An electrical signal testing tool
Patent Information
- Application Number
- CN202522306869.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-10-31
AI Technical Summary
Traditional electric vehicle charging controller testing relies on manual operation, which leads to low efficiency, frequent misjudgments due to poor contact, easy product damage, and difficulty in quality control.
An electrical signal testing fixture was designed, which uses a drive cylinder, a positioning plate and a detection positioning block to achieve automatic and accurate positioning and pressing. Combined with a solenoid valve to control the air circuit, it ensures a stable connection of the probe.
It improves detection accuracy and efficiency, reduces reliance on operator skills and responsibility, avoids damage to interfaces and probes, broadens the scope of application, and extends probe life.
Smart Images
Figure CN224934038U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a testing fixture, specifically a testing fixture for electrical signals of various electrical controllers. Background Technology
[0002] Currently, the testing of traditional wired controllers (such as electric vehicle charging controllers) largely relies on manual operation. Operators must manually align and maintain contact between the controller's interface and the test probes, which is not only inefficient but also has the following drawbacks: inconsistent force and angle applied by the operator can easily lead to poor contact at the test points, resulting in misjudgments; frequent plugging and unplugging can damage the product interface and test probes; and it is highly dependent on the operator's skills and sense of responsibility, making product quality control difficult. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide an electrical signal testing fixture that can be accurately positioned and automatically pressed together.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: an electrical signal testing fixture, the structure of which includes: a base, an upwardly open mounting chamber on the base, a detection positioning support on the base covering the mounting chamber, a detection positioning chamber on the detection positioning support, a detection positioning block in the detection positioning chamber, an installation positioning structure between the detection positioning block and the detection positioning chamber, a detection positioning groove on the detection positioning block, a driving cylinder in the mounting chamber of the base, a cylinder mounting hole corresponding to the driving cylinder on the detection positioning support, the driving cylinder passing through the cylinder mounting hole on the detection positioning support, a needle seat connecting block on its piston rod, a needle seat mounting edge downwardly provided at the inner end of the needle seat connecting block (facing the detection positioning chamber), a needle seat on the needle seat mounting edge, and a row of probes at the inner end of the needle seat (away from the driving cylinder); a positioning plate corresponding to the needle seat is provided at the end of the detection positioning support near the driving cylinder.
[0005] As a preferred embodiment, in the aforementioned electrical signal testing fixture, the specific configuration of the installation and positioning structure is as follows: at least one positioning protrusion is provided on each of the two side walls of the positioning chamber of the detection positioning support, and the detection positioning block is provided with positioning grooves that correspond one-to-one with the positioning protrusions.
[0006] As a preferred embodiment, in the aforementioned electrical signal testing fixture, the positioning plate is specifically configured as follows: the detection positioning support has a positioning recess at one end near the drive cylinder that corresponds to the corresponding end of the positioning plate; at least two mounting threaded holes are provided on the bottom wall of the positioning recess; the positioning plate has mounting countersunk holes that correspond one-to-one with the mounting threaded holes on the bottom wall of the positioning recess; the detection positioning support has a limiting stop portion that extends above the positioning recess on the side of the positioning recess near the drive cylinder; the corresponding end of the positioning plate is placed in the positioning recess of the detection positioning support and rests against the limiting stop portion; a flat-head screw is selected, passes through the mounting countersunk hole on the positioning plate, and is tightened in the corresponding mounting threaded hole on the bottom wall of the positioning recess.
[0007] As a preferred embodiment, in the aforementioned electrical signal testing fixture, the installation chamber is further equipped with a solenoid valve for switching the air path, and the detection positioning support is equipped with an air path connection passage.
[0008] As a preferred embodiment, in the aforementioned electrical signal testing fixture, the air passage is connected to the cylinder mounting hole.
[0009] As a preferred embodiment, in the aforementioned electrical signal testing fixture, the needle holder and the needle holder mounting edge are specifically configured as follows: a needle holder mounting groove that mates with the needle holder is provided on the bottom surface of the needle holder mounting edge; a mounting threaded hole is provided on the bottom wall of the needle holder mounting groove; and mounting through holes that correspond one-to-one with the mounting threaded holes on the bottom wall of the needle holder mounting groove are provided on the corresponding ends of the needle holder. A screw is selected, passes through the mounting through hole on the needle holder, and is tightened in the corresponding mounting threaded hole on the bottom wall of the needle holder mounting groove.
[0010] The beneficial effects of this utility model are:
[0011] 1. This utility model achieves precise positioning and automatic pressing of the product to be tested by setting up a drive cylinder, a positioning plate, and a detection positioning block corresponding to the product being tested. This greatly improves the accuracy, efficiency, and reliability of the test, avoids the influence of subjective factors such as the operator's skill and sense of responsibility on the test results, and also avoids the problem of damage to the product interface and test probes caused by frequent plugging and unplugging.
[0012] 2. The present invention greatly facilitates the replacement of the detection positioning block by means of a specific installation and positioning structure between the detection positioning block and the detection positioning chamber. In this way, different products can be tested by changing the detection positioning block, which greatly expands the application scope of the electrical signal testing fixture described in the present invention.
[0013] 3. This utility model makes product installation more convenient by setting a guide slope at the product inlet of a pair of L-shaped positioning blocks, so that the opening between the pair of L-shaped positioning blocks gradually increases outward.
[0014] 4. This utility model reduces the height of the positioning plate by opening a positioning recess on the base that corresponds to the corresponding end of the positioning plate, and by opening a mounting countersunk hole on the positioning plate to hide the flat-head screw in the mounting countersunk hole, thereby reducing the space occupied by the positioning plate in terms of height, making the structure of the entire detection device more compact, shortening the probe stroke, which can not only improve detection efficiency, but also extend the service life of the probe.
[0015] 5. By placing the solenoid valve in the installation chamber and connecting it to the drive cylinder through the air passage, the structure of the entire testing fixture is made more compact.
[0016] 6. This utility model provides a needle seat mounting groove on the bottom surface of the needle seat mounting edge, and the corresponding end of the needle seat is locked in the needle seat mounting groove, making the connection between the needle seat and the needle seat connecting block more stable and reliable. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural schematic diagram of the electrical signal testing fixture described in this utility model.
[0018] Figure 2 This is an exploded structural diagram of the electrical signal testing fixture described in this utility model.
[0019] Figure 3 This is a schematic diagram of the test state of the electrical signal testing fixture described in this utility model.
[0020] Figure 4 This is a partial structural schematic diagram of the electrical signal testing fixture in the testing state described in this utility model.
[0021] Figures 1 to 4 The reference numerals in the attached drawings are as follows: 1. Base; 101. Mounting chamber; 2. Detection and positioning support; 201. Detection and positioning chamber; 202. Positioning recess; 2021. Mounting threaded hole; 211. Positioning protrusion; 23. Limiting stop; 24. Cylinder mounting through hole; 241. Air circuit connection passage; 3. Detection and positioning block; 301. Detection and positioning groove; 311. Positioning groove; 312. Positioning notch; 4. Drive cylinder; 40. Solenoid valve; 5. Positioning plate; 51. Mounting flat countersunk hole; 6. Probe; 60. Needle seat; 601. Mounting through hole; 63. Needle seat connecting block; 630. Needle seat mounting edge; 631. Needle seat mounting groove; 9. Controller; 90. Housing; 91. PCBA. Detailed Implementation
[0022] The following is in conjunction with the appendix Figures 1 to 4 This invention provides a detailed description of the specific implementation scheme of an electrical signal testing fixture.
[0023] like Figure 1 and Figure 2 As shown, the electrical signal testing fixture of this utility model includes: a base 1, an upwardly open mounting chamber 101 on the base 1, a detection positioning support 2 on the base 1 covering the mounting chamber 101, a detection positioning chamber 201 on the detection positioning support 2, a detection positioning block 3 in the detection positioning chamber 201, and an installation positioning structure between the detection positioning block 3 and the detection positioning chamber 201. The installation positioning structure is configured as follows: two positioning protrusions 211 are respectively provided on the two side walls of the positioning chamber 201 on the detection positioning support 2, and the detection positioning block 3 is provided with positioning grooves 311 or positioning grooves 311 corresponding to the positioning protrusions 211. Notch 312; The detection positioning block 3 is provided with a detection positioning groove 301 corresponding to the controller 9. The mounting chamber 101 of the base 1 is provided with a drive cylinder 4 and a solenoid valve 40 for switching the air path. The detection positioning support 2 is provided with a cylinder mounting through hole 24 corresponding to the drive cylinder 4. The detection positioning support 2 is also provided with an air path connection passage 241 communicating with the cylinder mounting through hole 24. The drive cylinder 4 passes through the cylinder mounting through hole 24 on the detection positioning support 2, and a needle seat connecting block 63 (which is conventional technology in the art and will not be described in detail here) is provided on its piston rod. The needle seat connecting block 63 is located at its inner end, that is, the end facing the detection positioning chamber 201. Figure 2 A needle holder mounting edge 630 is provided downwards at the left end of the needle holder mounting edge 630, and a needle holder 60 is provided on the needle holder mounting edge 630. Specifically, the bottom surface of the needle holder mounting edge 630 has a corresponding end ( ) of the needle holder 60. Figure 2 The needle seat mounting groove 631 that matches the right end of the needle seat 60, and the corresponding end of the needle seat 60 ( Figure 2 Two mounting through holes 601 are provided on the right end of the needle seat 60. The bottom wall of the needle seat mounting groove 631 has mounting threaded holes corresponding one-to-one with the mounting through holes 601 on the needle seat 60 (this is conventional technology in the art and will not be described further here). A screw is selected, passes through the mounting through holes 601 on the needle seat 60, and is tightened into the corresponding mounting threaded holes on the bottom wall of the needle seat mounting groove 631; the needle seat 60 at its inner end ( Figure 2 A row of probes 6 is arranged laterally at the left end (the end furthest from the drive cylinder 4); the detection and positioning support 2 is located at the end closest to the drive cylinder 4. Figure 2 The right end of the needle holder 60 is provided with a positioning plate 5 corresponding to the needle holder 60. The specific arrangement of the positioning plate 5 is as follows: the detection positioning support 2 is located at one end near the drive cylinder 4. Figure 2 The right end of the middle) is provided with a corresponding end to the positioning plate 5. Figure 2 The positioning recess 202 corresponding to the right end of the positioning recess 202 has three mounting threaded holes 2021 on its bottom wall. The positioning plate 5 has mounting countersunk holes 51 that correspond one-to-one with the mounting threaded holes 2021 on the bottom wall of the positioning recess 202. The detection positioning support 2 has a limiting stop 23 that protrudes from the positioning recess 202 on the side of the positioning recess 202 near the drive cylinder 4. The corresponding end of the positioning plate 5 ( Figure 2 The right end of the screw is placed in the positioning recess 202 of the detection positioning support 2 and against the foot limit stop 23. A flat-head screw is selected, passes through the mounting flat-head countersunk hole 51 on the positioning plate 5, and is tightened in the corresponding mounting threaded hole 2021 on the bottom wall of the positioning recess 202.
[0024] The working process of this utility model is as follows: the controller 9 is pushed to the right along the detection positioning groove 301 of the detection positioning block 3, so that the needle seat 60 enters the housing 90 of the controller 9, and the position of the controller 9 is positioned by the positioning plate 5 (see...). Figure 3 (As shown); then, press the start button, the solenoid valve 40 is energized, driving the piston rod of the cylinder 4 to retract inward, so that the needle seat 60, carrying a row of probes 6, simultaneously, smoothly, and vertically presses against the corresponding test points, forming a reliable electrical connection between the probes 6 and the product test points; at this time, electrical signal testing can be performed on the PCBA91 in the controller 9 (see...). Figure 4 (As shown).
[0025] In summary, the above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent variations and modifications made to the shape, structure, features and spirit described in the claims of the present utility model should be included within the scope of the claims of the present utility model.
Claims
1. An electrical signal testing fixture, comprising: The base is characterized in that it has an upwardly open mounting chamber, a detection positioning support is provided on the base and covers the mounting chamber, the detection positioning support has a detection positioning chamber, a detection positioning block is provided in the detection positioning chamber, an installation positioning structure is provided between the detection positioning block and the detection positioning chamber, the detection positioning block has a detection positioning groove, a drive cylinder is provided in the mounting chamber of the base, the detection positioning support has a cylinder mounting hole corresponding to the drive cylinder, the drive cylinder passes through the cylinder mounting hole on the detection positioning support and a needle seat connecting block is provided on its piston rod, the needle seat connecting block has a needle seat mounting edge provided downward at its inner end, i.e., the end facing the detection positioning chamber, and a needle seat is provided on the needle seat mounting edge, a row of probes is provided at the inner end of the needle seat, i.e., the end away from the drive cylinder; the detection positioning support has a positioning plate corresponding to the needle seat at the end near the drive cylinder.
2. The electrical signal testing fixture as described in claim 1, characterized in that, The installation positioning structure is configured such that at least one positioning protrusion is provided on each of the two side walls of the positioning chamber of the detection positioning support, and a positioning groove corresponding to the positioning protrusion is provided on the detection positioning block.
3. The electrical signal testing fixture as described in claim 2, characterized in that, The specific configuration of the positioning plate is as follows: the detection positioning support has a positioning recess at one end near the drive cylinder that corresponds to the corresponding end of the positioning plate. At least two mounting threaded holes are provided on the bottom wall of the positioning recess. The positioning plate has mounting countersunk holes that correspond one-to-one with the mounting threaded holes on the bottom wall of the positioning recess. The detection positioning support has a limiting stop that extends above the positioning recess on the side of the positioning recess near the drive cylinder. The corresponding end of the positioning plate is placed in the positioning recess of the detection positioning support and rests against the limiting stop. A flat-head screw is selected, passes through the mounting countersunk hole on the positioning plate, and is tightened in the corresponding mounting threaded hole on the bottom wall of the positioning recess.
4. The electrical signal testing fixture as described in claim 3, characterized in that, The installation chamber is also equipped with a solenoid valve for switching the air path, and the detection and positioning support is equipped with an air path connection passage.
5. The electrical signal testing fixture as described in claim 4, characterized in that, The air passageway is connected to the cylinder mounting hole.
6. An electrical signal testing fixture as described in any one of claims 1 to 5, characterized in that, The specific arrangement of the needle seat and the needle seat mounting edge is as follows: a needle seat mounting groove that mates with the needle seat is opened on the bottom surface of the needle seat mounting edge, and a mounting thread hole is opened on the bottom wall of the needle seat mounting groove. A mounting through hole is opened on the corresponding end of the needle seat, which corresponds one-to-one with the mounting thread hole on the bottom wall of the needle seat mounting groove. A screw is selected, passes through the mounting through hole on the needle seat, and is tightened in the corresponding mounting thread hole on the bottom wall of the needle seat mounting groove.