Surface-mounted transformer

Abstract

The utility model discloses a surface mount transformer which comprises an insulation base, a first magnetic core, a second magnetic core, an insulation reel, an annular coil winding, a welding pin and an elastic fixing piece, the insulation base is arranged on the first magnetic core, a first core tube is arranged in a first through hole in a penetrating mode, the second magnetic core covers the first magnetic core, and a second core tube is arranged in a second through hole in a penetrating mode. The first core tube and the second core tube are respectively embedded in the second through holes, the annular coil winding is sleeved on the insulation winding frame, the welding pins are respectively arranged on the side wall of the supporting plate side by side, two ends of the elastic fixing piece are respectively provided with an elastic clamping hook arm, and the elastic fixing piece is arranged at the upper end portion of the second magnetic core. The lower end portions of the elastic clamping hook arms abut against the lower end walls of the two ends of the first magnetic core respectively, and the inner top wall of the upper end portion of the elastic fixing piece abuts against the upper end wall of the second magnetic core. According to the technical scheme, the transformer can be assembled more conveniently and quickly and is convenient to disassemble and maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field, especially surface mount transformer. BACKGROUND

[0002] The transformer is the device that changes AC voltage using the principle of electromagnetic induction, and the main components are primary coil, secondary coil and iron core (magnetic core). Main functions include: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer) and the like.

[0003] The transformer can be divided into distribution transformer, power transformer, fully sealed transformer, combined transformer, dry-type transformer, oil-immersed transformer, single-phase transformer, electric furnace transformer, rectifier transformer, electric reactor, anti-interference transformer, lightning protection transformer, box-type transformer, test transformer, corner transformer, large current transformer, excitation transformer and the like according to use.

[0004] At present, the traditional coil transformer is mostly fixed with the iron core through the way of adhesive tape binding in the assembling process, which is complicated to operate, low in efficiency and inconvenient for assembling and maintenance. UTILITY MODEL CONTENT

[0005] The utility model discloses a surface mount transformer, which aims at solving the technical problems of the existing coil transformer, such as complicated operation, low efficiency and inconvenience for assembling and maintenance.

[0006] In order to achieve the above object, the utility model discloses surface mount transformer, including insulating base, first magnetic core, second magnetic core, insulating bobbin, annular coil winding, welding pin and elastic fixing piece, the appearance of first magnetic core and second magnetic core all is E type structure setting, the inside wall of first magnetic core and second magnetic core respectively protrude a first core pipe and second core pipe in the middle, the insulating base is set up on first magnetic core, the middle recess of insulating base has first through -hole, first core pipe is set up in first through -hole, second magnetic core cover is set up on first magnetic core, the middle of insulating bobbin is equipped with second through -hole, first core pipe and second core pipe are respectively embedded in second through -hole, annular coil winding is covered on insulating bobbin, the both sides of insulating base are set up in a support plate, the appearance of welding pin all is Z type structure setting, welding pin is set up on the side wall of support plate side by side respectively, the appearance of elastic fixing piece is U type structure setting, the both ends of elastic fixing piece are equipped with a elastic hook arm respectively, the elastic fixing piece is set up on the upper end of second magnetic core, and the lower end of elastic hook arm is respectively with the lower end wall of the both ends of first magnetic core abuts, the inner top wall of the upper end of elastic fixing piece and the upper end wall of second magnetic core abut, welding pin is electrically connected with annular coil winding respectively.

[0007] Optionally, the upper end of the insulating bobbin is protruded with a limiting flange in the circumferential direction, and the upper end of the annular coil winding abuts against the lower end wall of the limiting flange.

[0008] Optionally, the side wall of the support plate is recessed with a plurality of insertion grooves in the length direction, and the upper ends of the welding pins are embedded in the insertion grooves respectively.

[0009] Optionally, the upper end of the elastic fixing piece is provided in a concave circular arc curved surface structure.

[0010] Optionally, the side wall of the support plate is provided with a slope, and the slope is recessed with a plurality of wire grooves.

[0011] Optionally, the first magnetic core and the second magnetic core are both formed of Mn-Zn soft magnetic ferrite material.

[0012] Optionally, the insulating base and the insulating bobbin are both formed of bakelite or flame-retardant nylon or flame-retardant PET plastic or flame-retardant PBT plastic or liquid crystal polymer material.

[0013] Optionally, the elastic fixing piece is formed of aluminum alloy or iron alloy or stainless steel material.

[0014] Optionally, the welding pin is formed of copper or copper alloy material.

[0015] The technical scheme of the surface-mount transformer has the following beneficial effects: the first core pipe and the second core pipe are respectively arranged on the inner side wall of the first magnetic core and the second magnetic core, the insulating base is arranged on the first magnetic core, the first through hole is arranged in the middle of the insulating base, the first core pipe is arranged in the first through hole, the second magnetic core cover is arranged on the first magnetic core, the second through hole is arranged in the middle of the insulating bobbin, the first core pipe and the second core pipe are respectively arranged in the second through hole, the annular coil winding is arranged on the insulating bobbin, the two sides of the insulating base are respectively arranged on the support plates, the welding pins are arranged on the side walls of the support plates in parallel, the elastic fixing member is arranged on the upper end of the second magnetic core, the lower end of the elastic hook arm is in abutment with the lower end wall of the two ends of the first magnetic core, the inner top wall of the upper end of the elastic fixing member is in abutment with the upper end wall of the second magnetic core, and the welding pins are electrically connected with the annular coil winding, so that the assembly of the transformer is more convenient and fast, and the transformer is convenient to disassemble and maintain, compared with the traditional coil winding transformer, the surface-mount transformer has the advantages of small size, light weight, high reliability, small maintenance amount, energy saving and environmental protection, can be directly attached to the circuit board, has better reliability and durability, can be conveniently integrated in a compact circuit board layout, and is suitable for space-limited application scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, without creative labor, other drawings can also be obtained from the structure shown in the drawings.

[0017] Fig. 1 It is an overall structure schematic view of a surface-mount transformer according to an embodiment of the present application.

[0018] Fig. 2 It is an overall structure schematic view of a surface-mount transformer according to an embodiment of the present application.

[0019] Fig. 3 It is an exploded structure schematic view of a surface-mount transformer according to an embodiment of the present application.

[0020] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0021] Clearly and completely, the technical solutions in the embodiments of the present application will be described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0023] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0024] The present application provides a surface mount transformer.

[0025] For example, Figs. 1 to 3As shown in the utility model one embodiment, the surface mount transformer, including insulating base 101, first magnetic core 102, second magnetic core 103, insulating bobbin 104, annular coil winding 105, welding pin 106 and elastic fixing piece 107, the appearance of first magnetic core 12 and second magnetic core 103 are all E-shaped structure setting, the inside wall of first magnetic core 102 and second magnetic core 103 respectively protrude a first core tube 1021 and second core tube 1031 in the middle, insulating base 101 is set on first magnetic core 102, the middle of insulating base 101 is recessed with first through hole 1011, first core tube 1021 is set in first through hole 1011, second magnetic core 103 is covered on first magnetic core 102, the middle of insulating bobbin 104 is provided with a second through hole 1041, first core tube 1021 and second core tube 1031 are respectively embedded in second through hole 1041, annular coil winding 105 is sleeved on insulating bobbin 104, the both sides of insulating base 101 are respectively provided with a support plate 1012, the appearance of welding pin 106 is all Z-shaped structure setting, welding pin 106 is respectively and side by side set on the side wall of support plate 1012, the appearance of elastic fixing piece 107 is U-shaped structure setting, the both ends of elastic fixing piece 107 are respectively provided with a elastic clamping hook arm 1071, elastic fixing piece 107 is set on the upper end of second magnetic core 103, and the lower end of elastic clamping hook arm 1071 is respectively in contact with the lower end wall of the both ends of first magnetic core 102, the inner top wall of the upper end of elastic fixing piece 107 is in contact with the upper end wall of second magnetic core 103, welding pin 106 is respectively electrically connected with annular coil winding 105.

[0026] Specifically, the upper end of insulating bobbin 104 is protruded with a limiting flange 1042 along the circumferential direction, the upper end of annular coil winding 105 is in contact with the lower end wall of limiting flange 1042, which limits the annular coil winding.

[0027] Specifically, the side wall of support plate 1012 is recessed with a plurality of insertion slots 1013 along the length direction, the upper end of welding pin 106 is respectively embedded in the insertion slot 1013.

[0028] Specifically, the upper end of elastic fixing piece 107 is set as a concave circular arc surface structure, so that the clamping force of elastic fixing piece is larger, thereby making the assembly of transformer more firm and reliable.

[0029] Specifically, the side wall of support plate 1012 is provided with a slope 1014, and the slope 1014 is recessed with a plurality of wire grooves 1015.

[0030] Specifically, the first magnetic core 102 and the second magnetic core 103 are both made of Mn-Zn soft magnetic ferrite material, which has high magnetic permeability and low magnetic resistance, and is suitable for high frequency application.

[0031] Specifically, the insulating base 101 and the insulating bobbin 104 are formed of bakelite or flame-retardant nylon or flame-retardant PET plastic or flame-retardant PBT plastic or liquid crystal polymer material, so as to effectively improve the insulation performance of the transformer.

[0032] Specifically, the elastic fixing member 107 is formed of aluminum alloy or iron alloy or stainless steel material, so that the assembly of the transformer is more firm and reliable.

[0033] Specifically, the welding pin 106 is formed of copper or copper alloy material, so as to have high conductivity.

[0034] Specifically, the working principle of the utility model is based on the electromagnetic induction principle. When the current is applied to the input end of the transformer, the current will pass through the magnetic circuit formed by the ferrite core pipe and excite the magnetic field. The coil wound on the core pipe receives the magnetic field action, thereby causing the induced electromotive force in the coil, and transmitting it to the output end. Two ferrite core pipes are used to realize the magnetic circuit channel, and the change of magnetic flux is limited by the saturation characteristics of the ferrite. This structure design helps to improve the efficiency and precision of the transformer and reduce the waste of leakage magnetic flow.

[0035] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model. Any equivalent structural transformation based on the utility model concept, the contents of the utility model specification and the drawings, or direct / indirect application in other related technical fields are included in the patent protection range of the utility model.

Claims

1. A surface mount transformer, characterized by The application relates to an E-shaped magnetic core, which comprises an insulating base, a first magnetic core, a second magnetic core, an insulating bobbin, a ring-shaped coil winding, welding pins and an elastic fixing piece, the first magnetic core and the second magnetic core are both provided in an E-shaped structure, a first core pipe and a second core pipe are respectively arranged in the middle of the inner side walls of the first magnetic core and the second magnetic core, the insulating base is arranged on the first magnetic core, a first through hole is arranged in the middle of the insulating base, the first core pipe is arranged in the first through hole, the second magnetic core is arranged on the first magnetic core, a second through hole is arranged in the middle of the insulating bobbin, the first core pipe and the second core pipe are respectively arranged in the second through hole, the ring-shaped coil winding is arranged on the insulating bobbin, the two sides of the insulating base are respectively arranged on a support plate, the welding pins are both provided in a Z-shaped structure, the welding pins are respectively arranged side by side on the side walls of the support plate, the elastic fixing piece is provided in a U-shaped structure, two elastic hook arms are respectively arranged at the two ends of the elastic fixing piece, the elastic fixing piece is arranged at the upper end of the second magnetic core, the lower end walls of the two ends of the first magnetic core are respectively in abutment with the lower end walls of the two elastic hook arms, the inner top wall of the upper end of the elastic fixing piece is in abutment with the upper end wall of the second magnetic core, and the welding pins are electrically connected with the ring-shaped coil winding.

2. The surface-mount transformer of claim 1, wherein The upper end of the insulating bobbin is provided with a limiting flange in the circumferential direction, and the upper end of the ring-shaped coil winding is in abutment with the lower end wall of the limiting flange.

3. The surface-mount transformer of claim 1, wherein, The side walls of the support plate are provided with a plurality of insertion grooves in the length direction, and the upper ends of the welding pins are respectively arranged in the insertion grooves.

4. The surface-mount transformer of claim 1, wherein, The upper end of the elastic fixing piece is provided in a concave circular arc curved surface structure.

5. The surface mount transformer of claim 1, wherein, The side walls of the support plate are both provided with an inclined surface, and the inclined surface is provided with a plurality of wire grooves.

6. The surface-mount transformer of claim 1, wherein, The first magnetic core and the second magnetic core are both made of Mn-Zn soft magnetic ferrite material.

7. The surface-mounting transformer according to claim 1, characterized in that, The insulating base and the insulating bobbin are both made of bakelite or flame-retardant nylon or flame-retardant PET plastic or flame-retardant PBT plastic or liquid crystal polymer material.

8. The surface-mount transformer of claim 1, wherein, The elastic fixing piece is made of aluminum alloy or iron alloy or stainless steel material.

9. The surface-mounting transformer according to claim 1, characterized in that, The welding pins are made of copper or copper alloy material.

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