Battery cover appearance detection device

Abstract

The utility model belongs to battery production equipment technical field especially relates to a battery cover appearance detection device, including detection mechanism, limiting mechanism and rotating mechanism, detection mechanism is used for detecting the appearance state of button cell cover, limiting mechanism is provided with the limiting cavity for clamping button cell cover, and limiting mechanism is located below the monitoring end of detection mechanism, the output of rotating mechanism is connected with limiting mechanism drive, among them, limiting cavity penetrates limiting mechanism, and the button cell cover in limiting cavity is two mutually opposite end faces to be detected, and with rotating mechanism drive is sequentially oriented to detection mechanism. Through the collaborative design of rotating mechanism and the through limiting cavity, the button cell cover is independently turned over in the clamping state, so that the two mutually opposite end faces to be detected are sequentially oriented to the detection mechanism in a single station, effectively solving the defects of manual intervention or additional station for multi-face detection of traditional equipment.

Description

Technical Field

[0001] This utility model belongs to the technical field of battery production equipment, and in particular relates to a battery cover appearance inspection device. Background Technology

[0002] Traditional button battery cover appearance inspection devices typically use fixed fixtures to position the workpiece and rely on optical sensors or vision systems to acquire images and analyze defects on a single end face of the battery cover. During the inspection process, operators need to manually adjust the placement of the battery cover or switch inspection stations to complete the appearance inspection of different end faces. Although such devices can achieve basic surface feature recognition, they are limited by the fixed inspection layout, and a single inspection process can only cover one inspection surface of the battery cover. For scenarios requiring comprehensive inspection from multiple angles, manual intervention is required for repeated positioning, making it difficult to improve inspection efficiency, and manual contact may introduce the risk of secondary contamination.

[0003] In existing technologies, button battery cover appearance inspection devices generally lack a stable flipping mechanism, resulting in significant technical shortcomings in multi-faceted inspection processes. Traditional equipment cannot autonomously adjust the workpiece's posture after inspection, requiring manual intervention or additional stations to flip the battery cover. This not only increases equipment complexity and floor space but also easily leads to cumulative errors from multiple positioning attempts, affecting the consistency of inspection results. Furthermore, the mechanical structure design does not adequately consider the stability of workpiece clamping and the coordination of flipping movements, easily causing the battery cover to shift or fall off during transfer, further hindering the realization of fully automated inspection systems. Utility Model Content

[0004] The purpose of this utility model is to provide a battery cover appearance inspection device, which aims to solve the technical problem that existing battery cover appearance inspection equipment cannot automatically complete the workpiece posture adjustment after inspection, and requires manual intervention or additional workstations to achieve the battery cover flipping operation. This not only increases the complexity and floor space of the equipment, but also easily causes cumulative errors due to multiple positioning, affecting the consistency of the inspection results.

[0005] To achieve the above objectives, this utility model provides a battery cover appearance inspection device, including a detection mechanism, a limiting mechanism, and a rotating mechanism. The detection mechanism is used to detect the appearance of a button battery cover. The limiting mechanism is provided with a limiting cavity for clamping the button battery cover, and the limiting mechanism is located below the monitoring end of the detection mechanism. The output end of the rotating mechanism is driven and connected to the limiting mechanism. The limiting cavity extends through the limiting mechanism, and the two opposite end faces of the button battery cover located in the limiting cavity are driven towards the detection mechanism sequentially as the rotating mechanism drives them.

[0006] Optionally, the limiting mechanism includes a first limiting ring and a second limiting ring, the limiting cavity is formed between the first limiting ring and the second limiting ring, the inner rings of the first limiting ring and the second limiting ring are concentrically arranged, the detection end of the detection mechanism can pass through the inner rings of the first limiting ring and the second limiting ring to perform appearance inspection on the end face of the button battery cover to be inspected, and the two ends of the first limiting ring are fixedly connected to the output end of the rotating mechanism.

[0007] Optionally, the bottom of the first limiting ring is provided with a first receiving groove for accommodating the edge of the button battery cover, and the top of the second limiting ring is provided with a second receiving groove for accommodating the edge of the button battery cover. After the first limiting ring and the second limiting ring are stacked, the first receiving groove and the second receiving groove are combined to form the limiting cavity. The first receiving groove and the second receiving groove are respectively provided along the inner edge of the first limiting ring and the second limiting ring.

[0008] Optionally, a locking component is provided at the opening of the first receiving groove, the locking component being used to lock the second limiting ring within the first receiving groove.

[0009] Optionally, the locking assembly includes an elastic element, a movable block, and a fixed block. The fixed block is fixedly disposed on the side wall of the second limiting ring. The side wall of the first receiving groove is provided with a movable groove. The end of the movable block is slidably connected in the movable groove. The two ends of the elastic element abut against the inner wall of the movable groove and the side wall of the movable block, respectively. The elastic element can drive the end of the movable block away from the elastic element to move outside the movable groove and into the first receiving groove. A gap for accommodating the second limiting ring is provided between the end of the movable block and the top wall of the first receiving groove. After being driven by the elastic element, the starting end of the movable block can stop on the moving path of the fixed block.

[0010] Optionally, the bottom of the first limiting ring is provided with a relief groove, the movable block includes a stop part and a guide part, one end of the guide part is located in the movable groove, the other end of the guide part extends out of the first limiting ring from the relief groove, the guide part is slidably connected to the groove wall of the relief groove, the stop part is provided at one end of the guide part, and the elastic member abuts against the end of the guide part opposite to the stop part.

[0011] Optionally, the stop portion is provided with a conical structure, and the end face of the stop portion facing away from the first receiving groove is designed to be inclined.

[0012] Optionally, the fixing block is formed in a ring shape and covers the outer wall of the second limiting ring, and the outer diameter of the fixing block is equal to the groove diameter of the first receiving groove.

[0013] Optionally, the locking assembly includes a fixing block and a magnetic component. The fixing block is formed in a ring shape and covers the outer wall of the second limiting ring. The outer diameter of the fixing block is smaller than the groove diameter of the first receiving groove, and the outer diameter of the fixing block is larger than the inner diameter of the inner ring of the first limiting ring. The magnetic component is embedded in the top wall of the first receiving groove. The fixing block is made of a magnetically conductive metal material.

[0014] Optionally, the locking assembly includes a fixing block, a first magnetic component, and a second magnetic component. The fixing block is formed in a ring shape and covers the outer wall of the second limiting ring. The outer diameter of the fixing block is smaller than the groove diameter of the first receiving groove, and the outer diameter of the fixing block is larger than the inner diameter of the inner ring of the first limiting ring. The first magnetic component is embedded in the top wall of the first receiving groove, and the second magnetic component is disposed on the end face of the fixing block facing the first receiving groove. The ends of the first magnetic component and the second magnetic component that are opposite to each other are arranged with opposite magnetic poles.

[0015] The battery cover appearance inspection device provided in this utility model embodiment has at least one of the following technical effects: Through the coordinated design of the rotating mechanism and the through-type limiting cavity, the button battery cover can be autonomously flipped while being clamped, allowing the two opposite end faces to be inspected to be sequentially oriented to the inspection mechanism within a single station. This effectively solves the problem of traditional equipment requiring manual intervention or additional stations for multi-face inspection. The linkage mechanism of rotation drive and limiting clamping ensures workpiece stability while eliminating the risk of cumulative errors caused by multiple positioning operations. This improves inspection efficiency and consistency, and the integrated structural design avoids equipment redundancy caused by traditional multi-station layouts, significantly reducing the probability of secondary contamination caused by manual contact. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of the battery cover appearance inspection device provided in this embodiment of the utility model.

[0018] Figure 2 for Figure 1 A schematic diagram of the structure of the battery cover appearance inspection device when inspecting the appearance of the other end face of the battery cover.

[0019] Figure 3 A cross-sectional view of the limiting mechanism provided in an embodiment of this utility model.

[0020] Figure 4 A bottom view of the limiting mechanism provided in an embodiment of this utility model.

[0021] Figure 5 An exploded cross-sectional view of the limiting mechanism and button battery cover provided in the embodiments of this utility model.

[0022] Figure 6 A top view of the second limiting ring provided in an embodiment of this utility model.

[0023] Figure 7 A partial sectional view of the limiting mechanism, locking assembly, and battery cover provided in an embodiment of this utility model.

[0024] Figure 8 An installation view of the limiting mechanism, locking assembly, and battery cover provided for an embodiment of this utility model.

[0025] Figure 9 A cross-sectional view of a limiting mechanism provided in another embodiment of the present invention.

[0026] Figure 10 A cross-sectional view of a limiting mechanism provided in another embodiment of the present invention.

[0027] The following are the labeling elements in the figure:

[0028] 100—Detection mechanism; 200—Limiting mechanism; 300—Rotation mechanism

[0029] 400—Limiting cavity; 900—Button battery cover; 210—First limiting ring

[0030] 220—Second limiting ring; 211—First receiving groove; 221—Second receiving groove

[0031] 500—Locking assembly; 510—Elastic element; 520—Moving block

[0032] 530—Fixed block 212—Modible groove 213—Leaving groove

[0033] 521—Stop part; 522—Guide part; 540—Magnetic component

[0034] 550—First magnetic component; 560—Second magnetic component. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The following description is based on the accompanying drawings. Figures 1-10The described embodiments are exemplary and intended to explain embodiments of the present invention, and should not be construed as limiting the present invention.

[0036] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0039] In one embodiment of this utility model, such as Figures 1-8 As shown, a battery cover appearance inspection device is provided, including an inspection mechanism 100, a limiting mechanism 200, and a rotating mechanism 300. The inspection mechanism 100 is used to inspect the appearance of a button battery cover 900. The limiting mechanism 200 is provided with a limiting cavity 400 for clamping the button battery cover 900, and the limiting mechanism 200 is located below the monitoring end of the inspection mechanism 100. The output end of the rotating mechanism 300 is drivenly connected to the limiting mechanism 200. The limiting cavity 400 passes through the limiting mechanism 200, and the button battery cover 900 located in the limiting cavity 400 consists of two opposite end faces to be inspected, which are driven towards the inspection mechanism 100 in sequence by the rotating mechanism 300.

[0040] Through the coordinated design of the rotating mechanism 300 and the through-type limiting cavity 400, the button battery cover 900 can be autonomously flipped while being clamped, allowing the two opposite end faces to be inspected to be sequentially oriented to the inspection mechanism 100 within a single station. This effectively solves the shortcomings of traditional equipment that requires manual intervention or additional stations for multi-face inspection. The linkage mechanism between the rotating drive and the limiting clamping ensures the stability of the workpiece while eliminating the risk of cumulative errors caused by multiple positioning. This improves inspection efficiency and consistency, and the integrated structural design avoids equipment redundancy caused by traditional multi-station layouts, significantly reducing the probability of secondary contamination caused by manual contact.

[0041] like Figures 1-8 As shown, in another embodiment of this utility model, the limiting mechanism 200 includes a first limiting ring 210 and a second limiting ring 220. The limiting cavity 400 is formed between the first limiting ring 210 and the second limiting ring 220. The inner rings of the first limiting ring 210 and the second limiting ring 220 are concentrically arranged. The detection end of the detection mechanism 100 can pass through the inner rings of the first limiting ring 210 and the second limiting ring 220 to perform appearance inspection on the end face of the button battery cover 900 to be inspected. The two ends of the first limiting ring 210 are fixedly connected to the output end of the rotating mechanism 300. By concentrically stacking the first limiting ring 210 and the second limiting ring 220, the battery cover 900 is ensured to always be in a coaxial state during rotation. The detection mechanism 100 can directly penetrate the inner ring to perform unobstructed scanning of the two sides to be detected. Compared with the unidirectional detection mode of traditional fixed fixtures, this design can achieve dual-sided switching detection without disassembling or adjusting the detection equipment, solving the problem of limited detection surface caused by light path obstruction in traditional devices.

[0042] like Figures 1-8 As shown, in another embodiment of this utility model, the bottom of the first limiting ring 210 is provided with a first receiving groove 211 for accommodating the edge of the button battery cover 900, and the top of the second limiting ring 220 is provided with a second receiving groove 221 for accommodating the edge of the button battery cover 900. After the first limiting ring 210 and the second limiting ring 220 are stacked, the first receiving groove 211 and the second receiving groove 221 merge to form the limiting cavity 400. The first receiving groove 211 and the second receiving groove 221 are respectively provided along the inner edge of the first limiting ring 210 and the second limiting ring 220. The nested structure of the double receiving grooves achieves bidirectional limiting by precisely covering the edge of the battery cover 900. When the rotating mechanism 300 is driven, it effectively prevents the workpiece from shifting due to centrifugal force or inertia. Compared with the traditional single-sided clamping method, it significantly improves the clamping reliability during the flipping process and avoids the problem of missed detection or false detection caused by workpiece displacement in traditional detection.

[0043] like Figures 1-8As shown, in another embodiment of this utility model, a locking component 500 is provided at the opening of the first receiving groove 211. The locking component 500 is used to lock the second limiting ring 220 within the first receiving groove 211. The introduction of the locking component 500 enables rapid positioning and fixing of the second limiting ring 220 and the first limiting ring 210, avoiding concentricity deviation caused by assembly gaps in traditional split-type limiting structures. This ensures that the two limiting rings maintain a tight fit even during high-speed rotation, solving the problem of inconsistent detection reference surfaces caused by loose components in traditional flipping mechanisms.

[0044] like Figures 1-8 As shown, in another embodiment of this utility model, the locking assembly 500 includes an elastic element 510, a movable block 520, and a fixed block 530. The fixed block 530 is fixedly disposed on the side wall of the second limiting ring 220. The side wall of the first receiving groove 211 is provided with a movable groove 212. The end of the movable block 520 is slidably connected in the movable groove 212. The two ends of the elastic element 510 abut against the inner wall of the movable groove 212 and the side wall of the movable block 520, respectively. The elastic element 510 can drive the end of the movable block 520 away from the elastic element 510 to move outside the movable groove 212 and into the first receiving groove 211. A gap is provided between the end of the movable block 520 and the top wall of the first receiving groove 211 for accommodating the second limiting ring 220. After being driven by the elastic element 510, the starting end of the movable block 520 can stop on the moving path of the fixed block 530. The linkage design of the elastic element 510 and the movable block 520 provides adaptive locking force. When the second limit ring 220 is inserted into the first receiving groove 211, the locking is automatically triggered, and the assembly can be completed without manual operation. Compared with the traditional bolt fastening method, the tooling change time is greatly shortened. At the same time, the elastic buffer mechanism reduces the impact of mechanical impact on the detection accuracy and overcomes the risk of component wear or deformation caused by traditional rigid locking.

[0045] like Figures 1-8As shown, in another embodiment of this utility model, the bottom of the first limiting ring 210 is provided with a relief groove 213, the movable block 520 includes a stop part 521 and a guide part 522, one end of the guide part 522 is located in the movable groove 212, and the other end of the guide part 522 extends out of the first limiting ring 210 from the relief groove 213. The guide part 522 is slidably connected to the groove wall of the relief groove 213. The stop part 521 is provided at one end of the guide part 522, and the elastic member 510 abuts against the end of the guide part 522 opposite to the stop part 521. The sliding engagement between the guide section 522 and the clearance groove 213 provides a stable movement trajectory for the movable block 520, ensuring that the stop section 521 always accurately intercepts the fixed block 530 along the preset path. Compared with the traditional non-guided locking structure, this design effectively prevents the movable block 520 from jamming due to uneven force, improves the repeatability of the locking action, and solves the problem of workpiece falling off caused by locking failure in traditional flipping mechanisms.

[0046] like Figures 1-8 As shown, in another embodiment of this utility model, the stop portion 521 is provided with a conical structure, and the end face of the stop portion 521 facing away from the first receiving groove 211 is inclined. The inclined end face of the conical stop portion 521 can guide the fixing block 530 to slide into the locking gap when the second limiting ring 220 is inserted, and automatically reset and lock under the action of the elastic element 510, realizing the quick assembly effect of "insertion and locking". Compared with the defects of traditional planar stop structures that require precise alignment, this design significantly reduces the assembly difficulty and improves the equipment maintenance efficiency.

[0047] In another embodiment of this utility model, the fixing block 530 is formed in a ring shape and covers the outer wall of the second limiting ring 220. The outer diameter of the fixing block 530 is equal to the groove diameter of the first receiving groove 211. The size matching design of the ring-shaped fixing block 530 and the first receiving groove 211 forms a tight radial constraint, which suppresses the radial movement of the second limiting ring 220 during rotation. Compared with the traditional point-type fixing block 530, this structure enhances the overall rigidity, avoids component deformation caused by local stress concentration under high-frequency rotation conditions, and ensures long-term stability.

[0048] like Figure 9As shown, in another embodiment of this utility model, the locking assembly 500 includes a fixing block 530 and a magnetic component 540. The fixing block 530 is arranged in a ring shape and covers the outer wall of the second limiting ring 220. The outer diameter of the fixing block 530 is smaller than the groove diameter of the first receiving groove 211, and the outer diameter of the fixing block 530 is larger than the inner diameter of the inner ring of the first limiting ring 210. The magnetic component 540 is embedded in the top wall of the first receiving groove 211. The fixing block 530 is made of a magnetically conductive metal material. The magnetic adsorption locking method achieves rapid fixing and releasing of the second limiting ring 220 through non-contact magnetic force, avoiding the cumbersome process of manual operation required by traditional mechanical locking. At the same time, the uniform distribution of magnetic force reduces the impact of local stress on the positioning accuracy of the workpiece, making it particularly suitable for high-cleanliness testing environments and reducing the risk of particulate contamination that may be introduced by traditional contact locking.

[0049] like Figure 10 As shown, in another embodiment of this utility model, the locking assembly 500 includes a fixing block 530, a first magnetic element 550, and a second magnetic element 560. The fixing block 530 forms a ring structure and covers the outer wall of the second limiting ring 220. The outer diameter of the fixing block 530 is smaller than the groove diameter of the first receiving groove 211, and the outer diameter of the fixing block 530 is larger than the inner diameter of the inner ring of the first limiting ring 210. The first magnetic element 550 is embedded in the top wall of the first receiving groove 211, and the second magnetic element 560 is disposed on the end face of the fixing block 530 facing the first receiving groove 211. The ends of the first magnetic element 550 and the second magnetic element 560 that are opposite to each other are arranged with opposite magnetic poles. The opposite magnetic pole pairing design of the dual magnetic component 540 enhances the magnetic attraction effect. While ensuring locking strength, it allows for rapid separation of like magnetic poles by flipping the second limiting ring 220. Compared with a single magnetic adsorption solution, it is easier to disassemble and replace the tooling, solving the problem of difficult disassembly of traditional magnetic locks. At the same time, the magnetic alignment characteristics can assist in the precise positioning of the second limiting ring 220, improving assembly efficiency.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery cover appearance inspection device, characterized in that, include: The testing organization is used to inspect the appearance of the button battery cover; A limiting mechanism is provided with a limiting cavity for clamping the button battery cover, and the limiting mechanism is located below the monitoring end of the detection mechanism; A rotating mechanism, the output end of which is drivenly connected to the limiting mechanism; The limiting cavity extends through the limiting mechanism, and the two end faces of the button battery cover located in the limiting cavity are opposite to each other and are driven towards the detection mechanism in sequence by the rotation mechanism.

2. The battery cover appearance inspection device according to claim 1, characterized in that: The limiting mechanism includes a first limiting ring and a second limiting ring. The limiting cavity is formed between the first limiting ring and the second limiting ring. The inner rings of the first limiting ring and the second limiting ring are concentrically arranged. The detection end of the detection mechanism can pass through the inner rings of the first limiting ring and the second limiting ring to perform visual inspection on the end face of the button battery cover to be inspected. The two ends of the first limiting ring are fixedly connected to the output end of the rotating mechanism.

3. The battery cover appearance inspection device according to claim 2, characterized in that: The bottom of the first limiting ring is provided with a first receiving groove for accommodating the edge of the button battery cover, and the top of the second limiting ring is provided with a second receiving groove for accommodating the edge of the button battery cover. After the first limiting ring and the second limiting ring are stacked, the first receiving groove and the second receiving groove are combined to form the limiting cavity. The first receiving groove and the second receiving groove are respectively provided along the inner edge of the first limiting ring and the second limiting ring.

4. The battery cover appearance inspection device according to claim 3, characterized in that: A locking component is provided at the opening of the first receiving groove, and the locking component is used to lock the second limiting ring in the first receiving groove.

5. The battery cover appearance inspection device according to claim 4, characterized in that: The locking assembly includes an elastic element, a movable block, and a fixed block. The fixed block is fixedly disposed on the side wall of the second limiting ring. The side wall of the first receiving groove is provided with a movable groove. The end of the movable block is slidably connected in the movable groove. The two ends of the elastic element abut against the inner wall of the movable groove and the side wall of the movable block, respectively. The elastic element can drive the end of the movable block away from the elastic element to move outside the movable groove and into the first receiving groove. A gap is provided between the end of the movable block and the top wall of the first receiving groove for accommodating the second limiting ring. After being driven by the elastic element, the starting end of the movable block can stop in the moving path of the fixed block.

6. The battery cover appearance inspection device according to claim 5, characterized in that: The bottom of the first limiting ring is provided with a clearance groove. The movable block includes a stop part and a guide part. One end of the guide part is located in the movable groove, and the other end of the guide part extends out of the first limiting ring from the clearance groove. The guide part is slidably connected to the groove wall of the clearance groove. The stop part is provided at one end of the guide part, and the elastic member abuts against the end of the guide part opposite to the stop part.

7. The battery cover appearance inspection device according to claim 6, characterized in that: The stop portion is provided with a conical structure, and the end face of the stop portion facing away from the first receiving groove is designed to be inclined.

8. The battery cover appearance inspection device according to claim 5, characterized in that: The fixing block is formed in a ring shape and covers the outer wall of the second limiting ring. The outer diameter of the fixing block is equal to the groove diameter of the first receiving groove.

9. The battery cover appearance inspection device according to claim 4, characterized in that: The locking assembly includes a fixing block and a magnetic component. The fixing block is formed in a ring shape and covers the outer wall of the second limiting ring. The outer diameter of the fixing block is smaller than the groove diameter of the first receiving groove, and the outer diameter of the fixing block is larger than the inner diameter of the inner ring of the first limiting ring. The magnetic component is embedded in the top wall of the first receiving groove. The fixing block is made of magnetically conductive metal material.

10. The battery cover appearance inspection device according to claim 4, characterized in that: The locking assembly includes a fixing block, a first magnetic component, and a second magnetic component. The fixing block is formed in a ring structure and covers the outer wall of the second limiting ring. The outer diameter of the fixing block is smaller than the groove diameter of the first receiving groove, and the outer diameter of the fixing block is larger than the inner diameter of the inner ring of the first limiting ring. The first magnetic component is embedded in the top wall of the first receiving groove, and the second magnetic component is disposed on the end face of the fixing block facing the first receiving groove. The ends of the first magnetic component and the second magnetic component that are opposite to each other are arranged with opposite magnetic poles.

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