Clamping force testing device for orthodontic slot appliances

Abstract

The utility model provides a kind of clamping force testing device for orthodontic slot appliance, comprising: lower fixture assembly and upper fixture assembly clamping appliance;Lower fixture assembly and upper fixture assembly are slidably installed on support assembly;Appliance two sides are inserted in lower fixture assembly along the sliding direction of lower fixture assembly, and lower fixture assembly extends towards the inside of appliance bending, and lower fixture assembly is inserted in the inside central axis of appliance;Push-pull dynamometer is fixed to support assembly, and push-pull dynamometer measuring end is connected to the end of lower fixture assembly away from upper fixture assembly;Digital differential head is fixed to support assembly;Upper fixture assembly is set to digital differential head measuring end, and upper fixture assembly is inserted in the outside central axis of appliance;Digital differential head has adjustable end, and adjustable end drives the upper fixture assembly of measuring end to approach or away from lower fixture assembly.The present application has the effect of improving the accuracy of measuring long-term clamping force retention rate, enhancing reliability, and accurately controlling clamping position.

Description

Technical Field

[0001] This utility model belongs to the field of clamping force testing technology, specifically, it relates to a clamping force testing device for orthodontic brackets. Background Technology

[0002] Assessing the stability of the clamping force (retention force) of an orthodontic appliance during long-term wear in a simulated oral cavity is crucial for predicting the clinical outcome of the appliance (such as whether it will loosen or require early replacement).

[0003] Patent document CN103860284B discloses a diaphragm-type bracketless orthodontic appliance force testing device, including a frame, a digital display distance measuring force applicator, an upper clamp, a lower clamp, and a force gauge; the digital display distance measuring force applicator is vertically mounted on the frame; the upper clamp is mounted on the lower end of the movable adjustment part of the digital display distance measuring force applicator; the force gauge is mounted on the frame via a mounting bracket; the lower clamp is mounted on the force gauge; the upper clamp includes a horizontally arranged first elliptical cylinder; the lower clamp includes a cylindrical cap threadedly connected to the force measuring rod of the force gauge; a horizontally arranged second elliptical cylinder is fixed to the circumferential side of the upper end of the cylindrical cap; the mounting bracket has two mounting and fixing positions on the frame.

[0004] However, the existing device in patent document CN103860284B has serious defects in measuring the long-term clamping force retention rate, such as the 72-hour continuous decay test. It lacks stable and reliable clamping positioning and precise control of the clamping position, which can easily cause force drift and failure monitoring.

[0005] To address these issues, this invention improves the accuracy of measuring long-term clamping force retention, enhances clamping reliability, and ensures precise control of clamping position. Therefore, this invention designs a clamping force testing device for orthodontic appliances, solving the aforementioned problems. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a clamping force testing device for orthodontic brackets.

[0007] According to the present invention, a clamping force testing device for an orthodontic bracket includes: a support assembly, a lower clamp assembly, an upper clamp assembly, a push-pull force gauge, and a digital display micrometer head;

[0008] The lower clamping assembly, the upper clamping assembly, the digital display differential head, and the push-pull force gauge are respectively mounted on the support assembly;

[0009] The lower clamp assembly and the upper clamp assembly hold the orthodontic appliance;

[0010] The lower clamp assembly and the upper clamp assembly are slidably mounted on the support assembly, and the lower clamp assembly and the upper clamp assembly are close to or far from each other;

[0011] The two sides of the orthodontic appliance are inserted into the lower clamp assembly along the sliding direction of the lower clamp assembly, and the lower clamp assembly extends toward the inside of the bent part of the orthodontic appliance. The lower clamp assembly is inserted into the central axis of the inside of the orthodontic appliance.

[0012] The push-pull force gauge is fixed to the support assembly, and the measuring end of the push-pull force gauge is connected to the end of the lower clamp assembly away from the upper clamp assembly;

[0013] The digital display differential head is fixed to the support assembly;

[0014] The upper clamp assembly is located at the measuring end of the digital display micrometer head, and the upper clamp assembly is inserted into the central axis on the outside of the orthodontic appliance;

[0015] The digital display differential head has an adjustable end, which drives the upper clamp assembly of the measuring end to move closer to or further away from the lower clamp assembly.

[0016] Preferably, the support assembly includes a frame and a pad;

[0017] The frame is constructed of aluminum profiles, consisting of multiple aluminum profiles connected by bolts and nuts;

[0018] The pad is located above the frame and can be provided with multiple mounting holes, which are then bolted to the aluminum profile of the frame.

[0019] The lower clamp assembly, upper clamp assembly, digital display micrometer head, and push-pull force gauge are respectively mounted on the pad.

[0020] Preferably, the lower clamp assembly includes a lower clamp assembly body and a lower clamp head;

[0021] The lower clamp assembly body is supported by the sliding assembly and slides along the horizontal surface of the pad;

[0022] The two sides of the orthodontic appliance abut against the lower clamp assembly body along the sliding direction of the lower clamp assembly body;

[0023] The lower clamp is fixed to the lower clamp assembly body on the side near the upper clamp assembly, and the lower clamp is inserted into the inner central axis of the orthodontic appliance;

[0024] The measuring end of the push-pull force gauge is connected to the side of the lower clamp assembly body opposite to the upper clamp assembly.

[0025] Preferably, the sliding assembly includes a base plate and a limiting groove;

[0026] The limiting groove is formed on the surface of the pad, and a universal bullseye ball is set at the bottom of the limiting groove;

[0027] The base plate is housed in the limiting groove, and its bottom surface abuts against the universal bullseye ball. The fixture assembly body is placed on and slides along the upper surface of the base plate.

[0028] Preferably, at least three universal bullseye balls are provided, and the universal bullseye balls are not collinear.

[0029] Preferably, the lower clamp assembly body is provided on the inner side corresponding to the curvature of the orthodontic appliance, and the lower clamp assembly body is provided with a left support protrusion and a right support protrusion on both sides;

[0030] The left and right support protrusions are symmetrically arranged about the lower clamp.

[0031] The two ends of the orthodontic appliance bend are housed between the left support protrusion and the right support protrusion. The left positioning surface at one end of the orthodontic appliance abuts against the inner wall of the right support protrusion, and the right positioning surface at the other end of the orthodontic appliance abuts against the inner wall of the left support protrusion.

[0032] Preferably, the upper clamp assembly includes an upper chuck;

[0033] The upper clamp is fitted onto the measuring end of the digital display micrometer head;

[0034] The upper clamp is driven by the differential lever to approach the lower clamp and clamp the orthodontic appliance.

[0035] Preferably, a fixing seat is fitted onto the digital display differential head;

[0036] The fixed base securely connects the digital display micrometer head and the pad.

[0037] Preferably, the head of the lower clamp is a conical structure with a length of 10-12mm, and the diameter of the smallest part of the head of the lower clamp is 2.5mm. A corresponding circular groove is provided on the orthodontic appliance for positioning.

[0038] The head of the upper clamp has a conical structure with a length of 10-12mm. The smallest diameter of the head of the upper clamp is 2.5mm. The orthodontic appliance has a corresponding upper positioning groove with a circular groove.

[0039] According to the present invention, an orthodontic appliance is provided, employing the aforementioned clamping force testing device for orthodontic brackets.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] The orthodontic appliance is held in place by setting up lower and upper clamps, and the clamping force is displayed by setting up a push-pull force gauge. The clamping force is controlled by a digital display micrometer head and micrometer rod. The clamping is more stable and reliable by setting up upper and lower positioning grooves. Attached Figure Description

[0042] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0043] Figure 1 This is a schematic diagram of the structure of this utility model.

[0044] Figure 2 This is a schematic diagram of the structure of this utility model.

[0045] Figure 3 This is a top view of the structure of this utility model.

[0046] Figure 4 This is a schematic diagram of the structure of the present invention that holds the orthodontic appliance.

[0047] Figure 5 This is a magnified schematic diagram of the main structure of the orthodontic appliance of this utility model.

[0048] Figure 6 This is a rear-view magnified structural diagram of the orthodontic device of this utility model.

[0049] The diagram shows: 1. Frame; 2. Pad; 3. Lower clamp assembly body; 4. Base plate; 5. Limiting groove; 6. Push-pull force gauge; 7. Digital display micrometer head; 8. Fixing base; 9. Micrometer rod; 10. Upper clamp; 11. Lower clamp; 12. Left support protrusion; 13. Right support protrusion; 14. Orthodontic appliance; 15. Lower positioning groove; 16. Upper positioning groove; 17. Left positioning surface; 18. Right positioning surface. Detailed Implementation

[0050] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0051] like Figures 1-5 As shown, a clamping force testing device for orthodontic brackets includes a support assembly, a lower clamp assembly, an upper clamp assembly, a push-pull force gauge 6, and a digital display micrometer head 7.

[0052] The support components include a frame 1 and a base plate 2.

[0053] The frame 1 is constructed of aluminum profiles and consists of multiple aluminum profiles that can be connected with bolts and nuts, making it easy to use.

[0054] The pad 2 is located above the frame. Multiple mounting holes can be provided on the pad 2, and it can be fixed to the aluminum profile of the frame 1 by bolts.

[0055] The lower clamp assembly and the upper clamp assembly are positioned opposite each other on the pad 2 and cooperate to clamp the orthodontic appliance 14.

[0056] The lower clamp assembly includes a lower clamp assembly body 3 and a lower chuck 11.

[0057] The lower clamp assembly body 3 is supported by the sliding assembly and slides along the horizontal plane of the pad 2.

[0058] The lower chuck 11 is fixed to the lower clamp assembly body 3 on the side closer to the upper clamp assembly.

[0059] The head of the lower clamp 11 has a conical structure and a length of 10-12mm. The diameter of the smallest part of the head of the lower clamp 11 is 2.5mm. The orthodontic appliance 14 has a corresponding lower positioning groove 15 with a circular groove for easy clamping.

[0060] Preferably, the lower clamp assembly body 3 has a left support protrusion 12 and a right support protrusion 13 on both sides for positioning the orthodontic appliance 14. The left support protrusion 12 and the right support protrusion 13 are symmetrically arranged about the lower clamp head 11. According to the curved shape of the orthodontic appliance 14, when clamping, the two ends of the bent head of the orthodontic appliance 14 are accommodated between the left support protrusion 12 and the right support protrusion 13. The left positioning surface 17 at one end of the orthodontic appliance 14 abuts against the inner wall of the right support protrusion 13, and the right positioning surface 18 at the other end of the orthodontic appliance 14 abuts against the inner wall of the left support protrusion 12. The two ends of the orthodontic appliance 14 are positioned by the left support protrusion 12 and the right support protrusion 13.

[0061] The sliding assembly includes a base plate 4 and a limiting groove 5.

[0062] The limiting groove 5 is formed on the surface of the pad 2, and the bottom of the limiting groove 5 is provided with universal bullseye ball bearings.

[0063] The base plate 4 is housed in the limiting groove 5, and its bottom surface abuts against the universal bullseye ball. The fixture assembly body 3 is placed on the 4 and slides along the upper surface of the base plate 4.

[0064] There are at least three universal bullseye ball bearings, and the universal bullseye ball bearings are not collinear, so as to adjust the angle and height of the base plate and align the lower clamping assembly with the lower clamping assembly.

[0065] The measuring end of the push-pull force gauge 6 is connected to the side of the lower clamp assembly body 3 opposite to the upper clamp assembly; the push-pull force gauge 6 is a digital display push-pull force gauge 6, which can display the force applied by the lower clamp assembly body 3 during use, and is an existing device.

[0066] The upper clamp assembly includes an upper chuck 10.

[0067] The digital differential head 7 is used to measure and display the amount of movement, for existing equipment.

[0068] A fixed base 8 is fitted on the digital display differential head 7.

[0069] The fixed base 8 is used to fix the digital display micro head 7 and the pad 2.

[0070] The upper chuck 10 is set on the measuring end of the digital display micrometer head 7.

[0071] The head of the upper clamp 10 is a conical structure with a length of 10-12mm. The diameter of the smallest part of the head of the upper clamp 10 is 2.5mm. The orthodontic appliance 14 has a corresponding upper positioning groove 16 with a circular groove for easy clamping. The lower clamp 11 has the same height as the upper clamp 10, and the lower positioning groove 15 has the same height as the upper positioning groove 16.

[0072] Preferably, the upper positioning groove 16 and the lower positioning groove 15 are aligned with each other, which facilitates the processing of the orthodontic appliance and also facilitates the alignment and installation during clamping.

[0073] The digital display micrometer head 7 is equipped with a micrometer lever 9. By rotating the micrometer lever 9, the upper chuck 10 can be pushed forward or backward. The upper chuck 10 approaches the lower chuck 11 and clamps the orthodontic appliance 14, applying clamping force and pushing the base plate 4 to move. The thrust is displayed by the digital push-pull force gauge 6.

[0074] like Figures 1-5 As shown, the preferred embodiment of this application is that the frame 1 is a cubic frame connected by four horizontal, four vertical, and four longitudinal bolts, with a pad 2 fixed at the top by bolts; a digital display micrometer head 7, a fixed base 8, and a push-pull force gauge 6 are fixedly mounted on the pad 2 from left to right; a single lower clamp assembly body 3 is fixed to the measuring end of the push-pull force gauge 6 and is slidably connected to the pad 2 by a base plate 4; an upper clamp 10 is assisted by the fixed base 8 to be mounted on the measuring end of the digital display micrometer head 7. The lower clamp 11 is fixed to the lower clamp assembly body 3. Both the upper clamp 10 and the lower clamp 11 are conical with their tips facing each other. The orthodontic appliance 14 is placed between the upper clamp 10 and the lower clamp 11. The orthodontic appliance 14 is curved, with the bent end facing the lower clamp assembly body 3 and symmetrically arranged with the upper clamp 10 and the lower clamp 11. The two ends of the bent end of the orthodontic appliance 14 are accommodated and positioned between the left support protrusion 12 and the right support protrusion 13, thereby forming a test structure for the orthodontic appliance 14.

[0075] The working principle of this application is as follows: When the lower clamping assembly 11 moves under force feedback control until the push-pull force gauge 6 detects a preload of 0.1N, the 0.1N preload is the initial preload force. The adjustable digital display micrometer head 7 continues to move the lower clamping assembly by 0.5mm ± 0.02mm. The initial clamping force is recorded at this time. The push-pull force gauge 6 and the lower clamping assembly 11 are completely fixed and maintain a constant compression displacement (fluctuation ≤ ± 0.02mm) for 72 hours. After the end, the continuous clamping force is recorded.

[0076] This application clamps the orthodontic appliance 14 by setting a lower clamping assembly and an upper clamping assembly, displays the clamping force by setting a push-pull force gauge 6, and controls the clamping force in conjunction with a digital display micrometer head 7 and a micrometer rod 9. The clamping is more stable and reliable by setting an upper positioning groove 16 and a lower positioning groove 15.

[0077] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0078] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A device for testing the clamping force of orthodontic brackets, characterized in that, include: Support assembly, lower clamp assembly, upper clamp assembly, push-pull force gauge (6) and digital display differential head (7); The lower clamp assembly, the upper clamp assembly, the digital display micrometer head (7) and the push-pull force gauge (6) are respectively installed on the support assembly; The lower clamp assembly and the upper clamp assembly clamp the orthodontic appliance (14); The lower clamp assembly and the upper clamp assembly are slidably mounted on the support assembly, and the lower clamp assembly and the upper clamp assembly are close to or far from each other; The two sides of the orthodontic appliance (14) are inserted into the lower clamp assembly along the sliding direction of the lower clamp assembly, and the lower clamp assembly extends toward the inside of the bending of the orthodontic appliance (14), and the lower clamp assembly is inserted into the inner central axis of the orthodontic appliance (14). The push-pull force gauge (6) is fixed to the support assembly, and the measuring end of the push-pull force gauge (6) is connected to the end of the lower clamp assembly away from the upper clamp assembly; The digital display differential head (7) is fixed to the support assembly; The upper clamp assembly is set at the measuring end of the digital display micrometer head (7), and the upper clamp assembly is inserted into the outer central axis of the orthodontic appliance (14); The digital display differential head (7) has an adjustable end that drives the upper clamp assembly of the measuring end to move closer to or further away from the lower clamp assembly.

2. The clamping force testing device for orthodontic appliances according to claim 1, characterized in that, The support assembly includes a frame (1) and a pad (2); The frame (1) is constructed of aluminum profiles, including multiple aluminum profiles connected by bolts and nuts; The pad (2) is located above the frame. Multiple mounting holes can be provided on the pad (2) and it can be fixed to the aluminum profile of the frame (1) by bolts. The lower clamp assembly, the upper clamp assembly, the digital display micrometer head (7) and the push-pull force gauge (6) are respectively mounted on the pad plate (2).

3. The clamping force testing device for orthodontic appliances according to claim 2, characterized in that, The lower clamp assembly includes a lower clamp assembly body (3) and a lower clamp head (11); The lower clamp assembly body (3) is supported by the sliding assembly and slides along the horizontal plane of the pad (2); The two sides of the orthodontic appliance (14) slide against the lower clamp assembly body (3) along the sliding direction of the lower clamp assembly body (3); The lower clamp (11) is fixed to the lower clamp assembly body (3) on the side near the upper clamp assembly, and the lower clamp (11) is inserted into the inner central axis of the orthodontic appliance (14); The measuring end of the push-pull force gauge (6) is connected to the side of the lower clamp assembly body (3) opposite to the upper clamp assembly.

4. The clamping force testing device for orthodontic brackets according to claim 3, characterized in that, The sliding assembly includes a base plate (4) and a limiting groove (5); The limiting groove (5) is opened on the surface of the pad (2), and the bottom of the limiting groove (5) is provided with a universal bullseye ball; The base plate (4) is housed in the limiting groove (5), and its bottom surface abuts against the universal bullseye ball. The clamp assembly body (3) is placed on the base plate (4) and slides along the upper surface of the base plate (4).

5. The clamping force testing device for orthodontic brackets according to claim 4, characterized in that, The universal bullseye ball bearings are configured in at least three configurations, and the universal bullseye ball bearings are not collinear.

6. The clamping force testing device for orthodontic brackets according to claim 3, characterized in that, The lower clamp assembly body (3) is provided on the inner side of the bend of the orthodontic appliance (14), and the lower clamp assembly body (3) is provided with a left support protrusion (12) and a right support protrusion (13) on both sides. The left support protrusion (12) and the right support protrusion (13) are symmetrically arranged about the lower clamp (11); The two ends of the elbow of the orthodontic appliance (14) are housed between the left support protrusion (12) and the right support protrusion (13). The left positioning surface (17) at one end of the orthodontic appliance (14) abuts against the inner wall of the right support protrusion (13), and the right positioning surface (18) at the other end of the orthodontic appliance (14) abuts against the inner wall of the left support protrusion (12).

7. The clamping force testing device for orthodontic brackets according to claim 2, characterized in that, The upper clamp assembly includes an upper clamp (10); The upper clamp (10) is fitted onto the measuring end of the digital micrometer head (7); The upper clamp (10) is driven by the differential lever (9) to approach the lower clamp (11) and clamp the orthodontic appliance (14).

8. The clamping force testing device for orthodontic brackets according to claim 7, characterized in that, A fixing seat (8) is fitted onto the digital display micrometer head (7); The mounting base (8) is used to fix the digital display micrometer head (7) and the pad (2).

9. The clamping force testing device for orthodontic brackets according to claim 7, characterized in that, The head of the lower clamp (11) is a conical structure with a length of 10-12mm. The diameter of the smallest part of the head of the lower clamp (11) is 2.5mm. The orthodontic appliance (14) has a corresponding lower positioning groove (15) with a circular groove. The head of the upper clamp (10) is a conical structure with a length of 10-12mm. The diameter of the smallest part of the head of the upper clamp (10) is 2.5mm. The orthodontic appliance (14) has a corresponding upper positioning groove (16) with a circular groove.

10. An orthodontic appliance, characterized in that, The clamping force testing device for orthodontic brackets as described in any one of claims 1-9 is used.

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