A connection device and a testing equipment
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LCFC HEFEI ELECTRONICS TECH
- Filing Date
- 2025-05-27
- Publication Date
- 2026-06-30
AI Technical Summary
Traditional connection devices cannot adapt to threaded holes of different diameters, leading to connection failures and affecting the stability of mechanical and electrical connections.
Design a connecting device including two elastic arms, using the elastic force of the elastic arms to drive the second end to open to a predetermined distance, so that its thread matches the threaded hole of the workpiece to be connected, and achieves adaptive adjustment through elastic deformation.
It improves the applicability and ease of operation of the connection device, and can automatically adjust to adapt to threaded holes of different diameters, ensuring the stability of mechanical and electrical connections.
Smart Images
Figure CN224433062U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of testing equipment technology, and in particular to a connection device and testing equipment. Background Technology
[0002] Connecting devices are widely used in mechanical, electronic and other fields. They are usually used to achieve a fixed connection between two things. For example, in testing equipment, a connecting device is needed to connect to the workpiece to be connected in order to achieve a mechanical connection between the workpiece and the testing equipment, and further achieve an electrical connection through the mechanical connection.
[0003] In related technologies, the connecting components and the workpieces to be connected are usually connected by threads; however, since the threaded holes on the workpieces to be connected usually have different diameters, the connecting device cannot achieve threaded connection with threaded holes of different diameters, resulting in connection failure and thus making the connecting components less applicable.
[0004] Therefore, the relevant technologies urgently need to be improved to address the above problems. Utility Model Content
[0005] This application provides a connection device and a testing equipment to at least solve the above-mentioned problems in the related art.
[0006] To achieve the above objectives, this application provides the following technical solution: a connecting device, which includes two spring arms;
[0007] The first ends of the two spring arms are connected to each other, the second ends of the two spring arms are spaced apart and form free ends, and each second end is provided with threads on the outside;
[0008] When the connecting device is in a fixed state, each spring arm drives the second end to open to a predetermined distance through the released elastic force, so that the threads of the two second ends are adapted to the diameter of the threaded hole on the workpiece to be connected, and the two spring arms are threadedly connected to the threaded hole on the external workpiece to be connected through the threads of the second ends.
[0009] In one embodiment, the spring arm is made of an elastic material, and when the connecting device is in a fixed state, the spring arm drives the second end to open to a predetermined distance through the elastic force released by itself.
[0010] In one embodiment, the spring arm includes an elastic body, the first ends of the two spring arms are rotatably connected, the elastic body is disposed between the two spring arms, and the two ends of the elastic body are respectively connected to the corresponding spring arms;
[0011] When the connecting device is in a fixed state, the elastic arm is driven by the elastic force released by the elastic body to open the second end to a predetermined distance.
[0012] In one embodiment, the second end of the spring arm is made of an elastic material; when the connecting device is in a fixed state, the second end of the spring arm undergoes elastic deformation under the pressure of the hole wall of the threaded hole on the workpiece to be connected, so that the second end of the spring arm extends along the axial direction of the threaded hole, and the thread on the outer side of the second end engages with the thread of the threaded hole.
[0013] In one embodiment, the spring arm further includes a threaded post, which forms the second end of the spring arm. The threaded post has a fan-shaped cross-section, and its outer surface is set as an arc-shaped surface and is provided with threads.
[0014] In one embodiment, the connecting device further includes a handle, and the first ends of both spring arms are connected to the handle.
[0015] In one embodiment, the connecting device further includes a connecting ring, which is fixedly connected to the end of the handle opposite to the spring arm.
[0016] In one embodiment, the two spring arms are electrically connected to the connecting ring via a handle, and the electrical signal on the workpiece to be connected is transmitted sequentially to the spring arms, the handle and the connecting ring through the threaded hole.
[0017] In one embodiment, the two spring arms and the handle are an integral structure; or / and, the handle and the connecting ring are an integral structure.
[0018] In one embodiment, this application also provides a detection device, which includes the above-mentioned connecting device and is used to detect the electrical signal of the workpiece to be connected.
[0019] When the above-mentioned connecting device is used, firstly, the two spring arms are squeezed by external force (e.g., hand pressure) until they undergo elastic deformation, causing the free ends of the spring arms to retract inward so that they can extend into the threaded hole of the workpiece to be connected. Then, the external force is removed, and the spring arms release their stored elastic force, driving the free ends to expand outward a predetermined distance so that the threads on the free ends contact the inner wall of the threaded hole. Finally, the connecting device is tightened by external force so that the threads on the free ends bite into the internal threads of the threaded hole, generating a large frictional force to create a locking effect between the free ends and the threaded hole, thereby achieving a locking and fixing between the connecting device and the workpiece to be connected. In this way, the elastic force of the spring arms drives the second end to automatically open a predetermined distance so that the threads on the free ends can adapt to threaded holes of different diameters, allowing the connecting device to automatically adjust to accommodate threaded holes of different diameters, thereby improving the applicability and ease of operation of the connecting device.
[0020] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description
[0021] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of this application are illustrated in the drawings by way of example and not limitation, in which:
[0022] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.
[0023] Figure 1 A schematic diagram of the connection structure in an embodiment of this application is shown.
[0024] The labels in the diagram are as follows: 11, spring arm; 111, first end; 112, second end; 12, thread; 13, handle; 14, connecting ring. Detailed Implementation
[0025] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0026] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this application can be achieved, and this is not limited herein.
[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0028] In related technologies, connecting components are widely used in the mechanical and electronic fields to achieve fixed connections between workpieces. Traditional threaded connection devices, due to their fixed structure, cannot adapt to threaded holes of different diameters, leading to frequent connection failures between the testing equipment and the workpiece. For example, when the diameters of the threaded holes on the workpieces to be connected differ, a fixed-size connection device cannot effectively expand to match the larger diameter, nor can it contract to fit the smaller diameter, directly affecting the stability of signal transmission.
[0029] For example, in signal detection on a circuit board, the workpiece to be connected can be a computer circuit board, and the detection device can be a signal testing device.
[0030] It should be noted that in traditional circuit board signal testing, grounding is often achieved by using a grounding clip on the signal detection device or its probe to clamp onto the exposed copper surface of the grounding terminal on the edge of the circuit board or onto other metal casings. However, the location for the clip is often at the edge of the motherboard, resulting in a significant distance between the test signal point and the grounding point, leading to poor grounding performance. This method is unsuitable for tests with stringent grounding requirements. Alternatively, finding a solder pad or device pin with grounding properties near the signal test point and soldering the grounding wire to the test probe requires the device to be powered off, making it unsuitable for anytime, anywhere use. For scenarios where problems are difficult to replicate, it's impossible to measure signals promptly while keeping the motherboard powered on. Furthermore, this method presents a challenge to the tester's expertise; non-hardware professionals often lack soldering skills or may damage the motherboard during the soldering process.
[0031] To address the aforementioned issues, researchers discovered numerous threaded holes pre-drilled on the circuit board. These holes are used to secure various electronic components, and their location is closer to test signal points, meeting stringent testing requirements. However, due to the varying diameters of these threaded holes, a connection structure adaptable to different hole sizes is needed. Considering the property of elastic materials to recover their original shape after deformation, combining elastic deformation with a threaded structure could potentially allow for radial dimension adjustment of the connection port.
[0032] It should be noted that, in addition to the application scenarios mentioned above (i.e., application scenarios that have both mechanical and electrical connections), this application can also be applied to application scenarios that only require mechanical connections; this application does not limit the specific application scenarios.
[0033] In some embodiments, combined with Figure 1 The connecting device includes two spring arms 11. The first ends 111 of the two spring arms 11 are connected to each other, and the second ends 112 of the two spring arms 11 are spaced apart and form free ends. Each second end 112 has a thread 12 on its outer side. When the connecting device is in a fixed state, each spring arm 11 drives its second end 112 to open to a predetermined distance through the released elastic force, so that the threads 12 of the two second ends 112 are adapted to the diameter of the threaded hole on the external workpiece to be connected. The two spring arms 11 are connected to the threaded hole 12 on the workpiece to be connected through the threads 12 of their second ends 112. Figure 1 This is a schematic diagram of the connecting device.
[0034] When the above-mentioned connecting device is used, firstly, the two spring arms 11 are squeezed by external force (e.g., hand pressure) until they undergo elastic deformation, causing the free ends of the spring arms 11 to retract inward so that they can extend into the threaded hole of the workpiece to be connected. Then, the external force is removed, and the spring arms 11 release their stored elastic force, driving the free ends to expand outward a predetermined distance so that the threads 12 on the free ends contact the inner wall of the threaded hole. Finally, the connecting device is tightened by external force so that the threads 12 on the free ends bite into the internal threads of the threaded hole, generating a large frictional force to create a locking effect between the free ends and the threaded hole, thereby achieving a locking and fixing between the connecting device and the workpiece to be connected. In this way, the elastic force of the spring arms 11 drives the second end 112 to automatically open a predetermined distance so that the threads 12 on the free ends can adapt to threaded holes of different diameters, allowing the connecting device to automatically adjust to adapt to threaded holes of different diameters, thereby improving the applicability and ease of operation of the connecting device.
[0035] It is understandable that "predetermined" refers to the spacing between the two second ends 112 after adjustment according to the diameter of the threaded hole of the workpiece to be connected.
[0036] In some alternative embodiments, the spring arm 11 is made of an elastic material, and when the connecting device is in a fixed state, the spring arm 11 drives the second end 112 to open to a predetermined distance by the elastic force released by itself.
[0037] Thus, the elastic force generated by the elastic deformation of the spring arm 11 enables the adaptive adjustment of the free end spacing, allowing the connecting device to form a stable thread 12 connection with threaded holes of different diameters, significantly improving the applicability and assembly efficiency of the connecting device; moreover, the use of elastic material for the spring arm 11 reduces the complexity of the connecting device and simplifies its structure.
[0038] In some alternative embodiments, the spring arm 11 includes an elastic body (not shown), with the first ends 111 of the two spring arms 11 rotatably connected. The elastic body is disposed between the two spring arms 11, and its two ends are respectively connected to the corresponding spring arms 11. When the connecting device is in a fixed state, the second end 112 of the spring arm 11 is driven to open to a predetermined distance by the elastic force released by the elastic body. For example, the elastic body can be a V-shaped spring or a spring.
[0039] During operation, firstly, an external force is applied to the two spring arms 11. Under the pressure of this force, the two spring arms 11 rotate around the connecting axis, causing the two second ends 112 to approach each other and compress the elastic body between them. Then, the second ends 112 of the two spring arms 11 are inserted into the threaded hole. When the external force is removed, the elastic body releases its elastic force and drives the two spring arms 11 to rotate around the connecting axis, causing the two second ends 112 to open and press against the wall of the threaded hole. By tightening the connecting device, the threads 12 on the second ends 112 engage with the internal threads of the threaded hole, thus achieving locking and fixing between the connecting device and the workpiece to be connected. In this way, by independently setting the elastic body and the rotating connecting structure, the elastic body that generates the elastic force is separated from the spring arms 11, allowing for flexible adjustment of the elastic force and enabling the spring arms 11 to overcome material limitations. For example, in testing equipment, when the spring arms 11 need to be made of conductive materials, they are not limited by the requirement to use elastic materials.
[0040] Preferably, the first ends 111 of the two spring arms 11 are rotatably connected by a pivot, which can support the stable rotation of the two spring arms 11.
[0041] In some alternative embodiments, the spring arm 11 further includes a torsion spring (not shown). The first ends 111 of the two spring arms 11 are rotatably connected by a pivot. The torsion spring is sleeved on the pivot, and one end of the torsion spring is fixedly connected to one of the spring arms 11, while the other end of the torsion spring is fixedly connected to the other spring arm 11. Thus, this solution employs an independently configured elastic body and a rotatable connection structure, separating the torsion spring that generates the elastic force from the spring arm 11. This allows for flexible adjustment of the elastic force and helps the spring arm 11 overcome the limitations of material properties. For example, in a testing device, the spring arm 11 can be made of a conductive material without being limited by the requirement to use an elastic material.
[0042] It should be noted that the methods of generating the elastic force of the two spring arms 11 listed above are merely examples, and this application does not limit the specific methods of generating the elastic force of the two spring arms 11.
[0043] In some embodiments, the second end 112 of the spring arm 11 is made of an elastic material; when the connecting device is in a fixed state, the second end 112 of the spring arm 11 undergoes elastic deformation under the compression of the hole wall of the threaded hole on the workpiece to be connected, so that the second end 112 of the spring arm 11 extends along the axial direction of the threaded hole, and the thread 12 on the outer side of the second end 112 engages with the internal thread of the threaded hole. For example, the second end 112 of the spring arm 11 can be made of a copper-beryllium alloy or a copper-titanium alloy.
[0044] Thus, when the second end 112 is inserted into the threaded hole of the workpiece to be connected, the second end 112, under the action of elastic force, squeezes the hole wall of the threaded hole. At the same time, the hole wall also applies a reverse force to the thread 12 of the second end 112, so that the thread 12 of the second end 112 undergoes elastic deformation. During the deformation process, it gradually forms a helical meshing path with the internal thread of the threaded hole to better adapt to the internal thread of the threaded hole. This results in a larger contact area between the thread 12 of the second end 112 and the internal thread of the threaded hole, thereby improving the tightness of the engagement between the thread 12 of the second end 112 and the internal thread of the threaded hole. At the same time, during this process, the elastic deformation also allows the overall extension direction of the second end 112 to automatically adjust to be consistent with the axial direction of the threaded hole, so as to automatically compensate for the tilting deviation generated when the second end 112 opens, which is conducive to a tighter engagement between the thread 12 of the second end 112 and the internal thread of the threaded hole.
[0045] In some embodiments, combined with Figure 1 The spring arm 11 also includes a threaded post, which forms the second end 112 of the spring arm 11. The cross-sectional shape of the threaded post is fan-shaped, and the outer surface of the threaded post is set as an arc-shaped surface and is provided with a thread 12.
[0046] Thus, through the combined design of the fan-shaped cross section and the arc-shaped outer surface, the threaded column can maintain structural strength while having the ability to deform, which not only expands the range of adaptable hole diameters, but also improves the torsional resistance through the evenly distributed thread engagement.
[0047] Preferably, the central angle of the sector-shaped cross-section formed by the cross-section of the threaded column is 90°-270°. For example, the central angle can be 90°, 180° or 270°.
[0048] In some embodiments, combined with Figure 1 The connecting device also includes a handle 13, and the first ends 111 of the two spring arms 11 are connected to the handle 13. Thus, the handle 13 is a component for the tester to hold and operate. By turning the handle 13, the thread 12 of the second end 112 is made to engage with the internal thread of the threaded hole, and a final tight engagement is achieved.
[0049] Preferably, an insulating sleeve can be provided on the outer shell of the handle 13. For example, a rubber sleeve can be provided, which can ensure insulation performance while providing a good feel.
[0050] Preferably, the two spring arms 11 are symmetrically arranged about the center line of the handle 13.
[0051] In some embodiments, combined with Figure 1 The connecting device also includes a connecting ring 14, which is fixedly connected to the end of the handle 13 away from the spring arm 11.
[0052] Thus, in normal conditions, the connecting device can be directly hung on the hook of the testing equipment via the connecting ring 14. In the testing state, the connecting ring 14 can serve as a connection structure with the testing equipment. For example, the testing equipment can be connected to the connecting ring 14 via a grounding wire. The ring-shaped connecting ring 14 can form a more convenient overlapping structure.
[0053] In some embodiments, the two spring arms 11 are electrically connected to the connecting ring 14 via the handle 13. The electrical signal on the workpiece to be connected is transmitted sequentially to the spring arms 11, the handle 13, and the connecting ring 14 through the threaded hole. For example, the handle 13 and the connecting ring 14 can both be made of aluminum or copper.
[0054] Thus, when the second end 112 of the spring arm 11 is inserted into the threaded hole of the workpiece to be connected, the thread 12 on the outer side of the second end 112 engages with the internal thread of the threaded hole to form a physical fixation, while also forming an electrical contact. The electrical signal is transmitted from the threaded hole to the second end 112 of the spring arm 11, and then conducted through the conductive material of the spring arm 11 to the handle 13 connected to it. The handle 13 transmits the signal to the connecting ring 14 at its end through its own conductive path. Because of the robust connection structure between the spring arm 11 and the handle 13, and between the handle 13 and the connecting ring 14, stable electrical signal transmission is achieved.
[0055] Furthermore, since the spring arm 11 needs to be both elastic and have good electrical conductivity, it is made of copper-beryllium alloy or copper-titanium alloy.
[0056] In some embodiments, combined with Figure 1 The two spring arms 11 and the handle 13 are integrated into one piece; or / and the handle 13 and the connecting ring 14 are integrated into one piece. The integrated structure provides a more robust connection, facilitating a more stable electrical signal transmission path.
[0057] In some embodiments, this application also provides a testing device, which includes the connection device described above, and is used to detect the electrical signal of the workpiece to be connected. For example, the testing device can be an oscilloscope or a multimeter.
[0058] Thus, the adaptive adjustment capability of the spring arm 11 allows the testing equipment to directly adapt to threaded holes of different diameters, avoiding the need for frequent replacement of the connection structure. Furthermore, the contact surface formed by the thread 12 at the second end and the internal thread of the threaded hole simultaneously serves both mechanical fixing and electrical signal transmission functions, simplifying the complexity of the connection device and reducing the risk of poor contact introduced by additional conductive components.
[0059] Furthermore, the testing equipment is mechanically and electrically connected to the connecting ring 14 of the connecting device via a grounding wire.
[0060] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A connecting device, characterized in that, The connecting device includes two spring arms; The first ends of the two spring arms are connected to each other, the second ends of the two spring arms are spaced apart from each other and form free ends, and each second end is provided with a thread on the outside; When the connecting device is in a fixed state, each of the spring arms is driven by elastic force to open the second end to a predetermined distance so that the threads of the two second ends are adapted to the diameter of the threaded hole on the workpiece to be connected, and the two spring arms are threadedly connected to the threaded hole on the external workpiece to be connected through the threads of the second ends.
2. The connecting device according to claim 1, characterized in that, The spring arm is made of elastic material. When the connecting device is in a fixed state, the spring arm drives the second end to open to a predetermined distance through the elastic force it releases.
3. The connecting device according to claim 1, characterized in that, The spring arm includes an elastic body, the first ends of the two spring arms are rotatably connected, the elastic body is disposed between the two spring arms, and the two ends of the elastic body are respectively connected to the corresponding spring arms; When the connecting device is in a fixed state, the elastic arm drives the second end to open to a predetermined distance through the elastic force released by the elastic body.
4. The connecting device according to claim 1, characterized in that, The second end of the spring arm is made of an elastic material; when the connecting device is in a fixed state, the second end of the spring arm undergoes elastic deformation under the squeezing action of the hole wall of the threaded hole on the workpiece to be connected, so that the second end of the spring arm extends along the axial direction of the threaded hole, and the thread on the outer side of the second end engages with the thread of the threaded hole.
5. The connecting device according to claim 1, characterized in that, The spring arm also includes a threaded post, which forms the second end of the spring arm. The threaded post has a fan-shaped cross-section and its outer surface is an arc-shaped surface with the thread.
6. The connecting device according to claim 1, characterized in that, The connecting device also includes a handle, and the first ends of both spring arms are connected to the handle.
7. The connecting device according to claim 6, characterized in that, The connecting device further includes a connecting ring, which is fixedly connected to the end of the handle opposite to the spring arm.
8. The connecting device according to claim 7, characterized in that, The two spring arms are electrically connected to the connecting ring via the handle. The electrical signal on the workpiece to be connected is transmitted sequentially to the spring arm, the handle, and the connecting ring through the threaded hole.
9. The connecting device according to claim 7, characterized in that, The two spring arms and the handle are integrated into one structure; or / and the handle and the connecting ring are integrated into one structure.
10. A testing device, characterized in that, The detection device includes the connection device as described in any one of claims 1-9, and the detection device is used to detect the electrical signal of the workpiece to be connected.