Resistance detection device

Abstract

The utility model discloses a resistance detection device, which is especially suitable for packaging a miniature resistor, the resistance detection device comprises a base, a circuit board and a jig, the base is provided with a fixing structure for fixing the circuit board, the circuit board is provided with a test point, the jig comprises a pedestal and a pressing plate, and the pressing plate is provided with a pressing groove. The base is stacked on the circuit board and fixed on the base, the base is provided with a bearing area used for placing a resistor sample piece, the base is further provided with a through hole corresponding to the test point position in a penetrating mode, the pressing plate is movably arranged on the base and used for pressing the resistor sample piece so that the detection contact arranged on the resistor sample piece can be in contact connection with the test point position of the circuit board through the through hole, and detection of the resistor sample piece is achieved. According to the design, the accuracy of testing is improved, the device is suitable for packaging the miniature resistor, the design of the pressing plate is more stable and durable than that of a traditional spring needle, the maintenance cost is reduced, the operation is simple and convenient, and the detection efficiency and reliability of packaging the miniature resistor are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic device testing, in particular to a resistance detection device particularly suitable for miniature resistor packaging. Background Art

[0002] At present, in the field of resistor testing technology, manual jigs are usually used to test the resistance value of chip resistor packages. This type of test jig mainly uses spring pins to contact the test contacts of the resistor product to achieve resistance measurement. The jig is simple to manufacture and has low processing costs, and is widely favored by major resistor manufacturers. However, for miniature resistor packages, because the product package is small, the test contact area is also very small. The test using spring pins cannot guarantee the accurate contact between the spring pins and the test contacts, thus affecting the accuracy of the test results. If miniature spring pins are manufactured for the corresponding test contacts, the manufacturing cost is expensive, and it is very easy to damage, and the maintenance cost is high. Utility Model Content

[0003] The utility model aims to provide a resistance detection device which is particularly suitable for miniature resistor packaging, has high detection accuracy and is not prone to damage.

[0004] In order to solve the above technical problems, the utility model provides a resistance detection device, comprising:

[0005] A base, the base having a mounting side, the mounting side being provided with a fixing structure;

[0006] A circuit board is fixed to the mounting side by the fixing structure, and a test point is arranged on the circuit board; and

[0007] The jig includes a base and a pressing plate. The base is stacked on a side of the circuit board away from the installation side and is also fixed to the base. A bearing area is provided on the side of the base facing away from the circuit board. The bearing area is used to place a resistor sample. The base is penetrated with a through hole at the bearing area corresponding to the test point. The pressing plate is movably arranged relative to the base to have a first position away from the base and a second position pressed against the bearing area. When the pressing plate is at the second position, it is arranged to press the resistor sample so that the detection contact on the resistor sample contacts the test point through the through hole.

[0008] Optionally, the test point includes a plurality of pads, each of which is covered with copper foil.

[0009] Optionally, the circuit board is further provided with a plurality of wiring ports, each of which is used to connect a test device, and the plurality of wiring ports are electrically connected to the plurality of pads in a one-to-one correspondence via a circuit etched on the circuit board.

[0010] Optionally, the base, the circuit board and the pedestal are fixedly connected so that the test point is clamped between the pedestal and the pedestal, and the wiring port is located outside the area covered by the pedestal.

[0011] Optionally, one side of the pressure plate is hinged to the base to have a movable stroke for rotating between the first position and the second position.

[0012] Optionally, the base has two oppositely arranged end sides, one end side is hinged to the pressure plate, and the other end side is provided with a buckle, and the free end of the pressure plate that rotates relative to the base is provided with a slot, and the buckle cooperates with the slot so that the pressure plate is clamped and fixed relative to the base when it is in the second position.

[0013] Optionally, an elastic member is protrudingly provided on a side of the pressing plate facing the base, and the elastic member is used to press against the resistor sample when the pressing plate is located at the second position.

[0014] Optionally, a mounting plate is detachably fixed to a side of the pressing plate facing the base, and the elastic member is fixed to a side of the mounting plate facing the base.

[0015] Optionally, a mounting groove is provided on the side of the base facing the pressure plate, a bearing groove is provided at the bottom of the mounting groove, the bearing area is arranged at the bottom of the bearing groove, a plurality of through holes are penetrated at the bottom of the bearing groove corresponding to the bearing area, and the mounting groove is used to insert the mounting plate when the pressure plate is located at the second position, and to allow the elastic member to be accommodated in the bearing groove.

[0016] Optionally, the fixing structure includes a plurality of screw holes opened on the installation side, the circuit board is provided with a plurality of alignment holes corresponding to the plurality of screw holes, the base is provided with installation holes corresponding to the plurality of screw holes, and the base and the circuit board are fixed to the base by bolts that are respectively provided through the plurality of installation holes, the plurality of alignment holes and the plurality of screw holes in sequence in a one-to-one correspondence.

[0017] The technical solution provided by the utility model has the following advantages:

[0018] The resistance detection device provided by the utility model is particularly suitable for micro-resistance packaging (chip resistor packaging with a long side size less than 2mm). In the utility model, the problem that the traditional spring pin test method is difficult to apply to micro-resistance packaging detection is effectively solved through the coordinated design of the circuit board and the fixture. Specifically, the resistance detection device includes a base, a circuit board and a fixture, wherein the base is provided with a fixing structure to fix the circuit board, and the circuit board is provided with a test point. The fixture includes a base and a pressure plate, the base is stacked on the circuit board and fixed to the base, and is provided with a bearing area for placing the resistance sample, and the base is also provided with a through hole corresponding to the test point. The pressure plate can be movably arranged on the base, and is used to press the resistance sample so that the detection contact arranged on it contacts the test point of the circuit board through the through hole, so that the electrical signal related to the resistance detection is derived from the circuit board to the test equipment, and the detection of the resistance sample is realized. This design improves the accuracy of the test, is suitable for micro-resistance packaging, and the pressure plate design is more stable and durable than the traditional spring pin, reduces the maintenance cost, is easy to operate, and improves the detection efficiency and reliability of the micro-resistance packaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of a resistance detection device provided by the utility model, wherein the pressing piece is in a first position;

[0021] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0022] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure of the medium resistance detection device, wherein the pressing piece is in the second position;

[0023] Figure 4 for Figure 1 Top view of the circuit board.

[0024] Description of reference numerals:

[0025] 100-resistance detection device; 10-base; 11-installation side; 20-circuit board; 21-alignment hole; 22-soldering pad; 23-wiring port; 30-jig; 31-base; 310-bearing area; 311-mounting hole; 312-through hole; 313-mounting slot; 314-bearing slot; 32-pressing plate; 321-slot; 322-elastic member; 323-mounting plate; 40-buckle; 200-resistance sample. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0028] The utility model provides a resistor detection device 100 for detecting a micro resistor package. In this embodiment, the micro resistor package refers to a chip resistor package with a long side size less than 2 mm, such as 0603, 0402 chip resistor packages, etc.

[0029] See also Figures 1 to 4 In this embodiment, the resistance detection device 100 includes a base 10, a circuit board 20 and a fixture 30. The base 10 and the fixture 30 are both made of insulating materials. The base 10 has a mounting side 11. The mounting side 11 is provided with a fixing structure. The circuit board 20 is fixed to the mounting side 11 through the fixing structure. The fixing structure can specifically be a screw hole, so that the circuit board 20 is screwed to the base 10. The fixing structure can also be a clamping structure, an adhesive structure, etc., which will not be repeated here.

[0030] See also Figure 4 The circuit board 20 is provided with test points and a plurality of wiring ports 23, wherein the test points are used to reliably contact with the detection contacts on the resistor sample 200, and the specific structure thereof can be various, as long as it can be adapted to the detection contacts on the resistor sample 200. The plurality of wiring ports 23 are used to connect test equipment, such as a multimeter, an electrical tester, etc.

[0031] The fixture 30 includes a base 31 and a pressing plate 32. The base 31 is stacked on the side of the circuit board 20 away from the mounting side 11 and is also fixed to the base 10. The fixing method is not limited as long as it can effectively locate the relative position between the circuit boards 20. A bearing area 310 is provided on the side of the base 31 facing away from the circuit board 20. The bearing area 310 is used to place the resistor sample 200. The base 31 is provided with a through hole 312 corresponding to the test point at the bearing area 310, so that the detection contact on the resistor sample 200 can contact the test point on the circuit board 20 through the through hole 312.

[0032] The pressing plate 32 is movably arranged relative to the base 31, and its movable mode is not limited. For example, it can be detachably covered on the base 31, and can also be rotatably installed on the base 31. The pressing plate 32 has a first position away from the base 31 and a second position pressed against the bearing area 310. When the pressing plate 32 is in the second position, it is configured to press the resistor sample 200 so that the detection contact on the resistor sample 200 contacts the test point on the circuit board 20 through the through hole 312.

[0033] In this embodiment, the process of testing the resistor sample 200 is as follows: the resistor sample 200 is placed in the bearing area 310, so that its detection contact is aligned with its through hole 312, and the pressing plate 32 is operated to move from the first position to the second position, pressing the resistor sample 200, and the detection contact is in contact with the test point, so that the electrical signal related to the resistance detection is derived from the circuit board 20 to the test equipment, and the resistance sample 200 is tested. This design improves the accuracy of the test and is suitable for micro-resistance packaging. The design of the pressing plate 32 is more stable and durable than the traditional spring pin.

[0034] Based on the previous embodiment, please refer to Figure 4 The test points on the circuit board 20 include a plurality of pads 22, each of which is covered with copper foil, which enhances the conductivity and durability of the circuit board 20. The use of copper foil provides a more stable current transmission path, which helps to improve the accuracy and reliability of the test. Specifically, there are four pads 22, which are used for input current, output current, input voltage and output voltage respectively. There are also four wiring ports 23. The plurality of wiring ports 23 are electrically connected to the plurality of pads 22 in a one-to-one correspondence through the circuit etched on the circuit board 20, and each wiring port 23 is used to connect the test equipment. In this way, an efficient connection between the resistor sample 200 and the test equipment is achieved. This design simplifies the access process of the test equipment, and enables the test equipment to more accurately obtain the current, voltage and other related parameters of the resistor sample 200, thereby ensuring the test accuracy and improving the efficiency of the test process.

[0035] Furthermore, the base 10, the circuit board 20 and the base 31 are fixedly connected so that the test point is sandwiched between the base 31 and the base 10, and the wiring port 23 is located outside the area covered by the base 31. In this way, the stability of the test point and the easy accessibility of the wiring port 23 are ensured, which facilitates the replacement of the connected test equipment, so that the test results of different test equipment can be compared.

[0036] Please continue reading Figures 1 to 3 Optionally, one side of the pressing plate 32 is hinged to the base 31 to have a movable stroke for rotation between the first position and the second position. In this embodiment, one side of the pressing plate 32 is hinged to the base 31, allowing the pressing plate 32 to rotate between the first position and the second position. This provides a simple and reliable connection between the pressing plate 32 and the base 31, avoids the problem that the pressing plate 32 is too small and easy to lose, and provides a flexible operation method, so that the user can adjust the position of the pressing plate 32 as needed.

[0037] Furthermore, the base 31 has two oppositely arranged ends, one of which is hinged to the pressing plate 32, and the other end is provided with a buckle 40, and a slot 321 is provided at the free end of the pressing plate 32 that rotates relative to the base 31, and the buckle 40 cooperates with the slot 321, so that the pressing plate 32 is fixed relative to the base 31 when it is in the second position. In this way, the stability of the position of the pressing plate 32 during the test is ensured in a simple and reliable manner, and there is no need to tighten the pressing plate 32 separately, and the pressing plate 32 and the base 31 can be automatically buckled when the pressing plate 32 rotates to the second position, which is easy to operate.

[0038] In a preferred embodiment, an elastic member 322 is protruded from one side of the pressing plate 32 facing the base 31. The elastic member 322 may be made of a material with certain elasticity and insulation, such as silicone or rubber, and is used to press against the resistor sample 200 when the pressing plate 32 is located at the second position. In this embodiment, the use of the elastic member 322 provides necessary pressure, ensures good contact between the resistor sample 200 and the test point, and provides a buffer when the resistor sample 200 is pressed, reducing the probability of damage to the resistor sample 200.

[0039] Preferably, the side of the pressing plate 32 facing the base 31 is detachably fixed with a mounting plate 323, and the side of the mounting plate 323 facing the base 31 is fixed with an elastic member 322. Specifically, the pressing plate 32 can be fixed to the mounting plate 323 by a detachable connection method such as screw connection or clamping, and the elastic member 322 can be insert injection molded or bonded to the pressing plate 32. When the elastic member 322 needs to be replaced, the mounting plate 323 can be disassembled. Such a configuration makes the replacement and maintenance of the elastic member 322 more convenient, and the size and thickness of the elastic member 322 can be changed according to the needs of the resistor package to be detected, so as to achieve the best detection effect.

[0040] Furthermore, a mounting groove 313 is provided on one side of the base 31 facing the pressing plate 32, a bearing groove 314 is provided at the bottom of the mounting groove 313, and the bearing area 310 is arranged at the bottom of the bearing groove 314. A plurality of through holes 312 are provided at the bottom of the bearing groove 314 corresponding to the bearing area 310, and the mounting groove 313 is used to insert the mounting plate 323 when the pressing plate 32 is in the second position, and to accommodate the elastic member 322 in the bearing groove 314. This design enables the mounting plate 323 to be inserted when the pressing plate 32 is in the second position, and the elastic member 322 is accommodated in the bearing groove 314, providing a limiting structure to avoid inaccurate detection results caused by the misalignment of the pressing plate 32 and the base 31.

[0041] On the basis of the above embodiment, the fixing structure includes a plurality of screw holes opened on the mounting side 11, the circuit board 20 is provided with a plurality of alignment holes 21 corresponding to the plurality of screw holes, the base 31 is provided with mounting holes 311 corresponding to the plurality of screw holes, and the base 31 and the circuit board 20 are fixed to the base 10 by bolts which are sequentially provided through the plurality of mounting holes 311, the plurality of alignment holes 21 and the plurality of screw holes in a one-to-one correspondence. In this embodiment, the base 31 and the circuit board 20 are fixed to the base 10 together by bolts through the cooperation of the screw holes, the alignment holes 21 and the mounting holes 311, providing a simple and reliable connection method and ensuring that the position of the base 31 and the position of the circuit board 20 are accurately aligned.

[0042] Obviously, the above described embodiments are only a part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, ordinary technicians in this field can make other different forms of changes or modifications without creative work, which should fall within the scope of protection of the utility model.

Claims

1. A resistance detection device, characterized in that: include: A base, the base having a mounting side, the mounting side being provided with a fixing structure; A circuit board is fixed to the mounting side by the fixing structure, and a test point is arranged on the circuit board; and The jig includes a base and a pressing plate. The base is stacked on a side of the circuit board away from the installation side and is also fixed to the base. A bearing area is provided on the side of the base facing away from the circuit board. The bearing area is used to place a resistor sample. The base is penetrated with a through hole at the bearing area corresponding to the test point. The pressing plate is movably arranged relative to the base to have a first position away from the base and a second position pressed against the bearing area. When the pressing plate is at the second position, it is arranged to press the resistor sample so that the detection contact on the resistor sample contacts the test point through the through hole.

2. The resistance detection device according to claim 1, characterized in that: The test point includes a plurality of pads, each of which is covered with copper foil.

3. The resistance detection device according to claim 2, characterized in that: The circuit board is also provided with a plurality of connection ports, each of which is used to connect a test device, and the plurality of connection ports are electrically connected to the plurality of pads in a one-to-one correspondence through a circuit etched on the circuit board.

4. The resistance detection device according to claim 3, characterized in that: The base, the circuit board and the pedestal are fixedly connected so that the test point is sandwiched between the base and the pedestal, and the wiring port is located outside the area covered by the pedestal.

5. The resistance detection device according to any one of claims 1 to 4, characterized in that: One side of the pressing plate is hinged to the base so as to have a movable stroke for rotating between the first position and the second position.

6. The resistance detection device according to claim 5, characterized in that: The base has two oppositely arranged end sides, one end side is hinged to the pressure plate, and the other end side is provided with a buckle, and the free end of the pressure plate rotating relative to the base is provided with a slot, and the buckle cooperates with the slot so that the pressure plate is clamped and fixed relative to the base when it is in the second position.

7. The resistance detection device according to claim 5, characterized in that: An elastic member is protrudingly provided on one side of the pressing plate facing the base, and the elastic member is used to press against the resistor sample when the pressing plate is located at the second position.

8. The resistance detection device according to claim 7, characterized in that: A mounting plate is detachably fixed to one side of the pressing plate facing the base, and the elastic member is fixed to one side of the mounting plate facing the base.

9. The resistance detection device according to claim 8, characterized in that: A mounting groove is provided on the side of the base facing the pressure plate, a bearing groove is provided at the bottom of the mounting groove, the bearing area is arranged at the bottom of the bearing groove, a plurality of through holes are penetrated at the bottom of the bearing groove corresponding to the bearing area, and the mounting groove is used to insert the mounting plate when the pressure plate is located at the second position, and to allow the elastic member to be accommodated in the bearing groove.

10. The resistance detection device according to any one of claims 1 to 4, characterized in that: The fixing structure includes a plurality of screw holes opened on the installation side, the circuit board is provided with a plurality of alignment holes corresponding to the plurality of screw holes, the base is provided with mounting holes corresponding to the plurality of screw holes, and the base and the circuit board are fixed to the base by bolts which are respectively provided through the plurality of mounting holes, the plurality of alignment holes and the plurality of screw holes in sequence.

Images