Leg circumference measuring device

Abstract

The invention provides a leg circumference measuring device which comprises a measuring frame, a bandage is arranged at the end of the measuring frame, a plurality of sets of mounting shells are arranged on the measuring frame in a sliding mode, a winding shaft is rotatably arranged in the mounting shells along the axis of the winding shaft, a measuring belt is wound on the winding shaft, and the end of the measuring belt extends out of the mounting shells. The display wheel is rotatably arranged in the installation shell along the axis of the display wheel and exposed outside, scale marks are arranged on the circumferential side face of the display wheel, indication lines are arranged on the installation shell, a linkage mechanism connected with the display wheel is arranged on the winding shaft, and rotation of the winding shaft in the single direction is converted into driving of the display wheel to rotate through the linkage mechanism. A locking mechanism is arranged in the mounting shell, and the position of the rotated display wheel can be selectively locked and reset through the locking mechanism. According to the leg circumference measuring device, two adjacent measurement data can be well compared without recording data, and the treatment mode and strength can be conveniently and timely adjusted.

Description

Technical Field

[0001] The invention particularly relates to a leg circumference measuring device. Background Art

[0002] Deep vein thrombosis (DVT) is a common blood circulation disease that causes blood clots to form in the veins of the lower extremities, causing pain, edema, and even life-threatening conditions. When monitoring and treating patients, leg circumference measurement is an important technique that can help medical staff observe the degree of edema. By measuring the patient's leg circumference, we can understand the size changes of the diseased limbs and further determine the treatment effect and the degree of disease progression. Leg circumference measurement can also help doctors diagnose DVT and differentiate it from other diseases, providing more accurate treatment for patients.

[0003] For example, the Chinese invention patent with application number 201911420720.2 provides a tool for measuring leg circumference. When in use, the device can automatically wrap an arc ruler around the outside of the leg. The central processor displays the measured distance of the arc ruler through a display screen, which is convenient for observing the leg circumference. The leg circumference can also be displayed directly on the display screen, which is convenient for medical staff to observe.

[0004] However, although the existing leg circumference measuring device can quickly measure the leg circumference, it cannot retain the measured data, so it is not convenient to compare two adjacent measurement data, and it is not possible to intuitively know the changes in the patient's leg circumference, which makes it inconvenient to adjust the treatment method and intensity. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention proposes a leg circumference measuring device to solve the technical problem raised in the above background technology that the existing leg circumference measuring device cannot retain the measured data, making it inconvenient to compare two adjacent measurement data and unable to intuitively know the changes in the patient's leg circumference.

[0006] To achieve the above object, the present invention provides the following technical solution, a leg circumference measuring device, comprising:

[0007] A measuring frame, wherein a binding strap is provided at the end of the measuring frame;

[0008] A plurality of mounting shells are provided and all are slidably arranged on the measuring frame;

[0009] A winding shaft is rotatably arranged in the mounting shell along its axis, a measuring tape is wound on the winding shaft, and an end of the measuring tape extends out of the mounting shell;

[0010] A display wheel is rotatably arranged in the mounting shell along its axis and exposed to the outside, the peripheral side of the display wheel is provided with scale lines, and the mounting shell is provided with an indication line;

[0011] a linkage mechanism, disposed on the winding shaft and connected to the display wheel, wherein the rotation of the winding shaft in a single direction is converted into driving the display wheel to rotate through the linkage mechanism; and

[0012] The locking mechanism is arranged in the mounting shell to selectively lock and reset the position of the display wheel after rotation.

[0013] In a preferred embodiment, a first constant force spring is provided on the winding shaft, and two ends of the first constant force spring are fixedly connected to the winding shaft and the mounting shell respectively.

[0014] In a preferred embodiment, a connecting frame is provided on the mounting shell, a sliding block is provided on the inner side of the connecting frame, a sliding groove is provided on the measuring frame, the sliding block is slidably clamped in the sliding groove, and a top screw is screwed on the connecting frame, and the top screw abuts against the measuring frame.

[0015] In a preferred embodiment, the bottom of the mounting shell protrudes out of the measuring frame, a protective pad is provided at the bottom of the mounting shell, the width of the slide groove is greater than the width of the slider, an abutment block is slidably provided in the connecting frame, a first elastic member is provided between the abutment block and the connecting frame, and the abutment block and the slider abut against both sides of the slide groove respectively.

[0016] In a preferred embodiment, the linkage mechanism includes:

[0017] An installation shaft is arranged on the winding shaft and is coaxially connected thereto, and a connecting sleeve is provided on the installation shaft so as to be rotatable along its axis;

[0018] a one-way driving assembly, disposed on the mounting shaft and connected to the connecting sleeve to drive the connecting sleeve to rotate in one direction; and

[0019] The transmission assembly is arranged on the connecting sleeve and connected to the display wheel to convert the rotation of the connecting sleeve into driving the rotation of the display wheel.

[0020] In a preferred embodiment, the one-way drive assembly includes:

[0021] A first ratchet plate, slidably disposed on the mounting shaft along the axis of the mounting shaft;

[0022] A second ratchet disc, disposed at an end of the connecting sleeve and meshing with the first ratchet disc; and

[0023] The second elastic member is arranged between the first ratchet plate and the winding shaft.

[0024] In a preferred embodiment, a limit block is provided on the first ratchet disc, a limit slot is provided on the mounting shaft along its axis, and the limit block is slidably mounted in the limit slot.

[0025] In a preferred embodiment, the locking mechanism includes:

[0026] A second constant force spring is arranged on the connecting sleeve, and two ends of the second constant force spring are respectively fixedly connected to the connecting sleeve and the mounting shell;

[0027] A ratchet gear, arranged on the connecting sleeve;

[0028] A ratchet pawl is rotatably disposed in the mounting housing and connected thereto via a torsion spring, and the ratchet pawl is clamped on the ratchet gear; and

[0029] The knob is arranged on the pawl and extends out of the mounting shell.

[0030] In a preferred embodiment, a push block is provided on the pawl, and an inclined platform is provided on the first ratchet plate, and the push block can abut against the inclined platform.

[0031] In a preferred embodiment, the transmission assembly includes:

[0032] A first synchronous wheel, arranged on the connecting sleeve;

[0033] A second synchronization wheel, disposed on the display wheel, wherein the diameter of the second synchronization wheel is larger than that of the first synchronization wheel; and

[0034] A synchronous belt is sleeved on the first synchronous wheel and the second synchronous wheel.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] When the device is used, the strap at the end of the measuring frame is set on the sole of the foot, so that the measuring frame is parallel to the tibia of the calf, and multiple groups of mounting shells are in contact with the calf, and the measurement work can be carried out. The position of the mounting shell on the measuring frame is adjustable, so it is convenient to measure the leg circumference at different positions. During the measurement process, by pulling the measuring belt and winding it on the calf, the measuring belt drives the winding shaft to rotate during the pulling process, and the winding shaft drives the display wheel to rotate through the linkage mechanism during the rotation process, and then the length of the leg circumference can be obtained by observing the indication of the display wheel. The measuring belt can be retracted by controlling the reverse rotation of the winding shaft, and the display wheel is locked in position by the locking mechanism after rotation, until the next measurement, the last measurement data can be timely obtained, and the display wheel can be reset by controlling the locking mechanism to measure again, so that the two adjacent measurement data can be well compared without recording data to know the change of the patient's leg circumference, which is convenient for timely adjustment of the treatment method and intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0038] Figure 1 A schematic diagram of the three-dimensional structure of a leg circumference measuring device provided by the present invention;

[0039] Figure 2 It is a structural schematic diagram of an installation shell in a leg circumference measuring device of the present invention;

[0040] Figure 3 It is a schematic diagram of the internal structure of a connecting frame in a leg circumference measuring device of the present invention;

[0041] Figure 4 It is a schematic diagram of the internal structure of a mounting shell in a leg circumference measuring device of the present invention;

[0042] Figure 5 It is a schematic diagram of the installation structure of a measuring belt in a leg circumference measuring device of the present invention;

[0043] Figure 6 It is a cross-sectional view of a first ratchet disc in a leg circumference measuring device of the present invention;

[0044] Figure 7 The figure is a schematic structural diagram of a second ratchet disk in a leg circumference measuring device of the present invention.

[0045] Reference numerals:

[0046] 101. measuring frame; 102. slideway; 103. binding belt;

[0047] 201, mounting shell; 202, protective pad; 203, connecting frame; 204, sliding block; 205, first elastic member; 206, abutting block; 207, top screw;

[0048] 301, winding shaft; 302, measuring tape; 303, mounting shaft; 304, limiting groove; 305, first constant force spring;

[0049] 401, first ratchet plate; 402, limit block; 403, ramp; 404, second elastic member;

[0050] 501, connecting sleeve; 502, second ratchet plate; 503, ratchet gear; 504, first synchronous wheel; 505, second constant force spring; 506, knob; 507, ratchet pawl; 508, torsion spring; 509, push block;

[0051] 601, second synchronous wheel; 602, synchronous belt; 603, display wheel; 604, indicator line. DETAILED DESCRIPTION

[0052] The present invention is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technicians in this field can make some non-essential improvements and adjustments to the present invention based on the above application content.

[0053] Example:

[0054] like Figures 1 to 4 As shown, the present invention provides a leg circumference measuring device, including a measuring frame 101, a strap 103 is provided at the end of the measuring frame 101, a plurality of mounting shells 201 are slidably provided on the measuring frame 101, a connecting frame 203 is provided on the mounting shell 201, a slider 204 is provided inside the connecting frame 203, a slide groove 102 is provided on the measuring frame 101, the slider 204 is slidably clamped in the slide groove 102, a top screw 207 is also screwed on the connecting frame 203, and the top screw 207 abuts against the measuring frame 101. The bottom of the mounting shell 201 protrudes outside the measuring frame 101, a protective pad 202 is provided at the bottom of the mounting shell 201, the width of the slide groove 102 is greater than the width of the slider 204, an abutting block 206 is slidably provided in the connecting frame 203, a first elastic member 205 is provided between the abutting block 206 and the connecting frame 203, and the abutting block 206 and the slider 204 abut against both sides of the slide groove 102 respectively.

[0055] When in use, the strap 103 at the end of the measuring frame 101 is sleeved on the sole of the patient, and the strap 103 can be made of elastic material, and then the measuring frame 101 is moved to be parallel to the tibia of the calf to improve the accuracy of measurement. The connecting frame 203 can be slid on the measuring frame 101 to adjust the measurement position. In the process of adjusting the measuring frame 101, the measuring frame 101 can be made as close to the tibia as possible, so that the protective pads 202 at the bottom of the multiple sets of mounting shells 201 are all in contact with the calf of the patient, and in the process of adjustment, the slider 204 moves to compress the first elastic member 205, so that the bottom of the mounting shell 201 fits the calf as much as possible, further improving the accuracy of the measurement data. After the adjustment is completed, the top screw 207 can be rotated to make it abut against the measuring frame 101 to increase the height of the mounting shell 201 on the measuring frame 101, so that there is no need to adjust the position again in the subsequent measurement process, and the leg circumference change can be intuitively known, and the leg circumference data comparison of the fixed position is convenient.

[0056] like Figure 4 , 5 As shown, in this embodiment, a winding shaft 301 is rotatably provided in the mounting shell 201, a measuring tape 302 is wound on the winding shaft 301, the end of the measuring tape 302 extends out of the mounting shell 201, a first constant force spring 305 is provided on the winding shaft 301, and the two ends of the first constant force spring 305 are respectively fixedly connected to the winding shaft 301 and the mounting shell 201. The measuring tape 302 can be pulled out and wound around the calf for measurement, and a scale can be added to the measuring tape 302 to improve the measurement accuracy. In the process of pulling out the measuring tape 302, the winding shaft 301 is driven to rotate and the first constant force spring 305 is deformed, and after the measurement is completed, the winding shaft 301 is controlled to reverse under the action of the first constant force spring 305 to automatically retract the measuring tape 302.

[0057] like Figures 4 to 7As shown, in this embodiment, a rotatable display wheel 603 is arranged in the mounting shell 201, the display wheel 603 is exposed outside the mounting shell 201, scale lines are arranged on the peripheral side of the display wheel 603, an indication line 604 is arranged on the mounting shell 201, and a linkage mechanism connected to the display wheel 603 is arranged on the winding shaft 301, and the rotation of the winding shaft 301 in a single direction is converted into driving the display wheel 603 to rotate through the linkage mechanism. The linkage mechanism includes a mounting shaft 303 arranged on the winding shaft 301 and coaxially connected thereto, a connecting sleeve 501 is rotatably sleeved on the mounting shaft 303 along its axis, and a one-way driving component connected to the connecting sleeve 501 is arranged on the mounting shaft 303, and the connecting sleeve 501 is driven to rotate in one direction through the one-way driving component. The one-way drive assembly includes a first ratchet plate 401 slidably arranged on the mounting shaft 303 along the axis of the mounting shaft 303 and a second ratchet plate 502 arranged at the end of the connecting sleeve 501. The second ratchet plate 502 is meshed with the first ratchet plate 401, and a second elastic member 404 is arranged between the first ratchet plate 401 and the winding shaft 301.

[0058] When the winding shaft 301 is driven to rotate during the measurement process, since a limit block 402 is arranged on the first ratchet disk 401 and a limit groove 304 is provided on the mounting shaft 303 along its axis, the limit block 402 is slidably clamped in the limit groove 304, so that the winding shaft 301 can drive the first ratchet disk 401 to follow the rotation during the rotation, and the first ratchet disk 401 can slide on the mounting shaft 303. Under the action of the second elastic member 404, the first ratchet disk 401 is always engaged with the second ratchet disk 502 and drives the second ratchet disk 502 to rotate. When the winding shaft 301 is reset, the first ratchet disk 401 is pushed to slide along the mounting shaft 303 by the inclined surfaces of the ratchet teeth on the first ratchet disk 401 and the second ratchet disk 502 to control the unidirectional rotation of the second ratchet disk 502.

[0059] like Figure 4 As shown, in this embodiment, the linkage mechanism further includes a transmission assembly, which is arranged on the connecting sleeve 501 and connected to the display wheel 603, so as to convert the rotation of the connecting sleeve 501 into the rotation of the driving display wheel 603. The transmission assembly includes a first synchronous wheel 504 arranged on the connecting sleeve 501, and a second synchronous wheel 601 is arranged on the display wheel 603. The diameter of the second synchronous wheel 601 is larger than that of the first synchronous wheel 504, and the first synchronous wheel 504 and the second synchronous wheel 601 are connected by a synchronous belt 602. The connecting sleeve 501 drives the first synchronous wheel 504 to rotate during the rotation process, and drives the display wheel 603 to rotate under the action of the synchronous belt 602 and the second synchronous wheel 601, and then the size of the leg circumference is known through the corresponding values ​​on the display wheel 603 and the indicator line 604.

[0060] like Figures 4 to 7As shown, in this embodiment, a locking mechanism is provided in the mounting shell 201, and the position of the display wheel 603 after rotation can be selectively locked and reset by the locking mechanism. The locking mechanism includes a second constant force spring 505 provided on the connecting sleeve 501, and the two ends of the second constant force spring 505 are respectively fixedly connected to the connecting sleeve 501 and the mounting shell 201, and a ratchet gear 503 is provided on the connecting sleeve 501, and a rotatable pawl 507 is provided in the mounting shell 201, and the pawl 507 is connected to the mounting shell 201 through a torsion spring 508, and the pawl 507 is clamped on the ratchet gear 503, and a knob 506 is provided on the end of the pawl 507 extending out of the mounting shell 201, and a push block 509 is provided on the pawl 507, and an inclined platform 403 is provided on the first ratchet plate 401, and the push block 509 can abut against the inclined platform 403.

[0061] In the process of the second ratchet disk 502 being driven to rotate by the first ratchet disk 401, the position of the connecting sleeve 501 is locked through the cooperation of the pawl 507 and the torsion spring 508, thereby locking the position of the display wheel 603. Even when the measuring tape 302 is retracted, the position of the display wheel 603 will not change, thereby retaining the data of a single measurement. When measuring next time, the pawl 507 can be driven to rotate and disengage from the ratchet gear 503 by rotating the knob 506, and the push block 509 can be driven to move and abut against the inclined table 403, so that the first ratchet disk 401 moves and disengages from the second ratchet disk 502. The connecting sleeve 501 can be controlled to reset under the action of the second constant force spring 505, so as to control the reset of the display wheel 603, in preparation for the next measurement. The data of the previous measurement can be immediately known during the next measurement, so that the data of two adjacent groups of measurements can be compared conveniently.

[0062] Specific usage and beneficial effects of the present invention:

[0063] When the device is in use, the strap 103 at the end of the measuring frame 101 is placed on the sole of the foot, so that the measuring frame 101 is parallel to the tibia of the calf, and multiple groups of mounting shells 201 are in contact with the calf, and the measurement work can be carried out. The position of the mounting shell 201 on the measuring frame 101 is adjustable, so as to facilitate the measurement of leg circumferences at different positions. During the measurement process, the measuring belt 302 is pulled and wound around the calf. The measuring belt 302 drives the winding shaft 301 to rotate during the pulling process. The winding shaft 301 drives the display wheel 603 to rotate through the linkage mechanism during the rotation process. Then, the length of the leg circumference can be known by observing the indication of the display wheel 603. The measuring belt 302 can be retracted by controlling the winding shaft 301 to rotate in the opposite direction. After the display wheel 603 rotates, its position is locked by the locking mechanism. Until the next measurement, the last measurement data can be timely known. The display wheel 603 can be reset and measured again by controlling the locking mechanism. The two adjacent measurement data can be well compared without recording the data to know the change in the patient's leg circumference, so that the treatment method and intensity can be adjusted in time, thereby effectively improving the treatment effect. The application range is wide and suitable for different patients.

[0064] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments. On the basis of the present invention, some modifications or improvements can be made thereto, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A leg circumference measuring device, characterized in that: Included are: A measuring frame (101), wherein a binding belt (103) is provided at an end of the measuring frame (101); A plurality of mounting shells (201) are provided, and all are slidably disposed on the measuring frame (101); A winding shaft (301) is rotatably arranged along its axis in the mounting shell (201), a measuring tape (302) is wound on the winding shaft (301), and an end of the measuring tape (302) extends out of the mounting shell (201); A display wheel (603) is rotatably arranged along its axis in the mounting shell (201) and exposed to the outside, the peripheral side of the display wheel (603) is provided with scale lines, and the mounting shell (201) is provided with an indication line (604); a linkage mechanism, arranged on the winding shaft (301) and connected to the display wheel (603), wherein the rotation of the winding shaft (301) in a single direction is converted into driving the display wheel (603) to rotate through the linkage mechanism; and A locking mechanism is arranged in the mounting shell (201) to selectively lock and reset the position of the display wheel (603) after rotation.

2. A leg circumference measuring device according to claim 1, characterized in that: The winding shaft (301) is provided with a first constant force spring (305), and two ends of the first constant force spring (305) are respectively fixedly connected to the winding shaft (301) and the mounting shell (201).

3. A leg circumference measuring device according to claim 1, characterized in that: The mounting shell (201) is provided with a connecting frame (203), the inner side of the connecting frame (203) is provided with a sliding block (204), the measuring frame (101) is provided with a sliding groove (102), the sliding block (204) is slidably mounted in the sliding groove (102), the connecting frame (203) is also screwed with a top screw (207), and the top screw (207) is in contact with the measuring frame (101).

4. A leg circumference measuring device according to claim 3, characterized in that: The bottom of the mounting shell (201) protrudes out of the measuring frame (101); a protective pad (202) is arranged at the bottom of the mounting shell (201); the width of the slide groove (102) is greater than the width of the slider (204); an abutment block (206) is slidably arranged in the connecting frame (203); a first elastic member (205) is arranged between the abutment block (206) and the connecting frame (203); and the abutment block (206) and the slider (204) are respectively abutted against two sides of the slide groove (102).

5. The leg circumference measuring device according to claim 1, characterized in that: The linkage mechanism comprises: A mounting shaft (303) is arranged on the winding shaft (301) and is coaxially connected thereto, and a connecting sleeve (501) is provided on the mounting shaft (303) so as to be rotatable along its axis; a one-way driving assembly, arranged on the installation shaft (303) and connected to the connecting sleeve (501) to drive the connecting sleeve (501) to rotate in one direction; and A transmission assembly is arranged on the connecting sleeve (501) and connected to the display wheel (603) so as to convert the rotation of the connecting sleeve (501) into driving the rotation of the display wheel (603).

6. A leg circumference measuring device according to claim 5, characterized in that: The one-way drive assembly comprises: A first ratchet plate (401) is slidably disposed on the mounting shaft (303) along the axis of the mounting shaft (303); A second ratchet plate (502) is disposed at the end of the connecting sleeve (501) and is meshed with the first ratchet plate (401); and The second elastic member (404) is arranged between the first ratchet plate (401) and the winding shaft (301).

7. A leg circumference measuring device according to claim 6, characterized in that: A limiting block (402) is arranged on the first ratchet disc (401), a limiting groove (304) is provided on the installation shaft (303) along its axis, and the limiting block (402) is slidably locked in the limiting groove (304).

8. A leg circumference measuring device according to claim 6, characterized in that: The locking mechanism comprises: A second constant force spring (505) is arranged on the connecting sleeve (501), and two ends thereof are fixedly connected to the connecting sleeve (501) and the mounting shell (201) respectively; A ratchet gear (503), arranged on the connecting sleeve (501); A ratchet pawl (507) is rotatably disposed in the mounting shell (201) and connected thereto via a torsion spring (508), and the ratchet pawl (507) is clamped on the ratchet gear (503); and The knob (506) is arranged on the pawl (507) and extends out of the mounting shell (201).

9. A leg circumference measuring device according to claim 8, characterized in that: The ratchet pawl (507) is provided with a push block (509), the first ratchet plate (401) is provided with an inclined platform (403), and the push block (509) can abut against the inclined platform (403).

10. The leg circumference measuring device according to claim 5, characterized in that: The transmission assembly comprises: A first synchronous wheel (504), arranged on the connecting sleeve (501); A second synchronization wheel (601) is arranged on the display wheel (603), wherein the diameter of the second synchronization wheel (601) is larger than that of the first synchronization wheel (504); and A synchronous belt (602) is sleeved on the first synchronous wheel (504) and the second synchronous wheel (601).

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