A floating centering connection structure for rotary switch testing
By dynamically compensating for knob position errors through a floating centering connection structure, the high precision requirements and automation challenges of traditional rotary switch testing are solved, achieving fully automated testing and improved efficiency.
Patent Information
- Application Number
- CN202522306275.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-10-31
AI Technical Summary
Traditional rotary switch testing methods have high requirements for knob position accuracy, which increases process costs. In addition, the tolerance adaptability of the knob test head is poor, which can easily damage the product and makes it difficult to achieve fully automated testing.
It adopts a floating centering connection structure, and drives the knob structure to rotate through a power source. By using the design of matching the knob blade with the inclined plane, it can dynamically compensate for the knob position error, protect the PCBA knob, and realize fully automatic testing.
It reduces the reliance on PCBA knob accuracy, improves testing efficiency, reduces manual operation intensity, and enables the automatic generation of test reports.
Smart Images
Figure CN224946053U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of electronic rotary switch testing technology, and in particular relates to a floating centering connection structure for rotary switch testing. Background Technology
[0002] Some electrical appliances have multi-position rotary switches on their control panels. Each position of the switch has a specific function, which requires the PCBA to verify the function of each position of the rotary switch before assembly to ensure that all positions function correctly. This creates the requirement to toggle the rotary switch positions.
[0003] Currently, traditional testing methods, when testing a small number of samples, rely on manually rotating a rotary switch to the corresponding position to verify functionality. Of course, automated testing structures for large-scale testing also exist. The main current approach involves designing a corresponding actuation mechanism based on the theoretical position of the rotary switch, with the actuation angle controlled by a servo motor. The problem with this method is: 1. Because the planar position of a rotary switch is fixed according to a theoretical position, the SMT positional accuracy requirements for the knob of the product under test are high. However, this positional accuracy requirement only affects the functional testing stage and does not affect the overall function of the product, thus significantly increasing the product manufacturing cost.
[0004] 2. The tolerance of the knob test head can only be accommodated by controlling the gap between the test head and the knob, but this gap is limited. Moreover, the gap will affect the rotation accuracy during the rotation process.
[0005] 3. There is a risk of damaging the product if the position of the rotary switch under test is out of tolerance. Utility Model Content
[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A floating centering connection structure for rotary switch testing includes a power source and a knob structure fixedly connected to the power source, wherein the power source can drive the knob structure to rotate. The knob structure includes a drive shaft and a bushing. The drive shaft and the bushing are detachably connected. The bushing is a cavity. Inside the cavity are a knob blade, a connecting shaft, and an elastic element. The knob blade is movably connected to the connecting shaft. One end of the elastic element abuts against the drive shaft, and the other end abuts against the connecting shaft. The cavity has an inwardly inclined slope on the side away from the drive shaft. The circumferential surface of the knob blade matches the inclined surface.
[0007] Furthermore, the drive shaft is provided with a drive end connected to the power source and a fixed end connected to the bushing, and the fixed end is provided with at least two sets of first U-shaped grooves.
[0008] Furthermore, the connecting shaft is provided with a first protrusion and a second protrusion, the first protrusion matching the first U-shaped groove, and the first protrusion being placed inside the first U-shaped groove.
[0009] Furthermore, the knob knife is provided with a second U-shaped groove and a blade head. The second U-shaped groove matches the second protrusion, and the second protrusion is placed in the second U-shaped groove. The blade head is used to turn the rotary switch to be tested.
[0010] Furthermore, the cavity inside the bushing is divided into a first cavity, a second cavity, a third cavity, and a fourth cavity. The first cavity is used to connect and fix with the fixed end, the second cavity is used to accommodate the connecting shaft, the third cavity is used to limit the knob knife, and the fourth cavity is used to prevent the knife head from escaping.
[0011] Furthermore, the fixed end of the drive shaft connected to the bushing is also provided with a screw hole.
[0012] Furthermore, the material of the knob knife is the same as that of the knob switch to be tested.
[0013] The beneficial effects of this utility model are: This invention employs a floating connection structure to address knob positional deviations. When the knob cutting head exceeds the knob's positional accuracy, it is lifted during the downward insertion of the cutting head into the knob, thus protecting the PCBA knob. Furthermore, during rotation, any discrepancies between the knob's position and the theoretical position can be dynamically compensated for by the floating connection structure. This reduces the reliance of testing on the precision of the PCBA soldering knobs, transforming manual testing into fully automated testing, improving testing efficiency, reducing operator workload, and, in conjunction with an automatic testing program, enabling automatic generation of test reports. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional schematic diagram of the knob structure of this utility model; Figure 3This is a schematic diagram of the drive shaft of this utility model; Figure 4 This is a schematic diagram of the connecting shaft of this utility model; Figure 5 This is a schematic diagram of the knob knife of this utility model; Figure 6 This is a cross-sectional schematic diagram of the bushing of this utility model; Explanation of reference numerals in the attached figures: 1. Power source; 2. Knob structure; 21. Drive shaft; 211. Drive end; 212. Fixed end; 213. First U-shaped groove; 22. Elastic element; 23. Connecting shaft; 231. First protrusion; 232. Second protrusion; 24. Knob knife; 241. Knife head; 242. Second U-shaped groove; 25. Bushing; 251. First cavity; 252. Second cavity; 253. Third cavity; 254. Fourth cavity; 255. Screw hole. Detailed Implementation
[0016] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention. Specific Implementation Example 1: like Figures 1-6 As shown, a floating centering connection structure for rotary switch testing includes a power source 1 and a knob structure 2 fixedly connected to the power source 1. The power source 1 can drive the knob structure 2 to rotate. The knob structure 2 includes a drive shaft 21 and a bushing 25, which are detachably connected. The bushing 25 is a cavity containing a knob blade 24, a connecting shaft 23, and an elastic element 22. The knob blade 24 is movably connected to the connecting shaft 23. One end of the elastic element 22 abuts against the drive shaft 21, and the other end abuts against the connecting shaft 23. The cavity has an inwardly inclined slope on the side away from the drive shaft 21, and the circumferential surface of the knob blade 24 matches the inclined slope. Specifically, the drive shaft 21 has a drive end 211 connected to the power source 1 and a fixed end 212 connected to the bushing 25. The fixed end 212 has at least two sets of first U-shaped grooves 213. The fixed end 212 connecting the drive shaft 21 and the bushing 25 also has screw holes 255.
[0018] Of course, the connecting shaft 23 is provided with a first protrusion 231 and a second protrusion 232. The first protrusion 231 matches the first U-shaped groove 213 and is placed inside the first U-shaped groove 213.
[0019] Preferably, the knob cutter 24 has a second U-shaped groove 242 and a cutting head 241. The second U-shaped groove 242 matches the second protrusion 232, and the second protrusion 232 is placed inside the second U-shaped groove 242. The cutting head 241 is used to turn the rotary switch to be tested. To avoid damaging the knob, the knob cutter 24 is made of the same material as the rotary switch to be tested.
[0020] Specifically, the cavity inside the bushing 25 is divided into a first cavity 251, a second cavity 252, a third cavity 253, and a fourth cavity 254. The first cavity 251 is used to connect and fix with the fixed end 212, the second cavity 252 is used to accommodate the connecting shaft 23, the third cavity 253 is used to limit the knob knife 24, and the fourth cavity 254 is used to prevent the air from entering the knife head 241.
[0021] When the knob-shaped cutter head is not in contact with the PCBA test knob, the overall state of the components is as follows: the drive shaft and the connecting shaft are in contact and concentric, the spring is in a compressed state, the spring provides a downward force, and the knob-shaped cutter head is pulled downward, while ensuring that the drive shaft, knob-shaped cutter head, and connecting shaft are concentric.
[0022] At the instant the knob blade makes contact with the PCBA test knob: the knob blade and the third cavity are displaced, the knob blade moves upward, at this time the knob blade and the bushing form a lateral gap, the knob blade and the connecting shaft are displaced to the left or right, because the tip of the knob corresponding to the blade has a special chamfer, the knob corresponding to the blade gradually inserts into the PCBA test knob.
[0023] As the knob blade inserts into the PCBA test knob, the connecting shaft moves upward under the force, further compressing the spring. During this compression, the connecting shaft and the drive shaft are displaced forward or backward. Then, the knob blade inserts into the PCBA test knob to perform the PCBA knob test.
[0024] The knob corresponds to the cutter head fully inserted into the PCBA test knob: The power source provides a rotational force to the connecting shaft, which in turn drives the knob cutter head, and consequently, the PCBA test knob. The angle of the knob cutter head is controlled by the start and stop of the power source to test the quality of the PCBA knob.
[0025] At the instant the knob-shaped cutter head separates from the PCBA test knob: Due to the spring compression, it needs to return to its original position. Under the force, the connecting shaft moves downwards, causing displacement of the connecting shaft and drive shaft forward or backwards. The knob-shaped cutter head moves downwards, and displacement of the knob-shaped cutter head and connecting shaft to the left or right occurs. Sliding friction occurs between the knob-shaped cutter head and the third cavity, causing the knob-shaped cutter head to return to its original position.
[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A floating centering connection structure for rotary switch testing, characterized in that: It includes a power source (1) and a knob structure (2) fixedly connected to the power source (1), wherein the power source (1) can drive the knob structure (2) to rotate; The knob structure (2) includes a drive shaft (21) and a bushing (25). The drive shaft (21) and the bushing (25) are detachably connected. The bushing (25) is a cavity. The cavity contains a knob blade (24), a connecting shaft (23), and an elastic element (22). The knob blade (24) is movably connected to the connecting shaft (23). One end of the elastic element (22) abuts against the drive shaft (21), and the other end abuts against the connecting shaft (23). The cavity has an inwardly inclined slope on the side away from the drive shaft (21). The circumferential surface of the knob blade (24) matches the inclined surface.
2. The floating centering connection structure for rotary switch testing according to claim 1, characterized in that: The drive shaft (21) is provided with a drive end (211) connected to the power source (1) and a fixed end (212) connected to the bushing (25). The fixed end (212) is provided with at least two sets of first U-shaped grooves (213).
3. The floating centering connection structure for rotary switch testing according to claim 2, characterized in that: The connecting shaft (23) is provided with a first protrusion (231) and a second protrusion (232). The first protrusion (231) matches the first U-shaped groove (213) and is placed inside the first U-shaped groove (213).
4. The floating centering connection structure for rotary switch testing according to claim 3, characterized in that: The knob knife (24) is provided with a second U-shaped groove (242) and a blade (241). The second U-shaped groove (242) matches the second protrusion (232). The second protrusion (232) is placed in the second U-shaped groove (242). The blade (241) is used to turn the rotary switch to be tested.
5. The floating centering connection structure for rotary switch testing according to claim 4, characterized in that: The cavity inside the bushing (25) is divided into a first cavity (251), a second cavity (252), a third cavity (253), and a fourth cavity (254). The first cavity (251) is used to connect and fix with the fixed end (212), the second cavity (252) is used to accommodate the connecting shaft (23), the third cavity (253) is used to limit the knob knife (24), and the fourth cavity (254) is used to prevent the air from entering the knife head (241).
6. The floating centering connection structure for rotary switch testing according to claim 1, characterized in that: The fixed end (212) connecting the drive shaft (21) and the bushing (25) is also provided with a screw hole (255).
7. The floating centering connection structure for rotary switch testing according to claim 1, characterized in that: The material of the knob knife (24) is the same as that of the knob switch to be tested.