Plastic part resistance detection device

Abstract

The utility model discloses a plastic part resistance detection device, which comprises an insulating base, a positioning block, a pressing mechanism and a resistance detector, a support and a circuit board are mounted on the insulating base, and a conductive spring is welded on the circuit board; the positioning block is fixed on the insulating base, a first conductive terminal is fixed on the positioning block, a positioning hole is formed in the positioning block, and the spring is positioned in the positioning hole and is electrically connected with the first conductive terminal; the pressing mechanism is installed on the support and comprises a conductive pressing block, a transmission shaft and a driving mechanism, a second conductive terminal is fixed to the conductive pressing block, and the transmission shaft is connected between the conductive pressing block and the driving mechanism in the vertical direction; the resistance detector is electrically connected to the first conductive terminal and the second conductive terminal and is used for detecting and displaying the resistance value of the plastic part. According to the utility model, the accuracy and reliability of plastic part detection can be ensured, the plastic part can be effectively prevented from being damaged by pressing, the operation is simple and convenient, and the detection efficiency is high.

Description

Technical Field

[0001] This utility model relates to the technical field of resistance measuring devices, and in particular to a resistance testing device for plastic parts. Background Technology

[0002] In modern industrial production, the application of plastic parts is becoming increasingly widespread, involving numerous fields such as electronics, electrical engineering, automobiles, home appliances, and medical devices. However, the resistance properties of plastic parts are crucial for their safety and reliability in specific applications. For example, in automotive electronic systems and certain special components, the resistance of relevant plastic parts must meet specific requirements to ensure electrical performance and safety. Furthermore, in some electrostatically sensitive industrial environments, such as electronics manufacturing, chemical processing, and pharmaceuticals, relevant plastic parts need to possess appropriate resistance values ​​to prevent accidents or product damage caused by electrostatic discharge. Therefore, the resistance value of such plastic parts needs to be tested after injection molding.

[0003] In the past, the resistance of plastic parts was typically tested manually using a multimeter. The operator held the multimeter's two test leads and clamped them directly to both ends of the plastic part to display its resistance value. This traditional method suffers from poor reliability in contact between the test leads and the plastic part, and is susceptible to interference from human error and external factors, affecting the accuracy and stability of the results. This makes it difficult to effectively distinguish between products with acceptable resistance performance and those that fail. Furthermore, this method is inconvenient to operate, resulting in low testing efficiency and failing to meet the rapid testing requirements of large-scale production, thus increasing production cycles and costs. Therefore, it is necessary to improve the existing technology to overcome its shortcomings. Utility Model Content

[0004] The problem to be solved by this utility model is to provide a plastic part resistance detection device to overcome the shortcomings of existing plastic part detection devices, such as poor accuracy and stability, inconvenient operation and low detection efficiency.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a plastic part resistance detection device, comprising:

[0006] An insulating base, on the top of which a bracket distributed in a vertical direction and a circuit board distributed in a horizontal direction are fixedly mounted, and a spring is welded to the top of the circuit board, the spring being made of a conductive metal material;

[0007] A positioning block is fixed to the top of the insulating base. A first conductive terminal is fixed on the positioning block, and a positioning hole for placing a plastic part is provided on the positioning block along the vertical direction. The spring is located in the positioning hole and is electrically connected to one end of the first conductive terminal.

[0008] A pressing mechanism is mounted on the bracket and includes a voltage-conducting block, a drive shaft, and a drive mechanism. The voltage-conducting block is positioned directly above the positioning hole and has a second conductive terminal fixed on it. The drive shaft is vertically connected between the voltage-conducting block and the drive mechanism. The drive mechanism is used to drive the voltage-conducting block to move vertically downward via the drive shaft to press the plastic part onto the spring.

[0009] A resistance tester, electrically connected to the first conductive terminal and the second conductive terminal, is used to detect and display the resistance value of the plastic part.

[0010] As a further improvement of this utility model, an insulating block is fixed to the lower end of the transmission shaft, and the voltage-conducting block is fixed to the bottom of the insulating block.

[0011] As a further improvement of this utility model, the driving mechanism includes a mounting plate, a handle, and a crank arm. The mounting plate is fixed on the bracket. One end of the handle is rotatably mounted on the mounting plate via a pin. The two ends of the crank arm are respectively hinged to one end of the handle and the upper end of the transmission shaft. When the handle rotates around the pin, it can drive the transmission shaft to move up and down via the crank arm.

[0012] As a further improvement of this utility model, the bottom of the mounting plate is provided with a folded edge, and a guide sleeve is installed on the folded edge, and the transmission shaft is slidably fitted inside the guide sleeve.

[0013] As a further improvement of this utility model, the driving mechanism includes a cylinder, which is fixed on the bracket and connected to the transmission shaft. The cylinder is used to drive the transmission shaft to make up-down linear motion.

[0014] As a further improvement of this utility model, the positioning block is provided with a first insertion hole and a first screw hole that is vertically connected to the first insertion hole. The first conductive terminal is inserted into the first insertion hole, and a first bolt is installed in the first screw hole, and the first bolt abuts against the first conductive terminal.

[0015] As a further improvement of this utility model, the conductive block is provided with a second socket and a second screw hole that is vertically connected to the second socket. The second conductive terminal is inserted into the second socket, and a second bolt is installed in the second screw hole, and the second bolt abuts against the second conductive terminal.

[0016] As a further improvement of this utility model, the resistance tester is a multimeter.

[0017] As a further improvement of this utility model, the insulating base, the bracket, the positioning block and the insulating block are all made of bakelite.

[0018] The beneficial effects of this utility model are as follows: This utility model provides a plastic part resistance testing device. A driving mechanism presses down a conductive block, which, in conjunction with a spring, tests the resistance of the plastic part. The spring flexibly supports the plastic part, ensuring reliable contact between the conductive block, the spring, and the plastic part, guaranteeing accurate test results and effectively distinguishing between qualified and unqualified products. It also prevents pressure damage to the plastic part, ensuring product quality. Furthermore, the plastic part resistance testing device is easy to operate, requiring no highly skilled professional operators, reducing labor training costs. It has high testing efficiency, effectively shortening testing time and meeting the rapid testing needs of large-scale production, thereby improving production efficiency and reducing production costs. In addition, since the user does not touch the plastic part during testing, and other related components are made of insulating materials, interference from human factors and external factors is avoided, improving the reliability of the test results. Attached Figure Description

[0019] Figure 1 This is a perspective view of the plastic part resistance detection device of this utility model;

[0020] Figure 2 This is a perspective view of the insulating base and its circuit board, spring and positioning block in this utility model;

[0021] Figure 3 This is a perspective view of the bracket and the pressing mechanism on it in this utility model;

[0022] Figure 4 This is a perspective view of the circuit board, spring, first conductive terminal, and plastic part in this utility model.

[0023] Referring to the accompanying drawings, the following explanations are provided:

[0024] 1. Insulating base; 2. Bracket; 3. Circuit board; 4. Spring; 5. Positioning block; 501. Positioning hole; 502. First insertion hole; 6. First conductive terminal; 7. Conductive block; 701. Second insertion hole; 8. Drive shaft; 9. Second conductive terminal; 10. Plastic part; 11. Resistance detector; 12. Insulating block; 13. Mounting plate; 131. Folded edge; 14. Handle; 15. Crank arm; 16. Guide bushing; 17. First bolt; 18. Second bolt. Detailed Implementation

[0025] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Example 1

[0027] See Figures 1 to 4 This utility model provides a plastic part resistance testing device, including: an insulating base 1, a positioning block 5, a pressing mechanism and a resistance tester 11.

[0028] The insulating base 1 has a bracket 2 that is distributed vertically and a circuit board 3 that is distributed horizontally fixedly installed on its top. A spring 4 is welded to the top of the circuit board 3. The spring 4 is made of a conductive metal material, such as nickel-plated carbon wire, phosphor bronze, brass, stainless steel, etc.

[0029] In this embodiment, the circuit board 3 is fastened to the top of the insulating base 1 with screws, and the circuit board 3 is provided with solder pads. The lower end of the spring 4 is soldered to the solder pads of the circuit board 3, thereby fixing the spring 4 and ensuring the stability and reliability of the subsequent resistance detection of the plastic part 10. Moreover, this fixing method of the spring 4 is easy to implement.

[0030] Furthermore, the positioning block 5 is fixed to the top of the insulating base 1 and pressed onto the circuit board 3. The positioning block 5 has positioning holes 501 extending vertically through its upper and lower ends, used to place the plastic part 10 to be tested. The spring 4 is located inside the positioning hole 501, and the length of the spring 4 is less than the depth of the positioning hole 501, with the top of the spring 4 positioned in the middle of the positioning hole 501. During testing, the plastic part 10 is placed inside the positioning hole 501 and supported by the spring 4. A first conductive terminal 6 is fixed to the positioning block 5, and the lower end of the spring 4 is electrically connected to one end of the first conductive terminal 6, for example, by welding.

[0031] Furthermore, the pressing mechanism is mounted on the bracket 2. The pressing mechanism includes a voltage-conducting block 7, a drive shaft 8, and a drive mechanism. The voltage-conducting block 7 is located directly above the positioning hole 501, and a second conductive terminal 9 is fixed on the voltage-conducting block 7. The drive shaft 8 is vertically connected between the voltage-conducting block 7 and the drive mechanism. The drive mechanism is used to drive the voltage-conducting block 7 to move vertically downward through the drive shaft 8 to press the plastic part 10 onto the spring 4.

[0032] In this invention, a resistance detector 11 is arranged on one side of an insulating base 1. The resistance detector 11 is electrically connected to a first conductive terminal 6 and a second conductive terminal 9, and is used to detect and display the resistance value of the plastic part 10. Specifically, two wires with clamps can be connected to the resistance detector 11, and the clamps of the two wires are respectively clamped to the first conductive terminal 6 and the second conductive terminal 9 to achieve electrical connection.

[0033] The detection process of this utility model's plastic part resistance detection device is as follows:

[0034] The plastic part 10 to be tested is manually inserted into the positioning hole 501 on the positioning block 5. At this time, the bottom of the plastic part 10 is supported by the spring 4, and the top protrudes above the positioning block 5. Then, the drive mechanism is operated to press down the voltage conductive block 7 through the transmission shaft 8, so that the voltage conductive block 7 is pressed against the top of the plastic part 10. As the voltage conductive block 7 moves further downward, the spring 4 is compressed until the voltage conductive block 7 drops to the specified height. At this time, the resistance detector 11 forms a circuit with the voltage conductive block 7, the plastic part 10 and the spring 4 through the first conductive terminal 6 and the second conductive terminal 9. The resistance detector 11 displays the resistance value of the plastic part 10 for the tester to read and judge whether it is qualified.

[0035] This utility model's plastic part resistance testing device uses a driving mechanism to press down the conductive block 7, which, in conjunction with a spring 4, detects the resistance of the plastic part 10. The spring 4 flexibly supports the plastic part 10, ensuring reliable contact between the conductive block 7, the spring 4, and the plastic part 10, guaranteeing accurate test results and effectively distinguishing between qualified and unqualified products. It also prevents pressure damage to the plastic part 10, ensuring product quality. Furthermore, the device is easy to operate, requiring no highly skilled professional operators, reducing labor training costs. It boasts high testing efficiency, effectively shortening testing time and meeting the rapid testing needs of large-scale production, thereby improving production efficiency and reducing production costs. In addition, since the plastic part 10 is not touched by human hands during testing, and other related components are made of insulating materials, interference from human factors and external elements is avoided, improving the reliability of the test results.

[0036] In this invention, an insulating block 12 is fixed to the lower end of the drive shaft 8, and a voltage-conducting block 7 is fixed to the bottom of the insulating block 12 by screws.

[0037] Preferably, the insulating base 1, bracket 2, positioning block 5 and insulating block 12 are all made of bakelite, which has good insulation properties, avoids affecting the accuracy of the test results of the plastic parts 10, and is easy to process and has a relatively low cost.

[0038] See Figure 2 The positioning block 5 is provided with a first insertion hole 502 and a first screw hole that is vertically connected to the first insertion hole 502. The first conductive terminal 6 is inserted into the first insertion hole 502. A first bolt 17 is installed in the first screw hole and abuts against the first conductive terminal 6, thereby fixing the first conductive terminal 6.

[0039] See Figure 3The voltage-conducting block 7 is provided with a second insertion hole 701 and a second screw hole that is vertically connected to the second insertion hole 701. The second conductive terminal 9 is inserted into the second insertion hole 701. A second bolt 18 is installed in the second screw hole and abuts against the second conductive terminal 9, thereby fixing the second conductive terminal 9 and ensuring a reliable electrical connection between the second conductive terminal 9 and the voltage-conducting block 7.

[0040] In this embodiment, the conductive block 7 is made of copper.

[0041] Continue reading Figure 3 In this embodiment, the driving mechanism includes a mounting plate 13, a handle 14, and a crank arm 15. The mounting plate 13 is fixed on the bracket 2. One end of the handle 14 is rotatably mounted on the mounting plate 13 via a pin. The two ends of the crank arm 15 are respectively hinged to one end of the handle 14 and the upper end of the transmission shaft 8. When the handle 14 is manually turned around the pin, the handle 14 can drive the transmission shaft 8 to move up and down via the crank arm 15, thereby driving the conductive block 7 to manually press down on the plastic part 10. In addition, a stop pin is fixed to one end of the handle 14. During the pressing process, the stop pin and the crank arm 15 form a stop to limit the movement stroke of the conductive block 7.

[0042] The mounting plate 13 has a folded edge 131 at the bottom, and a guide sleeve 16 is installed on the folded edge 131. The drive shaft 8 is slidably fitted inside the guide sleeve 16, and the guide sleeve 16 guides the drive shaft 8 to improve the stability of the drive shaft 8 moving up and down.

[0043] In this invention, the resistance tester 11 uses a multimeter, which meets the resistance testing requirements while reducing testing costs.

[0044] Example 2

[0045] The difference between this embodiment and embodiment one is that the driving mechanism in this embodiment is a cylinder, such as a slide cylinder. The cylinder is fixed on the bracket 2 and connected to the transmission shaft 8. The cylinder is used to drive the transmission shaft 8 to make up-down linear motion, thereby driving the conductive block 7 to automatically press down on the plastic part 10.

[0046] Therefore, this utility model's plastic part resistance testing device uses a driving mechanism to press down the conductive block 7, which, in conjunction with the spring 4, detects the resistance of the plastic part 10. The spring 4 flexibly supports the plastic part 10, ensuring reliable contact between the conductive block 7, the spring 4, and the plastic part 10, guaranteeing accurate test results and effectively distinguishing between qualified and unqualified products. It also prevents pressure damage to the plastic part 10, ensuring product quality. Furthermore, the device is easy to operate, requiring no highly skilled professional operators, reducing labor training costs. It boasts high testing efficiency, effectively shortening testing time and meeting the rapid testing needs of large-scale production, thereby improving production efficiency and reducing production costs. In addition, since the plastic part 10 is not touched by human hands during testing, and other related components are made of insulating materials, interference from human factors and external elements is avoided, improving the reliability of the test results.

[0047] Many specific details have been set forth in the above description to provide a full understanding of this utility model. However, the above description is only a preferred embodiment of this utility model, and this utility model can be implemented in many other ways different from those described herein. Therefore, this utility model is not limited to the specific embodiments disclosed above. Furthermore, any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the methods and techniques disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, shall still fall within the protection scope of the technical solution of this utility model.

Claims

1. A resistance testing device for plastic parts, characterized in that, include: An insulating base (1) is fixedly mounted on the top of the insulating base (1) with a bracket (2) distributed in the vertical direction and a circuit board (3) distributed in the horizontal direction, and a spring (4) is welded to the top of the circuit board (3), the spring (4) being made of conductive metal material. Positioning block (5), the positioning block (5) is fixed on the top of the insulating base (1), the positioning block (5) is fixed with a first conductive terminal (6), and the positioning block (5) is provided with a positioning hole (501) for placing a plastic part (10) along the vertical direction. The spring (4) is located in the positioning hole (501) and is electrically connected to one end of the first conductive terminal (6). The pressing mechanism is mounted on the bracket (2) and includes a voltage-conducting block (7), a transmission shaft (8) and a driving mechanism. The voltage-conducting block (7) is located directly above the positioning hole (501) and a second conductive terminal (9) is fixed on the voltage-conducting block (7). The transmission shaft (8) is connected vertically between the voltage-conducting block (7) and the driving mechanism. The driving mechanism is used to drive the voltage-conducting block (7) to move vertically downward through the transmission shaft (8) so as to press the plastic part (10) onto the spring (4). A resistance detector (11) is electrically connected to the first conductive terminal (6) and the second conductive terminal (9) for detecting and displaying the resistance value of the plastic part (10).

2. The plastic part resistance detection device according to claim 1, characterized in that: An insulating block (12) is fixed to the lower end of the drive shaft (8), and the voltage-conducting block (7) is fixed to the bottom of the insulating block (12).

3. The resistance detection device for plastic parts according to claim 1, characterized in that: The drive mechanism includes a mounting plate (13), a handle (14), and a crank arm (15). The mounting plate (13) is fixed on the bracket (2). One end of the handle (14) is rotatably mounted on the mounting plate (13) via a pin. The two ends of the crank arm (15) are respectively hinged to one end of the handle (14) and the upper end of the transmission shaft (8). When the handle (14) rotates around the pin, it can drive the transmission shaft (8) to move up and down through the crank arm (15).

4. The resistance detection device for plastic parts according to claim 3, characterized in that: The bottom of the mounting plate (13) is provided with a folded edge (131), and a guide sleeve (16) is installed on the folded edge (131). The transmission shaft (8) is slidably fitted inside the guide sleeve (16).

5. The plastic part resistance detection device according to claim 1, characterized in that: The driving mechanism includes a cylinder, which is fixed on the bracket (2) and connected to the transmission shaft (8). The cylinder is used to drive the transmission shaft (8) to make up-down linear motion.

6. The resistance detection device for plastic parts according to claim 1, characterized in that: The positioning block (5) is provided with a first insertion hole (502) and a first screw hole that is vertically connected to the first insertion hole (502). The first conductive terminal (6) is inserted into the first insertion hole (502). A first bolt (17) is installed in the first screw hole, and the first bolt (17) abuts against the first conductive terminal (6).

7. The resistance detection device for plastic parts according to claim 1, characterized in that: The conductive block (7) is provided with a second socket (701) and a second screw hole that is vertically connected to the second socket (701). The second conductive terminal (9) is inserted into the second socket (701). A second bolt (18) is installed in the second screw hole and abuts against the second conductive terminal (9).

8. The resistance detection device for plastic parts according to claim 1, characterized in that: The resistance tester (11) is a multimeter.

9. The resistance detection device for plastic parts according to claim 2, characterized in that: The insulating base (1), the bracket (2), the positioning block (5) and the insulating block (12) are all made of bakelite.

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