A leg circumference measuring device
By designing a leg circumference measuring device with a combination structure of a positioning collar, rotating plate, and lifting rod featuring silicone pads and Velcro, the problems of inaccurate measurement and insufficient comfort in existing technologies have been solved. This enables accurate leg circumference measurement for patients of different body types and curvatures, improving the stability and repeatability of the measurement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHUJIANG HOSPITAL OF SOUTHERN MEDICAL UNIVERSITY
- Filing Date
- 2025-03-07
- Publication Date
- 2026-06-16
AI Technical Summary
Existing leg circumference measurement devices cannot adapt to the leg length and curvature of patients of different body sizes, resulting in inaccurate measurements, inconvenience in recording multiple measurements at the same location, and insufficient patient comfort.
A leg circumference measuring device was designed, comprising a positioning collar, an adjustment component, and a side circumference component. The positioning collar is made to fit tightly to the patient's knee using silicone pads and Velcro. The combination structure of the rotating plate and the lifting rod adapts to different curvatures. The adjustment of the limiting post and the positioning bolt enables precise length measurement. The stability and accuracy of the measurement are ensured by the cooperation of the clamping plate and the measuring tape.
It achieves stability and accuracy in measuring leg circumference for patients with different body shapes and curvatures, improves measurement comfort and the convenience of repeated measurements, and ensures the accuracy of measurement data and the reliability of recording.
Smart Images

Figure CN224357599U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of leg circumference measurement technology, specifically a leg circumference measuring device. Background Technology
[0002] For patients with deep vein thrombosis in the lower extremities, measuring leg circumference is a common clinical method to observe the degree of swelling in the affected limb.
[0003] The utility model with announcement number CN219331651U discloses a leg circumference measuring device, including a positioning plate and a measuring tape box. Two measuring tape boxes are provided. Adjusting plates are slidably connected to both ends of the positioning plate. The end of each adjusting plate away from the positioning plate is fixedly connected to the corresponding measuring tape box.
[0004] The above technical solution uses the retraction of a spring to allow the measuring tape to automatically conform to the patient's leg, effectively avoiding the problem of inconsistent tension that can affect measurement data when the operator tightens the tape, thus ensuring the accuracy of the equipment. The positioning pointer and observation port allow for timely and accurate determination of the scale on the measuring tape, facilitating data observation and recording. Simultaneous measurement of the thigh and calf circumference is possible, significantly improving the equipment's measurement efficiency and usability. However, when measuring leg circumference, it is not convenient to maintain the same position for accurate measurements on the same patient multiple times. Patients of different body types have different leg lengths, making it impossible to adjust the tape length accordingly. Furthermore, the different curvatures of the thigh and calf make stable contact during measurement difficult. Additionally, the measuring tape cannot be quickly installed and the measurement values cannot be accurately determined during leg circumference measurement. Utility Model Content
[0005] The purpose of this invention is to provide a leg circumference measuring device to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A leg circumference measuring device includes a positioning collar and an adjusting assembly symmetrically mounted and rotatably connected to the sides of the positioning collar. Each adjusting assembly is provided with a circumference component. The outer wall of the positioning collar is provided with a hook-and-loop fastener near the edge, and the outer wall of the positioning collar is also provided with a rough-surface hook-and-loop fastener corresponding to the hook-and-loop fastener. The outer wall of the positioning collar is provided with a pivot seat near the upper and lower edges. The adjusting assembly includes a rotating plate and a lifting rod that is inserted into the rotating plate. The bottom of the rotating plate is provided with a connecting shaft corresponding to the pivot seat. A first scale line is opened in the middle of the outer wall of the lifting rod, and a slot is opened in the top of the rotating plate.
[0008] The side panel assembly includes a measuring tape connected to a plate and the side wall of the plate. The bottom of the plate is connected to the top of the lifting rod. An adhesive block is provided at the end of the plate away from the measuring tape. A U-shaped bracket is provided at the end of the adhesive block. A second scale line is provided on the outer wall of the measuring tape, and a positioning buckle is provided at the end of the measuring tape.
[0009] Furthermore, a groove is provided on the inner side of the positioning collar, and a silicone pad is provided in the groove. The silicone pad is circular and is bonded and fixed to the positioning collar.
[0010] In this invention, the silicone pad and the positioning collar work together to ensure that the positioning collar fits tightly against the patient's knee, while the silicone pad increases the comfort of contact with the patient's knee and reduces friction to prevent discomfort.
[0011] Specifically, one end of the hook and loop fastener is bonded and fixed to the positioning collar, one end of the rough hook and loop fastener is bonded and fixed to the positioning collar, and the rough hook and loop fastener and the hook and loop fastener are bonded and fixed to each other.
[0012] In this invention, the combination of textured and barbed Velcro allows for the positioning loop to be fixed on the knees of patients of different body types, increasing the stability of the binding and thus ensuring stable measurement of the calf or thigh circumference.
[0013] It should be noted that the connecting shaft and the rotating plate are integrally formed, the connecting shaft is rotatably connected to the corresponding rotating shaft seat, and the width of the inner wall of the slot is adapted to the width of the outer wall of the lifting rod.
[0014] In this invention, with the cooperation of the connecting shaft, the rotating plate can rotate and cooperate on the upper and lower parts of the positioning collar, so that it can stably fit and measure the leg circumference of different patients with different calf and thigh curvatures. The lifting rod and the slot are tightly connected and cooperated, and the extension and retraction adjustment of the lifting rod can be used to measure thighs and calves of different lengths.
[0015] Furthermore, a screw hole communicating with the slot is provided on the side wall of the rotating plate, and a positioning bolt is provided in the screw hole.
[0016] In this invention, the positioning bolt is threadedly connected to the screw hole, and the end of the positioning bolt is tightly fitted to the side wall of the lifting rod. Under the action of friction, the position of the lifting rod on the rotating plate is fixed, thereby achieving overall length adjustment and matching.
[0017] Specifically, a limiting post is provided on the outer wall of the lifting rod near the bottom, and a limiting groove communicating with the slot is provided on the outer wall of the rotating plate. The limiting post and the limiting groove are inserted and matched, and the scale values on the first scale line are distributed at equal intervals.
[0018] In this invention, the limiting post and the lifting rod are integrally formed, and the limiting post and the limiting groove slide together to prevent the lifting rod from detaching from the rotating plate and affecting the combined installation and use. The scale value of the first scale line has an accuracy of 1mm, which helps to adjust the fixed length and measure the leg circumference at the same position of the thigh or calf, making it convenient to record and observe the changes in the leg circumference of the same patient at the same location.
[0019] It is worth noting that the bottom of the card plate is welded and fixed to the top of the lifting rod, and a rubber pad is provided on the inner side of the card plate. The rubber pad is arc-shaped and is bonded and fixed to the card plate.
[0020] In this invention, the rubber pad increases the comfort of the plate fitting against the patient's thigh and calf, while also increasing the friction of the contact, thereby achieving stability in measuring leg circumference.
[0021] Furthermore, the measuring tape is bonded and fixed to the card plate, the adhesive block is bonded and fixed to the card plate, the U-shaped card seat and the adhesive block are integrally formed, the positioning buckle is bonded and fixed to the measuring tape, the positioning buckle is engaged with the U-shaped card seat, the inner wall of the U-shaped card seat is provided with hook and loop fasteners, and the outer wall of the adhesive block is provided with hook and loop fasteners.
[0022] In this invention, the measuring tape is conveniently held and moved by hand through a positioning buckle. The measuring tape passes through a U-shaped holder and slides within the U-shaped holder according to different leg circumference sizes. After measurement, the hook and loop fasteners on the U-shaped holder and the hook and loop fasteners on the adhesive block are bonded together to fix the position of the measuring tape on the U-shaped holder. The accuracy of the scale value on the second scale line is 1mm, and the scale value at the point where the second scale line corresponds to the outer end of the U-shaped holder is the measured leg circumference value.
[0023] Compared with the prior art, the beneficial effects of this utility model are:
[0024] 1. This utility model uses a positioning collar with a silicone pad. With the cooperation of hook and loop fasteners, the positioning collar fits the front surface of the patient's knee. Both rotating plates are connected by the positioning collar via a connecting shaft, ensuring a tight fit even when the thigh and calf have different degrees of curvature. The clamping plate, with the cooperation of the measuring tape and adhesive block, enables leg circumference measurement. The positioning buckle provides a point of force, and the measuring tape slides with the U-shaped clamping seat, facilitating movement and adaptability to measuring different leg circumferences.
[0025] 2. This utility model achieves overall length adjustment between the lifting rod and the rotating plate by setting a positioning bolt and a screw hole threaded connection, which can be used to measure the leg circumference of patients of different sizes. The lifting rod is limited in its range of motion with the limiting post and the limiting groove. With the cooperation of the first scale line, the length of the lifting rod can be precisely adjusted to shrink or extend. The rubber pad increases the comfort of the contact between the plate and the leg and increases the friction. The inner wall of the positioning buckle and the outer wall of the adhesive block are fixed by hook and loop fasteners. The measuring tape can be easily removed from the U-shaped card seat. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0027] Figure 2 This is a schematic diagram of the measurement and adjustment state of this utility model;
[0028] Figure 3 This is a schematic diagram of the positioning collar structure of this utility model;
[0029] Figure 4 This is a schematic diagram of the adjustment component structure of this utility model;
[0030] Figure 5 This is a schematic diagram of the structure of the side panel component of this utility model.
[0031] The meanings of the labels in the diagram are as follows:
[0032] 1. Positioning collar; 10. Groove; 100. Silicone pad; 11. Rotary shaft seat; 12. Spiked hook and loop fastener; 13. Loose hook and loop fastener;
[0033] 2. Adjustment assembly; 20. Rotating plate; 200. Connecting shaft; 201. Slot; 202. Limiting slot; 203. Screw hole; 204. Positioning bolt; 21. Lifting rod; 210. Limiting post; 211. First scale line;
[0034] 3. Side panel assembly; 30. Clamping plate; 300. Rubber pad; 31. Measuring tape; 310. Positioning buckle; 311. Second scale line; 32. Adhesive block; 320. U-shaped bracket. Detailed Implementation
[0035] 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.
[0036] Please see Figures 1-5 This embodiment provides a technical solution:
[0037] A leg circumference measuring device includes a positioning collar 1 and an adjusting component 2 symmetrically installed and rotatably connected to the side of the positioning collar 1. A groove 10 is provided on the inner side of the positioning collar 1, and a silicone pad 100 is provided in the groove 10. The silicone pad 100 is circular and is bonded and fixed to the positioning collar 1.
[0038] In this invention, with the cooperation of the silicone pad 100 and the positioning collar 1, the positioning collar 1 fits tightly against the patient's knee, and the silicone pad 100 increases the comfort of contact with the patient's knee and reduces friction to reduce discomfort.
[0039] Furthermore, each of the adjustment components 2 is provided with a surrounding component 3, and a barbed hook and loop fastener 12 is provided on the outer wall of the positioning collar 1 near the edge. A rough hook and loop fastener 13 is also provided on the outer wall of the positioning collar 1 at the position corresponding to the barbed hook and loop fastener 12. One end of the barbed hook and loop fastener 12 is bonded and fixed to the positioning collar 1, and one end of the rough hook and loop fastener 13 is bonded and fixed to the positioning collar 1. The rough hook and loop fastener 13 and the barbed hook and loop fastener 12 are bonded and fixed to each other.
[0040] In this invention, the combination of the rough-surface hook and loop fastener 13 and the barbed-surface hook and loop fastener 12 enables the positioning loop 1 to be fixed on the knees of patients of different body sizes, increasing the stability of the binding and thus stabilizing the leg circumference measurement of the calf or thigh.
[0041] Specifically, the positioning collar 1 has a rotating shaft seat 11 near the upper and lower edges on its outer wall. The adjustment assembly 2 includes a rotating plate 20 and a lifting rod 21 that is inserted into the rotating plate 20. The bottom of the rotating plate 20 is provided with a connecting shaft 200 corresponding to the rotating shaft seat 11. The connecting shaft 200 and the rotating plate 20 are integrally formed. The connecting shaft 200 is rotatably connected to the corresponding rotating shaft seat 11. The width of the inner wall of the slot 201 is adapted to the width of the outer wall of the lifting rod 21.
[0042] In this invention, with the cooperation of the connecting shaft 200, the rotating plate 20 can rotate and cooperate on the upper and lower surfaces of the positioning collar 1, so that when different patients have different degrees of curvature of their calves and thighs, they can stably fit and measure the corresponding leg circumference. The lifting rod 21 is tightly inserted into the slot 201, and the extension and retraction adjustment of the lifting rod 21 can be used to measure thighs and calves of different lengths.
[0043] It should be noted that a first scale line 211 is provided in the middle of the outer wall of the lifting rod 21, and a slot 201 is provided on the top of the rotating plate 20; a screw hole 203 communicating with the slot 201 is provided on the side wall of the rotating plate 20, and a positioning bolt 204 is provided in the screw hole 203.
[0044] In this utility model, the positioning bolt 204 is threadedly connected to the screw hole 203, and the end of the positioning bolt 204 is tightly fitted to the side wall of the lifting rod 21. Under the action of friction, the position of the lifting rod 21 on the rotating plate 20 is fixed, so as to realize the overall length adjustment and matching.
[0045] Furthermore, a limiting post 210 is provided on the outer wall of the lifting rod 21 near the bottom, and a limiting groove 202 communicating with the slot 201 is provided on the outer wall of the rotating plate 20. The limiting post 210 and the limiting groove 202 are inserted and engaged, and the scale values on the first scale line 211 are distributed at equal intervals.
[0046] In this utility model, the limiting post 210 and the lifting rod 21 are integrally formed, and the limiting post 210 and the limiting groove 202 slide together to prevent the lifting rod 21 from disengaging from the rotating plate 20 and affecting the combined installation and use. The scale value of the first scale line 211 has an accuracy of 1mm, which helps to adjust the fixed length and measure the leg circumference at the same position of the thigh or calf, making it convenient to record and observe the changes in the leg circumference of the same patient at the same location.
[0047] Specifically, the side assembly 3 includes a card plate 30 and a measuring tape 31 connected to the side wall of the card plate 30. The bottom of the card plate 30 is welded and fixed to the top of the lifting rod 21. A rubber pad 300 is provided on the inner side of the card plate 30. The rubber pad 300 is arc-shaped and is bonded and fixed to the card plate 30.
[0048] In this invention, the rubber pad 300 increases the comfort of the card plate 30 in contact with the patient's thigh and calf, and at the same time increases the friction of the contact, thereby achieving the stability of the leg circumference measurement.
[0049] It is worth adding that the bottom of the card plate 30 is connected to the top of the lifting rod 21. An adhesive block 32 is provided on the end of the card plate 30 away from the tape measure 31. A U-shaped card seat 320 is provided at the end of the adhesive block 32. A second scale line 311 is provided on the outer wall of the tape measure 31, and a positioning buckle 310 is provided at the end of the tape measure 31.
[0050] Furthermore, the measuring tape 31 is bonded and fixed to the card plate 30, the adhesive block 32 is bonded and fixed to the card plate 30, the U-shaped card seat 320 and the adhesive block 32 are integrally formed, the positioning buckle 310 is bonded and fixed to the measuring tape 31, the positioning buckle 310 and the U-shaped card seat 320 are engaged and cooperated, the inner wall surface of the U-shaped card seat 320 is provided with hook and loop fasteners, and the outer wall of the adhesive block 32 is provided with hook and loop fasteners.
[0051] In this utility model, the measuring tape 31 is conveniently moved by hand via the positioning buckle 310, and the measuring tape 31 passes through the U-shaped bracket 320. Depending on the size of different leg circumferences, the measuring tape 31 slides in the U-shaped bracket 320. After the measurement is completed, the hook and loop fastener on the U-shaped bracket 320 and the hook and loop fastener on the adhesive block 32 are bonded together to fix the position of the measuring tape 31 on the U-shaped bracket 320. The accuracy of the scale value on the second scale line 311 is 1mm, and the scale value at the corresponding point of the second scale line 311 and the outer end of the U-shaped bracket 320 is the measured leg circumference value.
[0052] When using the leg circumference measuring device of this embodiment, firstly, the silicone pad 100 is glued and fixed to the hook and loop fastener 13 with rough surface and hook and loop fastener 12. Then, the lifting rod 21 with the first scale line 211 is inserted and engaged with the rotating plate 20 with the limit groove 202 through the limiting post 210. The clamping plate 30 with the rubber pad 300 is combined and connected to the top of the lifting rod 21. Then, the tape measure 31 with the positioning buckle 310 and the second scale line 311 is combined and fixed to the clamping plate 30. Then, the adhesive block 32 with the U-shaped clamping seat 320 is glued and fixed to the clamping plate 30.
[0053] When patients of different body sizes need to have their leg circumference measured, medical staff will place the positioning collar 1 against the knee and wrap the hook and loop fasteners 13 and serrated hook and loop fasteners 12 around the leg and fix them together. According to the curvature between the calf and thigh, the position of the rotating plate 20 on the positioning collar 1 will be adjusted. As needed, the position of the lifting rod 21 on the leg will be adjusted and fixed by the positioning bolt 204 and the screw hole 203. Then, the clamping plate 30 will be placed against the patient's leg and the positioning buckle 310 will be pulled. The measuring tape 31 will pass through the U-shaped clamping seat 320. When the measuring tape 31 is tightly attached to the leg, the hook and loop fasteners will be attached to the outer wall of the adhesive block 32 by hook and loop fasteners. The second scale line 311 and the scale corresponding to the outer end of the U-shaped clamping seat 320 will be the leg circumference value.
[0054] For the same patient, the value of the first scale line 211 is recorded, enabling multiple leg circumference measurements to be taken at the same location for the same patient. This facilitates recording the degree of leg swelling. The overall setup is convenient and allows medical staff to quickly perform leg circumference measurements.
Claims
1. A leg circumference measuring device, comprising a positioning collar (1) and an adjusting assembly (2) symmetrically mounted and rotatably connected to the side of the positioning collar (1), wherein each adjusting assembly (2) is provided with a leg circumference assembly (3), characterized in that: The positioning collar (1) has a barbed hook and loop fastener (12) near the edge on its outer wall. The positioning collar (1) also has a rough hook and loop fastener (13) corresponding to the barbed hook and loop fastener (12) on its outer wall. The positioning collar (1) has a rotating shaft seat (11) near the upper and lower edges on its outer wall. The adjustment assembly (2) includes a rotating plate (20) and a lifting rod (21) that is inserted into the rotating plate (20). The bottom of the rotating plate (20) is provided with a connecting shaft (200) corresponding to the rotating shaft seat (11). The lifting rod (211) has a first scale line (211) in the middle of its outer wall. The rotating plate (20) has a slot (201) in the top. The side assembly (3) includes a card plate (30) and a measuring tape (31) connected to the side wall of the card plate (30). The bottom of the card plate (30) is connected to the top of the lifting rod (21). An adhesive block (32) is provided on the card plate (30) at one end away from the measuring tape (31). A U-shaped card seat (320) is provided at the end of the adhesive block (32). A second scale line (311) is provided on the outer wall of the measuring tape (31), and a positioning buckle (310) is provided at the end of the measuring tape (31).
2. The leg circumference measuring device according to claim 1, characterized in that: The positioning collar (1) has a groove (10) on its inner side, and a silicone pad (100) is provided in the groove (10). The silicone pad (100) is circular and is bonded and fixed to the positioning collar (1).
3. The leg circumference measuring device according to claim 1, characterized in that: One end of the hook and loop fastener (12) is bonded and fixed to the positioning collar (1), and one end of the hook and loop fastener (13) is bonded and fixed to the positioning collar (1). The hook and loop fastener (13) and the hook and loop fastener (12) are bonded and fixed to each other.
4. The leg circumference measuring device according to claim 1, characterized in that: The connecting shaft (200) and the rotating plate (20) are integrally formed. The connecting shaft (200) is rotatably connected to the corresponding rotating shaft seat (11). The width of the inner wall of the slot (201) is adapted to the width of the outer wall of the lifting rod (21).
5. The leg circumference measuring device according to claim 4, characterized in that: The rotating plate (20) has a screw hole (203) on its side wall that communicates with the slot (201), and a positioning bolt (204) is provided in the screw hole (203).
6. The leg circumference measuring device according to claim 1, characterized in that: The lifting rod (21) has a limiting post (210) near the bottom on its outer wall, and the rotating plate (20) has a limiting groove (202) that communicates with the slot (201) on its outer wall. The limiting post (210) and the limiting groove (202) are inserted into each other, and the scale values on the first scale line (211) are distributed at equal intervals.
7. The leg circumference measuring device according to claim 1, characterized in that: The bottom of the card plate (30) is welded and fixed to the top of the lifting rod (21). A rubber pad (300) is provided on the inner side of the card plate (30). The rubber pad (300) is arc-shaped and is bonded and fixed to the card plate (30).
8. The leg circumference measuring device according to claim 1, characterized in that: The measuring tape (31) is bonded and fixed to the card plate (30), the adhesive block (32) is bonded and fixed to the card plate (30), the U-shaped card seat (320) and the adhesive block (32) are integrally formed, the positioning buckle (310) is bonded and fixed to the measuring tape (31), the positioning buckle (310) and the U-shaped card seat (320) are engaged, the inner wall of the U-shaped card seat (320) is provided with hook and loop fasteners, and the outer wall of the adhesive block (32) is provided with hook and loop fasteners.