Transformer framework capable of prolonging creepage distance and transformer

Abstract

The utility model provides a transformer framework and transformer capable of prolonging creepage distance, which comprises a framework main body, a first base and a second base are respectively arranged at two ends of the framework main body, and the length of the second base at least meets the length requirement of the creepage distance; the first base and the second base are each provided with a plurality of wiring grooves, and the wiring grooves extend from the ends close to the framework body to the ends away from the framework body. According to the utility model, the wiring channel is arranged on the base, and the lead-out winding wire is wired from the wiring channel, so that the risk that the winding wire is exposed outside and is worn is avoided. And the baffle is arranged above the wiring groove, so that the winding wire is prevented from being separated from the wiring groove due to shaking.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer skeletons, in particular to a transformer skeleton and a transformer with extended creepage distance. Background Art

[0002] The transformer frame is the main structural component of the transformer, fixing the transformer core and providing space for the copper wire in the transformer to be wound. The main components of the transformer frame include the frame body, which is used to wind the copper wire. The base is set at both ends of the frame body. The transformer pins set on the base are used to solder the transformer to the PCB board. The bases at both ends of the existing transformer are mostly symmetrical structures, such as Figure 1 As shown in the figure, 1 is the main frame and 5 is the base. This symmetrical transformer frame is not suitable for applications that require safety regulations due to insufficient creepage distance. In order to meet the creepage distance requirements of safety regulations, the prior art of Chinese patent application publication number CN205862975U improves the transformer frame by extending the length of one base to meet the creepage distance requirements. Figure 2 However, the extended base lengthens the distance from the bobbin to the transformer pins, increasing the exposed length of the lead wires. This can easily cause wear and tear on the exposed wires and other components, leading to transformer damage. Furthermore, the lead wires are arranged in a disorderly manner on the base surface, affecting the product's aesthetics. Utility Model Content

[0003] The utility model aims to provide a transformer frame and a transformer with extended creepage distance, which can solve the problem that exposed windings are prone to wear.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] In the first aspect, the utility model provides a transformer skeleton for extending the creepage distance, including a skeleton body 1, a first base 4 and a second base 5 are respectively provided at both ends of the skeleton body 1, and the length of the second base 5 at least meets the length requirement of the creepage distance; a plurality of wiring grooves 7 are respectively provided on the first base 4 and the second base 5, and the wiring grooves 7 extend from one end close to the skeleton body 1 to the end away from the skeleton 1.

[0006] Furthermore, the wiring groove 7 is provided on the upper surface of the first base 4 and the upper surface of the second base 5 , or is provided on the lower surface of the first base 4 and the lower surface of the second base 5 .

[0007] Furthermore, a baffle 71 is provided on the top of the wiring trough 7 , and the baffle 71 extends from the top of one side wall of the wiring trough 7 to the top of the other side wall.

[0008] Furthermore, a cover plate 8 is provided on one end of the wiring trough 7 away from the trough bottom.

[0009] Furthermore, the bottom surface of the wiring groove 7 is set to be an inclined surface, which gradually tilts downward from the end close to the skeleton body 1 to the end away from the skeleton body 1, or gradually tilts downward from the end close to the skeleton body 1 to the middle of the wiring groove 7, and then becomes a horizontal plane and extends all the way to the end of the wiring groove 7 away from the skeleton body 1.

[0010] Furthermore, magnetic core baffles 2 and 3 are respectively provided at both ends of the skeleton body 1 .

[0011] Furthermore, a pin 6 is provided on one end of the first base 4 away from the skeleton body 1 and one end of the second base 5 away from the skeleton body 1 , respectively.

[0012] Furthermore, the pin 6 is a straight pin or a seagull pin.

[0013] In the second aspect, the utility model provides a transformer, including the above-mentioned transformer skeleton, and also including at least a magnetic core, a primary winding and a secondary winding wound on the skeleton body 1; the magnetic core passes through the hollow part of the skeleton body 1; the winding wire of the primary winding is led out from the wiring groove 7 set on the first base 4, and welded to the pin 6 on the first base 4; the winding wire of the secondary winding is led out from the wiring groove 7 set on the second base 5, and welded to the pin 6 of the second base 5.

[0014] The utility model provides a transformer frame and transformer with extended creepage distance. A wiring trough is provided on the base, through which the lead-out winding wires are routed, thereby avoiding the risk of the winding wires being exposed and abraded. A baffle is provided above the wiring trough to prevent the winding wires from escaping from the wiring trough due to shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a symmetrical transformer skeleton in the prior art;

[0016] Figure 2 A schematic diagram of an asymmetrical transformer skeleton in the prior art;

[0017] Figure 3 This is a schematic diagram of a transformer skeleton with straight pins of the present invention;

[0018] Figure 4 This is a schematic diagram of the transformer skeleton with seagull-foot pins of the present invention;

[0019] Figure 5 This is a schematic diagram of the wiring trough of the utility model being arranged at the bottom of the base;

[0020] Figure 6This is a schematic diagram of a transformer skeleton with baffles provided in the present invention;

[0021] Figure 7 This is a schematic diagram of a transformer skeleton with a cover plate provided in the present invention;

[0022] Figure 8 This is a schematic diagram of the transformer skeleton with the cover plate of the utility model decomposed. DETAILED DESCRIPTION

[0023] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0024] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0025] The transformer skeleton with extended creepage distance of the utility model is as follows: Figures 3 to 8 As shown, the frame includes a main frame 1, with a first base 4 and a second base 5 disposed at each end. The length of the second base 5 at least meets the creepage distance requirement, which is a minimum of 16 mm in safety regulations. Several wiring troughs 7 are provided on each of the first and second bases 4, 5, extending from the end closest to the main frame 1 to the end further away from the main frame 1.

[0026] Magnetic core baffles 2 and 3 are respectively provided at both ends of the skeleton body 1. Pins 6 are respectively provided at one end of the first base 4 away from the skeleton body 1 and one end of the second base 5 away from the skeleton body 1.

[0027] When making a transformer, after the copper wire is wound on the skeleton body 1, the winding wire is led out from the skeleton body 1, routed along the wiring groove, extended to the pins 6 and welded to the pins 6. The first base 4 is the primary side of the transformer, and the second base 5 is the secondary side of the transformer. The transformer skeleton structure of the present invention has a wiring groove 7 provided on the base, so that the winding wire can be routed along the wiring groove, which not only avoids the wiring being too long and messy, affecting the appearance, but also helps to protect the lead wire from wear and tear, further ensuring the service life of the transformer. The number of wiring grooves on the first base 4 and the second base 5 can be the same or different, depending on the number of pins on the primary and secondary sides of the transformer.

[0028] The transformer bobbin of the present invention can be a direct plug-in bobbin (DIP) or a surface mount bobbin (SMD) depending on the pin shape. The accompanying drawings only show the schematic diagram of the structure of the surface mount bobbin, but this does not mean that the present invention cannot be applied to the direct plug-in bobbin. The pins can be straight pins, such as Figure 3 As shown, it can also be a seagull foot, such as Figure 4 shown.

[0029] Furthermore, the wiring groove 7 can be set on the upper surface of the base, such as Figure 3 As shown, it can also be set on the lower surface of the base, such as Figure 5 shown. Figure 5 The transformer frame is flipped over with the bottom facing up to facilitate understanding of the wiring trough arrangement. When the wiring trough 7 is arranged on the lower surface of the base, when the transformer is soldered to the PCB board, the lower surface of the base contacts the PCB board, thereby fixing the wiring in the wiring trough within the wiring trough range and preventing it from falling out of the wiring trough due to shaking.

[0030] When the wiring trough 7 is set on the upper surface of the base, the wiring may jump out of the wiring trough due to shaking or prolonged use. Therefore, a baffle 71 is further provided at the top of the wiring trough 7. The baffle 71 extends from the top of one side wall of the wiring trough 7 to the top of the other side wall. The baffle 71 effectively prevents the wiring from falling out of the wiring trough.

[0031] The present invention discloses another embodiment to prevent the wiring from being separated from the wiring trough, that is, a cover plate 8 is provided on the end of the wiring trough 7 away from the bottom of the trough, such as Figure 7 and Figure 8 The cover plate 8 can be arranged on a wiring trough with a baffle or on a wiring trough without a baffle.

[0032] Of course, if cost is not considered, when the wiring trough 7 is provided on the lower surface of the base, a baffle 71 and / or a cover 8 may also be provided.

[0033] Furthermore, in order to make the wiring fit more closely in the wiring groove during the process of leading the wiring from the skeleton body 1 to the pin 6, the bottom surface of the wiring groove 7 is set as an inclined surface, which gradually slopes downward from the end close to the skeleton body 1 to the end away from the skeleton body 1 (such as Figure 4 The middle of the wiring trough 7 may be any middle position, not necessarily the exact middle.

[0034] The utility model also discloses a transformer comprising the aforementioned transformer bobbin with extended creepage distance, and further comprising at least a magnetic core, a primary winding, and a secondary winding wound on a bobbin body 1. The magnetic core passes through the hollow portion of the bobbin body 1. The primary winding wire is led out through a wiring groove 7 provided on a first base 4 and welded to a pin on the first base 4. The secondary winding wire is led out through a wiring groove 7 provided on a second base 5 and welded to a pin on the second base 5.

[0035] In the description of the present invention, it should be understood that the terms "middle", "length", "upper", "lower", "front", "back", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In this utility model, unless otherwise expressly specified or limited, a first feature "on" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. "Several" means at least one. "Multiple" means at least two, for example, two, three, etc., unless otherwise expressly specified or limited.

[0037] The above is only for explaining the implementation mode of the present invention and is not intended to limit the present invention. For those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention without creative work should be included in the scope of protection of the present invention.

Claims

1. A transformer skeleton for extending creepage distance, comprising a skeleton body (1), a first base (4) and a second base (5) being respectively provided at both ends of the skeleton body (1), wherein the length of the second base (5) at least meets the length requirement of the creepage distance; characterized in that: A plurality of wiring grooves (7) are respectively provided on the first base (4) and the second base (5), and the wiring grooves (7) extend from an end close to the skeleton body (1) to an end away from the skeleton body (1).

2. The transformer bobbin with extended creepage distance according to claim 1, characterized in that: The wiring trough (7) is arranged on the upper surface of the first base (4) and the upper surface of the second base (5), or is arranged on the lower surface of the first base (4) and the lower surface of the second base (5).

3. The transformer bobbin with extended creepage distance according to claim 1, characterized in that: A baffle (71) is provided on the top of the wiring trough (7), and the baffle (71) extends from the top of one side wall of the wiring trough (7) to the top of the other side wall.

4. The transformer bobbin with extended creepage distance according to any one of claims 1 to 3, characterized in that: A cover plate (8) is provided on one end of the wiring trough (7) away from the trough bottom.

5. The transformer bobbin with extended creepage distance according to claim 1, characterized in that: The bottom surface of the wiring trough (7) is configured as an inclined surface, gradually tilting downward from the end close to the skeleton body (1) to the end away from the skeleton body (1), or gradually tilting downward from the end close to the skeleton body (1) to the middle of the wiring trough (7), and then becoming a horizontal surface extending all the way to the end of the wiring trough (7) away from the skeleton body (1).

6. The transformer bobbin with extended creepage distance according to claim 1, characterized in that: Magnetic core baffles are respectively provided at both ends of the skeleton body (1).

7. The transformer bobbin with extended creepage distance according to claim 1, characterized in that: One end of the first base (4) away from the skeleton body (1) and one end of the second base (5) away from the skeleton body (1) are respectively provided with pins (6).

8. The transformer bobbin with extended creepage distance according to claim 7, characterized in that: The pin (6) is a straight pin or a seagull pin.

9. A transformer, characterized in that: A transformer skeleton comprising the transformer skeleton according to any one of claims 1 to 8, further comprising at least a magnetic core, a primary winding and a secondary winding wound on the skeleton body (1); the magnetic core passes through the hollow portion of the skeleton body (1); the winding of the primary winding is led out from the wiring groove (7) provided on the first base (4) and welded to the pin (6) of the first base (4); the winding of the secondary winding is led out from the wiring groove (7) provided on the second base (5) and welded to the pin (6) of the second base (5).

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