Packaging tube shell structure

Abstract

The utility model provides a packaging tube shell structure, belongs to the technical field of tube shell packaging, and solves the problem that in the prior art, when a well sealed pin is subjected to an axial external force, a glass insulator may crack. An opening is formed in the upper end face of the shell, a through hole is formed in the bottom of the shell, a pin movably penetrating out of the bottom of the shell from the through hole is arranged in the shell, the pin is fixedly sleeved with a pressing plate attached to the bottom of the outer side of the shell and used for blocking the through hole, the pin is sleeved with a nut in a threaded mode, and the nut abuts against the bottom of the inner side of the shell. The pin is sleeved with a glass insulator located between the nut and the pressing plate. The pin is limited to move in the axial direction under the cooperation of the nut and the pressing plate, the pin and the shell can be tightly connected together after the glass insulator is melted, and the phenomenon that the glass insulator cracks due to the fact that the pin and the shell are mutually staggered is avoided; and the pressing plate can block the molten glass insulator, so that the glass insulator is prevented from flowing out of the through hole.

Description

Technical Field

[0001] The utility model belongs to the technical field of shell packaging, and specifically belongs to a packaging shell structure. Background Art

[0002] The packaging shell greatly affects the performance of the chip inside the shell. In order to protect the chip inside the shell from external influences, it is required that the shell has a certain degree of airtightness, good electrical performance, corrosion resistance, oxidation resistance, resistance to harsh environments such as high temperature and high humidity, and meet certain stability and reliability.

[0003] In order to improve the sealing performance between the pin and the shell of the existing packaging shell, a glass insulator is sleeved on the pin. After the pin is assembled onto the shell, it is heated together until the glass insulator melts. After the glass insulator melts, it will fill the gap between the pin and the shell, and the sealing is achieved after the glass insulator cools. When the sealed pin is subjected to an axial external force, it may cause the glass insulator to crack, thereby affecting the sealing performance of the packaging shell. Summary of the Utility Model

[0004] In view of the above problems, the purpose of the present utility model is to provide a packaging shell structure. The movement of the pin along the axial direction is restricted by the cooperation of the nut and the pressing plate. The glass insulator located between the nut and the pressing plate can tightly connect the pin and the shell together after melting, avoiding the cracking of the glass insulator caused by the mutual misalignment of the pin and the shell; and the provided pressing plate can also block the melted glass insulator to prevent the glass insulator from flowing out of the through hole.

[0005] The technical solution adopted by the present utility model is as follows:

[0006] A packaging shell structure includes a shell with an opening provided on the upper end surface. A through hole is opened at the bottom of the shell. A pin is arranged in the shell and movably penetrates through the through hole to the bottom of the shell. A pressing plate that is fixedly sleeved on the pin and fits with the outer bottom of the shell to block the through hole is provided. A nut that is threadedly sleeved on the pin and abuts against the inner bottom of the shell is provided. A glass insulator is sleeved on the pin between the nut and the pressing plate.

[0007] Preferably, the pressing plate is circular, and a circular groove adapted to the pressing plate is opened at the outer bottom of the shell.

[0008] Preferably, an installation seat is fixedly arranged at the inner bottom of the shell. The pin movably penetrates through the installation seat and the nut abuts against the upper end surface of the installation seat.

[0009] Preferably, a cover plate is provided at the opening of the shell.

[0010] Preferably, a step for engaging the cover plate is annularly provided on the inner wall of the housing.

[0011] Preferably, at least two positioning posts are provided on the lower end surface of the cover plate, and a guiding seat corresponding to the positioning posts is fixedly provided on the inner wall of the housing, and a guiding groove for cooperating with the positioning posts is formed on the guiding seat.

[0012] Preferably, a tapered head is provided at the lower end of the positioning post.

[0013] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0014] The pin is restricted from moving axially under the cooperation of the nut and the pressing plate. The glass insulator located between the nut and the pressing plate can tightly connect the pin and the housing after melting, avoiding cracking of the glass insulator caused by the mutual misalignment of the pin and the housing; and the provided pressing plate can also block the melted glass insulator to prevent the glass insulator from flowing out of the through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic cross-sectional structure diagram provided by an embodiment of the present utility model;

[0017] Reference numerals: 1 - cover plate; 2 - positioning post; 3 - step; 4 - guiding seat; 5 - housing; 6 - mounting seat; 7 - nut; 8 - pin; 9 - pressing plate; 10 - glass insulator; 11 - circular groove; 12 - through hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts fall within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention.

[0021] The following will be combined with Figure 1 to make a detailed description of the present invention.

[0022] Embodiment

[0023] A package shell structure includes a shell 5 with an opening provided on the upper end surface. A through hole 12 is opened at the bottom of the shell 5. A pin 8 that movably penetrates through the bottom of the shell 5 from the through hole 12 is provided in the shell 5. A pressing plate 9 that fits against the bottom outside of the shell 5 and is used to block the through hole 12 is fixedly sleeved on the pin 8. A nut 7 that abuts against the bottom inside of the shell 5 is threadedly sleeved on the pin 8. A glass insulator 10 is sleeved on the pin 8 and is located between the nut 7 and the pressing plate 9.

[0024] The pin used is a nickel-clad alloy, or it can also be a Kovar alloy or other metal materials, mainly used to realize the communication between the external circuit and the internal device; the glass insulator 10 is a glass material with an annular structure, or a beryllium oxide insulating sheet, etc. can also be used, mainly used to isolate the metal shell, ensure that each pin has a separate circuit trace, and has high insulation. After heating and expanding and melting, it can completely fill the through hole 12 to ensure good airtightness of the shell 5. A certain space is left in the through hole 12 to meet the expansion requirements of the glass insulator 10.

[0025] The pin 8 is inserted into the through hole 12 from bottom to top, then the glass insulator 10 is placed into the through hole 12 from the upper opening of the shell 5, and finally the nut 7 is tightened so that the pressing plate 9 tightly abuts against the bottom outside of the shell 5 to prevent the melted glass insulator 10 from leaking out and at the same time limit the axial movement of the pin 8.

[0026] The pressing plate 9 is circular, and a circular groove 11 adapted to the pressing plate 9 is provided at the outer bottom of the housing 5. The pressing plate 9 can be just snapped into the circular groove 11 to ensure that the pin 8 is located on the axis of the through hole 12, so that the melted glass insulator 10 is evenly distributed around the pin 8; at the same time, it can also limit the lateral movement of the pin 8 in the radial direction to avoid the pin 8 laterally squeezing the glass insulator 10 and causing it to crack.

[0027] A mounting seat 6 is fixedly arranged at the inner bottom of the housing 5. The pin 8 movably penetrates through the mounting seat 6 and the nut 7 abuts against the upper end surface of the mounting seat 6. Using the mounting seat 6 increases the thickness of the bottom of the housing 5 to ensure that there is enough space in the through hole 12 to place the glass insulator 10 to meet the sealing requirements. If the mounting seat 6 is not used, the thickness of the bottom of the housing 5 can be increased, but this will increase the use cost of the housing 5 and increase the weight of the housing 5. Therefore, it is particularly important to use the mounting seat 6. A through hole 12 is also provided on the mounting seat 6, and this through hole 12 is aligned with the through hole 12 on the housing 5.

[0028] A cover plate 1 is provided at the opening of the housing 5. The cover plate 1 closes the space inside the housing 5 and plays a role in airtightness and protection. The cover plate 1 can be glass or optical glass, or it can be a metal cover plate or a cover plate with a metal outer frame and internal glass. After the pin 8 is sealed, the chip is placed inside the housing 5 for dispensing and curing. The pad of the chip and the pin 8 are interconnected through wire bonding (wedge bonding). Finally, the cover plate 1 is installed for sealing, and the sealing can be fixed with glue or welded with solder.

[0029] A step 3 for engaging the cover plate 1 is annularly provided on the inner wall of the housing 5. After the cover plate 1 is placed on the step 3, it is convenient to fix the gap between the cover plate 1 and the housing 5 with glue or solder from top to bottom.

[0030] At least two positioning posts 2 are provided on the lower end surface of the cover plate 1. A guiding seat 4 corresponding to the positioning posts 2 is fixedly arranged on the inner wall of the housing 5, and a guiding groove cooperating with the positioning posts 2 is provided on the guiding seat 4. After the positioning posts 2 are inserted into the guiding grooves in the guiding seat 4, the cover plate 1 is kept at the central position of the housing 5, that is, the distances between the four peripheral edges of the cover plate 1 and the inner wall of the housing 5 are the same, ensuring the uniform arrangement of the glue or solder, and thus ensuring the sealing performance of the cover plate 1.

[0031] A tapered head is provided at the lower end of the positioning post 2. The provision of the tapered head enables the positioning post 2 to be quickly inserted into the guiding groove.

[0032] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An encapsulation package structure, including a housing (5) with an opening provided on its upper end face, characterized in that, A through hole (12) is formed in the bottom of the housing (5). A pin (8) is arranged in the housing (5) and movably penetrates through the bottom of the housing (5) from the through hole (12). A pressing plate (9) which is fixedly sleeved on the pin (8), abuts against the outer bottom of the housing (5) and is used for blocking the through hole (12) is provided. A nut (7) which is threadedly sleeved on the pin (8) and abuts against the inner bottom of the housing (5) is provided. A glass insulator (10) is sleeved on the pin (8) and is located between the nut (7) and the pressing plate (9).

2. The encapsulation shell structure according to claim 1, characterized in that, The pressing plate (9) is circular, and a circular groove (11) adapted to the pressing plate (9) is formed in the outer bottom of the housing (5).

3. The encapsulation shell structure according to claim 1, characterized in that, An installation seat (6) is fixedly arranged on the inner bottom of the housing (5). The pin (8) movably penetrates through the installation seat (6), and the nut (7) abuts against the upper end surface of the installation seat (6).

4. A packaging tube shell structure according to claim 1, characterized in that, A cover plate (1) is arranged at the opening of the housing (5).

5. A package shell structure according to claim 4, characterized in that, A step (3) for clamping the cover plate (1) is annularly arranged on the inner wall of the housing (5).

6. A packaging shell structure according to claim 4, characterized in that, At least two positioning columns (2) are arranged on the lower end surface of the cover plate (1). A guiding seat (4) corresponding to the positioning columns (2) is fixedly arranged on the inner wall of the housing (5). A guiding groove cooperating with the positioning columns (2) is formed in the guiding seat (4).

7. A package housing structure according to claim 6, characterized in that, A tapered head is arranged at the lower end of the positioning column (2).

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