CN221786691U - Elbow joint steering exerciser - Google Patents

Abstract

The utility model discloses an elbow joint steering exercise device, which comprises: the near-end rod anchoring component comprises an annular connecting piece and a transverse connecting piece integrally connected with the annular connecting piece, a central shaft is fixedly connected in the middle of the annular connecting piece, a worm wheel is sleeved on the central shaft, a hinge piece is fixedly connected on the worm wheel, a far-end rod anchoring component is connected with the hinge piece in an adjustable mode, one end, far away from the worm wheel, of the far-end rod anchoring component is fixedly connected with a second connecting rod, and one end, far away from the annular connecting piece, of the transverse connecting piece is fixedly connected with a first connecting rod. According to the utility model, the exercise machine is light in weight, the cost is greatly reduced, the hinging is effectively realized, and the radiolucence of the central element which is aligned with the joint when the exercise machine is in use is ensured.

Description

Elbow joint steering exerciser

Technical Field

The utility model relates to the technical field of medical equipment, in particular to an elbow joint steering exerciser.

Background Art

Flexion contractures of the joint, due to treatment of trauma to the elbow joint or other causes (inflammation, burns, arthritis), assume a particular clinical importance according to the frequency and degree of damage. In fact, even a mild contracture (about 30°-40°) can significantly reduce the functionality of the upper limb. In many cases, the restoration of mobility after the contracture by reduction or distraction arthroplasty may be limited or prevented by pain and/or swelling in case of shortening of the associated muscles on both sides of the joint.

Some techniques like early active mobilization, general therapy, and continuous passive motion (CPM) can be used to face this problem, but they cannot guarantee in any definitive way that this problem will be solved. Early active mobilization can reduce the gravity of the contracture, but this requires continuous and strenuous persistence by the patient. In general therapy, passive stretching performed with the help of a therapist may lead to heterotopic bone formation and myositis ossificans. Finally, CPM devices allow for a rapid return of mobility, but they do not reach the end of dynamic motion, which is where the greatest recovery is needed.

At present, only some orthopedic devices meet these requirements, with limited effectiveness. In fact, the external fixators on the market are not specifically designed for the restoration of the elbow joint, and therefore they have a series of disadvantages that make them unsuitable for this purpose. The first disadvantage stems from the difficulty of centering and repositioning the external fixator relative to the elbow joint. This centering is hampered by the radiographically invisible fixator components that reduce the visibility of the bone joint and the difficulty in identifying the articulation axis of the device. Another disadvantage stems from the fact that the external fixators on the market do not allow full dynamic movement of the elbow joint associated therewith. Another disadvantage is based on the excessive size and weight of the external elbow fixators known today.

Utility Model Content

In view of the shortcomings of the prior art, the purpose of the present invention is to provide an elbow joint steering exerciser, which is lightweight, greatly reduces the cost and effectively realizes the articulation, ensuring the radiolucency of the central element to be aligned with the joint. In order to achieve the above-mentioned purpose and other advantages according to the present invention, an elbow joint steering exerciser is provided, comprising:

A proximal rod anchoring component, the proximal rod anchoring component comprises an annular connector and a transverse connector integrally connected to the annular connector, a central shaft is fixedly connected to the middle of the annular connector, a worm gear is sleeved on the central shaft, a hinge is fixedly connected to the worm gear, the hinge is adjustably connected to the distal rod anchoring component, a second connecting rod is fixedly connected to one end of the distal rod anchoring component away from the worm gear, and a first connecting rod is fixedly connected to one end of the transverse connector away from the annular connector;

A worm is inserted into the annular connecting piece, and the worm and the transverse connecting piece are both arranged transversely.

Preferably, the structure of the worm wheel is annular, and a gear is arranged on the outer surface of the worm wheel, and the gear is meshed with the gear on the worm.

Preferably, a worm stopper is inserted into the surface of the annular connecting member located at the worm, and the worm stopper is used to adjust the position of the worm.

Preferably, the distal rod anchoring component includes an adjustable connecting section and a fixed connecting section integrally connected to the connecting section, the adjustable connecting section includes two fixed plates arranged parallel to each other, an extension bolt is threadedly connected to the middle portion of the fixed connecting section, and the extension bolt extends between the two fixed plates arranged parallel to each other.

Preferably, a sliding groove is provided on one opposite side of the hinge, the sliding groove matches the fixing plate, and an adjustment hole is provided in the middle portion of the hinge, an adjusting bolt is arranged in the adjustment hole, the adjusting bolt passes through the two fixing plates in sequence, and the extension bolt extends from the fixed connection section to the position of the adjusting bolt and is in conflict with the adjusting bolt.

Compared with the prior art, the utility model has the following beneficial effects: the elbow joint is centered and repositioned through the central axis, hinge, worm and worm gear, and the central axis and the light-transmitting centering window color setting centering are not hindered by the radiographic invisible fixation member that reduces the visibility of the bone joint and the hinge axis of the device that is difficult to identify. By removing the worm, the hinge can be freely rotated around the central axis. The exerciser of the present application is small in size and light in weight.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the three-dimensional structure of an elbow joint steering exerciser according to the present utility model;

FIG. 2 is a schematic diagram of a three-dimensional exploded structure of the elbow joint steering exerciser according to the present invention.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Referring to Fig. 1-2, an elbow joint steering exerciser comprises: a proximal rod anchoring component 3, the proximal rod anchoring component 3 comprises an annular connector and a transverse connector integrally connected to the annular connector, a central axis is fixedly connected in the middle of the annular connector, the center of the central axis is hollow, a light-transmitting centering window 11 is installed on the end surface of the central axis, and the light-transmitting centering window 11 can provide elbow joint center guidance during installation and treatment, a worm gear 14 is sleeved on the central axis, and a hinge 5 is fixedly connected to the worm gear 14, the The hinged part 5 is adjustably connected to the distal rod anchoring component 6, and the end of the distal rod anchoring component 6 away from the worm gear 14 is locked and fixed with the second connecting rod 10 through the first fixing bolt 9. The second connecting rod 10 is connected to the fixing needle and the ulna through the rod clamp, and the end of the transverse connecting part away from the annular connecting part is fixed to the first connecting rod 1 through the second fixing bolt 2; the elbow joint is fixed by the connection of the proximal rod anchoring component 3, the connecting rod 1, the connecting rod 10 and the rod clamp, which can achieve the effect of fixing and controlling the movement and treatment of the elbow joint.

A worm 12 is inserted into the annular connector, and the worm 12 and the transverse connector are both arranged transversely. A worm limiter 13 is inserted into the surface of the annular connector located at the worm 12, and the worm limiter 13 is used to adjust the position of the worm 12; the rotation of the worm 12 can control the worm wheel 14 to rotate around the central axis. When the worm limiter 13 is removed, the worm 12 can be taken out, and the worm wheel 14 can drive the hinge 5 to rotate freely around the central axis.

Furthermore, the structure of the worm wheel 14 is annular, and a gear is arranged around the outer surface of the worm wheel 14 , and the gear meshes with the gear on the worm 12 .

Furthermore, the distal rod anchoring component 6 includes an adjusting connection section and a fixed connection section integrally connected to the connection section, the adjusting connection section includes two fixed plates arranged in parallel to each other, an extension bolt 8 is threadedly connected to the middle portion of the fixed connection section, and the extension bolt 8 extends to between the two fixed plates arranged in parallel to each other. Sliding grooves are respectively provided on opposite side surfaces of the hinge 5, the sliding grooves match the fixed plates, and an adjusting hole is provided in the middle portion of the hinge 5, an adjusting bolt 4 is provided in the adjusting hole, the adjusting bolt 4 passes through the two fixed plates in sequence, and the extension bolt 8 extends from the fixed connection section to the position of the adjusting bolt 4 to conflict with the adjusting bolt 4. When the adjusting bolt 4 is loosened, the position of the distal rod anchoring component 6 on the sliding groove can be adjusted by rotating the extension bolt 8. The extension bolt 8 can be fixedly connected to the distal rod anchoring component 6 through the pin 7.

Specifically, the proximal rod anchoring component 3 is integrally associated with the proximal bone of the patient's upper limb, and the distal rod anchoring component 6 is integrally associated with the distal bone of the patient's upper limb. The articulator hinges the proximal rod anchoring component 3 and the distal rod anchoring component 6 together, and the articulator includes a central axis and a light-transmitting centering window 11 that passes through the articulation axis. The light-transmitting centering window 11 is used to frame the elbow joint when positioning the external orthopedic fixator. The light-transmitting centering window 11 can have a cylindrical geometry and confine the articulation pin between the proximal connection part and the distal connection part. The presence of the light-transmitting centering window 11 provides significant assistance in the step of centering the joint axis. The light-transmitting centering window 11 can advantageously include a central tube oriented along the central axis to allow the possible insertion of a reference wire of a known type such as, for example, a Kirschner wire.

The proximal rod anchoring component 3 comprises at least one proximal rod connected to the hinge and fixed to the proximal bone by a proximal intrabone needle supported by at least one nail clip. The distal intrabone needle can be supported by at least one distal nail clip associated with the distal rod, which can advantageously allow three degrees of freedom between the rod and the needle, namely, the distal intrabone needle can be directly supported by the distal rod and held in place by means of a locking piece fastened to the distal rod by a fixing member (e.g. a fixing screw), generally due to the ability of the rod to slide axially on its seat, the ability of the needle to slide axially in its seat, and the possibility of angular adjustment between the engaging elements of the locking rod and the needle. The distal rod and the locking piece can have relative hollow parts that work together to define the seat of the distal intrabone needle. It has the obvious advantage of reducing the cost of the structure. The distal endosseous needle is supported by at least one insert which rotatably overlaps with a base integral with the distal rod, and a locking member for holding the distal endosseous needle in an appropriate position is arranged above the insert, and the locking member can be locked on the distal base by a fixing member (especially a fixing screw), and the fixing member can also advantageously allow blocking of relative movement between the base and the insert.

The articulator can advantageously include joint locking components arranged to block relative rotation between the proximal coupling part and the distal coupling part. In particular, these components can take the form of joint locking screws. The articulator can also include joint distraction components arranged to allow the distal anchoring component to translate relative to the proximal anchoring component. The above-mentioned translation occurs along a distraction axis inclined at a distraction angle relative to the longitudinal axis of the distal bone, and the distraction angle is included between 60° and 75", preferably 66". The distal coupling part can include a coupling element hinged to the proximal coupling part and a distal connector integral with the distal anchoring part, which is slidably movable relative to the coupling element. In this case, the joint distraction component can be arranged to cause the distal connector to translate relative to the coupling element. The distal connector can include a sliding arm slidably inserted into a sliding seat of the coupling element, and then has the joint distraction component in the form of a screw for distraction control, including a head rotatably associated with the sliding seat and a handle engaged in the sliding arm.

The number of devices and processing scale described here are used to simplify the description of the utility model. The application, modification and variation of the utility model are obvious to those skilled in the art.

Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims (5)

1. An elbow joint steering exerciser, comprising: A proximal rod anchoring component (3), the proximal rod anchoring component (3) comprising an annular connecting member and a transverse connecting member integrally connected to the annular connecting member, a central axis being fixedly connected in the middle of the annular connecting member, a worm gear (14) being sleeved on the central axis, a hinge (5) being fixedly connected to the worm gear (14), the hinge (5) being adjustably connected to a distal rod anchoring component (6), a second connecting rod (10) being fixedly connected to one end of the distal rod anchoring component (6) away from the worm gear (14), and a first connecting rod (1) being fixedly connected to one end of the transverse connecting member away from the annular connecting member; A worm (12) is inserted into the annular connecting piece, and the worm (12) and the transverse connecting piece are both arranged transversely. 2. An elbow joint steering exerciser as described in claim 1, characterized in that the structure of the worm wheel (14) is annular, and a gear is arranged on the outer surface of the worm wheel (14), and the gear is meshed with the gear on the worm (12). 3. An elbow joint steering exerciser as described in claim 2, characterized in that a worm limiter (13) is inserted into the surface of the annular connecting piece located at the worm (12), and the worm limiter (13) is used to adjust the position of the worm (12). 4. An elbow joint steering exerciser as described in claim 1, characterized in that the distal rod anchoring component (6) includes an adjusting connecting section and a fixed connecting section integrally connected to the connecting section, the adjusting connecting section includes two fixing plates arranged parallel to each other, and an extension bolt (8) is threadedly connected to the middle part of the fixed connecting section, and the extension bolt (8) extends between the two fixing plates arranged parallel to each other. 5. An elbow joint steering exerciser as described in claim 1, characterized in that sliding grooves are respectively provided on opposite sides of the hinge (5), the sliding grooves match the fixing plates, and an adjustment hole is provided in the middle portion of the hinge (5), an adjusting bolt (4) is arranged in the adjustment hole, the adjusting bolt (4) passes through the two fixing plates in sequence, and the extension bolt (8) extends from the fixed connection section to the position of the adjusting bolt (4) to conflict with the adjusting bolt (4).