Elastic ejector pin structure of circuit board

Abstract

The utility model relates to the technical field of circuit board testing, and provides an elastic ejector pin structure of a circuit board, which comprises a mounting plate, the mounting plate is fixedly connected onto the circuit board, a plurality of ejector pin assemblies are arranged on the mounting plate and are equidistantly distributed along the length direction of the mounting plate, and each ejector pin assembly comprises a pin sleeve. The needle sleeve is fixedly connected to the top of the mounting plate, the inner side of the needle sleeve is slidably connected with a guide block, the center position of the guide block is fixedly connected with an inserting part penetrating through the guide block, the top end of the inserting part is sleeved with an ejector pin, the bottom end of the inserting part is sleeved with an abutting part, the abutting part is fixedly connected to the bottom end of the inner side of the needle sleeve, and the bottom end of the abutting part is fixedly connected with a wire. And a positioning piece for keeping the needle sleeve and the guide block fixed is arranged on the outer side of the needle sleeve. According to the utility model, the burning process can be carried out at any stage on a production line by arranging the ejector pin, and the final assembly is not required to be finished, so that the test cost is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of circuit board testing technology, specifically to an elastic pin structure for a circuit board. Background Technology

[0002] During the production process, circuit boards need to be programmed. Programming is the process of transferring firmware, programs, or data from a computer or other storage device to the programmable memory (such as a microcontroller or memory chip) on the circuit board. The purpose is to enable the electronic devices on the circuit board to operate according to predetermined requirements and perform specific functions. After programming is completed, the circuit board needs to be tested.

[0003] Currently, in small-scale factory production processes, software programming usually needs to be performed after the equipment is fully assembled, and testing cannot be carried out before the circuit board is assembled. The main reason is that it is impossible to make a stable connection to the unassembled circuit board. In addition, if there are problems after testing the software-programmed equipment, the hardware needs to be modified, which requires disassembling and reassembling the equipment. The whole process will consume more time and resources, greatly increasing the testing cost. In view of this, this utility model proposes an elastic pin structure for circuit boards. Utility Model Content

[0004] This invention proposes an elastic pin structure for circuit boards, which solves the problem that existing technologies cannot stably connect unassembled circuit boards.

[0005] The technical solution of this utility model is as follows: A flexible ejector pin structure for a circuit board includes a mounting plate, which is fixedly connected to the circuit board. A plurality of ejector pin assemblies are provided on the mounting plate, and these assemblies are equidistantly distributed along the length of the mounting plate. Each ejector pin assembly includes a pin sleeve, which is fixedly connected to the top of the mounting plate. A guide block is slidably connected to the inner side of the pin sleeve. A insertion portion penetrating the guide block is fixedly connected to the center of the guide block. An ejector pin is sleeved at the top of the insertion portion, and an abutment portion is sleeved at the bottom of the insertion portion. The abutment portion is fixedly connected to the bottom of the inner side of the pin sleeve, and a wire is fixedly connected to the bottom of the abutment portion. A positioning element for fixing the pin sleeve to the guide block is provided on the outer side of the pin sleeve.

[0006] Preferably, the bottom end of the ejector pin has a slot, and the top end of the insertion part slides into the slot.

[0007] Preferably, a first spring is sleeved on the inner side of the needle sleeve, the top end of the first spring abuts against the guide block, and the bottom end of the first spring abuts against the bottom wall of the inner side of the needle sleeve.

[0008] Preferably, the positioning component includes a wire sleeve, which penetrates the side wall of the needle sleeve and is slidably connected to the side wall of the needle sleeve. Limiting plates are fixedly connected to both ends of the wire sleeve. A positioning rod penetrating the wire sleeve is slidably connected to the inner side of the wire sleeve. A positioning groove that slidably engages with the positioning rod is provided on the outer wall of the ejector pin. A pull block is fixedly connected to the end of the positioning rod away from the ejector pin.

[0009] Preferably, the positioning element further includes a second spring, which is sleeved on the positioning rod, with one end of the second spring abutting against the limiting plate and the other end of the second spring abutting against the pull block.

[0010] Preferably, an insulating sleeve is embedded inside the positioning groove, and the insulating sleeve slides in conjunction with the positioning rod.

[0011] Preferably, the side wall of the needle sleeve is provided with a sliding groove, and the lead sleeve is slidably connected to the inner wall of the sliding groove.

[0012] Preferably, the outer diameter of the limiting plate is larger than the outer diameter of the wire sleeve, and the inner diameter of the limiting plate is the same as the inner diameter of the wire sleeve.

[0013] The working principle and beneficial effects of this utility model are as follows:

[0014] 1. The ejector pin connects to the interface of the testing equipment, allowing the guide block to move downwards and the insertion part and the contact part to slide together, thus forming a path between the ejector pin and the wire. Under the action of the first spring, the ejector pin and the testing equipment make elastic contact, ensuring the continuity of the interface between the ejector pin and the testing equipment. This prevents the connection from being broken due to displacement or vibration, providing the testing equipment with a temporary and reliable connection method. This allows the programming process to be carried out at any stage of the production line without having to wait for final assembly, greatly reducing testing costs.

[0015] 2. When the ejector pin is deformed or damaged and needs to be replaced, pull the pull block outward to slide the positioning rod, causing the positioning rod to disengage from the positioning groove. This allows the ejector pin to be removed directly for replacement. When installing the ejector pin, mate the top of the ejector pin with the insertion part, and then mate the positioning rod with the positioning groove. This structure enables quick assembly and disassembly of the ejector pin, making it convenient for replacement. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the elastic ejector pin structure of a circuit board according to the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the ejector pin assembly of this utility model. Figure 1 ;

[0019] Figure 3 This is a schematic diagram of the structure of the ejector pin assembly of this utility model. Figure 2 ;

[0020] Figure 4 This is a schematic diagram of the structure of this utility model.

[0021] In the diagram: 1. Mounting plate; 2. Circuit board; 3. Ejector pin assembly; 31. Pin sleeve; 32. Guide block; 33. Insertion part; 34. Ejector pin; 35. Contact part; 36. Wire; 37. First spring; 38. Positioning component; 381. Wire sleeve; 382. Limiting plate; 383. Positioning rod; 384. Positioning groove; 385. Pull block; 386. Second spring; 387. Insulating sleeve; 39. Slide groove; 30. Slot. Detailed Implementation

[0022] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0023] like Figures 1-4 As shown, this embodiment proposes an elastic ejector pin structure for a circuit board, including a mounting plate 1, which is fixedly connected to a circuit board 2. A plurality of ejector pin assemblies 3 are disposed on the mounting plate 1, and the ejector pin assemblies 3 are equidistantly distributed along the length direction of the mounting plate 1. Each ejector pin assembly 3 includes a pin sleeve 31, which is fixedly connected to the top of the mounting plate 1. A guide block 32 is slidably connected to the inner side of the pin sleeve 31. An insertion portion 33, penetrating the guide block 32, is fixedly connected to the center of the guide block 32. An ejector pin 34 is sleeved on the top end of the insertion portion 33. The bottom end of the needle 34 is provided with a slot 30, the top end of the insertion part 33 is slidably engaged with the slot 30, the bottom end of the insertion part 33 is sleeved with an abutment part 35, the abutment part 35 is fixedly connected to the bottom end of the inner side of the needle sleeve 31, the bottom end of the abutment part 35 is fixedly connected with a wire 36, the inner side of the needle sleeve 31 is sleeved with a first spring 37, the top end of the first spring 37 abuts against the guide block 32, the bottom end of the first spring 37 abuts against the bottom wall of the inner side of the needle sleeve 31, and the outer side of the needle sleeve 31 is provided with a positioning member 38 for fixing the needle sleeve 31 and the guide block 32.

[0024] The ejector pin 34 is connected to the interface of the test equipment, causing the guide block 32 to move downward so that the insertion part 33 and the contact part 35 slide together, thereby forming a passage between the ejector pin 34 and the wire 36. Under the action of the first spring 37, the ejector pin 34 and the test equipment are in elastic contact, ensuring the continuity of the interface between the ejector pin 34 and the test equipment. This prevents the interface from being broken due to displacement or vibration, thus providing the test equipment with a temporary and reliable connection method. This allows the programming process to be carried out at any stage of the production line without having to wait until the final assembly is completed, greatly reducing the testing cost.

[0025] Furthermore, the positioning component 38 includes a wire sleeve 381, which penetrates the side wall of the needle sleeve 31 and is slidably connected to the side wall of the needle sleeve 31. A groove 39 is provided on the side wall of the needle sleeve 31, and the wire sleeve 381 is slidably connected to the inner wall of the groove 39. Limit plates 382 are fixedly connected to both ends of the wire sleeve 381. A positioning rod 383, penetrating the wire sleeve 381, is slidably connected to the inner side of the wire sleeve 381. A positioning groove 38, which slidably engages with the positioning rod 383, is provided on the outer wall of the ejector pin 34. 4. A pull block 385 is fixedly connected to the end of the positioning rod 383 away from the ejector pin 34. A second spring 386 is sleeved on the positioning rod 383. One end of the second spring 386 abuts against the limiting plate 382, ​​and the other end of the second spring 386 abuts against the pull block 385. An insulating sleeve 387 is embedded in the inner side of the positioning groove 384. The insulating sleeve 387 slides with the positioning rod 383. The outer diameter of the limiting plate 382 is larger than the outer diameter of the wire sleeve 381, and the inner diameter of the limiting plate 382 is the same as the inner diameter of the wire sleeve 381.

[0026] When the ejector pin 34 is deformed or damaged and needs to be replaced, the positioning rod 383 is slid outward by pulling the pull block 385, so that the positioning rod 383 is disengaged from the positioning groove 384, and the ejector pin 34 can be directly removed for replacement. When installing the ejector pin 34, the top of the ejector pin 34 is engaged with the insertion part 33, and then the positioning rod 383 is engaged with the positioning groove 384, thus realizing the installation of the ejector pin 34. This structure can realize the quick disassembly and assembly of the ejector pin 34, thereby facilitating the replacement of the ejector pin 34.

[0027] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A flexible ejector pin structure for a circuit board, comprising a mounting plate (1), said mounting plate (1) being fixedly connected to a circuit board (2), characterized in that, The mounting plate (1) is provided with a plurality of ejector pin assemblies (3), which are equidistantly distributed along the length of the mounting plate (1). Each ejector pin assembly (3) includes a needle sleeve (31), which is fixedly connected to the top of the mounting plate (1). A guide block (32) is slidably connected to the inner side of the needle sleeve (31). A plug-in part (33) is fixedly connected to the center of the guide block (32). An ejector pin (34) is sleeved on the top of the plug-in part (33). An abutment part (35) is sleeved on the bottom of the plug-in part (33). The abutment part (35) is fixedly connected to the bottom of the inner side of the needle sleeve (31). A wire (36) is fixedly connected to the bottom of the abutment part (35). A positioning member (38) for keeping the needle sleeve (31) and the guide block (32) fixedly connected is provided on the outer side of the needle sleeve (31).

2. The elastic ejector pin structure for a circuit board according to claim 1, characterized in that, The bottom end of the ejector pin (34) is provided with a slot (30), and the top end of the insertion part (33) slides in cooperation with the slot (30).

3. The elastic ejector pin structure for a circuit board according to claim 1, characterized in that, The needle sleeve (31) is fitted with a first spring (37) on its inner side. The top end of the first spring (37) abuts against the guide block (32), and the bottom end of the first spring (37) abuts against the bottom wall of the inner side of the needle sleeve (31).

4. The elastic ejector pin structure for a circuit board according to claim 3, characterized in that, The positioning component (38) includes a wire sleeve (381), which penetrates the side wall of the needle sleeve (31) and is slidably connected to the side wall of the needle sleeve (31). Limiting plates (382) are fixedly connected to both ends of the wire sleeve (381). A positioning rod (383) that penetrates the wire sleeve (381) is slidably connected to the inner side of the wire sleeve (381). A positioning groove (384) that slidably engages with the positioning rod (383) is provided on the outer wall of the ejector pin (34). A pull block (385) is fixedly connected to the end of the positioning rod (383) away from the ejector pin (34).

5. The elastic ejector pin structure for a circuit board according to claim 4, characterized in that, The positioning element (38) further includes a second spring (386), which is sleeved on the positioning rod (383). One end of the second spring (386) abuts against the limiting plate (382), and the other end of the second spring (386) abuts against the pull block (385).

6. The elastic ejector pin structure for a circuit board according to claim 5, characterized in that, An insulating sleeve (387) is embedded inside the positioning groove (384), and the insulating sleeve (387) slides in conjunction with the positioning rod (383).

7. The elastic ejector pin structure for a circuit board according to claim 5, characterized in that, The side wall of the needle sleeve (31) is provided with a sliding groove (39), and the wire sleeve (381) is slidably connected to the inner wall of the sliding groove (39).

8. The elastic ejector pin structure for a circuit board according to claim 5, characterized in that, The outer diameter of the limiting plate (382) is larger than the outer diameter of the wire sleeve (381), and the inner diameter of the limiting plate (382) is the same as the inner diameter of the wire sleeve (381).

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