A two-point discrimination measurement tool
By designing a two-point discrimination measurement tool that combines a stepped base plate with a sliding protrusion, the problems of high cost, unintuitive measurement, and large error of existing tools are solved. This achieves low-cost, intuitive, and accurate two-point discrimination measurement, making it suitable for use in primary healthcare institutions.
Patent Information
- Application Number
- CN202521243112.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-17
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-06-17
AI Technical Summary
Existing two-point discrimination measurement tools are costly, not intuitive, and prone to errors, making them difficult to popularize in primary healthcare institutions.
The design incorporates a stepped first and second substrate. The sliding between the substrates is achieved through the cooperation of a first protrusion and a second groove, and a second protrusion and a first groove. This ensures the correct direction of the measuring probe movement, eliminates errors, and reduces frictional resistance by applying force through inclined surfaces and notches. Combined with a detachable measuring probe and a pressure sensing chip, this design improves measurement accuracy and comfort.
It enables low-cost, intuitive two-point discrimination measurement, reduces measurement errors, improves the reliability of the measurement tool and the ease of operation for users, and meets the measurement needs of clinical and scientific research.
Smart Images
Figure CN224925143U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of medical device technology, and in particular to a two-point discrimination measurement tool. Background Technology
[0002] Two-point discrimination is an important indicator for assessing human skin sensory function and is widely used in the diagnosis of nerve injury, postoperative recovery monitoring, and evaluation of rehabilitation treatment effects.
[0003] In existing technologies, two-point discrimination measurement tools include chuck-type, caliper-type, and electronic types. Electronic types are difficult to popularize in primary healthcare institutions due to their high cost; chuck-type instruments are less expensive, and are divided into fixed-distance discs or adjustable-distance discs. Both types have radially arranged measuring needles, requiring the disc to be rotated to select different measurement ranges, thus preventing continuous measurement; caliper-type measurements are not intuitive enough. Utility Model Content
[0004] This application provides a two-point discrimination measurement tool that achieves intuitive readings.
[0005] The two-point discrimination measurement tool provided in this application adopts the following technical solution: The first substrate is defined along its length as a first boss portion and a first platform portion. The first boss portion and the first platform portion form a stepped shape. The first boss portion is provided with a first protrusion. The first platform portion is provided with a first groove and a scale extending along the length direction of the first groove. The first substrate is also connected to a first measuring needle on the side of the first boss portion. The second substrate is defined along its length as a second boss portion and a second platform portion, the second boss portion and the second platform portion forming a stepped shape. The second boss portion is provided with a second protrusion, and the second platform portion is provided with a second groove. The second substrate is also connected to a second measuring needle on the side of the second boss portion. The second substrate and the first substrate are mated so that the first protrusion can slide along the second groove and the second protrusion can slide along the first groove. The first measuring needle and the second measuring needle are located on the same side and the plane containing their central axes is parallel to the plane containing the first platform portion. The farthest distance between the centers of the first measuring needle and the second measuring needle is equal to the range of the scale. The sliding distance of the second substrate relative to the first substrate is the real-time distance between the centers of the first measuring needle and the second measuring needle and is the reading of the scale exposed by the second substrate.
[0006] By adopting the above technical solution, the first substrate and the second substrate are slidably aligned, enabling single-handed measurement of two-point discrimination. The first protrusion engages with the second groove, and the second protrusion engages with the first groove, ensuring that the first and second measuring needles move only along the length of the first and second grooves during their movement, avoiding the oscillation error of traditional single-axis calipers. The sliding distance of the second substrate relative to the first substrate directly corresponds to the real-time distance between the centers of the first and second measuring needles, eliminating conversion errors during measurement. The first and second measuring needles are located on the same side, and the plane containing their central axes is parallel to the plane containing the first platform, ensuring that the stimulation direction is perpendicular to the skin surface during two-point discrimination measurement, reducing measurement errors caused by angular deviations.
[0007] Optionally, the first protrusion and the second protrusion have the same structure, and the end of the first protrusion away from the first boss is provided with a buckle, and the second slide groove is provided with a slide that cooperates with the buckle; or the first protrusion and the second protrusion have the same structure, and the first protrusion is provided with a screw hole in the middle, the second slide groove is provided with a slide that is clearance-fitted with the first protrusion, the screw hole is fitted with a screw, and the end of the screw abuts against the surface of the slide.
[0008] By adopting the above technical solution, the first substrate and the second substrate are interlocked. The inverted engagement with the slide or the screw engagement with the screw hole constrains the movement trajectory of the first bump and the second bump, preventing the first substrate and the second substrate from falling off, thereby ensuring the reliability of the two-point discrimination measurement tool. The first bump and the second bump have the same structure, reducing manufacturing complexity and cost.
[0009] Optionally, the first substrate has inclined surfaces on both sides along its length, and the second substrate has inclined surfaces on both sides along its length.
[0010] By adopting the above technical solution, the inclined surface increases the contact area with the user's hand, conforms to the curvature of the hand, helps the user to apply appropriate force to push the first substrate relative to the second substrate to slide, and reduces the fatigue caused by the user's long-term operation; the inclined surface eliminates the sharp edges of the first substrate and the second substrate, thereby preventing the user from being scratched.
[0011] Optionally, a notch is provided on one side of the first substrate, the notch being close to the side of the large range of the scale.
[0012] By adopting the above technical solution, the notch indicates the direction of the force applied by the user, avoiding pushing the first substrate and the second substrate in the wrong direction; the notch can serve as a point of force application for the user's hand, assisting in adjusting the direction of force application to quickly adjust the measurement spacing.
[0013] Optionally, the length of the first groove is equal to the range of the scale.
[0014] By adopting the above technical solution, the scale of the ruler reflects the relative sliding distance between the first substrate and the second substrate, thereby reflecting the real-time distance between the centers of the first measuring needle and the second measuring needle; the length of the first groove limits the relative sliding distance between the first substrate and the second substrate and keeps it within the measuring range of the ruler.
[0015] Optionally, the measuring range of the scale is 2-25mm.
[0016] By adopting the above technical solution, the scale range covers the detection threshold of two-point discrimination in various parts of the human body, thereby enabling the two-point discrimination measurement tool to meet the measurement requirements of clinical and scientific research for two-point discrimination.
[0017] Optionally, the first substrate includes a protective sheet covering the first groove, and the second substrate includes a protective sheet covering the second groove; the surfaces of the first substrate and the second substrate may be covered with rubber or silicone material.
[0018] By adopting the above technical solution, the protective sheet prevents external impurities from entering the first and second slides, ensuring the normal use of the two-point discrimination measurement tool; the surfaces of the first and second substrates can be covered with rubber or silicone material, which conforms to human skin and improves user comfort.
[0019] Optionally, the first substrate has an insertion hole, and the first measuring probe is detachably inserted and connected to the first substrate; the second substrate has an insertion hole, and the second measuring probe is detachably inserted and connected to the second substrate; or The first substrate has an insertion hole, in which a first pressure sensing chip is disposed. The first measuring needle is detachably connected to the first substrate. The second substrate has an insertion hole, in which a second pressure sensing chip is disposed. The second measuring needle is detachably connected to the second substrate. The first and second measuring needles have the same diameter, 1 mm, and the diameter of the measuring end is 0.5 mm; the measuring end is conical with a taper of 60°.
[0020] By adopting the above technical solution, the first and second measuring needles are easy to remove and replace from the first and second substrates, and the first and second measuring needles are easy to disinfect and replace individually to meet the needs of multiple measurement scenarios; the first and second pressure sensing chips realize the sensing and feedback of the force applied by the two-point discrimination measurement tool during the detection process, so that the user can adjust the intensity of the applied force, thereby avoiding measurement errors caused by pressure deviation; the size and shape of the first and second measuring needles are specified to meet the size requirements of two-point discrimination measurement of human skin and ensure the concentration of skin stimulation points, while avoiding the measuring ends being too sharp to puncture the skin.
[0021] Optionally, the surface of the first boss portion may also be provided with multiple rows of raised ridges or multiple rows of raised dots.
[0022] By adopting the above technical solution, the protrusions or bumps reduce the contact area between the first substrate and the second substrate, thereby reducing frictional resistance and adjusting the relative distance between the first substrate and the second substrate.
[0023] Optionally, the surface of the first substrate facing away from the scale is also formed with anti-slip grooves.
[0024] By adopting the above technical solution, the friction between the two-point discrimination measurement tool and the user's hand is enhanced, thereby improving the stability of the grip and the accuracy of operation.
[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The sliding distance of the second substrate relative to the first substrate is the real-time distance between the centers of the first and second measuring needles and is the reading of the scale exposed on the second substrate, which makes it easy for the user to read the current measurement value of the two-point discrimination measurement tool. 2. The first substrate and the second substrate have a large range of forces that can be applied. The bevel and notch help the user apply appropriate force to push the first substrate to slide relative to the second substrate, thereby making it easier for the user to control the force applied to the first substrate and the second substrate. 3. The first pressure sensing chip and the second pressure sensing chip sense and provide feedback on the force applied to the two-point discrimination measurement tool during the detection process, so that the user can adjust the intensity of the applied force. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the structure of a two-point discrimination measurement tool as described in the first embodiment of this application; Figure 2 yes Figure 1 Sectional view of AA; Figure 3 This is a schematic diagram of the first substrate structure in the first embodiment of this application; Figure 4 This is a schematic diagram of another perspective of the two-point discrimination measurement tool described in the first embodiment of this application; Figure 5 This is a front view of a two-point discrimination measurement tool as described in the second embodiment of this application; Figure 6 yes Figure 5 Sectional view of BB; Figure 7 This is a front view of a two-point discrimination measurement tool as described in the third embodiment of this application; Figure 8 yes Figure 7 Sectional view of CC; Figure 9 This is a schematic diagram of the first substrate structure in the fourth embodiment of this application.
[0027] Explanation of reference numerals in the attached figures: 1. First substrate; 11. First boss; 111. First bump; 1111. Undercut; 1112. Screw hole; 1113. Screw; 112. First measuring probe; 113. Raised edge; 114. Raised point; 12. First platform; 121. First groove; 122. Scale; 13. First pressure sensing chip; 14. Anti-slip groove; 2. Second substrate; 21. Second boss; 211. Second bump; 212. Second measuring probe; 22. Second platform; 221. Second groove; 2211. Slide; 23. Second pressure sensing chip; 3. Bevel; 4. Notch; 5. Protective plate; 6. Insertion hole. Detailed Implementation
[0028] The present application will be further described in detail below with reference to all the accompanying drawings.
[0029] This application discloses a two-point discrimination measurement tool.
[0030] Example 1 Please see Figure 1-4The first embodiment of this application provides a two-point discrimination measurement tool, which includes a first substrate 1 and a second substrate 2, wherein the second substrate 2 is disposed opposite to the first substrate 1, such that the first protrusion 111 can slide along the second slide groove 221 and the second protrusion 211 can slide along the first slide groove 121, thereby facilitating the adjustment of the distance between the first measuring needle 112 and the second measuring needle 212. The first measuring needle 112 and the second measuring needle 212 are located on the same side, and the plane containing their central axes is parallel to the plane containing the first platform portion 12. The farthest distance between the centers of the first measuring needle 112 and the second measuring needle 212 is equal to the range of the scale 122. The sliding distance of the second substrate 2 relative to the first substrate 1 is the real-time distance between the centers of the first measuring needle 112 and the second measuring needle 212 and is the reading of the scale 122 exposed on the second substrate 2. This avoids the problems of inaccurate spacing and poor repeatability caused by human judgment, so as to achieve continuous and accurate adjustment of the measurement spacing. At the same time, the reading of the side of the first substrate 1 coinciding with the scale 122 is the current measurement spacing, so the current measurement spacing can be read intuitively.
[0031] Specifically, the first substrate 1 is defined along its length as a first boss portion 11 and a first platform portion 12. The first boss portion 11 and the first platform portion 12 form a stepped shape. The first boss portion 11 is provided with a first protrusion 111. An undercut 1111 is provided at the end of the first protrusion 111 away from the first boss portion 11, so that the first protrusion 111 is formed into an L-shape. The undercut 1111 can be triangular or trapezoidal, etc., and the material can be the same as the first protrusion 111. The second slide groove 221 can be a stepped groove or a rectangular groove, etc. The second slide groove 221 can be clearance-fitted to the end face of the first protrusion 111 near the first protrusion 11 to ensure that the first protrusion 111 can slide smoothly along the second slide groove 221. The second slide groove 221 is provided with a slide channel 2211 that cooperates with the inverted buckle 1111. The shape of the slide channel 2211 is adapted to the inverted buckle 1111. The inverted buckle 1111 abuts against the side of the slide channel 2211 and interlocks the first substrate 1 and the second substrate 2, thereby preventing the first protrusion 111 from disengaging from the second slide groove 221 during the sliding process, and ensuring the stability and reliability of a two-point discrimination measurement tool.
[0032] The first substrate 1 has inclined surfaces 3 on both sides along its length, which facilitates the user to apply force on the inclined surfaces 3 and push the first substrate 1 to slide more smoothly along the second slide groove 221. At the same time, the second substrate 2 also has inclined surfaces 3 on both sides along its length, so the user does not need to distinguish the direction of the applied force, further improving the convenience of a two-point discrimination measurement tool. A notch 4 is provided on one side of the first substrate 1, which is close to the side of the large range of the scale 122. The notch 4 can be semi-circular or rectangular, etc., and the notch 4 indicates the value of the current measurement range at the reading position of the scale 122, so that the user can easily read the value of the current measurement range.
[0033] The first platform portion 12 is provided with a first slide groove 121 and a scale 122 extending along the length of the first slide groove 121. The scale 122 can be a scale etched on the surface of the first platform portion 12 or a scale strip embedded in the surface of the first platform portion 12, with an accuracy at the millimeter level and a measurement range of 2mm-25mm, thereby meeting the measurement range requirements of two-point discrimination. The length of the first slide groove 121 is equal to the range of the scale 122, thereby ensuring that the distance the second substrate 2 slides relative to the first substrate 1 accurately corresponds to the reading of the scale 122, improving the accuracy of the measurement.
[0034] The first substrate 1 has an insertion hole 6, and the first measuring needle 112 is detachably inserted into the first substrate 1. The first measuring needle 112 can be a metal needle.
[0035] The surface of the first boss portion 11 is also provided with multiple rows of protruding ridges 113 or protrusions 114. The protruding ridges 113 or protrusions 114 reduce the contact area between the first substrate 1 and the second substrate 2, thereby reducing frictional resistance and facilitating the adjustment of the relative distance between the two.
[0036] The surface of the first substrate 1 facing away from the scale 122 is also provided with anti-slip grooves 14. The anti-slip grooves 14 can be strip grooves or grid grooves, etc., thereby increasing the friction between the user's hand and the first substrate 1, making the operation of a two-point discrimination measurement tool more stable.
[0037] The first substrate 1 also includes a protective sheet 5 covering the first slide groove 121. The protective sheet 5 can be a transparent plastic sheet, which is fixed to the first platform portion 12 by means of adhesive or snap-fit. The protective sheet 5 prevents dust, debris, etc. from entering the first slide groove 121 and affecting the sliding of the first protrusion 111. Similarly, the second substrate 2 includes a protective sheet 5 covering the second slide groove 221, which serves the same protective function.
[0038] The second substrate 2 is defined along its length as a second boss portion 21 and a second platform portion 22, which form a stepped shape. The second boss portion 21 is provided with a second protrusion 211, the shape and material of which are similar to those of the first protrusion 111. The second platform portion 22 is provided with a second groove 221, the structure of which is similar to that of the first groove 121, for sliding in conjunction with the first protrusion 111.
[0039] The second substrate 2 has an insertion hole 6, and the second measuring needle 212 is detachably inserted into the second substrate 2. The first measuring needle 112 and the second measuring needle 212 have the same diameter, 1 mm, and the diameter of the measuring end is 0.5 mm. The measuring end is tapered with a taper of 60°, so that the first measuring needle 112 and the second measuring needle 212 meet the size requirements for two-point discrimination measurement of human skin, while avoiding the measuring end being too sharp to puncture the skin.
[0040] The first substrate 1 and the second substrate 2 can be made of plastic or metal, such as epoxy resin, iron, etc. The surfaces of the first substrate 1 and the second substrate 2 can be covered with rubber or silicone. Rubber and silicone have a certain degree of elasticity and flexibility, which not only makes it convenient for users to hold and operate, but also reduces the pressure of the measuring tool on the human body and improves the user's comfort.
[0041] The implementation principle of the two-point discrimination measurement tool in this application embodiment is as follows: Before measurement, the first substrate 1 is slid relative to the second substrate 2 to minimize the measurement gap, and the parallelism of the first measuring needle 112 and the second measuring needle 212 is observed and adjusted; then the measurement gap is adjusted to the required measurement value, and the first measuring needle 112 and the second measuring needle 212 are brought into contact with the user's skin surface. The current measurement gap is read by observing the reading of the side of the first substrate 1 coinciding with the scale 122; finally, the first substrate 1 is slid relative to the second substrate 2, the measurement gap is continuously adjusted, and multiple measurements are performed.
[0042] Example 2 Please see Figure 5-6 , Figure 5-6The second embodiment of this application provides a two-point discrimination measurement tool, which is basically the same as the first embodiment. The difference is that in this embodiment, a first pressure sensing chip 13 is disposed in the insertion hole 6 of the first substrate 1, and a second pressure sensing chip 23 is disposed in the insertion hole 6 of the second substrate 2. A display panel can be disposed on the surface of the first substrate 1 away from the scale 122. The first pressure sensing chip 13 and the second pressure sensing chip 23 are connected to the display panel. When the user measures two-point discrimination, the first pressure sensing chip 13 and the second pressure sensing chip 23 sense the pressure values of the first measuring needle 112 and the second measuring needle 212 and feed them back to the display panel so that the user can measure two-point discrimination multiple times with the same pressure, thereby ensuring measurement accuracy.
[0043] The implementation principle of the two-point discrimination measurement tool in this application embodiment is as follows: when the first measuring needle 112 and the second measuring device come into contact with the user's skin, they undergo slight deformation in the direction away from the skin due to the reaction force of the skin, and apply force to the first pressure sensing chip 13 and the second pressure sensing chip 23 respectively. The first pressure sensing chip 13 and the second pressure sensing chip 23 sense the pressure intensity and feed it back to the display panel. The user can read the current applied force intensity by observing the display panel and adjust the applied force intensity to be relatively consistent for each measurement, so as to reduce the situation where the intensity of skin stimulation is different due to different applied forces during measurement, thereby affecting the measurement result of two-point discrimination.
[0044] Example 3 Please see Figure 7-8 , Figure 7-8 The third embodiment of this application provides a two-point discrimination measurement tool, which is basically the same as the first embodiment. The difference is that in this embodiment, the first protrusion 111 and the second protrusion 211 have the same structure. The first protrusion 111 is provided with a screw hole 1112 in the middle. The second slide groove 221 is provided with a slide 2211 that is clearance-fitted with the first protrusion 111. The screw hole 1112 is fitted with a screw 1113, and the end of the screw 1113 abuts against the surface of the slide 2211.
[0045] The implementation principle of the two-point discrimination measurement tool in this application embodiment is as follows: the first protrusion 111 is fitted with the slide 2211 with a clearance, so that the first substrate 1 can slide relative to the second substrate 2 along the length direction of the slide 2211. The screw 1113 is fitted with the screw hole 1112, and the end of the screw 1113 abuts against the surface of the slide 2211, thereby preventing the first substrate 1 from separating and falling off from the second substrate 2, and locking the first substrate 1 and the second substrate 2.
[0046] Example 4 Please see Figure 9 , Figure 9 The second embodiment of this application provides a two-point discrimination measurement tool, which is basically the same as the first embodiment, except that in this embodiment, the surface of the first protrusion 11 is provided with multiple rows of protrusions 114.
[0047] The implementation principle of the two-point discrimination measurement tool in this application embodiment is that the multi-row protrusions 114 further reduce the contact area between the first substrate 1 and the second substrate 2, reduce frictional resistance, and thus make it easier to adjust the relative distance between the first substrate 1 and the second substrate 2.
[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A two-point discrimination measurement tool, characterized in that, include: A first substrate (1) is defined along its length as a first boss portion (11) and a first platform portion (12). The first boss portion (11) and the first platform portion (12) are formed in a stepped shape. The first boss portion (11) is provided with a first protrusion (111). The first platform portion (12) is provided with a first groove (121) and a scale (122) extending along the length direction of the first groove (121). A first measuring needle (112) is also connected to the side of the first boss portion (11) of the first substrate (1). The second substrate (2) is defined along its length as a second boss portion (21) and a second platform portion (22). The second boss portion (21) and the second platform portion (22) are stepped. The second boss portion (21) is provided with a second protrusion (211), and the second platform portion (22) is provided with a second groove (221). A second measuring needle (212) is also connected to the side of the second boss portion (21) of the second substrate (2). The second substrate (2) is mated with the first substrate (1) so that the first protrusion (111) can slide along the second groove (221). The second protrusion (211) can slide along the first groove (121), and the first measuring needle (112) and the second measuring needle (212) are located on the same side and the plane containing their central axes is parallel to the plane containing the first platform portion (12). The farthest distance between the centers of the first measuring needle (112) and the second measuring needle (212) is equal to the range of the scale (122). The sliding distance of the second substrate (2) relative to the first substrate (1) is the real-time distance between the centers of the first measuring needle (112) and the second measuring needle (212) and is the reading of the scale (122) exposed by the second substrate (2).
2. The two-point discrimination measurement tool according to claim 1, characterized in that: The first protrusion (111) and the second protrusion (211) have the same structure, and the end of the first protrusion (111) away from the first boss portion (11) is provided with a buckle (1111), and the second slide groove (221) is provided with a slide (2211) that cooperates with the buckle (1111); or The first protrusion (111) and the second protrusion (211) have the same structure. The first protrusion (111) has a screw hole (1112) in the middle. The second slide groove (221) has a slide (2211) that is clearance-fitted with the first protrusion (111). The screw hole (1112) is fitted with a screw (1113), and the end of the screw (1113) abuts against the surface of the slide (2211).
3. The two-point discrimination measurement tool according to claim 1, characterized in that: The first substrate (1) has inclined surfaces (3) on both sides of its length direction, and the second substrate (2) has inclined surfaces (3) on both sides of its length direction.
4. A two-point discrimination measurement tool according to claim 1, characterized in that: A notch (4) is provided on one side of the first substrate (1), and the notch (4) is close to the side of the large range of the scale (122).
5. A two-point discrimination measurement tool according to claim 1, characterized in that: The length of the first groove (121) is equal to the range of the scale (122).
6. A two-point discrimination measurement tool according to claim 5, characterized in that: The measuring range of the scale (122) is 2-25mm.
7. A two-point discrimination measurement tool according to claim 1, characterized in that: The first substrate (1) includes a protective sheet (5) covering the first groove (121), and the second substrate (2) includes a protective sheet (5) covering the second groove (221); the surfaces of the first substrate (1) and the second substrate (2) may be covered with rubber or silicone material.
8. A two-point discrimination measurement tool according to claim 1, characterized in that: The first substrate (1) has an insertion hole (6), and the first measuring needle (112) is detachably inserted into the first substrate (1). The second substrate (2) has an insertion hole (6), and the second measuring needle (212) is detachably inserted into the second substrate (2); or The first substrate (1) has an insertion hole (6), in which a first pressure sensing chip (13) is disposed. The first measuring needle (112) is detachably inserted into the first substrate (1). The second substrate (2) has an insertion hole (6), in which a second pressure sensing chip (23) is disposed. The second measuring needle (212) is detachably inserted into the second substrate (2). The first measuring needle (112) and the second measuring needle (212) have the same diameter, which is 1 mm, and the diameter of the measuring end is 0.5 mm; the measuring end is conical with a taper of 60°.
9. A two-point discrimination measurement tool according to claim 5, characterized in that: The surface of the first boss portion (11) is also provided with multiple rows of protruding ridges (113); or The surface of the first boss portion (11) is also provided with multiple rows of protrusions (114).
10. A two-point discrimination measurement tool according to claim 5, characterized in that: The surface of the first substrate (1) facing away from the scale (122) is also formed with anti-slip grooves (14).