Lower limb brace

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a lower limb brace. Comprising a bottom plate and two supporting arms arranged on the bottom plate, a bearing seat is arranged on the bottom plate and hinged to the tail end of a first supporting arm, a self-locking joint is arranged at the other end of the first supporting arm and hinged to a second supporting arm, a ratchet wheel with inward ratchets is arranged on the inner wall of the self-locking joint, and a one-way rotating shaft at the tail end of the second supporting arm is sleeved with the ratchet wheel. The one-way rotating shaft is provided with a protruding pawl matched with the ratchet wheel, and the pawl presses the inner teeth of the ratchet wheel under the action of the spring to lock the one-way rotating shaft of the second supporting arm in the self-locking joint. The height and the angle can be adjusted and locked, and the folding chair has the advantages of being light in weight, good in stability and foldable.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and particularly relates to a lower limb brace. Background Art

[0002] A lower limb lifting pad is a nursing pad used to place the legs before and after lower limb surgery. The nursing pad has a certain degree of elasticity, which can fix the lower limbs and promote blood return to the extremities. For example, the authorization announcement number CN 212756257 U discloses a leg lifting pad that is easy to adjust in height. It discloses that through the setting of the first electric push rod, the second electric push rod, the slide groove and the slider, the length and height of the equipment can be freely adjusted to achieve the ideal use state. Although the device can adjust the height, according to the instructions and the drawings, it adjusts the height of one side of the lifting pad and cannot adjust the height of the lifting pad as a whole. If only the side where the foot is placed is adjusted, the foot may slide down during use, which makes it inconvenient to use. Another type of supporting lower limb lifting pad, such as the one with the authorization announcement number CN 215535945 U, can only be placed horizontally for the calf. Utility Model Content

[0003] In view of the above problems, the utility model provides a new lower limb brace.

[0004] The specific technical solution of the utility model is as follows: it includes a base plate and two support arms arranged on the base plate, the base plate is provided with a bearing seat, the bearing seat is hinged to one end of the first support arm, the other end of the first support arm is provided with a self-locking joint and is hinged to the second support arm, the inner wall of the self-locking joint has a ratchet with inward ratchet teeth, the ratchet is sleeved on the one-way rotating shaft at the end of the second support arm, the one-way rotating shaft has a protruding pawl adapted to the ratchet, and the pawl is pressed against the inner teeth of the ratchet under the action of a spring to lock the one-way rotating shaft of the second support arm in the self-locking joint.

[0005] As an improvement, a gas spring is provided between the base plate and the first support arm, the first end of the gas spring is hinged to the base plate near the bearing seat, and the second end of the gas spring is hinged to one end of the first support arm near the self-locking joint, and the base plate, the first support arm and the gas spring form a triangle.

[0006] As a further improvement, the bearing seat is provided with a shaft disk, and a plurality of limiting holes or limiting grooves are opened on the outer periphery of the shaft disk. The rotating shaft at the end of the first support arm is fixedly connected to a tongue-shaped positioning plate, and the positioning plate has a protrusion adapted to the limiting hole or limiting groove.

[0007] As a further improvement, the supporting surface of the second supporting arm is a concave surface.

[0008] As a further improvement, the gas spring is fixedly connected using a ball head mounting member.

[0009] The utility model provides a lower limb brace with a simple mechanical structure, which can be adjusted in height and angle and can be locked, and has the advantages of light weight, good stability, and foldability. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic structural diagram of some lower limb braces in the present utility model;

[0011] Figure 2 Schematic diagram of the partial structure of some lower limb braces in the present utility model;

[0012] Figure 3 Schematic diagram of the partial structure of some lower limb braces in the present utility model;

[0013] Figure 4 It is a cross-sectional view of the second support arm in the present invention. DETAILED DESCRIPTION

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to explain the utility model content of the present invention and are not used to limit the scope of protection of the present invention. In the description of the present invention, the terms "front end", "bottom", "one end", "outer", "horizontal", "inner", "upper", "upper part", "rear end", "two ends", "horizontal", "below", "inner", "lower end", "below", "lower part", "upper", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0015] Some embodiments of the present invention, such as Figure 1 As shown, it includes a base plate 1 and two support arms arranged on the base plate 1, a bearing seat 10 is provided on the base plate 1, the bearing seat 10 is hinged to one end of the first support arm 2, and the other end of the first support arm 2 is provided with a self-locking joint 20 and is hinged to the second support arm 3.

[0016] Figure 1 In an embodiment, a gas spring 4 is provided between the base plate 1 and the first support arm 2, the first end of the gas spring 4 is hinged to the base plate 1 near the bearing seat 10, and the second end of the gas spring 4 is hinged to the end of the first support arm 2 near the self-locking joint 20, and the base plate 1, the first support arm 2 and the gas spring 4 form a triangle. Figure 2 In the figure, the direction indicated by the arrow is the direction in which the support arm bears pressure.

[0017] Figure 1-2 The illustrated embodiment may specifically utilize an arbitrary stop gas spring, also known as a balanced gas spring or a friction gas spring, which can stop at any position when loaded without the need for an external control mechanism.

[0018] Gas spring 4, with its pressure cylinder and piston rod at its ends, is fixedly connected to first support arm 2. Based on the aforementioned common knowledge of gas spring structures, the relative linear displacement between the pressure cylinder and piston rod can change the overall longitudinal length of the gas spring. Therefore, as the locked length c of gas spring 4 changes, the length of one side c of the triangle formed by "gas spring 4 - base plate 1 - first support arm 2" also changes.

[0019] In some embodiments based on the above, the cross-section of the internal structure of the self-locking joint is as follows: Figure 2 Its annular inner wall has a ratchet 21 with ratchet teeth facing inward. The ratchet 21 is sleeved on the one-way rotating shaft 30 at the end of the second support arm 3. The one-way rotating shaft 30 has a protruding pawl 31 that is adapted to the ratchet 21. Under the action of the spring 32, the pawl 31 is pressed against the inner teeth of the ratchet 21 to lock the one-way rotating shaft 30 of the second support arm 3 in the self-locking joint.

[0020] When a patient uses the lower limb brace, the bottom plate is first placed flat on the bed, the height and angle of the first and second support arms are adjusted appropriately, the patient's upper body lies flat on the bottom plate, and the lower limbs are raised and placed on the support arms.

[0021] Some embodiments based on the above embodiments, such as Figure 3 The bearing seat 10 shown is equipped with a shaft disc 11, which has a plurality of limiting holes or slots defined on its periphery. The rotating shaft at the end of the first support arm 2 is fixedly connected to a tongue-shaped retaining plate 12, which has protrusions that adapt to the limiting holes or slots. The retaining plate has a certain degree of elasticity, which allows the plate to drive the protrusions into or out of the limiting holes. Together, the shaft disc and retaining plate constitute the rotating shaft retaining mechanism at the end of the first support arm.

[0022] Some embodiments based on the above embodiments, such as Figure 4 , the supporting surface of the second supporting arm is a concave surface.

[0023] When using the lower limb brace, place the patient's lower leg on the support surface of the second support arm.

[0024] In an embodiment based on the above embodiment (not shown in the figure), the gas spring can be a damping gas spring including an intermediate gas stop spring. Preferably, a ball head mounting member is used to fix the gas spring.

[0025] A mid-stop gas spring is a dynamically damped gas spring with additional support in the extension direction. It features two or more grooves of varying depths and lengths, allowing the door / cover to be positioned at various angles or positions. In the first groove section, the gas spring extends freely and then gently stops at the desired position. In the second groove section, the gas spring provides a detent function, allowing it to stop at any position and securely support the load. Applying a specific force pushes or pulls the gas spring to a new position and locks it in place.

[0026] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A lower limb brace, characterized in that: The invention comprises a base plate (1) and two support arms arranged on the base plate (1), wherein a bearing seat (10) is provided on the base plate (1), the bearing seat (10) is hinged to one end of the first support arm (2), the other end of the first support arm (2) is provided with a self-locking joint (20) and is hinged to the second support arm (3), the inner wall of the self-locking joint (20) is provided with a ratchet (21) with ratchet teeth facing inward, the ratchet (21) is sleeved on a one-way rotating shaft (30) at the end of the second support arm (3), the one-way rotating shaft (30) has a protruding pawl (31) adapted to the ratchet (21), and the pawl (31) is pressed against the inner teeth of the ratchet (21) under the action of a spring (32) to lock the one-way rotating shaft (30) of the second support arm (3) in the self-locking joint (20).

2. The lower limb brace according to claim 1, wherein: A gas spring (4) is provided between the base plate (1) and the first support arm (2); a first end of the gas spring (4) is hinged to the base plate (1) near the bearing seat (10); a second end of the gas spring (4) is hinged to an end of the first support arm (2) near the self-locking joint (20); the base plate (1), the first support arm (2) and the gas spring (4) form a triangle.

3. The lower limb brace according to claim 2, wherein: The bearing seat (10) is provided with a shaft disc (11), the outer periphery of which is provided with a plurality of limiting holes or limiting grooves. The rotating shaft at the end of the first support arm (2) is fixedly connected to a tongue-shaped positioning plate (12), and the positioning plate (12) has a protrusion adapted to the limiting holes or limiting grooves.

4. The lower limb brace according to claim 2, wherein: The supporting surface of the second supporting arm (3) is a concave surface.

5. The lower limb brace according to claim 2, wherein: The gas spring (4) is fixedly connected using a ball head mounting member.

Images