Test fixture for patch separation type common-mode magnetic core
By designing a test fixture for patch-type separated common-mode cores, the problems of inductor assembly and testing complexity were solved, and the effects of simplifying operations and improving test accuracy were achieved.
Patent Information
- Application Number
- CN202421672518.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-07-16
AI Technical Summary
The assembly and testing process of existing SMD discrete common-mode inductors is complex, requires specialized equipment, and is cumbersome to operate. Furthermore, the inductors are small and difficult to clamp, affecting test accuracy and efficiency.
A test fixture consisting of an upper cover, an inductor assembly, a base, and a ejector head was designed. The inductor assembly is stably fixed through a combination slot and a wire lead-out slot, and the fit consistency is ensured by counterweights. The lifting and ejection mechanisms are combined to simplify the operation process.
The assembly and testing process of the inductor components is simplified, the test accuracy and efficiency are improved, human errors are reduced, and the operation difficulty is reduced.
Smart Images
Figure CN223346970U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of patch separation type common mode inductor testing, and in particular relates to a test fixture for a patch separation type common mode magnetic core. Background Art
[0002] Chip discrete common-mode inductors are mainly used to filter out common-mode signals, that is, to eliminate interference from non-head-mode signals from transmission lines. The inductor adopts a chip structure, making it easy to install and suitable for small electronic devices.
[0003] The working principle of the SMD discrete common-mode inductor is based on its special coil structure. The inductor consists of two or more coils, the coils are separated from each other, and have a common magnetic and electric coupling. This design can effectively filter out common-mode signals. Its structural characteristics make the magnetic flux path of the common-mode signal in the inductor longer, thereby improving the filtering effect.
[0004] The assembly of SMD discrete common-mode inductors requires dedicated equipment or jigs for winding, welding, gluing, and cover attaching, which is expensive, cumbersome, and time-consuming. Furthermore, due to the small size of SMD discrete common-mode inductors, the standard LCR bridge fixture cannot clamp the test pads, requiring a dedicated test box.
[0005] When dispensing glue and attaching the cover, the amount of glue dispensed and the state of the cover will directly affect the electrical characteristics of the inductor after assembly. Experienced professionals are required to operate and debug, which greatly reduces the practicality of the equipment. Utility Model Content
[0006] The purpose of the present invention is to provide a test fixture for a patch-type separated common-mode magnetic core, so as to solve the problems raised in the above-mentioned background technology.
[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a test fixture for a patch-type separated common-mode magnetic core, comprising: an upper cover, an inductor assembly and a base arranged in sequence from top to bottom, the top of the base being provided with a combination slot for accommodating the inductor assembly, the bottom of the upper cover being provided with a pin extending into the combination slot, the pin being used to confine the inductor assembly in the combination slot, and the outer side of the base being provided with a wire lead-out slot extending into the combination slot.
[0008] Preferably, a counterweight for redundant weighting is provided above the upper cover, and a placement slot for placing the counterweight is provided on the top of the upper cover.
[0009] Preferably, the bottom of the combination slot is further provided with an ejection mechanism for ejecting the inductor assembly, and one end of the ejection mechanism movably extends through and below the base.
[0010] Preferably, the ejection mechanism includes a supporting plate and a push block from top to bottom, the inductor component is arranged on the top of the supporting plate, and the push block is movably arranged through the bottom of the base.
[0011] Preferably, a paddle for lifting and lowering adjustment is provided on one side of the bottom end of the push block, and one end of the paddle extends to the outside of one side of the base.
[0012] Preferably, a lifting mechanism for driving the upper cover to move up and down is further provided on the outer wall of the base.
[0013] Preferably, the lifting mechanism includes a first mounting seat, a second mounting seat, a guide rod and an elastic member, the first mounting seat and the second mounting seat are respectively welded to the outer walls of the base and the upper cover, the bottom end of the guide rod is longitudinally mounted on the top of the first mounting seat, the second mounting seat is penetrated by a through hole mounted on the guide rod, the top of the guide rod is provided with a detachable plug, and the elastic member is arranged between the first mounting seat and the second mounting seat.
[0014] Preferably, the elastic member includes a spring, and the spring is sleeved on the guide rod.
[0015] Preferably, a groove is provided on the top of the base, and a convex disc inserted into the groove is provided on the bottom of the upper cover.
[0016] Preferably, the inductor assembly includes a cover plate and a magnetic core base which are sequentially arranged from top to bottom, and the magnetic core base is arranged on the top of the supporting plate.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] (1) The utility model completes the assembly of the inductor component by adding an upper cover, a top head, a base, a combination slot and a wire lead-out slot, and facilitates subsequent testing.
[0019] (2) The utility model ensures the consistency of each bonding by adding a counterweight on the upper cover, reducing the influence of magnetic leakage during bonding on the test results. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a front view of the utility model;
[0021] Figure 2 It is a cross-sectional view of the utility model;
[0022] Figure 3 This is a top view of the utility model when the upper cover and base are unfolded;
[0023] Figure 4 It is a three-dimensional diagram of the upper cover and the top head of the utility model;
[0024] In the figure: 1. Counterweight; 2. Upper cover; 3. Base; 4. Pick; 5. Push block; 6. Wire lead-out groove; 7. First mounting seat; 8. Spring; 9. Second mounting seat; 10. Guide rod; 11. Plug; 12. Head; 13. Boss; 14. Groove; 15. Support plate; 16. Core base; 17. Cover; 18. Through hole; 19. Combination slot; 20. Placement slot. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0026] refer to Figure 2-3 As shown, the utility model provides a test fixture for a patch separated common mode magnetic core, comprising: an upper cover 2, an inductor assembly and a base 3 arranged in sequence from top to bottom, a combination slot 19 for accommodating the inductor assembly is provided on the top of the base 3, a top head 12 extending into the combination slot 19 is provided at the bottom of the upper cover 2, the top head 12 is used to confine the inductor assembly in the combination slot 19, and a wire lead-out slot 6 extending into the combination slot 19 is provided on the outer side of the base 3.
[0027] Combine Figure 2 and Figure 4 As shown, a groove 14 is formed on the top of the base 3 , and a convex plate 13 is provided on the bottom of the upper cover 2 to be inserted into the groove 14 .
[0028] Combine Figure 2 As shown, the inductor assembly includes a cover plate 17 and a magnetic core base 16 which are sequentially arranged from top to bottom. The magnetic core base 16 is arranged on the top of the supporting plate 15 .
[0029] As described above, when using the upper cover 2, inductor assembly and base 3 provided by the present invention, the magnetic core base 16 is placed in the combination slot 19, the wire is led out of the base 3 through the wire lead-out slot 6, and glue is applied to the magnetic core base 16. At this time, the cover 17 is placed on the top of the magnetic core base 16 in the combination slot 19, and the upper cover 2 is placed on the base 3. At this time, the top head 12 on the upper cover 2 is inserted into the combination slot 19, so that the cover 17 is stably pressed on the magnetic core base 16 through the top head 12.
[0030] In this utility model, combined with Figure 1-2 As shown, a counterweight 1 for redundant weight is provided above the upper cover 2 of this embodiment, and a placement slot 20 for placing the counterweight 1 is provided on the top of the upper cover 2.
[0031] As described above, when using the counterweight 1 provided by the present invention, the counterweight 1 can be stably placed on the top of the upper cover 2 through the placement groove 20, so that the cover plate 17 is pressed onto the magnetic core base 16 by the weight of the counterweight 1.
[0032] In this utility model, combined with Figure 1-2 As shown, the bottom of the combination slot 19 of this embodiment is further provided with an ejection mechanism for ejecting the inductor assembly, and one end of the ejection mechanism movably extends through and below the base 3 .
[0033] Combine Figure 2 As shown, the ejection mechanism includes a supporting plate 15 and a push block 5 from top to bottom. The inductor component is arranged on the top of the supporting plate 15, and the push block 5 is movably arranged through the bottom of the base 3.
[0034] As described above, when using the ejection mechanism provided by the present invention, after the inductor component is inspected, the push block 5 is pushed upward, driving the support plate 15 to eject the inductor component outward in the combination slot 19, making it easy to remove the inductor component from the combination slot 19.
[0035] Further, in order to facilitate the lifting and lowering adjustment of the push block 5, refer to Figure 2 As shown, a paddle 4 for adjusting the height of the push block 5 is provided on one side of the bottom end thereof, and one end of the paddle 4 extends to the outside of one side of the base 3. The paddle 4 facilitates the lifting and lowering of the push block 5, thereby facilitating the lifting and lowering of the support plate 15 in the combination slot 19, thereby facilitating the ejection of the inductor assembly in the combination slot 19.
[0036] In this utility model, combined with Figure 1-2 As shown, a lifting mechanism for driving the upper cover 2 to move up and down is further provided on the outer wall of the base 3 of this embodiment.
[0037] Combine Figure 1-2 As shown, the lifting mechanism includes a first mounting seat 7, a second mounting seat 9, a guide rod 10 and an elastic member. The first mounting seat 7 and the second mounting seat 9 are respectively welded to the outer walls of the base 3 and the upper cover 2. The bottom end of the guide rod 10 is longitudinally mounted on the top of the first mounting seat 7. The second mounting seat 9 is penetrated by a through hole 18 that is sleeved on the guide rod 10. A detachable plug 11 is provided on the top of the guide rod 10. The elastic member is arranged between the first mounting seat 7 and the second mounting seat 9.
[0038] As described above, when using the lifting mechanism provided by the present invention, the guide rod 10 in the lifting mechanism is installed between the base 3 and the upper cover 2 through the first mounting seat 7 and the second mounting seat 9. The upper cover 2 is lifted and installed above the base 3 by the elastic member. When the upper cover 2 is away from the base 3, the second mounting seat 9 is rotated on the guide rod 10 through the through hole 18, so that the upper cover 2 is away from the top of the base 3. At this time, it is convenient to place the inductor component into or take it out of the combination slot 19.
[0039] Further, in order to facilitate the lifting of the upper cover 2 on the base 3, refer to Figure 1-2 As shown, the elastic member includes a spring 8, which is mounted on a guide rod 10. When the upper cover is not under pressure, the elastic force of the spring 8 is released, thereby driving the second mounting seat 9 to rise on the side away from the first mounting seat 7, thereby facilitating the separation of the upper cover 2 from the base 3 and facilitating the removal of the inductor assembly in the combination slot 19.
[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A test fixture for a patch separated common mode magnetic core, characterized in that: include: From top to bottom, an upper cover (2), an inductor assembly and a base (3) are sequentially provided. The top of the base (3) is provided with a combination slot (19) for accommodating the inductor assembly. The bottom of the upper cover (2) is provided with a head (12) extending into the combination slot (19). The head (12) is used to confine the inductor assembly in the combination slot (19). The outer side of the base (3) is provided with a wire lead-out slot (6) extending into the combination slot (19).
2. The test fixture for a patch-type separated common-mode magnetic core according to claim 1, characterized in that: A counterweight (1) for use as a spare weight is also provided above the upper cover (2), and a placement slot (20) for placing the counterweight (1) is provided on the top of the upper cover (2).
3. The test fixture for a patch-type separated common-mode magnetic core according to claim 1, characterized in that: The bottom of the combined slot (19) is also provided with an ejection mechanism for ejecting the inductor assembly, and one end of the ejection mechanism movably extends through and below the base (3).
4. The test fixture for a patch-type separated common-mode magnetic core according to claim 3, characterized in that: The ejection mechanism comprises a supporting plate (15) and a push block (5) from top to bottom, the inductor component is arranged on the top of the supporting plate (15), and the push block (5) is movably arranged through the bottom of the base (3).
5. The test fixture for a patch-type separated common-mode magnetic core according to claim 4, characterized in that: A paddle (4) for lifting and lowering adjustment is provided on one side of the bottom end of the push block (5), and one end of the paddle (4) extends to the outside of one side of the base (3).
6. The test fixture for a patch-type separated common-mode magnetic core according to claim 1, characterized in that: A lifting mechanism for driving the upper cover (2) to move up and down is also provided on the outer wall of the base (3).
7. The test fixture for a patch-type separated common-mode magnetic core according to claim 6, characterized in that: The lifting mechanism comprises a first mounting seat (7), a second mounting seat (9), a guide rod (10) and an elastic member, wherein the first mounting seat (7) and the second mounting seat (9) are welded to the outer walls of the base (3) and the upper cover (2), respectively, the bottom end of the guide rod (10) is longitudinally mounted on the top of the first mounting seat (7), the second mounting seat (9) is penetrated by a through hole (18) which is sleeved on the guide rod (10), the top of the guide rod (10) is provided with a detachable plug (11), and the elastic member is arranged between the first mounting seat (7) and the second mounting seat (9).
8. The test fixture for a patch-type separated common-mode magnetic core according to claim 7, characterized in that: The elastic member comprises a spring (8), and the spring (8) is sleeved on the guide rod (10).
9. The test fixture for a patch-type separated common-mode magnetic core according to claim 1, characterized in that: The top of the base (3) is provided with a groove (14), and the bottom of the upper cover (2) is provided with a convex disc (13) inserted into the groove (14).
10. The test fixture for a patch-type separated common-mode magnetic core according to claim 4, characterized in that: The inductor assembly comprises a cover plate (17) and a magnetic core base (16) which are arranged in sequence from top to bottom, and the magnetic core base (16) is arranged on the top of the supporting plate (15).