CN107773908B

CN107773908B - Kettle bell

Info

Publication number: CN107773908B
Application number: CN201711167954.1A
Authority: CN
Inventors: 刘文晖
Original assignee: Shenzhen Fitcare Electronics Co ltd
Current assignee: Shenzhen Fitcare Electronics Co ltd
Priority date: 2017-11-21
Filing date: 2017-11-21
Publication date: 2024-04-30
Anticipated expiration: 2037-11-21
Also published as: CN107773908A

Abstract

The invention discloses a kettle bell, which comprises a body, a base and a counterweight group, wherein the body comprises a shell and a rotating shaft mechanism; the upper end of the rotating shaft is arranged at the upper part of the inner cavity of the shell, and the lower end of the shell is opened; the base comprises a shell, a rotating shaft driving mechanism and a control circuit; the counterweight group comprises a plurality of stacked disc-shaped counterweight blocks, the counterweight group and the shell are located above the base, and the shell covers the outside of the counterweight group; the middle part of the balancing weight comprises a rotating shaft hole, the rotating shaft hole comprises a middle hole and a fan-shaped hole arranged at the periphery of the middle hole, and the central angle of the fan-shaped hole of the balancing weight below is larger than that of the fan-shaped hole of the balancing weight above; the pivot includes the lifting block the same, along the separately arranged of axial with balancing weight quantity, and when the lower extreme of pivot passed the pivot hole of balancing weight and be connected with pivot actuating mechanism, the lifting block is located the below of corresponding balancing weight fan-shaped hole. According to the invention, the number of the balancing weights carried by the body is selected by rotating the rotating shaft, the weight adjustment operation is simple and convenient, fingers are not injured by smashing, and the safety performance is good.

Description

Kettle bell

[ Technical field ]

The invention relates to body-building equipment, in particular to a kettle bell.

[ Background Art ]

When the kettle bell is used for body building, various exercises such as pushing, lifting, throwing, squatting and jumping can be performed. The difference between the kettlebell training and the dumbbell and barbell training is that the kettlebell is more effective for comprehensively improving the whole explosive force. Kettles are generally made of cast iron, most kettles are all iron kettles with fixed weight, and the kettles respectively have the specifications of 10 kg, 15 kg, 20 kg, 25 kg, 30 kg, 50 kg and the like according to the weight, and the kettles have the defect of single weight and cannot meet the preference of different people. A few kettles are manually replaced by iron handles to add and subtract weight, so that the weight suitable for an exerciser can be adjusted. However, the electric-powered electric exercise machine has no automatic counting function, cannot calculate the heat consumption of a human body to achieve the purpose of scientific exercise, is not simple and convenient to operate, has long iron handle replacing time, is easy to smash fingers to cause safety accidents, and cannot adapt to public fitness places.

[ Summary of the invention ]

The technical problem to be solved by the invention is to provide a kettle bell which is convenient for adjusting weight and has good safety.

In order to solve the technical problems, the technical scheme adopted by the invention is that the kettle bell comprises a body, a base and a counterweight group, wherein the body comprises a shell with a handle at the upper end and a rotating shaft mechanism; the rotating shaft mechanism comprises a rotating shaft, the upper end of the rotating shaft is arranged at the upper part of the inner cavity of the shell, and the lower end of the shell is opened; the base comprises a shell, a rotating shaft driving mechanism and a control circuit; the counterweight group comprises a plurality of stacked disc-shaped counterweight blocks, the counterweight group and the shell are located above the base, and the shell covers the outside of the counterweight group; the middle part of the balancing weight comprises a rotating shaft hole, the rotating shaft hole comprises a middle hole and a fan-shaped hole arranged at the periphery of the middle hole, and the central angle of the fan-shaped hole of the balancing weight below is larger than that of the fan-shaped hole of the balancing weight above; the rotating shaft comprises lifting blocks with the same number as the balancing weights, and the lifting blocks are arranged separately along the axial direction of the rotating shaft; when the lower end of the rotating shaft penetrates through the rotating shaft hole of the balancing weight and is connected with the rotating shaft driving mechanism, the lifting block is located below the fan-shaped hole of the corresponding balancing weight.

The kettle bell comprises a main body, wherein the main body comprises a locking mechanism, the locking mechanism comprises a strip-shaped locking plate, a locking fluted disc, a connecting rod, a pressure spring, a spring seat and a rotating shaft mechanism comprise rolling bearings; the rotating shaft is a hollow shaft, the shaft hole is formed along the axis, and the lower part of the shaft hole comprises a pressure spring bearing hole; the connecting rod passes through the shaft hole of the rotating shaft, the spring seat arranged in the pressure spring bearing hole is fixed at the lower end of the rotating shaft, and the middle part of the locking plate is connected with the upper end of the rotating shaft; the pressure spring is arranged in the pressure spring bearing hole and sleeved at the lower end of the connecting rod, the upper end of the pressure spring is propped against the bottom surface of the pressure spring bearing hole, and the lower end of the pressure spring is propped against the spring seat; the locking fluted disc and the outer ring of the rolling bearing are fixed at the top of the inner cavity of the shell, and the inner periphery of the locking fluted disc comprises a circle of inner teeth; the upper end of the rotating shaft is fixed in the inner ring of the rolling bearing, the upper part of the rotating shaft comprises a transverse through groove, and the middle part of the locking plate is arranged in the transverse through groove and is matched with the transverse through groove in an up-down sliding manner; the two ends of the locking plate extending out of the transverse through groove comprise external teeth matched with the locking fluted disc, and when the pressure spring pulls down the connecting rod, the external teeth at the two ends of the locking plate are embedded into the internal teeth of the locking fluted disc; the lower end of the shaft hole comprises a non-round hole connected with the rotating shaft driving mechanism, and the non-round hole is matched with a driving shaft of the rotating shaft driving mechanism.

The kettle bell comprises a base and a positioning gear plate, wherein the base comprises a positioning gear plate, the positioning gear plate comprises a spline hole, and the positioning gear plate is fixed on a top plate of the base; the rotating shaft driving mechanism comprises a power supply, a speed reducing motor and a driving shaft, the speed reducing motor is fixed in the shell of the base, the output shaft of the speed reducing motor is vertically upwards arranged, the driving shaft is square, and the driving shaft is fixed on the output shaft of the speed reducing motor; the lower end of the rotating shaft comprises a flange, and the flange comprises an external spline matched with the spline hole; the non-round hole at the lower end of the shaft hole is a square hole, and when the square hole of the rotating shaft is sleeved on the driving shaft, the flange at the lower end of the rotating shaft penetrates through the spline hole and enters the lower part of the positioning fluted disc.

The kettle bell comprises a control circuit, a motor drive circuit and a speed reducing motor, wherein the control circuit comprises a first microcontroller, a drive shaft position detection circuit and a motor drive circuit; the output end of the driving shaft position detection circuit is connected with the microcontroller.

The kettle bell, the rotary shaft driving mechanism comprises a motor fixing plate, and the driving shaft position detection circuit comprises a plurality of photoelectric switches and a shading turntable; the motor fixing plate is arranged in the shell, and the speed reducing motor is arranged below the motor fixing plate; the shading turntable is fixed on the driving shaft, and the edge of the shading turntable comprises a light-transmitting notch; the photoelectric switch is fixed above the motor fixing plate and is arranged along the circumferential direction of the shading turntable in a separated mode; the signal output end of the photoelectric switch is connected with the first microcontroller.

The kettle bell comprises a power supply, a control circuit and a control circuit, wherein the power supply comprises a rechargeable battery, a charging circuit, a motor current detection circuit, a battery electric quantity detection circuit and a USB interface; the control circuit comprises a display screen, a plurality of setting keys and a travel switch, the travel switch is arranged on a top plate of the base, and the output end of the motor current detection circuit, the output end of the battery electric quantity detection circuit, the signal input end of the display screen, the signal output end of the setting keys and the signal output end of the travel switch are respectively connected with the microcontroller; the display screen and the plurality of setting keys are arranged on a panel on the side surface of the shell.

The kettle bell comprises a control circuit, a control circuit and a control circuit, wherein the control circuit comprises a first RF antenna, a motion sensing component and a second RF antenna, the motion sensing component is arranged on a shell of the body and comprises a second microcontroller, a second RF antenna and an acceleration sensor, and the second RF antenna and the acceleration sensor are respectively connected with the second microcontroller; the first RF antenna is connected with the first microcontroller; the first microcontroller is in wireless connection with the motion sensing component through the first RF antenna, the motion sensing component sends motion data of the body to the first microcontroller, the motion sensing component is connected with the Bluetooth of the smart phone, and the motion data and/or weight data of the body are sent to the smart phone.

The kettle bell comprises a shell, wherein the side wall of the inner cavity of the shell comprises two vertically arranged protruding edges, the periphery of the balancing weight comprises two grooves, and the grooves are matched with the protruding edges; the bottom surface of the balancing weight comprises a plurality of positioning holes, and the top surfaces of the second balancing weight and the lower balancing weight and the top surface of the base respectively comprise a plurality of positioning protrusions which are matched with the positioning holes; the rotating shaft hole of the balancing weight is a stepped hole, and the large hole of the stepped hole is positioned at the lower part of the stepped hole; the radius of the large hole of the stepped hole is larger than or equal to that of the fan-shaped hole; when the lower end of the rotating shaft penetrates through the rotating shaft hole of the balancing weight and is connected with the rotating shaft driving mechanism, the lifting block enters into the large hole of the corresponding balancing weight stepped hole.

The kettle bell, two grooves on the periphery of the balancing weight are positioned at two radial ends of the balancing weight, the number of the balancing weight is 5, and the rotating shaft comprises 5 lifting blocks; the lifting block comprises two protruding blocks, and the two protruding blocks are positioned at two radial ends of the rotating shaft; the balancing weight comprises two fan-shaped holes, and the two fan-shaped holes are symmetrical relative to the center of the rotating shaft hole; the central angle of the first balancing weight fan-shaped hole is 30 degrees from top to bottom, the central angle of the second balancing weight fan-shaped hole is 60 degrees, the central angle of the third balancing weight fan-shaped hole is 90 degrees, the central angle of the fourth balancing weight fan-shaped hole is 120 degrees, and the central angle of the fifth balancing weight fan-shaped hole is 150 degrees; from top to bottom, the starting ends of all the balancing weight fan-shaped holes are at the same vertical position, and the central angle corresponding to the convex block is not larger than that of the first balancing weight fan-shaped hole.

The kettle bell, the edge of the shading rotary disc comprises two notches, and the two notches are arranged at two radial ends of the shading rotary disc; the number of the photoelectric switches is 6, and the central angles corresponding to two adjacent photoelectric switches are 30 degrees; the first notch is an initial position when being positioned at the first photoelectric switch position; when the driving shaft drives the shading turntable to enable the first notch to be far away from the photoelectric switch by 30 degrees, the second notch sequentially enters the positions of the other 5 photoelectric switches, and the corresponding photoelectric switch is triggered to send signals to the first microcontroller.

The kettle bell of the invention selects the number of the balancing weights carried by the body by rotating the rotating shaft, has simple and convenient weight adjustment operation, can not injure fingers by smashing, and has good safety performance.

[ Description of the drawings ]

The invention will be described in further detail with reference to the drawings and the detailed description.

Fig. 1 is a front view of a kettle bell according to an embodiment of the present invention.

Fig. 2 is a top view of an embodiment of the present invention.

Fig. 3 is a sectional view taken along the direction a in fig. 1.

Fig. 4 is a cross-sectional view in the direction B of fig. 2.

Fig. 5 is a front view of the spindle mechanism and locking mechanism of an embodiment of the present invention.

Fig. 6 is a left side view of the spindle mechanism and locking mechanism of an embodiment of the present invention.

Fig. 7 is a top view of a spindle mechanism and locking mechanism according to an embodiment of the present invention.

Fig. 8 is a bottom view of the spindle mechanism and locking mechanism of an embodiment of the present invention.

Fig. 9 is a cross-sectional view taken along direction C in fig. 6.

Fig. 10 is a perspective view of a spindle mechanism and a locking mechanism according to an embodiment of the present invention.

Fig. 11 is a perspective view of a base of an embodiment of the present invention.

Fig. 12 is a top view of a base of an embodiment of the present invention.

Fig. 13 is a D-direction sectional view in fig. 12.

Fig. 14 is an E-direction cross-sectional view in fig. 13.

Fig. 15 is a top view of a spindle drive according to an embodiment of the present invention.

Fig. 16 is a cross-sectional view in the F direction in fig. 15.

Fig. 17 is a cross-sectional view taken along the direction G in fig. 15.

Fig. 18 is a perspective view of a drive shaft position detection circuit arrangement of an embodiment of the present invention.

Fig. 19 is a perspective view of a first weight according to an embodiment of the present invention.

FIG. 20 is a top view of a first weight according to an embodiment of the present invention.

Figure 21 is a bottom view of a first weight according to an embodiment of the present invention.

Fig. 22 is an I-directional cross-sectional view in fig. 20.

Fig. 23 is a cross-sectional view H in fig. 20.

Figure 24 is a perspective view of a second weight according to an embodiment of the present invention.

FIG. 25 is a top view of a second weight according to an embodiment of the present invention.

Fig. 26 is a J-direction cross-sectional view in fig. 25.

Fig. 27 is a cross-sectional view taken along the direction K in fig. 25.

Fig. 28 is a perspective view of a housing according to an embodiment of the present invention.

Fig. 29 is a perspective view of the body and counterweight of an embodiment of the invention.

FIG. 30 is a perspective view of a spindle mechanism and counterweight combination according to an embodiment of the invention.

Fig. 31 is a functional block diagram of a control circuit according to an embodiment of the present invention.

Detailed description of the preferred embodiments

The structure of the kettle bell according to the embodiment of the invention is shown in fig. 1 to 31, and the kettle bell comprises a body 100, a base 200 and a matching unit between the body 100 and the base 200.

As shown in fig. 1 to 4, the body 100 includes a housing 1 having a handle 101 at an upper end thereof, a rotation shaft mechanism, and a locking mechanism.

As shown in fig. 28, the lower end of the housing 1 is opened, two vertically arranged ribs 102 are arranged on the side wall of the inner cavity of the housing 1, and the two ribs 102 are arranged along the two ends of the radial direction of the housing.

The rotating shaft mechanism comprises a rotating shaft 2, a rolling bearing 10 and a pressing plate 11, wherein the upper end of the rotating shaft 2 is arranged at the upper part of the inner cavity of the shell 1 through the rolling bearing 10.

The rotating shaft 2 is a hollow shaft, a shaft hole 201 is arranged along the axis direction, a pressure spring bearing hole 202 is arranged at the lower part of the shaft hole 201, a square hole 203 connected with the rotating shaft driving mechanism is arranged at the lower end of the shaft hole 201, and the square hole 203 is matched with a square driving shaft 21 of the rotating shaft driving mechanism.

As shown in fig. 7 and 9, the upper end of the rotating shaft 2 is fixed in the inner ring of the rolling bearing 10 by a pressing plate 11 and 4 screws 12.

The lower end of the rotating shaft 2 is provided with a circle of flange, and the flange is provided with an external spline 204.

As shown in fig. 5, 6 and 10, the outer surface of the rotating shaft 2 is provided with 5 groups of lifting blocks, and the 5 groups of lifting blocks are arranged separately along the axial direction of the rotating shaft 2. Each group of lifting blocks comprises two convex blocks 205, the two convex blocks 205 are positioned at two radial ends of the rotating shaft 2, the convex blocks 205 are sector-shaped, and the corresponding central angle is slightly smaller than 30 degrees.

As shown in fig. 8 and 9, the locking mechanism comprises a bar-shaped locking plate 13, a locking fluted disc 14, a connecting rod 15, a pressure spring 16, a spring seat 17 and the connecting rod 15 pass through a shaft hole 201 of the rotating shaft 2, the spring seat 17 arranged in the pressure spring bearing hole 202 is fixed at the lower end of the rotating shaft 2 by a screw 18, and the middle part of the locking plate 13 is connected with the upper end of the rotating shaft 2 by a screw. The compression spring 16 is arranged in the compression spring bearing hole 202 and sleeved at the lower end of the connecting rod 15, the upper end of the compression spring 16 abuts against the bottom surface of the compression spring bearing hole 202, and the lower end of the compression spring abuts against the spring seat 17.

The locking fluted disc 14 is fixed on the top of the inner cavity of the shell 1 by a screw, and simultaneously, the outer ring of the rolling bearing 10 is also fixed on the top of the inner cavity of the shell 1. The locking tooth plate 14 has a ring of internal teeth on its inner periphery.

As shown in fig. 4 and 9, the upper portion of the rotating shaft 2 has a transverse through slot 206, and the middle portion of the locking plate 13 is disposed in the transverse through slot 206 and slidably engages with the transverse through slot 206 up and down. The two ends of the locking plate 13 extending out of the transverse through groove 206 comprise external teeth matched with the locking fluted disc 14, and when the pressure spring 16 pulls down the connecting rod 15, the external teeth at the two ends of the locking plate 13 are embedded into the internal teeth of the locking fluted disc 14.

The base 200 includes a housing 9, a spindle drive mechanism, a positioning toothed disc 18, and a control circuit.

The middle part of the positioning fluted disc 18 is provided with a spline hole, and the spline hole of the positioning fluted disc 18 is matched with the external spline 204 at the lower end of the rotating shaft 2.

The spindle drive mechanism includes a power source, a reduction motor 19, a motor fixing plate 20, and a drive shaft 21, the motor fixing plate 20 is installed in the housing 9, and the reduction motor 19 is installed below the motor fixing plate 20. The output shaft 1901 of the speed reducing motor 19 is vertically upwards arranged, the driving shaft 21 is square, the driving shaft 21 is tightly sleeved on the output shaft 1901 of the speed reducing motor 19, and the spline hole of the positioning fluted disc 18 is coaxial with the driving shaft 21.

When the square hole 203 of the rotating shaft 2 is sleeved on the driving shaft 21, the flange at the lower end of the rotating shaft 2 passes through the spline hole and enters the lower part of the positioning fluted disc 18.

As shown in fig. 31, the control circuit includes a first microcontroller, a drive shaft position detection circuit, a motor drive circuit, a first RF antenna, a display screen, three setup keys, a travel switch, and a motion sensing assembly.

The input end of the motor driving circuit is connected with a power supply, the output end of the motor driving circuit is connected with a speed reducing motor 19, and the control end of the motor driving circuit is connected with a first microcontroller. The output end of the driving shaft position detection circuit is connected with the microcontroller.

The drive shaft position detection circuit includes 6 photoelectric switches 23 and a light shielding dial 8. The shading turntable 8 is fixed at the lower part of the driving shaft 21 by a screw, two light-transmitting notches 801 are arranged on the edge, and the two notches 801 are arranged at two ends of the shading turntable 8 in the diameter direction.

The photoelectric switch 24 is fixed to a photoelectric switch mounting bracket 25 above the motor fixing plate 20, and is arranged apart in the circumferential direction of the light shielding turntable 8. The signal output of the opto-electronic switch 24 is terminated to the first microcontroller.

The corresponding central angle of two adjacent photoelectric switches is 30 degrees. The first notch 801 is in the initial position when it is in the first opto-electronic switch position. When the driving shaft 21 drives the shading turntable 8 to enable the first notch 801 to be far away from the photoelectric switch by 30 degrees, the second notch 801 sequentially enters the positions of the other 5 photoelectric switches, and the corresponding photoelectric switch is triggered to send a signal to the first microcontroller.

The power supply comprises a rechargeable battery, a charging circuit, a motor current detection circuit, a battery electric quantity detection circuit and a USB interface.

The rechargeable battery is connected with the charging circuit, and the charging circuit is connected with the USB interface. The output end of the motor current detection circuit, the output end of the battery electric quantity detection circuit, the signal input end of the display screen, the signal output end of the set key and the signal output end of the travel switch are respectively connected with the microcontroller. The display screen 26 and the 3 setting keys 27 are mounted on a panel 901 on the side of the housing 9.

The base can be used while being charged, and the purpose of the rechargeable battery is to normally use under the condition of power failure or no commercial power. In order to prevent misoperation, after detecting that the kettle-bell main body is placed on the base, the weight of the required kettle-bell main body can be set through "+" and "-" keys, and the required kettle-bell main body is displayed on a display screen. And then the direct current speed reducing motor is commanded to rotate through an OK button, so that the rotating shaft on the kettle bell main body is driven to rotate. Several groups of photoelectric switches are used for detecting the position of the motor, and the first microcontroller stops rotating the motor after detecting that the rotating shaft reaches the designated position. After lifting the main body of the kettle bell, the rotating shaft on the main body can clamp the needed balancing weight, thereby obtaining the weight of the corresponding kettle bell body.

The motor current of the control circuit is monitored, so that the motor can be prevented from being continuously driven after being blocked under abnormal conditions, and the risk of burning out the motor is caused; the battery power of the control circuit is monitored, and the risk that the motor stops when the battery power is insufficient can be prevented.

As shown in fig. 4 and 11, the travel switch 28 is mounted on the top plate positioning hole 707 of the base 200, and the travel switch 28 is a tact switch for detecting whether the kettle bell body is placed on the base or has been lifted, and the kettle bell body is placed on the base, and the tact switch is closed; the kettle bell is lifted, and the tact switch is opened.

As shown in fig. 4 and 31, the motion sensing assembly 29 is mounted on a side wall of the housing 1 of the body 100, and includes a second microcontroller, a second RF antenna, and an acceleration sensor, which are connected to the second microcontroller, respectively.

The first RF antenna is connected with the first microcontroller, the first microcontroller is in wireless connection with the motion sensing assembly through the first RF antenna, the motion sensing assembly sends motion data of the body 100 to the first microcontroller, the first microcontroller is connected with the smart phone Bluetooth through the first RF antenna, and the motion data and/or weight data of the body 100 are sent to the smart phone.

The motion sensing component is fixed on the kettle bell main body, the second microcontroller can monitor the motion posture of the main body through data transmitted back by the acceleration sensor, the motion data are transmitted to the base through a 2.4GHz RF signal, and the base transmits the motion data, the weight and other data of the kettle bell main body to the mobile phone connected with the motion data through a BLE (Bluetooth low power consumption) mode, so that the motion data can be displayed on the APP. Automatic counting, without the need of users to pay out energy to count, and avoiding counting errors.

The counterweight group comprises 5 stacked, disc-shaped counterweights 7, the counterweight group and the housing 1 are located above the base 200, the housing 1 being covered outside the counterweight group.

As shown in fig. 19 to 27, the periphery of the weight 7 includes two grooves 706, the two grooves 706 of the periphery of the weight 7 are located at two radial ends of the weight 7, and the grooves 706 are matched with the two ridges 102 on the housing 1.

The bottom surface of balancing weight 7 has two locating hole 707 of symmetrical arrangement, and the top surface of second piece through fifth balancing weight has two location arch 702 respectively, and the top surface of base casing 9 has two location arch 902, and location arch 702 and 902 and locating hole 707 adaptation are in order to guarantee that balancing weight 7 when folding, upper and lower balancing weight 7 keeps same angle, and keeps definite angle with base casing 9.

The middle part of the balancing weight 7 is provided with a rotating shaft hole 701, the rotating shaft hole 701 is a stepped hole, and a small hole of the stepped hole is positioned at the upper part of the stepped hole and comprises a middle hole 703 and two fan-shaped holes 704 which are positioned at the periphery of the middle hole 703 and are symmetrical relative to the center of the middle hole 703. The large hole 705 of the stepped hole is positioned at the lower part of the stepped hole, and the radius of the large hole 705 of the stepped hole is larger than or equal to the radius of the sector hole 704.

The central angle of the fan-shaped hole 704 of the counterweight 7 below is larger than that of the fan-shaped hole 704 of the counterweight 7 above. When the lower end of the rotating shaft 2 passes through the rotating shaft hole 701 of the balancing weight 7 and is connected with the rotating shaft driving mechanism, the lifting block is lower than the fan-shaped hole 704 of the corresponding balancing weight 7 and is positioned below the corresponding balancing weight 7.

When the lower end of the rotating shaft 2 passes through the rotating shaft hole 701 of the balancing weight 7 and is connected with the rotating shaft driving mechanism, the lifting block enters into a large hole corresponding to the stepped hole of the balancing weight 7.

As shown in fig. 19 to 27, from top to bottom, the central angle α of the fan-shaped hole 704 of the first balancing weight 7-1 is 30 °, and the central angle corresponding to the bump 205 of the rotating shaft 2 is slightly smaller than the central angle of the fan-shaped hole 704 of the first balancing weight 7-1, so that the bump 205 on the top can smoothly pass through the fan-shaped hole 704 of the first balancing weight 7-1. The central angle α of the second 7-2 fan-shaped hole 704 is 60 °, the central angle α of the third 7-3 fan-shaped hole 704 is 90 °, the central angle α of the fourth 7-4 fan-shaped hole 704 is 120 °, and the central angle α of the fifth 7-5 fan-shaped hole 704 is 150 ° (the structure of the third to fifth weights are not shown). From top to bottom, the initial ends of the fan-shaped holes 704 of all the balancing weights 7 are at the same vertical position, and the central angle corresponding to the convex blocks 205 of the rotating shaft 2 is slightly smaller than that of the fan-shaped holes 704 of the first balancing weight 7-1.

Three keys on the base panel are respectively "+", "-", and "OK" keys, and are connected with the microprocessor on the base; setting the weight of the weight by using "+", "-" keys, and displaying the set weight on a display screen intuitively by the microprocessor; after the weight is set, pressing an OK key, the main control unit controls the direct current speed reduction motor to rotate, the motor drives the rotating shaft on the kettle bell body to rotate, and the shading turntable on the driving shaft and the rotating shaft synchronously rotate; when the shading part of the shading rotary disk rotates to a certain photoelectric switch position, the corresponding photoelectric switch is disconnected, and when the notch part of the shading rotary disk rotates to a certain photoelectric switch position, the corresponding photoelectric switch is conducted; the microcontroller judges whether the rotating shaft rotates to the corresponding discus combination position or not through the on or off states of the photoelectric switches, then stops rotating, and simultaneously displays the rotating pattern on the display screen; when the kettle bell is lifted, the balancing weight with corresponding weight is hung on the rotating shaft of the kettle bell body, so that the kettle bell body obtains the set weight.

The weight of kettle-bell body is 15 pounds, and the weight of every balancing weight is 5 pounds, and every increase one balancing weight, the weight of kettle-bell body increases 5 pounds, so the weight level that the display screen shows the button selection has 6 grades, is respectively: 15 lbs, 20 lbs, 25 lbs, 30 lbs, 35 lbs, 40 lbs.

The kettle bell body is placed on the base again, so that the additional weight can be reset.

The weight adjustment working principle is as follows:

a. Two protruding edges are clamped in the open grooves on two sides of the 5 balancing weights in the outer shell of the kettle bell body, the balancing weights and the outer shell cannot rotate relatively in the circumferential direction, all protruding blocks of the rotating shaft are positioned below fan-shaped holes on two sides of the balancing weights in the initial position, at this time, the kettle bell body is lifted, all the balancing weights are separated from the body, and only the self weight of the body is lifted.

B. Before the kettle bell body is not lifted, the square driving shaft is propped against the spring seat at the lower end of the connecting rod, the spring seat compresses the pressure spring and is propped against the connecting rod, the connecting rod is propped against the locking plate, and the locking plate is separated from the positioning fluted disc. The rotating shaft can rotate in the circumferential direction relative to the body and the balancing weight, so that the weight adjusting function is realized.

C. When the kettle bell body is lifted, the lower end of the rotating shaft is firstly separated from the square driving shaft, the spring seat pulls the connecting rod and the locking plate to move downwards under the action of the pressure spring, the external teeth of the locking plate are clamped into tooth grooves of the positioning fluted disc fixed on the body, and the rotating shaft is blocked relative to the body and cannot rotate.

D. After the kettle bell body is placed on the base, the required counterweight can be selected. When 15 pounds are selected on the key and an OK key is pressed, the microcontroller controls the motor to start, and the square driving shaft and the rotating shaft are driven to rotate relative to the base, the shell and the balancing weight. Because the locking plate on the locking mechanism is propped to the upper position and is separated from the positioning fluted disc, the rotating shaft can rotate relative to the shell. The motor rotates the rotating shaft to an initial position, namely a 0-degree position under the action of the control circuit. In the initial position, the positions corresponding to all the lugs on the rotating shaft are the initial positions of the fan-shaped holes of the balancing weights. At this time, the hand-held kettle bell body is pulled down by the connecting rod under the action of the pressure spring because the rotating shaft is disconnected with the square transmission shaft, the outer teeth of the locking plate are clamped on the positioning fluted disc, and the rotating shaft can not rotate any more. The only weight lifted is that the body does not contain the weight, only 15 pounds.

E. when 20 pounds are selected on the key and OK is performed, the microcontroller controls the motor to start, and the square driving shaft and the rotating shaft are driven to rotate by 30 degrees relative to the base, the shell and the balancing weight. Because the central angle of the fan-shaped hole of the uppermost first balancing weight is only 30 degrees, after the rotating shaft rotates for 30 degrees, the uppermost protruding block on the rotating shaft is staggered with the fan-shaped hole of the first balancing weight, and the first balancing weight is clamped. The other 4 balancing weights below the rotating shaft can not be clamped by the convex blocks of the rotating shaft because the fan-shaped hole positions are equal to or larger than 60 degrees; so that the weight of the kettle bell body is 20 pounds when the kettle bell body is held.

When 25 pounds are selected on the key and an OK key is pressed, the motor is started to drive the square transmission shaft and the rotating shaft to rotate 60 degrees relative to the base, the shell and the counter weights, and as the central angle of the fan-shaped holes of the two uppermost counter weights is smaller than 60 degrees, after the rotating shaft rotates by 60 degrees, the two uppermost pairs of lugs on the rotating shaft clamp the uppermost counter weights 7-1 and 7-2; the other 3 balancing weights can not be clamped by the convex blocks of the rotating shaft because the central angles of the fan-shaped holes are all larger than 90 degrees; thus, when the kettle bell is handled, it weighs 25 pounds.

When 30 pounds, 35 pounds or 40 pounds are respectively selected on the keys and an 'OK' key is pressed, the working principle of the weight selection is the same as the above, and the relative rotation angles of the rotating shafts are 90 degrees, 120 degrees and 150 degrees respectively.

The above embodiments of the invention have the following advantages:

1) The weight mode is selected by adopting the keys, the weight adjustment is visual and simple, the defect that the weight of the traditional kettle bell is single and cannot be changed is avoided, and the kettle bell is suitable for wider user groups.

2) The internal tooth positioning device is adopted to ensure that the rotary shaft of the kettle bell can be lifted up after rotating to the corresponding position, thereby avoiding the rotary shaft from being blocked due to accidental lifting of the kettle.

3) By adopting the locking mechanism, the rotary shaft is prevented from rotating after the kettle bell body is lifted up, so that the balancing weight is prevented from accidentally falling off after the body is lifted up to cause safety accidents, and hands are prevented from being polluted.

4) The power supply in the base is internally provided with a lithium battery, and the lithium battery can be normally used under the condition of no external power supply.

5) The sensor is implanted into the kettle bell body and is connected with a control circuit in the Bluetooth log base, and the control circuit can be connected with the APP on the mobile phone through Bluetooth. Thereby calculating the number of lifting cycles and the heat consumed by the human body, and helping scientific exercise.

6) The LCD display screen is adopted to display parameters such as total weight, battery power, bluetooth connection and the like, so that the display is clear at a glance.

The above embodiments of the present invention are only preferred embodiments and are not intended to limit the present invention, and although the foregoing embodiments are described in detail, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should fall within the protection scope of the present invention.

Claims

1. The kettle bell comprises a main body, and is characterized by comprising a base and a counterweight group, wherein the main body comprises a shell with a handle at the upper end and a rotating shaft mechanism; the rotating shaft mechanism comprises a rotating shaft, the upper end of the rotating shaft is arranged at the upper part of the inner cavity of the shell, and the lower end of the shell is opened; the base comprises a shell, a rotating shaft driving mechanism and a control circuit; the counterweight group comprises a plurality of stacked disc-shaped counterweight blocks, the counterweight group and the shell are located above the base, and the shell covers the outside of the counterweight group; the middle part of the balancing weight comprises a rotating shaft hole, the rotating shaft hole comprises a middle hole and a sector hole arranged at the periphery of the middle hole, and the central angle of the sector hole of the balancing weight below is larger than that of the sector hole of the balancing weight above; the rotating shaft comprises lifting blocks with the same number as the balancing weights, and the lifting blocks are arranged separately along the axial direction of the rotating shaft; when the lower end of the rotating shaft penetrates through the rotating shaft hole of the balancing weight and is connected with the rotating shaft driving mechanism, the lifting block is positioned below the fan-shaped hole of the corresponding balancing weight;

The body comprises a locking mechanism, the locking mechanism comprises a strip-shaped locking plate, a locking fluted disc, a connecting rod, a pressure spring, a spring seat and a rolling bearing; the rotating shaft is a hollow shaft, the shaft hole is formed along the axis, and the lower part of the shaft hole comprises a pressure spring bearing hole; the connecting rod passes through the shaft hole of the rotating shaft, the spring seat arranged in the pressure spring bearing hole is fixed at the lower end of the rotating shaft, and the middle part of the locking plate is connected with the upper end of the rotating shaft; the pressure spring is arranged in the pressure spring bearing hole and sleeved at the lower end of the connecting rod, the upper end of the pressure spring is propped against the bottom surface of the pressure spring bearing hole, and the lower end of the pressure spring is propped against the spring seat; the locking fluted disc and the outer ring of the rolling bearing are fixed at the top of the inner cavity of the shell, and the inner periphery of the locking fluted disc comprises a circle of inner teeth; the upper end of the rotating shaft is fixed in the inner ring of the rolling bearing, the upper part of the rotating shaft comprises a transverse through groove, and the middle part of the locking plate is arranged in the transverse through groove and is matched with the transverse through groove in an up-down sliding manner; the two ends of the locking plate extending out of the transverse through groove comprise external teeth matched with the locking fluted disc, and when the pressure spring pulls down the connecting rod, the external teeth at the two ends of the locking plate are embedded into the internal teeth of the locking fluted disc; the lower end of the shaft hole comprises a non-round hole connected with the rotating shaft driving mechanism, and the non-round hole is matched with a driving shaft of the rotating shaft driving mechanism.

2. The kettle bell of claim 1 wherein the base includes a positioning cog, the positioning cog including a splined opening, the positioning cog being secured to a top plate of the base; the rotating shaft driving mechanism comprises a power supply, a speed reducing motor and a driving shaft, the speed reducing motor is fixed in the shell of the base, the output shaft of the speed reducing motor is vertically upwards arranged, the driving shaft is square, and the driving shaft is fixed on the output shaft of the speed reducing motor; the lower end of the rotating shaft comprises a flange, and the flange comprises an external spline matched with the spline hole; the non-round hole at the lower end of the shaft hole is a square hole, and when the square hole of the rotating shaft is sleeved on the driving shaft, the flange at the lower end of the rotating shaft penetrates through the spline hole and enters the lower part of the positioning fluted disc.

3. The kettle bell as claimed in claim 2, wherein the control circuit comprises a first microcontroller, a drive shaft position detection circuit and a motor drive circuit, the motor drive circuit having an input terminal connected to a power source, an output terminal connected to a speed reducing motor, and a control terminal connected to the first microcontroller; the output end of the driving shaft position detection circuit is connected with the first microcontroller.

4. The kettle bell as claimed in claim 3, wherein the shaft drive mechanism comprises a motor mounting plate, and the drive shaft position detection circuit comprises a plurality of photoelectric switches and a light shielding turntable; the motor fixing plate is arranged in the shell, and the speed reducing motor is arranged below the motor fixing plate; the shading turntable is fixed on the driving shaft, and the edge of the shading turntable comprises a light-transmitting notch; the photoelectric switch is fixed above the motor fixing plate and is arranged along the circumferential direction of the shading turntable in a separated mode; the signal output end of the photoelectric switch is connected with the first microcontroller.

5. The kettle bell of claim 3 wherein the power supply comprises a rechargeable battery, a charging circuit, a motor current detection circuit, a battery charge detection circuit, and a USB interface, the rechargeable battery being connected to the USB interface through the charging circuit; the control circuit comprises a display screen, a plurality of setting keys and a travel switch, the travel switch is arranged on a top plate of the base, and the output end of the motor current detection circuit, the output end of the battery electric quantity detection circuit, the signal input end of the display screen, the signal output end of the setting keys and the signal output end of the travel switch are respectively connected with the first microcontroller; the display screen and the plurality of setting keys are arranged on a panel on the side surface of the shell.

6. The kettle bell of claim 3 wherein the control circuit includes a first RF antenna and a motion sensing assembly; the motion sensing component is arranged on the shell of the body and comprises a second microcontroller, a second RF antenna and an acceleration sensor, wherein the second RF antenna and the acceleration sensor are respectively connected with the second microcontroller; the first RF antenna is connected with the first microcontroller; the first microcontroller is in wireless connection with the motion sensing component through the first RF antenna, the motion sensing component sends motion data of the body to the first microcontroller, the first microcontroller is connected with the smart phone Bluetooth, and the motion data and/or weight data of the body are sent to the smart phone.

7. The kettle bell as claimed in claim 1, wherein the side wall of the inner cavity of the housing comprises two vertically arranged ridges, and the periphery of the weight comprises two grooves, said grooves being adapted to said ridges; the bottom surface of the balancing weight comprises a plurality of positioning holes, and the top surfaces of the second balancing weight and the lower balancing weight and the top surface of the base respectively comprise a plurality of positioning protrusions which are matched with the positioning holes; the rotating shaft hole of the balancing weight is a stepped hole, and the large hole of the stepped hole is positioned at the lower part of the stepped hole; the radius of the large hole of the stepped hole is larger than or equal to that of the fan-shaped hole; when the lower end of the rotating shaft penetrates through the rotating shaft hole of the balancing weight and is connected with the rotating shaft driving mechanism, the lifting block enters into the stepped hole large hole of the corresponding balancing weight.

8. The kettle bell as claimed in claim 7, wherein two grooves on the periphery of the weight are located at two radial ends of the weight, the number of weights is 5, and the shaft comprises 5 lifting blocks; the lifting block comprises two protruding blocks, and the two protruding blocks are positioned at two radial ends of the rotating shaft; the balancing weight comprises two fan-shaped holes, and the two fan-shaped holes are symmetrical relative to the center of the rotating shaft hole; the central angle of the fan-shaped hole of the first balancing weight is 30 degrees from top to bottom, the central angle of the fan-shaped hole of the second balancing weight is 60 degrees, the central angle of the fan-shaped hole of the third balancing weight is 90 degrees, the central angle of the fan-shaped hole of the fourth balancing weight is 120 degrees, and the central angle of the fan-shaped hole of the fifth balancing weight is 150 degrees; the starting ends of the fan-shaped holes of all the balancing weights are positioned at the same vertical position from top to bottom, and the central angle corresponding to the convex blocks is not larger than the central angle of the fan-shaped hole of the first balancing weight.

9. The kettle bell as claimed in claim 4, wherein the rim of the shutter disk includes two notches arranged at both radial ends of the shutter disk; the number of the photoelectric switches is 6, and the central angles corresponding to two adjacent photoelectric switches are 30 degrees; the first notch is an initial position when being positioned at the first photoelectric switch position; when the driving shaft drives the shading turntable to enable the first notch to be far away from the photoelectric switch by 30 degrees, the second notch sequentially enters the positions of the other 5 photoelectric switches, and the corresponding photoelectric switch is triggered to send signals to the first microcontroller.