A treadmill with anti - roll function

Abstract

A treadmill with anti - roll function includes a frame unit, a running belt unit, a power unit, an anti - roll unit, and a displacement sensing unit. The belt belt unit includes a belt belt having a front end portion, and a rear end portion. The power unit includes a driving motor, and a transmission mechanism. The driving motor is used for driving the running belt to operate via the transmission mechanism. The anti - roll unit includes a anti - roll shield disposed on the frame unit and adjacent to the rear end portion, a anti - roll baffle disposed on the anti - roll shield, and at least one biasing member disposed between the anti - roll shield and the anti - roll baffle. An interval space is formed between the anti - roll shield and the rear end portion, the interval space having a top opening. When the anti - roll baffle is in a blocking state, the anti - roll baffle blocks the top opening. When the anti - roll baffle is in an open state, the anti - roll baffle does not block the top opening, and the anti - roll baffle triggers the displacement sensing unit. The biasing member has a potential energy that drives the anti - roll baffle to move toward the blocking state. The displacement sensing unit is disposed on the frame unit and is adjacent to the rear end portion.

Description

Treadmills that prevent roll-in This invention relates to a treadmill, and more particularly to a treadmill that prevents entanglement. As shown in Figures 1 and 2, a conventional treadmill (Taiwan Invention Patent No. 202300199) includes a frame 1, a conveyor belt 2 disposed on the frame 1, a protective cover 3 disposed on the frame 1 and adjacent to the rear end of the conveyor belt 2, and a control system 4. The conveyor belt 2 can define a clamping area 201 adjacent to its rear end, the clamping area 201 being an area between the protective cover 3 and the conveyor belt 2. The control system 4 includes a controller 401, a sensor 402 located near the clamping area 201, an emergency brake 403 for stopping the conveyor belt 2, and a drive mechanism 404 for driving the conveyor belt 2. Therefore, when an external object (such as clothing or a person's limbs, etc.) is detected near or inside the clamping area 201, the sensor 402 sends a relevant signal to the controller 401 to shut off the power to the drive mechanism 404, causing the conveyor belt 2 to stop operating and allowing the clamped external object to be removed. Additionally, the sensor 402 can also cause the controller 402 to activate the emergency brake 403 to stop the conveyor belt 2. However, in actual use, since the entrainment area 201 is an open area, the sensor 402 is prone to problems such as failing to detect the external object or falsely detecting it. Moreover, since the protective cover 3 cannot prevent the external object from being rolled into the conveyor belt 2, when the sensor 402 detects the external object, the sensor 402 is usually already rolled between the protective cover 3 and the conveyor belt 2, or even rolled under the conveyor belt 2. Therefore, the object of the present invention is to provide an anti-entanglement treadmill that overcomes at least one disadvantage of the prior art. Therefore, the treadmill of the present invention, which is resistant to entanglement, includes a frame unit, a running belt unit, a power unit, an anti-entanglement unit, and a displacement sensing unit. The running belt unit includes a front roller rotatably disposed at the front end of the frame unit, a rear roller rotatably disposed at the rear end of the frame unit, and a running belt disposed on the front roller and the rear roller, the running belt having a front end and a rear end. The power unit includes a drive motor disposed on the frame unit and a transmission mechanism. The drive motor has an output shaft, and the transmission mechanism is disposed between the output shaft and the front roller. The drive motor is used to drive the front roller to rotate via the transmission mechanism. The anti-winding unit includes an anti-winding cover disposed on the frame unit and adjacent to the rear end, an anti-winding baffle disposed on the anti-winding cover, and at least one biasing member disposed between the anti-winding cover and the anti-winding baffle. The anti-winding cover extends rearward and upward relative to the rear end, and a gap space is formed between the anti-winding cover and the rear end. The gap space has a top opening. The anti-winding baffle can switch between a blocked state and an open state relative to the anti-winding cover. When the anti-winding baffle is in the blocked state, the anti-winding baffle blocks the top opening. When the anti-winding baffle is in the open state, the anti-winding baffle does not block the top opening. The biasing member has the potential energy to drive the anti-winding baffle to switch to the blocked state. The displacement sensing unit is disposed on the rack unit and adjacent to the rear end. When the anti-roll baffle is in the open state, the anti-roll baffle triggers the displacement sensing unit. The advantages of this invention are as follows: By utilizing the anti-rollover shield and anti-rollover baffle design of the anti-rollover unit, when an external object falls onto the baffle, the baffle initially blocks the object, preventing it from being easily pulled directly into the interval space by the running belt. Furthermore, by utilizing the anti-rollover unit and displacement sensing unit design, when an external object presses down on the anti-rollover baffle and passes through the top opening of the interval space, the baffle portion of the anti-rollover baffle will definitely trigger the displacement sensing unit, causing the drive motor to lose power and stopping the running belt's operation. Thus, this invention can clearly sense whether an external object has fallen into the interval space, avoiding the problem of unclear sensing. Referring to Figures 3, 4, and 5, an embodiment of the anti-roll-in treadmill 100 of the present invention is shown. The treadmill 100 includes a frame unit 10, a running belt unit 20, a power unit 30, an anti-roll-in unit 40, a displacement sensing unit 50, and a control unit 60. In this embodiment, the rack unit 10 includes a base frame 11 and a handle bracket 12 disposed on the base frame 11. The base frame 11 has two side frame portions 111 spaced apart in a left-right direction and extending in a front-back direction, each side frame portion 111 defining an internal space 112. The handle bracket 12 is disposed on the side frame portions 111. As shown in Figures 3 and 4, the running belt unit 20 includes a front roller 21 rotatably disposed at the front end of the side frame portion 111 of the base frame 11 of the frame unit 10, a rear roller 22 rotatably disposed at the rear end of the side frame portion 111 of the base frame 11 of the frame unit 10, and a running belt 23 disposed between the front roller 21 and the rear roller 22. The running belt 23 has a front end portion 231 and a rear end portion 232. The power unit 30 is disposed on the base frame 11 of the frame unit 10, and includes a drive motor 31 disposed on the base frame 11 and a transmission mechanism 32. The drive motor 31 has an output shaft 311. In this embodiment, the output shaft 311 has a drive wheel portion 312. The transmission mechanism 32 is disposed between the output shaft 311 and the front roller 21. In this embodiment, the transmission mechanism 32 has a driven wheel 321 coaxially disposed with the front roller 21, and a transmission belt 322 disposed between the driving wheel 312 and the driven wheel 321. The drive motor 31 is used to drive the front roller 21 to rotate via the transmission mechanism 32, so as to drive the running belt 23. As shown in Figures 3, 4, and 5, the anti-winding unit 40 includes an anti-winding cover 41 disposed on the frame unit 10 and adjacent to the rear end 232, an anti-winding baffle 42 disposed on the anti-winding cover 41, and several biasing members 43 disposed between the anti-winding cover 41 and the anti-winding baffle 42 (see Figure 6). As shown in Figures 6, 7, and 8, the anti-rolling cover 41 extends rearward and upward relative to the rear end portion 232, forming a gap space 44 between the anti-rolling cover 41 and the rear end portion 232. The gap space 44 has a top opening 441. In this embodiment, the anti-rolling cover 41 extends along the left-right direction and is disposed between the side frame portions 111. The anti-rolling cover 41 has a bottom end portion 411 located below the rear end portion 232 of the running belt 23 in a vertical direction, and a top end portion 412 located behind the rear end portion 232 of the running belt 23 in a front-back direction. As shown in Figures 7, 8, and 9, in this embodiment, the anti-rolling baffle 42 has a baffle portion 421 pivotally mounted on the anti-rolling cover 41, and a trigger arm portion 422 extending outward from the baffle portion 421 in the left-right direction. The trigger arm portion 422 is inserted into the internal space 112 of one side frame portion 111 and is located above the displacement sensing unit 50. The anti-roll baffle 42 can switch between a blocked state (see Figures 7 and 9) and an open state (see Figures 11 and 12) relative to the anti-roll cover 41. As shown in Figures 6 and 7, the biasing members 43 are spaced apart in the left-right direction between the anti-rolling cover 41 and the baffle portion 421. Each biasing member 43 is a torsion spring, and the biasing members 43 have the potential energy to drive the anti-rolling baffle 42 to change toward the blocking state (see Figures 7 and 9). As shown in Figures 5 and 7, when the anti-roll-up baffle 42 is in the blocking state, the baffle portion 421 of the anti-roll-up baffle 42 blocks the top opening 441. As shown in Figures 10 and 11, when the anti-roll-up baffle 42 is in the open state, the baffle portion 421 of the anti-roll-up baffle 42 does not block the top opening 441. As shown in Figures 5, 8, and 9, the displacement sensing unit 50 is disposed on the frame unit 10 and adjacent to the rear end 232. In this embodiment, the displacement sensing unit 50 includes a sensor switch 51 disposed in the internal space 112 of one side frame portion 111. The sensor switch 51 is located below the trigger arm portion 422. The sensor switch 51 is a contact sensor switch, such as a limit switch. It is understood that in other variations of this embodiment, the sensor switch 51 can be replaced with a non-contact sensor switch, such as a light sensor switch. As shown in Figures 10 and 12, when the anti-roll-up baffle 42 is in the open state, the trigger arm 422 of the anti-roll-up baffle 42 triggers the inductive switch 51, causing the inductive switch 51 to generate a sensing signal. As shown in Figures 3, 4, and 5, the control unit 60 is disposed on the handle bracket 12. The control unit 60 is electrically connected to the drive motor 31 and the inductive switch 51. The control unit 60 has a control panel 61, as shown in Figures 10 and 12. When the anti-rollover baffle 42 is in the open state, the trigger arm 422 of the anti-rollover baffle 42 triggers the inductive switch 51. The sensing signal generated by the inductive switch 51 is transmitted to the control unit 60, and the control unit 60 stops the drive motor 31 from operating based on the sensing signal. Alternatively, it can be understood that the inductive switch 51 can be directly electrically connected to the drive motor 31. In this way, when the anti-rollover baffle 42 is in the open state, the trigger arm 422 of the anti-rollover baffle 42 triggers the sensing signal generated by the inductive switch 51, which can directly cut off the power to the drive motor 31 without going through the control unit 60, allowing for a rapid response and improving safety. Therefore, as shown in Figures 5, 7, and 9, during the operation of the running belt 23, the baffle portion 421 of the anti-roll-up baffle 42 in the blocking state will block the top opening 441 of the interval space 44. At this time, if an external object (not shown) falls onto the baffle portion 421 of the anti-roll-up baffle 42 or is rolled onto the baffle portion 421 of the anti-roll-up baffle 42 by the running belt 23, the anti-roll-up baffle 42 will initially block the external object, preventing it from being easily rolled directly into the interval space 44 by the running belt 23. Subsequently, as shown in Figures 10, 11, and 12, if the weight or force exerted by the external object on the anti-roll-up baffle 42 overcomes the elastic restoring force of the biasing members 43, forcing the anti-roll-up baffle 42 to swing to the open state, the baffle portion 421 of the anti-roll-up baffle 42 will press down on the displacement sensor. When the sensor switch 51 of the detection unit 50 is triggered, the sensing signal generated by the sensor switch 51 is transmitted to the control unit 60 (see Figure 3). The control unit 60 (see Figure 3) will then automatically cut off the power to the drive motor 31 (see Figure 4) based on the sensing signal, and the drive motor 31 (see Figure 4) will immediately stop driving the running belt 23. In other words, when an external object passes through the top opening 441 of the interval space 44, the running belt 23 will immediately stop running to prevent the external object from being pulled into the depth of the interval space 44 by the running belt 23, so that the external object will not be seriously damaged. In this way, the user can easily remove the external object. After the external object is removed, the anti-roll baffle 42 will spring back to the blocking state (see Figures 7 and 9). Based on the above description, the advantages of the present invention can be summarized as follows: I. Compared with the prior art, the present invention utilizes the design of the anti-roll-up shield 41 of the anti-roll-up unit 40 in conjunction with the anti-roll-up baffle 42. When an external object falls on the anti-roll-up baffle 42, the anti-roll-up baffle 42 will initially block the external object, so that the external object will not be easily rolled into the interval space 44 by the running belt 23. Second, the present invention utilizes the design of the anti-roll-up unit 40 in conjunction with the displacement sensing unit 50. When an external object presses down on the anti-roll-up baffle 42 and passes through the top opening 441 of the interval space 44, the baffle portion 421 of the anti-roll-up baffle 42 will definitely press down on the sensing switch 51 of the displacement sensing unit 50, thereby immediately triggering the sensing switch 51, de-energizing the drive motor 31, and stopping the operation of the running belt 23. Compared with the prior art, the present invention can clearly sense whether the external object has fallen into the interval space 44, without the problem of unclear sensing. In summary, the anti-entrapment treadmill of the present invention not only prevents external objects from being easily pulled directly into the interval space by the running belt, but also clearly senses whether an external object has fallen into the interval space without the problem of unclear sensing, thus truly achieving the purpose of the present invention. However, the above description is merely an embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the patent specification shall still fall within the scope of the patent of the present invention. 100: Treadmill 10: Frame Unit 11: Base 111: Side Frame 112: Internal Space 12: Handrail Bracket 20: Running Belt Unit 21: Front Roller 22: Rear Roller 23: Running Belt 231: Front End 232: Rear End 30: Power Unit 31: Drive Motor 311: Output Shaft 312: Drive Wheel 32: Transmission Mechanism 321: Driven Wheel 322: Transmission Belt 40: Anti-Roll Unit 41: Anti-Roll Cover 411: Bottom End of Cover 412: Top End of Cover 42: Anti-Roll Baffle 421: Baffle 422: Trigger Arm 43: Biasing Component 44: Spacing Space 441: Top Opening 50: Displacement Sensing Unit 51: Sensor Switch 60: Control Unit 61: Control Panel 1: Frame 2: Conveyor Belt 201: Belt Gripping Area 3: Protective Cover 4: Control System 401: Controller 402: Sensor 403: Emergency Brake 404: Drive Mechanism Other features and effects of the present invention will be clearly presented with reference to the embodiments shown in the figures, wherein: Figure 1 is a control block diagram of a conventional treadmill control system; Figure 2 is a rear view of the treadmill; Figure 3 is an assembled perspective view of an embodiment of the anti-roll-up treadmill of the present invention; Figure 4 is an incomplete cross-sectional view of the embodiment illustrating a power unit of the embodiment; Figure 5 is a partial assembled perspective view illustrating an anti-roll-up unit and a displacement sensing unit of the embodiment; Figure 6 is a partially exploded perspective view illustrating the anti-roll-up unit and the displacement sensing unit; Figure 7 is an incomplete cross-sectional view taken along line VII-VII in Figure 4, illustrating an anti-roll-up baffle of the anti-roll-up unit in a blocking state; Figure 8 is an incomplete cross-sectional view taken along line VIII-VIII in Figure 7; Figure 9 is an incomplete cross-sectional view taken along line IX-IX in Figure 8, illustrating the anti-roll-up baffle in the blocking state; Figure 10 is a view similar to Figure 5, illustrating the anti-roll-up baffle in an open state. Figure 11 is a view similar to Figure 7, illustrating the anti-roll baffle in the open state; and Figure 12 is a view similar to Figure 9, illustrating the anti-roll baffle in the open state, triggering the displacement sensing unit. 111: Side frame 40: Anti-roll unit 41: Anti-roll-up cover 411: Bottom end of the protective cover 412: Top of the protective cover 42: Anti-roll baffle 421: Baffle section 422: Trigger arm 43: Eccentric pressure component 50: Shift sensing unit 51: Induction switch

Claims

1. A treadmill with anti-entanglement capability includes: a frame unit; a running belt unit including a front roller rotatably disposed at the front end of the frame unit, a rear roller rotatably disposed at the rear end of the frame unit, and a running belt disposed between the front roller and the rear roller, the running belt having a front end and a rear end; and a power unit including a drive motor disposed in the frame unit and a transmission mechanism, the drive motor having an output shaft, the transmission mechanism being disposed between the output shaft and the front roller, the drive motor being used to drive the front roller to rotate via the transmission mechanism. An anti-winding unit includes an anti-winding cover disposed on the frame unit and adjacent to the rear end, an anti-winding baffle disposed on the anti-winding cover, and at least one biasing member disposed between the anti-winding cover and the anti-winding baffle. The anti-winding cover extends rearward and upward relative to the rear end, forming a gap space between the anti-winding cover and the rear end. The gap space has a top opening. The anti-winding baffle can switch between a blocked state and an open state relative to the anti-winding cover. When the anti-winding baffle is in the blocked state, it blocks the top opening. When the anti-winding baffle is in the open state, it does not block the top opening. The biasing member has the potential energy to drive the anti-winding baffle to switch to the blocked state. A displacement sensing unit is disposed on the frame unit and adjacent to the rear end. When the anti-winding baffle is in the open state, the anti-winding baffle triggers the displacement sensing unit. The treadmill with anti-entrapment capability as described in claim 1, wherein... The frame unit includes a base frame having two side frames spaced apart in a left-right direction and extending in a front-back direction, each side frame defining an internal space. The running belt unit and the power unit are disposed on the base frame. The anti-roll guard extends in the left-right direction and is disposed between the side frames. The anti-roll baffle has a baffle portion pivotally mounted on the anti-roll guard and a trigger arm portion extending outward from the baffle portion in the left-right direction. The trigger arm portion passes through the internal space of one of the side frames. The biasing member is disposed between the anti-roll guard and the baffle portion. The displacement sensing unit includes an inductive switch disposed in the internal space of one of the side frames. When the anti-roll baffle is in the blocking state, the baffle portion of the anti-roll baffle blocks the top opening. When the anti-roll baffle is in the open state, the baffle portion of the anti-roll baffle does not block the top opening, and the trigger arm portion of the anti-roll baffle triggers the inductive switch. The treadmill with anti-entrapment capability as described in claim 2, wherein... The anti-roll-up unit includes several biasing members, which are spaced apart in the left-right direction between the anti-roll-up cover and the baffle portion. Each biasing member is a torsion spring. The treadmill with anti-entrapment capability as described in claim 2, wherein... The anti-rolling cover has a bottom end portion located below the rear end of the running belt in a vertical direction, and a top end portion located behind the rear end of the running belt in a front-back direction. The anti-rollover treadmill as described in claim 2 further includes a control unit. The frame unit also includes a handle bracket disposed on the side frame of the base frame. The control unit is disposed on the handle bracket. The control unit is electrically connected to the drive motor and the inductive switch. When the anti-rollover baffle is in the open state, the trigger arm of the anti-rollover baffle triggers the inductive switch of the displacement sensing unit. The inductive switch generates a sensing signal and transmits it to the control unit. The control unit stops the drive motor from operating according to the sensing signal. The treadmill with anti-entrapment capability as described in claim 2, wherein... This inductive switch is a contact-type inductive switch. The treadmill with anti-entrapment capability as described in claim 2, wherein... The inductive switch is electrically connected to the drive motor. When the anti-roll-up baffle is in the open state, the trigger arm of the anti-roll-up baffle triggers the inductive switch of the displacement sensing unit. The inductive switch generates a sensing signal to directly cut off the power to the drive motor. The treadmill with anti-entrapment capability as described in claim 1, wherein... The output shaft of the drive motor has a driving wheel section, the transmission mechanism has a driven wheel coaxially arranged with the front roller, and a transmission belt disposed between the driving wheel section and the driven wheel.

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