An orthosis for hallux valgus correction

Abstract

The utility model provides a corrector for toe out correction, including sole fixed part, toe fixed part and the adjusting mechanism of toe fixed part out angle of adjustment, the adjusting mechanism includes the swivel frame, toe fixed part is connected with the swivel frame movably, is equipped with the first helical gear of transmission cooperation or integral type structure with toe fixed part on toe fixed part, still be equipped with the second helical gear of meshing with the first helical gear on the swivel frame, still include the power mechanism of driving and locking second helical gear rotation, drive second helical gear through power mechanism and drive the first helical gear and whole toe fixed part rotation. The utility model discloses the beneficial effect is: the utility model designs transmission structure between two helical gears for adjusting assembly, adjusts the angle of thumb toe out through controlling whether one of helical gears rotates, and this structure is simple, assembles fast, can all set up plastic piece, and the cost is low.

Description

Technical Field

[0001] This utility model belongs to the field of orthotics technology, specifically an orthotics for correcting hallux valgus. Background Technology

[0002] Hallux valgus correctors are devices used to correct the outward tilt of the big toe of a patient's foot. For example, a hallux valgus corrector disclosed in announcement number CN212438973U mainly includes a metatarsal support, a big toe support, a joint connector, and an adjustment component. The adjustment component is designed with a rotating buckle structure. During installation, steel wire ropes need to be passed through the guide sleeves on the big toe support in sequence, which makes installation inconvenient, inefficient, and the rotating buckle is expensive. Utility Model Content

[0003] The technical problem to be solved by this utility model is how to design the structure of a hallux valgus corrector to improve installation speed and reduce cost while ensuring the same function.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An orthosis for correcting bunions includes a foot fixing part, a toe fixing part, and an adjustment mechanism for adjusting the outward angle of the toe fixing part. The adjustment mechanism includes a rotating frame, the toe fixing part is movably connected to the rotating frame, a first helical gear is provided on the toe fixing part for transmission cooperation or as an integral structure, a second helical gear is provided on the rotating frame for meshing with the first helical gear, and a power mechanism for driving and locking the rotation of the second helical gear is also included. The power mechanism drives the second helical gear to drive the first helical gear and the entire toe fixing part to rotate.

[0006] Preferably, the power mechanism includes a spur pin that is connected to the second helical gear and has a first engaging portion on its exterior, and a knob connected to the spur pin by fasteners. The rotating frame has a boss protruding towards the knob, and a second engaging portion is provided outside the boss. The knob has a third engaging portion and a fourth engaging portion that engage with the first engaging portion and the second engaging portion respectively. The third engaging portion is axially movable and circumferentially restricted after engaging with the first engaging portion. The fourth engaging portion is axially movable and circumferentially restricted after engaging with the second engaging portion. The axial movement distance of the knob is greater than the engagement length between the third engaging portion and the first engaging portion and less than the engagement length between the fourth engaging portion and the second engaging portion, so that when the knob is pulled out, the knob disengages from the rotating frame and the knob remains engaged with the spur pin.

[0007] Preferably, the power mechanism includes a first engaging portion located outside the second helical gear, the second helical gear mounting portion passing through the rotating frame, the first engaging portion located at the end of the passing portion, and a knob connected to the second helical gear by fasteners. The rotating frame has a boss protruding towards the knob, and a second engaging portion is located outside the boss. The knob has a third engaging portion and a fourth engaging portion that engage with the first engaging portion and the second engaging portion respectively. The third engaging portion is axially movable and circumferentially restricted after engaging with the first engaging portion, and the fourth engaging portion is axially movable and circumferentially restricted after engaging with the second engaging portion. The axial movement distance of the knob is greater than the engagement length between the third engaging portion and the first engaging portion and less than the engagement length between the fourth engaging portion and the second engaging portion, so that when the knob is pulled out, the knob disengages from the rotating frame while the knob remains engaged with the spur pin.

[0008] Preferably, the first snap-fit ​​portion, the second snap-fit ​​portion, the third snap-fit ​​portion, and the fourth snap-fit ​​portion are all ribs arranged at axial intervals.

[0009] Preferably, the foot fixing part includes a foot fixing frame and a foot fixing strap, and the rotating frame is movably connected to the foot fixing frame through a first pin.

[0010] Preferably, the toe fixing part includes an adjustment frame and a toe fixing strap. The adjustment frame is movably connected to the rotating frame via a second pin, and the second pin and the first pin are installed in a perpendicular direction.

[0011] Preferably, a snap-fit ​​structure is provided between the first helical gear and the adjusting frame, and the first helical gear and the adjusting frame are driven and engaged through the snap-fit ​​mechanism.

[0012] Preferably, the rotating frame has an opening for installation, and a cap is fastened to the opening. The cap has a slot for adjusting the frame's movement.

[0013] The beneficial effects of this utility model are: the adjustment component is designed as a transmission structure between two helical gears. The angle of hallux valgus is adjusted by controlling whether one of the helical gears rotates. The structure is simple, quick to assemble, and can be made of plastic parts, resulting in low cost. Attached Figure Description

[0014] Figure 1 This is an exploded view of the structure of this utility model;

[0015] Figure 2 This is a perspective view of the present utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the rotating frame of this utility model;

[0017] Figure 4 This is a cross-sectional view of the present invention;

[0018] Figure 5 This is a schematic diagram of the structure of the knob of this utility model;

[0019] Figure 6 This is a schematic diagram of the structure of the adjustment frame of this utility model;

[0020] Figure 7 This is a schematic diagram of the straight toothed pin of this utility model;

[0021] Figure 8 This is a schematic diagram of the structure of the first helical gear of this utility model;

[0022] Figure 9 This is a schematic diagram of the internal structure of this utility model;

[0023] Figure 10 This is a schematic diagram of the structure of the cap of this utility model.

[0024] Reference numerals: 1. Thumb strap; 2. Toe retaining strap; 3. Foot retaining strap; 4. Rear support strap; 5. First pin; 6. Foot retaining bracket; 7. Rotating bracket; 71. Boss; 72. Second locking part; 8. Second helical gear; 9. Washer; 10. Straight tooth pin; 101. First locking part; 11. Knob; 111. Third locking part; 112. Fourth locking part; 12. Fastener; 13. First helical gear; 14. Adjusting bracket; 15. Second pin; 16. Cap; 161. Slot. Detailed Implementation

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

[0026] Example 1

[0027] Please see Figures 1-10The figure shows an orthosis for correcting bunions, including a foot fixing part, a toe fixing part, and an adjustment mechanism for adjusting the outward angle of the toe fixing part. The foot fixing part includes a foot fixing frame 6, a foot fixing strap 3, and a rear support strap 4. One end of the rear support strap 4 is connected to the middle of the foot fixing strap 3, and the other end is connected to the rear end of the foot fixing frame 6. The toe fixing part includes an adjustment frame 14, a toe fixing strap 2, and a thumb pull strap 1. One end of the thumb pull strap 1 is connected to the middle of the toe fixing strap 2, and the other end is connected to the front end of the adjustment frame 14. Notably, in this embodiment, the adjustment mechanism includes a rotating frame 7, which is movably connected to the foot fixing frame 6 of the foot fixing part via a first pin 5. The adjustment frame 14 of the toe fixing part is movably connected to the rotating frame 7 via a second pin 15, and the second pin 15 and the first pin 5 are installed perpendicularly. In this embodiment, the adjustment frame 14 is provided with a first helical gear 13 that is either in transmission cooperation with the adjustment frame 14 or is an integral structure therein. The rotating frame 7 is also provided with a second helical gear 8 that meshes with the first helical gear 13. A power mechanism is also included to drive and lock the rotation of the second helical gear 8. The power mechanism drives the second helical gear 8 to drive the first helical gear 13 and the entire toe fixing part to rotate. This embodiment uses a helical gear drive mechanism to adjust the hallux valgus angle, making the internal structure simpler and assembly faster. Furthermore, the parts can all be made of plastic, avoiding the easily damaged situation caused by friction between steel wire ropes and plastic parts as in the prior art.

[0028] In this embodiment, the power mechanism includes a spur pin 10 that is connected to the second helical gear 8 and has a first engaging portion 101 externally. A washer 9 is also provided between the spur pin 10 and the rotating frame. The mechanism also includes a knob 11 connected to the spur pin 10 via a fastener 12. The rotating frame 7 has a boss 71 protruding towards the knob 11, and a second engaging portion 72 is provided outside the boss 71. The knob 11 has a third engaging portion 111 and a fourth engaging portion 112 that engage with the first engaging portion 101 and the second engaging portion 72, respectively. After engaging with the first engaging part 101, the locking part 111 is axially movable but circumferentially restricted in rotation. After engaging with the second engaging part 72, the fourth engaging part 112 is axially movable but circumferentially restricted in rotation. The axial movement distance of the knob 11 is greater than the engagement length between the third engaging part 111 and the first engaging part 101, but less than the engagement length between the fourth engaging part 112 and the second engaging part 72. This ensures that when the knob 11 is pulled out, it disengages from the rotating frame 7 while maintaining engagement with the straight tooth pin 10. In this embodiment, the knob 11 has an adjustment state and a normal state. The knob 11 has two states: a normal state and an adjustment state. In the normal state, the third locking part 111 is always engaged with the first locking part 101. In the normal state, the fourth locking part 112 of the knob 11 is engaged with the second locking part 72 on the rotating frame 7. At this time, the knob 11 cannot rotate, and neither the first helical gear 13 nor the second helical gear 8 can rotate, thus locking the adjustment frame 14. When the knob 11 is in the adjustment state, the fourth locking part 112 of the knob 11 disengages from the second locking part 72 on the rotating frame 7. At this time, rotating the knob 11 allows the adjustment frame to be engaged with the first locking part 101. The toothed pin 10 engages with and drives the second helical gear 8 to rotate, which in turn drives the first helical gear 13 to rotate, thereby realizing the angle adjustment of the adjustment frame 14. The switching between the two states of the knob 11 is achieved by axially pushing and pulling the knob 11. In order to keep the knob 11 in the normal state, a spring can be provided between the fastener 12 and the knob 11. The spring is sleeved on the outside of the fastener 12, and the cap at the end of the fastener 12 abuts against one end of the spring, while the other end of the spring abuts against the knob 11. The spring always applies a force to the knob 11 toward the rotating frame 7.

[0029] In this embodiment, the first snap-fit ​​part 101, the second snap-fit ​​part 72, the third snap-fit ​​part 111 and the fourth snap-fit ​​part 112 are all ribs arranged axially at intervals, and a gap is formed between two adjacent ribs. The ribs of the parts that cooperate with them are snapped into the gap to form a structure that restricts circumferential rotation.

[0030] In order to enable transmission between the first helical gear 13 and the adjusting frame 14, this embodiment provides a snap-fit ​​structure between the first helical gear 13 and the adjusting frame 14, and the first helical gear 13 and the adjusting frame 14 are transmitted and engaged through this snap-fit ​​mechanism.

[0031] In this embodiment, the rotating frame 7 is provided with an opening for installation. A cap 16 is fastened to the opening. The cap 16 is provided with a slot 161 for the adjustment frame 14 to move. Helical gears and other components are inserted from the opening. The fastening structure between the cap 16 and the rotating frame 7 is a common fastening structure, which belongs to the prior art and will not be described in detail here. The slot 161 is provided so that the adjustment frame 14 can rotate normally.

[0032] Example 2

[0033] The difference between this embodiment and embodiment one is that: in this embodiment, a first snap-fit ​​part 101 is directly provided on the outside of the second helical gear 8, and the mounting part of the second helical gear 8 is provided through the rotating frame 7. The first snap-fit ​​part 101 is provided at the end of the through part, that is, the spur pin 10 and the second helical gear 8 in embodiment one are integrated into one structure.

Claims

1. A corrective device for hallux valgus correction, comprising a foot fixing part, a toe fixing part, and an adjustment mechanism for adjusting the hallux valgus angle of the toe fixing part, characterized in that: The adjustment mechanism includes a rotating frame (7), a toe fixing part is movably connected to the rotating frame (7), a first helical gear (13) is provided on the toe fixing part for transmission cooperation or an integral structure with the toe fixing part, a second helical gear (8) is also provided on the rotating frame (7) for meshing with the first helical gear (13), and a power mechanism for driving and locking the rotation of the second helical gear (8). The power mechanism drives the second helical gear (8) to drive the first helical gear (13) and the entire toe fixing part to rotate.

2. The orthosis for correction of toe out according to claim 1, characterized in that: The power mechanism includes a spur pin (10) that is connected to the second helical gear (8) and has a first engaging portion (101) on its exterior. It also includes a knob (11) connected to the spur pin (10) by a fastener (12). The rotating frame (7) has a boss (71) protruding towards the knob (11). A second engaging portion (72) is located outside the boss (71). The knob (11) has a third engaging portion (111) and a fourth engaging portion (112) that engage with the first engaging portion (101) and the second engaging portion (72), respectively. (111) After engaging with the first engaging part (101), it is axially movable and circumferentially restricted. After engaging with the second engaging part (72), it is axially movable and circumferentially restricted. The axial movement distance of the knob (11) is greater than the engagement length between the third engaging part (111) and the first engaging part (101) and less than the engagement length between the fourth engaging part (112) and the second engaging part (72), so that when the knob (11) is pulled out, the knob (11) disengages from the rotating frame (7) and the knob (11) remains engaged with the straight tooth pin (10).

3. The orthosis for correction of toe out according to claim 1, characterized in that: The power mechanism includes a first engaging portion (101) located outside the second helical gear (8). The mounting portion of the second helical gear (8) passes through the rotating frame (7). The first engaging portion (101) is located at the end of the through portion. It also includes a knob (11) connected to the second helical gear (8) by a fastener (12). The rotating frame (7) has a boss (71) protruding towards the knob (11). A second engaging portion (72) is located outside the boss (71). The knob (11) has a third engaging portion (111) and a fourth engaging portion (12) that engage with the first engaging portion (101) and the second engaging portion (72) respectively. The locking part (112) is axially movable and circumferentially restricted after the third locking part (111) is locked with the first locking part (101), and the fourth locking part (112) is axially movable and circumferentially restricted after the second locking part (72) is locked. The axial movement distance of the knob (11) is greater than the locking length between the third locking part (111) and the first locking part (101) and less than the locking length between the fourth locking part (112) and the second locking part (72), so that when the knob (11) is pulled out, the knob (11) is disengaged from the rotating frame (7) and the knob (11) is locked with the straight tooth pin (10).

4. An orthosis for correcting toe out as claimed in claim 2 or 3, wherein: The first snap-fit ​​part (101), the second snap-fit ​​part (72), the third snap-fit ​​part (111) and the fourth snap-fit ​​part (112) are all ribs arranged at axial intervals.

5. An orthosis for correcting toe out as claimed in claim 2 or 3, wherein: The foot fixing part includes a foot fixing frame (6) and a foot fixing strap (3), and the rotating frame (7) is movably connected to the foot fixing frame (6) through a first pin (5).

6. An orthosis for correcting toe out as claimed in claim 5, wherein: The toe fixing part includes an adjustment frame (14) and a toe fixing strap (2). The adjustment frame (14) is movably connected to the rotating frame (7) through a second pin (15), and the second pin (15) and the first pin (5) are installed in a perpendicular direction.

7. The orthotic device for correcting hallux valgus as described in claim 6, characterized in that: A snap-fit ​​structure is provided between the first helical gear (13) and the adjustment frame (14), and the first helical gear (13) and the adjustment frame (14) are driven and engaged through the snap-fit ​​mechanism.

8. The orthosis for correction of toe out according to claim 6, characterized in that: The rotating frame (7) is provided with an opening for installation, and a cap (16) is fastened to the opening. The cap (16) is provided with a slot (161) for the adjustment frame (14) to move.

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