JP2606051Y2 - Airtight terminal - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic terminal, and more particularly, to a hermetic terminal for surface mounting having a smaller mounting volume and a ground terminal as compared with the prior art.

[0002]

2. Description of the Related Art As shown in FIG. 7, a hermetic terminal for surface mounting is provided with a lead terminal insertion hole 2 and optionally a ground terminal insertion hole 7 in a bottom portion 11 of a box-shaped base 1 and a linear lead terminal. 3. The ground terminal 6 is penetrated into the airtight space 4 through the lead terminal insertion hole 2 and the ground terminal insertion hole 7, respectively. The lead terminal 3 is sealed with glass 5, and the ground terminal 6 is formed by brazing or welding. I have.

[0003] Circuit components (not shown) are mounted in the hermetic space 4 of the hermetic terminal as described above, connected to the lead terminal 3 and the ground terminal 6, and then covered with a cover (not shown) and adhered. Thus, the circuit components and the like are hermetically sealed.

In the case of such an airtight terminal, the lead terminal 3 and the ground terminal 6 are bent in a hook shape and mounted on a circuit board or the like.

However, a clearance is required so that the lead terminal 3 does not make a short circuit by contacting the bottom surface of the base 1, and there is a drawback that the occupied volume is increased. Due to the bending, bending, deformation, instability of bending position accuracy, and the like occur, which is a major obstacle when mounting the board.

In order to eliminate the above-mentioned drawbacks, as shown in FIG. 8, a projecting ground terminal 12 is formed integrally with a bottom 11 of a box-shaped base 1 and a lead terminal insertion hole 2 is formed in the bottom 11. Hook-shaped lead terminals 3
An airtight terminal sealed with glass 5 has also been developed (Japanese Utility Model Application No. 5-13690). The glass 5 has a bottom 1
1, the outer surface 31 of the lead terminal 3 and the top surface of the ground terminal 12 are provided so as to be flush with the glass surface 51.

According to the above-described hermetic terminal, since the ground terminal is provided integrally with the base, grounding is ensured, and it is not necessary to newly provide the ground terminal by brazing or welding. In addition, since the lead terminals are formed in a hook shape in advance and the outer portion is sealed with glass, there is no possibility of bending or deformation, and the positional accuracy is improved. Further, there is an advantage that dead space between the outer portion and the base is eliminated.

The above-mentioned hermetic terminal is shown in FIGS.
As shown in FIG. 0, after the box-shaped base 1 is formed from a flat plate material by a press press (see FIG. 9), the thickness of the bottom surface 11 is compressed from the direction of the bottom surface 11 of the base by a press press. It has been manufactured by a method of forming the protruding ground terminals 12. For this reason, the ground terminal 12 has a limitation in plastic working, and has a drawback that it is difficult to form the ground terminal 12 into a desired size (particularly height h) and shape.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a projection is provided on a bottom surface of a box-shaped base, and the height of the ground terminal is increased in an airtight terminal having the projection as a ground terminal. It is an object of the present invention to provide a hermetic terminal that can be used.

[0010]

Means for Solving the Problems In order to solve the above problems, the hermetic terminal according to the present invention is provided with a lead terminal insertion hole at the bottom of a box-shaped metal base to form an airtight terminal formed by the box-shaped metal base. the lead terminals so as to penetrate the space is inserted into the lead terminal insertion hole, to seal a glass
And projecting to the back of the bottom of the metal base.
In the airtight terminal provided with terminals, the ground terminal is
The glass is formed by pressing and projecting from the bottom direction on the bottom rear surface of the metal base, and the glass is
The lead terminal and the ground terminal
Is provided so that the top surface is flush with the glass.
Characterized in that that.

According to the hermetic terminal of the present invention, a projection is provided on the bottom surface of the box-shaped base, and the protruding ground terminal is formed by pressing the hermetic terminal from the bottom toward the hermetic terminal using the projection as a ground terminal. There is an advantage that the height of the ground terminal can be increased, and the degree of freedom in design can be increased.

[0012]

1 is a perspective view of a glass hermetic type surface mount hermetic terminal of an embodiment of the hermetic terminal of the present invention as viewed from the bottom, FIG. 2 is a sectional view, and FIG. 3 is a mounting view. As is clear from these figures, the hermetic terminal of the present invention has a protruding ground terminal 12 on the bottom 11 of the box-shaped base 1.
Are formed. This ground terminal 12 is connected to the airtight space 4.
Therefore, the recess 121 is formed on the airtight space 4 side. Further, since the ground terminal 12 is formed by being pressed and protruded from the airtight space 4, a step 13 is formed.

On the other hand, the lead terminal insertion hole 2 is
The hook-shaped lead terminal 3
Are inserted and sealed with glass 5. The glass 5
Is provided so that the top surfaces of the outer portion 31 of the lead terminal 3 and the ground terminal 12 are flush with the glass surface 51 over the entire surface of the bottom portion 12.

With such a structure, the ground terminal 12 is electrically connected to the base 1 and can be used as a ground. On the other hand, the lead terminal 3 is insulated from the base 1 by the glass 5.

FIG. 3 is a view when the hermetic terminal according to the present invention is mounted on a circuit board 8 or the like. As is clear from this figure, the step 13 becomes a pool of the solder 9 and enables good soldering. At the same time, the soldered state is visible and contributes to the improvement of reliability.

In manufacturing the above-described hermetic terminal, as shown in FIGS. 4 to 6, first, a flat plate-shaped material is manufactured by a conventional box-shaped pressing press (see FIG. 4). Next, by compressing the bottom surface of the base 1 as in the related art, the projections 12 are formed (FIG. 5), and the projections are pressed and projected from the direction of the airtight space 4 to form the ground terminals 12 (FIG. 6). ).

In this example, the bottom surface of the base is compressed to form the protrusion, and then the protrusion is further protruded. However, the step of compressing the base may be omitted.

In this example of the manufacturing method, the ground terminals are provided on the left and right, but it is apparent that the lead terminals and the ground terminals may be provided on the left and right as shown in FIG. That is, the position of the ground terminal and the lead terminal,
The number is not fundamentally limited in the present invention.

[0019]

As described above, according to the hermetic terminal of the present invention, the ground terminal is formed integrally with the metal base by pressing and pressing, so that the grounding is ensured and the brazing is performed. A process such as welding can be omitted, and a highly efficient and inexpensive hermetic terminal can be provided.
Furthermore, since the height of the ground terminal can be increased, the degree of freedom in designing the airtight terminal can be increased.

[Brief description of the drawings]

FIG. 1 is a bottom perspective view of one embodiment of a hermetic terminal according to the present invention.

FIG. 2 is a sectional view of the embodiment of the hermetic terminal according to the present invention.

FIG. 3 is an explanatory view of mounting the airtight terminal according to the present invention.

FIG. 4 is a diagram showing a method for manufacturing a hermetic terminal according to the present invention.

FIG. 5 is a diagram showing a method for manufacturing a hermetic terminal according to the present invention.

FIG. 6 is a diagram illustrating a method of manufacturing a hermetic terminal according to the present invention.

FIG. 7 is a sectional view of a conventional hermetic terminal.

FIG. 8 is a cross-sectional view of a conventional hermetic terminal.

FIG. 9 is a diagram showing a conventional method for manufacturing a hermetic terminal.

FIG. 10 is a diagram showing a conventional method for manufacturing a hermetic terminal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 11 Bottom part 12 Ground terminal 13 Step 3 Lead terminal 31 Outer part 4 Airtight space 5 Glass

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 9/16 101 H01R 4/64

Claims (1)

(57) [Scope of request for utility model registration] 1. A lead terminal insertion hole is provided at the bottom of a box-shaped metal base, and the lead terminal is inserted through the lead terminal insertion hole so as to penetrate an airtight space formed by the box-shaped metal base, and is formed by glass. Sealing and the gold
In a hermetic terminal having a ground terminal provided on a metal base bottom rear surface, the ground terminal is formed by pressing and projecting from the bottom direction on the bottom rear surface of the metal base.
Along with the glass over the entire bottom surface,
The top surface of the lead terminal and the ground terminal is made of glass.
An airtight terminal characterized by being provided on the same plane .