A device for detecting a button claw

Abstract

The application discloses a device for detecting button exposed claws, which comprises a driving mechanism, a moving mechanism and a detecting mechanism. The moving mechanism comprises a moving assembly and a telescopic assembly. The telescopic assembly is movably provided with an inner sleeve and a first reset member in an outer sleeve. The driving mechanism drives the outer sleeve to move through the moving assembly. The inner sleeve hits the inner bent part of the button during the movement and is blocked due to the inner bent part. The detecting mechanism is provided with a discharging cavity and a limiting part arranged on the side of the discharging cavity. A first detecting cover is arranged on the side of the discharging cavity away from the moving assembly. The first detecting hole in the first detecting cover is configured to allow the inner sleeve to pass through and prevent the outer sleeve from passing through, so that the outer bent inclined part of the outer bent button is pressed against the outer sleeve, thereby forcing the outer sleeve to be blocked. A second detecting cover is further arranged on the side of the first detecting cover away from the discharging cavity to physically interfere with the outer bent parallel part. The inner bent part and the outer bent part are clearly distinguished by the blocked interference of the inner sleeve and the outer sleeve.

Description

Technical Field

[0001] This invention relates to the field of garment processing technology, and in particular to a device for detecting exposed claws on buttons. Background Technology

[0002] In the garment manufacturing industry, claw fasteners are typically installed onto clothing fabrics using riveting equipment. A claw fastener generally consists of a main claw and multiple pointed claws distributed around its periphery. Before riveting, the claw fasteners need to be positioned and moved to the installation station, where a pressing device then presses the fastener ring and claw fastener together. However, during the incoming material process, the pointed claws may exhibit undesirable shapes, such as inward or outward bending. If such defective products are installed on clothing, the protruding pointed claws can easily scratch the wearer. Therefore, effectively inspecting the shape of the pointed claws before they are loaded onto the garment and sent to the riveting station is of significant practical importance.

[0003] In existing technologies, such as the button anti-exposed claw detection and installation machine disclosed in CN220092167U, the working principle is as follows: the lifting rod pushes the claw buckle on the positioning sleeve towards the discharge port, so that the claw tip extends outside the discharge port, and the diameter of the discharge port matches the outer diameter formed by the claw tips of the qualified claw buckle. If the claw tip bends inward, the inwardly offset claw tip will be stuck at the discharge port; if the claw tip bends outward, the outwardly offset claw tip will touch the clamping claw and cannot reach the discharge port smoothly. Regardless of whether it bends inward or outward, the lifting rod cannot continue to move to the normal ejection height. The detection sensor determines whether the claw buckle is qualified by detecting whether the ejection position of the lifting rod reaches the set value.

[0004] Analysis reveals that the aforementioned technical solution employs only one detection channel and a single sensor, essentially rendering the detection result a binary criterion for whether the material can pass through the discharge port. When the lifting rod fails to reach the preset height, the system can only detect a defect in the claw buckle, unable to distinguish whether it's due to inward or outward bending. In continuous production, inward and outward bending often point to different sources of process anomalies. If the detection system can accurately differentiate between these two defect types, it can provide a basis for fault location in upstream processes. Furthermore, compared to inwardly bent claw buckles, which are typically scrapped, outwardly bent claw buckles can be corrected and reloaded through a shaping process, making the distinction valuable in terms of material utilization. In conclusion, the existing technology suffers from the technical deficiency of being unable to distinguish whether defective claw buckles are inwardly or outwardly bent. Summary of the Invention

[0005] The main objective of this invention is to provide a device for detecting exposed claws on buttons, aiming to solve the technical problem that existing technologies cannot distinguish whether defective claw buttons are bent inwards or outwards.

[0006] To achieve the above objectives, the present invention provides a device for detecting exposed claws on buttons, comprising:

[0007] Drive mechanism;

[0008] The motion mechanism includes an actuating component that is driven by a drive mechanism, and a telescopic component. The telescopic component includes an inner sleeve and an outer sleeve. The inner sleeve is movably disposed inside the outer sleeve. The outer sleeve also has a first reset member that mates with the inner sleeve. One side of the inner sleeve contacts the first reset member, and the other side protrudes from the outer sleeve. The end of the outer sleeve protruding from the inner sleeve forms an annular surface for carrying the claw buckle to be tested. The actuating component is configured to transmit the output of the drive mechanism to the outer sleeve, causing the outer sleeve to move and impact the inner annular portion of the claw buckle to be tested through the inner sleeve.

[0009] The detection mechanism, located on the side of the telescopic assembly away from the actuating assembly, includes a discharge chamber and a limiting part. The telescopic assembly extends into the discharge chamber, and the limiting part is located on the side of the discharge chamber and is configured to restrict the movement of the claw buckle under test when the inner kit impacts it, so that when the claw buckle under test has an inwardly curved portion, the inner kit is blocked by the inwardly curved portion and cannot continue to move. It also includes a first detection cover, which is located in the discharge chamber on the side away from the telescopic assembly. The first detection cover has a first detection hole concentric with the outer kit and the inner kit. The size of the first detection hole is configured to allow the inner kit and non-outwardly curved claw buckles to pass through, so that the inner kit can pass through. When the outer kit approaches the first detection cover, the portion of the first detection cover surrounding the first detection hole abuts against the outwardly curved oblique portion of the claw buckle under test.

[0010] Furthermore, the actuation component includes a first actuating element and a second actuating element. A positioning element for maintaining the coaxiality of the first and second actuating elements is provided between them. The first actuating element is connected to the drive mechanism and transmits power to the second actuating element. The second actuating element is connected to the outer sleeve. A second reset element is provided between the first and second actuating elements. When the outer sleeve is blocked due to the outward bending of the claw buckle under test, and cannot continue to move in the output direction of the drive mechanism, the first actuating element overcomes the resistance of the second reset element and abuts against the second actuating element. The first or second actuating element is provided with an outward bending sensor. The first and second actuating elements have facing end faces. The sensing end of the outward bending sensor is set on the corresponding end face of the first or second actuating element and generates a signal when the two abut against each other.

[0011] Furthermore, an inward bending sensor is provided below the actuation component. Both the outer kit and the actuation component are provided with a passage structure. The inner kit is provided with a trigger on the side of the first reset component. The trigger passes through the passage structure of the outer kit and the actuation component in sequence and is aligned with the sensing end of the inward bending sensor. When the inner kit is blocked from continuing to move in the output direction of the drive mechanism due to the inward bending of the claw buckle under test, the lower part of the trigger moves to a position aligned with the sensing end of the inward bending sensor, and the inward bending sensor generates a signal.

[0012] Furthermore, the structure can be a through hole or channel.

[0013] Furthermore, it also includes a mounting frame, which is configured as the mounting reference for the drive mechanism, motion mechanism, and detection mechanism. The drive mechanism, motion mechanism, and detection mechanism are arranged linearly and sequentially on the mounting frame. A guide mechanism is provided between the mounting frame and the motion component. The guide mechanism includes a slide rail and a slider. The slide rail is fixed to the mounting frame, and the slider is fixed to the motion component.

[0014] Furthermore, a limiting structure is provided between the outer and inner components to prevent the inner component from detaching from the outer component; the limiting structure consists of an outer step surface and an inner step surface formed by the outer and inner components respectively, and the outer component limits the inner component by abutting against the inner step surface through the outer step surface.

[0015] Furthermore, it also includes a button outlet seat, which has a button delivery channel, the button delivery channel including a first end and a second end, the first end being configured to receive the claw buckle to be tested, the second end being the discharge chamber, and the limiting part being two clamps rotatably connected to the side of the discharge chamber.

[0016] The present invention also proposes a device for detecting exposed claws on buttons, comprising:

[0017] Drive mechanism;

[0018] The motion mechanism includes an actuating component that is driven by a drive mechanism, and a telescopic component. The telescopic component includes an inner sleeve and an outer sleeve. The inner sleeve is movably disposed inside the outer sleeve. The outer sleeve also has a first reset member that mates with the inner sleeve. One side of the inner sleeve contacts the first reset member, and the other side protrudes from the outer sleeve. The end of the outer sleeve protruding from the inner sleeve forms an annular surface for carrying the claw buckle to be tested. The actuating component is configured to transmit the output of the drive mechanism to the outer sleeve, causing the outer sleeve to move and impact the inner annular portion of the claw buckle to be tested through the inner sleeve.

[0019] The detection mechanism is located on the side of the telescopic assembly away from the actuating assembly. It includes a discharge chamber and a limiting part. The telescopic assembly extends into the discharge chamber. The limiting part is located on the side of the discharge chamber and is configured to restrict the movement of the claw buckle under test when the inner kit impacts it. This is so that when the claw buckle under test has an inwardly curved portion, the inner kit is blocked by the inwardly curved portion and cannot continue to move. It also includes a first detection cover. The first detection cover is located in the discharge chamber on the side away from the telescopic assembly. The first detection cover has a first detection hole concentric with the outer kit and the inner kit. The size of the first detection hole is configured to allow the inner kit and non-outwardly curved claw buckles to pass through, so that the inner kit can pass through. When the outer kit approaches the first detection cover, the portion of the first detection cover surrounding the first detection hole abuts against the outwardly curved oblique portion of the claw buckle under test.

[0020] The first detection cover is movably disposed relative to the discharge cavity. A second detection cover is also provided on the side of the first detection cover away from the discharge cavity. The second detection cover is provided with a second detection hole concentric with the first detection hole. The second detection cover is fixedly disposed above the first detection cover. The second detection hole is constructed to match the outer contour of the qualified claw buckle so as to abut against the outer curved parallel part of the claw buckle to be tested.

[0021] Furthermore, the first detection cover is a split structure with two opposing half-covers. Each half-cover has a first detection hole in its middle. The two half-covers are slidably disposed at the open end of the discharge chamber and can slide in opposite directions to open, thereby opening the first detection hole.

[0022] Furthermore, it also includes a mounting bracket on which two clamping arms are rotatably connected. At least one of the clamping arms and the actuating component has an inclined surface to form an abutment engagement with the other. The half-cover has an insertion portion, the end of which extends into the insertion portion and rotates when it abuts with the actuating component, thereby causing the half-cover to open. A third reset member is provided between the clamping arms. The third reset member is configured to rotate the clamping arms back to their original position in response to the release of the abutment engagement between the clamping arms and the actuating component, and reset the half-cover to re-form the first detection hole.

[0023] The technical solution of this invention includes a driving mechanism, a motion mechanism, and a detection mechanism. The motion mechanism includes an actuating component and a telescopic component. An inner component and a first reset component are movably disposed within the outer casing of the telescopic component. The driving mechanism pushes the outer casing to move via the actuating component. During movement, the inner component impacts the inner curved portion of the claw buckle and is obstructed by the inner curve. The detection mechanism has a discharge chamber and a limiting part located on the side of the discharge chamber. A first detection cover is located on the side of the discharge chamber away from the actuating component. The first detection hole on the first detection cover is configured to allow the inner component to pass through while preventing the outer component from passing through, causing the outer curved oblique portion of the outer claw buckle to abut against the outer component, thereby forcing the outer component to be obstructed. A second detection cover is also located on the side of the first detection cover away from the discharge chamber to physically interfere with the parallel portion of the outer curve. This invention achieves a clear distinction between inner and outer curves through the obstruction and jamming of the inner and outer components. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the first embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the planar structure of the first embodiment of the present invention;

[0026] Figure 3 for Figure 2 Sectional view along section AA;

[0027] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle;

[0028] Figure 5 This is a three-dimensional structural diagram of the first embodiment of the present invention after the mounting bracket is hidden;

[0029] Figure 6 This is a partially exploded structural diagram of the knob seat according to the first embodiment of the present invention;

[0030] Figure 7 A schematic diagram of the mating structure between the knob seat and the limiting part;

[0031] Figure 8 A schematic diagram of the mating structure of the mounting bracket, the actuating components, and the clamping arm;

[0032] Figure 9 This is a schematic diagram showing the interaction between the motion mechanism and the inner and outer bending sensors.

[0033] Figure 10 This is a schematic diagram showing the disassembled and assembled motion mechanism with the inner and outer bending sensors.

[0034] Figure 11 This is a schematic diagram showing the cooperation between the telescopic component and the first detection cover;

[0035] Figure 12 This is a schematic diagram illustrating the detection principle of inward bending detection;

[0036] Figure 13 This is a schematic diagram illustrating the detection principle of slight outward bending.

[0037] Figure 14 This is a three-dimensional structural diagram of the second embodiment of the present invention;

[0038] Figure 15 This is a partial exploded view of the second detection cover.

[0039] Figure 16 This is a schematic diagram illustrating the detection principle of severe outward bending.

[0040] The above figures include the following reference numerals:

[0041] 10. Drive mechanism; 11. Drive component; 12. Planetary reducer; 13. Lifting linkage; 20. Motion mechanism; 21. Action component; 211A. First action component; 211B. Second action component; 212. Positioning component; 213. Second reset component; 22. Telescopic component; 221. Inner sleeve; 2211. Trigger component; 222. Outer sleeve; 2221. Annular surface; 223. First reset component; 224. Limiting structure; 30. Detection mechanism; 31. Discharge chamber; 32. Limiting 32a; 32b, clamp; 33, first detection cover; 33a; 33b, half cover; 33a1; 33a2, insertion part; 331, first detection hole; 34, second detection cover; 341, second detection hole; 40, external bending sensor; 50, internal bending sensor; 70, mounting bracket; 80, guide mechanism; 81, slide rail; 82, slider; 90, button seat; 91, buckle feeding channel; 911, first end; 912, second end; 100a; 100b, clamp arm. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0044] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0045] Existing technologies include button claw detection and installation machines, such as the one disclosed in CN220092167U. These machines use a discharge port that roughly matches the dimensions of a qualified claw to push the claw out towards the discharge port using a lifting rod. The pass / fail status of the claw is determined by whether the lifting rod reaches a preset height. However, this solution only has one detection channel and a single sensor, making the detection result essentially a binary criterion. When a claw cannot pass smoothly through the discharge port due to inward or outward bending, the system can only detect the defect but cannot distinguish whether it is caused by inward or outward bending. This lack of information prevents the detection process from providing effective evidence for fault location in upstream processes and hinders the implementation of differentiated post-processing measures for different types of defects. Therefore, this invention provides a device for detecting exposed button claws. The technical solution of this invention will be described in detail below with reference to the accompanying drawings.

[0046] First implementation method (claw buckle for detecting and distinguishing between inward curves and slight outward curves)

[0047] In embodiments of the present invention, such as Figures 1 to 13 As shown, the device for detecting exposed button claws includes a drive mechanism 10, a motion mechanism 20, and a detection mechanism 30. The drive mechanism 10 refers to the drive source of the entire device, including at least a drive component 11, and may include intermediate components such as a reducer, connecting rod, and output shaft fixing component, depending on the actual assembly. For example, in a preferred embodiment of the invention, when the drive component 11 uses a motor commonly used in riveting, a planetary reducer 12 and a lifting connecting rod 13 can be added to drive the motion mechanism 20 and the detection mechanism 30. The invention does not limit the choice of the drive component 11; however, under the premise of increasing automation requirements, a servo motor, stepper motor, or other suitable adapter should be selected.

[0048] Furthermore, the motion mechanism 20 includes an actuation component 21 that is transmissionally connected to the drive mechanism 10, and a telescopic component 22. The telescopic component 22 has an outer sleeve 222 and an inner sleeve 221. The inner sleeve 221 is movably disposed inside the outer sleeve 222. The outer sleeve 222 also has a first reset member 223 that cooperates with the inner sleeve 221. One side of the inner sleeve 221 contacts the first reset member 223, and the other side protrudes from the outer sleeve 222. The end of the outer sleeve 222 that protrudes from the inner sleeve 221 forms an annular surface 2221 for supporting the claw buckle to be tested. The actuation component 21 transmits the output of the drive mechanism 10 to the outer sleeve 222, causing the outer sleeve 222 to move, and impacts the inner ring portion of the claw buckle to be tested through the inner sleeve 221. It should be noted that the actuation component 21 is used to transmit the output of the drive mechanism 10 to the outer sleeve 222, causing the outer sleeve 222 to move. The actuation component 21 can be a one-piece structure or composed of multiple parts. The specific split structure will be described in subsequent embodiments. Preferably, the telescopic component 22 is shaped like a pipe or rod, which facilitates sliding.

[0049] The detection mechanism 30 is located on the side of the telescopic assembly 22 away from the actuating assembly 21. It includes a discharge chamber 31 and a limiting part 32. The telescopic assembly 22 extends into the discharge chamber 31. The limiting part 32 is located on the side of the discharge chamber 31 and is used to restrict the movement of the claw buckle under test when the inner sleeve 221 impacts it. This ensures that if the claw buckle under test has an inwardly curved portion, the inner sleeve 221 is obstructed by this inwardly curved portion and cannot continue to move. In other words, when the outer sleeve 222 and inner sleeve 221 move towards the discharge chamber 31, if the claw buckle under test located on the annular surface 2221 is inwardly curved, the inner sleeve 221 will directly impact this inwardly curved portion. Due to the limiting effect of the limiting part 32, the claw buckle under test will not be knocked away by the impact of the inner sleeve 221, but will instead provide resistance to the inner sleeve 221, preventing it from continuing to move. At this time, the inner sleeve 221 is obstructed. This obstruction of the inner sleeve 221 indicates a defective condition of the claw buckle under test, namely, an inwardly curved shape. The aforementioned first reset member 223 serves to maintain the relative position of the inner component 221 and the outer component 222, and simultaneously provides a reset force to the inner component 221 after the inner component 221 is obstructed or the detection action has ended. The first reset member 223 is an elastic component, such as a spring, sheet spring, disc spring, or other component that utilizes elastic properties to generate a reset function.

[0050] For outward bending detection, a first detection cover 33 is used. The detection mechanism 30 also includes a first detection cover 33, which is located in the discharge chamber 31 on the side away from the telescopic component 22. The first detection cover 33 has a first detection hole 331 concentric with the outer sleeve 222 and the inner sleeve 221. The size of the first detection hole 331 is configured to allow the inner sleeve 221 and the non-outward bending claw to pass through, so that the inner sleeve 221 can pass through. When the outer sleeve 222 approaches the first detection cover 33, the portion of the first detection cover 33 surrounding the first detection hole 331 abuts against the outward bending oblique portion of the claw to be tested. It should be understood that after completing the aforementioned inward bending detection, if the claw to be tested is not inwardly bent but outwardly bent, it cannot be detected by the impact of the inner sleeve 221. Therefore, detection is achieved here through the outer sleeve 222 and the first detection hole 331. In other words, when the outer sleeve 222 and the inner sleeve 221 move towards the discharge chamber 31, if the claw buckle to be tested on the annular surface 2221 is bent outwards, the wall portion of the first detection cover 33 outside the first detection hole 331 will directly form physical interference with the outwardly bent portion, and the outer sleeve 222 will be unable to continue moving. At this time, the outer sleeve 222 is obstructed, and the claw tip of the claw buckle to be tested cannot pass through the first detection hole 331. The obstruction of the outer sleeve 222 and the inability of the claw tip to pass through the first detection hole 331 indicate the defective condition of the claw buckle to be tested, namely, outward bending.

[0051] It should be noted that the obstruction of the inner component 221 and the obstruction of the outer component 222 constitute distinguishable physical characteristics at the mechanical level. Whether through manual observation, machine vision, or sensor detection, the type of defect can be identified based on this. The specific construction of the split-type motion component 21 and the sensor described below is a preferred implementation based on this mechanical distinction, aiming to convert mechanical displacement into electrical signals for automated detection. It is not a necessary prerequisite for achieving the distinction function.

[0052] In some embodiments of the present invention, the actuation component 21 is a split structure, comprising a first actuating element 211A and a second actuating element 211B. A positioning element 212 for maintaining the coaxiality of the first actuating element 211A and the second actuating element 211B is provided between them. The positioning element 212 may be a pin, guide rod, etc., and mainly undertakes positioning and guiding functions. The first actuating element 211A is connected to the drive mechanism 10 and transmits power to the second actuating element 211B. The second actuating element 211B is connected to the outer sleeve 222. A second reset element 213 is provided between the first actuating element 211A and the second actuating element 211B. When the outer sleeve 222 is blocked from continuing to move in the output direction of the drive mechanism 10 due to the outward bending of the test claw, the first actuating element 211A overcomes the resistance of the second reset element 213 and abuts against the second actuating element 211B. The first actuator 211A or the second actuator 211B is equipped with an external bending sensor 40. The first actuator 211A and the second actuator 211B have facing end faces. The sensing end of the external bending sensor 40 is disposed on the corresponding end face of the first actuator 211A or the second actuator 211B, and generates a signal when the two abut against each other. When the outer sleeve 222 is blocked by the first detection cover 33 due to the external bending of the claw buckle under test and cannot continue to move forward, the output movement of the drive mechanism 10 will not be directly locked. Instead, the first actuator 211A compresses the second reset member 213, causing the first actuator 211A to generate an additional displacement relative to the second actuator 211B, and finally abut against the second actuator 211B. This abutment state constitutes a definite external bending indication point at the mechanical level, so that the external bending abnormality can be independently identified and characterized, thereby breaking through the limitations of the binary criteria in the prior art. The function of the second reset member 213 is to maintain the initial relative position of the first action member 211A and the second action member 211B under unobstructed working conditions, and to reset them after the external bending detection action is completed. In addition to springs, the second reset member 213 can also be a spring sheet, disc spring or other components that can store and release elastic potential energy. This is a conventional choice made by those skilled in the art based on the installation space and reset requirements.

[0053] Furthermore, the placement of the external bending sensor 40 is a preferred means of converting this mechanical displacement into an electrical signal that can be recognized by the control system. In this embodiment, the sensing end of the external bending sensor 40 is disposed on the corresponding end face of the first actuating member 211A or the second actuating member 211B, and a signal is generated when the two come into contact. Understandably, the method of detecting the contact state is not unique. In addition to providing contact or non-contact sensors (such as microswitches, photoelectric sensors, and proximity switches) at the end face, the external bending state can also be indirectly determined by detecting whether the displacement of the first actuating member 211A exceeds the normal stroke threshold or by detecting whether the compression of the second reset member 213 reaches a preset value.

[0054] For inward bending detection, the actuation component 21 is not limited to being a single unit or separate units. An inward bending sensor 50 is located below the actuation component 21. Both the outer sleeve 222 and the actuation component 21 have a passage structure. The inner sleeve 221 has a trigger 2211 on the side contacting the first reset member 223. The trigger 2211 passes through the passage structures of the outer sleeve 222 and the actuation component 21 and aligns with the sensing end of the inward bending sensor 50. When the inner sleeve 221 is blocked due to inward bending of the claw being tested, preventing it from continuing to move in the output direction of the drive mechanism 10, the lower part of the trigger 2211 moves to a position aligned with the sensing end of the inward bending sensor 50, and the inward bending sensor 50 generates a signal. Similar to the aforementioned outward bending detection, this embodiment, through the cooperation of the trigger 2211 and the passage structure, ensures that the triggering timing of the inward bending sensor 50 precisely corresponds to the obstructed position of the inner sleeve 221, thereby enabling the output of an inward bending signal independently of outward bending anomalies.

[0055] The structure refers to any form of construction that allows the trigger 2211 to pass through and move together with the inner component 221. This can be implemented as a through hole, channel, notch, or clearance space, as long as it provides the trigger 2211 with degrees of freedom of movement relative to the outer component 222 and the actuating assembly 21. Those skilled in the art can flexibly select the appropriate structure based on the structural layout and manufacturing process. The trigger 2211's function is to transmit the displacement of the inner component 221 to a position that can be sensed by the sensor. Therefore, its form is not limited to an independent pin, rod, or protrusion; it can also be an integrally formed structure extending outward from the inner component 221 itself, as long as it can move synchronously with the inner component 221 and correspond to the sensing end of the inner bending sensor 50 at a preset position. The inner bending sensor 50 can also be selected in various ways. In addition to contact or non-contact sensors (such as photoelectric sensors, Hall effect sensors, and inductive proximity switches), a visual recognition mark can be set at the end of the trigger 2211, allowing the machine vision system to identify changes in the trigger 2211's position to determine the inner bending state.

[0056] In some embodiments of the present invention, the mounting bracket 70 serves as the mounting reference for the drive mechanism 10, the motion mechanism 20, and the detection mechanism 30. The drive mechanism 10, the motion mechanism 20, and the detection mechanism 30 are arranged linearly and sequentially on the mounting bracket 70. This linear series layout effectively simplifies the power transmission path, reduces the cumulative error of intermediate transmission links, and allows the output of the drive mechanism 10 to be directly transmitted to the telescopic component 22 and the detection mechanism 30 along a roughly straight axis. This helps to ensure the coaxiality between the inner component 221, the outer component 222, and the first detection hole 331, thereby improving the stability and consistency of the detection action. Compared with a structure where the drive source, the execution end, and the detection position are relatively dispersed, the linear arrangement scheme of this embodiment improves both structural compactness and transmission accuracy.

[0057] A guide mechanism 80 is provided between the mounting frame 70 and the actuating component 21 to constrain the movement direction of the actuating component 21, ensuring that it reciprocates strictly along a predetermined straight trajectory. The guide mechanism 80 adopts a sliding rail 81 and a slider 82 in cooperation. The sliding rail 81 is fixed to the mounting frame 70, and the slider 82 is fixed to the actuating component 21. When the drive mechanism 10 outputs power, the actuating component 21 slides smoothly along the sliding rail 81 with the slider 82, avoiding swaying or shaking due to uneven force, thereby ensuring that the pushing posture of the outer component 222 and the inner component 221 in the discharge chamber 31 is always accurate, and ensuring the reliability of the inner and outer bending detection actions.

[0058] The specific implementation of the guide mechanism 80 is not limited to the combination of slide rail 81 and slider 82. For example, it can be a combination of linear bearing and guide rod, dovetail groove and sliding block, roller and track, or the guide groove formed by the mounting bracket 70 itself can directly cooperate with the protrusion on the actuation component 21.

[0059] In some embodiments of the present invention, a limiting structure 224 is provided between the outer sleeve 222 and the inner sleeve 221 to prevent the inner sleeve 221 from detaching from the outer sleeve 222. The limiting structure 224 consists of an outer step surface and an inner step surface formed by the outer sleeve 222 and the inner sleeve 221, respectively. The outer sleeve 222 abuts against the inner step surface through the outer step surface to limit the inner sleeve 221. The limiting structure 224 is used to prevent the inner sleeve 221 from accidentally detaching from the outer sleeve 222, ensuring that the inner sleeve 221 and the outer sleeve 222 always maintain an axial relative positional relationship, thereby making the detection reference stable and reliable.

[0060] In this embodiment, the limiting structure 224 adopts a stepped surface abutment fit: the inner surface of the outer sleeve 222 forms an outer stepped surface, and the outer surface of the inner sleeve 221 forms a corresponding inner stepped surface. When the inner sleeve 221 extends outward to its limit position under the push of the first reset member 223, the outer stepped surface abuts against the inner stepped surface, preventing the inner sleeve 221 from moving further outward, thereby limiting the maximum extension of the inner sleeve 221 to a preset value. The advantage of this built-in stepped surface limiting method is that the limiting function is entirely achieved by the structural features of the outer sleeve 222 and the inner sleeve 221 themselves, without the need for additional independent stop parts, resulting in a simple and compact structure that is easy to assemble.

[0061] The specific implementation of the limiting structure 224 is not limited to stepped surface mating. For example, a closing structure or press-fit retaining ring can be provided at the end of the outer component 222 to mate with the flange on the outer wall of the inner component 221; a retaining ring or pin can be provided on the inner component 221 to mate with an annular groove or axial groove opened on the inner wall of the outer component 222. The terms "outer stepped surface" and "inner stepped surface" here should be interpreted broadly, not limited to right-angled steps formed by machining, but also mating surfaces with axial blocking function formed by processes such as stamping, flanging, and upsetting. Those skilled in the art can flexibly select specific limiting schemes according to the processing technology and assembly method of the parts.

[0062] In some embodiments of the present invention, a button holder 90 is also included, which has a button feeding channel 91. The button feeding channel 91 includes a first end 911 and a second end 912. The first end 911 is configured to receive the button to be tested, and the second end 912 is the discharge cavity 31. The limiting part 32 consists of two clamps 32a and 32b rotatably connected to the side of the discharge cavity 31. The first end 911 of the button feeding channel 91 receives the button to be tested from the feeding structure (such as a vibratory feeder, feeding track, etc.), and the second end 912 is the aforementioned discharge cavity 31. After entering the discharge cavity 31, the button to be tested rests on the annular surface 2221 of the outer sleeve 222, ready for testing. This integrated design of the button feeding channel 91 and the discharge cavity 31 makes the overall structure more compact.

[0063] The limiting part 32 employs two chucks 32a and 32b rotatably connected to the side of the discharge chamber 31. The space between the two chucks 32a and 32b is used for over-clamping. The width of this over-clamping space is configured to allow the jaw body of a qualified jaw to pass through, but when the inner sleeve 221 impacts the inner ring of the jaw to be tested, the chucks 32a and 32b abut against the jaw from the side and restrict its movement. When the jaw to be tested is a qualified product or an outwardly bent product, the impact force of the inner sleeve 221 acts on the inner ring of the jaw, and the jaw body can pass smoothly through the channel between the chucks 32a and 32b. When the jaw to be tested is an inwardly bent product, the inwardly bent pointed jaw is in the inner ring, so the entire jaw cannot pass through the channel between the chucks 32a and 32b, forcing the inner sleeve 221 to be obstructed. The rotatable connection of the chucks 32a and 32b gives it a certain degree of self-adjustment capability, which can automatically adjust the clamping posture according to the slight size differences of different jaws, avoiding jamming or damage to the jaw surface that may be caused by rigid limiting. A reset element can be provided between the two chucks 32a and 32b to maintain a preset clamping posture when not in operation.

[0064] The specific implementation of the limiting part 32 is not limited to the rotary-connected clamps 32a and 32b. For example, it can be a limiting step or limiting surface formed by the inward protrusion of the side wall of the discharge chamber 31; an annular groove on the side wall of the discharge chamber 31 that mates with the edge of the claw; or a closing structure made of elastic material that utilizes the elastic deformation of the material itself to provide limiting force. The clamps 32a and 32b referred to here should be interpreted broadly, not limited to two symmetrically arranged claws, but can also be a combination of a single-sided movable pressure block and a fixed wall on the opposite side, or multiple circumferentially distributed clamping pieces. The cross-sectional shape of the intermediate space of the clamps 32a and 32b can also be adapted to a circular, rectangular, or polygonal shape according to the outer contour of the claw. Those skilled in the art can flexibly select the limiting structure 224 according to the specific shape and size of the claw.

[0065] Second implementation method (for detecting and distinguishing claw buckles with severe outward bending)

[0066] like Figures 14 to 16 As shown, compared to the first embodiment, the second embodiment differs from the first embodiment only in that: the first detection cover 33 is movably disposed relative to the discharge chamber 31, and a second detection cover 34 is provided on the side of the first detection cover 33 away from the discharge chamber 31. The second detection cover 34 has a second detection hole 341 concentric with the first detection hole 331, and the second detection cover 34 is fixedly disposed above the first detection cover 33. To maintain its fixed position above the first detection cover 33, the second detection cover 34 can be installed using fasteners such as plates or rods. The second detection hole 341 is constructed to match the outer contour of the qualified claw buckle to abut against the outward curved parallel portion of the claw buckle to be tested. Other than this, the structure is the same as in the first embodiment.

[0067] Generally, defective claw buckles that bend outwards will exhibit a tilted outward bend, but in extreme cases, severely deformed defective claw buckles will exhibit a parallel outward bend. The second embodiment, building upon the first embodiment's ability to distinguish between inward bends and slight outward bends, further solves the problem that the first detection cover 33 cannot intercept severe outward bends.

[0068] Specifically, the interception of outward bending by the first detection cover 33 relies on the oblique extension of the outward bending portion of the claw buckle to be tested. When the claw tip bends outward in an oblique shape, its oblique portion has a certain axial projection length in the advancing direction. This portion will be stuck between the outer kit 222 and the first detection cover 33 when the outer kit 222 approaches, preventing the outer kit 222 from continuing to advance, thus being judged as an outward bending. However, when the outward bending shape of the claw tip is more severe and presents a completely parallel shape, that is, the claw tip is offset outward parallel to the claw buckle axis, the claw tip has almost no additional axial projection in the advancing direction. The outer kit 222 can carry the claw buckle almost the entire stroke, and the first detection cover 33 cannot effectively block it, resulting in a missed detection.

[0069] Therefore, in this embodiment, a second detection cover 34 is added to the side of the first detection cover 33 away from the discharge chamber 31. The second detection cover 34 has a second detection hole 341 concentric with the first detection hole 331 and is fixedly disposed above the first detection cover 33. The diameter of the second detection hole 341 matches the outer contour of the qualified claw buckle, that is, it is slightly larger than the maximum outer diameter of the qualified claw buckle. When the claw buckle to be tested is parallel outwardly curved, although it can pass through the first detection hole 331, its claw tip is offset parallel outward, causing the overall outer contour to increase, exceeding the allowable range of the second detection hole 341. The wall surface of the second detection cover 34 outside the second detection hole 341 will form a pure radial physical interference with the excess part, abutting against the parallel outwardly curved part of the claw buckle and preventing it from passing through. Thus, the second detection cover 34 compensates for the detection blind area that the first detection cover 33 cannot cover by limiting the axial height by limiting the radial dimension.

[0070] In some embodiments of the present invention, the first detection cover 33 is a split structure, having two opposing half-covers 33a and 33b. Each half-cover 33a and 33b has a portion with a first detection hole 331 in the middle. The two half-covers 33a and 33b are respectively slidably disposed at the open end of the discharge chamber 31 and can slide in opposite directions to open, thereby opening the first detection hole 331. The purpose of the split movement of the first detection cover 33 is that after the first detection cover 33 completes the initial screening of the outwardly curved oblique portion, it can actively give way to the detection path, allowing the claw buckle to continue to advance and contact the second detection cover 34 for the second-level detection of the outwardly curved parallel portion. Furthermore, the activity settings should be interpreted broadly, and the specific way to achieve this function is not limited to the form of the half cover 33a; 33b sliding open. It can also be: the first detection cover 33 is moved or flipped as a whole to move out of the detection path; or the first detection cover 33 and the discharge chamber 31 are detachably connected. During detection, the first detection cover 33 is installed for initial screening, and when final inspection is required, the first detection cover 33 is removed and the second detection cover 34 is used for inspection.

[0071] To achieve the opening and closing drive of the aforementioned half-covers 33a and 33b, a mounting bracket 70 is also included. Two clamping arms 100a and 100b are rotatably connected to the mounting bracket 70. At least one of the clamping arms 100a and 100b and the actuation component 21 is provided with an inclined surface to form an abutment fit with the other. The half-covers 33a and 33b are provided with insertion portions 33a1 and 33a2. The insertion portions 33a1 and 33a2 are groove structures or through-hole structures. The ends of the clamping arms 100a and 100b extend into the insertion portions 33a1 and 33a2, and rotate when they abut against the actuation component 21, causing the half-covers 33a and 33b to slide open in opposite directions, thereby opening the first detection hole 331. A third reset element is provided between the clamping arms 100a and 100b. When the detection action is completed, the clamping arms 100a and 100b disengage from the abutment of the actuation component 21. The third reset element drives the clamping arms 100a and 100b to rotate back to their original position. The ends of the clamping arms 100a and 100b drive the half-covers 33a and 33b to reset and slide, re-forming the complete first detection hole 331, preparing for the next detection cycle. This purely mechanical linkage method, which uses the stroke of the actuation component 21 to drive the opening and closing of the cover, ensures that the timing of the first detection cover 33's relocation is strictly synchronized with the detection stroke. No additional independent drive source is required, resulting in a simple structure and reliable operation.

[0072] There are several equivalent alternatives for the placement of the ramp. The ramp can be placed on the clamping arms 100a and 100b, or on the actuating assembly 21, or both can be equipped with ramps to reduce contact stress or obtain smoother driving characteristics.

[0073] The specific connection method of the clamping arms 100a and 100b driving the half-covers 33a and 33b is not limited to the engagement of the inserts 33a1 and 33a2. For example, the end of the clamping arms 100a and 100b and the half-covers 33a and 33b can be connected by a pin and a slot to compensate for the trajectory deviation when the rotational motion is converted into linear motion. Alternatively, an intermediate connecting rod can be added to transmit the rotational motion of the clamping arms 100a and 100b to the half-covers 33a and 33b. In terms of the drive source, in addition to using the motion stroke of the actuation component 21 to drive the clamping arms 100a and 100b, an independent micro cylinder, electromagnet, or motor can be set to directly drive the clamping arms 100a and 100b or the half-covers 33a and 33b to slide. The specific implementation of the third reset component includes springs, spring sheets, torsion springs, tension springs, etc., and its setting position is not limited to between the two clamping arms 100a and 100b. For example, two third reset components can be set and respectively set between each clamping arm 100a and 100b and the mounting bracket 70.

[0074] The following content serves as an explanation of the working principle of this invention.

[0075] The claw buckle to be tested enters the discharge chamber 31 through the first end 911 of the buckle feeding channel 91 and falls on the annular surface 2221 at the end of the outer sleeve 222. At this time, the limiting part 32 abuts against the claw buckle from the side, completing the positioning before testing.

[0076] The drive mechanism 10 outputs power, which is transmitted to the outer component 222 via the actuation component 21, pushing the outer component 222 and the inner component 221 forward together along the discharge chamber 31. The front end of the inner component 221 impacts the inner ring of the claw buckle under test. At this time, depending on the different defective shapes of the claw buckle, the following working conditions occur:

[0077] If the claw buckle under test has an internal bend defect, the internally bent claw tip is located in the inner ring area. When the front end of the inner component 221 is impacted, it directly acts on the internally bent claw tip, causing the inner component 221 as a whole to be unable to pass through the space between the chucks 32a and 32b, thus being blocked and unable to continue moving. This state of obstruction of the inner component 221 indicates that the claw buckle under test has an internal bend defect.

[0078] If the claw buckle under test has an outward bend, the inner fitting 221 passes smoothly through the inner ring of the claw buckle, and the claw buckle advances together with the outer fitting 222 to the first detection cover 33. At this time, the beveled part of the claw tip has an axial projection length in the advancing direction, and this part is stuck between the end face of the outer fitting 222 and the first detection cover 33, preventing the outer fitting 222 from advancing further. This state of obstruction of the outer fitting 222 indicates that the claw buckle under test has an outward bend defect.

[0079] If the claw buckle under test has a parallel outward bend, its claw tip has almost no axial projection in the advancing direction, and the first detection cover 33 cannot effectively intercept it. At this time, the first detection cover 33 drives the two halves of the cover 33a; 33b to open through the clamping arms 100a; 100b mechanism, making way for the detection path, and the claw buckle under test continues to advance to the second detection cover 34. The diameter of the second detection hole 341 matches the outer contour of the qualified claw buckle. The claw tip with a parallel outward bend exceeds the allowable range of this diameter and is blocked by the wall of the second detection cover 34 in a radial physical interference manner, and cannot pass through. Thus, the second detection cover 34 makes up for the detection blind spot of the first detection cover 33, which can only intercept inclined outward bends.

[0080] In summary, this invention distinguishes between inward and outward bends at a purely mechanical level by differentiating the movement of the inner component 221 and the outer component 222 under obstructed conditions. Furthermore, through two-stage filtration using the first detection cover 33 and the second detection cover 34, it achieves further detailed detection of tilted outward bends and parallel outward bends, thus fully covering the detection requirements for the three defective forms: inward bends, tilted outward bends, and parallel outward bends.

[0081] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the inventive concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A device for detecting exposed claws on buttons, characterized in that, include: Drive mechanism (10); The motion mechanism (20) includes an action component (21) that is connected to the drive mechanism (10) and a telescopic component (22). The telescopic component (22) includes an inner sleeve (221) and an outer sleeve (222). The inner sleeve (221) is movably disposed inside the outer sleeve (222). The outer sleeve (222) also has a first reset member (223) that cooperates with the inner sleeve (221). One side of the inner sleeve (221) contacts the first reset member (223), and the other side protrudes from the outer sleeve (222). The end of the outer sleeve (222) protruding from the inner sleeve (221) forms an annular surface (2221) for carrying the claw buckle to be tested. The action component (21) is configured to transmit the output of the drive mechanism (10) to the outer sleeve (222), causing the outer sleeve (222) to move and impact the inner ring portion of the claw buckle to be tested through the inner sleeve (221). The detection mechanism (30) is located on the side of the telescopic assembly (22) away from the action assembly (21), and includes a discharge chamber (31) and a limiting part (32). The telescopic assembly (22) extends into the discharge chamber (31), and the limiting part (32) is located on the side of the discharge chamber (31) and is configured to restrict the movement of the claw buckle under test when the inner sleeve (221) impacts it, so that when the claw buckle under test has an inward bend, the inner sleeve (221) is blocked by the inward bend and cannot continue to move. It also includes a first detection cover (33), which is located on the side of the telescopic assembly (22) away from the action assembly (21). The component (22) extends into the discharge chamber (31) on one side. The first detection cover (33) is provided with a first detection hole (331) concentric with the outer kit (222) and the inner kit (221). The size of the first detection hole (331) is configured to allow the inner kit (221) and the non-outer curved claw buckle to pass through, so that the inner kit (221) can pass through, and when the outer kit (222) approaches the first detection cover (33), the portion of the first detection cover (33) surrounding the first detection hole (331) abuts against the outer curved oblique portion of the claw buckle to be tested.

2. The apparatus as described in claim 1, characterized in that: The actuation component (21) includes a first actuating element (211A) and a second actuating element (211B). A positioning element (212) is provided between the first actuating element (211A) and the second actuating element (211B) to maintain their coaxiality. The first actuating element (211A) is connected to the drive mechanism (10) and transmits power to the second actuating element (211B). The second actuating element (211B) is connected to the outer sleeve (222). A second reset element (213) is provided between the first actuating element (211A) and the second actuating element (211B). When the outer sleeve (222) is moved due to the claw to be tested... When the outer bend is stuck and unable to continue moving in the output direction of the drive mechanism (10), the first action member (211A) overcomes the resistance of the second reset member (213) and abuts against the second action member (211B). The first action member (211A) or the second action member (211B) is provided with an outer bend sensor (40). The first action member (211A) and the second action member (211B) have facing end faces. The sensing end of the outer bend sensor (40) is set on the corresponding end face of the first action member (211A) or the second action member (211B) and generates a signal when the two abut against each other.

3. The apparatus as described in claim 1, characterized in that: An inner bending sensor (50) is provided below the action component (21). Both the outer sleeve (222) and the action component (21) are provided with a passage structure. The inner sleeve (221) is provided with a trigger (2211) on the side that contacts the first reset component (223). The trigger (2211) passes through the passage structure of the outer sleeve (222) and the action component (21) in sequence and is aligned with the sensing end of the inner bending sensor (50). When the inner sleeve (221) is blocked from continuing to move in the output direction of the drive mechanism (10) due to the inner bending of the claw buckle to be tested, the lower part of the trigger (2211) moves to a position aligned with the sensing end of the inner bending sensor (50), and the inner bending sensor (50) generates a signal.

4. The apparatus as described in claim 3, characterized in that: The structure is a through hole or channel.

5. The apparatus according to any one of claims 1 to 4, characterized in that: It also includes a mounting bracket (70), which is configured as the mounting reference for the drive mechanism (10), the motion mechanism (20), and the detection mechanism (30). The drive mechanism (10), the motion mechanism (20), and the detection mechanism (30) are arranged linearly and are sequentially mounted on the mounting bracket (70). A guide mechanism (80) is provided between the mounting bracket (70) and the motion component (21). The guide mechanism (80) includes a slide rail (81) and a slider (82). The slide rail (81) is fixed to the mounting bracket (70), and the slider (82) is fixed to the motion component (21).

6. The apparatus according to any one of claims 1 to 4, characterized in that: A limiting structure (224) is provided between the outer kit (222) and the inner kit (221) to prevent the inner kit (221) from detaching from the outer kit (222); the limiting structure (224) consists of an outer step surface and an inner step surface formed by the outer kit (222) and the inner kit (221) respectively, and the outer kit (222) limits the inner kit (221) by abutting against the inner step surface through the outer step surface.

7. The apparatus according to any one of claims 1 to 4, characterized in that: It also includes a button holder (90) having a buckle feeding channel (91) having a first end (911) and a second end (912). The first end (911) is configured to receive the claw buckle to be tested, the second end (912) is the discharge chamber (31), and the limiting part (32) consists of two clamps (32a; 32b) rotatably connected to the side of the discharge chamber (31).

8. A device for detecting exposed claws on buttons, characterized in that, include: Drive mechanism (10); The motion mechanism (20) includes an action component (21) that is connected to the drive mechanism (10) and a telescopic component (22). The telescopic component (22) includes an inner sleeve (221) and an outer sleeve (222). The inner sleeve (221) is movably disposed inside the outer sleeve (222). The outer sleeve (222) also has a first reset member (223) that cooperates with the inner sleeve (221). One side of the inner sleeve (221) contacts the first reset member (223), and the other side protrudes from the outer sleeve (222). The end of the outer sleeve (222) protruding from the inner sleeve (221) forms an annular surface (2221) for carrying the claw buckle to be tested. The action component (21) is configured to transmit the output of the drive mechanism (10) to the outer sleeve (222), causing the outer sleeve (222) to move and impact the inner ring portion of the claw buckle to be tested through the inner sleeve (221). The detection mechanism (30) is located on the side of the telescopic assembly (22) away from the action assembly (21), and includes a discharge chamber (31) and a limiting part (32). The telescopic assembly (22) extends into the discharge chamber (31), and the limiting part (32) is located on the side of the discharge chamber (31) and is configured to restrict the movement of the claw buckle under test when the inner sleeve (221) impacts it, so that when the claw buckle under test has an inward bend, the inner sleeve (221) is blocked by the inward bend and cannot continue to move. It also includes a first detection cover (33), which is located on the side of the telescopic assembly (22) away from the action assembly (21). The component (22) extends into the discharge chamber (31) on one side. The first detection cover (33) is provided with a first detection hole (331) concentric with the outer kit (222) and the inner kit (221). The size of the first detection hole (331) is configured to allow the inner kit (221) and the non-outer curved claw buckle to pass through, so that the inner kit (221) can pass through. When the outer kit (222) approaches the first detection cover (33), the portion of the first detection cover (33) surrounding the first detection hole (331) abuts against the outer curved oblique portion of the claw buckle to be tested. The first detection cover (33) is movably set relative to the discharge chamber (31). The side of the first detection cover (33) away from the discharge chamber (31) is also provided with a second detection cover (34). The second detection cover (34) is provided with a second detection hole (341) concentric with the first detection hole (331). The second detection cover (34) is fixedly set above the first detection cover (33). The second detection hole (341) is constructed to match the outer contour of the qualified claw buckle so as to abut against the outer curved parallel part of the claw buckle to be tested.

9. The apparatus as claimed in claim 8, characterized in that: The first detection cover (33) is a split structure with two opposing half covers (33a; 33b). Each half cover (33a; 33b) has a first detection hole (331) in the middle. The two half covers (33a; 33b) are slidably disposed at the open end of the discharge chamber (31) and can slide in opposite directions to open, thereby opening the first detection hole (331).

10. The apparatus as claimed in claim 9, characterized in that: It also includes a mounting bracket (70) on which two clamping arms (100a; 100b) are rotatably connected. At least one of the clamping arms (100a; 100b) and the actuating assembly (21) is provided with a bevel to form an abutment fit with the other. The half-cover (33a; 33b) is provided with an insertion part (33a1; 33a2). The end of the clamping arm (100a; 100b) extends into the insertion part (33a1; 33a2) and engages with the actuating assembly (21). When the actuating component (21) comes into contact, it rotates, causing the half cover (33a; 33b) to open; a third reset member is provided between the clamping arms (100a; 100b), which is configured to rotate the clamping arms (100a; 100b) back to their original position in response to the release of the contact between the clamping arms (100a; 100b) and the actuating component (21), and reset the half cover (33a; 33b) to re-form the first detection hole (331).

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