Portable leg circumference measurer

Abstract

The utility model discloses a portable leg circumference measurer, which belongs to the technical field of leg circumference measuring tools, and comprises a shell, a winding wheel is rotatably connected inside the shell, a flexible rule is wound outside the winding wheel, the starting end of the flexible rule is positioned outside the shell, a measuring arm is rotatably connected above the winding wheel in the shell, and the measuring arm is connected with the winding wheel. The flexible rule is directly pulled out to surround the outside of the leg, the electronic meter can measure the length of the flexible rule through the conduction wheel in the process of pulling out the flexible rule, then the leg circumference is measured, then measured data are displayed through the displayer, the leg circumference can be rapidly and accurately measured through the mode, and errors are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of leg circumference measuring tools, in particular to a portable leg circumference measurer. Background Technique

[0002] When admitting patients, for symptoms such as leg swelling caused by certain diseases, doctors need to regularly measure and record the leg circumference of patients, and judge the condition by observing the change of the leg circumference; the existing method for measuring the leg circumference mainly measures the patient's leg with a tape measure, and errors are often caused by human factors during the measurement, which is likely to affect the doctor's judgment of the patient's condition. Therefore, the utility model provides a portable leg circumference measurer to solve the above-mentioned problems. Content of the Utility Model

[0003] The purpose of the utility model is to provide a portable leg circumference measurer to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A portable leg circumference measurer includes a housing. A winding wheel is rotatably connected inside the housing. A flexible ruler is wound around the outside of the winding wheel. The starting end of the flexible ruler is located outside the housing. A measuring arm is rotatably connected inside the housing above the winding wheel. An electronic meter for measuring the length of the flexible ruler is fixedly connected to the side wall of the measuring arm. The lower end of the measuring roller inside the electronic meter is in contact with a conduction wheel. The conduction wheel is rotatably connected to the measuring arm, and the flexible ruler is attached to the outer wall of the conduction wheel. A display for displaying the data of the electronic meter is also fixedly connected to the front end of the housing.

[0006] As a further scheme of the utility model, marking points are arranged on the outer wall of the conduction wheel, and the starting section of the scale of the flexible ruler is aligned with the marking points. More specifically, there is no scale for the distance from the scale point of the flexible ruler to the limiting rod.

[0007] As a further scheme of the utility model, an installation groove is opened inside the housing. A rotating shaft is rotatably connected inside the installation groove. The rotating shaft is clamped inside the winding wheel. A torsion spring for driving the rotating shaft to reset is installed inside the installation groove.

[0008] As a further scheme of the utility model, a support column for supporting the flexible ruler slides inside the housing. The flexible ruler can be kept in a taut state through the support column, thereby avoiding the separation of the flexible ruler from the conduction wheel. A support rod is fixedly connected below the support column. A torsion spring is sleeved outside the support rod. The torsion spring is in a "V" shape, and one end of the torsion spring is fixedly connected to the housing, and the other end abuts against the bottom end of the support column.

[0009] As a further solution of the present utility model, a rotating shaft is fixedly connected to the upper end of the measuring arm, the rotating shaft is rotatably connected to the outer shell, a torsion spring is sleeved outside the rotating shaft, a elastic block is slidably connected to the front end of the measuring arm, a return spring is fixedly connected between the elastic block and the measuring arm, a limiting window is opened at the front end of the outer shell, and the elastic block is clamped in the limiting window.

[0010] As a further solution of the present utility model, a large window is opened at the right end of the outer shell, and the measuring arm can pass through the outer shell through the large window.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. When the present utility model is used, the flexible ruler is directly pulled out and wound around the outside of the leg. During the process of pulling out the flexible ruler, the electronic meter can measure the length of the flexible ruler through the conduction wheel, and then measure the leg circumference. Then, the measured data is displayed through the display. In this way, the leg circumference can be measured quickly and accurately, avoiding errors.

[0013] 2. When the present utility model is used, the measuring arm can also be directly taken out and the conduction wheel is attached to the leg, and then the conduction wheel is rolled around the leg to measure the leg circumference. In this way, the leg circumference can be measured accurately and quickly. Description of the Drawings

[0014] Figure 1 It is a structural schematic diagram of a portable leg circumference measuring device.

[0015] Figure 2 It is an unfolded view of a portable leg circumference measuring device.

[0016] Figure 3 It is a disassembled view of a portable leg circumference measuring device.

[0017] Figure 4 It is an internal structure diagram of a portable leg circumference measuring device.

[0018] In the figure: 1. Outer shell; 2. Display; 3. Installation groove; 4. Torsion spring piece; 5. Rotating shaft; 6. Winding wheel; 7. Flexible ruler; 8. Limiting rod; 9. Support rod; 10. Elastic torsion spring; 11. Support column; 12. Chute; 13. Measuring arm; 14. Rotating shaft; 15. Electronic meter; 16. Measuring roller; 17. Conduction wheel; 18. Elastic block; 19. Limiting window; 20. Marking point. Detailed Embodiment

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1 to 4 , in the embodiment of the present invention, a portable leg circumference measuring device includes a housing 1. A winding wheel 6 is rotatably connected inside the housing 1. A flexible ruler 7 is wound around the outside of the winding wheel 6. The starting end of the flexible ruler 7 is located outside the housing 1. Specifically, a large window is opened at the left end of the housing 1. The flexible ruler 7 passes through the housing 1 through the large window, and a limiting rod 8 is fixedly connected to the outside of the housing 1 where the flexible ruler 7 is located. The limiting rod 8 can prevent the flexible ruler 7 from retracting into the housing 1. Above the winding wheel 6, a measuring arm 13 is rotatably connected inside the housing 1. An electronic meter 15 for measuring the length of the flexible ruler 7 is fixedly connected to the side wall of the measuring arm 13. The electronic meter 15 is a roller type rangefinder. The roller type rangefinder is a prior art and will not be specifically described here. The lower end of the measuring roller 16 inside the electronic meter 15 is in contact with a conduction wheel 17. The conduction wheel 17 is rotatably connected to the measuring arm 13, and the flexible ruler 7 is attached to the outer wall of the conduction wheel 17. A display 2 for displaying the data of the electronic meter 15 is also fixedly connected to the front end of the housing 1. Specifically, a marking point 20 is provided on the outer wall of the conduction wheel 17. The 0 scale starting section of the flexible ruler 7 is aligned with the marking point 20. More specifically, there is no scale for the distance from the 0 scale point of the flexible ruler 7 to the limiting rod 8;

[0021] Specifically, an installation groove 3 is opened inside the housing 1. A rotating shaft 5 is rotatably connected inside the installation groove 3. The rotating shaft 5 is clamped inside the winding wheel 6. A torsion spring piece 4 for driving the rotating shaft 5 to reset is installed inside the installation groove 3. More specifically, the starting end of the torsion spring piece 4 is fixedly connected to the housing 1, and the end of the torsion spring piece 4 is fixedly connected to the rotating shaft 5. A jack is opened in the middle of the winding wheel 6, and a limiting groove is opened on the inner wall of the jack. A raised block is fixedly connected to the outer wall of the rotating shaft 5, and the raised block is slidably connected in the limiting groove;

[0022] A support column 11 for supporting the flexible ruler 7 slides inside the housing 1. The flexible ruler 7 can be kept in a taut state through the support column 11, thereby preventing the flexible ruler 7 from separating from the conduction wheel 17. A support rod 9 is fixedly connected below the support column 11. A torsion spring 10 is sleeved outside the support rod 9. Specifically, refer to Figure 4, the elastic torsion spring 10 is in a "V" shape, and one end of the elastic torsion spring 10 is fixedly connected to the outer shell 1, and the other end abuts against the bottom end of the support column 11, so as to give an upward force to the support column 11 through the elastic torsion spring 10, thereby making the flexible ruler 7 in a taut state;

[0023] Specifically, sliding grooves 12 are symmetrically opened inside the outer shell 1, and both ends of the support column 11 are slidably connected in the sliding grooves 12.

[0024] Embodiment 2: Please refer to Figure 2 , 3 , 4. Based on Embodiment 1, a rotating shaft 14 is fixedly connected to the upper end of the measuring arm 13. The rotating shaft 14 is rotatably connected to the outer shell 1, and a torsion spring is sleeved outside the rotating shaft 14. A large window is opened at the right end of the outer shell 1. The measuring arm 13 can pass through the outer shell 1 through the large window. An elastic block 18 is slidably connected to the front end of the measuring arm 13. A return spring is fixedly connected between the elastic block 18 and the measuring arm 13. A limiting window 19 is opened at the front end of the outer shell 1, and the elastic block 18 is clamped in the limiting window 19.

[0025] The working principle of the present utility model is:

[0026] When the present utility model is used, the flexible ruler 7 can be directly pulled out and then wound around the leg once starting from the 0 scale to measure the leg circumference. When the flexible ruler 7 is pulled out, the conduction wheel 17 will drive the metering roller 16 to rotate, so as to measure the length of the flexible ruler 7 pulled out through the electronic meter 15, and then display the leg circumference through the display 2. In this way, the leg circumference can be measured quickly and accurately, avoiding errors;

[0027] Moreover, when in use, the elastic block 18 can also be pressed towards the inside of the outer shell 1. When the elastic block 18 is pressed, it will disengage from the limiting window 19. After the elastic block 18 disengages from the limiting window 19, the measuring arm 13 will pop out of the outer shell 1 under the action of the torsion spring, and then the conduction wheel 17 is brought into contact with the leg and rolls around the leg to measure the leg circumference. In this way, the leg circumference can be measured more conveniently, thereby increasing the practicability of the present utility model.

[0028] The above is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent replacements or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A portable leg circumference measuring device, comprising a housing (1), characterized in that, A winding wheel (6) is rotatably connected inside the housing (1). A flexible ruler (7) is wound around the outside of the winding wheel (6). The starting end of the flexible ruler (7) is located outside the housing (1). Above the winding wheel (6), a measuring arm (13) is rotatably connected inside the housing (1). An electronic meter (15) for measuring the length of the flexible ruler (7) is fixedly connected to the side wall of the measuring arm (13). The lower end of a measuring roller (16) inside the electronic meter (15) is in contact with a conduction wheel (17). The conduction wheel (17) is rotatably connected to the measuring arm (13), and the flexible ruler (7) is attached to the outer wall of the conduction wheel (17). A display (2) for displaying the data of the electronic meter (15) is also fixedly connected to the front end of the housing (1).

2. The portable leg circumference measuring device according to claim 1, wherein Marking points (20) are provided on the outer wall of the conduction wheel (17). The (0) scale starting section of the flexible ruler (7) is aligned with the marking points (20). More specifically, there is no scale for the distance from the (0) scale point of the flexible ruler (7) to the limit rod (8).

3. A portable leg circumference measuring device according to claim 1, characterized in that, An installation groove (3) is formed inside the housing (1). A rotating shaft (5) is rotatably connected inside the installation groove (3). The rotating shaft (5) is clamped inside the winding wheel (6). A torsion spring piece (4) for driving the rotating shaft (5) to reset is installed inside the installation groove (3).

4. The portable leg circumference measuring device according to claim 3, characterized in that, A support column (11) for supporting the flexible ruler (7) slides inside the housing (1). The flexible ruler (7) can be kept in a taut state by the support column (11), thereby preventing the flexible ruler (7) from separating from the conduction wheel (17). A support rod (9) is fixedly connected below the support column (11). An elastic torsion spring (10) is sleeved on the outside of the support rod (9). The elastic torsion spring (10) is in a "V" shape, and one end of the elastic torsion spring (10) is fixedly connected to the housing (1), and the other end abuts against the bottom end of the support column (11).

5. The portable leg circumference measuring device according to claim 1, characterized in that, A rotating shaft (14) is fixedly connected to the upper end of the measuring arm (13). The rotating shaft (14) is rotatably connected to the housing (1), and a torsion spring is sleeved on the outside of the rotating shaft (14). An elastic block (18) slides on the front end of the measuring arm (13). A return spring is fixedly connected between the elastic block (18) and the measuring arm (13). A limiting window (19) is formed at the front end of the housing (1). The elastic block (18) is clamped inside the limiting window (19).

6. The portable leg circumference measuring device according to claim 5, wherein, A giant window is formed at the right end of the housing (1). The measuring arm (13) can pass through the housing (1) through the giant window.

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