Airtight terminal and airtight container

Abstract

To provide an airtight terminal and an airtight container, which can achieve weight saving and miniaturization.SOLUTION: An airtight terminal comprises a metal base that has a hollow shank having an opening and a flange part extending outward from an outer edge of the opening, and a plurality of glass-sealed lead wires that are inserted through a plurality of through-holes, in the bottom of the shank, respectively. The plurality of through-holes are formed to pass through a plurality of protrusions provided on the bottom, respectively. The plurality of protrusions are provided to protrude in a thickness direction of the bottom and get away from one another in an opening direction of the opening.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an airtight terminal and an airtight container including the same. [Background technology]

[0002] The airtight container described in Patent Document 1 includes an airtight terminal and a metal cap, and the airtight terminal has a configuration in which lead wires inserted at a distance from each other and glass-sealed into a metal base having a body and a flange. The airtight container is formed by covering the body with the metal cap up to the flange of the metal base and sealing it by laser welding. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 2838832 specification Summary of the Invention [Problem to be solved by the invention]

[0004] Airtight terminals and airtight containers are used in various devices, and in some cases, multiple units are arranged side by side. For example, in a vibration-driven power generator, multiple airtight containers are arranged side by side as multiple electrodes, and an insulator serving as an electret slides over the multiple electrodes, changing the relative positions of the electrodes and the insulator, thereby inducing electrostatic induction, thereby generating electricity. When multiple airtight terminals and airtight containers are used side by side, as in such a vibration-driven power generator, there is a growing demand for reduced weight, installation area, and height of each airtight terminal and airtight container to improve portability, etc. The present invention was realized through extensive research by the inventors, who focused on reducing the weight and size of airtight terminals and airtight containers equipped therewith.

[0005] Therefore, an object of the present invention is to provide an airtight terminal and an airtight container that can be made even lighter and smaller. Another object of the present invention is to provide an airtight container that has a flat sealing member that covers the airtight terminal, thereby eliminating the need for a structure to escape from the roller electrode used in seam welding the sealing member to the airtight terminal, and that can form a flat surface on which an electret or the like can slide when multiple airtight containers are arranged side by side. [Means for solving the problem]

[0006] In order to solve the above problems, the airtight terminal of the present invention is an airtight terminal comprising a metal base having a hollow body portion with an opening and a flange portion extending outward from the outer edge of the opening, and a plurality of lead wires that are inserted into a plurality of through holes at the bottom of the body and glass-sealed, wherein the plurality of through holes are formed so as to respectively pass through a plurality of protrusions provided on the bottom, and the plurality of protrusions protrude in the thickness direction of the bottom and are provided spaced apart from each other in the opening direction of the opening.

[0007] In the hermetic terminal of the present invention, the opening is square-shaped, the bottom portion has a square-shaped flat bottom surface corresponding to the opening, and the bottom surface has an element placement area in the center.

[0008] In the airtight terminal of the present invention, the element placement area is arranged at a 45-degree angle relative to the center of the square base, and has a square shape smaller than the bottom, and the multiple protrusions are formed in areas facing the four sides of the square of the element placement area.

[0009] In the airtight terminal of the present invention, the body portion has a uniform thickness excluding the plurality of protrusions, and the thickness is the same as that of the flange portion.

[0010] In the hermetic terminal of the present invention, the protruding portion protrudes from the bottom portion to the outside of the body portion, and the protruding height is greater than the thickness of the bottom portion.

[0011] In the hermetic terminal of the present invention, the protruding portion protrudes from the bottom portion into the body portion, and the protruding height is greater than the thickness of the bottom portion.

[0012] The airtight container of the present invention is an airtight container comprising an airtight terminal and a metal lid portion that seals the airtight terminal, wherein the airtight terminal comprises a metal base having a hollow body portion with an opening and a flange portion extending outward from the outer edge of the opening, and a plurality of lead wires at the bottom of the body portion that are inserted into a plurality of through holes and glass-sealed, the lid portion is flat and placed on the flange portion to seal the body portion, the plurality of through holes are formed so as to respectively pass through a plurality of protrusions provided on the bottom portion, and the plurality of protrusions protrude in the thickness direction of the bottom portion and are spaced apart from each other in the opening direction of the opening.

[0013] In the airtight container of the present invention, the opening is square-shaped, the flange portion extends outward from each of the four sides of the square opening by the same length and has a square outer shape, the bottom portion has a bottom surface which is a square plane corresponding to the opening, the bottom surface has an element placement area in its center, and the lid portion has a square shape corresponding to the square shape formed by the flange portion and is placed on the flange portion.

[0014] In the airtight container of the present invention, the element placement area is arranged at a position rotated 45 degrees about the center of the square bottom surface, and has a square shape smaller than the bottom surface, and the multiple protrusions are formed in areas facing the four sides of the square element placement area.

[0015] In the airtight container of the present invention, the body portion has a uniform thickness excluding the plurality of protrusions, and the thickness is the same as that of the flange portion.

[0016] In the airtight container of the present invention, the protrusion protrudes from the bottom to the outside of the body, and the protruding height is greater than the thickness of the bottom.

[0017] In the airtight container of the present invention, the protrusion protrudes from the bottom into the body, and the protruding height is greater than the thickness of the bottom. [Effects of the Invention]

[0018] According to the present invention, it is possible to achieve even lighter weight and smaller size than conventional airtight terminals and airtight containers. In addition, by making the sealing member covering the airtight terminal flat, a structure for retracting from the roller electrode used in seam welding the sealing member to the airtight terminal is not required, and when multiple airtight containers are arranged side by side, it is possible to provide an airtight container that can form a flat surface on which an electret or the like can slide. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a top view showing a configuration of an airtight container according to an embodiment of the present invention. [Figure 2] 1 is a top view showing a configuration of an airtight terminal according to an embodiment of the present invention; [Figure 3] FIG. 2 is a cross-sectional view taken along line AA' in FIG. [Figure 4] FIG. 2 is a cross-sectional view taken along line BB′ in FIG. [Figure 5] FIG. 4 is an enlarged view of part C in FIG. 3. [Figure 6] FIG. 10 is a cross-sectional view showing the configuration of a hermetic terminal according to a modified example. [Figure 7] FIG. 10 is a cross-sectional view showing the configuration of a hermetic terminal according to a modified example. [Figure 8] 1A is a top view of the airtight terminal of the embodiment, and FIG. 1B is a cross-sectional view of the airtight container of the embodiment shown in FIG. [Figure 9] 1A is a top view of a hermetic terminal of a comparative example, FIG. 1B is a side view of the comparative example shown in FIG. 1A, with a portion thereof shown in cross section, and FIG. 1C is a cross-sectional view of the lid of the comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, an airtight terminal and an airtight container according to an embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a top view showing the configuration of an airtight container 10 according to this embodiment, Fig. 2 is a top view showing the configuration of an airtight terminal 20 provided in the airtight container 10 of Fig. 1, Fig. 3 is a cross-sectional view taken along line A-A' in Fig. 1, Fig. 4 is a cross-sectional view taken along line B-B' in Fig. 1, and Fig. 5 is an enlarged view of part C in Fig. 3. In the following description, the up-down direction in Figs. 3, 4, and 5 will be referred to as the up-down direction or the height direction, but the arrangement orientation of the airtight container 10 and the airtight terminal 20 in actual use is not limited to this direction.

[0021] <Airtight container> As shown in FIGS. 1, 3, and 4, the airtight container 10 includes an airtight terminal 20 and a metal lid portion 60 that seals the airtight terminal 20. The lid portion 60 has a square, flat plate shape that corresponds to the outline of the flange portion 32 of the metal base 30 of the hermetic terminal 20, which will be described later, when viewed from above. Therefore, the lid portion 60 overlaps the outline of the flange portion 32 without protruding from the outline, and seals the space surrounded by the body portion 31. The lid portion 60 is joined to the flange portion 32 by seam welding, and seals the internal space of the body portion 31. From the viewpoint of ensuring sealing performance, it is preferable to use Kovar (a trademark, an alloy of iron, nickel, and cobalt) for the lid portion 60.

[0022] The square shape as the planar shape of the lid portion 60 and the square shape as the planar outer shape of the flange portion 32 includes a shape in which the four corners of the square are rounded with a curvature radius within a predetermined range, as shown in Fig. 1, and the predetermined range is set according to the specifications required for the airtight container 10, and the corners may also be unrounded. The lid portion 60 and the flange portion 32 may also be rectangular shapes other than a square.

[0023] <Airtight terminal> As shown in FIGS. 1 to 4, the hermetic terminal 20 includes a metal base 30 and three lead wires 41, 42, and 43.

[0024] The metal base 30 is formed by drawing and includes a hollow body 31 having a square-shaped opening 31a at its top, and flanges 32 extending outward from the outer edges of the opening 31a (the upper part of the outer surface 31c of the body 31). In other words, the metal base 30 has an opening 31a at its top and a concave shape recessed downward. As shown in FIG. 2, the flanges 32 extend to form a square shape. Similar to the lid 60, the metal base 30 is preferably made of Kovar or 42 alloy to ensure sealing performance and facilitate the formation of the protrusions 34, 35, and 36. The 42 alloy is an alloy containing iron and nickel. The alloy may be 57% iron and 42% nickel by weight, or may contain copper and manganese, or may be composed solely of iron and nickel.

[0025] The body 31 extends in the vertical direction (vertical direction in FIG. 3), and the bottom 33 has, as its upper surface, a square bottom surface 33a corresponding to the opening 31a. As shown in FIG. 2, a square element placement area 70, which is rotated 45 degrees about the center 33c of the square bottom surface 33a of the bottom 33 and is smaller than the bottom surface 33a, is set in the center of the square. Elements depending on the application of the hermetic terminal 20 are placed in this element placement area 70.

[0026] Cylindrical protrusions 34, 35, and 36 are provided in regions facing three of the four square sides of the element placement region 70 and away from the inner surface 31b of the body 31. The protrusions 34, 35, and 36 are formed by burring three through-holes provided in the bottom 33, so that they protrude downward from the bottom 33, i.e., protrude outward from the body 31. Through-holes 37, 38, and 39 are formed inside the protrusions 34, 35, and 36, penetrating the bottom 33 in its thickness direction, i.e., the vertical direction in FIG. 3 (see FIGS. 3 and 5). The through-holes 37, 38, and 39 connect the external space below the metal base 30 to the internal space 31s of the body 31. The protrusions 34, 35, and 36 are spaced apart from one another in the opening direction of the opening 31a (the direction of the paper in FIG. 2).

[0027] Three lead wires 41, 42, 43 are inserted into the through holes 37, 38, 39, respectively, and are glass-sealed. The upper ends of the lead wires 41, 42, 43 extend to predetermined positions within the internal space 31s formed by the body 31 so as not to contact the lid 60, and the lower ends extend outward below the metal base 30. Inside the body 31, the lead wires 41, 42, 43 are electrically connected to the element arranged in the element arrangement region 70 by wire bonding or other means depending on the application of the airtight terminal 20, etc.

[0028] In the glass sealing, three lead wires 41, 42, and 43 are inserted into the through holes 37, 38, and 39, and then the through holes 37, 38, and 39 are sealed airtightly and insulated with glass 50 (see FIGS. 3 and 5). Examples of the glass 50 used for sealing include borosilicate glass, and it is preferable to use Kovar for the lead wires 41, 42, and 43.

[0029] The body 31 has the same thickness except for the three protrusions 34, 35, and 36, and is the same thickness as the flange 32. It is preferable to form the body 31 and the flange 32 to have the thinnest thickness possible within the range that satisfies the strength required for the airtight container 10, because this allows the airtight terminal 20 to be lightweight.

[0030] The protrusions 34, 35, and 36 protrude downward from the bottom 33 of the body 31, i.e., to the outside of the body 31, and their height in the vertical direction (vertical direction in FIG. 3 ) is greater than the thickness of the bottom 33. The height and inner diameter of the protrusions 34, 35, and 36 are set depending on the physical properties of the glass 50, the shape, weight, and physical properties of the lead wires 41, 42, and 43, and the specifications for airtightness and insulation of the airtight terminal 20. If the height of the protrusions 34, 35, and 36 were the same as the thickness of the body 31 and the flange 32, the fixing strength of the lead wires 41, 42, and 43 would not be ensured. Therefore, the height of the protrusions 34, 35, and 36 is ensured by protruding them below the bottom 33 using burring. In the examples shown in Figures 3 and 5, the thickness of the walls of the protrusions 34, 35, and 36 surrounding the through holes 37, 38, and 39 is the same as the thickness of the body 31, but the weight can be reduced by making the thickness thinner than the thickness of the body 31.

[0031] In the above configuration, the lid portion 60 is joined to the body portion 31 by seam welding. This allows for a highly airtight seal. Because the lid portion 60 is a flat plate, no additional structure is required to allow for escape from the seam welding electrodes. This prevents the airtight terminal 20 from becoming larger and allows for a lighter weight.

[0032] Furthermore, the element placement area 70 is rotated 45 degrees relative to the opening 31a of the body 31, and the protrusions 34, 35, 36 and the through holes 37, 38, 39 are arranged facing the four sides of the square element placement area 70. As a result, compared to a conventional airtight terminal that is not rotated 45 degrees, the area of ​​the bottom surface 33b and the external size of the flange portion 32 can be reduced without changing the spacing between the lead wires 41, 42, 43 and the area of ​​the element placement area 70, thereby reducing the installation area by about half and enabling the weight of the airtight terminal 20 to be reduced.

[0033] Furthermore, by making the thickness of the body 31 and flange 32 as thin as possible while still ensuring strength, and making the height of the protrusions 34, 35, and 36 greater than this thickness, it is possible to simultaneously ensure the overall strength of the airtight terminal 20 or airtight container 10 and the fixing strength of the lead wires 41, 42, and 43, while also achieving weight reduction.

[0034] In contrast, in conventional airtight terminals, the through holes are formed by punching, so the periphery of the through holes does not protrude in the thickness direction. Therefore, in order to ensure the fixing strength of the lead wire, the thickness of the entire metal base must be increased, making it difficult to achieve weight reduction. In a metal base of this shape, when a device is placed on top of it, the lid must be hat-shaped to avoid the device and the wiring for electrical connection to the device, which results in a problem of increased height.

[0035] In this embodiment, by forming the metal base 30 into a concave shape, the shape of the lid portion 60 can be made flat, and the area of ​​the flange portion 32 can be made smaller than in the past. Furthermore, by making the lid portion 60 flat, it is possible to reduce the amount of material used, the number of manufacturing steps, and the manufacturing cost compared to the above-mentioned conventional hat-shaped lid portion. In addition, by rotating the element placement area 70 by 45 degrees and by making the thickness of the body portion 31 and the flange portion 32 thinner than the height of the protrusions 34, 35, and 36, it is possible to reduce the overall weight of the airtight container 10 to about 1 / 5 of that of the conventional airtight container.

[0036] Furthermore, while conventional airtight terminals use iron as the material for the metal base that is suitable for punching, the metal base 30 of the above embodiment uses Kovar or 42 alloy, which has a higher specific gravity than iron, in consideration of airtightness, etc., and by setting the thickness of the body 31 and flange 32 and the height of the protrusions 34, 35, and 36, it is possible to achieve durability and airtightness against burring processing while also achieving weight reduction.

[0037] Furthermore, in this embodiment, a flat, square lid portion 60 is used, and the shapes of this lid portion 60 and the flange portion 32 correspond to each other, so that the airtight containers 10 can be arranged side by side with each side of the square of the lid portion 60 in contact with each side of the square of the adjacent lid portion 60, and therefore, a plurality of airtight containers 10 can be arranged side by side in a compact manner. Furthermore, in this juxtaposed state, the adjacent lid portions 60 come into contact with each other to form a large plane, so that, for example, the juxtaposed airtight containers can be set as a plurality of electrodes and an insulator as an electret can be smoothly slid over these electrodes.

[0038] (Variation) In the above embodiment, three lead wires 41, 42, and 43 are disposed, but the number of lead wires may be one, two, or four or more, and protrusions are formed accordingly. When 1 to 4 lead wires are disposed, they are disposed so that one is opposed to each side of the element placement region 70, and when five or more lead wires are disposed, they are disposed evenly so that the number of lead wires opposed to each side of the element placement region 70 is the same, or when the number of lead wires cannot be made equal, they are disposed so that just one more is opposed to any side, thereby making it possible to keep the size of the bottom surface 33a of the bottom 33 small.

[0039] In the above embodiment, the opening shape of the opening 31a of the body 31 and the shape of the element placement area are square, but the shapes are not limited to this and may be rectangular, polygonal, circular, or elliptical other than a square.

[0040] In the above-described embodiment, the protrusions 34, 35, and 36 are cylindrical. However, when the metal base 30 is made of Kovar, the shape of the protrusions is not limited to cylindrical, and can be, for example, a cylindrical, prismatic, or hemispherical shape other than cylindrical, as long as the lead wires 41, 42, and 43 are insulated from the metal base 30 by the glass 50, extend in the vertical direction, and are arranged so as to protrude in the thickness direction of the bottom 33 of the body 31.

[0041] In the above embodiment, the metal base 30 is formed by drawing, and the protrusions 34, 35, and 36 are formed by burring, but they can also be manufactured by other manufacturing methods. For example, the metal base 30, including the protrusions 34, 35, and 36, may be formed by molding.

[0042] Furthermore, in the above embodiment, the protrusions 34, 35, and 36 protrude downward from the bottom 33 of the metal base 30 and do not protrude into the body 31, but as long as the fixing strength of the lead wires 41, 42, and 43 can be ensured and electrical connection with the element to be placed in the element placement area 70 can be reliably established, the protrusions can also be shaped to protrude into the body 31 or to protrude both into the body 31 and below the bottom 33.

[0043] 6 and 7 are cross-sectional views showing the configuration of a modified hermetic terminal 120. In this hermetic terminal 120, protrusions 134, 135, and 136 protrude into the body 131, i.e., into the internal space 131s. Here, Fig. 6 is a cross-sectional view of the hermetic terminal 120 at a position corresponding to Fig. 3, and Fig. 7 is a cross-sectional view of the hermetic terminal 120 at a position corresponding to Fig. 4.

[0044] In the hermetic terminal 120 shown in Figures 6 and 7, a body 131 is formed in the same manner as the hermetic terminal 20 shown in Figures 3 to 5. By performing burring on three through holes 137, 138, and 139 provided in a bottom 133, protrusions 134, 135, and 136 are formed, protruding upward from the bottom 133, i.e., toward the inside of the body 131, in the thickness direction of the bottom 133 (the vertical direction in Figures 6 and 7). In other words, the protrusions 134, 135, and 136 extend into an internal space 131s of the body 131. The insertion of three lead wires 141, 142, and 143 into the through holes 137, 138, and 139 and the glass sealing are performed in the same manner as the hermetic terminal 20 shown in Figures 3 to 5.

[0045] In the airtight terminal 120 shown in Figures 6 and 7, in addition to the effects obtained by the airtight terminal 20 shown in Figures 3 to 5, the protrusions 134, 135, and 136 protrude inward from the body 131, making it possible to reduce the vertical size of the metal base 130, and since the upper ends of the lead wires 141, 142, and 143 are positioned higher within the internal space 131s formed by the body 131 than in the configuration shown in Figures 3 to 5, the vertical size of the airtight terminal 120 including the lead wires 141, 142, and 143 can also be reduced.

[0046] (Example) FIG. 8(A) is a top view of an airtight terminal 20 according to one example of the above embodiment, and corresponds to FIG. 2, and FIG. 8(B) is a cross-sectional view of the airtight container 10 according to the example shown in (A), and corresponds to FIG. 3.

[0047] In the airtight terminal 20 according to this embodiment, the metal base 30 is formed by drawing Kovar, and the protrusions 34, 35, and 36 are formed by burring. The lead wires 41, 42, and 43 are formed from Kovar, and borosilicate glass is used as the glass 50 for sealing the lead wires 41, 42, and 43.

[0048] The shape of the airtight terminal according to this example is as shown in FIGS. 8(A) and 8(B), and the numerical values ​​of each shape are as follows. Length L1 of each side of the square-shaped opening 31a of the body 31: 10 mm The length of each side of the square flange 32 L2: 12.4 mm Distance L3 between the opposing leads 41 and 43 across the element placement area 70: 8 mm Distance L4 between adjacent lead wires 41 and 42: 4 mm The length of each side of the square element placement area 70 is L5: 5 mm Through hole inner diameter L6: 3mm Through hole depth L7: 1.2 mm Thickness L8 of the body 31, flange 32, bottom 33, and protrusions 34, 35, and 36: 0.25 mm Depth L9 of body 31: 3 mm Length of lead wires 41 and 42 L10: 8.75 mm Outer diameter L11 of lead wires 41 and 42: 0.5 mm Length L12 of the lead wires 41, 42 extending downward from the protrusions 34, 35, 36: 7.05 mm Thickness of lid 60 L13: 0.1 mm

[0049] (Comparative Example) Figure 9(A) is a top view of the airtight terminal 120 of the comparative example, Figure 9(B) is a side view of the comparative example shown in (A), showing a cross section of the protrusion on the right side, and Figure 9(c) is a cross section of the lid portion 160 of the comparative example. In the airtight terminal 120 according to the comparative example, the metal base 130 was formed by punching iron, and the through holes 137 and 138 were also formed at the same time as punching the metal base 130. The lead wires 141 and 142 were made of Kovar, and the lead wires 141 and 142 were sealed with glass.

[0050] The shape of the hermetic terminal 120 according to the comparative example is as shown in FIGS. 9(A), (B), and (C), and the numerical values ​​of each shape are as follows. Height L21 of the internal space of the hat-shaped lid 160: 3.8 mm Length of each side of the interior of the lid 160 L22: 13.1 mm Length of each side of the outer diameter of the lid part 160 L23: 17.8 mm The length of each side of the square body 131 is L24: 13 mm The length of each side of the square flange portion 132 is L25: 18.2 mm Distance L26 between the opposing lead wires 141 and 142 across the element placement area 170: 8 mm Distance L27 between adjacent lead wires 141 and 143: 2.54 mm The length of each side of the square element placement area 170 is L28: 5 mm Through hole inner diameter L29: 1.8 mm Depth of through hole (thickness of body 131) L30: 1.6 mm Thickness L31 of flange portion 132: 0.5 mm Width of flange 132 L32: 5.2 mm Length of lead wires 141 and 142: L33: 8.75 mm Outer diameter L34 of lead wires 141 and 142: 0.5 mm Length L35 of the lead wires 141 and 142 extending downward from the metal base 130: 6.65 mm Thickness of lid 160 L36: 0.3 mm

[0051] The shape and weight of the example and comparative example are compared as follows. Installation area of ​​the airtight container 10 of the embodiment: L2 × L2 = 153.76 mm2 Height of the airtight container 10 in the embodiment: L7 + L9 + L12 = 11.25 mm Installation area of ​​the airtight terminal 120 of the comparative example: L25 × L25 = 331.24 mm Height of the airtight container in the comparative example: L21 + L31 + L35 + L36 = 11.25 mm Here, as can be seen from Figures 9(A), (B), and (C), the lid portion 160 of the comparative example has an installation area smaller than the installation area of ​​the airtight terminal 120, so the installation area of ​​the comparative example as an airtight container is the same as the installation area of ​​the airtight terminal 120. Thus, according to the configuration of the example, the installation area could be reduced to less than half of that of the comparative example, despite the configuration having the same height.

[0052] Furthermore, the thickness L13 of the lid portion 60 is 1 / 3 of the thickness L36 of the lid portion 160, and the thickness L8 of the portion of the metal base 30 other than the protrusions 34, 35, and 36 is 0.25 / 1.6 times (approximately 1 / 8) the thickness L30 of the body portion 131, making the overall thickness significantly thinner.

[0053] As mentioned above, the installation area and thickness were significantly reduced, and the weight of the airtight container was also reduced to less than one-fifth, as shown below. Weight of the airtight container 10 of the embodiment: 3.8 g Weight of the airtight container of the comparative example: 0.67 g

[0054] Therefore, in a configuration in which airtight containers are used side by side, for example, when 100 or more containers are lined up, a significant difference can be achieved in terms of installation area and weight, making it possible to construct equipment etc. in which airtight containers twice the size of conventional equipment are placed in an area that weighs less than half. Although the present invention has been described with reference to the above-mentioned embodiment, the present invention is not limited to the above-mentioned embodiment, and improvements or modifications can be made within the scope of the invention or the spirit of the invention. [Explanation of symbols]

[0055] 10 Airtight Container 20, 120 Airtight Terminal 30, 130 Metal base 31, 131 Torso 31a aperture 31b Inside 31c External surface 31s, 131s interior space 32 Flange 33, 133 bottom 33a Bottom 33c Center of the base 34, 35, 36, 134, 135, 136 protrusion 37, 38, 39, 137, 138, 139 Through holes 41, 42, 43, 141, 142, 143 Lead wires 50 Glass 60 Lid 70 Element placement area

Claims

1. a metal base having a hollow body portion with an opening and a flange portion extending outward from an outer edge of the opening; a plurality of lead wires that are inserted into the plurality of through holes at the bottom of the body and are glass-sealed; A hermetic terminal comprising: the plurality of through holes are formed so as to penetrate through a plurality of protrusions provided on the bottom portion, The plurality of protrusions protrude in a thickness direction of the bottom portion and are spaced apart from one another in an opening direction of the opening. A hermetic terminal characterized by:

2. the opening is square; the bottom portion has a square flat bottom surface corresponding to the opening, The bottom surface has an element placement area at its center.

2. The hermetic terminal according to claim 1.

3. the element placement region is arranged at a position rotated 45 degrees about the center of the square of the base surface, and has a square shape smaller than the base surface; The plurality of protrusions are formed in regions facing the four sides of the square element arrangement region.

3. The hermetic terminal according to claim 2.

4. The body portion has a uniform thickness except for the plurality of protrusions, and is the same thickness as the flange portion.

2. The hermetic terminal according to claim 1.

5. The protruding portion protrudes from the bottom to the outside of the body portion, and the protruding height is greater than the thickness of the bottom portion.

2. The hermetic terminal according to claim 1.

6. The protrusion protrudes from the bottom into the body, and the protruding height is greater than the thickness of the bottom.

2. The hermetic terminal according to claim 1.

7. An airtight container comprising an airtight terminal and a metal lid portion that seals the airtight terminal, The airtight terminal is a metal base having a hollow body portion with an opening and a flange portion extending outward from an outer edge of the opening; a plurality of lead wires that are inserted into the plurality of through holes at the bottom of the body and are glass-sealed; Equipped with the lid portion is placed on the flange portion and has a flat plate shape to seal the body portion, the plurality of through holes are formed so as to penetrate through a plurality of protrusions provided on the bottom portion, The plurality of protrusions protrude in a thickness direction of the bottom portion and are spaced apart from one another in an opening direction of the opening. An airtight container characterized by:

8. the opening is square; the flange portion extends outward from each of the four sides of the square of the opening by the same length, and has a square outer shape; the bottom portion has a square flat bottom surface corresponding to the opening, the bottom surface has an element placement area at its center, The lid portion has a square shape corresponding to the square shape formed by the flange portion and is placed on the flange portion.

8. The airtight container according to claim 7.

9. the element placement region is arranged at a position rotated 45 degrees about the center of the square of the base surface, and has a square shape smaller than the base surface; The plurality of protrusions are formed in regions facing the four sides of the square element arrangement region.

9. The airtight container according to claim 8.

10. The body portion has a uniform thickness except for the plurality of protrusions, and is the same thickness as the flange portion.

8. The airtight container according to claim 7.

11. The protruding portion protrudes from the bottom to the outside of the body portion, and the protruding height is greater than the thickness of the bottom portion.

8. The airtight container according to claim 7.

12. The protrusion protrudes from the bottom into the body, and the protruding height is greater than the thickness of the bottom.

8. The airtight container according to claim 7.

Images