Medical leg circumference measurer suitable for knees of different sizes

Abstract

The utility model provides a medical leg circumference measuring device which comprises a leaning seat (1), and the upper side and the lower side of the leaning seat (1) are respectively connected with a thigh measuring scale (78) and a shank measuring scale (79) through a first measuring tape (8) and a second measuring tape (9). A connecting groove (13) is formed in the outer wall of the leaning seat (1), and a rotating wheel (2) and a ratchet mechanism are installed in the leaning seat (1). A reverse reset spring (3) is arranged in the rotating wheel (2), a bandage (4) is wound on the outer side of the rotating wheel (2), the inner end of the bandage (4) is fixed to the rotating wheel (2), and the free end (41) of the outer end of the bandage (4) extends out of the leaning seat (1). When the leg girth is measured, the leaning seat (1) is placed at the knee of the human body, the free end (41) of the bandage (4) is pulled to bypass the knee of the human body to move to the connecting groove (13) to be fixed, the limit releasing button (16) is pressed down to enable the ratchet mechanism to release the limitation on the rotating wheel (2), the reverse reset spring (3) drives the rotating wheel (2) to reset so as to tighten the bandage (4), and the leaning seat (1) is tightened at the knee of the human body.

Description

Technical Field

[0001] The utility model relates to a medical measuring instrument, in particular to a medical leg circumference measuring device. Background Art

[0002] After deep vein thrombosis of the lower limbs of the human body, the most common symptom is swelling of one limb, so the leg circumference of the lower limbs can be measured to assess whether the patient has formed deep vein thrombosis of the lower limbs. Specifically, it is necessary to measure the thigh leg circumference 15cm above the patella of both lower limbs, that is, the knee center point and the calf leg circumference 10cm below the patella. Before measuring the leg circumference of these two places, it is necessary to use a straight ruler to get the specific positions of these two places and mark them before measuring, which is cumbersome. Patent document CN217645227 U discloses a medical leg circumference measuring device, which includes a support seat, and the upper and lower surfaces of the support seat are each connected to a measuring ruler for measuring the leg circumference through a connecting plate. Two straps extend from both sides of the support seat, and a button is installed on the first strap, and a plurality of buckle holes are opened on the second strap. The button on one strap is buckled into the buckle hole of the second strap, and the support seat is fixed on the human knee. Although there are multiple buckle holes on the strap, the positions of the buckle holes are fixed. If the knee size happens to be between the two sizes adapted by the two adjacent buckle holes inside and outside, the buckle on the first strap cannot be buckled into the inner buckle hole of the second strap during installation because it is too tight, and the buckle into the outer buckle hole is too loose to firmly install the support seat on the knee. Summary of the invention

[0003] The problem to be solved by the utility model is to provide a medical leg circumference measuring device, the binding belt of which is suitable for knees of different sizes and is neither too loose nor too tight.

[0004] In order to solve the above problems, the utility model provides a medical leg circumference measuring device suitable for knees of different sizes, comprising a rest seat for being placed on the human knee, a thigh measuring ruler for measuring the leg circumference connected to the upper side of the rest seat through a first tape measure of 15 cm in length, and a calf measuring ruler for measuring the leg circumference connected to the lower side through a second tape measure of 10 cm in length, a rotating wheel is installed in the rest seat, a strap is wrapped around the outer side of the rotating wheel, the inner end of the strap is fixed on the rotating wheel and the outer end is a free end extending outwardly to the outside of the rest seat; a connecting groove is opened on the outer surface of the rest seat, when the free end of the strap is pulled out in the forward direction, the fixed end of the strap drives the rotating wheel to rotate in the forward direction, and the free end of the strap moves around the outer circumference of the knee to be fixed in the connecting groove; a reverse reset spring is included for driving the rotating wheel to rotate in the reverse direction and reset; a ratchet mechanism for limiting the rotation direction of the rotating wheel to prevent the rotating wheel from rotating in the reverse direction is arranged in the rest seat, and the ratchet mechanism is provided with an exposed release button, and when the release button is pressed, the ratchet mechanism releases the restriction on the rotating wheel.

[0005] Furthermore, the rest seat, the rotating wheel, the strap, the reverse reset spring and the ratchet mechanism constitute a first legging device, the thigh measuring ruler comprises a second legging device having the same structure as the first legging device, the straps of the second legging device are additionally marked with sizes, and the calf measuring ruler comprises a third legging device having the same structure as the second legging device.

[0006] Furthermore, the ratchet mechanism includes an upper ratchet and a lower ratchet, the ratchet and the rotating wheel are fixedly installed together and the axes of the two coincide, the ratchet blocks the ratchet so that the ratchet cannot rotate in the reverse direction, thereby limiting the rotation direction of the rotating wheel to prevent the rotating wheel from rotating in the reverse direction; the release button is pressed to drive the ratchet away from the ratchet so that the ratchet no longer blocks the ratchet, thereby releasing the restriction on the rotating wheel.

[0007] Furthermore, it includes a release reset spring for driving the release button to reset.

[0008] Furthermore, the reverse return spring is a clockwork spring, which is located inside the rotating wheel, with its inner end fixedly connected to the supporting seat and its outer end fixedly connected to the rotating wheel.

[0009] Furthermore, the fitting surface of the backrest is recessed inwardly to fit the human body, the free end of the strap specifically extends out from the fitting surface of the backrest, and the connecting groove is specifically opened on the fitting surface of the backrest.

[0010] The utility model has the following beneficial effects:

[0011] When it is necessary to measure the leg circumference, just place the support seat at the human knee, pull the free end of the strap forward to move around the outer circumference of the human knee to the connection groove for fixing. During this process, the fixed end of the strap drives the rotating wheel to rotate forward. Since the ratchet mechanism prevents the rotating wheel from rotating in the opposite direction, the reverse reset spring will not drive the rotating wheel to rotate in the opposite direction for reset, that is, the rotating wheel will not accidentally rotate in the opposite direction for reset. Since the length of the strap can be freely adjusted, you can first pull the strap out to a sufficient length to ensure that it is not too tight, and then press the release button to allow the ratchet mechanism to release the restriction on the rotating wheel. Then the reverse reset spring will drive the rotating wheel to rotate in the opposite direction for reset. The rotating wheel rotates in the opposite direction to tighten the strap at the human knee, so that the support seat is tied tightly to the human knee and will not be too loose. After tying the rest seat, press the first tape measure and the second tape measure so that they are both close to the human skin, and then the thigh measuring ruler and the calf measuring ruler can be more accurately positioned 15 cm above the center of the knee and 10 cm below the center of the knee, respectively. In this way, the thigh measuring ruler and the calf measuring ruler can be used to measure the circumference of the thigh and calf. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a medical leg circumference measuring device.

[0013] Figure 2 It is a schematic diagram of the interior of the backrest.

[0014] Figure 3 This is a schematic diagram of the interior of the backrest, with the release button not pressed.

[0015] Figure 4 It is a schematic diagram of the interior of the backrest, with the release button pressed.

[0016] Figure 5 This is a schematic diagram of the back of the support seat, in which the release button, ratchet and release return spring are removed. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with specific implementation methods.

[0018] The most common symptom of deep vein thrombosis in the lower limbs is swelling of one side of the limbs. Therefore, to assess whether a person has deep vein thrombosis in the lower limbs, the leg circumference of the thigh 15cm above the patella (knee center) and the leg circumference 10cm below the patella are generally measured. In order to more conveniently measure the leg circumference of these two points, a medical leg circumference measuring instrument is made as follows Figure 1 As shown, it includes a rest seat 1 for resting on the human knee, a thigh measuring ruler 78 for measuring the leg circumference is connected to the upper side of the rest seat 1 through a first tape measure 8 with a length of 15 cm, and a calf measuring ruler 79 for measuring the leg circumference is connected to the lower side through a second tape measure 9 with a length of 10 cm. When in use, it is only necessary to fix the rest seat 1 to the knee, place the thigh measuring ruler on the thigh, and then press the first tape measure between the rest seat and the thigh measuring ruler to make the first tape measure close to the human skin, so that the thigh measuring ruler can be positioned 15 cm above the center point of the knee, and then the thigh measuring ruler can be used to measure the thigh circumference. Similarly, the calf measuring ruler is positioned 10 cm below the center point of the knee through the second tape measure, and then the calf measuring ruler can be used to measure the calf circumference.

[0019] Seat 1 Figure 2As shown, the side of the outer surface of the support seat 1 that fits the human body is a fitting surface 10, which is concave inward to fit the human body. In order to adapt to different knee sizes, a rotating wheel 2 is installed inside the support seat 1, and a reverse reset spring 3 is installed inside the rotating wheel 2. The reverse reset spring 3 is a spring spring, and its inner end is fixedly connected to the support seat 1 and the outer end is fixedly connected to the rotating wheel 2; a strap 4 is wrapped around the outer side of the rotating wheel 2, and the inner end of the strap 4 is fixed on the rotating wheel 2 and the outer end is a free end 41. The free end 41 of the strap 4 extends outward from the fitting surface 10 of the support seat 1 to the outside of the support seat 1, and a connecting groove 13 is also provided on the fitting surface 10 of the support seat 1. When it is necessary to measure the leg circumference, the support seat 1 is placed at the human knee, and the free end 41 of the strap 4 is pulled out in the forward direction, and the fixed end of the inner end of the strap 4 drives the rotating wheel 2 to rotate in the forward direction. Since the length of the strap 4 can be freely adjusted, the strap can be pulled out to a sufficient length to ensure that it is not too tight. The free end 41 of the strap 4 is pulled to move around the outer periphery of the human knee to the connection groove 13 for fixing. During the whole process, the outer end of the reverse reset spring 3 rotates with the rotating wheel 2, generating bending elastic deformation, so that the rotating wheel 2 has a tendency to reversely rotate and reset. A ratchet mechanism is provided in the support seat 1 to prevent the rotating wheel 2 from accidentally reversing and resetting. The ratchet mechanism includes an upper ratchet 21 and a lower ratchet 6. The ratchet 21 is fixedly installed with the rotating wheel 2 and the axes of the two coincide. The ratchet 6 blocks the ratchet 21 so that the ratchet 21 cannot rotate in the reverse direction, and the rotating wheel 2 cannot rotate in the reverse direction. In this way, the ratchet mechanism limits the rotation direction of the rotating wheel. The ratchet 6 is connected to an exposed release button 61. After the free end 41 of the strap 4 is pulled to the connection groove 13 and fixed, the release button 61 is pressed. The release button 61 moves downward to drive the ratchet 6 downward away from the ratchet 21 so that the ratchet 6 no longer blocks the ratchet 21, and the restriction of the rotating wheel 2 by the ratchet mechanism can be released. The reverse reset spring 3 drives the rotating wheel 2 to rotate in the reverse direction and reset. The rotating wheel 2 rotates in the reverse direction to tighten the strap 4 at the human knee, so that the support seat 1 is tied to the human knee and will not be too loose. A release reset spring 16 is provided below the release button 61 to drive the release button 61 to reset. After the release button 61 is released, the release reset spring 16 rebounds and drives the release button 61 to reset. The ratchet 6 is reset immediately, and the ratchet mechanism again prevents the reverse rotation of the rotating wheel 2.

[0020] The first legging device is composed of a support seat 1, a rotating wheel 2, a strap 4, a reverse reset spring 3 and a ratchet mechanism. The thigh measuring ruler 78 adopts a second legging device with the same structure as the first legging device. The strap 4 of the second legging device is additionally marked with a size. When measuring the thigh circumference, it is only necessary to place the support seat 1 on the thigh, pull the free end 41 of the strap 4 around the outer circumference of the thigh to move to the connecting groove 13 to fix it, press the limit release button 61, release the limit of the ratchet mechanism on the rotating wheel 2, and the reverse reset spring 3 drives the rotating wheel 2 to rotate in the opposite direction to reset and tighten the strap 4 located at the human thigh. Observe the size marked on the strap 4 to obtain the data of the thigh circumference. The calf measuring ruler 79 adopts a third legging device with the same structure as the second legging device, and the calf circumference is measured in the same way.

[0021] The above is only an implementation method of the invention, and does not limit the scope of patent protection. Those skilled in the art can make non-substantial changes or substitutions based on the invention, which still fall within the scope of patent protection.

Claims

1. A medical leg circumference measuring device suitable for different sizes of knees, characterized by: The invention comprises a support seat (1) for being placed on the knee of a human body, wherein the upper side of the support seat (1) is connected to a thigh measuring ruler (78) for measuring the leg circumference via a first tape measure (8) with a length of 15 cm, and the lower side is also connected to a calf measuring ruler (79) for measuring the leg circumference via a second tape measure (9) with a length of 10 cm, a rotating wheel (2) is installed inside the support seat (1), a strap (4) is wound around the outer side of the rotating wheel (2), the inner end of the strap (4) is fixed on the rotating wheel (2) and the outer end is a free end (41) extending outwardly to the outside of the support seat (1); the outer surface of the support seat (1) is provided with a connecting rod (41) and a connecting rod (41) is provided on the outer surface of the support seat (1). The connecting groove (13) is provided with a ratchet mechanism for limiting the rotation direction of the rotating wheel (2) to prevent the rotating wheel (2) from rotating in the reverse direction. The ratchet mechanism is provided with an exposed release button (61). When the release button (61) is pressed, the ratchet mechanism releases the restriction on the rotating wheel (2).

2. The medical leg circumference measuring device according to claim 1, characterized in that: The support seat (1), the rotating wheel (2), the strap (4), the reverse reset spring (3) and the ratchet mechanism constitute a first legging device, the thigh measuring ruler (78) comprises a second legging device with the same structure as the first legging device, the strap (4) of the second legging device is additionally marked with a size, and the calf measuring ruler (79) comprises a third legging device with the same structure as the second legging device.

3. The medical leg circumference measuring device according to claim 1 or 2, characterized in that: The ratchet mechanism comprises an upper ratchet (21) and a lower ratchet (6); the ratchet (21) and the rotating wheel (2) are fixedly mounted together and their axes coincide with each other; the ratchet (6) blocks the ratchet (21) so that the ratchet (21) cannot rotate in the reverse direction, thereby limiting the rotation direction of the rotating wheel (2) to prevent the rotating wheel (2) from rotating in the reverse direction; when the release button (61) is pressed, the ratchet (6) is driven away from the ratchet (21) so that the ratchet (6) no longer blocks the ratchet (21), thereby releasing the restriction on the rotating wheel (2).

4. The medical leg circumference measuring device according to claim 3, characterized in that: The utility model comprises a limit release reset spring (16) for driving the limit release button to reset.

5. The medical leg circumference measuring device according to claim 1, characterized in that: The reverse reset spring (3) is a spring-loaded spring located inside the rotating wheel (2), with its inner end fixedly connected to the support seat (1) and its outer end fixedly connected to the rotating wheel (2).

6. The medical leg circumference measuring device according to claim 1 or 2, characterized in that: The fitting surface (10) of the support seat (1) is recessed inwards to fit the human body, the free end (41) of the strap (4) specifically extends from the fitting surface (10) of the support seat (1), and the connecting groove (13) specifically is opened on the fitting surface (10) of the support seat (1).

Images