Compact toroidal drive transformer with prevention of top cover tilting
By introducing positioning columns and limiting devices into the small toroidal drive transformer, the problem of top cover tilting was solved, ensuring the flatness and stability of the top cover and improving the product qualification rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU JINZHICHUAN ELECTRONICS
- Filing Date
- 2025-06-17
- Publication Date
- 2026-06-12
Smart Images
Figure CN224355071U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformer technology, and in particular to a small toroidal drive transformer that prevents the top cover from tilting. Background Technology
[0002] In a small toroidal drive transformer manufacturing process, the winding is first wound on the toroidal core, and then the base and cover plate are respectively glued to both sides of the toroidal core. However, because the winding coil is not flat, the top cover is prone to tilting, which makes the flatness of the top cover not meet the requirements and affects the product qualification rate. Utility Model Content
[0003] To address the problem that the flatness of the top cover in existing technical solutions does not meet the requirements, this utility model provides a small toroidal drive transformer to prevent the top cover from tilting.
[0004] This utility model provides the following technical solution: a small toroidal drive transformer for preventing the top cover from tilting, comprising:
[0005] The base is provided with a positioning post, and the positioning post is provided with a positioning through groove, the length of which is greater than the thickness of the base.
[0006] The top cover has a pin on the side facing the base that mates with the positioning slot, and the pin is equipped with a limiting device.
[0007] A ring-shaped magnetic core is sleeved on the positioning post, and a winding space is provided between the ring-shaped magnetic core and the positioning post, the top cover, and the base.
[0008] The winding includes a primary winding and a secondary winding wound on the toroidal core.
[0009] Preferably, the base has a groove on the side opposite to the top cover, the groove is connected to the positioning through groove, and the limiting device is disposed in the groove.
[0010] Preferably, the limiting device consists of two elastic protrusions symmetrical about the central axis of the pin, with a gap between the two elastic protrusions. A limiting cap is also provided at one end of the elastic protrusion that protrudes from the positioning groove. A stepped limiting part is formed between the limiting cap and the elastic protrusion, and the limiting cap is conical on the side away from the top cover.
[0011] Preferably, the limiting device is a fastening nut that is threadedly connected to the pin.
[0012] Preferably, the thickness of the annular magnetic core is 50-80% of the vertical distance between the top cover and the base.
[0013] The beneficial effects of this utility model are: the top cover is inserted into the positioning slot with a pin, the top cover is supported by the base, and the limiting device prevents the top cover from falling off the base; the annular magnetic core is sleeved on the positioning post, and sufficient winding space is reserved between the annular magnetic core and the base, top cover and positioning post to wind the winding, so as to avoid the top cover being affected by uneven winding, ensure the flatness of the top cover and improve the pass rate. Attached Figure Description
[0014] Figure 1 This is a side view of one embodiment of a transformer.
[0015] Figure 2 This is a cross-sectional view of one embodiment of a transformer.
[0016] Figure 3 This is a schematic diagram of one embodiment of the base.
[0017] Figure 4 This is a side view of one embodiment of the top cover.
[0018] Reference numerals: 11, base; 12, positioning post; 13, positioning slot; 14, groove; 21, top cover; 22, pin; 23, limiting device; 231, elastic protrusion; 232, gap; 233, limiting cap; 30, annular magnetic core. Detailed Implementation
[0019] The embodiments of this utility model will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement them after reading this specification. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.
[0020] This utility model provides, for example Figure 1 The small toroidal drive transformer shown includes a base 11, a top cover 21, an annular magnetic core 30 disposed between the base and the top cover, and a winding wound on the annular magnetic core 30.
[0021] Please refer to Figure 2 , 34. A positioning post 12 is provided on the side of the base 11 facing the top cover 21, and the positioning post 12 is provided with a positioning through groove 13. A pin 22 is provided on the side of the top cover 21 facing the base 11, which cooperates with the positioning through groove 13, and the pin 22 is provided with a limiting device 23 to prevent the top cover 21 from detaching from the base 11. The top cover 21 is inserted into the positioning through groove 13 by the pin 22, and the base 11 supports the top cover 21. The length of the positioning through groove 13 is greater than the thickness of the base 11, which enhances the stability of the assembly of the top cover 21 and the base 11 and controls the flatness. The limiting device 23 is also provided on the side of the base 11 away from the top cover 21. The groove 14 communicates with the positioning through groove 13. The limiting device 23 is located in the groove 14 to prevent the limiting device 23 from protruding from the base 11 and affecting the assembly of the base 11 with other components.
[0022] In this embodiment, the limiting device 23 consists of two elastic protrusions 231 symmetrical about the central axis of the pin. A limiting cap 233 is provided at one end of each elastic protrusion 231 protruding from the positioning groove 13. A stepped limiting portion is formed between the limiting cap 233 and the elastic protrusion 231, which can lock onto the end face of the positioning groove 13 to achieve a limiting function. A gap 232 is provided between the two elastic protrusions 231, allowing the elastic protrusions 231 to deform towards the gap 232 when the limiting device 23 is inserted into the positioning groove 13, thus allowing the limiting cap 233 to pass through the positioning groove 13. The limiting cap 233 is tapered on the side facing away from the top cover 21, facilitating its insertion into the positioning groove 13. In other embodiments, the limiting device can also be a fastening nut, with the end of the pin 22 protruding from the positioning groove 13 and threadedly connected to the fastening nut.
[0023] The annular magnetic core 30 is sleeved on the positioning post 12, and winding space is provided between the annular magnetic core 30 and the base 11, the positioning post 12, and the top cover 21 to wind the winding, ensuring that the top cover 21 does not contact the winding. Specifically, the thickness H1 of the annular magnetic core 30 is 50-80% of the vertical distance H2 between the top cover 21 and the base 11, leaving sufficient winding space.
[0024] The winding includes a primary winding and a secondary winding wound on the toroidal magnetic core 30, occupying the reserved winding space, and together with the toroidal magnetic core, they form a transformer. The winding method can be referred to relevant technologies.
[0025] The above describes one or more embodiments of this utility model in a relatively specific and detailed manner, but it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A small toroidal drive transformer for preventing top cover tilting, characterized in that, include: The base is provided with a positioning post, and the positioning post is provided with a positioning through groove, the length of which is greater than the thickness of the base. The top cover has a pin on the side facing the base that mates with the positioning slot, and the pin is equipped with a limiting device. A ring-shaped magnetic core is sleeved on the positioning post, and a winding space is provided between the ring-shaped magnetic core and the positioning post, the top cover, and the base. The winding includes a primary winding and a secondary winding wound on the toroidal core.
2. A small toroidal drive transformer for preventing top cover tilting according to claim 1, characterized in that, The base has a groove on the side away from the top cover, the groove is connected to the positioning through groove, and the limiting device is disposed in the groove.
3. A small toroidal drive transformer for preventing top cover tilting according to claim 1, characterized in that, The limiting device consists of two elastic protrusions symmetrical about the central axis of the pin, with a gap between the two elastic protrusions. A limiting cap is also provided at one end of the elastic protrusion that protrudes from the positioning groove. A stepped limiting part is formed between the limiting cap and the elastic protrusion, and the limiting cap is conical on the side away from the top cover.
4. A small toroidal drive transformer for preventing top cover tilting according to claim 1, characterized in that, The limiting device is a fastening nut that is threadedly connected to the pin.
5. A small toroidal drive transformer for preventing top cover tilting according to claim 1, characterized in that, The thickness of the annular magnetic core is 50-80% of the vertical distance between the top cover and the base.