CN111672056A - A vertical standing twist waist trainer - Google Patents

Abstract

The invention provides a vertical standing waist-twisting trainer, comprising a frame body, a massage mechanism, a counterweight mechanism, an adjustable pedal mechanism and a hand-held rotating mechanism, wherein the hand-held rotating mechanism is fixedly arranged on the upper part of the frame body, so The adjustable pedal mechanism is arranged at the lower part of the frame body, the massage mechanism is arranged between the adjustable pedal mechanism and the hand-held rotating mechanism, the massage mechanism is installed on the frame body, and the The weight mechanism is installed on the frame body, and the hand-held rotating mechanism is connected with the counterweight mechanism through a rope, so as to convert the gravity of the counterweight in the counterweight mechanism into the rotation resistance of the hand-held rotation mechanism. The invention effectively solves the technical defects of the prior art that the waist-twisting training device has no standing training, no massage mechanism during training, and no visual motion information.

Description

A vertical standing twist waist trainer

technical field

The invention belongs to the technical field of fitness equipment, and in particular relates to a vertical standing waist twisting trainer.

Background technique

At present, the upper seated waist twisting trainer on the market, when in use, the user sits on the seat cushion, the chest is attached to the chest cushion, the two handles are held with both hands, the lower part of the body is fixed, and the upper part of the body is twisted, so as to achieve exercise The purpose of abdominal muscle group and waist muscle group; when using the upper and lower seated waist twisting trainer on the market, the user sits on the seat cushion, the chest is attached to the chest cushion, and the two handles are held with both hands to fix the upper part of the body. Twist the lower part of the body, so as to achieve the purpose of exercising the abdominal muscles and waist muscles; the upper shoulder type waist twisting trainer on the market, when in use, the user sits on the seat cushion, the shoulders are attached to the shoulder pad, and the hands hold Two handles, fix the lower part of the body, and twist the upper part of the body, so as to achieve the purpose of exercising the abdominal muscles and lumbar muscles; the lower kneeling waist twisting trainer on the market, the user kneels on the cushion when in use, Stick both sides of the legs on the side pad, hold the two handles with both hands, fix the upper part of the body, and twist the lower part of the body, so as to achieve the purpose of exercising the abdominal muscles and waist muscles.

When the above-mentioned four types of existing products are used, there is no massage mechanism on the back of the user, which cannot assist the user to relax the muscles and speed up the circulation of qi and blood; This training method has poor training effect and poor user experience; the traditional waist-twisting trainer has problems such as inconvenient adjustment and unreasonable design in the adjustment mechanism of the seat; and there is no information content on the training equipment, Exercise instruction videos and exercise prescriptions, etc.

Invention content:

Based on the above defects, the present invention provides a vertical standing waist twisting trainer. The invention effectively solves the technical defects of the prior art that the waist-twisting training device has no standing training, no massage mechanism during training, and no visual motion information.

The present invention is achieved through the following technical solutions:

A vertical standing waist-twisting trainer, comprising a frame body, a massage mechanism, a counterweight mechanism, an adjustable pedal mechanism and a hand-held rotation mechanism, the hand-held rotation mechanism is fixedly arranged on the upper part of the frame body, and the adjustable The pedal mechanism is arranged at the lower part of the frame body, the massage mechanism is arranged between the adjustable pedal mechanism and the hand-held rotation mechanism, the massage mechanism is installed on the frame body, and the weight mechanism is installed On the frame body, the hand-held rotating mechanism is connected with the counterweight mechanism through a rope, so as to convert the gravity of the counterweight in the counterweight mechanism into the rotation resistance of the hand-held rotary mechanism. The massage mechanism may utilize a rotating massage wheel.

Further, the adjustable pedal mechanism includes: a foot pedal, a first connecting rod, a second connecting rod, and a height adjusting plate, and one end of the first connecting rod and the second connecting rod are respectively hinged on the frame body , the other ends of the first link and the second link are respectively hinged with the foot pedal, the height adjustment plate is fixedly connected with the frame body, and the height adjustment plate is provided with a plurality of The first adjustment hole, the connecting rod corresponding to the first adjustment hole is provided with a first pin hole, and the first adjustment hole and the first pin hole are fixed by a pin.

Further, it also includes: a gas spring, one end of the gas spring is hinged on the footboard, and the other end of the gas spring is hinged on the frame body.

Further, the hand-held rotating mechanism includes: a rope reel, the rope reel is installed on the frame for lateral rotation, a plurality of second adjustment holes are opened on the rope reel along the arc, and the rope reel is coaxial A hand-held handle is provided, the hand-held handle is provided with a second pin hole, the second adjustment hole and the second pin hole are fixed by a pin, the rope reel is fixed with a rope, and the other end of the rope connected with the counterweight mechanism.

Further, the massage mechanism includes: a massage wheel bracket, a massage wheel, a massage wheel adjustment frame, and an adjustment frame cover, the massage wheel is rotatably mounted on the massage wheel bracket, and the massage wheel adjustment frame is fixed on the massage wheel. On the bracket, the massage wheel adjustment frame is provided with a plurality of third adjustment holes, the adjustment frame sleeve is fixed on the frame body, the adjustment frame sleeve is provided with a third pin hole, the massage wheel The adjusting frame is slidably matched with the adjusting frame sleeve and is fixed by a bolt through the third adjusting hole and the third bolt hole.

Further, the counterweight mechanism includes: a counterweight stand, a counterweight iron, a counterweight iron guide rod, a selection pin, and a counterweight iron support rod, and the counterweight iron has a plurality of settings and is sleeved on the counterweight iron. On the counterweight iron guide rod and on the counterweight iron support rod, the counterweight iron is provided with a fourth pin hole, and the counterweight iron support rod is provided with a plurality of corresponding fourth pin holes. A fifth pin hole, the selection pin is fixed with the fourth pin hole and the fifth pin hole, one end of the counterweight iron support rod is fixed with the rope, and the selection pin is a magnetic pin.

Further, it also includes a magnet and a tablet computer, the magnet is fixedly arranged on the uppermost counterweight iron, a magnetic induction sensor is fixedly arranged on the counterweight stand, and the tablet computer is fixedly installed on the counterweight stand, The magnetic induction sensor is electrically connected with the tablet computer.

Compared with the prior art, the beneficial technical effects of the present invention are:

(1) In the present invention, the hand-held rotating mechanism is arranged on the upper part of the frame body, and the adjustable pedal mechanism is arranged at the lower part of the frame body, so as to realize that the user can perform training in a standing posture, which changes the sitting position of the traditional training device. The standing training method is more in line with human dynamics and the training effect is better. According to the different heights of the user, the adjustable pedal mechanism can be used to adjust the height; through the setting of the massage mechanism, it can be filled in the traditional training device. There is no blank of massage function; the hand-held rotating mechanism is connected with the counterweight mechanism through a rope, so that the gravity of the counterweight in the counterweight mechanism can be converted into the rotation resistance of the hand-held rotary mechanism, so as to achieve the weight-bearing effect during training.

(2) The present invention realizes the height adjustment of the foot pedal relative to the frame body through the hinged connection between the link mechanism and the frame body, and the height adjustment with this mechanism can make the overall mechanical structure simple, easy to maintain and repair, and durable. Hold on.

(3) In the present invention, by arranging the gas spring between the frame body and the foot pedal, the gas spring can bear a certain mechanical resistance and the weight of the foot pedal when the height is adjusted manually, so as to make it easier to carry out adjust.

(4) The present invention is realized by rotating and installing the rope reel on the frame body, as well as a hand-held handle set on the frame body and coaxially rotating with the rope reel, and connecting it with the counterweight mechanism through a rope, so that when the user When two hands hold the hand-held handle and twist the body, the rope reel can rotate synchronously with the hand-held handle through the second latch, and further stretch the connecting rope, thereby raising the counterweight mechanism.

(5) In the present invention, the massage wheel is connected to the massage wheel bracket through the rotation, so that the user can touch the massage wheel and rotate together while twisting the waist, so as to achieve the purpose of massage. Wheel front and rear adjustment.

(6) In the present invention, by setting the selection pin to be magnetic, it can ensure that the selection pin is not easy to fall off, so as to improve the safety during the movement.

(7) In the present invention, a permanent magnet is arranged on the uppermost counterweight iron, and a magnetic induction sensor is fixedly arranged on the counterweight stand, so as to count the number of twisting motions; by installing a flat plate on the counterweight stand The computer can preset corresponding training information in the tablet computer to realize training guidance for the user during exercise, and by connecting the magnetic induction sensor to the tablet computer, the display of the number of exercises on the tablet computer can be realized.

Description of drawings:

1 is a schematic three-dimensional structure diagram of an embodiment of the present invention;

2 is a schematic side view of the structure of an adjustable pedal mechanism according to an embodiment of the present invention;

FIG. 3 is a schematic three-dimensional structural diagram of an adjustable pedal mechanism viewed obliquely according to an embodiment of the present invention;

4 is a schematic perspective view of a three-dimensional structure of a handheld rotating mechanism from an oblique top view according to an embodiment of the present invention;

5 is a schematic diagram of a three-dimensional structure of a handheld rotating mechanism viewed obliquely upwards according to an embodiment of the present invention;

6 is a schematic three-dimensional structural diagram of a massage mechanism according to an embodiment of the present invention;

7 is a schematic three-dimensional structural diagram of a massage wheel adjusting frame of a massage mechanism according to an embodiment of the present invention;

FIG. 8 is a schematic three-dimensional structural diagram of a counterweight mechanism according to an embodiment of the present invention.

Description of reference numbers:

1-frame body, 2-hand-held rotating mechanism, 201-rope reel, 202-second adjustment hole, 203-hand-held handle, 204-second bolt hole, 3-adjustable pedal mechanism, 301-foot pedal, 302 -First connecting rod, 303 - Second connecting rod, 304 - Height adjustment plate, 305 - First adjustment hole, 306 - First pin hole, 4 - Massage mechanism, 401 - Massage wheel, 402 - Massage wheel bracket, 403 -Massage wheel adjustment frame, 404-adjustment frame cover, 405-third bolt hole, 406-third adjustment hole, 5-counterweight mechanism, 501-counterweight stand, 502-counterweight iron guide rod, 503-distribution Heavy iron, 504-counterweight iron support rod, 505-selection latch, 506-magnetic induction sensor, 507-magnet, 508-tablet.

Detailed ways

In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in use, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that a component is required to be absolutely horizontal or overhang, but rather may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

A vertical standing waist-twisting trainer, comprising a frame body 1, a massage mechanism 4, a counterweight mechanism 5, an adjustable pedal mechanism 3 and a hand-held rotation mechanism 2, the hand-held rotation mechanism is fixedly arranged on the upper part of the frame body , the adjustable pedal mechanism is arranged at the lower part of the frame body, the massage mechanism is arranged between the adjustable pedal mechanism and the hand-held rotating mechanism, the massage mechanism is installed on the frame body, so The counterweight mechanism is installed on the frame body, and the hand-held rotating mechanism is connected with the counterweight mechanism through a rope, so as to convert the gravity of the counterweight in the counterweight mechanism into the rotation resistance of the hand-held rotary mechanism.

In this embodiment, the hand-held rotating mechanism is arranged on the upper part of the frame body, and the adjustable pedal mechanism is arranged at the lower part of the frame body, so that the user can perform training in a standing posture, which is a change from the sitting training of the traditional trainer. The standing training method is more in line with human dynamics, and the training effect is better. According to the different heights of the user, the adjustable pedal mechanism can be used to adjust the height; through the setting of the massage mechanism, it can be filled with no massage in the traditional trainer. The function is blank; the hand-held rotating mechanism is connected with the counterweight mechanism through a rope, so that the gravity of the counterweight in the counterweight mechanism can be converted into the rotation resistance of the hand-held rotating mechanism, so as to achieve the weight-bearing effect during training.

As a further embodiment, the adjustable pedal mechanism includes: a foot pedal, a first link, a second link, and a height adjustment plate, and one ends of the first link and the second link are respectively hinged on the On the frame body, the other ends of the first connecting rod and the second connecting rod are respectively hinged with the foot pedal, the height adjustment plate is fixedly connected with the frame body, and the height adjustment plate is opened along the arc There are a plurality of first adjustment holes, the connecting rods corresponding to the adjustment holes are provided with first latch holes, and the first adjustment holes and the first latch holes are fixed by means of latches.

The following will be described in detail through specific embodiments. As shown in FIG. 2 , the adjustable pedal mechanism 3 includes: a foot pedal 301 , a first link 302 , a second link 303 , and a height adjustment plate 304 . One end of the connecting rod and the second connecting rod are respectively hinged on the support plate of the frame body, and the other ends of the first connecting rod and the second connecting rod are respectively hinged with the bottom bracket of the foot pedal, and the said The height adjustment plate is welded and fixed vertically with the support plate of the frame body, the height adjustment plate is a 1/4 circular steel plate, and four first adjustment holes 305 are opened along the arc on the height adjustment plate. The second connecting rod 303 corresponding to the first adjustment hole is provided with a first pin hole 306 , and the first adjustment hole and the first pin hole are fixed by a pin. The latch can be a spring-type latch for self-locking. The first link and the second link have the same length.

In this embodiment, the height adjustment of the foot pedal relative to the frame body is realized by the hinged connection between the link mechanism and the frame body. The height adjustment with this mechanism can make the overall mechanical structure simple, easy to maintain and repair, and good in durability. .

As a further embodiment, as shown in FIG. 3 , the adjustable pedal mechanism 3 further includes: a gas spring 307 , one end of the gas spring is hinged on the foot pedal, and the other end of the gas spring is hinged on the footrest on the frame.

In this embodiment, by arranging the gas spring between the frame body and the foot pedal, when the height is manually adjusted, the gas spring can bear a certain mechanical resistance and the weight of the foot pedal, so as to make the adjustment easier.

As a further embodiment, the hand-held rotating mechanism includes: a rope reel, the rope reel is installed on the frame for lateral rotation, and a plurality of second adjustment holes are opened on the rope reel along a circular arc. The wheel is coaxially provided with a hand-held handle, the hand-held handle is provided with a second pin hole, the second adjustment hole and the second pin hole are fixed by a pin, the rope reel is fixed with a rope, and the rope The other end is connected with the counterweight mechanism.

4 and 5, the hand-held rotating mechanism 2 includes: a rope reel 201, and the rope reel 201 is rotatably installed on the frame body through the runner support and the bearing. , the rope reel is provided with three second adjustment holes 202 along the arc, the rope reel is coaxially rotatably mounted with a hand-held handle 203, and a bolt fixing plate is welded between the hand-held handles, and the bolt is fixed The board is provided with a second pin hole 204, the second adjustment hole and the second pin hole are fixed by the pin, and the second adjustment hole 202 can be selected according to the training needs. To achieve different twisting starting positions, the circumference of the rope reel is provided with a wire rope connection bracket, the wire rope connection bracket is fixed with a wire rope, and the other end of the wire rope is connected to the counterweight mechanism through a pulley block. the counterweight iron connection. The pulley block is installed on the frame body 1 .

In this embodiment, the rope reel is rotated and installed on the frame body, and the hand-held handle is arranged on the frame body to rotate coaxially with the rope reel, and is connected with the counterweight mechanism through a rope, so as to realize that when the user holds the When the body is twisted by holding the hand-held handle, the rope reel can rotate synchronously with the hand-held handle through the second latch to further stretch the connecting rope, thereby raising the counterweight mechanism.

As a further embodiment, the massage mechanism includes: a massage wheel bracket, a massage wheel, a massage wheel adjustment frame, and an adjustment frame cover, the massage wheel is rotatably mounted on the massage wheel bracket, and the massage wheel adjustment frame is fixedly connected On the massage wheel bracket, a plurality of third adjustment holes are opened on the massage wheel adjustment bracket, the adjustment bracket sleeve is fixed on the frame body, and the adjustment bracket sleeve is provided with third bolt holes, so The massage wheel adjusting frame is slidably matched with the adjusting frame sleeve and is fixed by a bolt through the third adjusting hole and the third bolt hole.

6 and 7, the massage mechanism includes 4: a massage wheel bracket 402, a massage wheel 401, a massage wheel adjustment frame 403, and an adjustment frame cover 404, and the massage wheel passes through a bearing It is rotatably mounted on the massage wheel bracket, the massage wheel adjustment frame is welded to the middle of the beam of the massage wheel bracket and is perpendicular to it, and a plurality of third adjustment holes 406 are laterally opened on the massage wheel adjustment frame. The sleeve is welded on the frame body 1 in the front and rear directions, and the adjustment frame sleeve is provided with a third pin hole 405. The massage wheel adjustment frame is slidably matched with the adjustment frame sleeve and uses a pin to pass through the third adjustment hole and the third pin hole. to be fixed. The latch can be a spring-type latch.

In this embodiment, the rotating connection between the massage wheel and the massage wheel bracket enables the user to touch the massage wheel and rotate together while twisting the waist, so as to achieve the purpose of massage. Fore and aft adjustment.

As a further embodiment, the counterweight mechanism includes: a counterweight stand, a counterweight iron, a counterweight iron guide rod, a selection pin, and a counterweight iron support rod, and the counterweight iron has a plurality of sets and sleeves. On the counterweight iron guide rod and the counterweight iron support rod, the counterweight iron is provided with a fourth pin hole, and the counterweight iron support rod is provided with a corresponding fourth pin hole There are a plurality of fifth plug holes, the selection plug is fixed with the fourth plug hole and the fifth plug hole, one end of the iron supporting rod is fixed with the rope, and the selection plug is a magnetic plug.

The following is a detailed description through specific embodiments. As shown in FIG. 8 , the counterweight mechanism 5 includes: a counterweight stand 501 , a counterweight iron 503 , a counterweight iron guide rod 502 , a selection pin 505 , and a counterweight iron support Rod 504, the counterweight iron has a plurality of stacks arranged and sleeved on the counterweight iron guide rod and the counterweight iron support rod, and the counterweight iron support rod is arranged on the two counterweight iron support rods. Between the heavy iron guide rods, the counterweight iron is provided with a fourth pin hole, the counterweight iron support rod is provided with a plurality of fifth pin holes corresponding to the fourth pin holes, and the selection pin 505 The steel wire rope is fixedly connected to one end of the counterweight iron supporting rod, and the selection plug is a magnetic plug in cooperation with the fourth plug hole and the fifth plug hole.

In this embodiment, by setting the selection pin to be magnetic, it can be ensured that the selection pin is not easy to fall off, so as to improve the safety during movement.

As a further embodiment, as shown in Figures 1 and 8, it also includes a magnet 507 and a tablet computer 508. The magnet is fixed on the uppermost counterweight iron, and the magnet can be a button-type permanent magnet with a small magnetic field range. A magnet, a magnetic induction sensor 506 is fixed on the counterweight stand, the tablet computer is fixedly installed on the counterweight stand, and the magnetic induction sensor is electrically connected to the tablet computer. When the user twists his waist once, the corresponding counterweight will reciprocate up and down once, and the corresponding magnet 507 will pass through the magnetic induction sensor 506 twice. At this time, the magnetic induction sensor will generate two pulse current signals, which are transmitted to the Tablet computer, through the preset program, the tablet computer shows the waist twist once, and the user can be trained through the preset program and pre-stored training information (including video information, sound information, text information, picture information, etc.) .

In this embodiment, a permanent magnet is arranged on the uppermost counterweight iron, and a magnetic induction sensor is fixedly arranged on the counterweight stand, so as to count the number of twisting movements; by installing a tablet computer on the counterweight stand, Corresponding training information can be preset in the tablet computer to implement training guidance for the user during exercise, and by connecting the magnetic induction sensor to the tablet computer, the number of exercises can be displayed on the tablet computer.

The above-mentioned embodiments are preferred examples for realizing the present invention, and the present invention is not limited to the above-mentioned embodiments. Any non-essential additions and substitutions made by those skilled in the art according to the technical features of the technical solutions of the present invention fall within the protection scope of the present invention.

Claims (7)

1. A vertical standing waist-twisting training device is characterized in that, comprising a frame body, a massage mechanism, a counterweight mechanism, an adjustable pedal mechanism and a hand-held rotating mechanism, and the hand-held rotating mechanism is fixedly arranged on the side of the frame body. the upper part, the adjustable pedal mechanism is arranged on the lower part of the frame body, the massage mechanism is arranged between the adjustable pedal mechanism and the hand-held rotating mechanism, and the massage mechanism is installed on the frame body, The counterweight mechanism is installed on the frame body, and the hand-held rotating mechanism is connected with the counterweight mechanism through a rope, so as to convert the gravity of the counterweight in the counterweight mechanism into the rotation resistance of the hand-held rotary mechanism . 2 . The vertical standing waist twisting trainer according to claim 1 , wherein the adjustable pedal mechanism comprises: a foot pedal, a first connecting rod, a second connecting rod, and a height adjusting plate, 2 . One end of the first link and the second link are respectively hinged on the frame body, the other ends of the first link and the second link are respectively hinged with the foot pedal, the height adjustment plate It is fixedly connected with the frame body, the height adjustment plate is provided with a plurality of first adjustment holes along the arc, and the connecting rod corresponding to the first adjustment holes is provided with a first pin hole, the first adjustment The hole and the first pin hole are fixed by the pin. 3 . The vertical standing twist waist trainer according to claim 2 , further comprising: a gas spring, one end of the gas spring is hinged on the footrest, and the end of the gas spring is hinged. The other end is hinged on the frame body. 4 . The vertical standing waist twisting exerciser according to claim 1 , wherein the hand-held rotating mechanism comprises: a rope reel, the rope reel is installed on the frame body by lateral rotation, and the rope The wheel is provided with a plurality of second adjustment holes along the arc, the rope reel is coaxially provided with a hand-held handle, the hand-held handle is provided with a second pin hole, and the second adjustment hole and the second pin hole pass through The latch is matched and fixed, a rope is fixed on the rope reel, and the other end of the rope is connected with the counterweight mechanism. 5 . The vertical standing waist-twisting trainer according to claim 1 , wherein the massage mechanism comprises: a massage wheel bracket, a massage wheel, a massage wheel adjustment frame, and an adjustment frame cover, and the massage wheel It is rotatably installed on the massage wheel bracket, the massage wheel adjustment frame is fixed on the massage wheel bracket, a plurality of third adjustment holes are opened on the massage wheel adjustment frame, and the adjustment frame sleeve is fixed on the massage wheel bracket. On the frame body, the adjusting frame sleeve is provided with a third pin hole, and the massage wheel adjusting frame is slidably matched with the adjusting frame sleeve and is fixed by a pin through the third adjusting hole and the third pin hole. 6 . The vertical standing waist-twisting training device according to claim 1 , wherein the counterweight mechanism comprises: a counterweight stand, a counterweight iron, a counterweight iron guide rod, a selection latch, a counterweight A heavy iron supporting rod, the counterweight iron has a plurality of sets and is sleeved on the counterweight iron guide rod and the counterweight iron supporting rod, and a fourth bolt hole is opened on the counterweight iron , the counterweight iron support rod is provided with a plurality of fifth pin holes corresponding to the fourth pin holes, the selection pin is fixed with the fourth pin hole and the fifth pin hole, and the counterweight iron supports One end of the rod is fixed with the rope, and the selection pin is a magnetic pin. 7 . The vertical standing waist-twisting training device according to claim 6 , further comprising a magnet and a tablet computer, wherein the magnet is fixedly arranged on the uppermost counterweight iron, and the counterweight is vertically oriented. 8 . A magnetic induction sensor is fixed on the frame, the tablet computer is fixedly installed on the counterweight stand, and the magnetic induction sensor is electrically connected with the tablet computer.

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