A plastic and metal combined power module housing

Abstract

The present invention relates to the technical field of power module housings, and in particular to a plastic and metal combined power module housing, comprising a housing body, the housing body comprising a metal shell and a plastic shell, the plastic shell surrounding the outside of the metal shell, the metal shell being a coverless box structure with an opening on one side, and a connecting pin being provided at the opening of the metal shell. The present invention provides a housing body comprising a metal shell and a plastic shell, and surrounds the plastic shell on the outside of the metal shell, so that the housing body can simultaneously possess the insulating safety distance characteristics of plastic and the heat dissipation characteristics of metal, has a good protective effect, and enables the power module to have good protection and service life; at the same time, a connecting pin is provided at the bottom of the metal shell, so that the connecting pin can be connected to a circuit board when the housing body is installed, thereby playing a metal shielding role.

Description

Technical Field

[0001] The invention relates to the technical field of power module shells, and in particular to a plastic and metal combined power module shell. Background Art

[0002] The power module is a power supply mounted on a printed circuit board. It can provide power for application-specific integrated circuits, digital signal processors, microprocessors and other digital or analog loads. It is widely used in switching equipment, access equipment, mobile communications, microwave communications, optical transmission, routers and other communication fields, as well as automotive electronics, aerospace, etc. When the power module is installed and used, a protective casing is usually provided on the outside of the power module for protection to ensure that the power module can be used for a long time and extend its life.

[0003] However, the protective shell of the power module in the current prior art has a single function during use, which is only a protective function. When protecting the power module, this protective shell cannot quickly dissipate the heat generated by the power module, resulting in a shortened service life of the power module. At the same time, it cannot shield the interference generated by other electronic components. Summary of the invention

[0004] In order to solve the problems in the above background technology, the present invention provides a plastic and metal combined power module housing, which not only protects the power module but also has good metal heat dissipation and metal shielding capabilities, and has a good protection effect.

[0005] The solution adopted by the present invention to solve its technical problem is: a plastic and metal combined power module housing, including a housing body, the housing body includes a metal shell and a plastic shell, the plastic shell is surrounded by the outside of the metal shell, the metal shell is a coverless box structure with an opening on one side, and a connecting pin is provided at the opening of the metal shell.

[0006] By adopting the above technical solution, the shell body has both the insulation safety distance characteristics of plastic and the heat dissipation characteristics of metal, and has a good protection effect; at the same time, the connecting pins and the circuit board also have a metal shielding function after being welded.

[0007] Furthermore, the plastic shell includes a plastic upper cover and a plastic main body, the outer side of the plastic main body is surrounded by a plastic enclosure, the bottom of the plastic enclosure is connected to the bottom of the plastic main body, and the plastic enclosure is combined with the side wall of the plastic main body to form an installation interlayer, the metal shell is inserted into the installation interlayer, and the plastic upper cover is covered on the top of the plastic main body.

[0008] Furthermore, a connecting port is provided on the end surface where the plastic enclosure is connected to the bottom of the plastic body, and the connecting pin passes through the connecting port.

[0009] By adopting the above technical solution, the metal shell and the plastic shell are installed, and the plastic shell is surrounded by the metal shell as a whole, so that the shell body has the insulation safety distance characteristics of plastic and the heat dissipation characteristics of metal.

[0010] Furthermore, a heat dissipation window is provided on the plastic shell to expose the metal shell.

[0011] By adopting the above technical solution and setting the heat dissipation window, the shell body can have a better heat dissipation effect.

[0012] In summary, the beneficial effects of the present invention are:

[0013] 1. The present invention provides a shell body including a metal shell and a plastic shell, and surrounds the plastic shell on the outside of the metal shell, so that the shell body can simultaneously have the insulation safety distance characteristics of plastic and the heat dissipation characteristics of metal, has a good protection effect, and enables the power module to have good protection and service life.

[0014] 2. The bottom opening of the metal shell of the present invention is provided with connecting pins, so that the connecting pins can be welded or riveted to the circuit board when the shell body is installed, which plays a metal shielding role. Compared with the traditional power module shell, it ensures safety insulation while having metal heat dissipation and metal shielding functions.

[0015] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of embodiment 1;

[0017] Figure 2 It is a structural schematic diagram of another angle of embodiment 1;

[0018] Figure 3 It is an exploded view of the first embodiment;

[0019] Figure 4 This is a schematic structural diagram of a plastic body of Example 1;

[0020] Figure 5 It is a structural schematic diagram of the second embodiment;

[0021] Figure 6 It is an exploded view of the second embodiment;

[0022] Figure 7 This is a schematic diagram of the structure of Embodiment 3;

[0023] Figure 8 It is a structural schematic diagram of Embodiment 4;

[0024] Fig. 9 This is a schematic diagram of the internal structure of Embodiment 4;

[0025] Fig.10 This is an exploded view of Example 4.

[0026] In the figure: 1. Shell body; 2. Metal shell; 3. Plastic shell; 31. Plastic upper cover; 32. Plastic body; 33. Plastic enclosure; 34. Installation interlayer; 35. Connection port; 36. Insulating retaining wall; 4. Connecting pins; 5. Heat dissipation window; 51. Inner metal heat dissipation window; 52. Outer metal heat dissipation window. DETAILED DESCRIPTION

[0027] In order to make the content of the present invention more clearly understood, the present invention is further described below based on specific embodiments in conjunction with the accompanying drawings.

[0028] It should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "inner", "outer" and the like used herein to indicate directions or positional relationships are based on directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. Unless otherwise specified, "plurality" means two or more.

[0029] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0030] Embodiment 1:

[0031] like Figures 1 to 3As shown, a plastic and metal combined power module housing includes a housing body 1. By installing the housing body 1 on the power module, the power module is protected and the service life of the power module is extended. The housing body 1 in this embodiment includes a metal shell 2 and a plastic shell 3. By surrounding the plastic shell 3 outside the metal shell 2, the housing body 1 can simultaneously have the insulation safety distance characteristics of the plastic shell 3 and the rapid heat dissipation characteristics of the metal shell 2. Therefore, after the power module is installed with the housing body 1 of this embodiment, it can have an excellent protection effect. At the same time, the heat generated during the working process can be quickly dissipated through the heat dissipation characteristics of the metal shell 2, thereby extending the service life of the power module.

[0032] like Figure 2 As shown, the metal shell 2 of this embodiment is a coverless box structure with an opening at the bottom, so that after the metal shell 2 is connected to the plastic shell 3, it is convenient to directly cover the power module from the top of the power module to achieve installation, and the installation method is convenient; the bottom opening of the metal shell 2 of this embodiment is provided with a connecting pin 4, after the metal shell 2 and the plastic shell 3 are assembled, the connecting pin 4 at the bottom opening of the metal shell 2 can pass through the plastic shell 3, so that when the shell body 1 and the power module are installed, the connecting pin 4 can be welded or riveted to the circuit board, so that the power module has the function of metal shielding, which can avoid external electromagnetic interference with the operation of the power module and ensure the stable operation of the power module.

[0033] like Figure 2 and Figure 3 As shown, the plastic shell 3 of this embodiment includes a plastic upper cover 31 and a plastic main body 32, wherein the outer side of the plastic main body 32 is surrounded by a plastic enclosure 33, and the bottom of the plastic enclosure 33 is connected to the bottom of the plastic main body 32 to form an integrated structure, so that the plastic enclosure is combined with the side wall of the plastic main body 32 to form an installation interlayer 34 with an open top. The metal shell 2 of this embodiment is adapted to the structure of the installation interlayer 34, so that the metal shell 2 can be directly plugged into the installation interlayer 34 from the top of the plastic shell 3 to achieve the installation of the metal shell 2 and the plastic shell 3. Finally, the plastic upper cover 31 is covered on the top of the plastic main body 32, so that the exposed part of the top of the metal shell 2 can be surrounded by the plastic upper cover 31, thereby achieving full enclosure of the metal shell 2, so that the shell body 1 has both the insulation safety distance characteristics of plastic and the heat dissipation characteristics of metal.

[0034] like Figure 4As shown, a connection port 35 is provided on the end surface where the plastic enclosure 33 of this embodiment is connected to the bottom of the plastic main body 32. After the metal shell 2 is inserted into the installation interlayer 34, the connection pin 4 can pass through the connection port 35. After the power module is installed in the shell body 1 of this embodiment, the connection pin 4 passing through the connection port 35 can be welded or riveted to the circuit board, so that the shell body 1 of this embodiment also has the function of metal shielding, thereby ensuring the normal operation of the power module.

[0035] Embodiment 2:

[0036] like Figures 5 and 6 As shown, the difference from the first embodiment is that the plastic shell 3 of the second embodiment includes a plastic body 32 and a semi-enclosed insulating retaining wall 36 surrounded by the outside of the plastic body 32, wherein the bottom of the semi-enclosed insulating retaining wall 36 is connected to the bottom of the plastic body 32 to form an integrated structure, and the semi-enclosed insulating retaining wall 36 is combined with the outer wall of the plastic body 32 to form a mounting interlayer 34 semi-enclosed on one side of the plastic body 32, and the metal shell 2 and the plastic shell 3 are assembled by inserting the metal shell 2 into the mounting interlayer 34; this embodiment simplifies the production process and production cost compared with the first embodiment by setting the semi-enclosed insulating retaining wall 36 outside the plastic shell 3, and the semi-enclosed structure also facilitates the assembly of the metal shell 2 and the plastic shell 3.

[0037] Embodiment three:

[0038] like Figure 7 As shown, the difference from the first and second embodiments is that the plastic shell 3 of the third embodiment is integrally formed with the metal shell 2. Specifically, the plastic shell wraps the metal shell 2 and is injection molded into a dual-material shell body 1 at one time, which reduces the subsequent assembly process of the shell body 1 and makes the metal shell 2 surrounded by the plastic shell 3 as a whole, so that the shell body 1 has the characteristics of metal heat dissipation while ensuring safety insulation; the connecting pin 4 of this embodiment passes through the plastic shell 3 and extends to the bottom of the metal shell 2, so that the connecting pin 4 can be welded or riveted to the circuit board, thereby realizing the metal shielding function of the shell body 1.

[0039] Embodiment 4:

[0040] like Figures 8 to 10As shown, the difference from the third embodiment is that the plastic shell 3 of the fourth embodiment is provided with a heat dissipation window 5 exposing the metal shell 2, which can effectively improve the heat dissipation capacity of the shell body 1; the heat dissipation window 5 is arranged through the plastic shell 3, so that after the metal shell 2 and the plastic shell 3 are integrally injection-molded, the metal shell 2 is exposed on the inner side of the plastic shell 3 to form an inner metal heat dissipation window 51, and the metal shell 2 is exposed on the outer side of the plastic shell 3 to form an outer metal heat dissipation window 52, ​​so that the heat generated by the power module can be quickly transferred to the metal shell 2 through the inner metal heat dissipation window 51, and the metal shell 2 is then dissipated through the outer metal heat dissipation window 52, ​​which has the effect of rapid heat dissipation.

[0041] The working principle of this embodiment is as follows: this embodiment provides a shell body 1 including a metal shell 2 and a plastic shell 3, and surrounds the plastic shell 3 on the outside of the metal shell 2, so that the shell body 1 can simultaneously have the insulation safety distance characteristics of plastic and the heat dissipation characteristics of metal, has a good protection effect, and enables the power module to have good protection and service life; and, in this embodiment, a connecting pin 4 is provided at the bottom opening of the metal shell 2, so that the connecting pin 4 can be welded or riveted to the circuit board when the shell body 1 is installed, which plays a metal shielding role. Compared with the traditional power module shell, it has metal heat dissipation and metal shielding functions while ensuring safe insulation.

[0042] The embodiments described above are only preferred implementation modes of the present invention and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and modifications made by those skilled in the art on the basis of the present invention shall fall within the protection scope of the present invention.

Claims

1. A plastic and metal combined power module housing, comprising a housing body (1), characterized in that: The shell body (1) comprises a metal shell (2) and a plastic shell (3), wherein the plastic shell (3) is surrounded on the outside of the metal shell (2), and the metal shell (2) is a coverless box structure with an opening at the bottom, and a connecting pin (4) is provided at the opening of the metal shell (2); the plastic shell (3) comprises a plastic upper cover (31) and a plastic main body (32), wherein the outside of the plastic main body (32) is surrounded by a plastic enclosure (33), the bottom of the plastic enclosure (33) is connected to the bottom of the plastic main body (32), and the plastic enclosure is combined with the side wall of the plastic main body (32) to form an installation interlayer (34), the metal shell (2) is inserted into the installation interlayer (34), and the plastic upper cover (31) covers the top of the plastic main body (32).

2. The plastic and metal combined power module housing according to claim 1, characterized in that: A connection opening (35) is provided on the end surface where the plastic enclosure (33) is connected to the bottom of the plastic body (32), and the connection pin (4) passes through the connection opening (35).

3. The plastic and metal combined power module housing according to claim 1, characterized in that: The plastic shell (3) is provided with a heat dissipation window (5) through which the metal shell (2) is exposed.

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