Convenient-to-operate chip resistor test fixture

Abstract

The utility model discloses a chip resistor testing jig convenient to operate, which relates to the technical field of chip resistor testing and comprises a working table, a movable plate is arranged on the upper surface of the working table in a sliding mode, and a plurality of mounting grooves are formed in the upper surface of the movable plate. Two rows of triangular guide blocks are arranged at the positions, located on the two sides of the multiple mounting grooves, of the upper surface of the movable plate, a pair of vertical plates is arranged at the positions, close to the edges of the two sides, of the upper surface of the workbench, and a through groove is formed in each vertical plate; when the movable plate drives the two rows of triangular guide blocks to move, the pair of test needles can move up and down in a reciprocating manner, so that the pair of test needles are pressed on the electrodes at the two ends of the chip resistor to be detected, a worker only needs to push the movable plate when detecting each chip resistor, the operation is convenient, and time and labor are saved.

Description

Technical Field

[0001] This utility model relates to the field of chip resistor testing technology, specifically a chip resistor testing fixture that is easy to operate. Background Technology

[0002] Surface mount resistors, also known as chip resistors, are a type of metal-glass uranium resistor. They are made by mixing metal powder and glass uranium powder and then screen printing the mixture onto a substrate. These resistors are small, lightweight, suitable for reflow soldering and wave soldering, and offer high mechanical strength and excellent high-frequency characteristics. Surface mount resistors are commonly used to limit current flow, thereby protecting other electronic components from excessive current.

[0003] By testing surface mount resistors, defective products can be identified and eliminated, avoiding circuit failures or performance degradation caused by resistor faults. For example, the utility model patent with announcement number CN213398720U discloses a test fixture for surface mount resistors, which fixes the surface mount resistor to be tested by a clamping plate and presses the surface mount resistor to be tested by a fixing block, and uses external testing equipment to test the surface mount resistor.

[0004] However, when testing each chip resistor, this utility model requires lifting the fixing block vertically upwards and inserting the first test probe into the slot. When there are many chip resistors, the operation is cumbersome, time-consuming and labor-intensive. Utility Model Content

[0005] To address the aforementioned shortcomings of existing technologies, this utility model provides a convenient surface mount resistor testing fixture. When the moving plate drives two rows of triangular guide blocks to move, it enables a pair of test probes to move back and forth up and down, thereby pressing the pair of test probes onto the two electrodes of the surface mount resistor to be tested. When testing each surface mount resistor, the operator only needs to push the moving plate, making the operation convenient, time-saving, and labor-saving.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a convenient surface mount resistor testing fixture, comprising a worktable, a movable plate slidably disposed on the upper surface of the worktable, multiple mounting slots formed on the upper surface of the movable plate, two rows of triangular guide blocks disposed on both sides of the mounting slots on the upper surface of the movable plate, a pair of upright plates disposed near the two side edges of the upper surface of the worktable, each upright plate having a through slot, a limit rod disposed on each upright plate within the through slot, a transmission plate vertically slidably disposed on the pair of limit rods, a pair of sliding rods disposed at the bottom of the transmission plate corresponding to the positions of the two rows of triangular guide blocks, the pair of sliding rods being slidably connected to the two rows of triangular guide blocks, and a pair of test probes electrically connected to external testing equipment disposed on the transmission plate. When the pair of sliding rods are located between two adjacent triangular guide blocks, the pair of test probes can be pressed onto the two electrodes of the surface mount resistor to be tested in the corresponding mounting slot for testing.

[0007] Preferably, each of the limiting rods is fitted with a spring, one end of which abuts against the upright plate and the other end abuts against the top of the transmission plate.

[0008] Preferably, a pair of limiting strips are provided on both sides of the workbench, a pair of upright plates are provided on the pair of limiting strips, and the two sides of the movable plate are slidably connected to the pair of limiting strips.

[0009] Preferably, a pair of side strips are provided on both sides of the upper surface of the movable plate, and two rows of triangular guide blocks are provided on the pair of side strips.

[0010] This invention provides a convenient surface mount resistance testing fixture with the following advantages:

[0011] 1. When the movable plate of this utility model moves two rows of triangular guide blocks, it enables a pair of test probes to move up and down repeatedly, thereby pressing the pair of test probes onto the two electrodes of the chip resistor to be tested. When testing each chip resistor, the operator only needs to push the movable plate, which is convenient, time-saving and labor-saving.

[0012] 2. The spring of this utility model can enhance the downward pressure effect of the test probe on the electrodes at both ends of the chip resistor, ensuring good contact between the test probe and the electrode of the chip resistor; a pair of limit strips are provided on both sides of the worktable to limit the moving plate and prevent the moving plate from deviating when it moves. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the internal structure of the present invention;

[0014] Figure 2 This is the right view of the present invention;

[0015] Figure 3 This is a schematic diagram of the internal structure of the present invention during testing.

[0016] In the diagram: 1. Workbench; 1-1. Limiting strip; 2. Moving plate; 2-1. Mounting slot; 3. Side strip; 4. Triangular guide block; 5. Vertical plate; 5-1. Through slot; 6. Limiting rod; 7. Transmission plate; 8. Slide rod; 9. Test probe; 10. Spring; 11. Surface mount resistor to be tested. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1-3 As shown, a convenient surface mount resistor testing fixture includes a workbench 1. A movable plate 2 is slidably mounted on the upper surface of the workbench 1. Multiple mounting slots 2-1 are formed on the upper surface of the movable plate 2. Two rows of triangular guide blocks 4 are arranged on both sides of the mounting slots 2-1 on the upper surface of the movable plate 2. A pair of upright plates 5 are positioned near the two side edges of the upper surface of the workbench 1. Each upright plate 5 has a through slot 5-1. A limit rod 6 is provided on each upright plate 5 within the through slot 5-1. A transmission plate 7 is vertically slidably mounted on the pair of limit rods 6. A pair of sliding rods 8 are positioned at the bottom of the transmission plate 7, corresponding to the positions of the two rows of triangular guide blocks 4. The pair of sliding rods 8 can slidably connect with the two rows of triangular guide blocks 4. The transmission plate 7 is provided with a pair of test pins 9 that are electrically connected to external testing equipment. When the pair of slide rods 8 are located between two adjacent triangular guide blocks 4, the pair of test pins 9 can press onto the two electrodes of the patch resistor 11 to be tested in the corresponding mounting groove 2-1 and perform testing. Each of the limiting rods 6 is fitted with a spring 10, one end of which abuts against the upright plate 5 and the other end abuts against the top of the transmission plate 7. A pair of limiting strips 1-1 are provided on both sides of the workbench 1, and a pair of upright plates 5 are provided on the pair of limiting strips 1-1. The two sides of the moving plate 2 are slidably connected to the pair of limiting strips 1-1. A pair of side strips 3 are provided on both sides of the upper surface of the moving plate 2, and two rows of triangular guide blocks 4 are provided on the pair of side strips 3.

[0019] Its detailed connection methods are well-known technologies in this field. The following mainly introduces the working principle and process, as follows:

[0020] According to the instruction manual Figure 1-3As can be seen, in use, multiple surface mount resistors 11 to be tested are placed in multiple mounting slots 2-1. The size of the mounting slots 2-1 matches the size of the surface mount resistors 11 to be tested, to prevent the surface mount resistors from moving horizontally within the mounting slots 2-1. The operator pushes the moving plate 2, causing it to move towards a pair of upright plates 5. When a pair of sliding rods 8 contact the inclined surfaces of the first pair of triangular guide blocks 4, the pair of sliding rods 8 will move vertically upward (each sliding rod 8 has chamfers on both sides of its bottom that match the angle of the inclined side of the triangular guide block 4). When the pair of sliding rods 8 move, they drive the connection... The transmission plate 7 moves vertically upward along a pair of limiting rods 6 (the transmission plate 7 has a pair of through holes through which the limiting rods 6 pass). When the transmission plate 7 moves vertically upward, it drives the connected pair of test needles 9 to move vertically upward. The operator continues to push the moving plate 2. When the pair of sliding rods 8 contact the other inclined surface of the first triangular guide block 4, under the weight of the transmission plate 7 and the pair of sliding rods 8, the pair of sliding rods 8 move vertically downward, thereby causing the transmission plate 7 and the pair of test needles 9 to move vertically downward. When the pair of sliding rods 8 are located between the first and second triangular guide blocks 4 (e.g., Figure 3 As shown, a pair of test pins 9 can press onto the two electrodes of the chip resistor 11 to be tested in the first mounting slot 2-1. The chip resistor is then tested by the testing equipment. After the test is completed, the moving plate 2 is pushed in the same way to complete the test of other chip resistors. When the moving plate 2 of this utility model moves the two rows of triangular guide blocks 4, it can make the pair of test pins 9 move up and down back and forth, so that the pair of test pins 9 press onto the two electrodes of the chip resistor 11 to be tested. When testing each chip resistor, the operator only needs to push the moving plate 2, which is convenient, time-saving and labor-saving.

[0021] One possible implementation is that the spring 10 can enhance the downward pressure effect of the pair of test probes 9 on the electrodes at both ends of the chip resistor, ensuring good contact between the test probes 9 and the electrodes of the chip resistor.

[0022] One possible implementation is that a pair of limit strips 1-1 are provided on both sides of the workbench 1 to limit the movement of the moving plate 2 and prevent the moving plate 2 from deviating when it moves.

[0023] One possible implementation is that a pair of side strips 3 are provided on both sides of the upper surface of the movable plate 2, and two rows of triangular guide blocks 4 are provided on the pair of side strips 3 to increase the height of the two rows of triangular guide blocks 4 so that the triangular guide blocks 4 can make good contact with the two sliding rods 8.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A convenient surface mount resistor testing fixture, comprising a worktable (1), characterized in that, A movable plate (2) is slidably mounted on the upper surface of the workbench (1). Multiple mounting slots (2-1) are provided on the upper surface of the movable plate (2). Two rows of triangular guide blocks (4) are provided on both sides of the mounting slots (2-1) on the upper surface of the movable plate (2). A pair of upright plates (5) are provided on the upper surface of the workbench (1) near the two side edges. Each upright plate (5) has a through groove (5-1). A limit rod (6) is provided on each upright plate (5) and within the through groove (5-1). The pair of limit rods (6) slide vertically. A transmission plate (7) is provided. At the bottom of the transmission plate (7) and at the position corresponding to the two rows of triangular guide blocks (4), a pair of slide rods (8) are provided. The pair of slide rods (8) can be slidably connected to the two rows of triangular guide blocks (4). A pair of test pins (9) electrically connected to external testing equipment are provided on the transmission plate (7). When the pair of slide rods (8) are located between two adjacent triangular guide blocks (4), the pair of test pins (9) can be pressed onto the two electrodes of the patch resistor (11) to be tested in the corresponding mounting groove (2-1) and tested.

2. The easy-to-operate surface mount resistance testing fixture according to claim 1, characterized in that, Each of the limiting rods (6) is fitted with a spring (10), one end of which abuts against the upright plate (5) and the other end abuts against the top of the transmission plate (7).

3. The easy-to-operate surface mount resistance testing fixture according to claim 1, characterized in that, The workbench (1) is provided with a pair of limiting strips (1-1) on both sides, and a pair of vertical plates (5) are provided on the pair of limiting strips (1-1). The two sides of the moving plate (2) are slidably connected to the pair of limiting strips (1-1).

4. The easy-to-operate surface mount resistance testing fixture according to claim 1, characterized in that, A pair of side strips (3) are provided on both sides of the upper surface of the movable plate (2), and two rows of triangular guide blocks (4) are provided on the pair of side strips (3).

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