JP6384810B2 - Tibial displacement measuring instrument - Google Patents

Description

  The present invention relates to a tibial movement amount measuring device used when measuring a movement amount of a subject's tibia forward and the like.

  Ligament injury is widely known as a disease mainly caused by trauma or external pressure caused by exercise or accident. For example, if the anterior cruciate ligament that connects the femur and tibia is damaged, the amount of forward movement of the tibia increases compared to when there is no damage. In some cases, a diagnosis may be made by measuring the amount of forward movement of the tibia. Patent Documents 1 and 2 disclose a test device for knee ligaments.

US Pat. No. 4,583,554 US Pat. No. 4,583,555

In the device described in Patent Document 1, it is necessary not only to fix the device to the front portion of the patella and the front portion of the tibia but also to apply the device to the calf. Further, the device described in Patent Document 2 needs to be fixed to a portion corresponding to the vicinity of the distal portion of the tibia in addition to the front portion of the patella and the front portion of the tibia. As described above, the conventional tibial movement measuring device cannot be easily measured because it takes time to attach the tibial to the leg.
In addition, the conventional tibial displacement measuring device has a problem that it is difficult to carry because the metal parts are heavy and heavy.

  Therefore, the main object of the present invention is to provide a tibial displacement measuring device that is easy to measure.

That is, the present invention includes a knee-side component disposed on the patella portion of the measurement subject, a tibia-side component that is slidably connected to the knee-side component and disposed on the tibia portion of the measurement subject, There is provided a tibial movement amount measuring device comprising: a display unit that indicates a relative displacement amount between the knee side part and the shin side part during sliding. The knee side part and the shin side part may be detachable.
The display unit may include a first display unit and / or a second display unit. The first display unit and / or the second display unit may include a magnifying lens. The first display part and / or the second display part include a gear, and the knee side part and the shin side part are rotated by the rotation of the gear when the knee side part and the shin side part slide. It is good also as a structure which shows the relative displacement amount.
The knee side component may include a knee pad. The knee pad may be provided so that the position relative to the knee-side component can be adjusted. The knee pad may be made of metal. The knee side component and / or the shin side component may include a fixing member to the lower limb of the measurement subject.

  In the present disclosure, “front” means the front direction of the body, and “rear” means the back direction of the body. Further, “side” means a left-right direction with respect to the front-rear direction.

  According to the present invention, it is possible to provide a tibial displacement measuring device that is easy to measure and easy to carry.

It is a perspective view which shows the tibial movement amount measuring device 1 which concerns on one Embodiment of this invention. It is a perspective view which shows the state which decomposed | disassembled the tibial movement amount measuring device 1 which concerns on one Embodiment of this invention. FIG. 3 is a plan view showing a part of a knee side component 2 and a shin side component 3 shown in FIG. 2. It is a top view which shows the 2nd display part shown in FIG. It is a rear view which shows the 2nd display part shown in FIG. It is a perspective view which shows the fixing member mounting example of the tibial movement amount measuring device 1 shown in FIG. It is a figure for demonstrating the usage example of the tibial movement amount measuring device 1 shown in FIG.

  Hereinafter, modes for carrying out the present invention will be described. In addition, embodiment described below shows an example of embodiment of this invention, and, thereby, the range of this invention is not interpreted narrowly.

  The tibial displacement measuring device of the embodiment according to the present invention includes a knee-side component disposed in a portion corresponding to the subject's patella (patellar portion) and a portion corresponding to the subject's tibia (tibia portion). The shin side part arrange | positioned and a display part are provided. The shin side component is slidably connected to the knee side component. The display unit is configured to indicate a relative displacement amount between the knee-side component and the shin-side component during sliding.

The tibial movement measuring device of this embodiment can measure the movement amount of the tibia according to the movement of the subject's tibia in the forward, backward and lateral directions. When the tibial displacement measuring instrument is applied to the part corresponding to the front of the patella (front part of the patella) and the part corresponding to the front of the tibia (front part of the tibia), the amount of movement of the tibia forward and backward It is possible to measure. When the tibial displacement measuring device is applied to the part corresponding to the side of the patella (the side part of the patella) and the part corresponding to the side of the tibia (the side part of the tibia), the amount of lateral movement of the tibia is measured. Is possible.
As described above, the tibial movement amount measuring device according to the present embodiment can measure the movement amount of the tibia in the forward, backward, and lateral directions without changing the form. Hereinafter, in order to simplify the description, the configuration of the tibial movement amount measuring device according to the present embodiment will be described with reference to the drawings, taking as an example the case of measuring the amount of movement of the tibia anterior and posterior.

<Configuration example>
FIG. 1 is a perspective view showing a tibial displacement measuring device 1 according to the present embodiment, and arrows A, B and C in FIG. 1 indicate the front, back and side of the tibia, respectively. As shown in FIG. 1, the tibial displacement measuring instrument 1 of this embodiment includes a knee-side component 2 and a tibia-side component 3. FIG. 1 shows a state in which the knee side component 2 and the shin side component 3 are slidably connected in the directions of arrows A and B.
When the tibial movement measuring instrument 1 is used, the knee-side component 2 and the shin-side component 3 are slidable according to the movement of the subject's tibia. The relative displacement amount of the knee-side component 2 and the shin-side component 3 during the sliding represents the amount of tibia movement of the measurement subject. Furthermore, the tibial movement amount measuring instrument 1 of the present embodiment includes a display unit 4 that displays the relative displacement amount of the knee-side component 2 and the shin-side component 3 during sliding.

(Knee side part 2, shin side part 3)
The knee-side component 2 is a component applied to the front portion of the subject's patella during use, and the shin-side component 3 is a component applied to the front portion of the subject's tibia during use. The tibial component 3 is preferably applied to a site corresponding to the front surface of the proximal portion of the tibia of the subject (the front surface portion of the proximal portion of the tibia) in use.

  The shapes of the knee-side component 2 and the shin-side component 3 are not particularly limited, but the sliding direction of the knee-side component 2 and the shin-side component 3 depends on the knee contact of the knee-side component 2 in order to measure the amount of tibial movement more accurately. It is preferable that the side surface 2a and the shin contact surface 3a of the shin side component 3 are substantially vertical. Examples of the shape of the knee-side component 2 and the shin-side component 3 include a cube shape, a rectangular parallelepiped shape, a triangular prism shape, a columnar shape, an H shape, and an L shape. Of these shapes, the L-shape is preferable because it can be stably applied to the patella or tibia during use, and can be reduced in size and weight and is suitable for carrying. As shown in FIG. 1, in the tibial displacement measuring device 1 of the present embodiment, the knee side component 2 includes a knee side base portion 21 that contacts the front surface portion of the patella and a knee side connection portion 22 that contacts the tibia side component 3. It has a letter shape. Further, in the shin side component 3, the shin side base portion 31 in contact with the front surface portion of the tibia and the shin side connection portion 32 in contact with the knee side component 2 are L-shaped.

The connection method of the knee side component 2 and the shin side component 3 is not particularly limited as long as it is slidably connected. For example, by slidably combining the knee-side component 2 and the shin-side component 3 with the component disposed between the knee-side component 2 and the shin-side component 3, the knee-side component 2 and the shin-side component 3 are slidably connected. can do. Further, a sliding groove 23 is provided in the knee side connection portion 22 along the sliding direction, and a sliding portion 33 is provided in the shin side connection portion 32 along the sliding direction so that the sliding groove 23 and the sliding portion 33 slide. The knee part 2 and the shin part 3 can be slidably connected via movement.
FIG. 2 is a perspective view showing a state in which the tibial displacement measuring device according to the present embodiment is disassembled. As shown in FIG. 2, the sliding groove 23 preferably extends from one end of the knee-side connecting portion 22 to the other end along the sliding direction. Moreover, it is preferable that the sliding part 33 is extended from the one end of the shin side connection part 32 to the other end along the sliding direction.

  FIG. 3 is a plan view showing a part of the knee-side component 2 and the shin-side component 3 shown in FIG. The shape of the sliding groove 23 provided in the knee-side connecting portion 22 of the knee-side component 2 is not particularly limited, but the width D1 of the opening portion 231 of the sliding groove 23 is the width D2 of the sliding groove 23 on the groove body side. A narrower shape is preferable. Also, the shape of the sliding portion 33 is not particularly limited, but the sliding portion 33 includes the convex portion 331, the width D3 of the convex portion 331 is wider than the width D1 of the opening portion 231, and the sliding groove. 23 is preferably narrower than the width D2 on the groove body side. By forming the sliding groove 23 and the sliding portion 33 in such a shape, it is possible to prevent the convex portion 331 from being detached from the opening portion 231.

  Further, in order to accurately measure the amount of tibial movement, it is preferable that the knee-side component 2 and the tibial component 3 slide smoothly in response to slight movement of the tibia. The friction of 23 is preferably small. Therefore, it is preferable that the convex height dimension D4 of the convex part 331 is smaller than the depth dimension D5 of the sliding groove 23 on the groove main body side. By setting it as such a structure, the friction of the convex part 331 and the sliding groove 23 can be reduced, and the slide of the knee side component 2 and the shin side component 3 can be made smoother.

  Moreover, it is preferable that the knee side component 2 and the shin side component 3 are detachably connected. As described above, the knee-side component 2 and the tibia-side component 3 are configured to be detachable, so that the tibial displacement measuring instrument 1 can be disassembled except when in use, and placed in a pocket such as a lab coat worn by a doctor to be used. Since it can be downsized to such an extent that it can be carried, it becomes easier to carry.

  The method for attaching and detaching the knee-side component 2 and the shin-side component 3 is not particularly limited. For example, the knee-side component 2 or the hole is formed in a hole formed by drilling a component disposed between the knee-side component 2 and the shin-side component 3. The shin side component 3 may be connected by fitting or screwing. Further, it is possible to adopt a configuration in which one end or both ends of the sliding groove 23 are extended to one end or both ends of the knee-side connecting portion 22 and one end or both ends of the sliding groove 23 have the attachment / detachment port 232. In the sliding groove 23 shown in FIG. 2, both ends of the sliding groove 23 extend to both ends of the knee side connection portion 22, and attachment / detachment ports 232 and 232 are provided at both ends of the sliding groove 23. By sliding the sliding portion 33 to the end in the upper direction (see arrow A in FIG. 1) or the lower direction (see arrow B in FIG. 1) of the sliding groove 23, the knee 33 is removed from the attachment / detachment port 232. The side part 2 and the shin side part 3 can be separated. Further, the knee-side component 2 and the shin-side component 3 can be connected by inserting the sliding portion 33 into the sliding groove 23 from the attachment / detachment opening 232 above or below the sliding groove 23.

Moreover, as shown in FIG. 1 or FIG. 2, the knee side base part 21 can be provided with the groove part 25 in the upper surface 2b on the opposite side to the knee contact side surface 2a. The shape of the groove portion 25 is not particularly limited. For example, one end of the groove portion 25 extends to the end of the knee side base portion 21 and the opening portion 251 is provided at the end of the knee side base portion 21. In this case, it is preferable that the width of the opening portion of the groove 25, the width on the groove main body side, and the depth dimension on the groove main body side are the same width or dimensions as the sliding groove 23. With such a configuration, after the knee-side component 2 and the shin-side component 3 are separated, the sliding portion 33 is inserted into the groove portion 25 from the opening 251 to connect the knee-side component 2 and the shin-side component 3. The tibial movement amount measuring device 1 can be made more compact and suitable for carrying by combining in piles.
In this case, it is preferable that the shape of the knee side component 2 and the shin side component 3 is L-shaped. Since the knee side base portion 21 and the shin side connection portion 32 are overlapped and the knee side connection portion 22 and the shin side base portion 31 are overlapped, that is, two L-shaped members are overlapped. It can be made compact and suitable for carrying.

  The material of the knee-side component 2 and the tibia-side component 3 is not particularly limited, but in order to accurately measure the amount of tibia movement, the knee-side component 2 and the tibia-side component 3 are smoothly moved in response to slight movement of the tibia. It is preferable to slide. Therefore, for example, the sliding parts such as the sliding part 33 and the sliding groove 23 are preferably made of a material having a low coefficient of friction, such as metal, and the other parts are made easy to carry. It is preferable to form with a lightweight resin.

(Display unit 4)
The display unit 4 displays a relative displacement amount between the knee-side component 2 and the tibia-side component 3 when the tibial displacement measuring device 1 is slid, and the relative displacement amount represents the tibia displacement amount of the measurement subject. . Although the structure of the display part 4 is not specifically limited, For example, the structure provided with the 1st display part 41 and / or the 2nd display part 42 is employable. The first display unit 41 and / or the second display unit 42 may include a magnifying lens. This magnifying lens makes it easy to visually recognize the amount of relative displacement when the knee side component 2 and the shin side component 3 slide. The first display unit 41 and / or the second display unit 42 include gears, and the knee side component 2 and the shin are rotated by the rotation of the gear when the knee side component 2 and the shin side component 3 slide. It can also be set as the structure which shows the relative displacement amount at the time of a slide with the side component 3. FIG.

(First display unit 41)
The first display unit 41 is slid from the direction of the arrow C shown in FIG. 1, that is, from the side of the tibia when the tibial displacement measuring device 1 is used, when the knee side component 2 and the tibia component 3 are slid. It is provided so that the relative displacement amount can be visually recognized. The first display unit 41 is not particularly limited as long as it can display the relative displacement amount when the knee side component 2 and the shin side component 3 are slid. For example, the first display unit 41 displays the analog type by a scale or the like. The display may be digitally displayed on a display panel or the like, but the analog type is preferable from the viewpoint of simplifying parts, improving durability, and reducing costs.

  The 1st display part 41 shown in FIG. 1 has shown one Embodiment in the case of displaying the relative displacement amount at the time of the slide of the knee side component 2 and the shin side component 3 with a scale. As shown in FIG. 1, the first display unit 41 can include a scale unit 411 and a measurement line 412. The scale portion 411 is provided on the knee side connection portion 22 along the sliding direction, and the measurement line 412 is provided on the shin side connection portion 32. When the tibial movement amount measuring instrument 1 is used, the movement amount of the measurement line 412 is read against the scale portion 411, and the relative displacement when the knee side component 2 and the shin side component 3 are slid is measured. Measure the amount of movement. Since it is desirable that the amount of tibial movement can be measured in millimeters, the minimum unit of the scale portion 411 is preferably about 1 mm.

In order to make it easy to read the scale, a scale width 413 may be displayed on the scale portion 411. Since the knee-side component 2 and the shin-side component 3 slide in the directions of arrows A and B in FIG. 1 when in use, the scale width 413 has an arrow A with zero near the center of the scale portion 411 as shown in FIG. And it is preferable to display so that a numerical value becomes large toward each direction of arrow B. By doing in this way, it becomes easy to read the scale even if the knee side component 2 and the shin side component 3 slide in either the direction of the arrow A or the arrow B.
In FIG. 1, the scale portion 411 is provided on the knee-side component 2 and the measurement line 412 is provided on the shin-side component 3, but conversely, the scale portion 411 is provided on the shin-side component 3 and the measurement line 412 is provided on the knee side. The component 2 may be provided.

  Although not shown, the first display unit 41 may include a magnifying lens that magnifies and displays at least one of the scale part 411, the measurement line 412, and the scale width 413. Thereby, the scale at the time of measurement can be easily read. When the first display unit 41 includes a magnifying lens, the magnifying lens can be the same as the magnifying lens included in the second display unit 42 described later.

  Although not shown in the drawing, the first display unit 41 includes a gear that rotates when the knee side component 2 and the shin side component 3 slide, and the knee side component 2 and the shin side component are rotated by the rotation of the gear. 3 may be configured to indicate a relative displacement amount when sliding with the third position.

(Second display unit 42)
The second display unit 42 is moved from the direction of the arrow A shown in FIG. 1, that is, from the front side of the tibia when the tibial displacement measuring device 1 is used, when the knee side component 2 and the tibia side component 3 are slid. It is provided so that the relative displacement can be visually recognized. The display method of the second display unit 42 is not particularly limited as long as it can display the relative displacement when the knee side component 2 and the shin side component 3 are slid. Although it may be displayed digitally on a display panel or the like, an analog type is preferable from the viewpoint of simplifying parts, improving durability, and reducing costs.

  The 2nd display part 42 shown in FIG. 1 has shown one Embodiment in the case of displaying the relative displacement amount at the time of the slide of the knee side component 2 and the shin side component 3 with a scale. The second display unit 42 houses a display member 421 with a scale line and a scale value, a gear 422 for rotating the display member 421, a rack 423 that meshes with the gear 422, and the rack 423. A rack groove 424 is provided. The display member 421 and the gear 422 are provided on the shin side connection portion 32. The rack 423 is provided on the connection surface of the knee side connection portion 22 with the shin side connection portion 32 and extends from one end of the knee side connection portion 22 to the other end along the sliding direction. The rack groove 424 is provided on the connection surface of the shin side connection portion 32 with the knee side connection portion 22 and extends from one end of the shin side connection portion 32 to the other end along the sliding direction. The rack groove 424 is provided at a position corresponding to the rack 423 when the knee side component 2 and the shin side component 3 are connected. Further, the rack groove 424 has a notch portion to be described later, and the rack 423 is accommodated in the rack groove 424 when the knee side component 2 and the shin side component 3 are connected, and the gear 422 and the rack 423 are engaged with each other at the notch portion. To do.

  When the tibial displacement measuring instrument 1 is used, when the sliding groove 23 and the sliding portion 33 slide, the gear 422 that meshes with the rack 423 rotates, and the display member 421 also rotates according to the rotation of the gear 422. The scale line moves by rotating. The relative displacement when the knee-side component 2 and the shin-side component 3 are slid can be measured by the amount of movement of the scale line.

  The second display unit 42 is moved from the direction of the arrow A shown in FIG. The present invention is not limited to the above configuration as long as the relative displacement amount can be displayed. For example, the display member 421, the gear 422, and the rack groove 424 may be provided on the knee side connection portion 22, and the rack 423 may be provided on the connection surface of the shin side connection portion 32 with the knee side connection portion 22.

  Although the shape of the display member 421 is not particularly limited, the outer surface such as a cylindrical shape or a columnar shape is preferably a circumferential shape. When the outer surface of the display member 421 has a circumferential shape, it is preferable to attach a scale line and a scale value along the circumferential direction of the outer surface.

4A is a plan view showing the second display section 42 shown in FIG. As illustrated in FIG. 4A, the display member 421 is provided with a scale line 4211 and a scale value 4212. 4B is a rear view showing the second display section 42 shown in FIG. As shown in FIG. 4B, the second display portion 42 includes a notch 425 at a position corresponding to the accommodation portion of the gear 422 at the bottom surface portion of the rack groove 424. When the knee side component 2 and the shin side component 3 are connected, the gear 422 and the rack 423 are engaged with each other at the notch 425.
Note that the scale unit 4211 preferably has a minimum unit of about 1 mm as described above (first display unit 41).

  The configuration of the second display unit 42 is not limited to the above as long as the relative displacement between the knee-side component 2 and the shin-side component 3 can be displayed. For example, the display member 421 is rotated by a magnetic force. A movable structure or the like may be employed.

  Further, the second display unit 42 can include a reference value adjusting unit 426 and a reference line 427. For example, the reference value adjustment unit 426 is configured to be able to rotate the display member 421 by its operation, and before the measurement is started, the reference value adjustment unit 426 is operated to rotate the display member 421 to obtain a scale value. The zero of 4212 and the reference line 427 can be matched. At the time of measurement, the scale can be easily read by reading the scale of the display member 421 using the reference line 427 as an index.

  The second display unit 42 preferably includes a magnifying lens 428 that magnifies and displays the scale line 4211 and the scale value 4212 of the display member 421. Thereby, while adopting a simple configuration, it is possible to improve the visibility and easily read the scale at the time of measurement.

The shape of the magnifying lens 428 can be appropriately selected as long as the effect is not impaired. For example, as shown in FIG. 1, a magnifying lens 428 may be provided so as to cover the side where the display member 421 is visually recognized, that is, the front side of the display member 421. In the case where the display member 421 has a cylindrical outer shape such as a cylindrical shape or a cylindrical shape, the magnifying lens 428 may be a lens having a curved surface along the outer surface of the display member 421. In this case, the magnifying lens 428 can be a convex meniscus lens in which one surface is convex and the other surface is concave, and the center portion of the lens is thicker than the peripheral portion of the lens.
Further, as the shape of the magnifying lens 428, a shape that covers the entire outer surface of the display member 421 may be adopted. For example, when the display member 421 has a shape whose outer surface is circumferential, the magnifying lens 428 is cylindrical, the inner diameter of the magnifying lens 428 is larger than the outer diameter of the display member 421, and the inner side of the magnifying lens 428 is set. The display member 421 may be arranged.

(Knee pad 5)
The tibial displacement measuring device 1 may be provided with a knee pad 5 on the knee side component 2 as shown in FIG. 1 in order to stably apply the knee side component 2 to the front surface of the patella. The knee pad 5 is preferably provided so that the position relative to the knee-side component 2 can be adjusted in order to arrange the knee pad 5 at a position suitable for measurement according to the size of the patella of the person to be measured, the length of the leg, and the like. The knee pad 5 is preferably detachably connected to the knee part 2. By adopting such a detachable configuration, the knee pad 5 can be removed from the knee-side component 2 when not in use, and the tibial movement amount measuring instrument 1 can be further reduced in size to be suitable for carrying.

  The configuration of the knee pad 5 is not particularly limited. For example, the knee pad 5 may be integrally molded with the knee side component 2 or may be combined after being molded separately from the knee side component 2, but as described above, the position adjustment is performed. Since it is preferable that it can be attached or detached, a configuration in which the knee-side component 2 is separately molded and then combined is preferable. The method for combining the knee side part 2 and the knee pad 5 is not particularly limited. For example, the knee pad 5 is provided with a fitting part, a threaded part, etc., and fitted into a hole formed by drilling in the knee side base 21. It is good also as a structure combined by joining or screwing.

  The knee pad 5 shown in FIG. 1 includes a mounting bar 51 and is detachably combined by fitting the mounting bar 51 and a mounting hole 24 provided in the knee contact side surface 2a. In this case, two or more attachment holes 24 are preferably provided so that the position of the knee pad 5 can be adjusted. The configuration of the knee pad 5 is not limited to the above. For example, the knee pad 5 is provided with a sliding component, and the knee base 21 is provided with a groove in which the sliding component slides. 5 may be configured to slide, and a magnet is attached to the knee pad 5 and the knee base 21, or a magnet is attached to the knee base 21 and the knee pad 5 is made of metal. It is good also as composition to do.

  The material of the knee pad 5 is not particularly limited, but the heavier pad 5 is a metal that is used to give weight to the knee pad 5 because the heavier one will stably adhere to the front surface of the subject's patella by its own weight. It is preferable that it is manufactured. In addition, in order to stably bring the knee pad 5 into close contact with the front surface portion of the patella of the measurement subject, the knee contact surface 5a of the knee pad 5 is provided with an adhesive material or a material having a large frictional force against the skin. It may be.

(Fixing member 6)
FIG. 5 is a perspective view showing an example of mounting the fixing member of the tibial displacement measuring device 1 shown in FIG. In order to fix the tibial movement measuring instrument 1 to the lower limb of the measurement subject at the time of measuring the tibial movement, the tibial movement measuring instrument 1 may include a fixing member 6 on the knee side component 2 and / or the tibia component 3. . The fixing member 6 is not particularly limited, and examples thereof include belts, medical tapes, and band-shaped articles such as bandages. However, belts are preferable because they are easy to carry, fix, and reusable. A belt having stretchability and a hook-and-loop fastener is more preferable.
A method for fixing the tibial movement amount measuring device 1 by the fixing member 6 is not particularly limited, but it is preferable that the tibial movement amount measuring device 1 and the lower limb of the measurement subject are wound and fixed by the fixing member 6.

(Mounting part 7)
As shown in FIG. 1, the tibial movement amount measuring instrument 1 may include an attachment portion 7 for attaching the fixing member 6 to the knee-side component 2 and / or the shin-side component 3. By fixing the tibial movement amount measuring device 1 and the lower limb of the measurement subject using the fixing member 6 mounted on the mounting portion 7, the fixing member 6 and the knee side component 2 and / or the shin are measured at the time of measuring the tibial movement amount. It is possible to prevent the side component 3 from being displaced and to maintain the fixed state stably. The tibial movement measuring instrument 1 shown in FIG. 1 includes a mounting portion 7 on a knee-side base 21, and the mounting portion 7 is provided on an upper surface 2b opposite to the knee contact side surface 2a.
At the time of measuring the amount of tibial movement, the fixing member 6 mounted on the mounting portion 7 is wound around the knee joint of the measurement subject and fixed so that the knee side component 2 does not deviate from the front surface portion of the patella as shown in FIG. It is preferable to do.

  Moreover, in order to adjust the position of the fixing member 6 to a position suitable for fixing the knee-side component 2 and / or the shin-side component 3, the mounting portion 7 is preferably provided so that the mounting position can be adjusted. Moreover, the attachment part 7 may be detachably connected, and by attaching the attachment part 7 in this manner, the attachment part 7 is detached from the knee side part 2 or the shin side part 3 and then attached. Since the fixing member 6 can be attached to the portion 7, it is not necessary to attach the fixing member 6 while holding the entire tibial movement measuring instrument 1, and the fixing member 6 can be attached more easily.

  The mounting method of the fixing member 6 to the mounting portion 7 is not particularly limited. For example, a mounting hole 71 may be provided as shown in FIG. 1 or 2 and the fixing member 6 may be passed through the mounting hole 71. The configuration of the mounting portion 7 is not particularly limited. For example, the mounting portion 7 may be integrally formed with the knee side component 2 or the shin side component 3, or may be combined after being molded separately from the knee side component 2 or the shin side component 3. As described above, since it is preferable that position adjustment and attachment / detachment are possible, a configuration in which the knee side component 2 or the shin side component 3 is separately molded and then combined is preferable.

For example, as shown in FIG. 1 or 2, the knee-side component 2 and the mounting portion 7 are configured by a groove portion 25 provided on the upper surface 2 b opposite to the knee contact side surface 2 a and a protrusion provided on the mounting portion 7. It is possible to adopt a configuration in which 72 is slidably combined. By sliding the protrusion 72 with respect to the groove 25, the position of the mounting portion 7 can be adjusted as appropriate.
Further, one end of the groove 25 may include an opening 251 that extends to the end of the knee-side base 21 and opens at the end of the knee-side base 21. With such a configuration, the mounting portion 7 can be slid toward the opening 251 and removed from the groove 25, and the protrusion 72 can be inserted and attached from the opening 251.

  Further, as described in the above (knee side component 2 and shin side component 3), the width of the opening of the groove 25, the width of the groove main body, and the depth of the groove main body are the same as those of the sliding groove 23, respectively. It is preferable that the width or size be about the same. With such a configuration, for example, after the mounting portion 7 to which the fixing member 6 is mounted is removed from the groove portion 25 and the knee side component 2 and the shin side component 3 are separated, the sliding portion 33 is removed from the opening portion 251 to the groove portion 25. The knee side part 2 and the shin side part 3 can be overlapped and combined. In this way, the knee-side component 2 and the shin-side component 3 are overlapped to form a compact shape, so that the tibial movement amount measuring device 1 can be made to be more portable.

  The configuration of the mounting portion 7 is not limited to the above. For example, the mounting portion 7 is provided with a fitting component, a screwing component, or the like, and is fitted or screwed into a hole formed by drilling in the knee side base 21. It is good also as a structure connected by doing. Moreover, it is good also as a structure joined by magnetic force, such as attaching a magnet to the mounting part 7 and the knee side base 21, or attaching a magnet to the knee side base 21, and making the mounting part 7 metal. In addition, although the structure in the case of combining the shin side part 3 and the mounting part 7 is not particularly limited, for example, the same structure as that of the knee side part 2 and the mounting part 7 described above can be adopted. .

<Operation example>
Next, the operation of the tibial displacement measuring device 1 according to this embodiment will be described. FIG. 6 is a perspective view showing an example of use of the tibial displacement measuring device 1 shown in FIG. When measuring the amount of forward movement of the tibia using the tibial movement amount measuring instrument 1 according to the present embodiment, first, the knee of the person 8 to be measured who is lying on his back is bent back and forth by 20 °, and the knee pad The pad 5 is applied to the front surface portion 81 of the patella, and the tibial base portion 31 is applied to the front surface portion 82 of the proximal portion of the tibia. The measurer 9 grasps and presses the femur portion 83 of the measured person 8 from the outside by hand, and the tibial base 31 applied to the calf of the measured person 8 and the front portion 82 of the proximal part of the tibia is placed on the leg. Grab it with your hand from the inside and pull the tibia forward. When the tibia is pulled forward in this manner, the knee-side component 2 and the tibia-side component 3 slide in response to the movement of the tibia, so that the relative displacement amount of the knee-side component 2 and the tibia-side component 3 at the time of sliding is displayed. By confirming with 4, it is possible to measure the amount of forward movement of the tibia. When measuring the amount of backward movement of the tibia, it can be measured by pushing the tibia backward instead of pulling the tibia forward by the above method.

  When the tibial displacement measuring instrument 1 is used for diagnosing the anterior cruciate ligament injury, the above-mentioned movement of measuring the forward displacement of the tibia is performed on the left and right legs of the subject, and the healthy and injured leg tibias are measured. Damage to the anterior cruciate ligament can be diagnosed by comparing the amount of forward movement. Although there are differences depending on the person to be measured, for example, when the difference in the forward movement of the tibia between a healthy leg and an injured leg is small, specifically when the difference is less than 1 cm, the degree of damage to the anterior cruciate ligament It can be diagnosed that the small or anterior cruciate ligament is not damaged. When the difference in the forward movement amount of the tibia between the healthy leg and the injured leg is large, specifically, when the difference is 1 cm or more, it can be diagnosed that the degree of damage to the anterior cruciate ligament is large.

  Although not shown in the figure, when measuring the amount of movement of the tibia inward, the knee pad 5 is applied to the inner part of the knee joint, the tibia base 31 is applied to the inner surface of the tibia, and the tibia is moved inward. Measure by moving to. When measuring the amount of movement of the tibia outward, the knee pad 5 is applied to the outer portion of the knee joint, the tibia base 31 is applied to the outer surface of the tibia, and the tibia is moved outward. To do.

  According to the tibial movement amount measuring instrument 1 of the present embodiment described in detail above, it is not necessary to fix the device to the leg as in the conventional tibial movement amount measuring device, so that the tibial movement amount can be easily measured. it can. Moreover, since it is small and lightweight compared with the conventional measuring apparatus, it can carry around easily. The tibial displacement measuring instrument 1 of the present embodiment can be suitably used for diagnosis of anterior cruciate ligament damage.

DESCRIPTION OF SYMBOLS 1 Tibial displacement measuring device 2 Knee side part 2a Knee contact side surface 2b Upper surface on the opposite side of knee contact side surface 2a 21 Knee side base part 22 Knee side connection part 23 Sliding groove 231 Opening part 232 Detachment opening 24 Mounting hole 25 Groove part 251 Opening Part 3 shin side part 3a shin contact surface 31 shin side base part 32 shin side connection part 33 sliding part 331 convex part 4 display part 41 first display part 411 scale part 412 measurement line 413 scale width 42 second display part 421 Display member 4211 Scale line 4212 Scale value 422 Gear 423 Rack 424 Rack groove 425 Notch 426 Reference value adjustment part 427 Reference line 428 Magnifying lens 5 Knee pad 5a Knee contact surface 51 Mounting rod 6 Fixing member 7 Mounting part 71 Mounting hole 72 Projection 8 Measured person 9 Measured person

Claims (7)

Knee components placed on the patella of the subject;
A tibia component that is slidably connected to the knee component and disposed on the tibia of the measurement subject;
A first display section and / or a second display section showing a relative displacement amount between the knee side part and the shin side part during sliding;
Equipped with a,
The first display unit and / or the second display unit includes a display member with a scale line and a scale value, and a gear for rotating the display member, and the knee-side component and the A tibial movement amount measuring device , wherein the display member rotates in accordance with the rotation of the gear when sliding with the shin side component, the scale line moves, and the relative displacement amount is indicated by the movement amount of the scale line .   The tibial displacement measuring device according to claim 1, wherein the knee-side component and the shin-side component are detachable. The tibial displacement measuring device according to claim 1 or 2, wherein the first display unit and / or the second display unit includes a magnifying lens. The tibial displacement measuring device according to any one of claims 1 to 3 , wherein the knee side component includes a knee pad. The tibial displacement measuring device according to claim 4 , wherein the knee pad is provided so that its position relative to the knee-side component can be adjusted. The tibial displacement measuring device according to claim 4 or 5 , wherein the knee pad is made of metal. The tibial displacement measuring device according to any one of claims 1 to 6 , wherein the knee side component and / or the shin side component includes a fixing member to a lower limb of a measurement subject.

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