CN216928497U - Gland unit of insulated single transistor - Google Patents

Abstract

The utility model discloses an insulated single transistor fixing unit, which avoids the problem of insulativity that a metal elastic sheet directly presses a transistor by arranging an insulating gasket between the transistor and the metal elastic sheet; furthermore, at least two convex strips are formed on one surface of the insulating gasket, so that at least two linear contacts of the insulating gasket and the transistor are in contact, the stress imbalance of the single line to the transistor is reduced, and the damage of the transistor is reduced.

Description

Gland unit of insulated single transistor

Technical Field

The utility model relates to the technical field of insulating single transistor fixing devices, in particular to an insulating single transistor gland unit.

Background

At present, an insulated single-crystal transistor (such as TO247) needs TO be fixed with a PCBA board in the use process, and the insulated single-crystal transistor sometimes needs TO be attached and fixed with a heat sink or a radiator in order TO quickly dissipate heat in the use process of the insulated single-crystal transistor. In the prior art, the plastic gland is directly pressed on the surface of the insulated transistor, and the insulated single transistor is fixed between the PCBA and the radiating fin by using the fixing screw (as shown in figure 1). In order to improve the strength of the plastic gland, chinese patent document CN104465419B discloses a compressing and fixing component for packaging a transistor, which includes a PCBA board and a transistor, the compressing and fixing component includes a metal spring piece and a plastic fixing piece combined together, a cavity is formed by an inner side wall and a bottom wall in the plastic fixing piece, an inner buckle and a support rib are arranged on the inner side wall and/or the bottom wall of the cavity, the metal spring piece is fixed on the plastic fixing piece by being inserted between the inner buckle and the support rib, a support step is arranged on the inner side wall and/or the inner bottom wall of the cavity, and an outer buckle which is perpendicular to the outer bottom wall of the cavity and extends outwards is arranged on the outer bottom wall of the cavity. The plastic part is reduced by adding the metal elastic sheet in the technology, the consequence of deformation caused by fatigue is reduced, however, the added metal elastic sheet can cause certain risk of insulativity, and meanwhile, the applied force of the metal elastic sheet on the transistor is single-linear, so that the transistor is easily damaged.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem, the present invention provides an insulated single-transistor fixing unit, which includes a cover and a metal spring installed in a cavity of the cover, wherein an insulating spacer is further disposed between the transistor and the metal spring.

Furthermore, at least two convex strips are formed on one surface of the insulating gasket, and the convex strips are fixedly installed in a contact mode with the transistor.

Furthermore, an arc-shaped structure is formed between every two convex strips.

Further, two ends of the insulating gasket are respectively abutted against the middle side wall and the head side wall of the cover body.

Furthermore, at least one end of the insulating gasket forms a bending part and is abutted against the middle side wall and/or the head side wall.

Furthermore, bumps are formed at two ends of the bending part close to the middle side wall; side wall openings are formed on the side walls of the two sides of the cover body; the protruding block is inserted into the side wall opening, and the insulating gasket can move up and down.

Furthermore, an open slot is formed on the surface of the insulating gasket, which is far away from the transistor, and a part of the metal elastic sheet is placed in the open slot.

Furthermore, an inner buckle is formed in the accommodating cavity and used for mounting the metal elastic sheet.

Furthermore, a cover body fixing hole is formed in the cover body, and a spring piece hole is formed in the metal spring piece; when the fixing device is fixed, a fixing screw or a fixing bolt penetrates through the cover body fixing hole and the elastic sheet hole and is in threaded connection with the fixing piece.

Furthermore, the periphery of the cover body fixing hole is bulged to form a clamping structure; reinforcing ribs and auxiliary platforms are formed in the accommodating cavities; and a heat conduction and insulation radiating fin is arranged between the transistor and the fixing piece.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

(1) according to the insulated single-transistor fixing unit, the insulating gasket is arranged between the transistor and the metal elastic sheet, so that the problem that the metal elastic sheet directly presses the insulating property of the transistor is solved; furthermore, at least two raised strips are formed on one surface of the insulating gasket, so that the insulating gasket is in at least two linear contacts with the transistor, the unbalanced stress of a single line on the transistor is reduced, and the damage of the transistor is reduced; furthermore, an arc-shaped structure is arranged between the two convex strips, so that the convex strips have better structure and strength, and the force application is optimal; furthermore, two ends of the insulating gasket are abutted against the cover body respectively, so that the insulating gasket is more stably installed and fixed, and the installation failure caused by small volume in the installation process is reduced; furthermore, the insulating gasket forms a bending part, so that the insulating gasket is more stably installed and fixed; furthermore, the insulating gasket forms a convex block, the cover body forms an opening, and the convex block and the cover body are combined, so that the insulating gasket is more stably installed, and particularly cannot fall off from the cover body when the insulating gasket is not fixedly installed; furthermore, the insulating gasket forms an open slot, so that the metal elastic sheet can be conveniently installed and fixed, and the installation is more convenient, especially during the overturning.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to derive other drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art insulated single crystal tube gland unit;

FIG. 2 is a schematic diagram of the structure of the insulated single crystal tube cap unit of the present invention;

FIG. 3 is a first schematic structural diagram of the cover of the present invention;

FIG. 4 is a second schematic structural view of the cover of the present invention;

FIG. 5 is a schematic view of the construction of the insulating gasket of the present invention;

FIG. 6 is a schematic structural diagram of a metal dome according to the present invention;

the reference numbers in the figures denote: 1-a cover body; 2-metal shrapnel; 3-a transistor; 4-an insulating spacer; 5-convex strips; 6-arc structure; 7-middle side wall; 8-head side wall; 9-a bump; 10-opening a side wall; 11-open slots; 12-inner buckle; 13-cover fixing hole; 14-a projectile aperture; 15-a fixing member; 16-a clamping structure; 17-reinforcing ribs; 18-an auxiliary table; 19-thermally conductive insulating heat sink; 20-wing blocks; 21-side wall; 22-PCB board.

Detailed Description

The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. The embodiments in the present invention, other embodiments obtained by persons skilled in the art without any inventive work, belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

As shown in fig. 2-6, the present embodiment discloses an insulated single crystal transistor capping unit, which includes a cap body 1 and a metal dome 2 installed in a cavity of the cap body 1, and an insulating gasket 4 is further disposed between a transistor 3 and the metal dome 2. The structure of the insulating spacer 4 is not particularly limited as long as the metal elastic sheet 2 can be prevented from contacting the transistor 3, in this embodiment, at least two protruding strips 5 are formed on one surface of the insulating spacer 4, the protruding strips 5 are installed in contact with the transistor 3, the structure of the protruding strips 5 is not particularly limited, the top ends of the protruding strips can be strip-shaped, surface-shaped, such as a plane or an arc-shaped surface, and the number of the protruding strips 5 is preferably 2; further, an arc-shaped structure 6 is formed between every two convex strips 5; furthermore, two ends of the insulating gasket 4 respectively abut against the middle side wall 7 and the head side wall 8 of the cover body; furthermore, at least one end of the insulating gasket 4 forms a bending part, the bending part is arranged close to the middle side wall 7 and/or the head side wall 8 and is abutted against the middle side wall, the shape of the bending part is not limited, the bending part can be a bending plate, a bending strip, a bending net and the like, the bending plate is preferably selected, and the bending part is only arranged close to the middle side wall 7; furthermore, two ends of the bending part close to the middle side wall 7 are respectively provided with a convex block 9, meanwhile, side wall openings are formed on two side walls 21 of the cover body 1, the convex blocks 9 are inserted into the side wall openings 10, and the insulating gasket 4 can move up and down; further, an open slot 11 is formed on a surface of the insulating gasket 4 away from the transistor 3, and when the metal dome 2 is installed, a part of the metal dome 2 is placed in the open slot 11, wherein the open slot 11 has various structures, such as a blind hole type, an expanded opening type, and the like, in this embodiment, the open slot 11 is formed by a three-sided fence, and one side of the open slot is a bent portion of the insulating gasket 4; further, an inner buckle 12 is formed in the accommodating cavity and used for mounting the metal elastic sheet 2, the inner buckle 12 is not particularly limited, and a buckle structure in the prior art can be selected; further, a cover body fixing hole 13 is formed in the cover body 1, a spring piece hole 14 is formed in the metal spring piece 2, when fixing is performed, a fixing screw or a fixing bolt penetrates through the cover body fixing hole 13 and the spring piece hole 14 and is screwed on the fixing piece 15, the selection of the fixing piece 15 can be selected according to an actual installation structure, and in the embodiment, the fixing piece 15 is a radiator or a radiating plate; further, the periphery of the cover body fixing hole 13 is bulged to form a clamping structure 16, and the clamping structure 16 is not particularly limited, and in this embodiment, is a cylindrical structure; of course, in order to achieve a better clamping effect, a wing block 20 may also be formed on the clamping structure 16; the clamping structure 16 is used for realizing clamping by penetrating through a hole arranged on the PCB 22; furthermore, a reinforcing rib 17 and an auxiliary table 18 are formed in the cavity, the auxiliary table 18 is used for temporarily assisting in positioning corresponding parts when the auxiliary table is convenient to mount, and the arrangement position of the auxiliary table can be on the reinforcing rib 17 or the bottom wall of the cavity; further, a heat conducting and insulating heat sink 19 is disposed between the transistor 3 and the fixing member 15.

In this embodiment, the material of the insulating spacer 4 is not particularly limited, and is preferably a plastic material, and the forming process is integrally formed.

The installation process of the utility model is as follows:

insert interior buckle 12 with metal shrapnel 2 and pack into the appearance chamber, then, adorn insulating pad 4 and cooperate with metal shrapnel 2, then transistor 3 advances line location and fixes, welds transistor 3 after that, finally, compresses tightly lid etc. through set screw or fixing bolt.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims (9)

1. An insulated single-transistor fixing unit is characterized by comprising a cover body and a metal elastic sheet arranged in a cavity of the cover body, wherein an insulating gasket is arranged between a transistor and the metal elastic sheet; at least two convex strips are formed on one surface of the insulating gasket, and the convex strips are fixedly installed in a contact mode with the transistors.

2. The insulated single-transistor fixing unit as claimed in claim 1, wherein an arc structure is formed between each two of the ribs.

3. The insulated single-transistor fixing unit as claimed in claim 1 or 2, wherein both ends of the insulating spacer are abutted against a middle sidewall and a head sidewall of the cap body, respectively.

4. The insulated single-transistor fixing unit according to claim 3, wherein at least one end of the insulating spacer is formed with a bent portion and abuts against the middle sidewall and/or the head sidewall.

5. The insulated single-transistor fixing unit according to claim 4, wherein bumps are formed near both ends of the bent portion of the middle sidewall; side wall openings are formed on the side walls of the two sides of the cover body; the protruding block is inserted into the side wall opening, and the insulating gasket can move up and down.

6. The insulated single-transistor fixing unit as claimed in claim 5, wherein a face of the insulating spacer, which is away from the transistor, forms an open groove, and a portion of the metal spring is placed in the open groove.

7. The insulated single-transistor fixing unit as claimed in claim 6, wherein an inner snap is formed in the cavity for mounting the metal dome.

8. The insulated single-transistor fixing unit as claimed in claim 7, wherein a cover fixing hole is formed on the cover, and a spring plate hole is formed on the metal spring plate; when the fixing device is fixed, a fixing screw or a fixing bolt penetrates through the cover body fixing hole and the elastic sheet hole and is in threaded connection with the fixing piece.

9. The insulated single-transistor fixing unit as claimed in claim 8, wherein the peripheral protrusion of the cover fixing hole forms a snap-fit structure; reinforcing ribs and auxiliary platforms are formed in the accommodating cavities; and a heat conduction and insulation radiating fin is arranged between the transistor and the fixing piece.

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