A calf massager that can stretch the feet

Abstract

This utility model provides a calf massager with a stretchable foot, belonging to the technical field of massage and physiotherapy equipment. It solves the technical problems of existing massage chairs, such as the lack of alternating downward pressing and stretching function of the calf, incomplete foot massage, and complex structure. It includes an upper leg frame assembly and a lower leg frame assembly, with a lifting electric push rod hinged between them. A reciprocating drive assembly is located at the lower front end of the lower leg frame assembly, and two vertically swinging footrest massage assemblies are hinged to the reciprocating drive assembly, respectively hinged to the left and right sides of the front of the lower leg frame assembly. The upper leg frame assembly has rear covers on its rear and lower sides, and a calf guard on its upper front side. Foot guard assemblies are located on the outer sides of the footrest massage assemblies. This utility model can satisfy the coordinated work of overall calf stretching, alternating downward pressing of the foot, and full-foot rolling massage. It has a simple structure, controllable cost, and high user comfort.

Description

Technical Field

[0001] This utility model belongs to the technical field of massage and physiotherapy equipment, and relates to a calf massager, particularly a calf massager that can stretch the foot. Background Technology

[0002] With the fast pace of life and increasing work pressure, people often stand or sit for long periods without exercise, frequently experiencing soreness and numbness in their foot muscles. Effective foot massage and stretching can relieve muscle soreness. However, most massage chairs on the market only offer stretching functions for the upper and lower legs, lacking foot instep stretching capabilities, resulting in poor massage effects and low comfort.

[0003] A search revealed that while some existing massage chairs feature foot massage structures, their foot pressing mechanism is mostly a single, simultaneous downward press, failing to achieve alternating stretching between the left and right feet. Furthermore, the foot massage rollers often do not cover the entire sole of the foot. Additionally, traditional structures typically require separate drive motors for the left and right feet, resulting in complex designs, higher costs, and hindering product promotion.

[0004] Based on this, this utility model proposes a calf massager that can stretch the foot, aiming to achieve the synergistic effect of overall calf stretching, alternating foot pressing and full foot rolling massage, improve user comfort in a simple and cost-effective way, and effectively activate the ankle and relax leg muscles. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a calf massager that can stretch the foot. The technical problem to be solved by this utility model is: how to achieve the synergistic effect of overall calf stretching, alternating foot pressing, and full-foot rolling massage, so as to improve user comfort in a simple and cost-effective manner.

[0006] The objective of this utility model can be achieved through the following technical solutions: A calf massager with stretchable feet includes an upper leg frame assembly and a lower leg frame assembly slidably connected to the upper leg frame assembly. A lifting electric push rod is hinged between the upper leg frame assembly and the lower leg frame assembly. A reciprocating drive assembly is provided at the lower front end of the lower leg frame assembly. Two footrest massage assemblies that swing up and down are hinged to the reciprocating drive assembly. The two footrest massage assemblies are respectively hinged to the left and right sides of the front part of the lower leg frame assembly. A rear cover is provided on the rear and lower sides of the upper leg frame assembly. A calf guard is provided on the upper front part of the upper leg frame assembly. Foot guard assemblies are provided on the outer sides of the footrest massage assemblies. The lifting electric push rod is located between the rear cover and the calf guard. The lower leg support assembly includes two symmetrically arranged vertical lifting sliding rods. Two horizontally arranged lower leg support rods are fixed to the lower part of the lifting sliding rods. The reciprocating drive assembly includes a motor housing and a drive shaft. The motor housing is fixed to the middle of the front side of the two lower leg support rods. A drive motor is installed inside the motor housing. The drive shaft is rotatably arranged on the front side of the lower leg support rod. The drive shaft is connected to the output shaft of the drive motor. Eccentric wheels are fixed at both ends of the drive shaft. Drive connecting rods are hinged on the eccentric wheels. Rotary shaft screws are provided at the ends of the drive connecting rods.

[0007] The working principle of this utility model is as follows: The telescopic movement of the lifting electric push rod drives the lower leg frame assembly to slide up and down relative to the upper leg frame assembly, realizing the overall stretching of the calf; the reciprocating drive assembly generates periodic reciprocating power, driving the left and right foot massage assemblies to swing up and down around their hinge points with the lower leg frame assembly, thereby realizing the alternating downward and upward movement of the left and right feet; the two foot massage assemblies can massage the soles of the feet during the swinging process; the rear cover, calf guard, and foot guard assemblies provide protection and support for each component. Through the above coordination, the synergistic effects of calf stretching, alternating foot swinging, and foot massage are achieved; the drive motor provides rotational power, and its output shaft drives the drive shaft to rotate; the eccentric wheels at both ends of the drive shaft rotate synchronously with the drive shaft, and the eccentric structure of the eccentric wheels converts the rotational motion into reciprocating swinging, driving the drive linkage hinged on the eccentric wheels to perform reciprocating push-pull motion; the rotating shaft screw at the end of the drive linkage is used to hinge with the inclined linkage of the foot massage assembly, thereby transmitting the reciprocating motion to the foot massage assembly, realizing the alternating up and down swinging of the left and right footrests. This structure can achieve alternating downward and upward stretching of both feet by a single motor drive.

[0008] The rear cover is L-shaped, and the horizontal section of the rear cover has two symmetrically arranged avoidance holes. The upper leg frame assembly includes a rear guard plate, which is fixed to the front side of the vertical section of the rear cover. The upper leg frame body is fixed to the front side of the rear guard plate. Two symmetrically arranged vertical lifting slide bars are fixed to the inner side of the upper leg frame body. Connecting pivots are fixed to the upper parts of both the left and right sides of the upper leg frame body. Two horizontally arranged mounting rods are fixed to both the left and right sides of the upper leg frame body. A hinge seat is fixed to the upper middle part of the front side of the upper leg frame body. A fixing crossbar is fixed to the middle part of the front side of the upper leg frame body.

[0009] The above structure features an L-shaped rear cover that provides bottom and rear support for the overall structure. A clearance hole in its horizontal section avoids the support wheels of the lower leg support assembly. The upper leg support assembly is fixed to the front of the vertical section of the rear cover via a rear guard plate. A lifting slide rail inside the upper leg support body guides the lifting of the lower leg support assembly. Connecting pivots on both sides of the upper leg support body are used for hinged connection to the massage chair body. A mounting rod secures the calf guard. A hinge seat is used to hinge the upper end of the lifting electric push rod. A fixed crossbar reinforces the support for the calf guard. This structure collectively forms the support frame of the upper leg support, providing the structural foundation for the lifting of the calf section, the installation of the guard, and the overall hinge.

[0010] Two lifting pulleys are provided on the outer side of each lifting sliding rod. The lifting pulleys are slidably arranged inside the lifting sliding groove rod on the same side. Two symmetrically arranged support wheels are fixed at the lower end of the lower leg support rod on the lower side. The support wheels extend out of the avoidance holes on the same side. Four horizontally arranged hinged connecting rods are fixed on the lower leg support rod on the lower side. The ends of the hinged connecting rods are all provided with pivot screws. A second hinge seat is fixed in the middle of the rear side of the lower leg support rod on the lower side. The upper and lower ends of the lifting electric push rod are respectively hinged to the first hinge seat and the second hinge seat.

[0011] With the above structure, the lower leg support assembly is slidably mounted within the lifting slide rail of the upper leg support assembly via lifting pulleys on the outer side of the lifting slide rod, achieving lifting guidance and support. Two lower leg support rods at the bottom of the lifting slide rod provide lateral structural strength. The support wheel at the lower end of the lower leg support rod extends out of the avoidance hole in the rear cover, allowing it to contact the ground or base for auxiliary support when at its lowest position. Four hinged connecting rods fixed to the lower leg support rod and their end pivot screws are used for hinged connection with the diagonal connecting rod of the foot massage assembly. The second hinge seat on the rear side of the lower leg support rod is hinged to the lower end of the lifting electric push rod, and the upper end of the lifting electric push rod is hinged to the first hinge seat of the upper leg support assembly. When the lifting electric push rod extends or retracts, it drives the lower leg support assembly to slide up and down along the lifting slide rail, thereby achieving the lifting and stretching function of the lower leg portion.

[0012] The motor housing is located between two hinged connecting rods in the middle, and a Hall sensor plate is provided on the motor housing.

[0013] With the above structure, the reciprocating drive assembly is fixed to the front middle of the lower leg support rod through the motor cover, located between the two hinged links; the magnet of the output shaft of the drive motor and the Hall sensor plate can identify the initial position posture and the posture of synchronous left and right downward pressing angle, so as to obtain a better massage and stretching experience.

[0014] The foot massage assembly includes a footrest, with two inclined connecting rods fixed to the rear side of the footrest. The upper ends of the two connecting rods are hinged to the pivot screws of two hinged connecting rods on the same side. The middle part of the outer connecting rod is hinged to the pivot screw of a drive connecting rod on the same side. Two foot massage rollers are rotatably mounted on the upper end of the footrest. Synchronous pulleys are mounted on the pivots of the two foot massage rollers. A transmission belt is provided between the two synchronous pulleys. A foot roller motor is fixed on the footrest, and the output shaft of the foot roller motor is connected to the pivot of one of the foot massage rollers.

[0015] Using the above structure, the footrest massage assembly is hinged to the lower leg frame assembly's hinge link via two diagonal connecting rods on the rear side of the footrest. The middle of the outer diagonal connecting rod is also hinged to the drive link of the reciprocating drive assembly. When the drive link is pushed or pulled, it causes the footrest to swing up and down around the pivot screw of the hinge link, achieving alternating downward and upward pressure on the foot. Two foot massage rollers at the upper end of the footrest rotate under the drive of a foot roller motor. The output shaft of the foot roller motor directly drives one of the foot massage rollers to rotate. The synchronous pulley on the roller's shaft drives the other synchronous pulley and the corresponding foot massage roller to rotate synchronously via a transmission belt, thus providing a full-foot massage.

[0016] The lower leg guard is W-shaped and is located on the front side of the upper leg frame body and the fixed crossbar. The lower leg guard covers the four mounting rods and forms two symmetrically arranged lower leg placement cavities. Each lower leg placement cavity has a mounting hole on both the left and right sides. An elastic strap or clamping airbag can be detachably installed between the two mounting holes.

[0017] With the above structure, the calf guard is W-shaped and positioned at the front of the upper leg frame body and the fixed crossbar, covering the four mounting rods for secure fixation to the front of the upper leg frame assembly. The calf guard forms two symmetrical calf placement cavities to accommodate and position the user's calves. Mounting holes on both sides of the calf placement cavities are used to install elastic straps or clamping airbags. The tightening action of the straps or airbags secures the user's calves within the placement cavities, preventing calf displacement during use and providing a comfortable wrapping sensation to ensure massage and stretching effects.

[0018] The foot cover assembly includes an upper foot cover and a lower foot cover located below the upper foot cover. The upper part of the upper foot cover forms a foot placement cavity, which is located below the lower leg placement cavity on the same side. The bottom of the foot placement cavity is provided with a clearance hole, and the foot massage roller extends out of the clearance hole on the same side. Mounting holes 2 are provided on both the left and right sides of the foot placement cavity, and an elastic strap or clamping airbag is detachably installed between the two mounting holes 2.

[0019] Using the above structure, the foot protector assembly consists of an upper foot protector and a lower foot protector. The upper part of the upper foot protector forms a foot placement cavity, located below the calf placement cavity on the same side, used to accommodate and position the user's foot. A clearance hole at the bottom of the placement cavity allows the foot massage rollers to extend, enabling them to directly contact and massage the sole of the foot. Mounting holes on both sides of the placement cavity allow for the detachable installation of elastic straps or clamping airbags. The tightening action of the straps or airbags secures the user's foot within the placement cavity, preventing foot displacement during use, while providing a comfortable, enveloping feel, ensuring the stability and effectiveness of the foot massage and alternating stretching movements.

[0020] Compared with existing technologies, this stretchable calf massager has the following advantages: This invention utilizes a single motor and eccentric wheels to achieve alternating foot pressure, simplifying the structure and reducing costs. The eccentric wheels are 90 degrees apart to achieve a comfortable stretching angle, and a Hall effect sensor precisely controls the posture. It integrates calf lifting and stretching, alternating foot swinging, and full-foot rolling massage, achieving multi-dimensional composite functions. Straps or airbags reliably secure the limbs, enhancing comfort and safety. Synchronous wheels drive dual rollers to cover the entire sole, and lower leg support wheels enhance structural stability. Overall, it achieves efficient, comfortable, and low-cost foot massage and stretching. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0022] Figure 2 This is an exploded structural diagram of the present invention.

[0023] Figure 3 This is a schematic diagram of the structure of this utility model when all the outer shells are removed.

[0024] Figure 4 This is a structural schematic diagram of the upper leg frame assembly in this utility model.

[0025] Figure 5 This is a structural schematic diagram of the lower leg bracket assembly in this utility model.

[0026] Figure 6 This is a schematic diagram of the foot massage component in this utility model.

[0027] Figure 7 This is a structural schematic diagram of the present invention in its initial position.

[0028] Figure 8 This is a structural schematic diagram of the present invention at the maximum downward pressure position.

[0029] Figure 9 This is a schematic diagram of the structure of this utility model when the left and right downward pressing angles are synchronized.

[0030] Figure 10 This is a schematic diagram of the structure of this utility model when the foot is raised.

[0031] In the diagram: 1. Rear cover; 2. Upper leg support assembly; 3. Lower leg guard; 4. Foot guard assembly; 5. Foot massager assembly; 6. Lower leg support assembly; 7. Lifting electric push rod; 8. Rear guard plate; 9. Connecting pivot; 10. Upper leg support body; 11. Mounting link; 12. Lifting slide bar; 13. Fixed crossbar; 14. Hinge seat one; 15. Lifting pulley; 16. Lifting sliding rod; 17. Hall effect sensor plate; 18. 19. Eccentric wheel; 20. Drive linkage; 21. Hinge linkage; 22. Drive shaft; 23. Drive motor; 24. Motor housing; 25. Shaft screw; 26. Lower leg support rod; 27. Diagonal linkage; 28. Foot bracket; 29. ​​Synchronous pulley; 30. Foot massage roller; 31. Foot roller motor; 32. Lower foot cover; 33. Upper foot cover; 34. Avoidance hole; 35. Mounting hole two; 36. Mounting hole one. Detailed Implementation

[0032] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0033] like Figures 1-10 As shown, this stretchable calf massager includes an upper leg frame assembly 2 and a lower leg frame assembly 6 slidably connected to the upper leg frame assembly 2. A lifting electric push rod 7 is hinged between the upper leg frame assembly 2 and the lower leg frame assembly 6. A reciprocating drive assembly is provided at the lower front side of the lower leg frame assembly 6. Two footrest massage assemblies 5 that swing up and down are hinged to the reciprocating drive assembly. The two footrest massage assemblies 5 are respectively hinged to the left and right sides of the front part of the lower leg frame assembly 6. A rear cover 1 is provided on the rear and lower sides of the upper leg frame assembly 2. A calf guard 3 is provided on the upper front side of the upper leg frame assembly 2. Foot guard assemblies 4 are provided on the outer side of the footrest massage assemblies 5. The lifting electric push rod 7 is located between the rear cover 1 and the calf guard 3. The lower leg support assembly 6 includes two symmetrically arranged vertically lifting sliding rods 16. Two horizontally arranged lower leg support rods 25 are fixed to the lower part of the lifting sliding rods 16. The reciprocating drive assembly includes a motor housing 23 and a drive shaft 21. The motor housing 23 is fixed to the middle of the front side of the two lower leg support rods 25. A drive motor 22 is provided inside the motor housing 23. The drive shaft 21 is rotatably arranged in front of the lower leg support rod 25 located on the lower side. The drive shaft 21 is connected to the output shaft of the drive motor 22. Eccentric wheels 18 are fixed at both ends of the drive shaft 21. Drive connecting rods 19 are hinged on the eccentric wheels 18. Rotating shaft screws 24 are provided at the ends of the drive connecting rods 19.

[0034] The telescopic movement of the lifting electric push rod 7 causes the lower leg support assembly 6 to slide up and down relative to the upper leg support assembly 2, thereby achieving overall stretching of the lower leg. The reciprocating drive assembly generates periodic reciprocating power, driving the foot massage assemblies 5 on both sides to swing up and down around their hinge points with the lower leg support assembly 6, thereby achieving alternating downward and upward pressure on the left and right feet. The two foot massage assemblies 5 can massage the soles of the feet during the swinging process. The rear cover 1, the lower leg guard 3, and the foot guard assembly 4 provide protection and support for each component. Through the above coordination, the calf stretching, alternating foot swinging, and foot massage are achieved synergistically. The drive motor 22 provides rotational power, and its output shaft drives the drive shaft 21 to rotate. The eccentric wheels 18 at both ends of the drive shaft 21 rotate synchronously with the drive shaft 21. The eccentric structure of the eccentric wheels 18 converts the rotational motion into reciprocating oscillation, driving the drive linkage 19 hinged to the eccentric wheels 18 to perform reciprocating push-pull motion. The pivot screw 24 at the end of the drive linkage 19 is used to hinge with the inclined linkage 26 of the footrest massage assembly 5, thereby transmitting the reciprocating motion to the footrest massage assembly 5, realizing the alternating up-and-down swinging of the left and right footrests. This structure can achieve the alternating downward pressing and upward stretching of both feet with a single motor drive.

[0035] The rear cover 1 is L-shaped. The horizontal section of the rear cover 1 has two symmetrically arranged avoidance holes. The upper leg frame assembly 2 includes a rear guard plate 8. The rear guard plate 8 is fixed to the front side of the vertical section of the rear cover 1. The front side of the rear guard plate 8 is fixed with the upper leg frame body 10. The inner side of the upper leg frame body 10 is fixed with two symmetrically arranged vertically arranged lifting slide rods 12. The upper left and right sides of the upper leg frame body 10 are both fixed with connecting shafts 9. The upper left and right sides of the upper leg frame body 10 are both fixed with two vertically distributed and horizontally arranged mounting rods 11. The upper middle front side of the upper leg frame body 10 is fixed with a hinge seat 14. The middle front side of the upper leg frame body 10 is fixed with a fixing crossbar 13.

[0036] The rear cover 1 is L-shaped, providing bottom and rear support for the overall structure. A clearance hole in its horizontal section avoids the support wheels of the lower leg support assembly 6. The upper leg support assembly 2 is fixed to the front of the vertical section of the rear cover 1 via the rear guard plate 8. The lifting slide rod 12 inside the upper leg support body 10 guides the lifting of the lower leg support assembly 6. The connecting shafts 9 on both sides of the upper leg support body 10 are hinged to the massage chair body. The mounting rod 11 secures the calf guard 3. The hinge seat 14 hinges the upper end of the lifting electric push rod 7. The fixed crossbar 13 reinforces the support of the calf guard 3. This structure together forms the support frame of the upper leg support, providing a structural basis for the lifting of the calf section, the installation of the guard, and the overall hinge.

[0037] Two lifting pulleys 15 are provided on the outer side of each lifting sliding rod 16. The lifting pulleys 15 are slidably arranged inside the lifting sliding groove rod 12 on the same side. Two symmetrically arranged support wheels are fixed at the lower end of the lower leg support rod 25 located on the lower side. The support wheels extend out of the avoidance hole on the same side. Four horizontally arranged hinged connecting rods 20 are fixed on the lower leg support rod 25 located on the lower side. The ends of the hinged connecting rods 20 are all provided with pivot screws 24. A second hinge seat is fixed in the middle of the rear side of the lower leg support rod 25 located on the lower side. The upper and lower ends of the lifting electric push rod 7 are respectively hinged to the first hinge seat 14 and the second hinge seat.

[0038] The lower leg support assembly 6 is slidably mounted on the lifting slide rail 12 of the upper leg support assembly 2 via the lifting pulley 15 on the outer side of the lifting slide rod 16, achieving lifting guidance and support. The two lower leg support rods 25 at the lower part of the lifting slide rod 16 provide lateral structural strength. The support wheel at the lower end of the lower leg support rod 25 extends out of the avoidance hole of the rear cover 1 to contact the ground or base in the lowest position to provide auxiliary support. The four hinged connecting rods 20 fixed on the lower leg support rod 25 and the pivot screws 24 at their ends are used to hinge with the inclined connecting rod 26 of the foot massage assembly 5. The hinge seat 2 on the rear side of the lower leg support rod 25 is hinged to the lower end of the lifting electric push rod 7, and the upper end of the lifting electric push rod 7 is hinged to the hinge seat 14 of the upper leg support assembly 2. When the lifting electric push rod 7 extends or retracts, it drives the lower leg support assembly 6 to slide up and down along the lifting slide rail 12, thereby realizing the lifting and stretching function of the lower leg part.

[0039] The motor housing 23 is located between the two hinged connecting rods 20 in the middle, and a Hall sensor plate 17 is provided on the motor housing 23.

[0040] The reciprocating drive assembly is fixed to the front middle of the lower leg support rod 25 via the motor housing 23, located between the two hinged links 20; the magnet of the output shaft of the drive motor 22 and the Hall sensor plate 17 work together to identify the initial position posture and the posture of synchronous left and right downward pressing angle, so as to obtain a better massage and stretching experience.

[0041] The foot massage assembly 5 includes a footrest 27. Two inclined connecting rods 26 are fixed to the rear side of the footrest 27. The upper ends of the two inclined connecting rods 26 are hinged to the pivot screws 24 of two hinged connecting rods 20 on the same side. The middle part of the outer inclined connecting rod 26 is hinged to the pivot screw 24 of the drive connecting rod 19 on the same side. Two foot massage rollers 29 are rotatably provided at the upper end of the footrest 27. Synchronous pulleys 28 are provided on the pivots of the two foot massage rollers 29. A transmission belt is provided between the two synchronous pulleys 28. A foot roller motor 30 is fixed on the footrest 27. The output shaft of the foot roller motor 30 is connected to the pivot of one of the foot massage rollers 29.

[0042] The footrest massage component 5 is hinged to the hinge link 20 of the lower leg frame component 6 via two diagonal connecting rods 26 on the rear side of the footrest 27. The middle of the outer diagonal connecting rod 26 is also hinged to the drive link 19 of the reciprocating drive component. When the drive link 19 is pushed or pulled, it causes the footrest 27 to swing up and down around the pivot screw 24 of the hinge link 20, achieving alternating downward and upward pressure on the foot. Two foot massage rollers 29 at the upper end of the footrest 27 rotate under the drive of the foot roller motor 30. The output shaft of the foot roller motor 30 directly drives one of the foot massage rollers 29 to rotate. The synchronous pulley 28 on the roller's shaft drives the other synchronous pulley 28 and the corresponding foot massage roller 29 to rotate synchronously via a transmission belt, thus providing a full-foot massage.

[0043] The lower leg guard 3 is W-shaped and is located on the front side of the upper leg frame body 10 and the fixed crossbar 13. The lower leg guard 3 covers the four mounting rods 11 and forms two symmetrically arranged lower leg placement cavities. Mounting holes 35 are provided on both the left and right sides of the lower leg placement cavities. Elastic straps or clamping airbags are detachably installed between the two mounting holes 35.

[0044] The calf protector 3 is W-shaped and is positioned on the front side of the upper leg support body 10 and the fixed crossbar 13, covering the four mounting rods 11 for secure fixation to the front of the upper leg support assembly 2. The calf protector 3 forms two symmetrical calf placement cavities to accommodate and position the user's calves. Mounting holes 35 on both sides of the calf placement cavities are used to install elastic straps or clamping airbags. The tightening action of the straps or airbags secures the user's calves within the placement cavities, preventing calf displacement during use and providing a comfortable wrapping sensation to ensure massage and stretching effects.

[0045] The foot cover assembly 4 includes an upper foot cover body 32 and a lower foot cover body 31 located below the upper foot cover body 32. The upper part of the upper foot cover body 32 forms a foot placement cavity, which is located below the lower leg placement cavity on the same side. The bottom of the foot placement cavity is provided with a clearance hole 33, and the foot massage roller 29 extends out of the clearance hole on the same side. Mounting holes 34 are provided on both the left and right sides of the foot placement cavity, and an elastic strap or clamping airbag is detachably installed between the two mounting holes 34.

[0046] The foot protector assembly 4 consists of an upper foot protector 32 and a lower foot protector 31 below it. The upper part of the upper foot protector 32 forms a foot placement cavity, which is located below the calf placement cavity on the same side, and is used to accommodate and position the user's foot. A clearance hole 33 at the bottom of the placement cavity allows the foot massage roller 29 to extend, enabling it to directly contact and massage the sole of the foot. Mounting holes 34 on both sides of the placement cavity are used for detachably mounting elastic straps or clamping airbags. The tightening action of the straps or airbags secures the user's foot within the placement cavity, preventing foot displacement during use, while providing a comfortable wrapping sensation and ensuring the stability and effectiveness of the foot massage and alternating stretching movements.

[0047] The working principle of this utility model: When using it, the user places both legs in the calf placement cavity and foot placement cavity on the left and right sides respectively.

[0048] 1. Positioning and Fixing: The calf guard 3 is W-shaped and fixed to the front of the upper leg frame body 10 and the fixed crossbar 13, covering the four mounting rods 11. The calf placement cavity formed by it accommodates and positions the calf. Elastic straps or clamping airbags installed between the mounting holes 35 on both sides tighten and fix the calf. The upper part of the foot guard body 32 of the foot guard assembly 4 forms a foot placement cavity, located below the calf placement cavity on the same side, accommodating and positioning the foot. The bottom avoids the hole 33 for the foot massage roller 29 to extend. Elastic straps or clamping airbags between the mounting holes 34 on both sides fix the foot and prevent displacement.

[0049] 2. Overall Lower Leg Extension: The upper end of the lifting electric push rod 7 is hinged to the hinge seat 14 of the upper leg frame assembly 2, and the lower end is hinged to the hinge seat 2 of the lower leg frame assembly 6. The lower leg frame assembly 6 is slidably mounted in the lifting slide rail 12 of the upper leg frame assembly 2 via the lifting pulley 15 on the outside of the lifting slide rod 16. When the lifting electric push rod 7 extends or retracts, it drives the lower leg frame assembly 6 to slide up and down along the lifting slide rail 12, realizing the overall lifting and extension of the lower leg portion. The support wheel at the lower end of the lower leg frame rod 25 extends out of the avoidance hole of the rear cover 1, and contacts the ground or base to provide auxiliary support when in the lowest position.

[0050] 3. Foot massage: In the foot support massage assembly 5, the two foot massage rollers 29 at the upper end of the foot support 27 rotate under the drive of the foot roller motor 30. The output shaft of the foot roller motor 30 directly drives one of the foot massage rollers 29 to rotate. The synchronous wheel 28 on the roller shaft drives the other synchronous wheel 28 and the corresponding foot massage roller 29 to rotate synchronously through the transmission belt, so as to perform full foot massage.

[0051] 4. Alternating Foot Pressing and Stretching: In the reciprocating drive assembly, the drive motor 22 is fixed inside the motor housing 23, which is fixed to the middle of the front side of the lower leg support rod 25. The drive motor 22 drives the drive shaft 21 to rotate, and the eccentric wheels 18 at both ends of the drive shaft 21 convert the rotational motion into reciprocating oscillation, driving the hinged drive linkage 19 to perform reciprocating push-pull motion. The pivot screw 24 at the end of the drive linkage 19 is hinged to the middle of the inclined linkage 26 on the outside of the footrest massage assembly 5. The footrest massage assembly 5 is hinged to the pivot screw 24 of the hinged linkage 20 on the same side through the upper ends of the two inclined linkages 26. When the drive linkage 19 pushes and pulls, it drives the footrest 27 to swing up and down around the pivot screw 24 of the hinged linkage 20, realizing the alternating pressing and lifting of the left and right feet. The magnet on the output shaft of the drive motor 22 cooperates with the Hall sensor plate 17 on the motor housing 23 to identify the initial position and the synchronized posture of the left and right pressing angles, thus obtaining a better massage and stretching experience.

[0052] 5. Overall Coordination: The rear cover 1 is L-shaped, providing bottom and rear support for the entire unit. Avoidance holes on its upper horizontal section allow for the movement of support wheels. The upper leg support assembly 2 is fixed to the front of the vertical section of the rear cover 1 via the rear guard plate 8, and hinges 9 on both sides connect to the main body of the massage chair. Through the coordinated action of the above structures, a combination of functions is achieved, including lower leg lifting and stretching, full foot massage, and alternating foot pressing and stretching, effectively activating the ankles and relaxing leg muscles.

[0053] In summary, this invention utilizes a single drive motor in conjunction with eccentric wheels at both ends of the drive shaft to simultaneously drive the drive linkages on both sides, enabling alternating downward and upward extension of the feet without the need for a separate motor for each foot. This compact structure and efficient transmission reduce manufacturing costs and assembly difficulty, while also minimizing potential failure points and improving product reliability.

[0054] The left and right eccentric wheels are mounted at 90-degree angles on the drive shaft, allowing the feet to achieve a smaller upward angle and a larger downward angle, resulting in gentle movements and proper stretching. Combined with a Hall effect sensor and magnets on the motor shaft, the initial position of the footrest and the synchronized downward angles of the left and right sides can be accurately identified, enabling programmed control, avoiding movement conflicts, and enhancing massage comfort.

[0055] This invention integrates three main functions: calf lifting and stretching, alternating foot swing and pressing, and full-foot rolling massage. The lifting electric push rod drives the lower leg support to slide up and down, achieving longitudinal stretching of the calf muscles; the reciprocating drive component drives the footrest to swing alternately, activating the ankle joint; and the left and right foot roller motors independently control the foot massage rollers, allowing for differentiated adjustment of massage intensity. These three functions work together to achieve a more flexible and personalized massage experience.

[0056] The calf protector is W-shaped, forming symmetrical calf placement chambers on both sides. The foot protector assembly forms a foot placement chamber, and both can be detachably fitted with elastic straps or clamping airbags through mounting holes. During use, the straps or airbags reliably fix the calf and foot, preventing limb displacement during massage, while providing a soft, enveloping feel, ensuring both massage effectiveness and improved comfort.

[0057] In each foot massage component, a foot roller motor drives two foot massage rollers to rotate synchronously via a synchronous pulley and a transmission belt, achieving comprehensive massage coverage from the heel to the sole of the foot. Simultaneously, the support wheels at the lower end of the leg rest extend and retract within the holes in the rear cover, contacting the ground or base at the lowest position to provide auxiliary support, preventing the entire machine from tipping over and enhancing structural stability and safety.

[0058] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A stretchable calf massager, comprising an upper leg support assembly (2) and a lower leg support assembly (6) slidably connected to the upper leg support assembly (2), characterized in that, A lifting electric push rod (7) is hinged between the upper leg frame assembly (2) and the lower leg frame assembly (6). A reciprocating drive assembly is provided at the lower front side of the lower leg frame assembly (6). Two foot massage assemblies (5) that swing up and down are hinged on the reciprocating drive assembly. The two foot massage assemblies (5) are respectively hinged on the left and right sides of the front of the lower leg frame assembly (6). A rear cover (1) is provided on the rear and lower sides of the upper leg frame assembly (2). A calf guard (3) is provided on the upper front side of the upper leg frame assembly (2). Foot guard assemblies (4) are provided on the outer side of the foot massage assemblies (5). The lifting electric push rod (7) is located between the rear cover (1) and the calf guard (3). The lower leg support assembly (6) includes two vertically arranged lifting sliding rods (16) that are symmetrical on the left and right. Two horizontally arranged lower leg support rods (25) are fixed at the lower part of the lifting sliding rods (16). The reciprocating drive assembly includes a motor housing (23) and a drive shaft (21). The motor housing (23) is fixed at the front middle of the two lower leg support rods (25). A drive motor (22) is provided inside the motor housing (23). The drive shaft (21) is rotatably arranged at the front of the lower leg support rod (25) located on the lower side. The drive shaft (21) is connected to the output shaft of the drive motor (22). Eccentric wheels (18) are fixed at both ends of the drive shaft (21). A drive connecting rod (19) is hinged on the eccentric wheel (18). A rotating shaft screw (24) is provided at the end of the drive connecting rod (19).

2. The stretchable calf massager according to claim 1, characterized in that, The rear cover (1) is L-shaped. The horizontal section of the rear cover (1) has two symmetrically arranged avoidance holes. The upper leg frame assembly (2) includes a rear guard plate (8). The rear guard plate (8) is fixed to the front side of the vertical section of the rear cover (1). The front side of the rear guard plate (8) is fixed with an upper leg frame body (10). The inner side of the upper leg frame body (10) is fixed with two symmetrically arranged vertically arranged lifting slide bars (12). The upper left and right sides of the upper leg frame body (10) are fixed with connecting shafts (9). The upper left and right sides of the upper leg frame body (10) are fixed with two vertically distributed and horizontally arranged mounting rods (11). The upper middle part of the front side of the upper leg frame body (10) is fixed with a hinge seat (14). The middle part of the front side of the upper leg frame body (10) is fixed with a fixing crossbar (13).

3. A calf massager with a stretchable foot as described in claim 2, characterized in that, Two lifting pulleys (15) are provided on the outer side of the lifting sliding rod (16). The lifting pulleys (15) are slidably arranged inside the lifting sliding groove rod (12) on the same side. Two support wheels are fixed at the lower end of the lower leg support rod (25) located on the lower side. The support wheels extend out of the avoidance hole on the same side. Four horizontally arranged hinged connecting rods (20) are fixed on the lower leg support rod (25) located on the lower side. The ends of the hinged connecting rods (20) are all provided with pivot screws (24). A second hinge seat is fixed in the middle of the rear side of the lower leg support rod (25) located on the lower side. The upper and lower ends of the lifting electric push rod (7) are respectively hinged to the first hinge seat (14) and the second hinge seat.

4. A calf massager with a stretchable foot as described in claim 3, characterized in that, The motor housing (23) is located between the two hinged connecting rods (20) in the middle, and a Hall sensor plate (17) is provided on the motor housing (23).

5. A calf massager with a stretchable foot as described in claim 4, characterized in that, The foot massage assembly (5) includes a footrest (27). Two inclined connecting rods (26) are fixed to the rear side of the footrest (27). The upper ends of the two inclined connecting rods (26) are hinged to the pivot screws (24) of two hinged connecting rods (20) on the same side. The middle part of the inclined connecting rod (26) on the outer side is hinged to the pivot screw (24) of the drive connecting rod (19) on the same side. Two foot massage rollers (29) are rotatably provided on the upper end of the footrest (27). Synchronous pulleys (28) are provided on the pivot shafts of the two foot massage rollers (29). A transmission belt is provided between the two synchronous pulleys (28). A foot roller motor (30) is fixed on the footrest (27). The output shaft of the foot roller motor (30) is connected to the pivot shaft of one of the foot massage rollers (29).

6. A calf massager with a stretchable foot as described in claim 5, characterized in that, The lower leg guard (3) is W-shaped and is located on the front side of the upper leg frame body (10) and the fixed crossbar (13). The lower leg guard (3) covers four mounting rods (11) and forms two symmetrically arranged lower leg placement cavities. Mounting holes (35) are provided on both the left and right sides of the lower leg placement cavities. Elastic straps or clamping airbags are detachably installed between the two mounting holes (35).

7. A stretchable calf massager according to claim 6, characterized in that, The foot cover assembly (4) includes an upper foot cover body (32) and a lower foot cover body (31) located below the upper foot cover body (32). The upper part of the upper foot cover body (32) forms a foot placement cavity, which is located below the lower leg placement cavity on the same side. The bottom of the foot placement cavity is provided with a clearance hole (33), and the foot massage roller (29) extends out of the clearance hole on the same side. Mounting holes 2 (34) are provided on both the left and right sides of the foot placement cavity. An elastic strap or clamping airbag is detachably installed between the two mounting holes 2 (34).

Images