Probe variable-pitch rotating mechanism

Abstract

The utility model provides a probe pitch-variable rotating mechanism, which comprises a turntable assembly, a mounting unit and a first driving device, and is characterized in that the turntable assembly can be driven to pivot around the central axis of the turntable assembly; the mounting unit comprises a first mounting base and a second mounting base which are oppositely arranged in the first direction, the first direction is perpendicular to the central axis, the second mounting base is connected to the rotating disc assembly, and the first mounting base can move relative to the rotating disc assembly; the first driving device is arranged on one of the two mounting seats, a driving unit of the first driving device is connected with the other mounting seat, and when the driving unit moves, the two mounting seats can move towards each other or back to back in the first direction. According to the utility model, the problems that the probe mechanism for manually adjusting the distance of the probe is low in adjustment precision and cannot be rotationally adjusted are solved.

Description

Technical Field

[0001] The utility model relates to the field of testing devices, in particular to a probe variable pitch rotating mechanism. Background Art

[0002] In the field of modern electronic manufacturing, printed circuit boards (PCBs) are the core components of electronic devices, and their accuracy and reliability are crucial to ensuring the performance of end products. With the continuous advancement of technology and the increasing trend of product miniaturization, the complexity and density of PCBs have increased significantly, which has put forward higher requirements for the accuracy and efficiency of electrical performance verification. Electrical performance verification is not only a confirmation of the correctness of PCB storage, signal processing and power management functions, but also the basis for ensuring the long-term stable operation of products.

[0003] In the traditional electrical performance verification process, dual-contact test probe equipment plays a key role. They are widely used to detect electrical connections, resistance values ​​and signal integrity on PCBs. Such equipment is usually simple in design, allowing operators to manually adjust the distance between probes according to different PCB specifications to adapt to various preset test point layouts on the circuit board. Although manual adjustment provides flexibility to a certain extent, its limitations are becoming increasingly apparent in the face of increasingly complex PCB designs.

[0004] First of all, the manual adjustment of the probe distance relies on the operator's experience and visual judgment, which makes it difficult to achieve high-precision requirements at the micron level. Especially when dealing with PCBs with high-density wiring and tiny components, this imprecise adjustment can easily lead to deviations in test results and affect the accurate assessment of PCB quality.

[0005] Secondly, the existing adjustment mechanisms are mostly limited to linear movement, ignoring the situation where test points may need to be approached from different angles on some complex PCB layouts, that is, lack of rotation adjustment function. This limitation may cause the probe to fail to accurately reach the test point when facing special angles or non-standard test positions, thus affecting test coverage and efficiency.

[0006] Therefore, the main challenge faced by existing technologies in the pursuit of more efficient and accurate PCB electrical performance verification solutions is how to overcome the accuracy limitations of manual adjustment and introduce an adjustment mechanism that can flexibly adapt to various angles and size requirements without increasing the complexity of the operation, so as to fully meet the high standards of PCB testing accuracy and efficiency required by the modern electronic manufacturing industry. This provides an urgent need and broad research and development space for the development of a new generation of test probe equipment with high-precision and multi-dimensional adjustment capabilities. Utility Model Content

[0007] The utility model aims to provide a probe variable distance rotation mechanism to solve the problems in the prior art that the probe mechanism for manually adjusting the probe distance has low adjustment precision and cannot be rotated for adjustment.

[0008] In order to achieve the above-mentioned purpose of the utility model, an embodiment of the utility model provides a probe variable pitch rotation mechanism, comprising:

[0009] a turntable assembly that is drivably pivotable about its central axis;

[0010] A mounting unit, the mounting unit comprising a first mounting seat and a second mounting seat arranged opposite to each other along a first direction, the first direction being perpendicular to the central axis, the second mounting seat being connected to the turntable assembly, and the first mounting seat being movable relative to the turntable assembly;

[0011] The first driving device is arranged on one of the two mounting seats. The driving unit of the first driving device is connected to the other mounting seat. When the driving unit moves, the two mounting seats can move toward or away from each other in a first direction.

[0012] As a further improvement of an embodiment of the utility model, the mounting unit further includes a guide rail extending along a first direction, the guide rail is connected to the second mounting seat, the first mounting seat is slidably arranged on the guide rail, and the probe variable pitch rotation mechanism further includes a control member, which is used to control the movement of the drive unit, thereby controlling the distance between the two mounting seats in the first direction.

[0013] As a further improvement of one embodiment of the utility model, the driving unit includes a pivot rod extending along a first direction, an external thread is circumferentially provided on the outer circumference of the pivot rod, and the other mounting seat includes a connecting piece, a threaded hole matching the external thread is provided on the connecting piece, the pivot rod is passed through the threaded hole, and when the pivot rod rotates, the external thread moves in the threaded hole, thereby causing the two mounting seats to move toward or away from each other in the first direction.

[0014] As a further improvement of an embodiment of the utility model, the first driving device includes a mounting bracket, which is arranged on one of the mounting seats and has a first support wall and a second support wall spaced apart along the first direction, the connecting member has a matching portion located between the first support wall and the second support wall, the threaded hole is located on the matching portion, the pivot rod is sequentially passed through the first support wall and the threaded hole and is connected to the second support wall, and the pivot rod can pivot on the second support wall.

[0015] As a further improvement of an embodiment of the utility model, the first driving device also includes a guide rod, which is arranged parallel to the pivot rod and connected between the first support wall and the second support wall, and a guide hole is arranged on the matching portion, and the guide rod is inserted into the guide hole.

[0016] As a further improvement of an embodiment of the utility model, it further includes a second driving device, and the pivoting portion of the second driving device is connected to the turntable assembly from the central axis of the turntable assembly.

[0017] As a further improvement of an embodiment of the utility model, the turntable assembly includes a first turntable and a second turntable and a plurality of columns arranged from top to bottom, the first turntable and the second turntable are coaxially arranged, the plurality of columns are connected between the first turntable and the second turntable, the pivot portion is connected to the turntable from the central axis of the first turntable, and the second mounting seat is connected to the lower end of the second turntable.

[0018] As a further improvement of an embodiment of the utility model, the probe variable pitch rotation mechanism also includes a first displacement detection device, which is arranged between the first turntable and the second turntable, and the second turntable is provided with a long avoidance hole extending along the first direction, and the first mounting seat includes a positioning member, which is passed through the long avoidance hole and can move in the long avoidance hole along the first direction, and the first displacement detection device is used to detect the moving distance of the positioning member in the first direction.

[0019] As a further improvement of an embodiment of the utility model, the first mounting seat includes a first support and a first fixed seat arranged on the first support, the position of the first fixed seat relative to the first support in a second direction is adjustable, the second direction is parallel to the central axis of the turntable assembly, the second mounting seat includes a second support and a second fixed seat arranged on the second support, the second support is connected to the lower end of the second turntable, and the position of the second fixed seat relative to the second support in the second direction is adjustable.

[0020] As a further improvement of an embodiment of the utility model, the probe variable pitch rotation mechanism also includes a second displacement detection device, which is arranged between the first turntable and the second turntable, and an observation hole is arranged on the second turntable at a position above the first support and / or the second support, and the second detection device is used to detect the distance moved by the first support and / or the second support in the second direction through the observation hole.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] The second mounting seat is connected to the turntable assembly and can rotate with the rotation of the turntable assembly, thereby driving the first mounting seat connected to the second mounting seat through the first driving device to rotate, thereby realizing rotation adjustment; when the driving unit moves, the two mounting seats can be made to move toward or away from each other in the first direction, and the control component controls the movement amplitude of the driving unit to precisely control the opening and closing accuracy of the two mounting seats. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of a probe variable pitch rotation mechanism provided by an embodiment of the utility model;

[0024] Figure 2 for Figure 1 The main view;

[0025] Figure 3 for Figure 1 A schematic diagram of the structure of the middle installation unit cooperating with the first driving device;

[0026] Figure 4 for Figure 3 A schematic diagram of the structure in which the first driving device cooperates with the connecting member;

[0027] Figure 5 for Figure 4 Schematic diagram of explosion structure in ;

[0028] Figure 6 for Figure 1 A schematic diagram of the structure of the middle turntable assembly;

[0029] Figure 7 for Figure 1 A schematic diagram of a structure in which a first probe is installed on a first mounting seat;

[0030] Figure 8 for Figure 1 Schematic diagram of the structure in which the second mounting seat is installed with the second probe.

[0031] The above description of the drawings includes the following reference numerals:

[0032] 1. Turntable assembly; 11. First turntable; 111. Mounting hole; 12. Second turntable; 121. Long avoidance hole; 122. Observation hole; 13. Column;

[0033] 2. Mounting unit; 21. First mounting seat; 211. Positioning member; 212. First support seat; 213. First fixing seat; 22. Second mounting seat; 221. Connecting member; 2211. Threaded hole; 2212. Matching portion; 2213. Guide hole; 222. Second support seat; 223. Second fixing seat; 23. Guide rail;

[0034] 3. First driving device; 31. Driving unit; 311. Pivoting rod; 32. Machine body; 33. Mounting bracket; 331. First supporting wall; 332. Second supporting wall; 34. Guide rod;

[0035] 4. Second driving device; 41. Pivoting portion;

[0036] 5. First displacement monitoring device; 6. Second displacement monitoring device; 71. First probe; 72. Second probe; A1. First direction; A2. Second direction. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0039] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0040] In order to solve the problem that the probe mechanism for manually adjusting the probe distance in the prior art has low adjustment precision and cannot be adjusted by rotation, the utility model provides a probe variable distance rotation mechanism.

[0041] refer to Figure 1-8 As shown, a probe variable pitch rotation mechanism provided by an embodiment of the utility model includes a turntable assembly 1, a mounting unit 2, and a first driving device 3.

[0042] Specifically, the turntable assembly 1 can be driven to pivot about its central axis;

[0043] The mounting unit 2 comprises a first mounting seat 21 and a second mounting seat 22 which are arranged opposite to each other along a first direction A1, wherein the first direction A1 is perpendicular to the central axis, the second mounting seat 22 is connected to the turntable assembly 1, and the first mounting seat 21 can move relative to the turntable assembly 1;

[0044] The first driving device 3 is disposed on one of the two mounting seats, and the driving unit 31 of the first driving device 3 is connected to the other mounting seat. When the driving unit 31 moves, the two mounting seats can move toward or away from each other in the first direction A1.

[0045] As a preferred embodiment, in this embodiment, the first drive device 3 is installed on the first mounting seat 21, and the drive unit 31 is connected to the second mounting seat 22. However, it should be noted that those skilled in the art can imagine that the first drive device 3 is arranged on the second mounting seat 22, and the drive unit 31 is connected to the first mounting seat 21, which can also meet the functional requirements of the present utility model. All solutions that adopt the same or similar embodiments as this embodiment should be included in the protection scope of the present utility model.

[0046] It can be understood that, through the above arrangement, the second mounting seat 22 is connected to the turntable assembly 1, and can rotate along with the rotation of the turntable assembly 1, thereby driving the first mounting seat 21 connected to the second mounting seat 22 through the first driving device 3 to rotate, thereby realizing rotation adjustment; when the driving unit 31 moves, the two mounting seats can be made to move toward or away from each other in the first direction A1, and controlling the movement amplitude of the driving unit 31 can precisely control the opening and closing accuracy of the two mounting seats.

[0047] In the utility model, the driving unit 31 and a mounting seat connected thereto can be threaded transmission, and the driving unit 31 and a mounting seat connected thereto can convert threaded motion into linear motion through threaded transmission, so that a mounting seat connected to the driving unit 31 can move relative to another mounting seat in a first direction A1, thereby realizing the two mounting seats moving toward or away from each other in the first direction A1.

[0048] Of course, in the present invention, the driving unit 31 can also be configured to be capable of telescopic movement in the first direction A1, so that a mounting seat connected to the driving unit 31 can move relative to another mounting seat in the first direction A1, thereby realizing the two mounting seats moving toward or away from each other in the first direction A1. The present invention does not limit the transmission method between the driving unit 31 and the mounting seat connected thereto, and those skilled in the art can make settings according to actual needs.

[0049] It should be noted that when the driving unit 31 moves, the two mounting seats can move toward or away from each other in the first direction A1. For example, the first driving device 3 is arranged on the first mounting seat 21, and the driving unit 31 is connected to the second mounting seat 22, and the second mounting seat 22 itself is fixedly connected to the turntable assembly 1. When the driving unit 31 moves, the second mounting seat 22 connected to the driving unit 31 does not move, and the first mounting seat 21 provided with the first driving device 3 can move toward or away from the second mounting seat 22 in the first direction A1 due to the action force and the reaction force; of course, the first driving device 3 can also be arranged on the second mounting seat 22, and the driving unit 31 is connected to the first mounting seat 21. Then, when the driving unit 31 moves, the first mounting seat 21 connected to the driving unit 31 can move toward or away from the second mounting seat 22 in the first direction A1. In the present utility model, there is no restriction on whether the first driving device 3 is arranged on the first mounting seat 21 or the second mounting seat 22, and those skilled in the art can set it according to actual needs. All solutions that are the same or similar to this embodiment are included in the protection scope of this utility model. Figure 1-3 As shown, it can be understood that in this embodiment, the first driving device 3 is arranged on the first mounting seat 21.

[0050] Preferably, in this embodiment, reference Figure 1-2 As shown, the mounting unit 3 further includes a guide rail 23 extending along the first direction A1, the guide rail 23 is connected to the second mounting seat 22, the first mounting seat 21 is slidably arranged on the guide rail 23, and the main function of the guide rail 23 is to guide. When the driving unit 31 moves, the first mounting seat 21 can slide on the guide rail 23, thereby moving toward or away from the second mounting seat 22 in the first direction A1. When moving, the two mounting seats have good stability, which is conducive to controlling the accuracy of the two mounting seats when adjusting the distance in the first direction A1.

[0051] Furthermore, the probe variable pitch rotation mechanism may further include a control member (not shown in the figure), and the control member is used to control the movement of the driving unit 31, thereby controlling the distance between the two mounting seats in the first direction.

[0052] Specifically, when the driving unit 31 and the mounting seat connected thereto realize threaded transmission, the control component can control the number of revolutions of the driving unit 31 , thereby controlling the distance between the two mounting seats in the first direction A1 .

[0053] When the driving unit 31 cooperates with the mounting seat connected thereto through a linear transmission mechanism to achieve linear reciprocating motion of the two in the first direction A1, the control component controls the spacing between the two mounting seats in the first direction A1 by controlling the linear reciprocating displacement distance of the driving unit 31.

[0054] In some embodiments, the driving unit 31 includes a pivot rod 311 extending along the first direction A1, and an external thread is circumferentially provided on the outer circumference of the pivot rod 311. The other mounting seat includes a connecting piece connected to the pivot rod.

[0055] refer to Figure 3-5 As shown, in this embodiment, the mounting seat connected and matched with the pivot rod 311 is a second mounting seat 22, and the second mounting seat 22 includes a connecting member 221, and the connecting member 221 is provided with a threaded hole 2211 that matches the external thread. The pivot rod 311 is inserted into the threaded hole 2211. When the pivot rod 311 rotates, the external thread moves in the threaded hole 2211, thereby causing the two mounting seats to move toward or away from each other in the first direction A1.

[0056] Further, the first driving device 3 also includes a body 32 and a mounting bracket 33. The mounting bracket 33 is arranged on one of the mounting seats, that is, the first mounting seat 21 in this embodiment, and has a first support wall 331 and a second support wall 332 spaced apart along the first direction A1. The connecting member 221 has a matching portion 2212 located between the first support wall 331 and the second support wall 332. The threaded hole 2211 is located on the matching portion 2212. The pivot rod 311 is sequentially penetrated through the first support wall 331 and the threaded hole 2211 and connected to the second support wall 332. The pivot rod 311 can pivot on the second support wall 332. In this way, the threaded transmission of the pivot rod 311 and the matching portion 2212 can make the first mounting seat 21 and the second mounting seat 22 relatively close to or away from each other in the first direction A1, thereby adjusting the distance between the two mounting seats. Such a power mechanism has relatively high stability.

[0057] It should be noted that the body 32 can be fixed on the first support wall 331, and the pivot rod 311 is arranged on the body 32, and passes through the first support wall 331 and the matching part 2212 in sequence. It can be understood that the pivot rod 311 can move relative to the body 32, the first support wall 331, the second support wall 332 and the matching part 2212.

[0058] Preferably, reference Figure 4-5As shown, the first driving device 3 further includes a guide rod 34, which is arranged parallel to the pivot rod 311 and connected between the first supporting wall 331 and the second supporting wall 332. The matching portion 2212 is provided with a guide hole 2213, and the guide rod 34 is passed through the guide hole 2213. In this way, the guide rod 34 can guide the movement of the matching portion 2212 in the first direction A1, and also plays a stabilizing role, thereby preventing the matching portion 2212 from shaking when moving in the first direction A1.

[0059] refer to Figure 2 As best shown in FIG. 1 , in this embodiment, the probe pitch-changing rotation mechanism further includes a second driving device 4, and a pivoting portion 41 of the second driving device 4 is connected to the turntable assembly 1 from the central axis of the turntable assembly 1. When the pivoting portion 41 pivots, the turntable assembly 1 can be driven to rotate. Thus, the second mounting seat 22 connected to the turntable assembly 1 and the first mounting seat 21 connected to the second mounting seat 22 via the first driving device 3 are driven to rotate. Thus, rotation adjustment is achieved.

[0060] Next reference Figure 6 As shown, the turntable assembly 1 includes a first turntable 61 and a second turntable 62, and a plurality of columns 63, which are arranged from top to bottom. The first turntable 61 and the second turntable 62 are coaxially arranged, and the plurality of columns 63 are connected between the first turntable 61 and the second turntable 62. The pivot portion 41 is connected to the turntable from the central axis of the first turntable 61. The first turntable 61 is provided with a mounting hole 111 along the central axis, and the pivot portion 41 is penetrated into the mounting hole 111.

[0061] The second mounting seat 22 is connected to the lower end of the second rotating disk 12. An installation space may be formed between the first rotating disk 11 and the second rotating disk 12, so that components such as control components may be placed.

[0062] Further, refer to Figure 1 , Figure 6 , Figure 7 As shown, the probe variable pitch rotation mechanism also includes a first displacement detection device 5, which is arranged between the first rotating disk 11 and the second rotating disk 12. The second rotating disk 12 is provided with a long avoidance hole 121 extending along the first direction. The first mounting seat includes a positioning member 211, which is passed through the long avoidance hole 121 and can move in the long avoidance hole 121 along the first direction A1. The first displacement detection device 5 is used to detect the moving distance of the positioning member 211 in the first direction A1. The first displacement detection device 5 can also feed back the detected moving distance to the control member.

[0063] Further, refer to Figure 1As shown in FIG. 7 , the first mounting seat 21 includes a first support 212 and a first fixed seat 213 arranged on the first support, a first probe 71 is installed on the first fixed seat 213, and the position of the first fixed seat 213 relative to the first support 212 in a second direction A2 is adjustable, and the second direction A2 is parallel to the central axis of the turntable assembly.

[0064] It should be noted that the positioning member 211 is connected to the first support 212 . In this embodiment, the first driving device 3 is also disposed on the first support 212 . The first support 212 is slidably disposed on the guide rail 23 .

[0065] Correspondingly, refer to Figure 1 8, the second mounting base 22 includes a second support 222 and a second fixing base 223 disposed on the second support, the second fixing base 223 is mounted with a second probe 72, the second support 222 is connected to the lower end of the second turntable 12, and the position of the second fixing base 223 relative to the second support 222 in the second direction A2 is adjustable. In this embodiment, the connecting member 221 and the guide rail 23 are disposed on the second support 222.

[0066] It should be noted that, in this embodiment, the needle head of the first probe 71 and the needle head of the second probe 72 are spaced apart in the first direction A1.

[0067] Furthermore, the probe variable pitch rotation mechanism also includes a second displacement detection device 6, which is arranged between the first turntable 11 and the second turntable 12. An observation hole 122 is arranged on the second turntable 12 at a position above the first support 212 and / or the second support 222. The second detection device 6 is used to detect the distance moved by the first support 212 and / or the second support 222 in the second direction A2 through the observation hole 122 to ensure that the adjustment of the first support 212 and / or the second support 222 meets production needs.

[0068] In summary, the embodiments of the present invention achieve the following technical effects:

[0069] Through the above arrangement, the second mounting seat 22 is connected to the turntable assembly 1, and can rotate along with the rotation of the turntable assembly 1, thereby driving the first mounting seat 21 connected to the second mounting seat 22 through the first driving device 3 to rotate, thereby realizing rotation adjustment; when the driving unit 31 moves, the two mounting seats can be made to move toward or away from each other in the first direction A1, and the control component controls the movement amplitude of the driving unit 31, thereby precisely controlling the opening and closing accuracy of the two mounting seats.

[0070] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0071] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0072] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0073] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A probe variable pitch rotation mechanism, characterized in that: include: a turntable assembly that is drivably pivotable about its central axis; A mounting unit, the mounting unit comprising a first mounting seat and a second mounting seat arranged opposite to each other along a first direction, the first direction being perpendicular to the central axis, the second mounting seat being connected to the turntable assembly, and the first mounting seat being movable relative to the turntable assembly; The first driving device is arranged on one of the two mounting seats. The driving unit of the first driving device is connected to the other mounting seat. When the driving unit moves, the two mounting seats can move toward or away from each other in a first direction.

2. The probe variable pitch rotation mechanism according to claim 1, characterized in that: The mounting unit also includes a guide rail extending along the first direction, the guide rail is connected to the second mounting seat, the first mounting seat is slidably set on the guide rail, and the probe variable pitch rotation mechanism also includes a control member, which is used to control the movement of the drive unit, thereby controlling the distance between the two mounting seats in the first direction.

3. The probe variable pitch rotation mechanism according to claim 1, characterized in that: The driving unit includes a pivot rod extending along a first direction, and an external thread is circumferentially provided on the outer circumference of the pivot rod. The other mounting seat includes a connecting piece, and a threaded hole matching the external thread is provided on the connecting piece. The pivot rod is inserted into the threaded hole. When the pivot rod rotates, the external thread moves in the threaded hole, thereby causing the two mounting seats to move toward or away from each other in the first direction.

4. The probe variable pitch rotation mechanism according to claim 3, characterized in that: The first driving device includes a mounting bracket, which is arranged on one of the mounting seats and has a first support wall and a second support wall spaced apart along the first direction. The connecting member has a matching portion located between the first support wall and the second support wall, and the threaded hole is located on the matching portion. The pivot rod is sequentially passed through the first support wall and the threaded hole and is connected to the second support wall, and the pivot rod can pivot on the second support wall.

5. The probe variable pitch rotation mechanism according to claim 4, characterized in that: The first driving device further includes a guide rod, which is arranged parallel to the pivot rod and connected between the first supporting wall and the second supporting wall. The matching portion is provided with a guide hole, and the guide rod is inserted into the guide hole.

6. The probe variable pitch rotation mechanism according to claim 1, characterized in that: It also includes a second driving device, wherein a pivoting portion of the second driving device is connected to the turntable assembly from the central axis of the turntable assembly.

7. The probe variable pitch rotation mechanism according to claim 6, characterized in that: The turntable assembly includes a first turntable and a second turntable and a plurality of columns arranged from top to bottom. The first turntable and the second turntable are coaxially arranged. The plurality of columns are connected between the first turntable and the second turntable. The pivot portion is connected to the turntable from the central axis of the first turntable. The second mounting seat is connected to the lower end of the second turntable.

8. The probe variable pitch rotation mechanism according to claim 7, characterized in that: The probe variable pitch rotation mechanism also includes a first displacement detection device, which is arranged between the first turntable and the second turntable. The second turntable is provided with a long avoidance hole extending along the first direction. The first mounting seat includes a positioning member, which is passed through the long avoidance hole and can move in the long avoidance hole along the first direction. The first displacement detection device is used to detect the movement distance of the positioning member in the first direction.

9. The probe variable pitch rotation mechanism according to claim 7, characterized in that: The first mounting seat includes a first support and a first fixed seat arranged on the first support, the position of the first fixed seat relative to the first support in a second direction is adjustable, the second direction is parallel to the central axis of the turntable assembly, the second mounting seat includes a second support and a second fixed seat arranged on the second support, the second support is connected to the lower end of the second turntable, and the position of the second fixed seat relative to the second support in the second direction is adjustable.

10. The probe variable pitch rotation mechanism according to claim 9, characterized in that: The probe variable pitch rotation mechanism also includes a second displacement detection device, which is arranged between the first turntable and the second turntable. An observation hole is arranged on the second turntable at a position above the first support and / or the second support. The second displacement detection device is used to detect the distance moved by the first support and / or the second support in the second direction through the observation hole.

Images