Resistance measuring jig for alloy resistor

Abstract

The utility model discloses a resistance measuring jig for an alloy resistor, which comprises a rack, a horizontal bearing substrate is fixedly arranged on the surface of the rack, a plurality of concave profiling grooves are arranged on the surface of the bearing substrate in an array manner, a vertical mounting bracket is further arranged on the surface of the rack, and the mounting bracket is arranged on the bearing substrate. A vertical air cylinder arranged in the height direction of the mounting support is arranged on the mounting support, the output end of the vertical air cylinder is downwards connected with a horizontal middle plate, the lower portion of the middle plate is fixedly provided with a horizontal detection plate through at least four connecting columns, and the detection plate can move up and down relative to the bearing base plate. A plurality of measuring needles of which the bottom ends penetrate downwards are arranged on the detection plate; and the plurality of measuring needles penetrate upwards through the top wall of the detection plate. According to the utility model, the measuring needle on the detection plate is downwards and correspondingly contacted with the alloy resistor electrode in the profiling groove, so that the purpose of measuring resistance is realized, the measuring efficiency is high, and the device is suitable for mass alloy resistor test production work.

Description

Technical Field

[0001] The utility model relates to the technical field of alloy resistor detection, in particular to a resistance measuring tool for alloy resistors. Background Art

[0002] Alloy resistors are a type of resistance device, usually made of a variety of alloy materials. Compared with traditional carbon film resistors or metal film resistors, alloy resistors have higher precision and better stability. They can provide more accurate resistance values ​​and maintain relatively stable resistance values. Therefore, they are widely used in various electronic devices and systems.

[0003] In the related art, during the production process of alloy resistors, there may be some factors that affect the quality of the resistors, such as material differences, process deviations, equipment errors, etc. Therefore, after the alloy resistors are produced, it is necessary to sample the finished products and measure the resistance value to ensure that the resistance value of the alloy resistors meets the standards. For example, the Chinese patent CN214174507U of the prior art discloses a low-resistance detection fixture for chip resistors, including a base, a conductive layer, a fixed column, a pressing component and a movable component, a conductive layer is installed on one side of the top of the base, a limiting groove is embedded in the top of the conductive layer, a circuit board is installed in the limiting groove, a fixed column is installed on the top of the base on one side of the conductive layer, a top seat is installed on the top of one side of the fixed column, a baffle is installed on the top of the top seat, a pressing component is installed on the top of the baffle, and a movable component is installed through the pressing component.

[0004] In the prior art, after the alloy resistor manufacturing process is completed, the alloy resistors are manually placed on a resistor testing table for testing, defective products are screened out, and then subsequent packaging is performed. However, manual work is inefficient and is not suitable for large-scale production operations. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a resistance measuring jig for alloy resistors, which has a simple structure and is easy to use.

[0006] To achieve the above purpose, the present invention adopts the following contents:

[0007] A resistance measuring jig for alloy resistors comprises a frame, a horizontal supporting substrate fixedly provided on the surface of the frame, a plurality of concave contoured grooves arranged in an array on the surface of the supporting substrate, a vertical mounting bracket further provided on the surface of the frame, a vertical cylinder arranged along its height direction provided on the mounting bracket, an output end of the vertical cylinder downwardly connected to a horizontal intermediate plate, the side of the intermediate plate and the mounting bracket are connected via a slider rail assembly, a horizontal detection plate fixedly provided on the lower part of the intermediate plate via at least four connecting columns, the detection plate can be displaced up and down relative to the supporting substrate, a plurality of measuring needles with their bottom ends penetrating downward are provided on the detection plate, and a plurality of the measuring needles all penetrate upwardly through the top wall of the detection plate.

[0008] Furthermore, the frame is provided with a screw drive module along its length, with the screw drive module's nut seat upwardly connected to the mounting bracket. This low-cost, compact screw drive module enables horizontal displacement of the mounting bracket, facilitating placement of the alloy resistors within corresponding contoured grooves on the carrier substrate.

[0009] Furthermore, the frame is provided with a pair of parallel, spaced-apart guide rails running along its length. These rails are located outside the carrier base. Sliders are slidably mounted on these rails in a snap-fit ​​manner, and these slides are upwardly connected to the mounting bracket. This sliding engagement between the sliders and the rails improves the precision of the mounting bracket's horizontal movement, resulting in more stable motion.

[0010] Furthermore, a slot-shaped photoelectric sensor is located on one side of the bottom of the mounting bracket, and a corresponding contact piece for triggering the slot-shaped photoelectric sensor is located on one side of the frame surface. This contact piece and the slot-shaped photoelectric sensor work together to precisely position the mounting bracket, ensuring that the test board is positioned precisely above the carrier substrate, allowing the measuring needle to contact the alloy resistor electrode within the contoured groove and achieve resistance measurement.

[0011] To further illustrate, the upper end of the connecting post is movably inserted into the intermediate plate, and a stopper is provided at the head end of the connecting post. A compression spring is sleeved over the connecting post, and the ends of the compression spring are connected to the intermediate plate and the detection plate, respectively. Thus, when the measuring needle on the detection plate contacts the alloy resistor electrode, the detection plate continues to move downward, and the elastic action of the compression spring causes the measuring needle to form elastic contact with the alloy resistor electrode, thereby protecting the surface of the alloy resistor.

[0012] It is further explained that the size of the contoured groove is adapted to the maximum size of the alloy resistor, so that alloy resistors of different sizes can be placed in the contoured groove.

[0013] The beneficial effects of the utility model are as follows: by setting a contoured groove adapted to the alloy resistor, a batch of alloy resistors can be placed in the corresponding contoured groove on the surface of the carrier substrate, and then through the operation of the vertical cylinder, the measuring needle on the detection plate is downwardly contacted with the alloy resistor electrode in the contoured groove to achieve the purpose of resistance measurement, with high measurement efficiency, and is suitable for large-scale alloy resistor testing production work. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic structural diagram of a resistance measuring jig for an alloy resistor according to an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the carrier substrate according to an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the intermediate plate and the detection plate according to an embodiment of the present invention;

[0018] In the figures, the reference numerals are:

[0019] 1-frame, 2-carrying base plate, 3-mounting bracket, 4-vertical cylinder, 5-middle plate, 6-detection plate, 7-screw drive module, 8-guide rail, 11-groove photoelectric sensor, 12-contact piece, 21-profile groove, 51-slider rail assembly, 52-connecting column, 521-limit block, 522-compression spring, 61-measuring needle, 71-nut seat, 81-slider. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with preferred embodiments. Those skilled in the art should understand that the following specific description is illustrative rather than restrictive and should not limit the scope of protection of the present invention.

[0021] See also Figures 1 to 3As shown, in this embodiment, a resistance measuring fixture for an alloy resistor includes a horizontally arranged frame 1, a horizontal supporting substrate 2 is fixedly provided on the surface of the frame 1, a surface array of a plurality of concave profiling grooves 21 is provided on the surface of the supporting substrate 2, such as three rows and six columns of profiling grooves, a vertical mounting bracket 3 is further provided on the surface of the frame 1, a vertical cylinder 4 is provided on the mounting bracket 3 along its height direction, the output end of the vertical cylinder 4 is downwardly connected to a horizontal intermediate plate 5, the side of the intermediate plate 5 is connected to the mounting bracket 3 by a slider rail assembly 51, a horizontal detection plate 6 is fixedly provided at the lower part of the intermediate plate 5 by at least four connecting columns 52, the detection plate 6 can be displaced up and down relative to the supporting substrate 3, a plurality of measuring needles 61 with their bottom ends penetrating downward are provided on the detection plate 6, the plurality of measuring needles 61 all penetrate the top wall of the detection plate 6 upward, the bottom end surfaces of the plurality of measuring needles 61 are flush with each other, and the positions of the plurality of measuring needles 61 are arranged one-to-one corresponding to the positions of the profiling grooves 21.

[0022] By setting up contoured grooves that match the alloy resistors, batches of alloy resistors can be placed in the corresponding contoured grooves on the surface of the carrier substrate. Then, through the operation of the vertical cylinder, the measuring needle on the detection plate is downwardly directed to contact the alloy resistor electrode in the contoured groove to achieve the purpose of resistance measurement.

[0023] In this embodiment, a screw drive module 7 is provided along the length of the frame 1. A nut seat 71 of the screw drive module 7 is upwardly connected to the mounting bracket 3. This low-cost, compact screw drive module enables horizontal displacement of the mounting bracket, facilitating placement of the alloy resistors within the corresponding contoured grooves on the carrier substrate.

[0024] Furthermore, the surface of the frame 1 is provided with a pair of parallel and spaced guide rails 8 along its length. The guide rails 8 are located outside the support base 2. Sliders 81 are slidably mounted on the guide rails 8 in a snap-fit ​​manner. The slides 81 are upwardly connected to the mounting bracket 3. In this way, the sliding cooperation between the slides and the guide rails improves the precision of the horizontal movement of the mounting bracket, making the movement more stable.

[0025] Furthermore, a slot-shaped photoelectric sensor 11 is provided on one side of the bottom of the mounting bracket 3, and a contact piece 12 for triggering the slot-shaped photoelectric sensor 11 is provided on one side of the surface of the frame 1. Thus, the contact piece and the slot-shaped photoelectric sensor cooperate to achieve precise positioning of the mounting bracket, thereby determining whether the test board is exactly stopped above the carrier substrate, facilitating contact between the measuring needle and the alloy resistor electrode in the contoured groove and achieving resistance measurement.

[0026] In this embodiment, the upper end of the connecting post 52 is movably inserted into the intermediate plate 5, and a stopper 521 is provided at the head end of the connecting post 52. A compression spring 522 is sleeved on the connecting post 52, and the two ends of the compression spring 522 are respectively connected to the intermediate plate 5 and the detection plate 6. In this way, when the measuring needle on the detection plate contacts the alloy resistor electrode, the detection plate continues to move downward. Under the elastic action of the compression spring, the measuring needle will form an elastic contact with the alloy resistor electrode, thereby protecting the surface of the alloy resistor.

[0027] It should be noted that the size of the contoured groove 21 is adapted to the maximum size of the alloy resistor, so that alloy resistors of different sizes can all be placed in the contoured groove.

[0028] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A resistance measuring tool for alloy resistors, characterized in that: The machine comprises a frame, a horizontal supporting base plate fixedly provided on the surface of the frame, a plurality of concave contoured grooves arranged in an array on the surface of the supporting base plate, a vertical mounting bracket provided on the surface of the frame, a vertical cylinder arranged along its height direction provided on the mounting bracket, an output end of the vertical cylinder downwardly connected to a horizontal intermediate plate, the side of the intermediate plate and the mounting bracket are connected via a slider rail assembly, a horizontal detection plate is fixedly provided on the lower part of the intermediate plate via at least four connecting columns, the detection plate can be displaced up and down relative to the supporting base plate, a plurality of measuring needles with their bottom ends penetrating downward are provided on the detection plate, and a plurality of the measuring needles all penetrate upwardly through the top wall of the detection plate.

2. The resistance measuring jig for alloy resistors according to claim 1, characterized in that: A screw drive module is provided on the surface of the frame along its length direction, and a nut seat of the screw drive module is upwardly connected to the mounting bracket.

3. The resistance measuring jig for alloy resistors according to claim 2, characterized in that: The surface of the frame is provided with a pair of parallel and spaced guide rails along its length direction, the guide rails are located on the outside of the supporting base plate, and a slider is slidably mounted on the guide rails in a snap-fit ​​manner, and the slider is upwardly connected to the mounting bracket.

4. The resistance measuring jig for alloy resistors according to claim 3, characterized in that: A slot-type photoelectric sensor is provided on one side of the bottom of the mounting bracket, and a contact piece for triggering the slot-type photoelectric sensor is correspondingly provided on one side of the surface of the frame.

5. The resistance measuring jig for alloy resistors according to claim 1, characterized in that: The upper end of the connecting column is movably inserted into the middle plate, and a limit block is provided at the head end of the connecting column. A compression spring is sleeved on the connecting column, and both ends of the compression spring are respectively connected to the middle plate and the detection plate.

6. The resistance measuring jig for alloy resistors according to claim 1, characterized in that: The size of the contoured groove is adapted to the maximum specification size of the alloy resistor.

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