Plastic component elastic sheet in-place detection method and in-place detection device

Abstract

The invention relates to an in-place detection method and an in-place detection device for an elastic sheet of a plastic component. The detection method comprises the following steps: placing the plastic component in a placement position; the pressing assembly is driven to fix the plastic assembly located at the placing position; driving the detection assembly to abut against the plastic assembly and carry out conduction detection; obtaining a detection result and analyzing and judging whether the elastic sheet is installed in place; if it is judged that the elastic pieces of the plastic assembly are installed in place, ultrasonic welding is conducted on the plastic assembly; wherein the step of obtaining the detection result and analyzing and judging whether the elastic piece is installed in place comprises the steps that if the first elastic needle and the matched elastic needle are not conducted, the second elastic needle and the matched elastic needle are conducted and the third elastic needle and the matched elastic needle are not conducted, it is judged that the elastic piece is installed in place, and otherwise, it is judged that the elastic piece is not installed in place. Detection is carried out before ultrasonic welding, the detection procedure is fused in the assembly technological process, the working efficiency is improved, the recovery rate of defective products is increased, and the rate of the defective products is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of conduction testing, and in particular to a method and a device for detecting whether a spring piece of a plastic component is in position. Background Art

[0002] At present, most of the methods for inspecting the installation of plastic products and springs are manual visual inspection, and the finished product inspection can only be carried out after the plastic product and spring assembly process is completed. Defective products cannot be inspected during the assembly production process, which separates the assembly and inspection processes. Not only is the process cumbersome and the work efficiency low, but the disassembly after assembly will cause scratches on the plastic products or deformation of the springs, making it difficult to rework or recycle the defective finished products detected at this time. For example, in the embodiment of the present invention, ultrasonic welding is required after the components are assembled. Therefore, the recovery rate of defective products detected after the finished products are assembled is 0%, resulting in the direct scrapping of the defective products. Summary of the invention

[0003] The first purpose of the present invention is to provide a method for detecting whether the springs are in place of a plastic component, which aims to solve the technical problems that the assembly and detection processes of existing plastic components are separated during detection, resulting in cumbersome processes, low work efficiency, and difficulty in reworking or recycling defective finished products.

[0004] In order to solve the above technical problems, a method for detecting the presence of a spring in a plastic component is provided, comprising: placing the plastic component in a placement position; Driving the pressing component to fix the plastic component located at the placement position; The driving detection component abuts against the plastic component and performs a conduction detection; Obtain the test results and analyze to determine whether the spring clip is installed in place; If it is determined that the spring piece of the plastic component is installed in place, ultrasonic welding is performed on the plastic component; Among them, the obtaining of the detection results and analyzing and judging whether the spring piece is installed in place includes: if there is no conduction between the first spring pin and the matching spring pin, conduction between the second spring pin and the matching spring pin, and no conduction between the third spring pin and the matching spring pin, then it is judged that the spring piece is installed in place; otherwise, it is judged that the spring piece is not installed in place.

[0005] Furthermore, the situation of determining that the spring piece is not installed in place includes: If the first spring pin and the matching spring pin are connected, the second spring pin and the matching spring pin are connected, and the third spring pin and the matching spring pin are not connected, it is determined that the spring piece is not installed in place; or, If the first spring pin and the matching spring pin are not connected, the second spring pin and the matching spring pin are connected, and the third spring pin and the matching spring pin are connected, it is determined that the spring piece is not installed in place; or, If the first spring pin and the matching spring pin are connected, the second spring pin and the matching spring pin are connected, and the third spring pin and the matching spring pin are connected, it is determined that the spring sheet is not installed in place.

[0006] Further, the driving the pressing component to fix the plastic component at the placement position includes: the second driving member drives the pressing block and the matching elastic pin to move along the second direction, so that the pressing block abuts against the plastic component, and the matching elastic pin abuts against the elastic sheet.

[0007] Furthermore, the driving detection component abuts against the plastic component and performs a conduction detection, including: a first driving member drives the first spring pin, the second spring pin and the third spring pin to move along a first direction, so that the first spring pin abuts against the first detection position, the second spring pin abuts against the second detection position, and the third spring pin abuts against the third detection position to perform a conduction detection.

[0008] Furthermore, if it is determined that the spring piece of the plastic component is not installed in place, the plastic component is subjected to defective product treatment.

[0009] The second object of the present invention is to provide a position detection device, which is used to implement the above-mentioned spring piece position detection method of the plastic component, comprising: A frame having a placement position for placing the plastic component; The detection assembly includes a first driving member, a first elastic needle, a second elastic needle and a third elastic needle, wherein the first driving member is mounted on the frame, and the first elastic needle, the second elastic needle and the third elastic needle are all connected to the first driving member; The pressing assembly comprises a second driving member and a matching spring pin, wherein the second driving member is mounted on the frame, and the matching spring pin is connected to the second driving member; A controller, electrically connected to the first spring needle, the second spring needle, the third spring needle and the matching spring needle respectively; The plastic component has a first detection position, a second detection position and a third detection position respectively matched with the first elastic needle, the second elastic needle and the third elastic needle.

[0010] Furthermore, the plastic component includes a plastic part and a spring sheet, the plastic part includes a mounting groove, and the spring sheet is at least partially assembled in the mounting groove.

[0011] Further, a left stopper and a right stopper are arranged outside the mounting groove, the first detection position is arranged on the left stopper, the third detection position is arranged on the right stopper, and the second detection position is arranged between the left stopper and the right stopper; When the spring sheet is installed in place, the spring sheet is characterized as being blocked by the left stopper at the first detection position, blocked by the right stopper at the third detection position, and exposed at the second detection position so as to enable contact with the second spring needle.

[0012] Furthermore, the left stopper and the right stopper are both made of insulating material.

[0013] Furthermore, the pressing assembly also includes a pressing block, the pressing block is connected to the second driving member, and the matching spring pin is installed on a side of the pressing block away from the second driving member.

[0014] Implementing the embodiments of the present invention will have the following beneficial effects: The method for detecting whether the spring pieces are in place of the plastic components in this embodiment first detects whether the spring pieces are in place before the plastic components are ultrasonically welded. On the one hand, the detection process is integrated into the assembly process flow, which is beneficial to improving work efficiency and simplifying the process. On the other hand, defective products detected before ultrasonic welding can be reassembled, which is beneficial to improving the recycling rate of plastic components and reducing the defective product rate, thereby avoiding the problem that defective products detected after ultrasonic welding cannot be recycled and can only be scrapped. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a flow chart of a method for detecting the presence of a spring piece of a plastic component according to an embodiment of the present invention; Figure 2 It is a structural schematic diagram of the arrival detection device according to an embodiment of the present invention; Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A; Figure 4 It is a structural schematic diagram of a plastic component according to an embodiment of the present invention; Figure 5 This is a control principle diagram of the arrival detection device according to an embodiment of the present invention.

[0017] Wherein: 100, in-position detection device; 110, frame; 111, placement position; 120, detection assembly; 121, first driving member; 122, first spring pin; 123, second spring pin; 124, third spring pin; 130, pressing assembly; 131, second driving member; 132, matching spring pin; 133, pressing block; 140, controller; 200, plastic component; 210, plastic part; 211, mounting groove; 212, left stopper; 213, right stopper; 214, first convex column; 215, second convex column; 220, spring piece; 230, first detection position; 240, second detection position; 250, third detection position. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0021] Please refer to Figure 1-Figure 5 The embodiment of the present invention provides a method for detecting whether a spring piece 220 of a plastic component 200 is in place, comprising: Placing the plastic component 200 at the placement position 111; The pressing component 130 is driven to fix the plastic component 200 located at the placement position 111 ; illustratively, the pressing component 130 presses down to fix the plastic component 200 to prevent the plastic component 200 from shaking when the detection component 120 is testing.

[0022] The driving detection component 120 is brought into contact with the plastic component 200 and conducts a conduction detection; Obtain the test results and analyze and determine whether the spring piece 220 is installed in place; If it is determined that the spring piece 220 of the plastic component 200 is installed in place, the plastic component 200 is ultrasonically welded; specifically, in this embodiment, the plastic component 200 includes a plastic part 210 and a spring piece 220, such as Figure 4 As shown, a first boss 214 and a second boss 215 are formed on the plastic part 210, and a positioning hole that cooperates with the first boss 214 and the second boss 215 is formed on the spring piece 220. When the plastic component 200 is ultrasonically welded, the first boss 214 and the second boss 215 are melted by high temperature, so that the spring piece 220 is completely fixed to the plastic part 210. At this time, the spring piece 220 cannot be removed from the plastic part 210. Therefore, if the ultrasonic welding is performed and then tested, the defective products detected at this time can only be scrapped and cannot be disassembled and assembled again. If the finished product is forcibly disassembled, it is not only time-consuming and labor-intensive, but also the plastic part 210 cannot be used again, and the spring piece 220 is also likely to be deformed and cannot be used again, resulting in a waste of resources.

[0023] Among them, obtaining the detection results and analyzing and determining whether the spring clip 220 is installed in place includes: if there is no conduction between the first spring pin 122 and the matching spring pin 132, there is conduction between the second spring pin 123 and the matching spring pin 132, and there is no conduction between the third spring pin 124 and the matching spring pin 132, then it is determined that the spring clip 220 is installed in place; otherwise, it is determined that the spring clip 220 is not installed in place.

[0024] Please refer to Figure 1 In the method for detecting whether the spring piece 220 of the plastic component 200 is in place, the spring piece 220 is first detected to determine whether it is in place before the plastic component 200 is ultrasonically welded. On the one hand, the detection process is integrated into the assembly process flow, which is beneficial to improving work efficiency and simplifying the process. On the other hand, defective products detected before ultrasonic welding can be assembled again, which is beneficial to improving the recycling rate of the plastic component 200 and reducing the defective product rate, thereby avoiding the problem that defective products detected after ultrasonic welding cannot be recycled and can only be scrapped.

[0025] Please refer to Figure 1 , Figure 3 and Figure 4 In a possible implementation manner, the situation where it is determined that the spring piece 220 is not installed in place includes: If the first spring pin 122 and the matching spring pin 132 are connected, the second spring pin 123 and the matching spring pin 132 are connected, and the third spring pin 124 and the matching spring pin 132 are not connected, it is determined that the spring piece 220 is not installed in place; or, If the first spring pin 122 and the matching spring pin 132 are not connected, the second spring pin 123 and the matching spring pin 132 are connected, and the third spring pin 124 and the matching spring pin 132 are connected, it is determined that the spring piece 220 is not installed in place; or, If the first spring pin 122 and the matching spring pin 132 are connected, the second spring pin 123 and the matching spring pin 132 are connected, and the third spring pin 124 and the matching spring pin 132 are connected, it is determined that the spring piece 220 is not installed in place. Exemplarily, based on the structure of the product (plastic component 200) of the present application, regardless of whether the spring piece 220 is installed in place, the second spring pin 123 and the matching spring pin 132 must be connected, and when it is installed in place, the first spring pin 122 and the second spring pin 123 will not be connected to the matching spring pin 132; if one or all of the first spring pin 122 and the second spring pin 123 are connected to the matching spring pin 132, it means that the spring piece 220 is not installed in place.

[0026] Please refer to Figure 1 , Figure 2 and Figure 3 In a possible implementation, driving the pressing component 130 to fix the plastic component 200 at the placement position 111 includes: the second driving member 131 drives the pressing block 133 and the matching spring pin 132 to move along the second direction, so that the pressing block 133 abuts the plastic component 210, and the matching spring pin 132 abuts the spring piece 220. Exemplarily, the pressing block 133 is rectangular, and the pressing block 133 has a pressing plane, which abuts against the plastic component 210 through the pressing plane. Before the conduction test is performed, the plastic component 200 is first fixed at the placement position 111, and the matching spring pin 132 abuts against the spring piece 220, so as to prepare for the subsequent conduction test. The second driving member 131 drives the pressing block 133 and the matching spring pin 132 to move downward in the vertical direction.

[0027] Please refer to Figure 1 , Figure 2 and Figure 3 In a possible implementation, driving the detection component 120 to abut against the plastic component 200 and perform a conduction test includes: the first driving member 121 drives the first elastic pin 122, the second elastic pin 123 and the third elastic pin 124 to move along the first direction, so that the first elastic pin 122 abuts against the first detection position 230, the second elastic pin 123 abuts against the second detection position 240, and the third elastic pin 124 abuts against the third detection position 250 to perform a conduction test. Exemplarily, the first direction is a horizontal direction, that is, the first direction and the second direction are vertically arranged. In addition, it should be noted that the first driving member 121 drives the first elastic pin 122, the second elastic pin 123 and the third elastic pin 124 to move simultaneously.

[0028] In a possible implementation, if it is determined that the spring piece 220 of the plastic component 200 is not installed in place, the plastic component 200 is subjected to a defective product handling item. Exemplarily, the defective product handling item includes an alarm prompt or defective product collection. In this embodiment, when it is detected that the spring piece 220 is not installed in place, the production equipment will automatically move the defective product to a specific location for manual reassembly, or manually split the defective product into the plastic part 210 and the spring piece 220, and then put them into the production equipment for reassembly, conduction test and ultrasonic welding.

[0029] Please refer to Figure 2 , Figure 3 and Figure 4The second object of the present invention is to provide an in-place detection device 100, which is used to implement the in-place detection method of the spring piece 220 of the plastic component 200 mentioned above, and includes a frame 110, a detection component 120, a pressing component 130 and a controller 140. The frame 110 has a placement position 111 for placing the plastic component 200. The detection component 120 includes a first driving member 121, a first elastic needle 122, a second elastic needle 123 and a third elastic needle 124. The first driving member 121 is installed on the frame 110, and the first elastic needle 122, the second elastic needle 123 and the third elastic needle 124 are all connected to the first driving member 121. The pressing component 130 includes a second driving member 131 and a matching elastic needle 132. The second driving member 131 is installed on the frame 110, and the matching elastic needle 132 is connected to the second driving member 131. The controller 140 is electrically connected to the first spring pin 122, the second spring pin 123, the third spring pin 124 and the matching spring pin 132, respectively. The plastic component 200 has a first detection position 230, a second detection position 240 and a third detection position 250 that are matched with the first spring pin 122, the second spring pin 123 and the third spring pin 124, respectively. Exemplarily, the first detection position 230, the second detection position 240 and the third detection position 250 are defined as positions that contact the first spring pin 122, the second spring pin 123 and the third spring pin 124, respectively, during the conduction test. The controller 140 is responsible for driving the first drive member 121 (such as a cylinder) and the second drive member 131 to achieve precise control of the spring pins and the pressing block 133. This includes controlling the movement of the spring pins so that they can correctly contact the detection positions on the plastic component 200, and controlling the pressing block 133 to ensure that the plastic component 200 remains stable during the detection process. The controller 140 receives the conduction signals from the first spring pin 122, the second spring pin 123, the third spring pin 124 and the matching spring pin 132, and determines whether the spring piece 220 is installed in place according to these signals. It evaluates the position and state of the spring piece 220 by detecting the electrical conduction of the contact point. According to the conduction information transmitted by the detection component 120, the controller 140 performs a logical analysis to determine whether the spring piece 220 of the plastic component 200 has been correctly assembled. If it is found that the spring piece 220 is not installed in place, the controller 140 will instruct the execution of the defective product handling matters.

[0030] Please refer to Figure 4 In a possible implementation, the plastic component 200 includes a plastic part 210 and a spring 220, the plastic part 210 includes a mounting groove 211, and the spring 220 is at least partially assembled in the mounting groove 211. Exemplarily, the mounting groove 211 is used to limit and fix the spring 220, that is, the mounting groove 211 is one of the fixing positions of the spring 220.

[0031] Please refer to Figure 3 and Figure 4In a possible implementation manner, a left stopper 212 and a right stopper 213 are provided on the outside of the installation slot 211, the first detection position 230 is provided on the left stopper 212, the third detection position 250 is provided on the right stopper 213, and the second detection position 240 is provided between the left stopper 212 and the right stopper 213; when the spring piece 220 is installed in place, the spring piece 220 is characterized as being blocked by the left stopper 212 at the first detection position 230, blocked by the right stopper 213 at the third detection position 250, and exposed at the second detection position 240 so that the second spring pin 123 can contact. Exemplarily, the left block 212 and the right block 213 are jointly enclosed to form the mounting groove 211. The above-mentioned installation in place refers to that the spring piece 220 is inserted into the mounting groove 211 and the inserted spring piece 220 is located on the inner side of the left block 212 and the right block 213, that is, the side close to the mounting groove 211. The above-mentioned not being installed in place refers to that the spring piece 220 is not inserted into the mounting groove 211, and at this time the spring piece 220 is located on the outer side of the left block 212 and the right block 213, that is, the side away from the mounting groove 211. It can be understood that the spring piece 220 at this time will cover the left block 212 and the right block 213. That is to say, when the spring piece 220 is installed in place, during the conduction test, the first spring pin 122 contacts the outer side of the left block 212, and the third spring pin 124 contacts the outer side of the right block 213. Figure 4 As shown, the spring clip 220 is located at the inner side of the installation slot 211 at this time, and the spring clip 220 has been installed in place. In the case where the spring clip 220 is not installed in place, the first spring pin 122 and the third spring pin 124 contact the spring clip 220 during the conduction test. Specifically, there may be three situations: only the spring clip 220 located at the first detection position 230 is blocked by the left block 212, or only the spring clip 220 located at the third detection position 250 is blocked by the right block 213, or the spring clip 220 located at the first detection position 230 is blocked by the left block 212, and the spring clip 220 located at the third detection position 250 is blocked by the right block 213. All three of the above situations are situations where the spring clip 220 is not installed in place. Figure 3 As shown, at this time, the position of the spring piece 220 is located outside the installation groove 211, that is, at this time, the spring piece 220 is not installed in place.

[0032] Please refer to Figure 3 and Figure 4The main function of the left block 212 and the right block 213 is to assist in determining whether the spring piece 220 of the plastic component 200 is installed in place. Specifically, they detect the position of the spring piece 220 by cooperating with the spring pin in the detection component 120. During the detection process of the plastic component 200, the left block 212 and the right block 213 are respectively arranged on the outside of the installation slot 211 to locate the position of the spring piece 220. When the spring piece 220 is installed in place, the spring piece 220 will be blocked by the left block 212 at the first detection position 230, and blocked by the right block 213 at the third detection position 250, and exposed at the second detection position 240 so that the second spring pin 123 can contact. Through this positioning method, it can be ensured that the spring piece 220 is in the correct position for conduction detection, thereby improving the accuracy and reliability of the detection.

[0033] For example, the main invention of the present application is to utilize the structural characteristics of the product itself, that is, when the spring piece 220 is correctly installed in the installation groove 211, the first detection position 230 is blocked by the left block 212, the third detection position 250 is blocked by the right block 213, and only the second detection position 240 is exposed. The conduction test is used to accurately determine the installation status of the spring piece 220. Compared with the use of a visual camera, the solution of the present application will not have the situation of misjudgment, which is conducive to improving the accuracy of detection and has a lower cost.

[0034] In a possible implementation, the left block 212 and the right block 213 are both made of insulating materials. For example, the conduction test scheme of the present application needs to achieve non-conduction when the spring pin contacts the left block 212 and the right block 213, and conduction when the spring pin spring piece 220 contacts, so as to judge the installation position of the spring piece 220, and determine whether the spring piece 220 is installed in place by a simple and direct method. In order to achieve this purpose, it is necessary to set the left block 212 and the right block 213 to be non-conductive.

[0035] Please refer to Figure 2 , Figure 3 and Figure 4 In a possible implementation, the pressing assembly 130 further includes a pressing block 133, which is connected to the second driving member 131, and is mounted on the side of the pressing block 133 away from the second driving member 131 with the spring pin 132. Exemplarily, the first driving member 121 and the second driving member 131 are both cylinders, which can provide precise stroke and speed control, which is essential to ensure the correct contact between the spring pin and the detection position and the stable fixation of the plastic component 200 by the pressing block 133. The cylinder has a fast response time and can be started and stopped quickly, which helps to improve the efficiency of the entire detection process. In addition, compared with other types of drivers, cylinders generally have lower initial investment costs and operating costs, making the entire in-place detection device 100 more economical and efficient.

[0036] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for detecting the presence of a spring in a plastic component, characterized in that: include: placing the plastic component in a placement position; Driving the pressing component to fix the plastic component located at the placement position; The driving detection component abuts against the plastic component and performs a conduction detection; Obtain the test results and analyze to determine whether the spring clip is installed in place; If it is determined that the spring piece of the plastic component is installed in place, ultrasonic welding is performed on the plastic component; Among them, the obtaining of the detection results and analyzing and judging whether the spring piece is installed in place includes: if there is no conduction between the first spring pin and the matching spring pin, conduction between the second spring pin and the matching spring pin, and no conduction between the third spring pin and the matching spring pin, then it is judged that the spring piece is installed in place; otherwise, it is judged that the spring piece is not installed in place.

2. The method for detecting the presence of a spring in a plastic component according to claim 1, characterized in that: The situation where it is determined that the spring piece is not installed in place includes: If the first spring pin and the matching spring pin are connected, the second spring pin and the matching spring pin are connected, and the third spring pin and the matching spring pin are not connected, it is determined that the spring piece is not installed in place; or, If the first spring pin and the matching spring pin are not connected, the second spring pin and the matching spring pin are connected, and the third spring pin and the matching spring pin are connected, it is determined that the spring piece is not installed in place; or, If the first spring pin and the matching spring pin are connected, the second spring pin and the matching spring pin are connected, and the third spring pin and the matching spring pin are connected, it is determined that the spring sheet is not installed in place.

3. The method for detecting the presence of a spring in a plastic component according to claim 1, characterized in that: The driving of the pressing component to fix the plastic component at the placement position includes: a second driving member driving the pressing block and the matching elastic pin to move along the second direction, so that the pressing block abuts against the plastic component, and the matching elastic pin abuts against the elastic sheet.

4. The method for detecting the presence of a spring in a plastic component according to claim 3, characterized in that: The driving detection component abuts against the plastic component and performs a conduction detection, including: a first driving member drives the first elastic needle, the second elastic needle and the third elastic needle to move along the first direction, so that the first elastic needle abuts against the first detection position, the second elastic needle abuts against the second detection position, and the third elastic needle abuts against the third detection position to perform a conduction detection.

5. The method for detecting the presence of a spring in a plastic component according to claim 1, characterized in that: If it is determined that the spring piece of the plastic component is not installed in place, the plastic component will be treated as a defective product.

6. A position detection device, characterized in that: A method for detecting the presence of a spring in a plastic component according to any one of claims 1 to 5, comprising: A frame having a placement position for placing the plastic component; The detection assembly includes a first driving member, a first elastic needle, a second elastic needle and a third elastic needle, wherein the first driving member is mounted on the frame, and the first elastic needle, the second elastic needle and the third elastic needle are all connected to the first driving member; The pressing assembly comprises a second driving member and a matching spring pin, wherein the second driving member is mounted on the frame, and the matching spring pin is connected to the second driving member; A controller, electrically connected to the first spring needle, the second spring needle, the third spring needle and the matching spring needle respectively; The plastic component has a first detection position, a second detection position and a third detection position respectively matched with the first elastic needle, the second elastic needle and the third elastic needle.

7. The arrival detection device according to claim 6, characterized in that: The plastic assembly includes a plastic part and a spring sheet. The plastic part includes a mounting groove. The spring sheet is at least partially assembled in the mounting groove.

8. The in-place detection device according to claim 7, characterized in that: A left stopper and a right stopper are arranged outside the mounting groove, the first detection position is arranged on the left stopper, the third detection position is arranged on the right stopper, and the second detection position is arranged between the left stopper and the right stopper; When the spring sheet is installed in place, the spring sheet is characterized as being blocked by the left stopper at the first detection position, blocked by the right stopper at the third detection position, and exposed at the second detection position so as to enable contact with the second spring needle.

9. The in-place detection device according to claim 8, characterized in that: The left stopper and the right stopper are both made of insulating material.

10. The arrival detection device according to claim 6, characterized in that: The pressing assembly further includes a pressing block, which is connected to the second driving member, and the matching spring pin is installed on a side of the pressing block away from the second driving member.

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