Force measuring device

Abstract

The utility model provides a force measuring device. Comprising a seat body including a panel; a dynamometer; the connecting mechanism is used for movably connecting the dynamometer to the panel; the locking mechanism comprises a first locking piece arranged on the panel and a second locking piece arranged on the forcemeter, the locking mechanism has a locking state and an unlocking state, and when a force value measured by the forcemeter reaches a target force value, the locking mechanism is switched from the locking state to the unlocking state; when the locking mechanism is in the locking state, the first locking piece is connected with the second locking piece, and the locking mechanism locks the dynamometer in the force measuring direction of the dynamometer. When the locking mechanism is in an unlocking state, the first locking piece is separated from the second locking piece, and the dynamometer is released in the force measuring direction of the dynamometer; according to the force measuring device, in the testing process, after a target force value is reached, locking of the dynamometer can be automatically triggered and released, and force release is rapidly realized, so that damage to a product to be tested caused by over-measured force can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of force testing, and in particular to a force measuring device that can be applied to the bonding force testing of external adhesive attachments in dental instruments. Background Technology

[0002] Dental instruments, such as shell-type orthodontic appliances, are highly personalized. During treatment, external adhesives of varying shapes and sizes are often attached to achieve precise traction and movement of the teeth. The bonding strength of these external adhesives to the shell-type appliance must be no less than the traction value required in the actual treatment scenario to ensure the appliance functions effectively within the target force range. Therefore, monitoring the bonding strength of the external adhesives for each shell-type appliance is essential during its manufacturing process.

[0003] Currently, the bonding strength of dental instruments or related external attachments is mostly tested manually. This often requires numerous testing tools and manual readings, making the testing process cumbersome and inefficient. Furthermore, manual force application is inconsistent; excessive force can easily damage the external attachments or shell-shaped orthodontic appliances themselves, increasing production and maintenance costs. Utility Model Content

[0004] The purpose of this utility model is to provide a force measuring device that, during the testing process, can automatically trigger the release of the force gauge after reaching the target force value, thereby quickly releasing the force and preventing damage to the product under test due to excessive force measurement.

[0005] To achieve the above-mentioned objectives, this utility model adopts the following technical solution: a force measuring device, comprising:

[0006] The base, including the panel;

[0007] Force gauge;

[0008] A connecting mechanism movably connects the force gauge to the panel;

[0009] The locking mechanism includes a first locking member disposed on the panel and a second locking member disposed on the force gauge. The locking mechanism has a locked state and an unlocked state. When the force value measured by the force gauge reaches the target force value, the locking mechanism switches from the locked state to the unlocked state. When the locking mechanism is in the locked state, the first locking member and the second locking member are engaged, and the locking mechanism locks the force gauge in the force measuring direction. When the locking mechanism is in the unlocked state, the first locking member and the second locking member are separated, and the force gauge is released in the force measuring direction.

[0010] As a further improvement of this utility model, the locking mechanism is located on one side of the force gauge in a direction perpendicular to the force measuring direction.

[0011] As a further improvement of the present invention, the force gauge includes a first end with a pull rod; the first locking member includes a first protrusion and the second locking member includes a second protrusion. When the first locking member and the second locking member are engaged, the first protrusion abuts against the side of the second protrusion facing the first end.

[0012] As a further improvement of the present invention, the first protrusion and the second protrusion have abutting inclined surfaces that cooperate with each other.

[0013] As a further improvement of this utility model, the connecting mechanism includes a guide component that guides the force gauge to move along the force measuring direction.

[0014] As a further improvement of this utility model, the guide component includes:

[0015] A slide rail is provided on the panel, and the slide rail extends along the force measuring direction;

[0016] A slider is slidably connected to the slide rail, and the force gauge is fixed to the slider.

[0017] As a further improvement of the present invention, the guide assembly further includes a stop structure for limiting the movement stroke of the slider.

[0018] As a further improvement of the present invention, the stop structure includes stop plates disposed at opposite ends of the slide rail.

[0019] As a further improvement of this utility model, the connecting mechanism further includes a support plate connected to the slider, wherein the distance between the support plate and the panel is greater than the distance between the end of the stop structure away from the panel and the panel; the force gauge is fixed to the support plate.

[0020] As a further improvement of the present invention, the force gauge includes a first end with a pull rod and a second end opposite to the first end; the connecting mechanism also includes an elastic element connected between the second end and the panel.

[0021] As a further improvement of this utility model, the deformation direction of the elastic element is the force measuring direction of the force gauge.

[0022] As a further improvement of the present invention, the locking mechanism further includes a driving component for driving the first locking member to engage or disengage from the second locking member.

[0023] As a further improvement to this utility model, the force measuring device further includes:

[0024] The control unit, the drive assembly, and the force gauge are communicatively connected to the control unit;

[0025] A data processing unit, which is communicatively connected to the control unit, processes the force value of the force gauge acquired by the control unit.

[0026] A storage unit, which is communicatively connected to the control unit, is used to store the data processed by the data processing unit.

[0027] The display unit is communicatively connected to the control unit to display the data processed by the data processing unit.

[0028] As a further improvement of the present invention, the force gauge includes a first end with a pull rod; the panel is an inclined panel that is tilted downward toward the end corresponding to the first end.

[0029] As a further improvement of this utility model, the angle between the inclined panel and the horizontal plane is 15° to 30°.

[0030] As a further improvement of this utility model, the force gauge includes a pull rod with a pull ring, which is adapted to an external adhesive attachment on a dental instrument.

[0031] The beneficial effects of this utility model are as follows: The force measuring device of this utility model has a locking mechanism on the panel for locking or releasing the force gauge in the force measuring direction. During the force measuring process, the locking mechanism locks the force gauge in the force measuring direction. When the force value measured by the force gauge reaches the target force value, the locking mechanism releases the force gauge in the force measuring direction. That is, during the test, after the target force value is reached, the force measuring device can automatically trigger the release of the locking of the force gauge, quickly realize the release of force, and thus avoid damage to the product under test due to over-measurement. Attached Figure Description

[0032] Figure 1 This is a structural schematic diagram of the force measuring device in a specific embodiment of this utility model;

[0033] Figure 2 yes Figure 1 The exploded diagram. Detailed Implementation

[0034] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. Please refer to the accompanying drawings for further details. Figures 1 to 2The figures shown represent preferred embodiments of the present invention. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent modifications or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the protection scope of the present invention.

[0035] The terms "first," "second," etc., used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Furthermore, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected," "located in," etc., should be interpreted broadly. For example, a connection can be a direct connection or an indirect connection through an intermediate medium; it can be a fixed connection, a movable connection, a detachable connection, or an integral connection; and "located in" can be directly located in or indirectly located in through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Please refer to Figures 1-2 As shown, this utility model provides a force measuring device 100. Below, taking the force measuring device 100 used to test the adhesive force of external attachments on a shell-shaped orthodontic appliance in dental instruments as an example, the structure and testing process of the force measuring device 100 will be specifically described. It is understood that the force measuring device 100 is not limited to testing the adhesive force of external attachments on dental instruments, but can also be used to test other force values, such as the tensile force of a rope.

[0037] The force measuring device 100 includes a base 1, a force gauge 2, a connecting mechanism, and a locking mechanism 3. The base 1 includes a panel 11 that supports other mechanisms. The connecting mechanism movably connects the force gauge 2 to the panel 11 to prevent the force gauge 2 from detaching from the panel 11. The locking mechanism 3 is located between the force gauge 2 and the base 1, and has a locked state and an unlocked state. When the locking mechanism 3 is in the locked state, it locks the force gauge 2 in the force measuring direction, thereby allowing the force value to be tested by pulling the force measuring end of the force gauge 2. When the locking mechanism 3 is in the unlocked state, it releases the force gauge 2 in the force measuring direction, at which point the force gauge 2 is in a free-moving state in the force measuring direction. During the force measurement process of the force gauge 2, when the force value measured by the force gauge 2 reaches the target force value, the locking mechanism 3 switches from the locked state to the unlocked state. That is, when the force value measured by the force gauge 2 reaches the target force value, the locking mechanism 3 quickly and automatically releases the force. This not only enables accurate detection of the adhesive force, but also effectively simplifies the testing process of the adhesive force of external attachments. In addition, it can also avoid excessive pulling of external attachments and prevent damage to external attachments / shell orthodontic appliances due to excessive force measurement.

[0038] In one specific embodiment, the force gauge 2 can be an existing spring force gauge 2. The force gauge 2 includes a pull rod 21 and a pull ring 22 located at the end of the pull rod 21. The force measuring end of the force gauge 2 refers to the end of the force gauge 2 with the pull rod 21. The object to be tested is attached to the pull ring 22, and then the force gauge 2 is kept stationary. Pulling the object to be tested stretches the pull rod 21, thereby measuring the corresponding force value of the object to be tested. When the force gauge 2 is used to test the adhesive force of external attachments on a shell-shaped orthodontic appliance, the shape of the pull ring 22 can be set to adapt to the external attachment to be tested on the dental instrument. By attaching the external attachment to the pull ring 22 and then pulling the shell-shaped orthodontic appliance, the adhesive force of the external attachment can be tested.

[0039] It is known that the direction of the adhesive force of the external adhesive attachment measured can be achieved by adjusting the orientation of the shell-shaped orthodontic appliance.

[0040] By incorporating the pull ring 22, various shapes and sizes of external adhesive attachments can be flexibly adapted, enabling the force measuring device 100 to be widely used in the automated production of invisible orthodontic appliances. Simultaneously, the pull ring 22 allows for quick attachment and force measurement during force testing, preventing excessive damage to external adhesive attachments or orthodontic appliances, thereby further improving the versatility and reliability of the force measuring device 100 in different external adhesive attachment bonding force testing scenarios. However, this is not a limitation.

[0041] In one specific embodiment, the locking mechanism 3 includes a first locking member 31 disposed on the panel 11 and a second locking member 32 disposed on the force gauge 2. When the locking mechanism 3 is in the locked state, the first locking member 31 and the second locking member 32 are engaged to restrict the movement of the force gauge in its force-measuring direction. When the locking mechanism 3 is in the unlocked state, the first locking member 31 and the second locking member 32 are disengaged to release the force gauge 2 in its force-measuring direction.

[0042] In a preferred embodiment, the locking mechanism 3 is located on the side of the force gauge 2 corresponding to the direction perpendicular to the force measuring direction. Therefore, the locking mechanism 3 will not interfere with or collide with the force gauge 2 in the force measuring direction, and will not affect the unlocking and release of the force gauge 2.

[0043] In some optional embodiments, the connecting mechanism includes a guide component 4 that guides the force gauge 2 to move along the force measuring direction. By setting the guide component 4, the force gauge 2 can move smoothly only along the predetermined force measuring direction or in the opposite direction during the force release process / when in the unlocked state. It can also enhance the stability of the engagement between the first locking member 31 and the second locking member 32, reducing the impact of multi-directional shaking on the force measurement. At the same time, under the action of the guide component 4, the alignment of the external adhesive attachment and the pull rod 21 of the force gauge 2 can be ensured, which helps to maintain a consistent force loading direction during the measurement process, thereby reducing operational deviations and further improving the repeatability and reliability of the adhesive force test.

[0044] In one specific embodiment, the guide component 4 includes a slide rail 41 disposed on the panel 11 and a slider 42 slidably connected to the slide rail 41. The slide rail 41 extends along the force measuring direction, and the force gauge 2 is fixed to the slider 42. The force gauge 2 and the slider 42 move synchronously. Through the cooperation of the slide rail 41 and the slider 42, smoother linear motion can be achieved in the force measuring direction or in the opposite direction. Simultaneously, this structure facilitates the installation and maintenance of the force gauge 2, allowing for quick disassembly and assembly via the slider 42 during replacement or repair, further improving the efficiency and accuracy of the force measuring device 100. Of course, this is not a limitation; in other embodiments, the wire assembly can also be configured as a slider-slide groove cooperation structure, or other cooperation structures capable of providing guidance.

[0045] In some optional embodiments, the guide component 4 further includes a stop structure for limiting the travel of the slider 42, so as to prevent excessive displacement of the slider 42 / force gauge 2 during the adhesion test, and avoid damage to the force gauge 2, external adhesive attachments or other components due to overtravel of the slider 42 when releasing force, thereby improving the overall measurement safety and stability; in an automated production environment, the setting of the stop structure can also better ensure the repeatability and consistency of the measurement action, further improving the reliability of the adhesion test of external adhesive attachments.

[0046] In one specific embodiment, the stop structure includes stop plates 43 disposed at opposite ends of the slide rail 41. By providing a stop plate 43 at each end of the slide rail 41, the slider 42 can be effectively prevented from overstepping its designated position when it reciprocates along the force measuring direction or in the opposite direction, further preventing damage to external attachments or the force gauge 2; at the same time, it also facilitates the operator to quickly reset the slider 42 during reciprocating force measurement tests, enhancing the overall safety of the device and the stability of repeated operations.

[0047] In some optional embodiments, the connecting mechanism further includes a support plate 5 connected to the slider 42. The distance between the support plate 5 and the panel 11 is greater than the distance between the end of the stop structure away from the panel 11 and the panel 11. The force gauge 2 is fixed to the support plate 5. That is, the support plate 5 is located above the stop structure, and there is no interference between the support plate 5 and the stop structure. By setting the support plate 5 between the slider 42 and the force gauge 2, and making it higher than the stop structure, on the one hand, the size of the guide component 4 is not affected by the size of the force gauge 2. That is, the guide component 4 can be set to be smaller than the size of the force gauge 2, thereby miniaturizing the force measuring device 100 and facilitating the connection between the force gauge 2 and other structures. At the same time, the support plate 5 can provide a more stable installation reference for the force gauge 2 when external force is applied, further reducing the measurement deviation caused by vibration or impact, and meeting the comprehensive requirements of accurate adhesive force testing and protection of the force measuring device 100.

[0048] The force gauge 2 includes a first end with a pull rod 21 and a second end opposite to the first end. In some optional embodiments, the connecting mechanism includes an elastic element 6 connected between the second end and the panel 11. At the moment the locking mechanism 3 unlocks the force gauge 2 when the force value reaches the target force value, the movement of the force gauge 2 is buffered to avoid impact damage, further protecting the external adhesive attachment and the force gauge 2. Simultaneously, the elastic restoring force generated by the deformation of the elastic element 6 provides a stable reset force during device return and repeated measurements, making the measurement process more controllable and reducing errors, thereby achieving more efficient and safer adhesive force testing.

[0049] Furthermore, the deformation direction of the elastic element 6 is the force measuring direction of the force gauge 2; that is, the extension direction of the elastic element 6 is the same as the force measuring direction of the force gauge 2, and the extension direction of the elastic element 6 is also the movement direction of the force gauge 2. This allows for more effective buffering and return of the force gauge 2 when the force value reaches the target force value, avoiding interference from other forces, and making the force application and release process of the force measuring device 100 more stable, thereby further improving the detection accuracy and reliability of the adhesion force of external adhesives.

[0050] In one specific embodiment, the elastic element 6 is a helical spring, and the opposite ends of the helical spring are respectively fixed to the support plate 5 and the panel 11 by fixing posts 7. Of course, this is not a limitation.

[0051] In some optional embodiments, the first locking member 31 includes a first protrusion 311, and the second locking member 32 includes a second protrusion 321. When the first locking member 31 and the second locking member 32 are engaged, the first protrusion 311 abuts against the side of the second protrusion 321 facing the first end. Through the abutting action between the first protrusion 311 and the second protrusion 321 along the force measuring direction, the force gauge 2 can be firmly positioned along the force measuring direction during the bonding force test of the external adhesive attachment, so that the tensile force on the pull rod 21 is stably transmitted to the inside of the force gauge 2. When the force value has not yet reached the target force value, it can maintain its stable locked state, thereby ensuring the accuracy and precision of the force measuring process.

[0052] Furthermore, the first protrusion 311 and the second protrusion 321 have matching abutting slopes. By setting the abutting slopes, the frictional resistance between the first protrusion 311 and the second protrusion 321 during unlocking can be reduced, making the separation action between the first protrusion 311 and the second protrusion 321 smoother; when locked, the slope contact can also provide reliable fit, effectively improving the stability and reliability of the force measurement process, and avoiding the decrease in the accuracy of the adhesion force test due to protrusion jamming.

[0053] In some optional embodiments, the locking mechanism 3 further includes a driving component 33 that drives the first locking member 31 and the second locking member 32 to engage or disengage. With the driving component 33 in place, when the force value measured by the force gauge 2 reaches the target force value and unlocking is required, the first protrusion 311 and the second protrusion 321 can be easily separated by the driving component 33, thereby releasing the force gauge 2 in the force measuring direction and preventing damage to external attachments or the force gauge 2 due to excessive traction, thus achieving a combination of stability and protection.

[0054] In one specific embodiment, the force measuring device 100 further includes a control unit, and the drive assembly 33 and the force gauge 2 are both communicatively connected to the control unit. Through the cooperation of the control unit and the drive assembly 33, the locking mechanism 3 can automatically switch between locked and unlocked states, making the locking and unlocking of the force gauge 2 faster and more reliable, preventing damage to external attachments or the force gauge 2 due to excessive traction, thereby achieving a combination of stability and protection.

[0055] In one specific embodiment, the driving component 33 is a cylinder fixed to the panel 11. The first locking member 31 is connected to the output end of the cylinder, and the second locking member 32 is connected to the support plate 5. By driving the first locking member 31 linearly with the cylinder, the locking mechanism 3 locks the position of the force gauge 2 when the first locking member 31 approaches the second locking member 32 until the first protrusion 311 and the second protrusion 321 abut against each other. Conversely, by driving the first locking member 31 away from the second locking member 32 until the first protrusion 311 and the second protrusion 321 separate, the locking mechanism 3 unlocks the force gauge 2. By using a cylinder as the driving component 33, its controllable stroke and precise action allow for rapid separation or engagement of the first locking member 31 and the second locking member 32. When the measured force reaches the target force value, the cylinder can act promptly and unlock, causing the force gauge 2 to instantly "release force," thereby reducing potential damage from excessive stretching to external adhesives or the force gauge 2 itself. Of course, this is not the only option. In other embodiments, the drive component 33 may also be configured as other drive structures that drive the first locking member 31 to rotate.

[0056] In some optional embodiments, the panel 11 is a horizontal panel with a certain tilt angle. Specifically, the panel 11 is an inclined panel that tilts downwards towards the end corresponding to the first end of the force gauge 2. Setting the panel 11 as an inclined panel makes the force measuring device 100 more ergonomic, reduces operator fatigue, and improves the efficiency and accuracy of adhesive force testing, thereby achieving better measurement results of the adhesive force of external adhesives while ensuring the needs of automated production.

[0057] In an embodiment where the panel 11 is a horizontal panel with a certain tilt angle, the force measuring direction can be the front-back direction, and the first end is the front end.

[0058] In one specific embodiment, the angle between the inclined panel 11 and the horizontal plane is 15° to 30°. This facilitates force measurement operations for the operator.

[0059] Specifically, the base 1 further includes four support legs 12 for supporting the panel 11 on the support surface. The four support legs 12 are respectively located at the four corners of the panel 11, and the height of the two front support legs 12 is less than the height of the two rear support legs 12, so that the panel 11 is an inclined panel after the base 1 is placed on the horizontal support surface.

[0060] In some optional embodiments, the force measuring device 100 further includes a data processing unit, a storage unit, and a display unit communicatively connected to the control unit. The data processing unit processes the force value obtained by the force gauge 2 from the control unit. The storage unit stores the data processed by the data processing unit. The display unit displays the data processed by the data processing unit. After receiving the force value measured by the force gauge 2, the data processing unit processes the force value data according to a preset algorithm, converting the force value data into a readable and analyzable form, and then stores it in the storage unit. The display unit can display the force value test results to the user in numerical or graphical form. This enables accurate testing and recording of the measured force value, providing a reliable basis for subsequent data analysis and production traceability, and significantly improving the visualization and traceability of bonding force testing in the automated production of dental instruments.

[0061] In one specific embodiment, the force measuring device 100 includes a computer with host computer software, the host computer software having the control unit, data processing unit, and storage unit, and the display unit being the computer's display screen.

[0062] Compared with the prior art, the force measuring device 100 in this utility model, by setting a locking mechanism 3 on the panel 11 for locking or unlocking the force gauge 2, when the force value measured by the force gauge 2 reaches the target force value, the locking mechanism 2 switches from the locked state to the unlocked state, and releases the force gauge 2 in the force measuring direction, thus quickly realizing automatic force release. This not only enables accurate detection of adhesive force, but also effectively simplifies the test operation process of the adhesive force of external attachments. In addition, it can also avoid excessive pulling of external attachments and avoid damage to external attachments / shell orthodontic appliances due to excessive force measurement.

[0063] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0064] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A force measuring device; characterized by, The application relates to a force measuring device, comprising: a base body comprising a panel; a force gauge; a connecting mechanism movably connecting the force gauge to the panel; a locking mechanism comprising a first locking member arranged on the panel and a second locking member arranged on the force gauge, the locking mechanism having a locked state and an unlocked state, the locking mechanism being switched from the locked state to the unlocked state when the force value measured by the force gauge reaches a target force value; when the locking mechanism is in the locked state, the first locking member is engaged with the second locking member, and the locking mechanism locks the force gauge in the force measuring direction of the force gauge; when the locking mechanism is in the unlocked state, the first locking member is disengaged from the second locking member, and the force gauge is released in the force measuring direction of the force gauge.

2. The force measuring device of claim 1, wherein: The locking mechanism is arranged on the side of the force gauge in a direction perpendicular to the force measuring direction.

3. The force measuring device of claim 1, wherein: The force gauge comprises a first end with a pull rod; the first locking member comprises a first protrusion, and the second locking member comprises a second protrusion, the first protrusion being abutted against the second protrusion on the side of the first end when the first locking member is engaged with the second locking member.

4. The force measuring device of claim 3, wherein: The first protrusion and the second protrusion have matching abutment slopes.

5. The force measuring device of claim 1, wherein, The connecting mechanism comprises a guide assembly guiding the movement of the force gauge in the force measuring direction.

6. The force measuring device of claim 5, wherein, The guide assembly comprises: a slide rail arranged on the panel and extending in the force measuring direction; a slide block slidably connected to the slide rail and fixed with the force gauge.

7. The force measuring device of claim 6, wherein, The guide assembly further comprises a stop structure limiting the movement stroke of the slide block.

8. The force measuring device of claim 7, wherein, The stop structure comprises stop plates arranged on opposite ends of the slide rail.

9. The force measuring device of claim 7, wherein, The connecting mechanism further comprises a support plate connected to the slide block, the distance between the support plate and the panel being greater than the distance between the end of the stop structure far away from the panel and the panel; and the force gauge is fixed to the support plate.

10. The force measuring device of claim 1 wherein, The force gauge comprises a first end with a pull rod and a second end opposite to the first end; the connecting mechanism further comprises an elastic member connected between the second end and the panel.

11. The force measuring device of claim 10, wherein, The deformation direction of the elastic member is the force measuring direction of the force gauge.

12. The force measuring device of claim 1 wherein, The locking mechanism further comprises a driving assembly driving the first locking member to engage with or disengage from the second locking member.

13. The force measuring device of claim 12, wherein, The force measuring device further comprises: a control unit, the driving assembly and the force gauge being communicatively connected to the control unit; a data processing unit communicatively connected to the control unit to process the force value of the force gauge acquired by the control unit; a storage unit communicatively connected to the control unit to store the data processed by the data processing unit; a display unit communicatively connected to the control unit to display the data processed by the data processing unit.

14. The force measuring device of claim 1 wherein, The force gauge comprises a first end with a pull rod; and the panel is an inclined panel with an end corresponding to the first end being inclined downward.

15. The force measuring device of claim 14, wherein, The included angle between the inclined panel and the horizontal plane is 15-30 degrees.

16. Force measuring apparatus according to any one of claims 1 to 15, wherein The force gauge comprises a pull rod with a pull ring, and the pull ring is matched with an external adhesive accessory on the dental instrument.

Images