Measuring ruler

Abstract

The main object of the present invention is to provide a measuring ruler, which includes a scale, a pointer and a measuring rod. A plurality of measuring scales are provided on the scale; the pointer is arranged relative to the scale in a swingable manner so that the pointer indicates the corresponding measuring scale on the scale; the measuring rod is used to correspond and cooperate with the tibial osteotomy plane. The measuring rod is connected to the scale or the pointer to drive the scale or the pointer to swing, so as to obtain the posterior inclination angle of the tibial osteotomy plane through the scale and the pointer. The measuring ruler in the present invention can accurately reflect the inclination angle of the tibial osteotomy plane through the cooperation of the measuring rod and the tibial osteotomy plane, and the pointer indicates the corresponding scale on the scale, enabling the measurer to accurately obtain the posterior inclination angle of the tibial osteotomy plane, solving the problem in the prior art that the posterior inclination angle of the tibial osteotomy plane cannot be accurately measured.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and more particularly, to a measuring ruler. Background Art

[0002] In artificial knee joint replacement surgery, the posterior tilt angle of the tibial osteotomy plane is one of the important dimensions for total knee arthroplasty. Since there will be errors in the posterior tilt angle of the intercepted tibial osteotomy plane, the surgical quality is reduced, and even the surgery fails, resulting in unpredictable catastrophic risks. At this time, a safe and easy-to-use measuring tool is needed to accurately measure in time during the surgery whether the posterior tilt angle of the intercepted tibial plateau osteotomy plane is accurate, so that the doctor can use the measurement result as a reference to correct the possible errors.

[0003] In previous total knee replacements, due to the lack of a dedicated measuring tool, doctors often could not measure the posterior tilt angle of the tibial osteotomy plane, or could only estimate by eye. Such a surgical process is prone to risks, reducing the surgical quality and bringing more pain to the patient, which is intolerable.

[0004] Although some companies can provide some simple tools without scales to solve this problem, due to many factors such as usage methods, the effect is very poor. Summary of the Invention

[0005] The main object of the present invention is to provide a measuring ruler to solve the problem in the prior art that the posterior tilt angle of the tibial osteotomy plane cannot be accurately measured.

[0006] To achieve the above object, the present invention provides a measuring ruler, including: a scale, a pointer, and a measuring rod. Multiple measuring scales are provided on the scale; the pointer is swingably arranged relative to the scale so that the pointer indicates the corresponding measuring scale on the scale; the measuring rod is used to correspond and cooperate with the tibial osteotomy plane, and the measuring rod is connected to the scale or the pointer to drive the scale or the pointer to swing, so as to obtain the posterior tilt angle of the tibial osteotomy plane through the scale and the pointer.

[0007] Furthermore, an installation hole for installing the measuring rod is provided on the scale, and the measuring rod is slidably inserted into the installation hole so that the measuring rod drives the scale to swing.

[0008] Furthermore, a measuring plate is provided on the measuring rod, and the measuring rod contacts the tibial osteotomy plane through the measuring plate.

[0009] Furthermore, the measuring rod includes a straight rod section and a bent pipe section. The straight rod section is slidably connected to the scale; one end of the bent pipe section is connected to the straight rod section, and the measuring plate is arranged at the other end of the bent pipe section.

[0010] Further, the scale includes a mounting portion and a scale portion provided with measurement scales, which are connected to each other. The measuring rod is slidably inserted through the mounting portion to drive the scale to swing.

[0011] Further, a connecting pin is inserted through the pointer and the mounting portion so that the pointer and the scale are relatively swingably arranged.

[0012] Further, the measuring scale further includes a sleeve. At least part of the pointer is vertically adjustably mounted in the sleeve to adjust the vertical height of the pointer.

[0013] Further, the measuring scale further includes a locking member. The locking member is mounted on the sleeve, and at least part of the locking member is connected to the pointer to lock the pointer in the sleeve.

[0014] Further, a locking and positioning portion is provided on the sleeve. A positioning threaded hole is provided on the locking and positioning portion. The locking member has a screw portion that cooperates with the positioning threaded hole; the positioning threaded hole extends along the radial direction of the sleeve so that the end of the screw portion abuts against the pointer.

[0015] Further, the pointer has a fixing portion and an indicating portion for indicating the measurement scale. The indicating portion is located above the fixing portion. The fixing portion is inserted into the sleeve to adjust the vertical height of the pointer by adjusting the length of the fixing portion inserted into the sleeve.

[0016] Further, both the indicating portion and the fixing portion are rod-shaped, and the indicating portion is arranged parallel to the fixing portion; the pointer has an avoidance portion, and the avoidance portion is located between the indicating portion and the fixing portion to connect the indicating portion and the fixing portion.

[0017] The measuring scale applying the technical solution of the present invention includes a scale, a pointer and a measuring rod. The measuring rod is connected to the scale or the pointer. During measurement, the measuring rod is rotated to cooperate with the tibial osteotomy plane. When the measuring rod rotates, it drives the scale or the pointer to rotate, so that a relative rotation is formed between the scale and the pointer. At this time, the scale indicated by the pointer on the scale is the angle of relative rotation between the scale and the pointer, and this scale is also the posterior inclination angle of the tibial osteotomy plane; the measuring scale of the present invention can accurately reflect the inclination angle of the tibial osteotomy plane through the cooperation of the measuring rod and the tibial osteotomy plane, and the corresponding scale on the scale is indicated by the pointer, so that the measurer can accurately obtain the posterior inclination angle of the tibial osteotomy plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0019] Figure 1 shows a schematic structural diagram of the measuring scale according to the present invention;

[0020] Figure 2 The figure shows the usage state diagram of the measuring ruler in the present invention when measuring the posterior inclination angle of the tibial osteotomy plane.

[0021] Among them, the above-mentioned drawings include the following reference numerals:

[0022] 1. Scale; 11. Mounting part; 12. Scale part; 2. Measuring rod; 21. Straight rod section; 22. Bent pipe section; 3. Measuring plate; 4. Sleeve; 41. Locking and positioning part; 5. Locking part; 51. Screw part; 6. Tibial osteotomy plane; 7. Pointer; 71. Indicating part; 72. Fixing part; 73. Avoiding part; 8. Pin. Detailed implementation manners

[0023] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0024] The present invention provides a measuring ruler. Please refer to Figure 1 and Figure 2 , the measuring ruler includes: a scale 1, a pointer 7 and a measuring rod 2. A plurality of measuring scales are provided on the scale 1; the pointer 7 is arranged relative to the scale 1 so as to be swingable, so that the pointer 7 indicates the corresponding measuring scale on the scale 1; the measuring rod 2 is used to cooperate with the tibial osteotomy plane 6 correspondingly. The measuring rod 2 is connected to the scale 1 or the pointer 7 to drive the scale 1 or the pointer 7 to swing, so as to obtain the posterior inclination angle of the tibial osteotomy plane 6 through the scale 1 and the pointer 7.

[0025] The measuring ruler in the present invention includes a scale 1, a pointer 7 and a measuring rod 2. The measuring rod 2 is connected to the scale 1 or the pointer 7. During measurement, the measuring rod 2 is rotated and cooperated with the tibial osteotomy plane 6. When the measuring rod 2 rotates, it drives the scale 1 or the pointer 7 to rotate, so that a relative rotation is formed between the scale 1 and the pointer 7. At this time, the angle through which the pointer 7 rotates relative to the scale 1 is the angle of the relative rotation between the scale and the pointer 7. Furthermore, the posterior inclination angle of the tibial osteotomy plane 6 can be obtained according to the measuring scale indicated by the pointer 7; the measuring ruler of the present invention can accurately reflect the inclination angle of the tibial osteotomy plane 6 through the cooperation of the measuring rod 2 and the tibial osteotomy plane 6, and the corresponding scale on the scale is indicated by the pointer, so that the measurer can accurately obtain the posterior inclination angle of the tibial osteotomy plane.

[0026] For the convenience of installing the measuring rod 2, as Figure 1 and Figure 2 shown, the scale 1 is provided with a mounting hole for installing the measuring rod 2, and the measuring rod 2 is slidably inserted into the mounting hole so that the measuring rod 2 drives the scale 1 to swing.

[0027] In this embodiment, it is selected to connect the measuring rod 2 with the scale 1. Specifically, there is an installation hole for installing the measuring rod 2 on the scale 1, and the measuring rod 2 is slidably inserted into the installation hole. When the measuring rod 2 rotates, it drives the scale 1 to rotate accordingly. At this time, the pointer 7 does not move, and the pointer 7 indicates the angle by which the scale 1 has rotated relative to the pointer 7. This angle is the posterior inclination angle of the tibial osteotomy plane 6.

[0028] As Figure 2 shown, a measuring plate 3 is provided on the measuring rod 2, and the measuring rod 2 contacts the tibial osteotomy plane 6 through the measuring plate 3.

[0029] In this embodiment, a measuring plate 3 is provided on the measuring rod 2 to better match the measuring rod 2 with the tibial osteotomy plane 6. The contact between the measuring rod 2 and the tibial osteotomy plane 6 through the measuring plate 3 can accurately reflect the posterior inclination angle of the tibial osteotomy plane.

[0030] Preferably, the measuring plate 3 has a measuring surface that matches the tibial osteotomy plane. When the measuring surface is completely attached to the tibial osteotomy plane 6, the scale indicated by the pointer 7 is the posterior inclination angle of the tibial osteotomy plane 6.

[0031] The measuring rod 2 includes a straight rod section 21 and a bent pipe section 22. The straight rod section 21 is slidably connected to the scale 1; one end of the bent pipe section 22 is connected to the straight rod section 21, and the measuring plate 3 is provided at the other end of the bent pipe section 22.

[0032] As Figure 2 shown, in this embodiment, the measuring rod 2 is divided into a straight rod section 21 and a bent pipe section 22. The straight rod section 21 is slidably inserted into the scale 1, facilitating the sliding connection between the measuring rod 2 and the scale 1; the measuring plate 3 is provided on the bent pipe section 22, making it convenient for the measuring plate 3 to cooperate with the tibial osteotomy plane 6.

[0033] The scale 1 includes a connected installation part 11 and a scale part 12 provided with measuring scales. The measuring rod 2 is slidably inserted into the installation part 11 to drive the scale 1 to swing.

[0034] As Figure 2 shown, the scale 1 in this embodiment includes an installation part 11 and a scale part 12. The installation part is connected to the measuring rod 2 to achieve the sliding connection between the measuring rod 2 and the installation part 11, and multiple measuring scales are provided on the scale part 12.

[0035] Preferably, the scale range on the scale 1 is from 0 degrees to 20°. When the measuring plate 3 is parallel to the horizontal plane, the pointer 7 indicates the measuring scale at 0° shown on the scale 1.

[0036] To achieve the connection between the pointer 7 and the scale 1, as Figure 2As shown, a connecting pin 8 is passed through the pointer 7 and the mounting portion 11 so that the pointer 7 and the scale 1 are swingably arranged relative to each other.

[0037] In this embodiment, a pin 8 is provided between the pointer 7 and the mounting portion 11, facilitating the hinged connection between the pointer 7 and the scale 1.

[0038] The measuring ruler further includes a sleeve 4. At least a part of the pointer 7 is vertically adjustably mounted in the sleeve 4 to adjust the vertical height of the pointer 7.

[0039] As Figure 1 and Figure 2 shown, the measuring ruler in the present invention further includes a sleeve 4. The pointer 7 is adjustably mounted in the sleeve 4 to facilitate adjusting the vertical height of the pointer 7, and further facilitating the measurement of the posterior inclination angle of the tibial osteotomy plane at different heights.

[0040] The measuring ruler further includes a locking member 5. The locking member 5 is mounted on the sleeve 4, and at least a part of the locking member 5 is connected to the pointer 7 to lock the pointer 7 in the sleeve 4.

[0041] In this embodiment, after adjusting the height of the pointer 7, the pointer 7 is locked on the sleeve 4 through the locking member 5, thereby realizing the connection between the pointer 7 and the sleeve 4.

[0042] The sleeve 4 is provided with a locking and positioning portion 41. The locking and positioning portion 41 is provided with a positioning threaded hole. The locking member 5 has a screw portion 51 that cooperates with the positioning threaded hole; the positioning threaded hole extends along the radial direction of the sleeve 4 so that the end of the screw portion 51 abuts against the pointer 7.

[0043] As Figure 1 and Figure 2 shown, by providing a locking and positioning portion 41 on the sleeve 4 and a screw portion 51 on the locking member 5 that cooperates with the locking and positioning portion, the screw portion 51 of the locking member is screwed into the positioning threaded hole of the locking and positioning portion 41, thereby realizing the specific connection between the locking member and the sleeve.

[0044] The pointer 7 has a fixing portion 72 and an indicating portion 71 for indicating the measurement scale. The indicating portion 71 is located above the fixing portion 72. The fixing portion 72 is inserted into the sleeve 4 to adjust the vertical height of the pointer 7 by adjusting the length of the fixing portion 72 inserted into the sleeve 4.

[0045] As Figure 1 shown, the pointer 7 includes a fixing portion 72 and an indicating portion 71. The pointer 7 is connected by inserting the fixing portion 72 into the sleeve 4, and the pointer is fixed in the sleeve by the locking member. In addition, the pointer is also provided with an indicating portion 71 for indicating the scale on the scale. The indicating portion 71 is a conical pointed head to facilitate the measurer to accurately read the scale indicated by the indicating portion.

[0046] Both the indicating part 71 and the fixing part 72 are rod-shaped, and the indicating part 71 is arranged parallel to the fixing part 72; the pointer 7 has an avoiding part 73, and the avoiding part 73 is located between the indicating part 71 and the fixing part 72 to connect the indicating part 71 and the fixing part 72. Preferably, the avoiding part 73 is a bent rod, so as to avoid other components.

[0047] As Figure 1 shown, the pointer 7 further includes an avoiding part 73, and the avoiding part 73 is located between the indicating part 71 and the fixing part 72, changing the structural position between the indicating part 71 and the fixing part 72, so that the measuring ruler has better adaptability. At the same time, arranging the indicating part 71 parallel to the fixing part 72 facilitates height adjustment.

[0048] The measuring ruler in the present invention is composed of a scale 1, a measuring rod 2, a measuring plate 3, a sleeve 4, a locking member 5, a pointer 7 and a connecting pin 8. The measuring rod 2 is fixedly connected to the measuring plate 3. The measuring rod 2 is slidably connected to the scale 1 to ensure that the measuring plate 3 can completely fit the tibial osteotomy plane in various situations, such as when the patient has a large tibial tuberosity. The scale pointer 7 is connected to the scale 1 through the connecting pin 8. When the measuring plate 3 can completely fit the tibial osteotomy plane, the scale pointer 7 swings to a specified position and indicates the posterior inclination angle of the tibial osteotomy plane. The scale range is from 0° to 15°, and the maximum can reach 20°. The measuring range is sufficient to accurately read the posterior inclination angles of tibial osteotomy planes of various sizes.

[0049] The scale pointer 7 is designed to be bent, which can not only avoid interference between the scale pointer 7 and the patient's soft tissues, but also magnify the swing amplitude of the scale pointer 7 to make the measurement more accurate. The sleeve 4 is slidably connected to the scale pointer 7 and can be locked by the locking member 5. The measuring ruler designed in this way can be applied to the measurement of the posterior inclination angle of the tibial osteotomy plane in various situations, such as surgical situations where the patient's tibia is longer or shorter.

[0050] In addition, the scale 1, the measuring rod 2, the measuring plate 3, the sleeve 4, the locking member 5, the pointer 7 and the pin 8 are made of medical stainless steel materials. The present invention maximally ensures the surgical quality and safety and saves surgical time.

[0051] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0052] (1) The measuring ruler of the present invention has a simple structure and is easy to manufacture.

[0053] (2) The measuring ruler of the present invention can measure the posterior inclination angle of the tibial osteotomy plane, which is simple, safe and accurate in measurement.

[0054] (3) The measuring rod of the measuring ruler of the present invention is designed to be slidably connected to the scale ruler, and this connection can ensure that the measuring plate can be completely attached to the tibial osteotomy plane in various situations.

[0055] (4) The pointer of the measuring ruler of the present invention is designed to swing to a specified position and indicate the posterior inclination angle of the tibial osteotomy plane, ensuring accurate measurement of the posterior inclination angles of tibial osteotomy planes of various sizes.

[0056] (5) The scale pointer of the measuring ruler of the present invention is designed to be bent. This design can not only avoid interference between the scale pointer and the patient's natural tissues, but also magnify the swing amplitude of the pointer to make the measurement more accurate.

[0057] (6) The sleeve of the measuring ruler of the present invention is designed to ensure accurate measurement of the posterior inclination angles of tibial osteotomy planes in various situations.

[0058] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A measuring ruler, characterized in that, it includes: a scale (1) provided with a plurality of measuring scales thereon; a pointer (7) which is arranged opposite to the scale (1) so as to be swingable, so that the pointer (7) indicates the corresponding measuring scale on the scale (1); a measuring rod (2) which is used for corresponding cooperation with the tibial osteotomy plane (6), and the measuring rod (2) is connected to the scale (1) or the pointer (7) to drive the scale (1) or the pointer (7) to swing, so as to obtain the posterior inclination angle of the tibial osteotomy plane (6) through the scale (1) and the pointer (7); the scale (1) includes a connected mounting portion (11) and a scale portion (12) provided with the measuring scales, and the measuring rod (2) is slidably inserted through the mounting portion (11) to drive the scale (1) to swing, and a connecting pin (8) is inserted through the pointer (7) and the mounting portion (11) so that the pointer (7) and the scale (1) are arranged opposite to each other and swingably; a sleeve (4), at least part of the pointer (7) is vertically adjustably mounted in the sleeve (4) to adjust the vertical height of the pointer (7).

2. The measuring ruler according to claim 1, characterized in that, the scale (1) is provided with a mounting hole for mounting the measuring rod (2), and the measuring rod (2) is slidably inserted through the mounting hole so that the measuring rod (2) drives the scale (1) to swing.

3. The measuring ruler according to claim 1, characterized in that, a measuring plate (3) is provided on the measuring rod (2), and the measuring rod (2) contacts the tibial osteotomy plane (6) through the measuring plate (3).

4. The measuring ruler according to claim 3, characterized in that, the measuring rod (2) includes a straight rod section (21) and a bent pipe section (22), the straight rod section (21) is slidably connected to the scale (1); one end of the bent pipe section (22) is connected to the straight rod section (21), and the measuring plate (3) is arranged at the other end of the bent pipe section (22).

5. The measuring ruler according to claim 1, characterized in that, the measuring ruler further includes a locking member (5), the locking member (5) is mounted on the sleeve (4), and at least part of the locking member (5) is connected to the pointer (7) to lock the pointer (7) in the sleeve (4).

6. The measuring ruler according to claim 5, characterized in that, the sleeve (4) is provided with a locking and positioning portion (41), the locking and positioning portion (41) is provided with a positioning threaded hole, and the locking member (5) has a screw portion (51) which is matched with the positioning threaded hole; the positioning threaded hole extends along the radial direction of the sleeve (4) so that the end of the screw portion (51) abuts against the pointer (7).

7. The measuring ruler according to claim 1, characterized in that, The pointer (7) has a fixed part (72) and an indicating part (71) for indicating the measuring scale. The indicating part (71) is located above the fixed part (72). The fixed part (72) is inserted into the sleeve (4) to adjust the vertical height of the pointer (7) by adjusting the length of the fixed part (72) inserted into the sleeve (4).

8. The measuring ruler according to claim 7, wherein, both the indicating part (71) and the fixed part (72) are rod-shaped, and the indicating part (71) is arranged parallel to the fixed part (72); the pointer (7) has an avoidance part (73), and the avoidance part (73) is located between the indicating part (71) and the fixed part (72) to connect the indicating part (71) and the fixed part (72).

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