A probe with detachable test head

Abstract

The utility model discloses a kind of probe of detachable test head, including test head, rotation-stopping slide needle and probe main body;Test head is fixedly connected in the upper end of rotation-stopping slide needle by screw thread cooperation;Rotation-stopping slide needle is located in the needle sleeve of probe main body, and the lower end of rotation-stopping slide needle is on the slide needle spring in probe main body, rotation-stopping slide needle is lifted up by the action of slide needle spring, so that the upper end of test head is stretched out from the needle sleeve of probe main body;Rotation-stopping slide needle and needle sleeve are equipped with rotation-stopping mechanism and prevent rotation-stopping slide needle from being prevented from the rotation-stopping slide needle and the axial disengagement of needle sleeve and prevent rotation-stopping slide needle from being prevented from the rotation-stopping slide needle and the axial disengagement of needle sleeve.The utility model can replace test head alone, and cost is lower, and change quickly, and installation adjustment is also more convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of connector testing, specifically to a probe with a replaceable test head. Background Technology

[0002] As is well known, a probe is a tool used to detect the presence of current or voltage in a circuit. In a traditional probe design, the test head 10 and the probe body 100 are integrated.

[0003] for example Figure 1-1 The switch pin shown mainly consists of a test head 10, a tail pin 20, a spring 30, a pin sleeve 40, and a fixing sleeve 50. The tail pin 20, spring 30, pin sleeve 40, and fixing sleeve 50 constitute the probe body 100. The pin sleeve 40 is used to assemble the test head 10, tail pin 20, and spring 30. The spring 30 controls the lower end of the test head 10 and the upper end of the tail pin 20 to be normally open, and the upper end of the test head 10 and the lower end of the tail pin 20 extend from the pin sleeve 40 respectively. The test head 10 is used to contact the object to be tested. The pin sleeve 40 and tail pin 20 are used to make electrical connections with the circuit board or other connecting components. The fixing sleeve 50 fixes the switch pin on the circuit board or other mounting position to ensure its stability and reliability. Once assembled, the test head 10 is integrated with the probe body 100. During testing, the test head 10 comes into contact with the object to be tested, causing the test head 10 to compress the spring 30 into the needle sleeve 40 and the tail needle 20. The needle sleeve 40, the test head 10 and the tail needle 20 are connected, proving that the object to be tested exists.

[0004] For example Figure 1-2 The threaded needle shown mainly consists of a test head 10, a spring 30, a needle sleeve 40, and a fixing sleeve 50. The spring 30, needle sleeve 40, and fixing sleeve 50 constitute the probe body 100. The needle sleeve 40 is used to assemble the test head 10 and the spring 30. The needle sleeve 40 and the fixing sleeve 50 are assembled together using a threaded connection. The fixing sleeve 50 secures the threaded needle to the circuit board or other mounting position, ensuring its stability and reliability. The spring 30 is used to hold the lower end of the test head 10, allowing the upper end of the test head 10 to extend from the needle sleeve 40. The test head 10 is used to contact the object under test, and the needle sleeve 40 is used to make an electrical connection with the circuit board or other connecting components. Once assembled, the test head 10 is integrated with the probe body 100. During testing, the test head 10 contacts the object under test, establishing a connection and proving the existence of the object under test.

[0005] In actual testing, the test head 10 is prone to bending, which can damage the entire probe. Since the test head 10 and the probe body 100 are integrated, the entire probe needs to be replaced. Replacing the probe requires rewiring, which is time-consuming and costly, and the inventory costs are also extremely high. Utility Model Content

[0006] The purpose of this invention is to provide a novel probe with a replaceable test head, which allows for individual replacement of the test head, resulting in lower costs, faster replacement, and easier installation and adjustment.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] A probe with a replaceable test head includes a test head, an anti-rotation sliding pin, and a probe body. The test head is fixedly connected to the upper end of the anti-rotation sliding pin via a threaded connection. The anti-rotation sliding pin is disposed in the needle sleeve of the probe body, and the lower end of the anti-rotation sliding pin abuts against a sliding pin spring inside the probe body. The anti-rotation sliding pin is pushed upward by the action of the sliding pin spring, so that the upper end of the test head extends out of the needle sleeve of the probe body. An anti-rotation mechanism to prevent the anti-rotation sliding pin from rotating radially relative to the needle sleeve and an anti-detachment mechanism to prevent the anti-rotation sliding pin from axially disengaging relative to the needle sleeve are provided between the anti-rotation sliding pin and the needle sleeve.

[0009] The probe body includes a sliding needle spring, a needle sleeve, and a terminal block. The sliding needle spring is located in the needle sleeve, and the terminal block is fixed at the lower end of the needle sleeve. The two ends of the sliding needle spring abut against the anti-rotation sliding needle and the terminal block.

[0010] The probe body includes a tail needle, a sliding needle spring, an insulating sleeve, and a needle sleeve; the tail needle, sliding needle spring, and insulating sleeve are disposed in the needle sleeve; the tail needle is disposed in the insulating sleeve, and the insulating sleeve is disposed in the needle sleeve, so that the tail needle is fixed in the needle sleeve by means of the insulating sleeve, and the lower end of the tail needle extends out from the needle sleeve; the sliding needle spring is disposed between the anti-rotation sliding needle and the tail needle, and the two ends of the sliding needle spring abut against the anti-rotation sliding needle and the insulating sleeve, so that the lower end of the anti-rotation sliding needle and the upper end of the tail needle are normally open.

[0011] Furthermore, the test head has an externally threaded rod, and the upper end of the anti-rotation pin has an internally threaded hole. The test head is fixedly connected to the upper end of the anti-rotation pin through the engagement of its externally threaded rod and the internally threaded hole. Alternatively, the test head has an internally threaded hole, and the upper end of the anti-rotation pin has an externally threaded rod. The test head is fixedly connected to the upper end of the anti-rotation pin through the engagement of its internally threaded hole and the externally threaded rod.

[0012] Furthermore, the anti-dislodgement mechanism is as follows: an outer boss is formed on the anti-rotation sliding needle, and an inner convex ring is formed on the inner wall of the needle sleeve corresponding to the outer boss. The inner convex ring cooperates with the outer boss to prevent the anti-rotation sliding needle from axially dislodging relative to the needle sleeve. Alternatively, the anti-dislodgement mechanism is as follows: the upper section of the inner wall of the needle sleeve has a narrowed diameter to form an inner retaining platform. The anti-rotation sliding needle is confined in the needle sleeve by the inner retaining platform, preventing the anti-rotation sliding needle from axially dislodging relative to the needle sleeve.

[0013] Furthermore, the anti-rotation mechanism comprises: forming an anti-rotation notch on the needle sleeve, and forming an anti-rotation protrusion on the anti-rotation sliding needle corresponding to the anti-rotation notch; the anti-rotation notch and the anti-rotation protrusion cooperate to prevent the anti-rotation sliding needle from rotating radially relative to the needle sleeve. Alternatively, the anti-rotation mechanism comprises: forming a non-circular hole inside the needle sleeve, and forming a non-cylindrical segment on the anti-rotation sliding needle corresponding to the non-circular hole; the non-cylindrical segment and the non-circular hole cooperate to prevent the anti-rotation sliding needle from rotating radially relative to the needle sleeve. The non-circular hole can be a square hole, a triangular hole, a polygonal hole, or a flower-shaped hole; correspondingly, the non-cylindrical segment can be a square column segment, a triangular column segment, a polygonal column segment, or a flower-shaped column segment.

[0014] A further specific design is that the anti-dislodgement mechanism is: an outer boss is formed at the lower end of the anti-rotation sliding needle, and an inner convex ring is formed on the inner wall of the needle sleeve corresponding to the outer boss. The inner convex ring cooperates with the outer boss to prevent the anti-rotation sliding needle from axially dislodging relative to the needle sleeve. The anti-rotation mechanism is: a non-circular hole is formed in the inner convex ring of the needle sleeve, and a non-cylindrical section is formed on the anti-rotation sliding needle corresponding to the non-circular hole. The non-cylindrical section of the anti-rotation sliding needle cooperates with the non-circular hole of the inner convex ring of the needle sleeve to prevent the anti-rotation sliding needle from rotating radially relative to the needle sleeve.

[0015] Furthermore, the tail needle consists of a tail needle tip, a tail needle spring, and a tail needle housing. The tail needle tip and the tail needle spring are assembled sequentially in the tail needle housing. The tail needle tip extends out of the tail needle housing under the action of the tail needle spring. An axial limiting mechanism is provided between the tail needle housing and the tail needle tip to restrict the tail needle tip from coming out of the tail needle housing.

[0016] Furthermore, the test area of ​​the test head is increased, such as forming a protrusion.

[0017] Furthermore, the head of the test head is formed with an adjustment slot or a square slot, or the test head is formed with a screw-on bayonet.

[0018] Furthermore, the needle sleeve has a tail thread at one end corresponding to the tail needle, which is used for threaded connection with the test module, facilitating installation and replacement.

[0019] By adopting the above solution, this utility model adds an anti-rotation sliding pin, which is fixedly connected to the test head through a threaded connection, making the test head and probe body a detachable separate structure. During testing, the test head contacts the test object, and the test head drives the anti-rotation sliding pin, causing the anti-rotation sliding pin to press down on the sliding pin spring, forming a connection and proving the presence of the test object.

[0020] Compared with traditional probes, this invention has the following significant advantages:

[0021] First, the probe body is standardized; different test heads are only needed for different test requirements.

[0022] Second, if the probe's test head is damaged, simply replace the test head directly, which greatly reduces costs. There is no need to rewire during replacement, significantly shortening the replacement time and making the replacement operation faster.

[0023] Third, for probes of the same shape and specifications, the separate test head can be made thicker and more robust than traditional probes, making it less prone to damage.

[0024] IV. Adjusting the height only requires adjusting the height of the test head; there is no need to adjust the height of the probe body.

[0025] 5. The probe body is standardized and does not need to be replaced. The probe sleeve can be directly fixed to the test module, simplifying the probe structure and eliminating the fixing sleeve at the tail of the probe sleeve. Moreover, the probe shape after eliminating the fixing sleeve can be made thinner than the traditional structure, which is suitable for testing connectors with smaller pitch.

[0026] 6. If necessary, a tail thread can be machined at the tail of the needle sleeve to adjust the height of the probe body in conjunction with the fixing sleeve. In this way, the height of the test head and the overall probe can be adjusted at the same time, increasing the adjustment range.

[0027] 7. The spare parts warehouse only needs to be equipped with a small number of probe bodies, and only the corresponding test heads need to be provided for various types of probes, which greatly reduces inventory costs.

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0029] Figure 1-1 This is a schematic diagram of the structure of a traditional switch pin;

[0030] Figure 1-2 This is a schematic diagram of the structure of a traditional threaded needle;

[0031] Figure 2 This is an exploded view of Embodiment 1 of this utility model;

[0032] Figure 3 yes Figure 2 A schematic diagram of the combination;

[0033] Figure 4 yes Figure 3 AA cross-sectional diagram;

[0034] Figure 5 yes Figure 2 Top view of the test needle;

[0035] Figure 6 yes Figure 2 Top view of the anti-rotation sliding pin;

[0036] Figure 7 This is a schematic diagram of the combination of Embodiment 2 of this utility model;

[0037] Figure 8 yes Figure 7 BB cross-section diagram;

[0038] Figure 9 This is an exploded view of Embodiment 3 of this utility model;

[0039] Figure 10 yes Figure 9 A schematic diagram of the combination;

[0040] Figure 11 yes Figure 9 Top view of the anti-rotation sliding pin;

[0041] Figure 12 This is the test probe of Embodiment 4 of this utility model;

[0042] Figure 13 This is an exploded view of Embodiment 5 of this utility model;

[0043] Figure 14 yes Figure 13 A schematic diagram of the combination;

[0044] Figure 15 This is an exploded view of Embodiment Six of this utility model;

[0045] Figure 16 This is a partial schematic diagram of Embodiment Seven of this utility model;

[0046] Figure 17 This is an exploded view of embodiment eight of this utility model;

[0047] Figure 18 yes Figure 17 A schematic diagram of the combination;

[0048] Figure 19 This is an exploded view of embodiment nine of this utility model;

[0049] Figure 20 yes Figure 19 A schematic diagram of the combination;

[0050] Figure 21 This is an exploded view of Embodiment 10 of this utility model;

[0051] Figure 22 yes Figure 21 A schematic diagram of the combination;

[0052] Figure 23 yes Figure 21 cc cross-section diagram 1;

[0053] Figure 24 yes Figure 21 cc profile Figure 2;

[0054] Figure 25 This is an exploded view of Embodiment Eleven of this utility model;

[0055] Figure 26 yes Figure 25 DD cross-sectional diagram;

[0056] Figure 27 This is the test probe of Embodiment Twelve of this utility model;

[0057] Figure 28 yes Figure 27 Top view;

[0058] Figure 29 This is the test probe of embodiment thirteen of this utility model;

[0059] Figure 30 yes Figure 29 Top view.

[0060] Label Explanation

[0061] Test head 10, tail needle 20, spring 30, needle sleeve 40, fixing sleeve 50, probe body 100;

[0062] Test head 1, external thread rod 11, internal thread hole 12, boss 13, slot 14, bayonet 15;

[0063] Anti-rotation pin 2, internal threaded hole 21, external threaded rod 22, external boss 23, anti-rotation protrusion 24, non-cylindrical section 25;

[0064] Tail needle 3, tail needle tip 31, tail needle spring 32, tail needle housing 33, axial limiting mechanism 34;

[0065] 4. Sliding needle spring;

[0066] Insulating sleeve 5;

[0067] Needle sleeve 6, inner convex ring 61, anti-rotation notch 62, non-circular hole 63, tail thread 64, terminal block 65, inner retaining platform 66. Detailed Implementation

[0068] The embodiments of this utility model will be fully described below with reference to the accompanying drawings. It should be noted that this utility model can be implemented in different forms, and the specific embodiments described herein are merely illustrative of the relevant structures and are not intended to limit the scope of the invention. These embodiments are provided to provide a thorough and complete disclosure of the utility model and to fully convey its scope to those skilled in the art. Furthermore, the embodiments and features described herein can be combined with each other without conflict. For ease of description, only the parts relevant to the inventive innovation are shown in the accompanying drawings.

[0069] In the description of this application, it should be understood that the terms "front," "rear," "left," "right," "upper," "lower," "inner," "outer," "first," and "second," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The simple fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used for improvement. Any reference signs in the claims should not be interpreted as limiting the scope. The embodiments described above are only for illustrating the technical ideas and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly, but do not limit the patent scope of this utility model. All equivalent changes or modifications made in accordance with the spirit disclosed in this utility model should still be covered within the patent scope of this utility model.

[0070] like Figures 2 to 30 As shown, this utility model discloses a probe with a replaceable test head, including a test head 1, an anti-rotation sliding needle 2, and a probe body. For the switch needles shown in Embodiments 1 to 8, the probe body includes a tail needle 3, a sliding needle spring 4, an insulating sleeve 5, and a needle sleeve 6. For the threaded needles shown in Embodiments 9 to 13, the probe body includes a sliding needle spring 4, a needle sleeve 6, and a terminal block 65. Of course, the lower end of the needle sleeve 6 can be made closed, thus omitting the terminal block.

[0071] The test head 1 is fixedly connected to the upper end of the anti-rotation sliding needle 2 via a threaded connection. Specifically, the threaded connection can be as follows: Figure 2 Example 1 Figure 7 Example 2 Figure 13 Example 5 Figure 19 As shown in Embodiment Nine, the test head 1 has an externally threaded rod 11, and the upper end of the anti-rotation sliding needle 2 has an internally threaded hole 21. The test head 1 is fixedly connected to the upper end of the anti-rotation sliding needle 2 through the engagement of its externally threaded rod 11 with the internally threaded hole 21. The threaded engagement can also be as follows... Figure 9 Example 3 Figure 15 Example 6 Figure 17 Example 8 Figure 21 Example 10 Figure 25As shown in Embodiment Eleven, the test head 1 has an internal threaded hole 12, and the upper end of the anti-rotation sliding needle 2 has an external threaded rod 22. The test head 1 is fixedly connected to the upper end of the anti-rotation sliding needle 2 through its internal threaded hole 12 and the external threaded rod 22 of the anti-rotation sliding needle 2.

[0072] The anti-rotation sliding pin 2 is located in the needle sleeve 6 of the probe body, and the lower end of the anti-rotation sliding pin 2 abuts against the sliding pin spring 4 inside the probe body. With the help of the sliding pin spring 4, the anti-rotation sliding pin 2 is pushed upward, so that the upper end of the test head 1 extends out of the needle sleeve 6 of the probe body. For the switching pin, the tail pin 3, the sliding pin spring 4, and the insulating sleeve 5 are located in the needle sleeve 6; the tail pin 3 is fitted in the insulating sleeve 5, and the insulating sleeve 5 is fitted in the needle sleeve 6, so that the tail pin 3 is fixed in the needle sleeve 6 by means of the insulating sleeve 5. The lower end of the tail pin 3 extends out of the needle sleeve 6 for circuit connection with the test module (external device, not shown in the figure); the sliding pin spring 4 is located between the anti-rotation sliding pin 2 and the tail pin 3, and the two ends of the sliding pin spring 4 abut against the anti-rotation sliding pin 3 and the insulating sleeve 5, so that the lower end of the anti-rotation sliding pin 2 and the upper end of the tail pin 3 are normally open, and the anti-rotation sliding pin 2 pushes the test head 1 outward at all times for contact with the object being tested. For the threaded needle, the sliding needle spring 4 is located in the needle sleeve 6, the terminal block 65 is fixed at the lower end of the needle sleeve 6, and the two ends of the sliding needle spring 4 abut against the anti-rotation sliding needle 3 and the terminal block 65.

[0073] An anti-rotation mechanism and an anti-dislodgement mechanism are provided between the anti-rotation sliding needle 2 and the needle sleeve 6. The anti-rotation mechanism is used to prevent the anti-rotation sliding needle 2 from rotating radially relative to the needle sleeve 6, and the anti-dislodgement mechanism is used to prevent the anti-rotation sliding needle 2 from dislodging axially relative to the needle sleeve 6. Specifically, the anti-dislodgement mechanism is as follows: Figures 2-4 , Figures 7-10 , Figures 13-15 , Figure 25 As shown: an outer protrusion 23 is formed on the anti-rotation sliding needle 2, and an inner protruding ring 61 is formed on the inner wall of the needle sleeve 6 corresponding to the outer protrusion 23. The inner protruding ring 61 cooperates with the outer protrusion 23 to prevent the anti-rotation sliding needle 2 from axially dislodging relative to the needle sleeve 6. Alternatively, the anti-dislodgement mechanism is as follows: Figures 17-22 As shown, an inner retaining platform 66 is formed by narrowing the inner wall of the upper section of the needle sleeve 6. The anti-rotation sliding needle 2 is restrained in the needle sleeve 6 by the inner retaining platform 66, preventing the anti-rotation sliding needle 2 from axially dislodging relative to the needle sleeve 6. The anti-rotation mechanism can be as follows: Figures 13 to 15 The anti-rotation notch 62 is formed on the needle sleeve 6, and an anti-rotation protrusion 24 is formed on the anti-rotation sliding needle 2 corresponding to the anti-rotation notch 62. The anti-rotation notch 62 and the anti-rotation protrusion 24 cooperate to prevent the anti-rotation sliding needle 2 from rotating radially relative to the needle sleeve 6. The anti-rotation mechanism can also be as follows: Figures 2-4 , Figures 7-10 , Figures 17-22 , Figure 25As shown, a non-circular hole 63 is formed inside the needle sleeve 6, and a non-cylindrical segment 25 is formed on the anti-rotation sliding needle 2 corresponding to the non-circular hole 63. The non-cylindrical segment 25 engages with the non-circular hole 63 to prevent the anti-rotation sliding needle 2 from rotating radially relative to the needle sleeve 6. Figures 2-4 , Figures 7-10 , Figure 25 The diagram further illustrates the direct formation of a non-circular hole 63 within the inner convex ring 61. The non-circular hole 63 can be a square hole (e.g.,...). Figure 4 , Figure 8 , Figure 23 and Figure 24 As shown), the holes can be triangular, polygonal, or flower-shaped, etc. Correspondingly, the non-cylindrical segment 25 can be a square column segment (such as...). Figure 4 , Figure 8 and Figure 26 As shown), triangular prism segments, polygonal prism segments, or flower-shaped prism segments, etc., as long as the structural design can prevent the anti-rotation slip needle 2 from rotating radially relative to the needle sleeve 6, all constitute the equivalent design of this case.

[0074] The tail needle 3 of this utility model can be specifically composed of a tail needle head 31, a tail needle spring 32, and a tail needle housing 33. The tail needle head 31 and the tail needle spring 32 are sequentially assembled in the tail needle housing 33. The tail needle head 31 extends out of the tail needle housing 33 under the action of the tail needle spring 32. An axial limiting mechanism 34 is provided between the tail needle housing 33 and the tail needle head 31 to restrict the tail needle head 31 from coming out of the tail needle housing 33. The axial limiting mechanism 34 is shown in the figure but is not limited to the structure shown in the figure.

[0075] This invention further increases the head testing area of ​​the test head 1, such as... Figure 2 , Figure 3 , Figure 7 , Figure 9 , Figure 10 , Figures 13-15 , Figures 17-18 , Figures 29-30 The protrusion 13 is formed, making the test head 1 more robust and less prone to damage, and can also be used as... Figure 12 , Figures 19-22 , Figure 25 , Figures 27-28 It has no protrusions and a rounded head. For easier adjustment, such as... Figure 2 , Figure 3 , Figure 4 The test head 1 also has an adjustment slot 14 or a square slot, which facilitates adjustment using a screwdriver or similar tool. Figures 19-22 , Figure 25 , Figures 27-30 The test head 1 has a screw-in slot 15, which facilitates the use of tools to clamp and screw for adjustment.

[0076] This utility model can further be as follows: Figure 16 As shown, a tail thread 64 is formed at one end of the needle sleeve 6 corresponding to the tail needle 3 for threaded connection with the test module (external device, not shown in the figure), facilitating the installation and replacement of the entire probe. However, because this invention adds an anti-rotation sliding pin 2, the test head 1 and the anti-rotation sliding pin 2 are fixedly connected by a threaded engagement, and the height is easily adjusted. Therefore, under normal circumstances, it is not necessary to replace the entire probe. When adjusting the height, only the height of the test head 1 needs to be adjusted, without adjusting the overall height of the probe. The added tail thread 64 can, when necessary, add a fixing sleeve, which, together with the thread adjustment of the test head 1 and the anti-rotation sliding pin 2, can simultaneously adjust the height of the test head 1 and the entire probe, achieving a dual adjustment function and increasing the adjustment range.

[0077] In the switch needles shown in Embodiments 1 to 8 of this utility model, during the testing process, when the test head 1 contacts the test object, the test head 1 will drive the anti-rotation sliding needle 2. The anti-rotation sliding needle 2 will press down on the sliding needle spring 4 until the anti-rotation sliding needle 2 contacts the tail needle 3, so that the needle sleeve 6 in contact with the anti-rotation sliding needle 2 and the tail needle 3 form a communication relationship, proving the existence of the test object. In the threaded needles shown in Embodiments 9 to 13 of this utility model, during the testing process, when the test head 1 contacts the test object, the test head 1 will drive the anti-rotation sliding needle 2, and the needle sleeve 6 in contact with the anti-rotation sliding needle 2 will form a communication relationship, proving the existence of the test object.

[0078] If the test head 1 bends during testing, causing the probe to be damaged, this invention only requires replacing the test head 1 directly. Replacement does not require rewiring, making the replacement quick and cost-effective. For the same type of probe (such as a switch pin or a threaded pin), the structure of the probe body can remain uniform. Different models of test heads 1 can be configured according to different testing requirements. Furthermore, test heads 1 of the same shape and specifications are thicker and less prone to damage than traditional probes.

[0079] Because the structure of the probe body can remain uniform after installation, even if the test head 1 is damaged, the probe body does not need to be replaced. Furthermore, after the probe body (pin sleeve 6) is fixed, the height of the test head 1 on the anti-rotation sliding pin 2 can be adjusted via threaded engagement, eliminating the need to adjust the height of the probe body itself. Therefore, the pin sleeve 6 of the probe body can be directly fixed to the test module without the need for a fixing sleeve. This simplifies the probe structure and allows for a smaller, thinner overall probe shape, suitable for testing connectors with smaller pitches. Moreover, because the probe body structure of the same type of probe is uniform, only a small number of probe bodies need to be stocked in the spare parts warehouse for the same type of probe, and only the corresponding test heads need to be provided for various probe models, significantly reducing inventory costs.

[0080] The following is a comparative description of the various embodiments.

[0081] One embodiment of this utility model is a switch pin, such as... Figures 2 to 6 As shown, the device includes a test head 1, an anti-rotation sliding needle 2, a tail needle 3, a sliding needle spring 4, an insulating sleeve 5, and a needle sleeve 6. The test head 1 is fixedly connected to the upper end of the anti-rotation sliding needle 2 through its external threaded rod 11 engaging with the internal threaded hole 21 of the anti-rotation sliding needle 2. An inner convex ring 61 is formed on the inner wall of the cylindrical needle sleeve 6, and a non-circular hole 63 is formed in the inner convex ring 61 by compression. A corresponding non-cylindrical section 25 is formed on the anti-rotation sliding needle 2, which can smoothly pass through the non-circular hole 63 axially. However, the non-cylindrical section 25 cannot rotate radially due to its engagement with the non-circular hole 63, thus restricting the radial rotation of the anti-rotation sliding needle 2 relative to the needle sleeve 6. An outer boss 23 is also formed at the lower end of the anti-rotation sliding needle 2. The outer boss 23 cannot pass through the non-circular hole 63 of the inner convex ring 61. In this way, the inner convex ring 61 blocks the outer boss 23, preventing the anti-rotation sliding needle 2 from axially dislodging from the needle sleeve 6. The test head 1 has an enlarged test area and a protrusion 13, making it more robust and less prone to damage. The test head 1 also has an adjustment slot 14 for easy adjustment using a screwdriver or similar tool.

[0082] The second embodiment of this utility model is a switch pin, such as... Figures 7 to 8 As shown, the difference from Embodiment 1 is the structure of the inner convex ring 61: In Embodiment 1, the inner convex ring 61 is formed by pressing the needle sleeve 6 into a square shape. Figure 4 In contrast, the inner convex ring 61 in Embodiment 2 uses a machined structure. Figure 8 It can be broached, made of material with an outer circle and an inner square.

[0083] Embodiment three of this utility model is a switch pin, such as... Figures 9 to 11 As shown, the difference from Embodiment 1 is the connection structure between the test head 1 and the anti-rotation sliding needle 2: the test head 1 is fixedly connected to the upper end of the anti-rotation sliding needle 2 through its internal threaded hole 12 and the external threaded rod 22 of the anti-rotation sliding needle 2.

[0084] Embodiment four of this utility model is as follows Figure 12 As shown, the head of the test head 1 is round without a protrusion, and the head of the test head 1 also has an adjustment slot 14 to facilitate adjustment using a screwdriver or the like.

[0085] Embodiment five of this utility model is a switch pin, such as... Figures 13 to 14 As shown, the difference from Embodiment 1 is the anti-rotation mechanism: the anti-rotation sliding needle 2 prevents the anti-rotation sliding needle 2 from rotating radially relative to the needle sleeve 6 by means of its anti-rotation protrusion 24 cooperating with the anti-rotation notch 62 of the needle sleeve 6.

[0086] Embodiment six of this utility model is a switch pin, such as... Figure 15 As shown, the difference from Embodiment 1 lies in the connection structure and anti-rotation mechanism between the test head 1 and the anti-rotation sliding needle 2: the test head 1 is fixedly connected to the upper end of the anti-rotation sliding needle 2 through its internal threaded hole 12 and the external threaded rod 22 of the anti-rotation sliding needle 2. Furthermore, the anti-rotation sliding needle 2 prevents radial rotation relative to the needle sleeve 6 by engaging its anti-rotation protrusion 24 with the anti-rotation notch 62 of the needle sleeve 6.

[0087] Embodiment 7 of this utility model is as follows Figure 16 As shown, the needle sleeve 6 forms a tail thread 64 at one end corresponding to the tail needle 3, so that the height of the probe body (needle sleeve 6) can be adjusted when the probe is installed. In conjunction with the threads of the test head 1 and the anti-rotation sliding needle 2, the height of the test head 1 can be adjusted, so as to simultaneously adjust the height of the test head 1 and the overall probe, thus playing a dual adjustment role and increasing the adjustment range.

[0088] Embodiment eight of this utility model is a switch pin, such as... Figures 17 to 18 As shown, the difference from Embodiment 1 lies in the connection structure and anti-detachment mechanism of the test head 1 and the anti-rotation sliding needle 2: The test head 1 is fixedly connected to the upper end of the anti-rotation sliding needle 2 through its internal threaded hole 12 and the external threaded rod 22 of the anti-rotation sliding needle 2. A non-circular hole 63 is formed inside the needle sleeve 6, and a non-cylindrical section 25 is formed on the anti-rotation sliding needle 2 corresponding to the non-circular hole 63. The non-cylindrical section 25 can pass smoothly through the non-circular hole 63 axially, but cannot rotate radially due to the cooperation between the non-cylindrical section 25 and the non-circular hole 63, thereby restricting the radial rotation of the anti-rotation sliding needle 2 relative to the needle sleeve 6; the inner wall of the upper section of the needle sleeve 6 is narrowed to form an inner retaining platform 66, and the anti-rotation sliding needle 2 is retained in the needle sleeve 6 by the inner retaining platform 66 at the junction of the external threaded rod 22 and the non-cylindrical section 25, preventing the anti-rotation sliding needle 2 from axially detaching from the needle sleeve 6.

[0089] Embodiment nine of this utility model is a threaded needle, such as... Figures 19 to 20 As shown, the device includes a test head 1, an anti-rotation sliding pin 2, a sliding pin spring 4, a pin sleeve 6, and a terminal block 65. The test head 1 is fixedly connected to the upper end of the anti-rotation sliding pin 2 via its external threaded rod 11 engaging with the internal threaded hole 21 of the anti-rotation sliding pin 2. A non-circular hole 63 is formed inside the pin sleeve 6, and a non-cylindrical section 25 is formed on the anti-rotation sliding pin 2 corresponding to the non-circular hole 63. The engagement of the non-cylindrical section 25 with the non-circular hole 63 prevents the anti-rotation sliding pin 2 from rotating radially relative to the pin sleeve 6. An inner retaining platform 66 is formed on the inner wall of the upper section of the pin sleeve 6, which holds the anti-rotation sliding pin 2 in place and prevents it from axially dislodging from the pin sleeve 6. A screw-in slot 15 is formed on the test head 1 to facilitate adjustment using tools.

[0090] Embodiment ten of this utility model is a threaded needle, such as... Figures 21 to 22As shown, the difference from Embodiment Nine is the connection structure between the test head 1 and the anti-rotation sliding needle 2: the test head 1 is fixedly connected to the upper end of the anti-rotation sliding needle 2 through its internal threaded hole 12 and the external threaded rod 22 of the anti-rotation sliding needle 2. Additionally, in Embodiment Ten, the anti-rotation sliding needle 2 is restrained in the needle sleeve 6 by an internal retaining plate 66 at the junction of the external threaded rod 22 and the non-cylindrical section 25, preventing the anti-rotation sliding needle 2 from axially dislodging relative to the needle sleeve 6. Figure 23 The diagram shown is a cross-sectional view of the non-circular hole 63. Of course, the cross-section of the non-circular hole 63 can also be shown as... Figure 24 As shown, or other equivalent designs with the same function.

[0091] Embodiment eleven of this utility model is a threaded needle, such as... Figures 25 to 26 As shown, the difference from Embodiment 9 lies in the connection structure, anti-detachment mechanism, and anti-rotation mechanism between the test head 1 and the anti-rotation sliding needle 2: The test head 1 is fixedly connected to the upper end of the anti-rotation sliding needle 2 through its internal threaded hole 12 and the external threaded rod 22 of the anti-rotation sliding needle 2. An external boss 23 is formed on the anti-rotation sliding needle 2, and an internal convex ring 61 is formed on the inner wall of the needle sleeve 6 corresponding to the external boss 23. The internal convex ring 61 cooperates with the external boss 23 to prevent the anti-rotation sliding needle 2 from axially dislodging relative to the needle sleeve 6. A non-circular hole 63 is directly formed in the internal convex ring 61 of the needle sleeve 6, and a non-cylindrical segment 25 is formed on the anti-rotation sliding needle 2 corresponding to the non-circular hole 63. The non-cylindrical segment 25 cooperates with the non-circular hole 63 to prevent the anti-rotation sliding needle 2 from rotating radially relative to the needle sleeve 6.

[0092] Embodiment 12 of this utility model is as follows: Figures 27 to 28 As shown, the head of the test head 1 is round without a protrusion, and a screw-in slot 15 is formed on the test head 1 to facilitate the use of tools to clamp and screw for adjustment.

[0093] Embodiment thirteen of this utility model is as follows: Figures 29 to 30 As shown, the test area of ​​the test head 1 is increased, forming a boss-shaped 13, making the test head 1 more robust and less prone to damage. Furthermore, a screw-in slot 15 is formed on the boss-shaped 13 of the test head 1, facilitating adjustment operations by clamping and screwing it with tools.

[0094] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. It should be noted that any equivalent changes made by those skilled in the art after reading this specification, based on the design concept of this application, fall within the protection scope of this application.

Claims

1. A probe with a replaceable test head, characterized in that: It includes a test head, an anti-rotation sliding pin, and a probe body; the test head is fixedly connected to the upper end of the anti-rotation sliding pin by a threaded connection; the anti-rotation sliding pin is located in the needle sleeve of the probe body, and the lower end of the anti-rotation sliding pin abuts against the sliding pin spring inside the probe body. With the help of the sliding pin spring, the anti-rotation sliding pin is pushed upward, so that the upper end of the test head extends out of the needle sleeve of the probe body; there is an anti-rotation mechanism between the anti-rotation sliding pin and the needle sleeve to prevent the anti-rotation sliding pin from rotating radially relative to the needle sleeve and an anti-detachment mechanism to prevent the anti-rotation sliding pin from axially dislodging relative to the needle sleeve.

2. The probe with a replaceable test head according to claim 1, characterized in that: The probe body includes a sliding needle spring, a needle sleeve, and a terminal block. The sliding needle spring is located in the needle sleeve, and the terminal block is fixed at the lower end of the needle sleeve. The two ends of the sliding needle spring abut against the anti-rotation sliding needle and the terminal block.

3. The probe with a replaceable test head according to claim 1, characterized in that: The probe body includes a tail needle, a sliding needle spring, an insulating sleeve, and a needle sleeve; the tail needle, sliding needle spring, and insulating sleeve are disposed in the needle sleeve; the tail needle is disposed in the insulating sleeve, and the insulating sleeve is disposed in the needle sleeve, so that the tail needle is fixed in the needle sleeve by means of the insulating sleeve, and the lower end of the tail needle extends out from the needle sleeve; the sliding needle spring is disposed between the anti-rotation sliding needle and the tail needle, and the two ends of the sliding needle spring abut against the anti-rotation sliding needle and the insulating sleeve, so that the lower end of the anti-rotation sliding needle and the upper end of the tail needle are normally open.

4. The probe with a replaceable test head according to claim 1, characterized in that: The test head has an external threaded rod, and the upper end of the anti-rotation pin has an internal threaded hole. The test head is fixedly connected to the upper end of the anti-rotation pin through the engagement of its external threaded rod and the internal threaded hole of the anti-rotation pin; or, the test head has an internal threaded hole, and the upper end of the anti-rotation pin has an external threaded rod. The test head is fixedly connected to the upper end of the anti-rotation pin through the engagement of its internal threaded hole and the external threaded rod of the anti-rotation pin.

5. The probe with a replaceable test head according to claim 1, characterized in that: The anti-dislodgement mechanism is as follows: an outer protrusion is formed on the anti-rotation sliding needle, and an inner protrusion ring is formed on the inner wall of the needle sleeve corresponding to the outer protrusion. The inner protrusion ring and the outer protrusion cooperate to prevent the anti-rotation sliding needle from axially dislodging relative to the needle sleeve; or, the anti-dislodgement mechanism is as follows: the inner wall of the upper section of the needle sleeve is narrowed to form an inner retaining platform, and the anti-rotation sliding needle is restricted in the needle sleeve by the inner retaining platform to prevent the anti-rotation sliding needle from axially dislodging relative to the needle sleeve.

6. The probe with a replaceable test head according to claim 1, characterized in that: The anti-rotation mechanism is as follows: an anti-rotation notch is formed on the needle sleeve, and an anti-rotation protrusion is formed on the anti-rotation sliding needle corresponding to the anti-rotation notch. The anti-rotation notch and the anti-rotation protrusion cooperate to prevent the anti-rotation sliding needle from rotating radially relative to the needle sleeve; or, the anti-rotation mechanism is as follows: a non-circular hole is formed inside the needle sleeve, and a non-cylindrical segment is formed on the anti-rotation sliding needle corresponding to the non-circular hole. The non-cylindrical segment and the non-circular hole cooperate to prevent the anti-rotation sliding needle from rotating radially relative to the needle sleeve.

7. The probe with a replaceable test head according to claim 1, characterized in that: The anti-dislodgement mechanism is as follows: an outer protrusion is formed at the lower end of the anti-rotation sliding needle, and an inner convex ring is formed on the inner wall of the needle sleeve corresponding to the outer protrusion. The inner convex ring and the outer protrusion cooperate to prevent the anti-rotation sliding needle from axially dislodging relative to the needle sleeve. The anti-rotation mechanism is as follows: a non-circular hole is formed in the inner convex ring of the needle sleeve, and a non-cylindrical section is formed on the anti-rotation sliding needle corresponding to the non-circular hole. The non-cylindrical section of the anti-rotation sliding needle cooperates with the non-circular hole of the inner convex ring of the needle sleeve to prevent the anti-rotation sliding needle from rotating radially relative to the needle sleeve.

8. The probe with a replaceable test head according to claim 3, characterized in that: The tail needle consists of a tail needle head, a tail needle spring, and a tail needle housing. The tail needle head and the tail needle spring are assembled sequentially in the tail needle housing. The tail needle head extends out of the tail needle housing under the action of the tail needle spring. An axial limiting mechanism is provided between the tail needle housing and the tail needle head to prevent the tail needle head from coming out of the tail needle housing.

9. A probe with a replaceable test head according to claim 1, characterized in that: The head of the test head has an adjustment slot or a square slot; or, the test head has a screw-in bayonet.

10. A probe with a replaceable test head according to claim 3, characterized in that: The needle sleeve has a tail thread at one end corresponding to the tail needle, which is used for threaded connection with the test module.

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