CN102885662B - Continuous flexible toe joint based on whole sole - Google Patents

Abstract

The invention relates to a continuous flexible toe joint based on a whole sole. The continuous flexible toe joint comprises a motor fixedly connected to the whole sole, the output end of the motor is connected with a connecting rod through a sliding pair, and the other end of the connecting rod is fixedly connected with a pressing block. The continuous flexible toe joint has the advantages of high movement coherence, capability of being independently installed or replaced and capability of providing continuous flexible power for movement of a shank of a user, and can be widely applied to various prosthetic feet.

Description

A continuous flexible toe joint based on the whole foot

technical field

The invention relates to a below-knee prosthesis, in particular to a continuous flexible toe joint based on an integral foot plate.

Background technique

With the increase of various natural disasters, diseases and traffic accidents, the number of disabled people is increasing year by year, and the demand for artificial limbs is also increasing. The toe joint is the most active part of the human body, and it is also the main stress-bearing part during exercise. It is especially the first part to touch the ground when the human body falls to the ground. flexible power. If the below-knee prosthesis used by the disabled does not have toe joints, the disabled will not only be unable to perform many actions during exercise, but also have an uncoordinated and natural gait, which also reduces energy efficiency during walking. In order to improve energy efficiency during exercise and increase the variety and naturalness of exercise, below-knee prosthetics with toe joints have become new demands of users. The current below-the-knee prosthesis with toe joints is a toe joint based on the disconnected sole of the foot and the toe, and this disconnected structure of the foot plate makes the continuity of movement not good enough.

In view of the above problems, the applicant provides an integral foot plate 1 (an invention patent has been applied for at the same time), as shown in Figure 3, the integral foot plate 1 includes an upper foot plate 11 which is inclined, and the middle part of the upper foot plate 11 has a lower The bow is raised, and a heel spring 12 is set below the upper foot plate 11, and the front portion of the heel spring 12 is fixedly connected to the middle part of the upper foot plate 11 bottom surface, and an elastic movable space is reserved between the rear portion of the heel spring 12 and the upper foot plate 11. As shown in FIG. 4 , the applicant also provides another integral foot plate 1 , which only includes one foot plate, and the middle part of the foot plate has a higher arch. And how to arrange a toe joint that can separate the movement of sole and toe on the whole foot plate and can provide continuous flexibility for different motion states is a problem to be solved by the present invention.

Contents of the invention

In view of the above problems, the object of the present invention is to provide a continuous flexible toe joint based on the whole foot plate with good movement continuity.

In order to achieve the above object, the present invention adopts the following technical solutions: a continuous flexible toe joint based on the integral foot plate, characterized in that it includes a motor fixedly connected to the integral foot plate, and the output end of the motor is hinged through a sliding pair A connecting rod, the other end of which is fixedly hinged to a pressing block.

The motor is fixedly connected to the integral foot plate through a support.

The shape of the compact is cylindrical or spherical.

The sliding pair includes a screw driven by the motor, a screw nut connected to the screw, and a slider fixedly connected to the screw nut, and the slider is hinged to the connecting rod.

The sliding pair includes a bevel gear driven by the motor, the bevel gear meshes with another bevel gear, the output end of the bevel gear is coaxially connected to a gear, and the gear is connected to a rack connected to the slider engaged, the slider hinges the link.

The output shaft of the motor is installed on the integral foot plate perpendicular to the moving direction of the connecting rod, and the sliding pair includes a gear connected to the output end of the motor, and the gear meshes with a rack connected to the slider , the slider hinges the connecting rod.

The present invention has the following advantages due to the adoption of the above technical scheme: 1. The present invention is provided with a motor on the integral foot plate, and the motor drives a connecting rod through a sliding pair, which can be connected in two extreme support states through the connecting rod. Therefore, the present invention can adjust the different supporting states of the pressing blocks according to the movement state of the human body or the likes and dislikes of the user, and provide the required degree of flexibility for the movement of the calf, thereby making the movement of the user consistent Better, more freedom of movement. 2. In the present invention, a motor as an independent power source is set on the integral foot, by driving the change of the contact point between the briquetting block and the integral foot in the limit state a and b range, that is to say the contact between the toe joint and the integral foot The points are continuous, so that the maximum deformation of the front end of the sole of the whole foot is also different with the position of the pressure block; therefore, it not only realizes continuous flexible power for the user's calf, but also can adapt to the bionic movement of the toe joint of different people need. 3. In the present invention, since the pressing block can move continuously between the two extreme support states, when the pressing block moves to the rear end of the foot plate, the user can feel that the foot plate has better flexibility, and can lift the foot plate more conveniently Moving forward makes the user feel lighter and more comfortable when walking; and when the pressure block moves to the front end of the foot plate, the user will feel the foot plate is harder, so that more movement energy can be stored, and then released in subsequent movements middle. 4. The present invention is very convenient to install or replace because all toe joints including the power source, transmission mechanism and executive mechanism are installed on the whole foot plate as a whole. The invention has the advantages of good movement continuity, independent installation or replacement, and continuous flexible power for the user's calf movement, and can be widely used in various foot prosthetics.

Description of drawings

Fig. 1 is a structural representation of the present invention

Fig. 2 is a schematic diagram of another working state of the present invention

Fig. 3 is a structural schematic diagram of an integral foot plate

Fig. 4 is the structural representation of another kind of whole foot plate

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in Fig. 1 and Fig. 2, the present invention includes a motor 2 fixedly arranged on the integral foot plate 1, the motor 2 drives a threaded screw 4 to rotate through a shaft coupling 3, and a threaded screw nut 5 is connected on the leading screw 4, and the threaded screw The outer ring of the lever nut 5 is fixedly connected with a slide block 6, the slide block 6 is hinged with a connecting rod 7, and the other end of the connecting rod 7 is hinged with a pressure block 8.

In the above embodiment, the motor 2 can be fixedly connected to the integral foot plate 1 through a support 9 .

In the above embodiments, the shape of the pressing block 8 can be cylindrical, spherical or other shapes.

In the above-mentioned embodiment, the motor 2 is used to push the connecting rod 7 to move forward and backward through the sliding pair formed by the lead screw 4, the lead screw nut 5 and the slider 6. The sliding pair can also be a bevel gear driven by the motor 2, the bevel gear meshes with another bevel gear, and the output end of the other bevel gear is coaxially connected with a gear, which meshes with a rack connected to the slide block 6, and the slide Block 6 connects connecting rod 7, and then pushes connecting rod 7 to move forward and backward. The output shaft of the motor 2 and the moving direction of the connecting rod 7 are vertically installed on the integral foot plate 1. At this time, the sliding pair can also be a gear connected to the output end of the motor 2, and the gear meshes with a rack connected to the slide block 6. Block 6 connects connecting rod 7, and then pushes connecting rod 7 to move forward and backward.

When the present invention works, the motor 2 drives the sliding block 6 of the sliding pair to move forward through the shaft coupling 3, and the connecting rod 7 connected to the sliding block 6 pushes the pressure block 8 to move at the front end of the integral foot plate 1, so that the present invention is in the limit state. a and limit state b are continuously varied. As shown in Figure 1, when the present invention works in limit state a, the flexibility of integral foot plate 1 is larger than when working in limit state b, and is suitable for when the user's walking speed is slower; the dotted line in the figure is the front end of integral foot plate 1 in Maximum deformation at limit state a. As shown in Figure 2, when the present invention works in the limit state b, the flexibility of the integral foot plate 1 is smaller than that in the limit state a, and the maximum deformation of the front end of the integral foot plate 1 is also reduced (as shown by the dotted line in the figure), It is suitable for when the user walks faster. That is to say, the contact point between the present invention and the integral foot plate 1 is continuously changed, so that the maximum deformation of the front end of the integral foot plate 1 is also different with the position of the pressure block 8; need.

Above-mentioned each embodiment is only for illustrating the present invention, wherein the structure of each component, connection mode etc. all can be changed to some extent, every equivalent conversion and improvement carried out on the basis of the technical solution of the present invention, all should not be excluded from the present invention. outside the scope of protection of the invention.

Claims (5)

1. the continuous flexible toe joint based on overall sole, is characterized in that: it comprises the motor being fixedly connected on overall sole, and the outfan of described motor is by the hinged connecting rod of a sliding pair, the other end of the described connecting rod briquetting that is fixedly hinged; The shape of described briquetting is cylindrical or spherical; Described connecting rod promotes described briquetting and moves at described overall sole front end, and the described continuous flexible toe joint based on overall sole is changed continuously within the scope of limit state, and the contact point of continuous flexible toe joint and overall sole is continuous.

2. a kind of continuous flexible toe joint based on overall sole as claimed in claim 1, is characterized in that: described motor is fixedly connected on described overall sole by a bearing.

3. a kind of continuous flexible toe joint based on overall sole as claimed in claim 1 or 2, it is characterized in that: described sliding pair comprises the leading screw by described driven by motor, one connects the feed screw nut of described leading screw, one is fixedly connected with the slide block of described feed screw nut, the hinged described connecting rod of described slide block.

4. a kind of continuous flexible toe joint based on overall sole as claimed in claim 1 or 2, it is characterized in that: described sliding pair comprises the bevel gear by described driven by motor, described bevel gear engages another bevel gear, the coaxial gear that connects of the outfan of another bevel gear described in this, described gear engages with the tooth bar of a connection sliding block, the hinged described connecting rod of described slide block.

5. a kind of continuous flexible toe joint based on overall sole as claimed in claim 1 or 2, it is characterized in that: the output shaft of described motor and described link motion direction are vertically arranged on described overall sole, described sliding pair comprises a gear that is connected to described motor output end, described gear engages with the tooth bar of a connection sliding block, the hinged described connecting rod of described slide block.