JPH0590831U - Airtight terminal - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a glass hermetic type surface mount airtight terminal in which at least one of lead terminals can be used as a ground terminal. [Structure] A glass 2 is provided under a metal seal ring 1 to form a box-shaped airtight space 4, and the glass 2
A plurality of lead terminals 3 penetrating inside and outside the airtight space 4.
In the hermetically sealed terminal, at least one of the lead terminals 3 is used as a ground terminal 5, the ground terminal 5 is branched into two, and one of the branches, a body ground terminal 53, is bonded to the seal ring 1. It is characterized by being. [Effect] Since at least one of the plurality of lead terminals is used as a ground terminal, and this ground terminal is branched into two, and the body ground terminal that is one branch is bonded to the seam ring, a conductive adhesive material is used in the subsequent process. As a result, there is an advantage that it is not necessary to conduct at least one of the lead terminals.

Description

[Detailed description of the device]

[0001]

[Technical field of invention]

 The present invention relates to an airtight terminal, and more particularly to a grounding structure of a glass hermetic type surface-mounting airtight terminal having a box shape in which glass is provided under a seam ring.

[0002]

[Prior art]

 As shown in FIG. 9, a glass hermetic type surface-mount airtight terminal is provided with an insulating material made of glass at the bottom of a metal seam ring 1, and a hook-shaped lead terminal 3 is hermetically sealed from the bottom of the glass 2 on this glass 2. The space 4 is penetrated and sealed. After mounting a circuit component or the like (not shown) in the airtight space 4 of the airtight terminal and connecting it to the lead terminal 3, a cover (not shown) is covered and the seam ring 1 is bonded. The circuit parts and the like are hermetically sealed.

FIG. 10 shows a glass hermetic type surface-mounting hermetically-sealed terminal of another form. In this hermetically-sealed terminal, a glass 2 is similarly provided below a seam ring 1 to form a crank-shaped lead. The terminal 3 is sealed with the glass 2. In this case, unlike the airtight terminal shown in FIG. 9 described above, the lead terminal 3 penetrates the airtight space 4 and the outside not from the bottom but from the side surface.

[0004]

[Problems solved by the device]

 In the airtight terminal having such a structure, for example, a seal ring (a cover that conducts with the seal ring) may be grounded. Especially when enclosing components used in the high frequency band, it is absolutely necessary to provide a ground. In this case, in the conventional airtight terminal, all of the lead terminals 3 are insulated and sealed by the seal ring 1 and the glass 2, so that at least the lead terminals 3 should be attached when mounting the circuit component. Under the present circumstances, one of them is made into a ground terminal by making it conductive with the seam ring 1 using a conductive adhesive or the like.

However, such a work is time-consuming and increases the cost of the hermetically sealed circuit component.

[0006]

[The purpose of the device]

 The present invention has been made in view of the above problems, and an object of the present invention is to provide a glass hermetic type surface mount airtight terminal in which at least one of the lead terminals can be used as a ground terminal.

[0007]

[Means for solving problems]

 In order to solve the above problems, the airtight terminal according to the present invention has a box-like airtight space provided with a glass under a metal seal ring, and a plurality of leads penetrating the glass in and out of the airtight space. In a hermetically sealed terminal, at least one of the lead terminals is a ground terminal, the ground terminal is branched into two, and one of the branches, a body ground terminal, is bonded to the seal ring. This is characterized.

According to the airtight terminal of the present invention, at least one of the plurality of lead terminals serves as a ground terminal, the ground terminal is branched into two, and one branch of the body ground terminal is bonded to the seam ring. Therefore, there is an advantage that it is not necessary to conduct at least one of the lead terminals by a conductive adhesive material or the like in the subsequent process.

[0009]

【Example】

 1 is a perspective view of a glass hermetic type surface mounting airtight terminal of an embodiment of the airtight terminal of the present invention, FIG. 2 is a plan view and FIG. 3 is a sectional view taken along the line AA of FIG. is there. As is clear from these figures, the airtight terminal of the present invention is provided with an insulating material made of glass 2 at the bottom of a metal seam ring 1, and a hook-shaped lead terminal 3 is made airtight at the glass 2 from the bottom of the glass 2. It has a structure in which the space 4 is penetrated and sealed. Such circuit parts (not shown) are mounted in the airtight space 4 of the airtight terminal, connected to the lead terminals 3, covered with a cover (not shown), and bonded at the seam ring 1 portion. Thus, the circuit parts and the like are hermetically sealed.

In this embodiment, at least one of the lead terminals is the ground terminal 5, and this ground terminal 5 is, as shown in FIG. 4, the ground outer portion 51 and the ground inner which is erected in a hook shape. A body ground terminal 53 is provided which has a portion 52 and is branched from the outer portion 51. The body grounding terminal 53 has a grounding adhesive portion 531 which is erected on the information. The grounding adhesive portion 531 extends in the direction of the seaming 1 and is bonded by a method such as welding.

In this embodiment, as is clear from FIGS. 1 to 3, the earth bonding portion 531 is bonded inside the airtight terminal, that is, in the airtight space 4, but is bonded outside. It is clear that it is okay.

FIG. 5 is a plan view of another embodiment of the present invention, and FIG. 6 is a sectional view taken along the line BB. As is apparent from this figure, the ground terminal 5 is a ground outer portion 51. A body grounding terminal 53 is formed in two branches, and a grounding bonding portion 531 rises along the outer wall of the airtight terminal and is bonded to the seam ring 1. On the other hand, the earth inner portion 52 penetrates the wall surface of the glass 2 and projects into the airtight space 4.

FIG. 7 is a plan view of another embodiment of the present invention, and FIG. 8 is a sectional view taken along line CC. This airtight terminal shows the shape of the airtight terminal shown in FIGS. 5 and 6 in which the ground bonding portion 531 stands up in the airtight space 4. That is, the ground terminal 5 is branched into two at the ground outer portion 51, and the body ground terminal 53, which is one branch, rises along the outer wall, penetrates the side wall of the glass 2 into the airtight space 4, and the ground bonding portion. 531 rises along the inner wall of the glass 2 and is attached to the seam ring 1. On the other hand, the other branch similarly rises along the outer wall, and the ground inner part 52 projects from the glass side wall into the airtight space 4 like the lead terminal 3.

[0014]

[Effect of the device]

 As described above, according to the airtight terminal of the present invention, at least one of the plurality of lead terminals is used as the ground terminal, the ground terminal is branched into two, and the body ground terminal that is one branch is connected to the ground terminal. Since it is bonded to the seam ring, there is an advantage that it is not necessary to electrically connect at least one of the lead terminals with a conductive adhesive material or the like in a subsequent process.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of an airtight terminal according to the present invention.

FIG. 2 is a plan view of the embodiment of the airtight terminal according to the present invention.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a perspective view of a ground terminal used in the above embodiment.

FIG. 5 is a plan view of another embodiment of the airtight terminal of the present invention.

FIG. 6 is a sectional view taken along the line BB of the embodiment.

FIG. 7 is a plan view of a third embodiment of the hermetic terminal of the present invention.

FIG. 8 is a cross-sectional view taken along the line CC of the embodiment.

FIG. 9 is a sectional view of a conventional airtight terminal.

FIG. 10 is a sectional view of a conventional airtight terminal.

[Explanation of symbols]

 1 Seam Ring 2 Glass 3 Lead Terminal 4 Airtight Space 5 Ground Terminal 51 Ground Outer Part 52 Ground Inner Part 53 Body Ground Terminal 531 Ground Bonded Part

Claims (1)

[Scope of utility model registration request] 1. An airtight terminal in which glass is provided below a metal seal ring to form a box-shaped airtight space, and a plurality of lead terminals penetrating inside and outside the airtight space are sealed to the glass. An airtight terminal, wherein at least one of the lead terminals is a ground terminal, the ground terminal is branched into two, and a body ground terminal which is one of the branches is bonded to the seal ring.