Scanning mechanism having protection system

Abstract

The present disclosure describes a scanning mechanism having a protection system. The scanning mechanism comprises a detection element for scanning an object to be measured; a protection system comprises a base, a moving part, a sensing device, and an elastic reset device; the detection element is disposed on the moving part; the moving part is movably connected to the base by means of the elastic reset device; the sensing device generates a sensing signal when sensing that the moving part undergoes displacement relative to the base and the displacement amount exceeds a preset threshold; on the basis of the sensing signal, the scanning mechanism stops scanning. Thus, a scanning mechanism having a protection system can be provided, and the protection system can protect the scanning mechanism.

Description

Scanning mechanism with protection system Technical Field

[0001] The present disclosure generally relates to the field of intelligent manufacturing, and more particularly to a scanning mechanism with a protection system. Background Art

[0002] As the level of industrial development continues to improve, the demand for high-precision measurement of complex shapes and tiny sizes of products is increasing day by day. Traditional manual measurement methods can no longer meet people's pursuit of high-precision measurement.

[0003] A profilometer (also known as a profilometer) is an industrial measuring instrument used to perform high-precision measurements of the surface profile (such as roughness or shape) of a workpiece. Based on their working principles, profilometers can be divided into contact profilometers and optical 3D surface profilometers. The contact profilometer uses a scanning mechanism to move a stylus against the surface of the workpiece, scanning the surface of the workpiece. This acquires the two-dimensional coordinates of the workpiece's surface profile, and then uses a software system to analyze and process the coordinate data to draw the surface profile of the workpiece.

[0004] For contact profilometers, although the scanning mechanism has a strong climbing ability when driving the stylus to scan the workpiece to be measured, in some extreme cases, for example, some workpieces to be measured may have obvious pits or burrs on the surface due to processing reasons. During the process of the stylus scanning the workpiece to be measured, the stylus may be stuck in the pits or burrs (for example, the stylus is caught in the pit). At this time, if the scanning mechanism is not stopped in time, it may be damaged.

[0005] Summary of the Invention

[0006] The present disclosure is proposed in view of the above situation, and an object of the present disclosure is to provide a scanning mechanism with a protection system, wherein the protection system can protect the scanning mechanism.

[0007] To this end, the present disclosure provides a scanning mechanism with a protection system, wherein the scanning mechanism includes a detection element for scanning an object to be measured, and the protection system includes a base, a moving part, a sensing device, and an elastic reset device. The detection element is arranged on the moving part, and the moving part is movably connected to the base through the elastic reset device. The sensing device senses that the moving part is displaced relative to the base and the displacement exceeds a preset threshold to generate a sensing signal, and the scanning mechanism is stopped scanning based on the sensing signal.

[0008] In the present disclosure, a detection element is mounted on the moving portion. During the scanning process, the moving portion and the detection element move synchronously. Because the moving portion and the base are flexibly connected, changes in the motion state of the detection element cause changes in the motion state of the moving portion, thereby causing the moving portion to move relative to the base. Furthermore, a sensing device monitors the displacement of the moving portion relative to the base. When the displacement exceeds a preset threshold, the sensing device emits a sensing signal, which, based on the sensing signal, promptly stops the scanning mechanism, protecting it from damage.

[0009] In addition, in the scanning mechanism involved in the present disclosure, optionally, the detection element scans the object to be detected by abutting the object to be detected, and the elastic reset device includes a first elastic element, a second elastic element, a connecting rod movably arranged between the base and the moving part, and a first fastener and a second fastener fixedly arranged on the connecting rod, the moving part is configured to cooperate with the first fastener and the first elastic element and the base is configured to cooperate with the second fastener and the second elastic element to achieve: when the first elastic force applied by the first elastic element to the moving part or the second elastic force applied by the second elastic element to the base is greater than the friction force encountered by the detection element when scanning the object to be detected, the moving part and the base remain relatively stationary; when the first elastic force or the second elastic force is less than the friction force, the moving part is displaced relative to the base; when the first elastic force or the second elastic force is less than the impact force encountered by the detection element, the moving part is displaced relative to the base. In this case, by maintaining the moving portion and the base relatively stationary while the scanning mechanism drives the detection element to scan the object under test, the possibility of the moving portion sliding relative to the base due to inertia can be suppressed. This reduces the likelihood of the moving portion shifting relative to the base due to inertia. This ensures greater stability for the scanning mechanism, thereby improving the accuracy of acquired contour data. Furthermore, when the moving portion shifts relative to the base, the sensing device can promptly detect an abnormal scanning state by sensing the relative displacement between the moving portion and the base, thereby promptly controlling the scanning mechanism to stop moving and protect it.

[0010] Additionally, in the scanning mechanism of the present disclosure, optionally, when the moving portion is displaced relative to the base, the first elastic element or the second elastic element further accumulates elastic potential energy. In this case, during the accumulation of elastic potential energy, the first elastic element or the second elastic element can buffer friction or impact forces acting on the detection element, thereby reducing the impact of external forces on the scanning mechanism, thereby providing buffering protection for the scanning mechanism.

[0011] In addition, in the scanning mechanism involved in the present disclosure, optionally, the scanning mechanism includes a scanning axis, the detection element is connected to one end of the scanning axis, the connecting rod is parallel to the scanning axis, the moving part includes a first connecting block, the first connecting block is movably mounted on the connecting rod, and the base includes a second connecting block, the second connecting block is movably mounted on the connecting rod. In this case, since the connecting rod is parallel to the scanning axis, the first connecting block and the second connecting block can be moved along the scanning direction of the scanning mechanism. In addition, by movably mounting the first connecting block and the second connecting block on the connecting rod, the moving part can be movably connected to the base through the connecting rod. In addition, it is possible to facilitate the moving part to cooperate with the first fastener and the first elastic element on the connecting rod so that the protection system can achieve the preset function. In addition, it is possible to facilitate the base to cooperate with the second fastener and the second elastic element on the connecting rod so that the protection system can achieve the preset function.

[0012] In addition, in the scanning mechanism involved in the present disclosure, optionally, the elastic reset device includes a third fastener, the first fastener, the second fastener, and the third fastener are fixedly arranged on the connecting rod in sequence, the first elastic element is connected to the first fastener and the first connecting block, the first connecting block is located between the first fastener and the second fastener, the first elastic element is compressed so that the first connecting block abuts the second fastener, the second elastic element is connected to the second fastener and the second connecting block, the second connecting block is located between the second fastener and the third fastener, and the second elastic element is compressed so that the second connecting block abuts the third fastener. In this case, the first elastic element in a compressed state applies a thrust to the first connecting block so that the first connecting block abuts the second fastener, and the second elastic element in a compressed state applies a thrust to the second connecting block so that the second connecting block abuts the third fastener. Since the first fastener, the second fastener, and the third fastener are respectively fixed to the connecting rod, the first connecting block and the second connecting block can maintain a relatively stable relative static state. During the process of the detection element scanning the object to be detected, the sliding of the moving part relative to the base due to inertia can be suppressed, that is, the possibility of the moving part being displaced relative to the base due to inertia can be reduced. As a result, the scanning mechanism can have better stability.

[0013] In addition, in the scanning mechanism involved in the present disclosure, optionally, the elastic reset device includes a third fastener and a fourth fastener, the first fastener, the second fastener, the third fastener, and the fourth fastener are fixedly arranged on the connecting rod in sequence, the first elastic element is connected to the first fastener and the first connecting block, the first connecting block is located between the second fastener and the third fastener, the first elastic element is stretched so that the first connecting block abuts the second fastener, the second elastic element is connected to the third fastener and the second connecting block, the second connecting block is located on the side of the fourth fastener away from the third fastener, and the second elastic element is stretched so that the second connecting block abuts the fourth fastener. In this case, the first elastic element in a stretched state applies a pulling force to the first connecting block so that the first connecting block abuts the second fastener, and the second elastic element in a stretched state applies a pulling force to the second connecting block so that the second connecting block abuts the fourth fastener. Since the first fastener and the second fastener, as well as the third fastener and the fourth fastener are respectively fixed to the connecting rod, the first connecting block and the second connecting block can maintain a relatively stable relative static state. During the process of the detection element scanning the object to be detected, the sliding of the moving part relative to the base due to inertia can be suppressed, that is, the possibility of the moving part being displaced relative to the base due to inertia can be reduced. As a result, the scanning mechanism can have better stability.

[0014] In addition, in the scanning mechanism involved in the present disclosure, optionally, the first connecting block extends in the length direction of the connecting rod to form a hollow first extension portion, and the second connecting block extends in the length direction of the connecting rod to form a hollow second extension portion, wherein the first extension portion and the second extension portion can be movably mounted on the connecting rod. In this case, through the first extension portion, the first connecting block can be easily matched with the first fastener and the first elastic element on the connecting rod so that the protection system can achieve a preset function, thereby protecting the scanning mechanism. In addition, through the second extension portion, the second connecting block can be easily matched with the second fastener and the second elastic element on the connecting rod so that the protection system can achieve a preset function, thereby protecting the scanning mechanism 100.

[0015] In addition, in the scanning mechanism of the present disclosure, optionally, the first extension portion is movably mounted on the outer periphery of the first elastic element, the first elastic element is connected to the first fastener and the first connecting block, the first elastic element is stretched so that the first extension portion abuts the side of the first fastener facing the second fastener, and the second extension portion is movably mounted on the outer periphery of the second elastic element, the second elastic element is connected to the second fastener and the second connecting block, and the second elastic element is stretched so that the second extension portion abuts the side of the second fastener facing away from the first fastener. In this case, the first elastic element in a stretched state applies a pulling force to the first connecting block so that the first extension portion abuts the first fastener, and the second elastic element in a stretched state applies a pulling force to the second connecting block so that the second extension portion abuts the second fastener. Since the first fastener and the second fastener are respectively fixed to the connecting rod, a relatively stable relative static state can be maintained between the first connecting block and the second connecting block. During the process of the detection element scanning the object to be detected, the sliding of the moving portion relative to the base due to inertia can be suppressed, that is, the possibility of displacement of the moving portion relative to the base due to inertia can be reduced. Thus, the scanning mechanism can have better stability. In addition, the moving part and the base can be kept relatively still with fewer components, and the elastic reset device can occupy less space.

[0016] In addition, in the scanning mechanism of the present disclosure, optionally, the first extension portion is movably mounted on the outer periphery of the first elastic element and the first fastener, the first elastic element is connected to the first fastener and the first connecting block, the first elastic element is compressed so that the first extension portion abuts the side of the first fastener away from the second fastener, and the second extension portion is movably mounted on the outer periphery of the second elastic element and the second fastener, the second elastic element is connected to the second fastener and the second connecting block, and the second elastic element is compressed so that the second extension portion abuts the side of the second fastener toward the first fastener. In this case, the first elastic element in a compressed state applies a thrust to the first connecting block to abut the first fastener, and the second elastic element in a compressed state applies a thrust to the second connecting block to abut the second fastener. Since the first fastener and the second fastener are respectively fixed to the connecting rod, a relatively stable relative static state can be maintained between the first connecting block and the second connecting block. During the process of the detection element scanning the object to be detected, the sliding of the moving portion relative to the base due to inertia can be suppressed, that is, the possibility of displacement of the moving portion relative to the base due to inertia can be reduced. Thus, the scanning mechanism can have better stability. In addition, the moving part and the base can be kept relatively still with fewer components, and the elastic reset device can occupy less space.

[0017] In addition, in the scanning mechanism of the present disclosure, the sensing device may optionally include a sensing sheet disposed on the moving portion, and a sensing unit disposed on the base and cooperating with the sensing sheet. In this case, when the moving portion and the base undergo relative displacement, the sensing sheet and the sensing unit can simultaneously undergo relative displacement, thereby enabling the sensing device to sense the relative displacement between the moving portion and the base and generate a sensing signal.

[0018] According to the present disclosure, a scanning mechanism having a protection system can be provided, and the protection system can protect the scanning mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG. 1 is a schematic diagram showing a profilometer according to an example of the present disclosure.

[0020] FIG. 2 is a schematic diagram illustrating a scanning mechanism and a driving mechanism according to an example of the present disclosure.

[0021] FIG. 3 is a schematic diagram illustrating a scanning mechanism according to an example of the present disclosure.

[0022] FIG4 is a schematic diagram showing a protection system according to an example of the present disclosure.

[0023] FIG5 is a schematic diagram showing the position of the sensing device according to an example of the present disclosure.

[0024] FIG6 is a schematic diagram showing an elastic restoring device according to an example of the present disclosure.

[0025] FIG. 7A is a schematic diagram illustrating a first modified example of the elastic return device according to an example of the present disclosure.

[0026] FIG. 7B is a schematic diagram illustrating a second modified example of the elastic restoring device according to the example of the present disclosure.

[0027] FIG. 7C is a schematic diagram illustrating a third modified example of the elastic return device according to the present disclosure.

[0028] FIG. 7D is a schematic diagram illustrating a fourth modified example of the elastic return device according to the present disclosure.

[0029] FIG8 is a schematic diagram showing a cross section of a scanning mechanism according to an example of the present disclosure. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0031] It should be noted that the terms "first", "second", "third" and "fourth" in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices. In the following description, the same symbols are given to the same components, and repeated descriptions are omitted. In addition, the drawings are only schematic diagrams, and the ratios of the sizes of the components to each other or the shapes of the components may be different from the actual ones.

[0032] The present disclosure relates to a scanning mechanism with a protection system, which can protect the scanning mechanism and enable the scanning mechanism to have better stability.

[0033] In addition, the scanning mechanism of the present disclosure can be applied to a profile measuring instrument (i.e., a profilometer), and in particular, a contact profilometer. The contact profilometer can scan an object to be measured using the scanning mechanism of the present disclosure to obtain profile data of the object to be measured.

[0034] The scanning mechanism with a protection system involved in the present disclosure is described below with reference to the accompanying drawings.

[0035] Fig. 1 is a schematic diagram showing a profilometer 1 according to an example of the present disclosure. Fig. 2 is a schematic diagram showing a scanning mechanism 100 and a driving mechanism 200 according to an example of the present disclosure. Fig. 3 is a schematic diagram showing a scanning mechanism 100 according to an example of the present disclosure.

[0036] In some examples, referring to FIG1 , a profilometer 1 may include a workbench 300, a scanning mechanism 100, and a drive mechanism 200. The workbench 300 may be used to place and clamp an object to be measured (e.g., a workpiece to be measured). The scanning mechanism 100, driven by the drive mechanism 200, may scan the object to be measured on the workbench 300 to obtain contour data of the object to be measured.

[0037] In some examples, referring to FIG2 , the scanning mechanism 100 may include a detection element 20. The detection element 20 may be used to scan the object to be detected. In some examples, the detection element 20 may scan the object to be detected by contacting the object to be detected.

[0038] In some examples, the scanning mechanism 100 may include a scanning axis 10 and a measurement system 30 , wherein one end of the scanning axis 10 may be connected to the detection element 20 , and the other end may be connected to the measurement system 30 .

[0039] In some examples, the detection element 20 can be configured to contact the surface of the object to be measured and move along the surface of the object to be measured so as to move up and down along the contour of the object to be measured. In addition, the scanning axis 10 can be configured to transmit the up and down displacement of the detection element 20 to the measurement system 30. In addition, the measurement system 30 can be configured to obtain contour data of the object to be measured based on the up and down displacement of the detection element 20. In some examples, the contour data can include two-dimensional coordinates of the surface contour of the object to be measured.

[0040] In some examples, the detection element 20 may also be referred to as a probe or a stylus. In addition, the scanning axis 10 may also be referred to as a measuring axis.

[0041] In some examples, the scanning mechanism 100 can drive the detection element 20 to scan the object to be measured via the scanning axis 10. Specifically, the scanning mechanism 100 can move under the drive of the driving mechanism 200, so that the scanning axis 10 can drive the detection element 20 to contact the surface of the object to be measured and move on the surface of the object to be measured.

[0042] In some examples, referring to FIG. 1 or FIG. 2 , the driving mechanism 200 may include a first driving mechanism 210 and a second driving mechanism 220. The first driving mechanism 210 may drive the scanning mechanism 100 to move along the Z-axis direction, and the second driving mechanism 220 may drive the scanning mechanism 100 to move along the X-axis direction. In some examples, the second driving mechanism 220 may drive the scanning mechanism 100 to move along the X-axis direction by driving the first driving mechanism 210 to move along the X-axis direction.

[0043] In some examples, referring to FIG. 2 or FIG. 3 , the scanning mechanism 100 may include a base plate 50, which may be connected to the first driving mechanism 210. Alternatively, the base plate 50 may be used to support the scanning mechanism 100. In other words, the scanning mechanism 100 is disposed on the base plate 50. In this case, the first driving mechanism 210 can drive the scanning mechanism 100 to move along the Z-axis via the base plate 50. Alternatively, the second driving mechanism 220 can drive the scanning mechanism 100 to move along the X-axis by driving the first driving mechanism 210 to move along the X-axis.

[0044] In some examples, the first drive mechanism 210 drives the scanning mechanism 100 to move along the Z-axis direction so that the detection element 20 contacts the surface of the object to be measured, and the second drive mechanism 220 drives the scanning mechanism 100 to move along the X-axis direction so that the detection element 20 moves along the surface of the object to be measured to scan the surface of the object to be measured. In some examples, the X-axis direction can represent the scanning direction of the scanning mechanism 100.

[0045] Figure 4 is a schematic diagram showing a protection system 40 according to an example of the present disclosure. Figure 5 is a schematic diagram showing the position of a sensing device 46 according to an example of the present disclosure. Figure 6 is a schematic diagram showing an elastic return device 48 according to an example of the present disclosure.

[0046] In some examples, referring to FIG. 3 , the scanning mechanism 100 may include a protection system 40 , which may be configured to protect the scanning mechanism 100 .

[0047] 4 , a protection system 40 may include a base 44, a moving portion 42, and a sensing device 46. The moving portion 42 may be movably connected to the base 44, and the sensing device 46 may be used to detect whether relative displacement occurs between the base 44 and the moving portion 42.

[0048] In some examples, the protection system 40 may further include an elastic reset device 48. The movable portion 42 may be movably connected to the base 44 via the elastic reset device 48. Furthermore, the detection element 20 may be disposed on the movable portion 42. In this case, the movable portion 42 and the detection element 20 can move synchronously while the detection element 20 scans the object to be detected. Because the movable portion 42 and the base 44 are movably connected, changes in the motion state of the detection element 20 can cause changes in the motion state of the movable portion 42, thereby causing the movable portion 42 to move relative to the base 44.

[0049] In some examples, the moving portion 42 may be slidably disposed on the base 44 via an elastic reset device 48. Thus, the elastic reset device 48 can facilitate defining the movable connection relationship between the moving portion 42 and the base 44.

[0050] In some examples, the moving portion 42 can slide relative to the base 44, and the sliding direction of the moving portion 42 can be consistent with the scanning direction of the scanning mechanism 100. Thus, the moving portion 42 can slide relative to the base 44 along the scanning direction.

[0051] In some examples, the scanning axis 10 can be fixedly disposed on the moving portion 42. That is, the scanning axis 10 can be fixedly connected to the moving portion 42, and the detection element 20 can be connected to one end of the scanning axis 10. In this way, the detection element 20 can be disposed on the moving portion 42.

[0052] Specifically, referring to FIG4 , the scanning axis 10 can be fixedly connected to the moving portion 42 in a manner parallel to the X-axis, so that there is no relative movement between the scanning axis 10 and the moving portion 42 in the X-axis direction. In this case, the scanning axis 10 and the moving portion 42 can be linked in the X-axis direction, thereby enabling the scanning axis 10 to drive the moving portion 42 to slide relative to the base 44 along the X-axis direction.

[0053] In addition, the scanning shaft 10 can rotate relative to the moving portion 42 in the Z-axis direction. In this way, the detection element 20 can move up and down along the contour of the object when it moves on the surface of the object.

[0054] In some examples, when the second driving mechanism 220 drives the scanning mechanism 100 to move along the X-axis direction (for example, the positive direction of the X-axis) to drive the detection element 20 to scan the object to be measured, the base 44 and the moving part 42 can move together and simultaneously along the positive direction of the X-axis (that is, the base 44 and the moving part 42 can remain relatively stationary). When the detection element 20 is stuck by a pit or burr on the surface of the object to be measured, the scanning axis 10 no longer moves, and the moving part 42 connected to the scanning axis 10 also stops moving, but the base 44 continues to move along the positive direction of the X-axis, thereby causing the moving part 42 to be displaced relative to the base 44.

[0055] In addition, when the second driving mechanism 220 drives the scanning mechanism 100 to move along the X-axis direction (for example, the negative direction of the X-axis) to drive the detection element 20 to approach the object to be measured, the base 44 and the moving part 42 can move together and simultaneously along the negative direction of the X-axis (that is, the base 44 and the moving part 42 remain relatively stationary). When the detection element 20 collides with the object to be measured, the scanning axis 10 stops moving due to the obstruction of the object to be measured, and the moving part 42 connected to the scanning axis 10 also stops moving. However, the base 44 will continue to move along the negative direction of the X-axis, thereby causing the base 44 to be displaced relative to the moving part 42.

[0056] In some examples, when the scanning mechanism 100 drives the detection element 20 to scan the object to be detected, the relative displacement between the base 44 and the moving part 42 may indicate that the scanning mechanism 100 is in an abnormal scanning state.

[0057] In some examples, the sensing device 46 can generate a sensing signal when sensing the displacement of the moving portion 42 relative to the base 44. Thus, it is possible to promptly detect that the scanning mechanism 100 is in an abnormal scanning state.

[0058] In some examples, the sensing device 46 can generate a sensing signal when the moving portion 42 is displaced relative to the base 44 and the displacement exceeds a preset threshold. In this case, the sensing device 46 can monitor the displacement of the moving portion 42 relative to the base 44. When the displacement exceeds the preset threshold, the sensing device 46 emits a sensing signal, which can be used to promptly stop the scanning mechanism based on the sensing signal to protect the scanning mechanism from damage. In addition, the sensitivity of the sensing device 46 in detecting displacement can be adjusted by adjusting the preset threshold. In addition, by setting the preset threshold within an appropriate range, the influence of external interference (such as vibration) on the sensing device 46 can be eliminated, thereby improving the accuracy of the sensing device 46 in detecting displacement.

[0059] In some examples, the sensing device 46 can generate a first detection signal when the moving portion 42 and the base 44 remain relatively stationary. Alternatively, the sensing device 46 can generate a second detection signal (i.e., a sensing signal) when the moving portion 42 is displaced relative to the base 44 and the displacement exceeds a predetermined threshold.

[0060] In some examples, the preset threshold value can be manually set based on actual application needs. In some examples, the preset threshold value can be set based on the operating principle of the sensing device 46. For example, if the sensing device 46 is a photoelectric sensor, the preset threshold value can be a distance value; if the sensing device 46 is a force sensor, the preset threshold value can be a pressure value.

[0061] In some examples, the operation of the scanning mechanism 100 is controlled based on the sensing signal. Furthermore, in some examples, the scanning mechanism 100 can be stopped based on the sensing signal. In some examples, the profilometer 1 can control the scanning mechanism 100 to stop scanning based on the sensing signal. Specifically, the profilometer 1 can detect that the scanning mechanism 100 is in an abnormal scanning state based on the sensing signal, and thus can control the second drive mechanism 220 to stop driving the scanning mechanism 100, thereby stopping the scanning mechanism 100. In this case, when the scanning mechanism 100 is in an abnormal scanning state, by promptly stopping the scanning mechanism 100, the scanning mechanism 100 can be protected from damage.

[0062] However, the present disclosure is not limited thereto. In other examples, the scanning mechanism 100 may be controlled by an external device (e.g., a host computer), and the external device may control the scanning mechanism 100 to stop scanning based on the sensing signal. For example, the external device may cut off the power supply of the profilometer 1 based on the sensing signal, thereby causing the scanning mechanism 100 to stop scanning.

[0063] In some examples, referring to FIG4 , the sensing device 46 may include a sensing unit 460 and a sensing plate 464. The sensing unit 460 may cooperate with the sensing plate 464 to generate a sensing signal. In some examples, the sensing device 46 may generate the sensing signal in response to relative displacement between the sensing unit 460 and the sensing plate 464.

[0064] In some examples, the sensing unit 460 may be disposed on the base 44, and the sensing sheet 464 may be disposed on the moving portion 42. Specifically, the sensing unit 460 may be fixedly disposed on the base 44, and the sensing sheet 464 may be fixedly disposed on the moving portion 42. In this case, when the moving portion 42 and the base 44 undergo relative displacement, the sensing sheet 464 and the sensing unit 460 may also undergo relative displacement synchronously, thereby enabling the sensing device 46 to sense the relative displacement between the moving portion 42 and the base 44 and generate a sensing signal.

[0065] However, the present disclosure is not limited thereto, and in other examples, the sensing unit 460 may be fixedly disposed on the moving portion 42, and the sensing sheet 464 may be fixedly disposed on the base 44. Thus, the sensing device 46 can also sense the relative displacement between the moving portion 42 and the base 44 and generate a sensing signal.

[0066] In some examples, as shown in FIG5 , the sensing device 46 can be disposed above the moving portion 42 and the base 44. That is, the sensing unit 460 and the sensing sheet 464 can be located above the moving portion 42 and the base 44. In this case, when the sensing sheet 464 and the sensing unit 46 synchronously move relative to each other in response to the relative displacement of the moving portion 42 and the base 44, the sensing sheet 464 or the sensing unit 46 has more room to move. Furthermore, this allows the sensing device 46, the moving portion 42, and the base 44 to form a relatively compact structure.

[0067] Specifically, referring to FIG5 , the base 44 can be fixedly connected to the bottom plate 50, that is, the base 44 and the moving portion 42 can be disposed on the bottom plate 50. Furthermore, a bracket 466 can be fixedly disposed on the bottom plate 50, which is higher than the moving portion 42 and the base 44, and the sensing unit 460 can be fixedly disposed on the bracket 466. That is, by fixing the sensing unit 460 to the bracket 466, fixing the bracket 466 to the bottom plate 50, and fixing the base 44 to the bottom plate 50, the sensing unit 460 can be fixedly connected to the base 44 and positioned above the moving portion 42 and the base 44.

[0068] In addition, the sensing sheet 464 can be fixedly disposed on the top of the moving part 42, and the sensing sheet 464 can cooperate with the sensing unit 460 disposed on the bracket 466. In some examples, the sensing unit 460 can be located above the sensing sheet 464, and the sensing sheet 464 can be located below the sensing unit 460.

[0069] In some examples, as shown in FIG5 , the sensing unit 460 may have a slot 462 that extends along the scanning direction. Furthermore, the sensing sheet 464 may be in the shape of an elongated plate. The cooperation between the sensing sheet 464 and the sensing unit 460 may mean that when the sensing sheet 464 and the sensing unit 460 are relatively displaced, the sensing sheet 464 can be movably moved into or out of the slot 462, thereby causing the sensing device 46 to generate a sensing signal.

[0070] In some examples, the preset threshold value may be represented by the displacement of the sensing piece 464 relative to the sensing unit 460 , and the displacement may refer to the distance that the sensing piece 464 moves into or out of the sliding slot 462 .

[0071] In some examples, there may be two sensing devices 46, and the two sensing devices 46 may be arranged side by side along the scanning direction. For example, referring to FIG5 , the two sensing devices 46 are a first sensing device 46a and a second sensing device 46b, and the first sensing device 46a and the second sensing device 46b may be arranged side by side along the scanning direction. The first sensing device 46a may include a first sensing unit 460a and a first sensing plate 464a, wherein the first sensing unit 460a may further include a first slide groove 462a. Furthermore, the second sensing device 46b may include a second sensing unit 460b and a second sensing plate 464b, wherein the second sensing unit 460b may further include a second slide groove 462b.

[0072] Specifically, referring to FIG5 , the first sensing sheet 464a and the second sensing sheet 464b can be fixedly mounted on the top of the moving portion 42 in parallel along the scanning direction. Furthermore, the first sensing unit 460a can be fixedly mounted on the bracket 466 so that the end of the first sensing sheet 464a facing the negative direction of the X-axis is positioned in the first slot 462a, and the second sensing unit 460b can be fixedly mounted on the bracket 466 so that the end of the second sensing sheet 464b facing the positive direction of the X-axis is positioned in the second slot 462b. That is, when the moving portion 42 and the base 44 remain relatively stationary, the end of the first sensing sheet 464a facing the negative direction of the X-axis can be positioned in the first slot 462a, and the end of the second sensing sheet 464b facing the positive direction of the X-axis can be positioned in the second slot 462b.

[0073] However, the present disclosure is not limited to this. In other examples, when the moving part 42 and the base 44 remain relatively stationary, the end of the first sensing piece 464a facing the positive direction of the X-axis can be placed in the first slide groove 462a and the end of the second sensing piece 464b facing the negative direction of the X-axis can be placed in the second slide groove 462b.

[0074] In some examples, referring to FIG5 , when the scanning mechanism 100 drives the detection element 20 to move along the positive direction of the X-axis, when the moving portion 42 is displaced relative to the base 44, the first sensing piece 464a can be displaced relative to the first sensing unit 460a, that is, the first sensing piece 464a can stop moving with the moving portion 42, and the first slide groove 462a can move along the positive direction of the X-axis with the base 44 relative to the first sensing piece 464a to keep the first sensing piece 464a in the first slide groove 462a.

[0075] Accordingly, the second sensing piece 464b can be displaced relative to the second sensing unit 460b, that is, the second sensing piece 464b can stop moving along with the moving portion 42, and the second chute 462b can move along with the base 44 along the positive direction of the X-axis relative to the second sensing piece 464b so that the second sensing piece 464b moves out of the second chute 462b. The second sensing device 46b generates a sensing signal when the second sensing piece 464b moves out of the second chute 462b. In this case, the sensing signal generated by the second sensing device 46b can indicate that the scanning mechanism 100 is in an abnormal scanning state when the detection element 20 moves along the positive direction of the X-axis, thereby controlling the scanning mechanism 100 to stop moving along the positive direction of the X-axis.

[0076] In some examples, referring to FIG5 , during the process in which the scanning mechanism 100 drives the detection element 20 to move along the negative direction of the X-axis, when the base 44 is displaced relative to the moving part 42, the second sensing piece 464b can be displaced relative to the second sensing unit 460b, that is, the second sensing piece 464b can stop moving with the moving part 42, and the second slide groove 462b can move along the negative direction of the X-axis with the base 44 relative to the second sensing piece 464b to keep the second sensing piece 464b in the second slide groove 462b.

[0077] Accordingly, the first sensing piece 464a can be displaced relative to the first sensing unit 460a. That is, the first sensing piece 464a can stop moving along with the moving portion 42, and the first chute 462a can move along with the base 44 in the negative direction of the X-axis relative to the first sensing piece 464a so that the first sensing piece 464a moves out of the first chute 462a. The first sensing device 46a generates a sensing signal when the first sensing piece 464a moves out of the first chute 462a. In this case, the sensing signal generated by the first sensing device 46a indicates that the scanning mechanism 100 is in an abnormal scanning state when the detection element 20 moves in the negative direction of the X-axis, and the scanning mechanism 100 can be controlled to stop moving in the negative direction of the X-axis.

[0078] In summary, by arranging the first sensing device 46a and the second sensing device 46b in parallel along the scanning direction, the first sensing device 46a can be used to detect whether the scanning mechanism 100 is in an abnormal scanning state when the detection element 20 moves in the negative direction of the X-axis. Furthermore, the second sensing device 46b can be used to detect whether the scanning mechanism 100 is in an abnormal scanning state when the detection element 20 moves in the positive direction of the X-axis. This allows the protection system 40 to protect the scanning mechanism 100 in both directions along the X-axis.

[0079] Furthermore, corresponding protective measures can be taken based on abnormal scanning states of the scanning mechanism 100 in different movement directions. For example, if the scanning mechanism 100 is detected to be in an abnormal scanning state when the detection element 20 moves in the negative direction of the X-axis, the profilometer 1 can record the direction and time of the scanning mechanism 100's movement and alert the operator so that the operator can confirm whether the profilometer 1 needs to be recalibrated.

[0080] In some examples, the sensing device 46 may also be a sensor that senses deformation caused by displacement of the moving portion 42 relative to the base 44. For example, the sensing device 46 may be a force sensor, wherein the force sensor may have a sensitive unit that senses deformation caused by an external force.

[0081] In some examples, a force sensor can be mounted on base 44. When the moving portion 42 and base 44 undergo relative displacement or are prone to relative displacement, the moving portion 42 can apply pressure to the force sensor, which can cause a sensitive unit of the force sensor to deform. When the pressure exceeds a preset threshold, the force sensor can generate a sensing signal based on the deformation of the sensitive unit. This allows the force sensor to sense the displacement of the moving portion relative to the base and generate a sensing signal.

[0082] Additionally, in some examples, a force sensor may be mounted on the moving portion 42. When the moving portion 42 and the base 44 undergo relative displacement or are prone to relative displacement, the base 44 may apply pressure to the force sensor, causing the pressure to deform a sensitive element of the force sensor. When the pressure exceeds a preset threshold, the force sensor may also generate a sensing signal based on the deformation of the sensitive element.

[0083] In some examples, the force sensor may be, for example, a strain gauge force sensor, a piezoelectric force sensor, or a magnetostrictive force sensor.

[0084] As described above, referring to FIG6 , the protection system 40 may further include an elastic reset device 48. The elastic reset device 48 may be used to maintain the moving portion 42 and the base 44 relatively stationary. Furthermore, the elastic reset device 48 may be used to provide elastic potential energy to restore the moving portion 42 and the base 44 to their initial position. The initial position may be a position in which the moving portion 42 and the base 44 remain relatively stationary while the scanning mechanism 100 is scanning the object under test.

[0085] 6 , the elastic restoring device 48 may include a connecting rod 483 . The connecting rod 483 may be used to connect the base 44 and the moving part 42 .

[0086] In some examples, referring to FIG6 , the connecting rod 483 can be parallel to the scanning axis 10 and movably disposed between the base 44 and the moving portion 42. In this case, the connecting rod 483 can be parallel to the X-axis, so that the base 44 and the moving portion 42, which are sleeved on the connecting rod 483, can slide relative to each other along the scanning direction.

[0087] In some examples, referring to FIG. 6 , the movable portion 42 may include a first connecting block 420, which may be movably mounted on the connecting rod 483. That is, by movably mounting the first connecting block 420 on the connecting rod 483, the movable portion 42 may be movably mounted on the connecting rod 483. In this case, the first connecting block 420 may be movable along the scanning direction, thereby enabling the movable portion 42 to be movably connected to the connecting rod 483 and allowing the movable portion 42 to move along the scanning direction. This, in turn, facilitates the engagement of the movable portion 42 with the first fastener 484 and the first elastic element 481 (described later) on the connecting rod 483, enabling the protection system 40 to achieve a predetermined function.

[0088] In some examples, referring to FIG6 , the base 44 may include a second connecting block 440, which may be movably mounted on the connecting rod 483. That is, by movably mounting the second connecting block 440 on the connecting rod 483, the base 44 may be movably mounted on the connecting rod 483. In this case, the second connecting block 440 may be movable along the scanning direction, thereby enabling the base 44 to be movably connected to the connecting rod 483 and allowing the base 44 to move along the scanning direction. This, in turn, facilitates the engagement of the base 44 with the second fastener 485 and the second elastic element 482 (described later) on the connecting rod 483, enabling the protection system 40 to perform its intended functions.

[0089] In some examples, referring to FIG6 , the elastic reset device 48 may include a first elastic element 481 and a second elastic element 482, and a first fastener 484 and a second fastener 485. The first elastic element 481 and the second elastic element 482 may be used to store and release elastic potential energy. The first fastener 484 and the second fastener 485 may be fixedly mounted on the connecting rod 483.

[0090] In some examples, the first elastic element 481 can be connected to the first fastener 484 and the first connecting block 420. Alternatively, the second elastic element 482 can be connected to the second fastener 485 and the second connecting block 440. In this case, when the first elastic element 481 accumulates or releases elastic potential energy, the first elastic element 481 can apply an elastic force to the moving portion 42. Additionally, when the second elastic element 482 accumulates or releases elastic potential energy, the second elastic element 482 can apply an elastic force to the base 44.

[0091] In some examples, the first fastener 484 and the second fastener 485 can be respectively fixedly connected to the connecting rod 483. Thus, the first fastener 484 and the second fastener 485 can remain relatively stationary with the connecting rod 483.

[0092] In some examples, the first fastener 484 and the second fastener 485 can be fixedly connected to the connecting rod 483 by means of a threaded connection. In this case, the positions of the first fastener 484 and the second fastener 485 on the connecting rod 483 can be easily adjusted. When the first elastic element 481 is connected to the first fastener 484 and the first connecting block 420, the length of the first elastic element 481 can be adjusted by adjusting the position of the first fastener 484 on the connecting rod 483. In addition, when the second elastic element 482 is connected to the second fastener 485 and the second connecting block 440, the length of the second elastic element 482 can be adjusted by adjusting the position of the second fastener 485 on the connecting rod 483.

[0093] In some examples, the first elastic element 481 can be adjusted to a suitable length range based on the need for the motion portion 42 to cooperate with the first fastener 484 and the first elastic element 481. In other words, by adjusting the length of the first elastic element 481, the motion portion 42 can cooperate with the first fastener 484 and the first elastic element 481, thereby enabling the protection system 40 to achieve the desired function. Furthermore, in some examples, the second elastic element 482 can be adjusted to a suitable length range based on the need for the base 44 to cooperate with the second fastener 485 and the second elastic element 482. In other words, by adjusting the length of the second elastic element 482, the base 44 can cooperate with the second fastener 485 and the second elastic element 482, thereby enabling the protection system 40 to achieve the desired function.

[0094] Specifically, since the change in length of the elastic element is positively correlated with the elastic force of the elastic element, the elastic force (i.e., the first elastic force) applied by the first elastic element 481 to the first fastener 484 and the first connecting block 420 can be adjusted by adjusting the change in length of the first elastic element 481. Furthermore, the elastic force (i.e., the second elastic force) applied by the second elastic element 482 to the second fastener 485 and the second connecting block 440 can be adjusted by adjusting the change in length of the second elastic element 482. The first elastic force can cause the first connecting block 420 to remain stationary relative to the first fastener 484, thereby causing the moving portion 42 to remain stationary relative to the connecting rod 483. Furthermore, the second elastic force can cause the second connecting block 440 to remain stationary relative to the second fastener 485, thereby causing the base 44 to remain stationary relative to the connecting rod 483. Thus, the moving portion 42 and the base 44 can remain stationary relative to each other.

[0095] In some examples, the cooperation of the moving portion 42 with the first fastener 484 and the first elastic element 481 , and the cooperation of the base 44 with the second fastener 485 and the second elastic element 482 , can enable the protection system 40 to achieve a preset function.

[0096] Specifically, the moving portion 42 can be configured to cooperate with the first fastener 484 and the first elastic element 481, and the base 44 can be configured to cooperate with the second fastener 485 and the second elastic element 482 to achieve:

[0097] When the first elastic force applied by the first elastic element 481 to the moving portion 42 is greater than the friction force experienced by the detection element 20 when scanning the object to be measured, the moving portion 42 and the base 44 remain relatively stationary. Furthermore, when the second elastic force applied by the second elastic element 482 to the base 44 is greater than the friction force experienced by the detection element 20 when scanning the object to be measured, the moving portion 42 and the base 44 remain relatively stationary. In other words, when the first elastic force applied by the first elastic element 481 to the moving portion 42 or the second elastic force applied by the second elastic element 482 to the base 44 is greater than the friction force experienced by the detection element 20 when scanning the object to be measured, the moving portion 42 and the base 44 can remain relatively stationary. In this case, by keeping the moving portion 42 and the base 44 relatively stationary during the process of the scanning mechanism 100 driving the detection element 20 to scan the object to be measured, the sliding of the moving portion 42 relative to the base 44 due to inertia can be suppressed, thereby reducing the possibility of the moving portion 42 displacing relative to the base 44 due to inertia. As a result, the scanning mechanism 100 can have better stability, thereby improving the accuracy of acquiring contour data.

[0098] During the scanning process of the scanning mechanism 100 scanning the object to be measured, the moving portion 42 and the base 44 remain relatively stationary due to the following reasons: because the friction force applied to the detection element 20 is less than the first elastic force and the second elastic force, the friction force cannot break the relative stationary state of the moving portion 42 and the base 44, thereby allowing the moving portion 42 and the base 44 to remain relatively stationary. In other words, the friction force cannot cause the first elastic element 481 or the second elastic element 482 to deform again, and the moving portion 42 and the base 44 remain in a relatively stable stationary state under the action of the first elastic force and the second elastic force.

[0099] In some examples, the moving portion 42 can be configured to cooperate with the first fastener 484 and the first elastic element 481, and the base 44 can be configured to cooperate with the second fastener 485 and the second elastic element 482, so that: when the first elastic force is less than the friction force, the moving portion 42 is displaced relative to the base 44; and when the second elastic force is less than the friction force, the moving portion 42 is displaced relative to the base 44. In this case, the sensing device 46 can promptly detect that the scanning mechanism 100 is in an abnormal scanning state by sensing the relative displacement between the moving portion 42 and the base 44, thereby promptly controlling the scanning mechanism 100 to stop moving and protect the scanning mechanism 100.

[0100] During the process of the scanning mechanism 100 scanning the object to be tested, the reasons for the relative displacement of the moving part 42 and the base 44 may include: since the friction force exerted on the detection element 20 is greater than the first elastic force and the second elastic force, the friction force can break the state in which the moving part 42 and the base 44 remain relatively stationary, causing the moving part 42 and the base 44 to undergo relative displacement.

[0101] In addition, in some examples, the moving portion 42 can be configured to cooperate with the first fastener 484 and the first elastic element 481, and the base 44 can be configured to cooperate with the second fastener 485 and the second elastic element 482, so that: when the first elastic force is less than the impact force applied to the detection element 20, the moving portion 42 is displaced relative to the base 44; and when the second elastic force is less than the impact force applied to the detection element 20, the moving portion 42 is displaced relative to the base 44. In this case, the sensing device 46 can promptly detect that the scanning mechanism 100 is in an abnormal scanning state by sensing the relative displacement between the moving portion 42 and the base 44, thereby promptly controlling the scanning mechanism 100 to stop moving, thereby protecting the scanning mechanism 100.

[0102] In some examples, when the moving portion 42 is displaced relative to the base 44, the first elastic element 481 or the second elastic element 482 can further accumulate elastic potential energy. In this case, during the accumulation of elastic potential energy, the first elastic element 481 or the second elastic element 482 can buffer the friction or impact force exerted on the detection element 20, thereby reducing the impact of external forces on the scanning mechanism 100, thereby providing buffer protection for the scanning mechanism 100.

[0103] In some examples, the first elastic element 481 or the second elastic element 482 releases elastic potential energy to restore the moving portion 42 and the base 44 to their initial positions.

[0104] In some examples, when the scanning mechanism 100 drives the detection element 20 to scan the object to be measured, if the friction force applied to the detection element 20 is greater than the first elastic force or the second elastic force, the detection element 20 can be considered to be obstructed by the object to be measured. In addition, if the impact force applied to the detection element 20 is greater than the first elastic force or the second elastic force, the detection element 20 can be considered to be obstructed by the object to be measured.

[0105] In some examples, the detection element 20 being obstructed by the object to be detected may include, for example, the detection element 20 being stuck by a pit (or burr) on the surface of the object to be detected, or the detection element 20 colliding with the object to be detected.

[0106] FIG7A is a schematic diagram illustrating a first modified example of the elastic return device 48 according to an example of the present disclosure. FIG7B is a schematic diagram illustrating a second modified example of the elastic return device 48 according to an example of the present disclosure. FIG7C is a schematic diagram illustrating a third modified example of the elastic return device 48 according to an example of the present disclosure. FIG7D is a schematic diagram illustrating a fourth modified example of the elastic return device 48 according to an example of the present disclosure.

[0107] 7A and 7B , the first connecting block 420 may extend in the length direction of the connecting rod 483 (e.g., in the negative direction of the X-axis) to form a first extension portion 422. The first extension portion 422 may be hollow, i.e., the first extension portion 422 may have a hollow structure.

[0108] In some examples, the first extension portion 422 can be movably mounted on the connecting rod 483. Specifically, the first extension portion 422 can be movably mounted on the connecting rod 483 by placing the connecting rod 483 into a hollow structure. In this case, the first extension portion 422 facilitates the first connecting block 420 to cooperate with the first fastener 484 and the first elastic element 481 on the connecting rod 483, allowing the protection system 40 to perform its intended function and thereby protect the scanning mechanism 100.

[0109] 7A and 7B , the second connecting block 440 may extend in the length direction of the connecting rod 483 (e.g., in the negative direction of the X-axis) to form a second extension portion 442. The second extension portion 442 may be hollow, i.e., the second extension portion 442 may have a hollow structure.

[0110] In some examples, the second extension portion 442 can be movably mounted on the connecting rod 483. Specifically, the second extension portion 442 can be movably mounted on the connecting rod 483 by placing the connecting rod 483 into a hollow structure. In this case, the second extension portion 442 facilitates the second connecting block 440 to cooperate with the second fastener 485 and the second elastic element 482 on the connecting rod 483, allowing the protection system 40 to perform its predetermined function, thereby protecting the scanning mechanism 100.

[0111] The following describes the process of the movement portion 42 cooperating with the first fastener 484 and the first elastic element 481 , and the process of the base 44 cooperating with the second fastener 485 and the second elastic element 482 in combination with a plurality of modified examples.

[0112] [First Modification]

[0113] In some examples, referring to FIG7A , the first extension portion 422 can be movably mounted on the outer periphery of the first elastic element 481, the first elastic element 481 can be connected to the first fastener 484 and the first connecting block 420, and the first elastic element 481 can be stretched so that the first extension portion 422 abuts against the side of the first fastener 484 facing the second fastener 485. In other words, the cooperation between the moving portion 42, the first fastener 484, and the first elastic element 481 can include: the first extension portion 422 is movably mounted on the outer periphery of the first elastic element 481, one end of the first elastic element 481 can be connected to the first fastener 484 and the other end can be connected to the first connecting block 420, and the first elastic element 481 can apply a pulling force to the first connecting block 420 so that the first extension portion 422 abuts against the side of the first fastener 484 facing the second fastener 485.

[0114] 7A , the second extension portion 442 can be movably sleeved around the outer periphery of the second elastic element 482, the second elastic element 482 can be connected to the second fastener 485 and the second connecting block 440, and the second elastic element 482 can be stretched so that the second extension portion 442 abuts against the side of the second fastener 485 away from the first fastener 484. In other words, the cooperation between the base 44, the second fastener 485 and the second elastic element 482 may include: the second extension portion 442 is movably sleeved around the outer periphery of the second elastic element 482, one end of the second elastic element 482 can be connected to the second fastener 485 and the other end can be connected to the second connecting block 440, and the second elastic element 482 can apply a pulling force to the second connecting block 440 so that the second extension portion 442 abuts against the side of the second fastener 485 away from the first fastener 484.

[0115] 7A , when the scanning mechanism 100 moves along the positive direction of the X-axis, when the detection element 20 is blocked by the object to be measured, the scanning axis 10 stops moving, and the moving portion 42 connected to the scanning axis 10 stops moving, but the base 44 continues to move along the positive direction of the X-axis, thereby causing the base 44 to be displaced relative to the moving portion 42.

[0116] In addition, the second connecting block 440 continues to move along the positive direction of the X-axis with the base 44, so that the second extension portion 442 moves relative to the second fastener 485 to disengage the second extension portion 442 from the second fastener 485, and the second extension portion 442 can further stretch the second elastic element 482 to allow the second elastic element 482 to further accumulate elastic potential energy. In the process of accumulating elastic potential energy in the second elastic element 482, it can buffer the force caused by the detection element 20 being blocked by the object to be detected and the force applied to the detection element 20 by the object to be detected.

[0117] In addition, after the detection element 20 is free from the obstruction of the object to be measured, the second elastic element 482 releases the elastic potential energy to pull the second fastener 485 so that the second fastener 485 re-adheses to the second extension portion 442, thereby driving the moving part 42 to slide relative to the base 44 through the connecting rod 483, so that the moving part 42 and the base 44 return to their initial position where they remain relatively still.

[0118] 7A , when the scanning mechanism 100 moves in the negative direction of the X-axis, the detection element 20 is blocked by the object to be measured, and the scanning axis 10 stops moving. The moving portion 42 connected to the scanning axis 10 stops moving, but the base 44 continues to move in the negative direction of the X-axis, thereby causing the base 44 to be displaced relative to the moving portion 42.

[0119] In addition, the second connecting block 440 continues to move along the negative direction of the X-axis with the base 44, so that the second extension portion 442 drives the connecting rod 483 to move along the negative direction of the X-axis through the second fastener 485, and then the first fastener 484 moves relative to the first connecting block 420 to make the first fastener 484 break away from contact with the first extension portion 422, and the first fastener 484 can further stretch the first elastic element 481 to make the first elastic element 481 further accumulate elastic potential energy. In the process of accumulating elastic potential energy in the first elastic element 481, it can buffer the force caused by the detection element 20 being blocked by the object to be measured and the force applied to the detection element 20 by the object to be measured.

[0120] In addition, after the detection element 20 is free from the obstruction of the object to be measured, the first elastic element 481 releases the elastic potential energy to pull the first extension portion 422 so that the first extension portion 422 re-contacts the first fastener 484, thereby driving the moving portion 42 to slide relative to the base 44, so that the moving portion 42 and the base 44 return to their initial positions.

[0121] In this variation, the first elastic element 481 in a stretched state applies a pulling force to the first connecting block 420 so that the first extension 422 abuts the first fastener 484, and the second elastic element 482 in a stretched state applies a pulling force to the second connecting block 440 so that the second extension 442 abuts the second fastener 485. Because the first fastener 484 and the second fastener 485 are respectively fixed to the connecting rod 483, the first connecting block 420 and the second connecting block 440 can maintain a relatively stable relative static state. During the process of the detection element 20 scanning the object to be measured, the sliding of the moving portion 42 relative to the base 44 due to inertia can be suppressed, that is, the possibility of the moving portion 42 being displaced relative to the base 44 due to inertia can be reduced. As a result, the scanning mechanism 100 can have better stability. In addition, the moving portion 42 and the base 44 can be kept relatively static with fewer components, and the elastic reset device 48 occupies less space.

[0122] [Second Modification]

[0123] In some examples, referring to FIG. 7B , the first extension portion 422 may be movably mounted on the outer periphery of the first elastic element 481 and the first fastener 484. The first elastic element 481 may be connected to the first fastener 484 and the first connecting block 420. The first elastic element 481 may be compressed to cause the first extension portion 422 to abut against a side of the first fastener 484 away from the second fastener 485. In other words, the cooperation between the moving portion 42, the first fastener 484, and the first elastic element 481 may include: the first extension portion 422 is movably mounted on the outer periphery of the first elastic element 481 and the first fastener 484. The first elastic element 481 may apply a thrust to the first fastener 484 and the first connecting block 420. As a result of the thrust, the first extension portion 422 abuts against a side of the first fastener 484 away from the second fastener 485.

[0124] 7B , the second extension portion 442 can be movably mounted on the outer periphery of the second elastic element 482 and the second fastener 485. The second elastic element 482 can be connected to the second fastener 485 and the second connecting block 440. The second elastic element 482 can be compressed so that the second extension portion 442 abuts against the side of the second fastener 485 facing the first fastener 484. In other words, the cooperation between the base 44 and the second fastener 485 and the second elastic element 482 may include: the second extension portion 442 is movably mounted on the outer periphery of the second elastic element 482 and the second fastener 485, the second elastic element 482 can apply a thrust to the second fastener 485 and the second connecting block 440, and the second extension portion 442 abuts against the side of the second fastener 485 facing the first fastener 484 due to the thrust.

[0125] 7B , when the scanning mechanism 100 moves along the positive direction of the X-axis, when the detection element 20 is blocked by the object to be measured, the scanning axis 10 stops moving, and the moving portion 42 connected to the scanning axis 10 stops moving, but the base 44 continues to move along the positive direction of the X-axis, thereby causing the base 44 to be displaced relative to the moving portion 42.

[0126] In addition, the second connecting block 440 continues to move along the positive direction of the X-axis with the base 44, so that the second extension portion 442 drives the connecting rod 483 to move along the positive direction of the X-axis through the second fastener 485, and then the first fastener 484 moves relative to the first connecting block 420 to make the first fastener 484 break away from contact with the first extension portion 422, and the first fastener 484 can further compress the first elastic element 481 to make the first elastic element 481 further accumulate elastic potential energy. In the process of accumulating elastic potential energy in the first elastic element 481, it can buffer the force caused by the detection element 20 being blocked by the object to be measured and the force applied to the detection element 20 by the object to be measured.

[0127] In addition, after the detection element 20 is free from the obstruction of the object to be measured, the first elastic element 481 is used to release the elastic potential energy to push the first extension portion 422 so that the first extension portion 422 re-contacts the first fastener 484, thereby driving the moving portion 42 to slide relative to the base 44, so that the moving portion 42 and the base 44 return to their initial position where they remain relatively still.

[0128] Referring to FIG. 7B , when the scanning mechanism 100 moves in the negative direction of the X-axis, when the detection element 20 is blocked by the object to be measured, the scanning axis 10 stops moving, and the moving part 42 connected to the scanning axis 10 stops moving, but the base 44 continues to move in the negative direction of the X-axis, thereby causing the base 44 to be displaced relative to the moving part 42.

[0129] In addition, the second connecting block 440 continues to move along the negative direction of the X-axis with the base 44, so that the second extension portion 442 moves relative to the second fastener 485 to make the second extension portion 442 break away from the contact with the second fastener 485, and the second extension portion 442 can further compress the second elastic element 482 to make the second elastic element 482 further accumulate elastic potential energy. In the process of accumulating elastic potential energy in the second elastic element 482, it can buffer the force caused by the detection element 20 being blocked by the object to be measured and the force applied to the detection element 20 by the object to be measured.

[0130] In addition, after the detection element 20 is free from the obstruction of the object to be measured, the elastic potential energy released by the second elastic element 482 can push the second fastener 485 to move relative to the second connecting block 440 so that the second fastener 485 can re-contact the second extension portion 442, thereby driving the moving portion 42 to slide relative to the base 44 through the connecting rod 483, so that the moving portion 42 and the base 44 are restored to their initial position where they remain relatively still.

[0131] In this variation, the compressed first elastic element 481 applies a thrust to the first connecting block 420 so that the first extension 422 abuts the first fastener 484, and the compressed second elastic element 482 applies a thrust to the second connecting block 440 so that the second extension 442 abuts the second fastener 485. Since the first fastener 484 and the second fastener 485 are respectively fixed to the connecting rod 483, the first connecting block 420 and the second connecting block 440 can maintain a relatively stable relative static state. During the process of the detection element 20 scanning the object to be measured, the sliding of the moving portion 42 relative to the base 44 due to inertia can be suppressed, that is, the possibility of the moving portion 42 being displaced relative to the base 44 due to inertia can be reduced. As a result, the scanning mechanism 100 can have better stability. In addition, the moving portion 42 and the base 44 can be kept relatively static with fewer components, and the elastic reset device 48 occupies less space.

[0132] [Third Modification]

[0133] In some examples, referring to FIG. 7C , the elastic reset device 48 may further include a third fastener 486. The first fastener 484, the second fastener 485, and the third fastener 486 may be sequentially disposed on the connecting rod 483. In some examples, along the positive direction of the X-axis, the first fastener 484, the second fastener 485, and the third fastener 486 may be sequentially disposed on the connecting rod 483. Furthermore, the third fastener 486 may be connected to the connecting rod 483 in the same manner as the first fastener 484 or the second fastener 485 are connected to the connecting rod 483.

[0134] In some examples, referring to FIG7C , the first elastic element 481 can be connected to the first fastener 484 and the first connecting block 420, the first connecting block 420 can be located between the first fastener 484 and the second fastener 485, and the first elastic element 481 can be compressed to cause the first connecting block 420 to abut against the second fastener 485. In other words, the cooperation between the moving portion 42, the first fastener 484, and the first elastic element 481 can include: the first connecting block 420 and the first elastic element 481 are located between the first fastener 484 and the second fastener 485, and the first elastic element 481 applies a pushing force to the first fastener 484 and the first connecting block 420, respectively, to cause the first connecting block 420 to abut against the second fastener 485.

[0135] 7C , the second elastic element 482 may be connected to the second fastener 485 and the second connecting block 440, the second connecting block 440 may be located between the second fastener 485 and the third fastener 486, and the second elastic element 482 may be compressed to cause the second connecting block 440 to abut against the third fastener 486. In other words, the cooperation between the base 44 and the second fastener 485 and the second elastic element 482 may include: the second connecting block 440 and the second elastic element 482 are located between the second fastener 485 and the third fastener 486, and the second elastic element 482 applies a pushing force to the second fastener 485 and the second connecting block 440, respectively, to cause the second connecting block 440 to abut against the third fastener 486.

[0136] 7C , when the scanning mechanism 100 moves along the positive direction of the X-axis, the detection element 20 is blocked by the object to be measured, and the scanning axis 10 stops moving. The moving part 42 connected to the scanning axis 10 stops moving, but the base 44 continues to move along the positive direction of the X-axis, thereby causing the base 44 to be displaced relative to the moving part 42.

[0137] In addition, the second connecting block 440 continues to move along the positive direction of the X-axis with the base 44, so that the second connecting block 440 drives the connecting rod 483 to move along the positive direction of the X-axis through the third fastener 486, and then the second fastener 485 moves relative to the first connecting block 420 to make the second fastener 485 break away from the contact with the first connecting block 420, and the first fastener 484 also moves relative to the first connecting block 420, thereby further compressing the first elastic element 481 so that the first elastic element 481 further accumulates elastic potential energy. In the process of accumulating elastic potential energy in the first elastic element 481, it can buffer the force caused by the detection element 20 being blocked by the object to be measured and the force applied to the detection element 20 by the object to be measured.

[0138] In addition, after the detection element 20 is free from the obstruction of the object to be measured, the first elastic element 481 is used to release the elastic potential energy to push the first connecting block 420 so that the first connecting block 420 re-contacts the second fastener 485, thereby driving the moving part 42 to slide relative to the base 44, so that the moving part 42 and the base 44 return to their initial position where they remain relatively still.

[0139] Referring to FIG. 7C , when the scanning mechanism 100 moves in the negative direction of the X-axis, the detection element 20 is blocked by the object to be measured, and the scanning axis 10 stops moving. The moving portion 42 connected to the scanning axis 10 stops moving, but the base 44 continues to move in the negative direction of the X-axis, thereby causing the base 44 to be displaced relative to the moving portion 42.

[0140] In addition, the second connecting block 440 continues to move along the negative direction of the X-axis with the base 44, so that the second connecting block 440 moves relative to the third fastener 486 to disengage the second connecting block 440 from the third fastener 486, and the second connecting block 440 can further compress the second elastic element 482 to allow the second elastic element 482 to further accumulate elastic potential energy. In the process of accumulating elastic potential energy in the second elastic element 482, it can buffer the force caused by the detection element 20 being blocked by the object to be detected and the force applied to the detection element 20 by the object to be detected.

[0141] In addition, after the detection element 20 is free from the obstruction of the object to be tested, the elastic potential energy released by the second elastic element 482 can push the second fastener 485 toward the second connecting block 440, thereby driving the third fastener 486 to re-adhere to the second connecting block 440 through the connecting rod 483, and since the first connecting block 420 is in abutment with the second fastener 485, the first connecting block 420 can be pushed by the second fastener 485 to make the moving part 42 slide relative to the base 44, so that the moving part 42 and the base 44 return to their initial position where they remain relatively still.

[0142] In this modified example, the compressed first elastic element 481 applies a thrust to the first connecting block 420 so that the first connecting block 420 abuts the second fastener 485, and the compressed second elastic element 482 applies a thrust to the second connecting block 440 so that the second connecting block 440 abuts the third fastener 486. Since the first fastener 484, the second fastener 485, and the third fastener 486 are respectively fixed to the connecting rod 483, the first connecting block 420 and the second connecting block 440 can maintain a relatively stable relative static state. During the process of the detection element 20 scanning the object to be detected, the sliding of the moving portion 42 relative to the base 44 due to inertia can be suppressed, that is, the possibility of the moving portion 42 being displaced relative to the base 44 due to inertia can be reduced. As a result, the scanning mechanism 100 can have better stability.

[0143] [Fourth Modification]

[0144] In some examples, referring to FIG. 7D , the elastic return device 48 may include a third fastener 486 and a fourth fastener 487. The first fastener 484, the second fastener 485, the third fastener 486, and the fourth fastener 487 may be sequentially disposed on the connecting rod 483. In some examples, along the positive direction of the X-axis, the first fastener 484, the second fastener 485, the third fastener 486, and the fourth fastener 487 may be sequentially disposed on the connecting rod 483. Furthermore, the third fastener 486 and the fourth fastener 487 may be connected to the connecting rod 483 in the same manner as the first fastener 484 or the second fastener 485 is connected to the connecting rod 483.

[0145] In some examples, referring to FIG7D , the first elastic element 481 may be connected to the first fastener 484 and the first connecting block 420, the first connecting block 420 may be located between the second fastener 485 and the third fastener 486, and the first elastic element 481 may be stretched to cause the first connecting block 420 to abut against the second fastener 485. In other words, the cooperation between the moving portion 42 and the first fastener 484 and the first elastic element 481 may include: the first connecting block 420 may be located between the second fastener 485 and the third fastener 486, one end of the first elastic element 481 may be connected to the first fastener 484 and the other end may be connected to the first connecting block 420, and the first elastic element 481 may apply a tensile force to the first connecting block 420 to cause the first connecting block 420 to abut against the second fastener 485.

[0146] 7D , the second elastic element 482 may be connected to the third fastener 486 and the second connecting block 440, the second connecting block 440 may be located on a side of the fourth fastener 487 away from the third fastener 486, and the second elastic element 482 may be stretched to cause the second connecting block 440 to abut against the fourth fastener 487. In other words, the cooperation between the base 44, the second fastener 485, and the second elastic element 482 may include: the second connecting block 440 may be located on a side of the fourth fastener 487 away from the third fastener 486, one end of the second elastic element 482 may be connected to the third fastener 486 and the other end may be connected to the second connecting block 440, and the second elastic element 482 may apply a tensile force to the second connecting block 440 to cause the second connecting block 440 to abut against the fourth fastener 487.

[0147] 7D , when the scanning mechanism 100 moves along the positive direction of the X-axis, the detection element 20 is blocked by the object to be measured, and the scanning axis 10 stops moving. The moving part 42 connected to the scanning axis 10 stops moving, but the base 44 continues to move along the positive direction of the X-axis, thereby causing the base 44 to be displaced relative to the moving part 42.

[0148] In addition, the second connecting block 440 continues to move along the positive direction of the X-axis with the base 44, so that the second connecting block 440 moves relative to the fourth fastener 487 to disengage the second connecting block 440 from contact with the fourth fastener 487, and the second connecting block 440 can further stretch the second elastic element 482 to allow the second elastic element 482 to further accumulate elastic potential energy. In the process of accumulating elastic potential energy in the second elastic element 482, it can buffer the force caused by the detection element 20 being blocked by the object to be detected and the force applied to the detection element 20 by the object to be detected.

[0149] In addition, after the detection element 20 is free from the obstruction of the object to be measured, the elastic potential energy released by the second elastic element 482 can pull the third fastener 486 toward the second connecting block 440, thereby driving the fourth fastener 487 to re-connect with the second connecting block 440 through the connecting rod 483, and driving the moving part 42 to slide relative to the base 44 through the connecting rod 483, so that the moving part 42 and the base 44 are restored to their initial position where they remain relatively still.

[0150] Referring to FIG. 7D , when the scanning mechanism 100 moves in the negative direction of the X-axis, the detection element 20 is blocked by the object to be measured, and the scanning axis 10 stops moving. The moving part 42 connected to the scanning axis 10 stops moving, but the base 44 continues to move in the negative direction of the X-axis, thereby causing the base 44 to be displaced relative to the moving part 42.

[0151] In addition, the second connecting block 440 continues to move along the negative direction of the X-axis with the base 44, so that the second connecting block 440 drives the connecting rod 483 to move along the negative direction of the X-axis through the fourth fastener 487, and then the first fastener 484 and the second fastener 485 move relative to the first connecting block 420 to make the second fastener 485 break away from contact with the first connecting block 420, and the first fastener 484 can further stretch the first elastic element 481 to make the first elastic element 481 further accumulate elastic potential energy. In the process of accumulating elastic potential energy in the first elastic element 481, it can buffer the force caused by the detection element 20 being blocked by the object to be measured and the force applied to the detection element 20 by the object to be measured.

[0152] In addition, after the detection element 20 is free from the obstruction of the object to be measured, the first elastic element 481 is used to release the elastic potential energy to pull the first connecting block 420 so that the first connecting block 420 can re-contact the second fastener 485, and the first connecting block 420 can drive the moving part 42 to slide relative to the base 44, so that the moving part 42 and the base 44 are restored to their initial position where they remain relatively still.

[0153] In this variation, the first elastic element 481 in a stretched state applies a pulling force to the first connecting block 420 so that the first connecting block 420 abuts the second fastener 485, and the second elastic element 482 in a stretched state applies a pulling force to the second connecting block 440 so that the second connecting block 440 abuts the fourth fastener 487. Because the first fastener 484 and the second fastener 485, as well as the third fastener 486 and the fourth fastener 487, are respectively fixed to the connecting rod 483, the first connecting block 420 and the second connecting block 440 can maintain a relatively stable relative static state. During the process of the detection element 20 scanning the object to be detected, the sliding of the moving portion 42 relative to the base 44 due to inertia can be suppressed, that is, the possibility of the moving portion 42 being displaced relative to the base 44 due to inertia can be reduced. As a result, the scanning mechanism 100 can have better stability.

[0154] It should be noted that the matching relationship between the moving part 42 and the first fastener 484 and the first elastic element 481 involved in the above-mentioned various modifications, as well as the matching relationship between the base 44 and the second fastener 485 and the second elastic element 482 can be used in any combination in the protection system 40, and the present disclosure does not limit this.

[0155] FIG8 is a schematic diagram showing a cross section of the scanning mechanism 100 according to the example of the present disclosure.

[0156] In some examples, the first elastic element 481 may be a spring, and the first elastic element 481 may be sleeved on the connecting rod 483. In this case, when the first elastic element 481 releases its elastic potential energy, the stability of the elastic force (e.g., pulling force or pushing force) applied by the first elastic element 481 to the first connecting block 420 can be improved.

[0157] In addition, in some examples, the second elastic element 482 may be a spring, and the second elastic element 482 may be sleeved on the connecting rod 483. In this case, when the second elastic element 482 releases its elastic potential energy, the stability of the elastic force (e.g., pulling force or pushing force) applied by the second elastic element 482 to the second connecting block 440 can be improved.

[0158] 8 , the protection system 40 may further include a housing 52 . The housing 52 may cooperate with the base plate 50 to form a closed receiving chamber 54 .

[0159] In some examples, the base 44, the moving portion 42, the sensing device 46, and the elastic return device 48 may be located in a housing chamber 54. That is, referring to FIG8 , the base 44, the moving portion 42, the sensing device 46, and the elastic return device 48 may be disposed within a closed housing chamber 54 formed by the housing 52 and the bottom plate 50. This allows for better sealing and protection of the protection system 40.

[0160] According to the present disclosure, a scanning mechanism 100 having a protection system 40 can be provided. The protection system 40 can protect the scanning mechanism 100 and can ensure that the scanning mechanism 100 has good stability.

[0161] Although the present disclosure has been described in detail above with reference to the accompanying drawings and examples, it will be understood that the above description does not limit the present disclosure in any form. Those skilled in the art may modify and change the present disclosure as needed without departing from the spirit and scope of the present disclosure, and such modifications and variations all fall within the scope of the present disclosure.

Claims

1. A scanning mechanism with a protection system, the scanning mechanism comprising a detection element for scanning an object to be detected, characterized in that: The protection system includes a base, a moving part, a sensing device, and an elastic reset device. The detection element is arranged on the moving part, and the moving part is movably connected to the base through the elastic reset device. The sensing device senses that the moving part is displaced relative to the base and the displacement exceeds a preset threshold value to generate a sensing signal, and the scanning mechanism is stopped scanning based on the sensing signal.

2. The scanning mechanism according to claim 1, characterized in that: The detection element scans the object to be detected by abutting against the object to be detected, and the elastic reset device includes a first elastic element, a second elastic element, a connecting rod movably arranged between the base and the moving part, and a first fastener and a second fastener fixedly arranged on the connecting rod. The moving part is configured to cooperate with the first fastener and the first elastic element, and the base is configured to cooperate with the second fastener and the second elastic element to achieve: when the first elastic force applied by the first elastic element to the moving part or the second elastic force applied by the second elastic element to the base is greater than the friction force received by the detection element when scanning the object to be detected, the moving part and the base remain relatively stationary; when the first elastic force or the second elastic force is less than the friction force, the moving part is displaced relative to the base; when the first elastic force or the second elastic force is less than the impact force received by the detection element, the moving part is displaced relative to the base.

3. The scanning mechanism according to claim 2, characterized in that: When the moving part is displaced relative to the base, the first elastic element or the second elastic element further accumulates elastic potential energy.

4. The scanning mechanism according to claim 2, characterized in that: The scanning mechanism includes a scanning axis, the detection element is connected to one end of the scanning axis, the connecting rod is parallel to the scanning axis, the moving part includes a first connecting block, the first connecting block can be movably mounted on the connecting rod, and the base includes a second connecting block, and the second connecting block can be movably mounted on the connecting rod.

5. The scanning mechanism according to claim 4, characterized in that: The elastic reset device includes a third fastener, the first fastener, the second fastener, and the third fastener are fixedly arranged on the connecting rod in sequence, the first elastic element is connected to the first fastener and the first connecting block, the first connecting block is located between the first fastener and the second fastener, the first elastic element is compressed to make the first connecting block abut against the second fastener, the second elastic element is connected to the second fastener and the second connecting block, the second connecting block is located between the second fastener and the third fastener, and the second elastic element is compressed to make the second connecting block abut against the third fastener.

6. The scanning mechanism according to claim 4, characterized in that: The elastic reset device includes a third fastener and a fourth fastener, the first fastener, the second fastener, the third fastener, and the fourth fastener are fixedly arranged on the connecting rod in sequence, the first elastic element is connected to the first fastener and the first connecting block, the first connecting block is located between the second fastener and the third fastener, the first elastic element is stretched to make the first connecting block abut against the second fastener, the second elastic element is connected to the third fastener and the second connecting block, the second connecting block is located on the side of the fourth fastener away from the third fastener, and the second elastic element is stretched to make the second connecting block abut against the fourth fastener.

7. The scanning mechanism according to claim 4, characterized in that: The first connecting block extends in the length direction of the connecting rod to form a hollow first extension portion, and the second connecting block extends in the length direction of the connecting rod to form a hollow second extension portion, wherein the first extension portion and the second extension portion can be movably mounted on the connecting rod.

8. The scanning mechanism according to claim 7, characterized in that: The first extension portion is movably mounted on the outer periphery of the first elastic element, the first elastic element is connected to the first fastener and the first connecting block, the first elastic element is stretched so that the first extension portion abuts against a side of the first fastener facing the second fastener, the second extension portion is movably mounted on the outer periphery of the second elastic element, the second elastic element is connected to the second fastener and the second connecting block, and the second elastic element is stretched so that the second extension portion abuts against a side of the second fastener away from the first fastener.

9. The scanning mechanism according to claim 7, characterized in that: The first extension portion is movably mounted on the outer periphery of the first elastic element and the first fastener, the first elastic element is connected to the first fastener and the first connecting block, the first elastic element is compressed so that the first extension portion abuts against a side of the first fastener away from the second fastener, the second extension portion is movably mounted on the outer periphery of the second elastic element and the second fastener, the second elastic element is connected to the second fastener and the second connecting block, and the second elastic element is compressed so that the second extension portion abuts against a side of the second fastener facing the first fastener.

10. The scanning mechanism according to claim 1, characterized in that: The sensing device comprises a sensing sheet arranged on the moving part, and a sensing unit arranged on the base and matched with the sensing sheet.

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