Magnetic lock for prosthetic silicone sleeve

Abstract

This invention relates to the field of prosthetic fixation technology, specifically providing a magnetic lock for a silicone prosthesis sleeve. It includes an upper shell, an outer ring shell fixed to the lower part of the upper shell, and a notch in the outer ring shell. A rotatable circular magnet fixing seat is fastened inside the outer ring shell. The magnet fixing seat contains four tangent cylindrical magnets: a first magnet, a second magnet, a third magnet, and a fourth magnet. The upper surfaces of the first and second magnets have the same magnetic poles, as do the upper surfaces of the third and fourth magnets. A switch on the side of the magnet fixing seat allows it to rotate. The outer ring shell is fixedly connected to the lower shell. A resistive magnetic tape passing through the midpoint of the upper shell is located within the upper shell. By changing the relative position of the resistive magnetic tape and the magnetic lines of force by actuating the switch, the magnetic force of the lock is altered. This invention uses magnetic force to suspend and install the prosthesis, making it more convenient to use.

Description

Technical Field

[0001] This invention relates to the field of prosthetic fixation technology, and more particularly to a magnetic lock for a silicone prosthesis sleeve. Background Technology

[0002] With the development of modern medical rehabilitation engineering science and technology and the improvement of people's living standards, more and more people with limb loss or amputation are choosing to wear prostheses to restore a certain degree of self-care and work ability. When using a prosthesis, the patient mainly relies on the socket to wear the prosthesis. The prosthesis needs to be fixed to a silicone sleeve, and the residual limb is wrapped in the socket to ensure complete contact between the residual limb and the socket. However, the installation and removal are relatively troublesome and inconvenient to use. Summary of the Invention

[0003] To address the problems of cumbersome installation and disassembly and inconvenience in existing technologies, this invention proposes a magnetic lock for a prosthetic silicone sleeve, comprising an upper shell and an outer ring shell fixed to the lower part of the upper shell. The outer ring shell has a notch, and a rotatable circular magnet holder is fastened inside the outer ring shell. The magnet holder contains four tangent cylindrical magnets: a first magnet, a second magnet, a third magnet, and a fourth magnet. The first and second magnets have the same magnetic poles on their upper surfaces, as do the third and fourth magnets. The first and third magnets have different magnetic poles on their upper surfaces. A switch is located on the side of the magnet holder, allowing it to rotate. The outer ring shell is fixedly connected to the lower shell. A resistive magnetic tape passing through the midpoint of the upper shell is located within the upper shell. By changing the relative position of the resistive magnetic tape and the magnetic field lines by actuating the switch, the magnetic force of the magnetic lock is altered.

[0004] Furthermore, the lower shell, outer ring shell 2, and upper shell are perfectly matched in shape, and can be various shapes such as circles and squares.

[0005] Furthermore, the upper surface of the upper shell is provided with a multi-layered recessed structure from the periphery to the center, in a stepped recessed shape. Between each layer of recesses, there is an annular protrusion that decreases layer by layer from the outside to the inside. Two adjacent annular protrusions surround the gradually decreasing upper surface to form an annular groove. The annular protrusions have a certain curvature pointing towards the center of the circle.

[0006] Furthermore, the fixed end has an umbrella-shaped structure, with one end connected to the prosthesis sleeve by a thread. Its outer surface has a certain curvature, and its shape matches the shape of the annular protrusion on the upper surface of the upper shell.

[0007] Furthermore, the diameter of the fixed end is not less than half the diameter of the upper housing, nor is it greater than the diameter of the upper housing.

[0008] Furthermore, the position of the resistive magnetic tape coincides with the tangent positions of the pairs of tangent circles in the magnet holder.

[0009] Furthermore, the outer ring shell is provided with a notch that allows the magnet holder to rotate 45°-120°.

[0010] Furthermore, a cross-shaped groove is provided on the lower surface of the upper shell.

[0011] Furthermore, the lower part of the upper housing and the upper part of the lower housing are both coated with lubricant.

[0012] Furthermore, the resistive magnetic tape is made of non-magnetic metals such as aluminum and copper and is welded into the upper housing.

[0013] The beneficial effects of this invention are:

[0014] 1. This invention uses a magnetic lock to suspend and install the prosthesis using magnetic force. By changing the magnetic force of the lock by turning a switch, the silicone sleeve can be separated from the prosthesis. It can be used multiple times and is more convenient to use.

[0015] 2. The shape of the magnetic lock of this invention matches the prosthesis sockets in China and abroad, and can be adapted to existing prosthesis structures on the market without affecting the patient's choice of overall prosthesis.

[0016] 3. Compared with traditional bolt-type locks, the height of the magnetic lock of the present invention is only half that of the traditional bolt-type lock structure, which reduces the height of the entire prosthesis structure cavity, reduces the weight of the prosthesis, and reduces the burden on the patient. Attached Figure Description

[0017] Figure 1 This is an overall structural diagram of the magnetic lock on the silicone sleeve of the prosthesis of the present invention;

[0018] Figure 2 This is a diagram of the internal structure of the magnetic lock on the silicone sleeve of the prosthesis of the present invention;

[0019] Figure 3 This is a plan view of the lower surface of the upper shell of the magnetic lock for the silicone sleeve of the prosthesis of the present invention;

[0020] Figure 4 This is a structural diagram of the magnetic lock fixing end of the silicone sleeve for prosthesis of the present invention;

[0021] Figure 5 This is a schematic diagram of the magnetic locking magnet fixing base of the prosthetic silicone sleeve of the present invention before rotation;

[0022] Figure 6 This is a schematic diagram of the magnetic lock magnet fixing base of the prosthetic silicone sleeve of the present invention rotated 45°;

[0023] Figure 7 This is a schematic diagram of the magnetic lock magnet fixing base of the prosthesis silicone sleeve of the present invention rotated 90°.

[0024] 1. Upper housing; 2. Outer ring housing; 3. Lower housing; 4. Magnet fixing base; 5. First magnet; 6. Second magnet; 7. Third magnet; 8. Fourth magnet; 9. Switch; 10. Cross-shaped groove; 11. Annular groove; 12. Annular protrusion; 13. Blocking tape; 14. Fixing end; 15. Arc groove. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that in the description of this invention, the terms "upper," "lower," "top," "bottom," "front," "rear," "left," "right," "inner," and "outer," etc., indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or component must have a specific orientation or must be constructed and operated in a specific orientation; therefore, it should not be construed as a limitation of this invention. Furthermore, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, "linked" can refer to a detachable connection or an integral connection; it can be a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] like Figures 1-4 As shown, a magnetic lock for a silicone prosthesis includes an upper shell 1 and an outer ring shell 2 with a notch fixed to the lower part of the upper shell 1. The inner side of the outer ring shell 2 is circular, and a rotatable magnet fixing seat 4 is fastened inside the outer ring shell 2. The magnet fixing seat 4 is circular and has four through holes. Four magnets of the same size, namely a first magnet 5, a second magnet 6, a third magnet 7, and a fourth magnet 8, are installed in the through holes. A switch that can drive the magnet fixing seat 4 to rotate is provided on the outside of the magnet fixing seat 4. A lower shell 3 is fixedly connected to the lower part of the outer ring shell 2. The lower shell 3, the outer ring shell 2, and the upper shell 1 are perfectly matched in shape and can be circular, square, or other shapes. It is preferably square, which matches the shape commonly used in prosthesis sockets both domestically and internationally.

[0029] Specifically, the upper surface of the upper shell has a multi-layered recessed structure extending from the periphery to the center, forming a stepped recessed shape. Between each layer of recesses are progressively lowering annular protrusions 12. Two adjacent annular protrusions 12 surround the progressively lowering upper surface of the upper shell, forming annular grooves 11. The annular protrusions 12 have a certain curvature pointing towards the center. Through the design of multiple annular grooves 11 and multiple annular protrusions 12, a higher magnetic field is generated at the edges and corners of the upper shell 1, resulting in stronger magnetic force compared to planar or curved surface designs. The lower part of the upper shell has a star-shaped groove 10, the midpoint of which coincides with the midpoint of the upper shell 1. Magnetic field lines leak out from both sides of the star-shaped groove 10, forming equal magnetic poles of opposite polarity, further enhancing the magnetic force of the upper shell 1. Lubricant is applied to the star-shaped groove 10 to facilitate smoother rotation of the magnet within the upper shell 1. A resistive magnetic tape 13 is welded into the upper housing 1. The resistive magnetic tape 13 is made of high-purity non-magnetic metals such as copper or aluminum. The resistive magnetic tape 13 passes through the midpoint of the upper housing 1, and the upper housing 1 on both sides of the resistive magnetic tape 13 has the same shape and volume. The width of the resistive magnetic tape 13 is 1mm-4mm. It blocks the magnetic field lines of the magnet in the magnet holder 4 in the direction of upward movement towards the upper housing 1, thereby increasing the magnetic resistance.

[0030] Specifically, a fixed end 14 is threadedly connected to the silicone sleeve of the prosthesis. The fixed end 14 is made of magnetically conductive metal material and has an umbrella-like structure. One end of the fixed end 14 is provided with an external thread for fixing the magnetic lock to the silicone sleeve of the prosthesis. The shape of the other end matches the shape of the annular protrusion 12 on the upper surface of the upper shell and also has a certain curvature. The curvature matches the curvature of the annular protrusion 12, so that the fixed end 14 can slide smoothly on the annular protrusion 12, reducing the wear between the annular protrusion 12 and the fixed end 14. During adsorption, the fixed end 14 can completely fit on the annular protrusion 12. To ensure the adsorption effect, the diameter of the fixed end 14 is not less than 1 / 2 of the diameter of the upper shell 1, and also not more than the diameter of the upper shell 1. When the diameter of the fixed end 14 is less than half the diameter of the upper shell 1, the adsorption area is too small, and the magnetic force is insufficient to support the movement of the prosthesis. When the diameter of the fixed end 14 is greater than the diameter of the upper shell 1, the magnetic force at the edge is insufficient to completely adsorb the fixed end 14, making it more prone to slippage. Furthermore, the fixed end 14 is made of a magnetically conductive metal material, making it heavy and causing additional burden on the patient. Optimally, the fixed end 14 and the magnet fixing base 4 have the same radius, allowing the fixing part to be more firmly adsorbed onto the upper surface of the upper shell 1.

[0031] Specifically, the magnetic lock has an outer ring shell 2 in the middle, which is fixed in the upper shell 1 and the lower shell 3. The outer ring shell 2 is an annular shape with a notch on one side, and its external shape matches the shape of the upper and lower shells. The inside of the outer ring shell 2 is circular, and the magnet fixing seat 4 is fastened inside the outer ring shell 2. Its size and height match the inside of the outer ring shell 2, and it can rotate within the outer ring shell 2. The magnet fixing seat 4 has four through holes of the same size, preferably two tangent circles, which has a large space utilization rate. The position of the blocking tape 13 coincides with the tangent of the two tangent circles. The side wall of the magnet fixing seat 4 has a threaded hole, and the switch 9 is threadedly connected to the magnet fixing seat 4. The rotation of the magnet fixing seat 4 relative to the upper shell 1 and the lower shell 3 can be achieved by toggling the switch 9. The outer ring shell 2, the magnet fixing seat 4, and the switch 9 are all made of non-magnetic metal. The first magnet 5, the second magnet 6, the third magnet 7, and the fourth magnet 8 are cylindrical magnets embedded in the through holes of the magnet holder 4. The upper surfaces of the first magnet 5 and the second magnet 6 have the same magnetic poles, and the upper surfaces of the third magnet 7 and the fourth magnet 8 have the same magnetic poles. The upper surfaces of the first magnet 5 and the third magnet 7 have different magnetic poles, and the upper surfaces of the second magnet 6 and the fourth magnet 8 have different magnetic poles. The first magnet 5 and the second magnet 6 are located on one side of the resistive magnetic tape 13, and the third magnet 7 and the fourth magnet 8 are located on the other side of the resistive magnetic tape 13. Strong magnets are used, preferably sintered neodymium iron boron magnets.

[0032] Specifically, switch 9 is threaded onto the outer surface of magnet holder 4. Switch 9 is made of non-magnetic material. A protrusion is provided on the upper part of switch 9. An arc-shaped groove 15 is provided on the lower surface of the upper housing at the notch of the outer ring shell 2. The size of the protrusion matches the arc-shaped groove 15 on the lower surface of the upper housing. A spring is provided inside switch 9, which can slide on the upper surface of the upper housing by pressing switch 9. The switch can rotate magnet holder clockwise or counterclockwise.

[0033] Specifically, such as Figure 5-7As shown (the double vertical lines in the figure represent the projection of the resistive magnetic tape onto the magnet holder), when switch 9 is not activated, the first magnet 5 and the second magnet 6 are positioned on one side of the resistive magnetic tape 13, and the third magnet 7 and the fourth magnet 8 are positioned on the other side. At this time, the resistive magnetic tape 13 blocks the magnetic force between the first magnet 5 and the second magnet 6, as well as the magnetic force between the third magnet 7 and the fourth magnet 8, greatly increasing the magnetic reluctance of the magnetic field lines from the N to the S order. The magnetic force of the upper housing 1 is strongest at this point. When switch 9 is rotated 45°, the resistive magnetic tape 13 passes through the first magnet 5 and the third magnet 7. The resistive magnetic tape 13 blocks part of the magnetic force between the first magnet 5 and the fourth magnet 8, and also blocks part of the magnetic force between the second magnet 6 and the fourth magnet 8. At this time, the magnetic force of the upper housing 1 is weakened compared to when switch 9 is not activated. When the toggle switch 9 is rotated 90°, the first magnet 5 and the fourth magnet 8 are positioned on one side of the resistive magnetic tape 13, and the second magnet 6 and the third magnet 7 are positioned on the other side. At this time, the resistive magnetic tape 13 blocks the magnetic force between the first magnet 5 and the second magnet 6, and also blocks the magnetic force between the third magnet 7 and the fourth magnet 8, thus blocking the magnetic field lines generated between the two S poles and the two N poles. The magnetic force of the upper housing 1 is weakest at this time. When the toggle switch 9 is rotated 135°, the situation is the same as when the toggle switch 9 is rotated 45°; the magnetic force of the upper housing 1 is weakened compared to when the switch 9 is not rotated. When the toggle switch 9 is rotated 180°, the situation is the same as when the switch 9 is not rotated; the magnetic force of the upper housing 1 is strongest at this time. Therefore, the outer ring shell 2 is provided with a notch that allows the magnet fixing seat 4 to rotate 45°-120°. By rotating the switch 9, the relative position of the resistive tape 13 and the magnetic field lines is changed, thereby changing the magnetic force on the outer surface of the upper shell 1. This makes it easier for the fixing end 14, which is attached to the outer surface of the upper shell 1, to be locked and removed by rotation.

[0034] Specifically, the lower housing 3 of the magnetic lock is provided with multiple threaded grooves. The size and depth of the threaded grooves match the threads of domestic and international prosthetic sockets. The threaded grooves penetrate the outer ring shell 2 and partially extend into the bottom surface of the upper housing 1, so that the magnetic lock is completely fixed in the prosthetic socket. The interior of the lower housing 3 of the magnetic lock is provided with a circular groove, which is coated with lubricant to make the rotation of the magnet in the lower housing 3 smoother. Of course, those skilled in the art will understand that lubricant is coated in the cross-shaped groove 10 in the lower part of the upper housing 1 and in the circular groove in the upper part of the lower housing 3. Alternatively, lubricant can be coated on the upper and lower parts of the magnet fixing seat 4 and the first magnet 5, the second magnet 6, the third magnet 7, and the fourth magnet 8.

[0035] In use, the magnetic lock is installed in the prosthesis fixation cavity through the threaded groove of the lower housing 3. The fixing end 14 is installed at the end of the prosthesis silicone sleeve. The upper housing 1, outer ring housing 2, and lower housing 3 are fixed together, and the fixing end 14 is tightly attracted to the upper surface of the upper housing 1 by magnetic force. When it is necessary to separate the prosthesis from the prosthesis silicone sleeve, the toggle switch 9 rotates the magnet fixing base 4. The first magnet 5, second magnet 6, third magnet 7, and fourth magnet 8 in the magnet fixing base 4 rotate relative to the upper housing 1. By changing the relative position of the resistive tape 13 and the magnetic field lines by toggle switch 9, the magnetic force of the magnetic lock is weakened, so that the prosthesis silicone sleeve can be easily removed from the magnetic lock installed in the prosthesis fixation cavity.

[0036] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A magnetic lock for a silicone prosthesis sleeve, characterized in that: The device includes an upper housing (1) and an outer ring shell (2) fixed to the lower part of the upper housing (1). The outer ring shell (2) has a notch, and a rotatable circular magnet fixing seat (4) is fastened inside the outer ring shell (2). The magnet fixing seat (4) is provided with two tangent cylindrical first magnet (5), second magnet (6), third magnet (7), and fourth magnet (8). The magnetic poles on the upper surfaces of the first magnet (5) and the second magnet (6) are the same, the magnetic poles on the upper surfaces of the third magnet (7) and the fourth magnet (8) are the same, the magnetic poles on the upper surfaces of the first magnet (5) and the third magnet (7) are different, and the magnetic poles on the upper surfaces of the second magnet (6) and the fourth magnet (8) are different. The magnet fixing seat (4) has a rotatable circular magnet fixing seat (4) on its side. The magnet fixing base (4) is rotated by the switch (9). The outer ring shell (2) is fixedly connected to the lower shell (3). The upper shell (1) is provided with a resistive magnetic tape (13) passing through the midpoint of the upper shell (1). By turning the switch (9), the relative position of the resistive magnetic tape (13) and the magnetic field lines is changed, thereby changing the magnetic force of the magnetic lock. The lower surface of the upper shell (1) is provided with a cross-shaped groove (10). The interior of the lower shell (3) is provided with a circular groove. The cross-shaped groove (10) and the circular groove are coated with lubricant. The midpoint of the cross-shaped groove (10) coincides with the midpoint of the upper shell (1). Magnetic field lines leak out on both sides of the cross-shaped groove (10), forming equal magnetic poles with opposite polarities, thereby enhancing the magnetic force of the upper shell (1).

2. The magnetic lock for the silicone sleeve of the prosthesis according to claim 1, characterized in that: The lower shell (3), outer ring shell (2) and upper shell (1) are perfectly matched in shape and are square.

3. The magnetic lock for the silicone sleeve of the prosthesis according to claim 1, characterized in that: The upper surface of the upper shell (1) is provided with a multi-layered recessed structure from the periphery to the center, which is in the form of a stepped recess. Between each layer of recess, there is a ring protrusion (12) that decreases from the outside to the inside. Two adjacent ring protrusions (12) surround the gradually decreasing upper surface to form a ring groove (11). The ring protrusion (12) has an arc pointing towards the center.

4. The magnetic lock for the silicone sleeve of the prosthesis according to claim 3, characterized in that: The fixed end (14) is an umbrella-shaped structure. One end of the fixed end (14) is connected to the prosthesis sleeve by a thread. The curvature and shape of its outer surface match the shape of the annular protrusion (12) on the upper surface of the upper shell (1).

5. The magnetic lock for the silicone sleeve of the prosthesis according to claim 4, characterized in that: The diameter of the fixed end (14) is not less than half the diameter of the upper shell (1), and not more than the diameter of the upper shell (1).

6. The magnetic lock for a prosthetic silicone sleeve according to claim 1, characterized in that: The position of the resistive magnetic tape (13) coincides with the position of the tangent of the two tangent circles in the magnet holder (4).

7. The magnetic lock for a prosthetic silicone sleeve according to claim 1, characterized in that: The outer ring shell (2) is provided with a notch that allows the magnet fixing seat (4) to rotate 45°-120°.

8. The magnetic lock for the silicone sleeve of the prosthesis according to claim 1, characterized in that: The resistive magnetic tape (13) is made of non-magnetic metal and is welded into the upper housing (1).

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