Test probe
By designing a retractable test probe, switching the probe with the chute and spiral groove structure, combined with spring buffering, the problems of typing and multi-point contact in the probe test are solved, and the accuracy and safety of the test are improved.
Patent Information
- Application Number
- CN202323392080.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-13
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-13
AI Technical Summary
In probe testing, as the printed circuit board is miniaturized, the test point size is reduced, and the probe typing phenomenon occurs frequently, and the thick probe may contact multiple test points in a concentrated area, affecting the test results.
A test probe including a needle sleeve, a sliding probe and a retractable housing is designed. By rotating the housing with the needle sleeve, the first probe and the second probe are switched, and the probe is realized using a sliding groove and a helical groove structure. The telescopic and spring buffering are combined to prevent excessive stress and ensure the accuracy of the test.
It realizes flexible switching of probes, adapts to the needs of different test points, avoids probe bias and multi-point contact, improves the accuracy of test results, and protects the probe and test points from excessive force through spring buffering. damage.
Smart Images
Figure CN222189362U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of probes, and in particular relates to a testing probe. Background Art
[0002] A probe is an instrument used to perform electrical tests on products. The relevant electrical parameters are obtained by contacting the probe with the test point.
[0003] As printed circuit boards are gradually becoming smaller, the size of test points is also shrinking. During probe testing, due to the small diameter of the probe, the probe may be deviated, affecting the test results. For areas where some test points are concentrated, the use of thick probes may cause the probe to contact multiple test points at the same time in one test, affecting the test results. Utility Model Content
[0004] The purpose of the utility model is to provide a test probe.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A test probe comprises a needle sleeve and a first probe slidably arranged in the needle sleeve, a sliding groove penetrating the side wall of the needle sleeve is provided along its axial direction, a sliding block sliding in the through groove is provided on the outer peripheral wall of the first probe, a through groove is provided at the axis of the first probe, a second probe is slidably arranged in the through groove, and wires are connected to the first probe and the second probe.
[0007] Preferably, a shell is sleeved on the outer circumferential wall of the needle sleeve, a spiral groove is opened on the inner circumferential wall of the shell, and the sliding block penetrates the sliding groove and is slidably arranged in the spiral groove.
[0008] Preferably, a base is integrally formed at the bottom of the needle sleeve, the cross section of the base is convex-shaped, and the shell is rotatably connected to the base.
[0009] Preferably, the width of the spiral groove is greater than the diameter of the slider, and a spring is provided between the base and the first probe.
[0010] Preferably, a plurality of protrusions are provided at the end of the first probe.
[0011] Preferably, a protective cover is further included, and a convex point which is buckled with the protective cover is arranged on the outer peripheral wall of the needle sleeve.
[0012] The beneficial effect of the utility model is that the relative rotation of the housing and the needle sleeve can drive the first probe to extend and retract, and is used to switch the first probe and the second probe, so as to facilitate testing of different test points. When the first probe is used for testing, the spring will play a buffering role to prevent the first probe or the test point from being damaged due to excessive force. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a cross-sectional view of the utility model.
[0014] Among them: a needle sleeve 10 , a sliding groove 12 , a first probe 14 , a slider 16 , a protrusion 18 , a second probe 20 , a housing 22 , a spiral groove 24 , a base 26 , a spring 28 , a protective cover 30 , and a protrusion 32 . DETAILED DESCRIPTION
[0015] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.
[0016] like Figure 1 As shown, a test probe of the utility model comprises a needle sleeve 10 and a first probe 14 slidably arranged in the needle sleeve 10, a shell 22 is rotatably arranged on the outer peripheral wall of the needle sleeve 10, a spiral groove 24 is provided on the inner peripheral wall of the shell 22, a slide groove 12 penetrating the side wall is provided on the side wall of the needle sleeve 10 along its axial direction, a slider 16 penetrating the slide groove 12 and slidably arranged in the spiral groove 24 is provided on the outer peripheral wall of the first probe 14, a through groove is provided at the axis of the first probe 14, a second probe 20 is slidably arranged in the through groove, and wires (not shown in the figure) are connected to the first probe 14 and the second probe 20;
[0017] Rotating the housing 22 causes the housing 22 and the needle sleeve 10 to rotate relative to each other, and the side wall of the spiral groove 24 applies a force to the slider 16 to make it move. The slider 16 only slides along the length direction of the slide groove 12 under the restriction of the slide groove 12, so that the first probe 14 can slide relative to the second probe 20. Both the first probe 14 and the second probe 20 are connected with wires, which can effectively prevent the poor contact between the first probe 14 and the second probe 20 from affecting the detection result.
[0018] The bottom of the needle sleeve 10 is integrally formed with a base 26, the cross section of the base 26 is convex, the housing 22 is rotatably connected to the base 26, a spring 28 is connected between the base 26 and the first probe 14, and the width of the spiral groove 24 is greater than the diameter of the slider 16;
[0019] When the first probe 14 is used for testing, when the pressure is too high, the spring 28 will be compressed and the first probe 14 will move inward. Since the width of the spiral groove 24 is greater than the diameter of the slider 16, the first probe 14 can slide within a certain range, which can effectively avoid damage to the first probe 14 or the test point due to excessive force.
[0020] The end of the first probe 14 is provided with a plurality of protrusions 18 , which can increase the contact area with the test point. The needle sleeve 10 is provided with a protective cover 30 , which can be buckled to play a protective role when not in use.
[0021] Working principle: When in use, if there is only a single test point in a certain area, the first probe 14 is used for testing. The first probe 4 has a large area and is not prone to deviation during testing. If there are multiple test points in a certain area, the second probe 20 is used for testing. The second probe 0 has a small area and is more accurate during testing, and will not contact multiple test points at the same time.
[0022] The switching method of the first probe 14 and the second probe 20 is as follows: the handheld base 26 is used for fixing, and then the shell 22 is rotated to make the shell 22 and the needle sleeve 10 rotate relative to each other. Under the double limit of the slide groove 12 and the spiral groove 24 on the slider 16, the slider 16 will drive the first probe 14 to move along the length direction of the slide groove 12, so as to switch the first probe 14 and the second probe 20.
[0023] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
[0024] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A test probe, characterized in that: The invention comprises a needle sleeve and a first probe slidably arranged in the needle sleeve, a sliding groove penetrating the side wall of the needle sleeve is provided along its axial direction, a sliding block sliding in the through groove is provided on the outer peripheral wall of the first probe, a through groove is provided at the axis of the first probe, a second probe is slidably arranged in the through groove, and wires are connected to the first probe and the second probe.
2. The test probe according to claim 1, characterized in that: An outer shell is sleeved on the outer circumferential wall of the needle sleeve, a spiral groove is opened on the inner circumferential wall of the outer shell, and the sliding block penetrates the sliding groove and is slidably arranged in the spiral groove.
3. The test probe according to claim 2, characterized in that: The bottom of the needle sleeve is integrally formed with a base, the cross section of the base is in a convex shape, and the shell is rotatably connected to the base.
4. The test probe according to claim 3, characterized in that: The width of the spiral groove is greater than the diameter of the slider, and a spring is arranged between the base and the first probe.
5. The test probe according to claim 4, characterized in that: The end of the first probe is provided with a plurality of protrusions.
6. The test probe according to claim 1, characterized in that: It also includes a protective cover, and the outer peripheral wall of the needle sleeve is provided with a convex point that is buckled with the protective cover.