A foot decompression device for diabetic foot

Abstract

This invention belongs to the field of medical device technology and discloses a foot pressure relief device for diabetic foot. It includes a base, a pressure relief plate and a motor connected to the base, and a foot pedal and a transmission assembly connected to the pressure relief plate. The transmission assembly includes a crank, a first connecting rod, and a sliding seat. The crank is fixedly connected to the output shaft of the motor, and the sliding seat is connected to the pressure relief plate. The two ends of the first connecting rod are respectively connected to the crank and the sliding seat. The sliding seat is connected to a foot rolling shaft and a second connecting rod, and the second connecting rod is connected to a foot massage roller. A buffer spring is provided between the pressure relief plate and the base. The foot pedal has a through groove, and the foot rolling shaft is connected to a foot massage roller. This invention utilizes the foot rolling shaft / foot massage roller and the foot massage roller to simultaneously perform rolling massage on the sole and instep of the foot. The periodic oscillation of the pressure relief plate causes the heel and toes to alternately rise, resulting in good pressure relief for the foot.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a foot decompression device for diabetic foot. Background Technology

[0002] Diabetic foot is one of the most serious chronic complications of diabetes. It is a complex foot disease caused by long-term hyperglycemia leading to distal neuropathy and varying degrees of vascular disease in the lower extremities. Specifically, diabetic patients often have peripheral neuropathy, resulting in decreased or even lost protective sensation, making it difficult for them to perceive abnormal local pressure in the foot. At the same time, vascular disease leads to insufficient blood supply to the foot tissues, increasing the fragility of the skin and subcutaneous tissues under ischemic and hypoxic conditions, and significantly reducing their tolerance to pressure. Under the combined effects of "decreased sensation + insufficient blood supply + concentrated pressure," the local tissues of the sole are highly susceptible to ischemic necrosis and ulceration under sustained high pressure, eventually forming chronic ulcers. Once an ulcer develops, the risk of infection increases dramatically, treatment becomes significantly more difficult, and the risk of amputation also rises.

[0003] The feet are an important convergence point of the body's meridians. Stimulating specific acupoints can regulate the flow of Qi and blood, unblock meridians, and harmonize the functions of the internal organs. For example, the Yongquan acupoint (the Jing-Well point of the Kidney Meridian of Foot-Shaoyin), located on the sole of the foot, can draw fire back to its source, nourish Yin and reduce fire, and improve blood circulation in the feet. The Taichong acupoint (the Yuan-Source point of the Liver Meridian of Foot-Jueyin), located on the dorsum of the foot, has the effect of soothing the liver, regulating Qi and blood, and harmonizing Qi and blood. The Neiting acupoint (the Ying-Spring point of the Stomach Meridian of Foot-Yangming), located on the dorsum of the foot, can clear heat and harmonize the stomach, unblock meridians, and relieve pain. Massaging these acupoints can effectively improve blood circulation in the feet, relieve numbness and tingling caused by neuropathy, and promote ulcer healing. Therefore, effective foot decompression measures to prevent the formation of high-pressure zones on the soles of the feet and improve local blood circulation are of vital clinical significance for the prevention and treatment of diabetic foot.

[0004] Currently, decompression devices used clinically for diabetic foot mainly include decompression shoes, decompression braces, and foot massagers. These devices are mostly limited to simple foot rolling or vibration massage, lacking synchronous care for the dorsum of the foot, resulting in poor decompression effect on the foot and failing to meet the actual needs of diabetic foot patients in preventing ulcers, improving circulation, and promoting rehabilitation. Summary of the Invention

[0005] The present invention aims to provide a foot pressure relief device for diabetic foot, which uses a foot rolling shaft (connected with a foot massage roller) and a foot instep massage roller to simultaneously perform rolling massage on the sole and instep of the foot respectively, which can effectively improve the pressure relief effect on the foot, promote blood circulation in the foot, and solve the problems in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A foot pressure relief device for diabetic foot includes a base, a pressure relief plate and a motor connected to the base, a foot pedal and a transmission assembly connected to the pressure relief plate, and a transmission assembly including a crank, a first connecting rod and a sliding seat. The crank is fixedly connected to the output shaft of the motor, and the sliding seat is slidably connected to the pressure relief plate. The two ends of the first connecting rod are rotatably connected to the crank and the sliding seat, respectively. When the motor drives the crank to rotate periodically, the sliding seat reciprocates linearly along the axial direction of the pressure relief plate. The sliding seat is also rotatably connected to a second connecting rod and a foot roller. The end of the second connecting rod away from the sliding seat is rotatably connected to a foot massage roller. The foot roller and the foot massage roller are respectively located on the lower and upper sides of the foot pedal and are used for massage and pressure relief of the instep and sole, respectively.

[0008] Furthermore, the base is also fixedly connected to a pair of fixed seats, and the pressure-reducing substrate is rotatably connected between the pair of fixed seats via a rotating shaft; when the sliding seat reciprocates linearly along the axial direction of the pressure-reducing substrate, the pressure-reducing substrate swings back and forth relative to the fixed seats, and when the sliding seat moves from the heel to the toe side, the heel part of the pressure-reducing substrate swings upward and the toe part swings downward, and when the sliding seat moves from the toe to the heel side, the toe part of the pressure-reducing substrate swings upward and the heel part swings downward.

[0009] Furthermore, a number of buffer springs are provided between the pressure-reducing substrate and the base.

[0010] Furthermore, the buffer spring includes a heel buffer spring and a toe buffer spring. The heel buffer spring is located on the lower side of the heel of the pressure-reducing plate, and the toe buffer spring is located on the lower side of the toe of the pressure-reducing plate. The elastic coefficient of the heel buffer spring is greater than that of the toe buffer spring.

[0011] Furthermore, the foot pedal has several through grooves, and the foot rolling shaft is detachably connected to several foot massage rollers that cooperate with the through grooves. The highest end face of the foot massage roller passes through the through groove and is located on the upper side of the upper surface of the foot pedal.

[0012] Furthermore, the surfaces of the foot massage roller and the instep massage roller are provided with arc-shaped protrusions. The foot massage roller and the instep massage roller are available in different models, and the height of the arc-shaped protrusions is different for different models of foot massage roller and instep massage roller.

[0013] Furthermore, the motor is a dual-output shaft motor, and there are two sets of transmission components and two sets of second connecting rods. The sliding seats of the two sets of transmission components are respectively slidably disposed on the left and right sides of the pressure reducing plate. The cranks of the two transmission components are respectively connected to the two output shafts of the motor. The foot massage roller is rotatably connected between the two sets of second connecting rods.

[0014] Furthermore, it also includes a protective pad made of a flexible waterproof material, which is detachably placed on the upper surface of the pressure-reducing substrate.

[0015] Furthermore, the substrate is provided with a storage cavity and a storage tank, the motor is located inside the storage cavity, the substrate is detachably connected with a cover plate for opening and / or closing the storage cavity, and the pressure reducing plate is located inside the storage tank.

[0016] Furthermore, the foot pressure relief device is arranged in pairs, and the pair of foot pressure relief devices are connected by an adjusting connector.

[0017] The principles and beneficial effects of the technical solution are as follows:

[0018] 1. The present invention provides a foot pressure relief device for diabetic foot, comprising a pressure relief base plate and a motor connected to a base, the pressure relief base plate being connected to a foot pedal and a transmission assembly, the transmission assembly including a crank, a first connecting rod and a sliding seat, the crank being fixedly connected to the output shaft of the motor, the sliding seat being slidably connected to the pressure relief base plate, the two ends of the first connecting rod being rotatably connected to the crank and the sliding seat respectively, the motor, crank, connecting rod and sliding seat forming a crank-slider structure, when the motor drives the crank to rotate periodically, the sliding seat reciprocates linearly along the axial direction of the pressure relief base plate; the sliding seat is also rotatably connected to a second connecting rod and a foot rolling shaft, the second connecting rod being rotatably connected to a foot massage roller, the foot rolling shaft and the foot massage roller being respectively located on the lower and upper sides of the foot pedal. When using this device to relieve pressure on the feet of diabetic patients, the patient places their foot on the foot pedal, so that the sole of the foot contacts the foot roller and the instep contacts the instep massage roller. The motor is started, and the crank drives the sliding seat to reciprocate linearly along the pressure relief plate through the first connecting rod. The sliding seat drives the foot roller to reciprocate under the foot pedal, and at the same time, it drives the instep massage roller to reciprocate synchronously on the upper side of the instep through the second connecting rod, so as to achieve synchronous massage on both the sole and the instep. During this process, the foot roller presses on the Yongquan acupoint (the Jing-Well point of the Kidney Meridian of Foot-Shaoyin, which can draw fire back to its source and nourish Yin to reduce fire), the Shimian acupoint, and the quadratus digitorum brevis and flexor digitorum brevis muscles on the sole of the foot. Meanwhile, the foot massage roller presses on the Taichong acupoint (the Yuan-Source point of the Liver Meridian of Foot-Jueyin, which can soothe the liver and regulate Qi and blood), the Neiting acupoint (the Ying-Spring point of the Stomach Meridian of Foot-Yangming, which can clear heat and harmonize the stomach, and relieve pain), the Chongyang acupoint, and the extensor digitorum longus and extensor hallucis longus tendons on the dorsum of the foot. This dual-sided synergistic stimulation effectively unblocks the meridians of the foot, harmonizes Qi and blood, relaxes muscles, soothes nerves, improves blood circulation in the foot, relieves numbness and tingling caused by neuropathy, and promotes ulcer healing. In other words, the pressure-reducing device of this apparatus increases the massage area per unit time, improving massage efficiency; it also simultaneously stimulates the sole and dorsum of the foot, more comprehensively activating the meridians and acupoints of the foot, forming a corresponding acupoint stimulation network to maximize the therapeutic effect of acupoint massage. Furthermore, the foot roller and the instep massage roller are driven by the same sliding seat, ensuring the synchronicity of their movements and the correspondence of their positions. This keeps the foot in a stable stress state during the massage process, avoiding sprains or discomfort caused by asynchrony.

[0019] 2. The present invention provides a foot pressure relief device for diabetic foot, wherein a base is connected to a pair of fixed seats, and a pressure relief plate is rotatably connected between the pair of fixed seats via a rotating shaft; when the sliding seat reciprocates linearly along the axial direction of the pressure relief plate, the pressure relief plate swings back and forth relative to the fixed seats. When the sliding seat moves from the heel to the toe, the heel portion of the pressure relief plate swings upward and the toe portion swings downward; when the sliding seat moves from the toe to the heel, the toe portion of the pressure relief plate swings upward and the heel portion swings downward. This structure allows the patient to passively complete a cyclical movement of "lifting the heel-flattening-lifting the toes" while receiving a massage, simulating the natural gait of human walking. Its physiological significance lies in the following: First, passive ankle joint movement can effectively prevent joint stiffness and maintain joint mobility, which is especially important for diabetic patients who are bedridden for a long time or have limited mobility. Second, the alternating raising of the heel and toes creates a "muscle pump" effect: when the heel is raised, the posterior calf muscles (gastrocnemius and soleus) are stretched, promoting the centripetal return of venous blood and lymph; when the toes are raised, the anterior calf muscles are activated, further promoting blood circulation. This dynamic swinging and double-sided massage work together to form a dual improvement mechanism of "massage promoting local circulation and swinging promoting overall return," which significantly enhances the promotion of lower limb blood circulation compared to static massage devices. Third, the periodic changes in body position constantly change the distribution of pressure on the sole of the foot, avoiding local tissues from bearing constant pressure for a long time and effectively preventing the formation of pressure ulcers.

[0020] 3. This invention provides a foot decompression device for diabetic foot, in which a heel cushioning spring and a toe cushioning spring are provided between the decompression plate and the base, and the elastic coefficient of the heel cushioning spring is greater than that of the toe cushioning spring. This differentiated spring design is based on the biomechanical principles of the foot: when a person stands and walks, the impact force on the heel is about 2 to 3 times the body weight, while the pressure on the forefoot is relatively smaller and more widely distributed; diabetic patients have a thicker stratum corneum and less soft tissue on their heels, resulting in poor cushioning ability against hard impacts and making them more prone to ischemia and necrosis due to concentrated pressure. By setting a heel cushioning spring with a larger elastic coefficient, on the one hand, it provides stronger support and cushioning when the decompression plate swings downward, avoiding damage caused by hard impact between the heel and the foot pedal; on the other hand, when the decompression plate swings upward, the larger elastic coefficient can produce a faster rebound, assisting in lifting the heel and reducing the burden on the patient to actively lift the foot. The toe-mounted cushioning spring has a lower elastic coefficient, which caters to the need for gentle contact in the forefoot area and avoids excessive pressure on high-risk areas for ulcers, such as the metatarsal heads. Foot ulcers are most common in diabetic patients in the first metatarsal head area, and excessive impact significantly increases the risk of ulceration. The lower elastic coefficient ensures a soft contact in this area. This differentiated cushioning design provides precise protection for different areas of the foot, ensuring smooth dynamic movement while minimizing the risk of injury.

[0021] 4. This invention provides a foot pressure relief device for diabetic foot ulcers. A foot pedal has a through groove, and a foot massage roller that cooperates with the through groove is connected to a foot roller. The highest end face of the foot massage roller passes through the through groove and is located on the upper side of the upper surface of the foot pedal. Both the foot massage roller and the instep massage roller have arc-shaped protrusions on their surfaces and are available in different sizes. The through groove structure allows the foot massage roller to directly contact the skin of the sole of the foot, while the foot pedal provides a stable support plane, avoiding instability caused by the massage roller being suspended. The detachable massage roller allows patients or medical personnel to flexibly select and replace different models of massage rollers according to the location of foot ulcers, the degree of neuropathy, and the stage of treatment. For patients already at risk of heel ulcers, massage rollers with no or low protrusions in the corresponding area of ​​the heel can be selected to avoid the affected area. For patients with diminished sensation, low-protrusion massage rollers can be used initially for adaptation training, and later replaced with high-protrusion massage rollers to enhance stimulation. Furthermore, the arc-shaped protrusion design simulates the effect of traditional Chinese medicine acupressure, providing precise stimulation to acupoints on the sole of the foot (such as Yongquan acupoint) and enhancing the therapeutic effect. The selection of models with different protrusion heights allows for quantifiable adjustment of stimulation intensity, meeting multi-level needs from prevention and health care to rehabilitation treatment. The instep massage roller also features a replaceable design, working in conjunction with the sole massage roller to achieve precise stimulation of acupoints on the dorsum of the foot (such as Taichong and Neiting acupoints), forming a corresponding acupoint stimulation network to maximize the therapeutic effect of acupoint massage.

[0022] 5. This invention provides a foot pressure relief device for diabetic feet. The motor is a dual-output shaft motor, and there are two sets of transmission components and two sets of second connecting rods. The sliding seats of the two sets of transmission components are slidably mounted on the left and right sides of the pressure relief base plate, respectively. The cranks of the two transmission components are connected to the two output shafts of the motor, and the instep massage roller is rotatably connected between the two second connecting rods. This symmetrical dual-drive structure design ensures the stability and balance of the massage process: the synchronously driven sliding seats on both sides ensure that the foot rolling shaft remains horizontal during reciprocating motion, avoiding tilting or jamming caused by unilateral drive, and ensuring even force distribution on the sole of the foot; the instep massage roller is connected between the two second connecting rods, forming a stable bridge structure. No matter where the massage roller moves, the support points on both sides can ensure uniform contact pressure with the instep, avoiding the uneven load problem easily caused by a unilateral cantilever structure. The dual-output shaft motor simultaneously drives the transmission components on both sides, ensuring complete synchronization of left and right movements without the need for complex synchronization mechanisms. The structure is simple, the function is reliable, and it also improves the comfort and safety of use.

[0023] 6. This invention provides a foot decompression device for diabetic patients, which also includes a protective pad made of flexible waterproof material (such as medical rubber material), detachably placed on the upper surface of the decompression base plate. This solves the hygiene problems caused by ulcers and damage to the feet of diabetic patients: the protective pad can be replaced or cleaned and disinfected regularly to avoid cross-infection; the flexible waterproof material ensures comfort while preventing liquid from seeping into the interior and damaging electronic components. The base has a storage cavity and a storage tank, with the motor located inside the storage cavity. The base is detachably connected to a cover plate, and the decompression base plate is located inside the storage tank, encapsulating and protecting the core components such as the motor, while facilitating inspection and maintenance; the detachable cover plate design makes it easy to replace the battery or inspect the circuit. The foot decompression devices are arranged in pairs and connected by an adjustable connector, allowing the device to adjust the left and right distance according to the patient's shoulder width, sitting posture, and other actual conditions, ensuring comfortable placement and symmetrical pressure on both feet. Attached Figure Description

[0024] Figure 1 This is an exploded view of a pair of foot decompression devices for diabetic foot according to the present invention;

[0025] Figure 2 This is a front view of a pair of foot decompression devices for diabetic foot according to the present invention;

[0026] Figure 3 for Figure 2 Sectional view of AA;

[0027] Figure 4 for Figure 2 Sectional view of BB;

[0028] Figure 5 This is a top view of a pair of diabetic foot decompression devices according to the present invention;

[0029] Figure 6 This is a schematic diagram of a pair of foot decompression devices for diabetic foot according to the present invention.

[0030] The names of the corresponding labels in the attached diagram are:

[0031] 1. Base body; 2. Fixing base; 3. Pressure reducing base plate; 4. Motor; 5. Crank; 6. First connecting rod; 7. Sliding seat; 8. Second connecting rod; 9. Foot pedal; 10. Foot rolling shaft; 11. Foot massage roller; 12. Instep massage roller; 13. Heel cushioning spring; 14. Toe cushioning spring; 15. Through groove; 16. Cover plate; 17. Adjustment connector. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0033] like Figures 1 to 6As shown, a foot decompression device for diabetic foot includes a base 1, with a decompression base plate 3 and a motor 4 connected to the base 1. Specifically, the base 1 has a storage cavity and a storage tank, the motor 4 is located inside the storage cavity, the base 1 is detachably connected to a cover plate 16 for opening and / or closing the storage cavity, a pair of fixing seats 2 are fixedly connected to the inside of the storage tank, and the decompression base plate 3 is rotatably connected between the pair of fixing seats 2 via a rotating shaft.

[0034] The pressure-reducing base plate 3 is connected to a foot pedal 9 and two sets of transmission components. The transmission components include a crank 5, a first connecting rod 6, and a sliding seat 7. The crank 5 is fixedly connected to the output shaft of the motor 4, and the sliding seat 7 is slidably connected to the pressure-reducing base plate 3. The two ends of the first connecting rod 6 are rotatably connected to the crank 5 and the sliding seat 7, respectively. The motor 4 is a dual-output shaft motor. The sliding seats 7 of the two sets of transmission components are slidably disposed on the left and right sides of the pressure-reducing base plate 3, respectively. The cranks 5 of the two transmission components are respectively connected to the two output shafts of the motor 4. When the motor 4 drives the crank 5 to rotate periodically, the sliding seat 7 reciprocates linearly along the axial direction of the pressure-reducing base plate 3. When the sliding seat 7 reciprocates linearly along the axial direction of the pressure-reducing base plate 3, the pressure-reducing base plate 3 swings back and forth relative to the fixed seat 2. When the sliding seat 7 moves from the heel to the toe, the heel part of the pressure-reducing base plate 3 swings upward and the toe part swings downward. When the sliding seat 7 moves from the toe to the heel, the toe part of the pressure-reducing base plate 3 swings upward and the heel part swings downward.

[0035] The sliding seat 7 is rotatably connected to the foot rolling shaft 10 and two second connecting rods 8. The two second connecting rods 8 are rotatably connected to the ends away from the sliding seat 7, and the foot massage roller 12 is located on the lower and upper sides of the foot pedal 9, respectively, for massaging and relieving pressure on the instep and sole.

[0036] Several buffer springs are also provided between the pressure-reducing substrate 3 and the base 1. The buffer springs include a heel buffer spring 13 and a toe buffer spring 14. The heel buffer spring 13 is located on the lower side of the heel of the pressure-reducing substrate 3, and the toe buffer spring 14 is located on the lower side of the toe of the pressure-reducing substrate 3. The elastic coefficient of the heel buffer spring 13 is greater than that of the toe buffer spring 14. Several through grooves 15 are provided on the foot pedal 9. Several foot massage rollers 11 that cooperate with the through grooves 15 are detachably connected to the foot rolling shaft 10. The highest end face of the foot massage roller 11 passes through the through grooves 15 and is located on the upper side of the upper surface of the foot pedal 9.

[0037] In addition, in this embodiment, both the sole massage roller 11 and the instep massage roller 12 have arc-shaped protrusions on their surfaces, and both models of the sole massage roller 11 and the instep massage roller 12 have different heights of arc-shaped protrusions. A protective pad (not shown in the figure) is also included. The protective pad is made of a flexible waterproof material. In this embodiment, the protective pad is made of medical rubber material and can be detachably placed on the upper surface of the pressure-reducing substrate 3. The foot pressure-reducing devices are arranged in pairs, and the pair of foot pressure-reducing devices are connected by an adjusting connector 17.

[0038] The specific implementation process is as follows:

[0039] When using this pressure-reducing device, first select the appropriate model of foot massage roller 11 and instep massage roller 12 (with different arc-shaped protrusion heights) according to the patient's actual situation and install them in the corresponding positions; then place the foot on the foot pedal 9, positioning it between the foot roller 10 and the instep massage roller 12, with the foot massage roller 11 passing through the groove to contact the sole of the foot and the instep to contact the instep massage roller 12 (if a protective pad is used, place the protective pad on the upper surface of the pressure-reducing base plate 3 first); finally, start the motor 4 to perform synchronous massage and pressure reduction on the sole and instep.

[0040] When the motor 4 is running, the crank 5 drives the sliding seat 7 to reciprocate linearly along the pressure relief plate 3 through the first connecting rod 6. The sliding seat 7 drives the foot rolling shaft 10 to reciprocate under the foot pedal 9. At the same time, the second connecting rod 8 drives the foot massage roller 12 to reciprocate synchronously on the upper side of the instep, so as to achieve double-sided synchronous massage of the sole and instep. Specifically, the foot massage roller 11 presses the Yongquan acupoint (the Jing-well point of the Kidney Meridian of Foot-Shaoyin, which can draw fire back to its source and nourish yin and reduce fire), the Shimian acupoint, and the quadratus digiti minimi and flexor digitorum brevis muscles on the sole of the foot by rolling and pressing the Taichong acupoint (the Yuan-source point of the Liver Meridian of Foot-Jueyin, which can soothe the liver and regulate qi and blood), the Neiting acupoint (the Ying-spring point of the Stomach Meridian of Foot-Yangming, which can clear heat and harmonize the stomach, unblock the meridians and relieve pain) on the dorsum of the foot by rolling and pressing the extensor digitorum longus tendon and extensor hallucis longus tendon. Through the synergistic stimulation of both sides, it can unblock the meridians of the foot, regulate qi and blood, improve blood circulation in the lower limbs, relieve numbness and tingling caused by neuropathy, and promote ulcer healing.

[0041] Simultaneously, during the reciprocating motion of the sliding seat 7, the pressure-reducing plate 3 swings back and forth relative to the fixed seat 2: when the sliding seat 7 moves from the heel to the toe, the heel part of the pressure-reducing plate 3 swings upward and the toe part swings downward (heel-raised state); when the sliding seat 7 moves from the toe to the heel, the toe part of the pressure-reducing plate 3 swings upward and the heel part swings downward (toe-raised state). This periodic swinging allows the patient to passively complete the "heel-flatten-toe-raise" cycle while receiving a massage, simulating the natural gait of the human body when walking, further promoting blood circulation in the lower limbs. The heel buffer spring 13 and the toe buffer spring 14 provide differentiated cushioning protection during the swinging process: the heel buffer spring 13 has a larger elastic coefficient, providing stronger support and cushioning for the heel when the pressure-reducing plate swings downward; the toe buffer spring 14 has a smaller elastic coefficient, conforming to the characteristic of the forefoot requiring gentle contact, avoiding excessive pressure on high-risk areas for ulcers such as the metatarsal heads.

[0042] Motor 4 is a dual-output shaft motor that drives the transmission components on both sides simultaneously, ensuring that the foot rolling shaft 10 remains horizontal during reciprocating motion, thus ensuring even force distribution on the sole of the foot. The instep massage roller 12 is connected between the second connecting rods 8 on both sides, forming a stable bridge structure to ensure uniform contact pressure with the instep.

[0043] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific technical solutions or characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A foot pressure relief device for diabetic foot, characterized in that, The device includes a base, to which a pressure-reducing plate and a motor are connected. The pressure-reducing plate is connected to a foot pedal and a transmission assembly. The transmission assembly includes a crank, a first connecting rod, and a sliding seat. The crank is fixedly connected to the output shaft of the motor, and the sliding seat is slidably connected to the pressure-reducing plate. The two ends of the first connecting rod are rotatably connected to the crank and the sliding seat, respectively. When the motor drives the crank to rotate periodically, the sliding seat reciprocates linearly along the axial direction of the pressure-reducing plate. The sliding seat is also rotatably connected to a second connecting rod and a foot roller. The end of the second connecting rod away from the sliding seat is rotatably connected to a foot massage roller. The foot roller and the foot massage roller are respectively located on the lower and upper sides of the foot pedal and are used for massage and pressure reduction of the instep and sole, respectively.

2. The foot decompression device for diabetic foot according to claim 1, characterized in that, The base is also fixedly connected to a pair of fixed seats, and the pressure relief plate is rotatably connected between the pair of fixed seats via a rotating shaft; when the sliding seat reciprocates linearly along the axial direction of the pressure relief plate, the pressure relief plate swings back and forth relative to the fixed seats, and when the sliding seat moves from the heel to the toe side, the heel part of the pressure relief plate swings upward and the toe part swings downward, and when the sliding seat moves from the toe to the heel side, the toe part of the pressure relief plate swings upward and the heel part swings downward.

3. A foot decompression device for diabetic foot according to claim 2, characterized in that, Several buffer springs are also provided between the pressure-reducing substrate and the base.

4. A foot decompression device for diabetic foot according to claim 3, characterized in that, The buffer spring includes a heel buffer spring and a toe buffer spring. The heel buffer spring is located on the lower side of the heel of the pressure-reducing plate, and the toe buffer spring is located on the lower side of the toe of the pressure-reducing plate. The elastic coefficient of the heel buffer spring is greater than that of the toe buffer spring.

5. A foot decompression device for diabetic foot according to claim 2, characterized in that, The foot pedal has several through grooves, and the foot rolling shaft is detachably connected to several foot massage rollers that cooperate with the through grooves. The highest end face of the foot massage roller passes through the through groove and is located on the upper side of the upper surface of the foot pedal.

6. A foot decompression device for diabetic foot according to claim 5, characterized in that, The surfaces of the foot massage roller and the instep massage roller are provided with arc-shaped protrusions. The foot massage roller and the instep massage roller are available in different models, and the height of the arc-shaped protrusions varies for different models.

7. A foot decompression device for diabetic foot according to claim 2, characterized in that, The motor is a dual-output shaft motor. There are two sets of transmission components and two sets of second connecting rods. The sliding seats of the two sets of transmission components are slidably disposed on the left and right sides of the pressure reducing plate. The cranks of the two transmission components are respectively connected to the two output shafts of the motor. The foot massage roller is rotatably connected between the two sets of second connecting rods.

8. A foot decompression device for diabetic foot according to claim 1, characterized in that, It also includes a protective pad made of a flexible waterproof material, which is detachably placed on the upper surface of the pressure-reducing substrate.

9. A foot decompression device for diabetic foot according to claim 8, characterized in that, The substrate is provided with a storage cavity and a storage tank. The motor is located inside the storage cavity. The substrate is detachably connected with a cover plate for opening and / or closing the storage cavity. The pressure reducing plate is located inside the storage tank.

10. A foot decompression device for diabetic foot according to claim 9, characterized in that, The foot pressure relief device is provided in pairs, and the pair of foot pressure relief devices are connected by an adjusting connector.

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