at this moment, the rear end of the flexible running board 81 protrudes out of the upper surface of the rear running board 25, so that the thickness of the flexible running board 81 is reduced as much as possible, and the influence of the protrusion on the running comfort is reduced as much as possible.

alternatively, as shown in fig. 17 to 19, it is also possible to make the first end of the elastic expansion member 82 fixed on the lower surface of the rear running plate 25, the front end of the flexible running plate 81 fixed on the front running plate 15, and the rear end of the flexible running plate 81 extended rearward beyond the rear end of the rear running plate 25 and then extended forward to be connected to the second end of the elastic expansion member 82. Likewise, in this way, it is avoided that the elastic expansion element 82 is located below the butt seam, which results in the elastic expansion element 82 also being folded during the folding process, thereby reducing the requirements on the elastic expansion element 82, for example, a spring, an elastic rubber band, etc. may be selected as the elastic expansion element 82. Wherein, no matter at the expansion or fold condition of running the board subassembly, all can make the second end of elastic expansion piece 82 be located the below of back running board 25 to avoid this second end and flexible rear end junction of running board 81, expand repeatedly or folding in-process, with the back end face of back running board 25 between take place the friction and influence the life-span of this junction. The front end of the flexible running board 81 can be bent downwards to cover the front end of the front running board 15 and be fixed on the lower surface of the running board body 32, or the front end of the flexible running board 81 can be fixed on a certain position of the middle area of the upper surface of the front running board 15, at this moment, the front end of the flexible running board 81 protrudes out of the upper surface of the front running board 15, so that the thickness of the flexible running board 81 is reduced as much as possible, and the influence of the protrusion on the running comfort is reduced as much as possible.

one of the front end and the rear end of the flexible running board 81 can be connected with the elastic expansion piece 82, and the other is connected with the corresponding running board body; a group of elastic expansion pieces 82 can be respectively arranged below the front running board 15 and the rear running board 25, so that the front end and the rear end of the flexible running board 81 are connected with the second ends of the corresponding elastic expansion pieces 82; and is not particularly limited herein. If the front end of the flexible running board 81 is connected to the elastic extension part 82, a backward friction force is generated between the flexible running board 81 and the endless running belt 31 during running, and the friction force makes the flexible running board 81 move backward against the elastic tension of the elastic extension part 82, which affects the comfort during running.

According to some embodiments of the present disclosure, when the front end of the flexible running board 81 is connected with the elastic expansion member 82 and the rear end is fixed on the rear running board 25, the rear end of the flexible running board 81 may be fixed on the rear running board 25 by means of bonding; alternatively, when the rear end of the flexible running plate 81 is connected to the elastic expansion member 82 and the front end is fixed to the front running plate 15, the front end of the flexible running plate 81 may be fixed to the front running plate 15 by bonding. Utilize the adhesive as the connecting piece, can reduce the front end or the rear end of flexible race board 81 and run the shared space of board body surface connection, when the front end or the rear end of flexible race board 81 are fixed in the upper surface of running the board body, can further reduce the harmful effects to the travelling comfort of running. In other embodiments, the front end or the rear end of the flexible running board 81 can be fixed on the running board body by press fitting, clamping, screwing, and the like, which are all technical solutions that can be easily thought by those skilled in the art, and are not described herein again.

According to some embodiments of the present disclosure, when the elastic expansion member 82 is provided only on the lower surface of the front running board 15 or the rear running board 25, a stud 83 may be fixed on the lower surface of the corresponding front running board 15 or the lower surface of the rear running board 25, and a first end of the elastic expansion member 82 is connected to the stud 83. In particular, the peg 83 and the first end of the elastic expansion element 82 may be configured as any suitable connecting structure, for example, the first end of the elastic expansion element 82 may be designed as a hook, and the peg 83 may have a corresponding hanging ring thereon, which is not limited herein. In addition, when the elastic extensible member 82 is provided on the lower surfaces of both the front running board 15 and the rear running board 25, then the corresponding studs 83 are provided on the lower surfaces of both the front running board 15 and the rear running board 25.

According to some embodiments of the present disclosure, one end of the flexible running plate 81 connected to the elastic expansion member 82 may be provided with a reinforcing structure. Specifically, the reinforcing structure may be a flat or U-shaped housing made of a hard material with a relatively high rigidity, and the housing may be continuously attached to the side surface of the end portion of the flexible running board 81 as wide as the flexible running board 81, and may be continuously and uniformly connected to the flexible running board 81 in the width direction, for example, an adhesive form may be adopted to reinforce the strength of the end portion of the flexible running board 81, prevent one end of the flexible running board 81 connected to the elastic extensible member 82 from being broken under a long-term elastic pulling force, and uniformly distribute the pulling force of the elastic extensible member 82 on the flexible running board 81 in the width direction. In other embodiments, the thickness of the flexible running plate 81 may be increased to form a reinforced structure, so as to increase the strength of the end portion and prolong the service life. And is not particularly limited herein.

According to some embodiments of the present disclosure, the number of the elastic expansion members 82 may be plural, and the plural elastic expansion members 82 are arranged at intervals along the width direction of the running board assembly. Therefore, the flexible running board 81 can be stressed uniformly in the width direction, and the flexible running board 81 is favorably and flatly laid on the upper surface of the running board.

In addition, flexible running board 81 is the soft flexible running board of common use in the folding treadmill of current, and the wearability is good, and thickness is thinner, and is less to lower travelling comfort influence when running, and this disclosure is no longer repeated.

the preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A treadmill, comprising:

A running board assembly comprising:

The front running board assembly (1) comprises a front running frame (11), a front roller (14) and a front running board (15), wherein the front roller (14) is rotatably arranged on the front running frame (11), and the front running board (15) is fixed on the front running frame (11); and

The rear running board assembly (2) comprises a rear running frame (21), a rear roller (24) and a rear running board (25), wherein the rear roller (24) is rotatably arranged on the rear running frame (21), and the rear running board (25) is fixed on the rear running frame (21);

wherein the rear end of the front running rack (11) is hinged to the front end of the rear running rack (21) by a hinge assembly arranged to allow the rear running board assembly (2) to be rotated in a stow direction towards the underside of the front running board assembly (1) to collapse the running board assembly;

An endless running belt (31) wound around the front drum (14) and the rear drum (24) and capable of being driven in accordance with the rotation of the front drum (14) and the rear drum (24);

The rotary driving mechanism (9) is used for driving the rear running board assembly (2) to rotate along the retracting direction or the unfolding direction opposite to the retracting direction;

A running belt adjusting mechanism for driving the rear roller (24) to move in the longitudinal direction of the treadmill to slacken or tighten the endless running belt (31);

the armrest upright post (32) is hinged to the front end of the front running board assembly (1), and the armrest upright post (32) and the front running board assembly (1) can rotate relatively and keep relative positions; and

The control module (50) is used for receiving a spreading signal, a retracting signal, a loosening signal and a tensioning signal, sending a spreading command according to the spreading signal, sending a retracting command according to the retracting signal, sending a loosening command according to the loosening signal and sending a tensioning command according to the tensioning signal, the spreading command is used for the rotary driving mechanism (9) to drive the rear running plate assembly (2) to rotate along the spreading direction until an included angle between the front running plate (15) and the rear running plate (25) is a first preset angle, the retracting command is used for the rotary driving mechanism (9) to drive the rear running plate assembly (2) to rotate along the retracting direction until the included angle between the front running plate (15) and the rear running plate (25) is a second preset angle, the slack command is used for driving the rear roller (24) to move forwards for a first preset distance by the tape running adjusting mechanism, and the tension command is used for driving the rear roller (24) to move backwards for a second preset distance by the tape running adjusting mechanism;

the retracting signal is triggered to be sent when the rear roller (24) moves forwards for the first preset distance, and the tensioning signal is triggered to be sent when the included angle between the front running plate (15) and the rear running plate (25) is the first preset angle.

2. The treadmill of claim 1, wherein the rear roller (24) has a first end (241) and a second end (242) opposite one another in a lateral direction, the tread belt adjustment mechanism comprising a first adjustment mechanism (4A) and a second adjustment mechanism (4B),

The first adjustment mechanism (4A) is provided at the first end (241) of the rear drum (24), drives the first end (241) to move in the longitudinal direction and locks the position of the first end (241),

The second adjustment mechanism (4B) is provided at the second end (242) of the rear roller (24), drives the second end (242) to move in the longitudinal direction and locks the position of the second end (242),

the slack command is used for the first adjusting mechanism (4A) to drive the first end (241) forward by the first preset distance, and the slack command is used for the second adjusting mechanism (4B) to drive the second end (242) forward by the first preset distance, the tension command is used for the first adjusting mechanism (4A) to drive the first end (241) backward by the second preset distance, and the tension command is used for the second adjusting mechanism (4B) to drive the second end (242) backward by the second preset distance;

Alternatively, the second adjustment mechanism (4B) is configured in the same manner as the first adjustment mechanism (4A).

3. The treadmill of claim 2, further comprising:

a running belt position detecting module disposed near the rear roller (24) and detecting a position of a portion of the endless running belt (31) near the rear roller (24) in the lateral direction and emitting a running belt position signal including a first belt deviation signal, a belt positive signal, and a second belt deviation signal;

The control module (50) is in communication connection with a running belt position detection module, the control module (50) is used for receiving the running belt position signal and correspondingly sending out a first deviation correction command, a correction command and a second deviation correction command according to the first deviation signal, the positive belt signal and the second deviation signal, the first deviation correction command is used for the first adjusting mechanism (4A) to drive the first end (241) to move, the second deviation correction command is used for the second adjusting mechanism (4B) to drive the second end (242) to move so as to adjust the rear roller (24) to be parallel to the front roller (14), the correction command is used for the first adjusting mechanism (4A) to lock the position of the first end (241) and the second adjusting mechanism (4B) to lock the position of the second end (242);

Optionally, the first deskew command is used for the first adjustment mechanism (4A) to drive the first end (241) to move one unit distance, and the second deskew command is used for the second adjustment mechanism (4B) to drive the second end (242) to move one unit distance.

4. The treadmill of claim 3, wherein the tread belt position detection module comprises a first position sensor (51) and a second position sensor (52), the first position sensor (51) and the second position sensor (52) being disposed at a predetermined interval from each other in the lateral direction, the endless tread belt (31) shielding only the first position sensor (51) when in the normal position;

When the first position sensor (51) and the second position sensor (52) are both blocked by the annular running belt (31), the running belt position detection module sends out the first belt deviation signal, and at the moment, the first deviation rectifying command is used for driving the first end (241) to move backwards by one unit distance by the first adjusting mechanism (4A);

The running belt position detecting module sends out the belt positive signal when the first position sensor (51) is shielded by the endless running belt (31) and the second position sensor (52) is exposed to the endless running belt (31);

when the first position sensor (51) and the second position sensor (52) are exposed to the annular running belt (31), the running belt position detection module sends out the second belt deviation signal, and at the moment, the second deviation rectifying command is used for the second adjusting mechanism (4B) to drive the second end (242) to move backwards by one unit distance;

Alternatively, the first and second electrodes may be,

the running belt position detection module comprises a plurality of position detection units, the position detection units are arranged in rows and rows in an array manner, the annular running belt (31) only shields a first group of position detection units when located at a normal position, and the number of the position detection units in the first group of position detection units and the position of each position detection unit are determined;

When at least a second group of position detection units are shielded by the annular running belt (31), the running belt position detection module sends out the first belt deviation signal, and at the moment, the first deviation rectification command is used for driving the first end (241) to move backwards by one unit distance by the first adjusting mechanism (4A);

when only the first group of position detection units is shielded by the annular running belt (31), the running belt position detection module sends out a positive belt signal;

When at least a third group of position detection units is shielded by the annular running belt (31), the running belt position detection module sends out the second belt deviation signal, and at the moment, the second deviation rectification command is used for driving the second end (242) to move backwards by one unit distance by the second adjusting mechanism (4B);

Wherein the number of position detection units in the second group of position detection units and the third group of position detection units and the position of each position detection unit are determined, and the number and/or the position of each position detection unit included in the first group of position detection units, the second group of position detection units and the third group of position detection units are different from each other.

5. The treadmill of claim 2, wherein the first adjustment mechanism (4A) comprises a motor (41), a lead screw drive structure, and a roller connection (44), the motor (41) being fixed to the rear running block (21), the roller connection (44) being fixed to a roller shaft of the rear roller (24), the lead screw drive structure comprising a screw (42) and a threaded sleeve (43) cooperating with each other, the screw (42) being fixed to an output shaft of the motor (41) to rotate with the output shaft about a longitudinally extending rotational axis, the threaded sleeve (43) being fixed to the roller connection (44);

alternatively, the first adjusting mechanism (4A) includes a guide bracket (45), the guide bracket (45) being fixed to the rear running frame (21) and formed with a support stopper groove (46), the support stopper groove (46) accommodating the drum link (44) and allowing only the drum link (44) to move in the longitudinal direction.

6. The treadmill of claim 1, wherein the first predetermined distance is equal to the second predetermined distance.

7. The treadmill of claim 1, wherein the rotational drive mechanism (9) is drivingly connected to the hinge assembly;

Optionally, the hinge assembly comprises a hinge shaft (61), the rotation driving mechanism (9) drives the hinge shaft (61) to rotate around the axis of the hinge shaft (61), the hinge shaft (61) is arranged in the rear end of the front running frame (11) and the front end of the rear running frame (21) in a penetrating manner, the rear end of the front running frame (11) and the hinge shaft (61) can rotate relatively, and the relative rotation between the hinge shaft (61) and the front end of the rear running frame (21) is limited through a circumferential limiting structure;

Alternatively, the hinge shaft (61) has a profiled cross section, the circumferential limit structure is a fitting structure between the outer circumferential surface of the hinge shaft (61) and a profiled hole provided at the front end of the rear running frame (21), and the hinge assembly includes a bushing (62), the bushing (62) has a profiled shaft hole fitted with the hinge shaft (61) and has a circular outer circumferential surface to be rotatably fitted in a mounting hole at the rear end of the front running frame (11);

optionally, the shaped cross-section is a hexagonal cross-section;

optionally, the rotation driving mechanism (9) is fixed on the front running frame (11) and is constructed as a speed reduction motor (91), and the articulated shaft (61) is in transmission connection with an output shaft of the speed reduction motor (91);

alternatively, the hinge assembly includes a front hinge body (71), a rear hinge body (74), a rotation shaft (70), a first front hinge shaft (72), a first rear hinge shaft (73), a second front hinge shaft (75), and a second rear hinge shaft (76),

the front end of the front hinge main body (71) extends into the rear end of the front running frame (11) and is hinged to the rear end of the front running frame (11) through the first front hinge shaft (72), the first front hinge shaft (72) penetrates through a front long hole (130) formed in the front end of the front running frame (11) and can move along the front long hole (130), the rear end of the front hinge main body (71) extends into the front end of the rear running frame (21) and is hinged to the front end of the rear running frame (21) through the first rear hinge shaft (73), and the first rear hinge shaft (73) penetrates through a shaft hole formed in the front end of the rear running frame (21);

the front end of the rear hinge main body (74) extends into the rear end of the front running frame (11), and is hinged to the rear end of the front running frame (11) through the second front hinge shaft (75), the second front hinge shaft (75) is arranged in a shaft hole formed in the rear end of the front running frame (11), the rear end of the rear hinge main body (74) extends into the front end of the rear running frame (21), and is hinged to the front end of the rear running frame (21) through the second rear hinge shaft (75), the second rear hinge shaft (76) is arranged in a rear long hole (230) formed in the front end of the rear running frame (21) in a penetrating manner and can move along the rear long hole (230),

the front long hole (130) and the rear long hole (230) both extend in the longitudinal direction, the first front hinge shaft (72) is located at the front side of the second front hinge shaft (75), the first rear hinge shaft (73) is located at the front side of the second rear hinge shaft (76),

The rear end of the front hinge body (71) and the front end of the rear hinge body (72) are crossed and pivotally connected at the crossed position through the rotating shaft (70), the rotary driving mechanism (9) is fixed on the running frame assembly and drives the first front hinge shaft (72) or the second rear hinge shaft (76) to move in the corresponding front long hole (130) or rear long hole (230),

A connecting rod (33) is arranged in the front running frame (11), the front end of the connecting rod (33) extends forwards from the front running frame (11) and is hinged to the armrest upright post (32), and the rear end of the connecting rod (33) extends backwards and is pivotally connected to the first front hinged shaft (72);

Alternatively, the front hinge body (71) is constructed in a C-shaped structure including a basic section and a front end bent downward from a front side of the basic section and a rear end bent downward from a rear side of the basic section, the rotation shaft (70) is inserted through a rear side of the basic section, and the basic section extends parallel to the longitudinal direction when the first front hinge shaft (72) is located at a front limit position in the front long hole (130) and the second rear hinge shaft (76) is located at a rear limit position in the rear long hole (230);

Alternatively, the rear hinge body (74) is constructed in a C-shaped structure including a base section and a front end bent downward from a front side of the base section and a rear end bent downward from a rear side of the base section, the rotation shaft (70) is inserted through the front side of the base section, and the base section extends parallel to the longitudinal direction when the first front hinge shaft (72) is located at a front limit position in the front long hole (130) and the second rear hinge shaft (76) is located at a rear limit position in the rear long hole (230);

Optionally, the rotary driving mechanism (9) is configured as a motor push rod (92), the motor push rod (92) is fixed in the rear running frame (21), the motor push rod (92) extends and retracts in the longitudinal direction, and the end of the motor push rod (92) is connected to the second rear hinge shaft (76);

Optionally, the front running rack (11) comprises a front longitudinal pipe (12) and a front connecting pipe (13) arranged at the rear end of the front longitudinal pipe (12), and the front long hole (130) is arranged on the side surface of the front connecting pipe (13); the rear running frame (21) comprises a rear longitudinal pipe (22) and a rear connecting pipe (23) arranged at the front end of the rear longitudinal pipe (22), and the rear long hole (230) is formed in the side surface of the rear connecting pipe (23).

8. The treadmill of claim 1, wherein the rear end of the front running board (15) is opposite to the front end of the rear running board (25) and is formed with a butt seam;

The running board assembly further comprises a flexible running board (81), the flexible running board (81) is laid on the upper surfaces of the front running board (15) and the rear running board (25) and covers the butt seam;

The flexible running board (81) is tensioned on the running board assembly through an elastic telescopic piece (82) so as to allow the rear running board assembly (2) to relatively rotate towards the direction of the lower side of the front running board assembly (1).

9. the treadmill according to claim 8, characterized in that the elastic telescopic element (82) is provided on the lower surface of the front running board (15) or the rear running board (25);

optionally, the flexible running board (81) has opposite front and rear ends, the front end of the flexible running board (81) extends forwards beyond the front end of the front running board (15) and then extends backwards to be connected to the elastic telescopic element (82), and/or the rear end of the flexible running board (81) extends backwards beyond the rear end of the rear running board (25) and then extends forwards to be connected to the elastic telescopic element (82);

optionally, one end of the flexible running board (81) connected to the elastic telescopic piece (82) is provided with a reinforcing structure;

optionally, the number of the elastic expansion parts (82) is multiple, and the multiple elastic expansion parts (82) are arranged at intervals along the width direction of the running board assembly.

10. The treadmill of claim 9, wherein a first end of the elastic expansion member (82) is fixed on a lower surface of the front running board (15), a front end of the flexible running board (81) extends forward beyond a front end of the front running board (15) and then extends backward to be connected to a second end of the elastic expansion member (82), a rear end of the flexible running board (81) is fixed to the rear running board (25), or,

A first end of the elastic telescopic member (82) is fixed on the lower surface of the rear running plate (25), a front end of the flexible running plate (81) is fixed on the front running plate (15), and a rear end of the flexible running plate (81) extends backwards to pass through the rear end of the rear running plate (25) and then extends forwards so as to be connected with a second end of the elastic telescopic member (82);

optionally, the rear end of the flexible running board (81) is fixed to the rear running board (25) by means of bonding, or the front end of the flexible running board (81) is fixed to the front running board (15) by means of bonding;

optionally, a stud (83) is fixed on the lower surface of the front running plate (15) or the lower surface of the rear running plate (25), and a first end of the elastic expansion member (82) is connected to the stud (83).