JP7420577B2 - Optical devices and optical modules - Google Patents

Description

The present invention relates to an optical device and an optical module.

Conventionally, an optical device having a lead terminal capable of relieving stress is known (Patent Document 1).

Japanese Patent Application Publication No. 2014-149474

Atsushi Yamamoto, Takeo Okaniwa, Yoshiki Yafuso, Masayoshi Nishida, “Development of compact ITLA for optical digital coherent communication”, Furukawa Electric Times, No. 134, (January 2015), pp. 2-6

In this type of optical device, it would be beneficial if the stress acting on the lead terminals could be made smaller.

One of the objects of the present invention is, for example, to obtain an optical device and an optical module that can further reduce the stress acting on the lead terminals.

The optical device of the present invention includes, for example, an optical module having a first conductor, a substrate having a second conductor, and a lead terminal electrically connecting the first conductor and the second conductor. , the lead terminal extends between a first fixing part fixed to the first conductor, a second fixing part fixed to the second conductor, and the first fixing part and the second fixing part. an intermediate part, the intermediate part being located between the first fixing part and the second fixing part and visually intersecting an imaginary straight line passing through the first fixing part and the second fixing part. a first bent part that bends in a first curved direction that is one of clockwise and counterclockwise as it approaches the second fixed part when viewed in the direction; and a first bent part and the second fixed part; a second bending part located between the second bending part and bending in a second curved direction which is the other of the clockwise direction and the counterclockwise direction as it approaches the second fixed part when viewed in the viewing direction; and the second bending part and a third bending part located between the second fixing part and the third bending part that bends in the first curved direction as it approaches the second fixing part when viewed in the viewing direction.

Further, in the optical device, for example, the substrate has a first surface facing the first direction, a second surface facing the opposite direction to the first direction, and the second surface provided on the first surface. It has a plurality of third conductors as conductors and a plurality of fourth conductors as the second conductors provided on the second surface, each of which is electrically connected to the third conductor as the lead terminal. and a plurality of second lead terminals each electrically connected to the fourth conductor.

Further, in the optical device, for example, the optical module includes a plurality of fifth conductors as the first conductors each electrically connected to the first lead terminal, and a plurality of fifth conductors each electrically connected to the second lead terminal. a plurality of sixth conductors as the first conductors connected to each other, and the fifth conductor and the sixth conductor are shifted in the first direction.

Further, the optical device of the present invention includes, for example, an optical module having a first conductor, a substrate having a first surface facing the first direction, and a second conductor provided on the first surface. , a lead terminal electrically connecting the first conductor and the second conductor, the lead terminal having a first fixing part fixed to the first conductor and a first fixing part fixed to the second conductor. a second fixing part extending between the first fixing part and the second fixing part, the intermediate part extending from the first fixing part and the second fixing part to the second fixing part; It has bent parts separated in one direction.

Further, in the optical device, for example, the intermediate portion may include a fourth bending portion that bends in the first direction as it approaches the second fixing portion, and a fourth bending portion that bends in the first direction as it approaches the first fixing portion. and a fifth bent portion that bends toward the front.

Further, in the optical device, for example, a gap is provided between the optical module and the substrate, and the lead terminal is partially located within the gap.

Further, the optical module of the present invention includes, for example, a body, and a lead terminal fixed to the body and electrically connected to a second conductor provided on a substrate, and the lead terminal is connected to the body. A first fixing part fixed to the second conductor, a second fixing part fixed to the second conductor, and an intermediate part extending between the first fixing part and the second fixing part, the intermediate part is located between the first fixing part and the second fixing part, and is the second fixing part when viewed in a viewing direction intersecting an imaginary straight line passing through the first fixing part and the second fixing part. a first bent part that bends in a first curved direction, which is one of clockwise and counterclockwise as it approaches, and a first bent part that is located between the first bent part and the second fixed part when viewed in the viewing direction; a second bent part that bends in a second curved direction, which is the other of the clockwise and counterclockwise directions, as it approaches the second fixed part; and a second bent part that is located between the second bent part and the second fixed part. and a third bent portion that bends in the first curved direction as it approaches the second fixed portion when viewed in the viewing direction.

According to the present invention, for example, since the lead terminals can be made longer, it is possible to obtain an optical device and an optical module that can further reduce the stress acting on the lead terminals.

FIG. 1 is an exemplary and schematic side view of the optical device of the first embodiment. FIG. 2 is an enlarged view of a portion of FIG. 1. FIG. 3 is an exemplary and schematic side view of the optical module of the optical device according to the first embodiment, and the conductors and lead terminals of the substrate, as viewed in the direction D3 in FIG. 1. FIG. 4 is an exemplary and schematic side view of the optical device of the second embodiment. FIG. 5 is an enlarged view of a portion of FIG. 4. FIG. 6 is an exemplary and schematic side view of the optical module of the optical device according to the second embodiment, and the conductors and lead terminals of the substrate, as viewed in the D5 direction in FIG. 4. FIG. 7 is an exemplary and schematic side view at the same position as FIG. 6 showing the optical module and the conductors and lead terminals of the substrate of the optical device according to the modified example of the second embodiment. FIG. 8 is an exemplary and schematic side view of the optical device of the third embodiment. FIG. 9 is an exemplary and schematic plan view of the optical device of the fourth embodiment. FIG. 10 is an exemplary and schematic side view of the optical device of the fifth embodiment.

Exemplary embodiments and variations of the invention are disclosed below. The configurations of the embodiments and modified examples shown below, as well as the actions and results (effects) brought about by the configurations, are examples. The present invention can be realized by configurations other than those disclosed in the following embodiments and modified examples. Further, according to the present invention, it is possible to obtain at least one of various effects (including derivative effects) obtained by the configuration.

The embodiments and modifications shown below have similar configurations. Therefore, according to the configurations of the respective embodiments and modified examples, similar operations and effects based on the similar configurations can be obtained. Furthermore, hereinafter, similar configurations are given the same reference numerals, and redundant explanations may be omitted.

In this specification, ordinal numbers are given for convenience to distinguish parts, parts, etc., and do not indicate priority or order.

In each figure, the X direction is represented by an arrow X, the Y direction is represented by an arrow Y, and the Z direction is represented by an arrow Z. The X direction, Y direction, and Z direction intersect each other and are orthogonal to each other. Note that the Z direction may also be referred to as the thickness direction or the normal direction to the surface of the substrate.

[First embodiment]
FIG. 1 is a side view of an optical device 1A of this embodiment. The optical device 1A includes a base 10, an optical module 20, a circuit board 30, and lead terminals 40A.

The base 10 functions as a support member for the optical module 20 and the circuit board 30. Further, the base 10 is made of a metal material with high thermal conductivity, and functions as a heat radiating member that radiates heat generated in each part, especially the optical module 20. The base 10 has a plate-like shape that extends perpendicularly to and intersects with the Z direction.

The optical module 20 has a body 21. The optical module 20 is, for example, a wavelength tunable semiconductor laser module in which a wavelength tunable semiconductor laser element (not shown) is built into the body 21 . However, the optical module 20 is not limited thereto, and may include optical elements such as a light receiving element, a modulator, a semiconductor optical amplifier, and the like. The body 21 may also be referred to as a case or a housing.

As an example, the lead terminal 40A may be integrated with the optical module 20. In this case, the optical module 20 has a body 21 and lead terminals 40A. Further, as another example, the lead terminal 40A may be attached between the optical module 20 and the circuit board 30 when assembling the optical device 1A.

The optical module 20 outputs a laser beam having a desired wavelength and power from an optical fiber (not shown). The optical module 20 has a configuration in which a wavelength tunable semiconductor laser element, a plurality of semiconductor lasers, an optical combiner, and a semiconductor optical amplifier are integrated, as disclosed in Non-Patent Document 1, for example. Further, the optical module 20 has a known wavelength locking mechanism for controlling the wavelength of the wavelength tunable semiconductor laser element. Further, the optical module 20 includes a temperature control element and a temperature monitor element for controlling the temperature of the wavelength tunable semiconductor laser element.

Components 31 such as electronic components and electrical components are mounted on the circuit board 30. The conductor of the circuit board 30 and the component 31 constitute a control circuit of the optical module 20. The control circuit supplies a drive current to the optical module 20 based on various monitor signals output from the optical module 20, and controls the operation of the optical module 20. The control circuit includes, for example, a digital arithmetic unit, a memory, a current control circuit, a temperature monitor circuit, an optical power monitor circuit, a wavelength monitor circuit, and the like. The circuit board 30 is an example of a board.

The circuit board 30 includes an insulator (not shown) and a conductor. The circuit board 30 includes, as conductors, a conductor (not shown) inside the circuit board 30 and a conductor 32 exposed outside the circuit board 30. The circuit board 30 is, for example, a rigid board or a multilayer board. However, the present invention is not limited thereto, and the circuit board 30 may be a single-sided board, a double-sided board, or a flexible board.

The circuit board 30 extends across and perpendicularly to the Z direction. Further, the circuit board 30 has a surface 30a that is an end in the Z direction, and a surface 30b that is an end in the opposite direction to the Z direction. The surface 30a faces the Z direction, intersects with the Z direction, and is perpendicular to the Z direction. The surface 30b faces in the opposite direction to the Z direction, intersects with the Z direction, and is perpendicular to the Z direction. Surface 30b is approximately parallel to surface 30a. The surface 30a is an example of the first surface, and the surface 30b is an example of the second surface. Further, the Z direction is an example of the first direction.

Further, the circuit board 30 has an edge 30c. FIG. 1 shows an edge 30c along the Y direction at the end in the X direction. The edge 30c may also be referred to as an end or a side surface.

Component 31 is mounted on both surface 30a and surface 30b. A gap G1 is provided between the circuit board 30 and the base 10 in order to secure a space for the component 31 mounted on the surface 30b. Note that an inclusion, such as thermally conductive grease or a thermally conductive sheet, may be present in the gap G1.

The lead terminal 40A electrically connects the conductor 22 of the optical module 20 and the conductor 32 of the circuit board 30. The lead terminal 40A is a conductor through which signals and power are exchanged between the optical module 20 and the circuit board 30. The lead terminal 40A has, for example, a bent elongated plate shape or a columnar shape, and is made of a conductive metal material such as a copper-based material or an aluminum-based material. The lead terminal 40A can be made, for example, by general machining such as pressing, bending, and cutting.

The circuit board 30 inputs, for example, a drive current for a wavelength tunable semiconductor laser element or a temperature adjustment element to the optical module 20 via a lead terminal 40A. Further, the optical module 20 outputs, for example, an optical power monitor signal and a wavelength monitor signal in the wavelength lock mechanism to the circuit board 30 via the lead terminal 40A.

The optical device 1A includes a plurality of lead terminals 40A. The plurality of lead terminals 40A are lined up in the Y direction at predetermined intervals, for example, at equal intervals, along the edge 30c of the circuit board 30 along the Y direction. Further, the lead terminal 40A is bent along the XZ plane.

Further, as shown in FIG. 1, the optical device 1A has two types of lead terminals 410S and 410L, which have different shapes and lengths, as the lead terminals 40A. The position where the short lead terminal 410S is connected to the body 21 of the optical module 20 is away from the position where the long lead terminal 410L is connected to the body 21 in the Z direction.

Further, a gap G2 is provided between the side surface 20a of the optical module 20 and the edge 30c of the circuit board 30, and the lead terminals 40A (410S, 410L) are at least partially located within the gap G2. There is.

FIG. 2 is an enlarged view of a portion of FIG. 1, showing a portion of the optical module 20, a lead terminal 410S, and a portion of the circuit board 30.

The lead terminal 410S electrically connects the conductor 22 of the optical module 20 and the conductor 32 of the circuit board 30. The conductor 22 is an example of a first conductor, and the conductor 32 is an example of a second conductor.

The lead terminal 410S has a fixed part 411 fixed to and electrically connected to the conductor 22, and a fixed part 412 fixed to and electrically connected to the conductor 32. The fixing portion 411 and the conductor 22 and the fixing portion 412 and the conductor 32 are each fixed by, for example, soldering, brazing, welding, or the like. The fixing part 411 is an example of a first fixing part, and the fixing part 412 is an example of a second fixing part.

Further, the lead terminal 410S has an intermediate portion 413 extending between the fixed portion 411 and the fixed portion 412. The intermediate portion 413 has bent portions 413a1 to 413a5 and extending portions 413b1 to 413b4 extending between adjacent bent portions.

The shape of the intermediate portion 413 will be described below with reference to FIG. 2. FIG. 2 is a diagram seen in the Y direction intersecting a virtual straight line VL passing through the fixed portion 411 and the fixed portion 412. The Y direction is a direction along the surface 30a of the circuit board 30, and is an example of a viewing direction. In the following description, the extending direction of the fixing parts 411, 412 and the extending parts 413b1 to 413b4 indicates the direction toward the fixing part 412.

The bent portion 413a1 is adjacent to the fixed portion 411 and located between the fixed portion 411 and the extended portion 413b1. The lead terminal 410S is bent clockwise at the bent portion 413a1 as it approaches the fixed portion 412. Further, at the bent portion 413a1, the lead terminal 410S is bent at a substantially right angle.

The extending portion 413b1 is located between the bent portion 413a1 and the bent portion 413a2, and extends from the bent portion 413a1 to the bent portion 413a2 in the opposite direction to the X direction.

The bent portion 413a2 is located between the extending portion 413b1 and the extending portion 413b2. The lead terminal 410S is bent counterclockwise at the bent portion 413a2 as it approaches the fixed portion 412. Further, at the bent portion 413a2, the lead terminal 410S is bent at a substantially right angle.

The extending portion 413b2 is located between the bent portion 413a2 and the bent portion 413a3, and extends in the Z direction from the bent portion 413a2 to the bent portion 413a3.

The bent portion 413a3 is located between the extending portion 413b2 and the extending portion 413b3. The lead terminal 410S is bent clockwise at the bent portion 413a3 as it approaches the fixed portion 412. Further, at the bent portion 413a3, the lead terminal 410S is bent at an obtuse angle.

The extending portion 413b3 is located between the bent portion 413a3 and the bent portion 413a4, and extends from the bent portion 413a3 to the bent portion 413a4 in a direction between the Z direction and the opposite direction to the X direction.

The bent portion 413a4 is located between the extending portion 413b3 and the extending portion 413b4. The lead terminal 410S is bent clockwise at the bent portion 413a4 as it approaches the fixed portion 412. Further, at the bent portion 413a4, the lead terminal 410S is bent at an acute angle.

The extending portion 413b4 is located between the bent portion 413a4 and the bent portion 413a5, and extends from the bent portion 413a4 to the bent portion 413a5 in a direction between the opposite direction of the Z direction and the opposite direction of the X direction.

The bent portion 413a5 is located between the extending portion 413b4 and the fixed portion 412. The lead terminal 410S is bent counterclockwise at the bent portion 413a5 as it approaches the fixed portion 412. Further, at the bent portion 413a5, the lead terminal 410S is bent at an obtuse angle.

In this way, in the optical device 1A of this embodiment, when viewed in the Y direction (visual direction), the intermediate portion 413 of the lead terminal 410S bends counterclockwise at the bent portion 413a2 as it approaches the fixed portion 412. , bent clockwise at bent portions 413a3, 413a4 between said bent portion 413a2 and fixed portion 412, and bent counterclockwise at bent portion 413a5 between said bent portions 413a3, 413a4 and fixed portion 412. There is. Note that the bent portion 413a3, the extended portion 413b3, and the bent portion 413a4 can be considered to be bent portions in the clockwise direction. In this case, the bent portion 413a2 is an example of a first bent portion, the bent portions 413a3 and 413a4 are an example of a second bent portion, and the bent portion 413a5 is an example of a third bent portion. Moreover, the counterclockwise direction is an example of a first curving direction, and the clockwise direction is an example of a second curving direction. Note that the viewing direction is one of the directions orthogonal to the virtual straight line. When the viewing direction is opposite to the Y direction, the clockwise direction becomes the first curving direction, and the counterclockwise direction becomes the second curving direction.

According to such a configuration, since the intermediate portion 413 can be configured in a hat shape or a zigzag shape, the length of the intermediate portion 413 can be made longer, and as a result, the intermediate portion 413 (lead terminal 410S) can be made longer. The applied stress can be made smaller.

From another perspective, when viewed in the Y direction (visual direction), the intermediate portion 413 of the lead terminal 410S bends clockwise at the bent portion 413a1 as it approaches the fixed portion 412, and the intermediate portion 413 of the lead terminal 410S bends clockwise at the bent portion 413a1. The bent portion 413a2 between the bent portion 413a2 and the fixed portion 412 is bent counterclockwise, and the bent portions 413a3 and 413a4 between the bent portion 413a2 and the fixed portion 412 are bent clockwise. In this case, the bent portion 413a1 is an example of a first bent portion, the bent portion 413a2 is an example of a second bent portion, and the bent portions 413a3 and 413a4 are an example of a third bent portion. Further, in this case, the clockwise direction is an example of the first bending direction, and the counterclockwise direction is an example of the second bending direction. However, even in this case, if the viewing direction is the opposite direction to the Y direction, the counterclockwise direction becomes the first curving direction, and the clockwise direction becomes the second curving direction.

Further, in this embodiment, the intermediate portion 413 has a bent portion 413a4 that is spaced apart from the fixing portion 411 (first fixing portion) and the fixing portion 412 (second fixing portion) in the Z direction (first direction). . Note that the expression "separated in the Z direction" also includes a state in which they are slightly shifted in the Z direction.

With such a configuration, the intermediate portion 413 can be formed into a hat shape or a zigzag shape, so that the length of the intermediate portion 413 can be made longer, which in turn can act on the intermediate portion 413 (lead terminal 410S). It is possible to further reduce the stress caused by

Further, in the present embodiment, the bent portion 413a2 bends toward the Z direction (first direction) as it approaches the fixed portion 412 (second fixed portion), and the bent portion 413a4 bends toward the fixed portion 411 (first fixed portion). ) as it approaches, it curves toward the Z direction. The bent portion 413a2 is an example of a fourth bent portion. The bent portion 413a4 is an example of a fifth bent portion.

With such a configuration, the intermediate portion 413 can be formed into a hat shape or a zigzag shape, so that the length of the intermediate portion 413 can be made longer, which in turn can act on the intermediate portion 413 (lead terminal 410S). It is possible to further reduce the stress caused by

Note that, like the lead terminal 410S, the lead terminal 410L has an intermediate portion 413 extending between the fixed portion 411 and the fixed portion 412, and the intermediate portion 413 has a bent portion similar to the bent portions 413a1 to 413a5, It has extending parts similar to the extending parts 413b1 to 413b4. However, the length of the extending portion 413b2 is longer than the lead terminal 410S. Even with such a lead terminal 410L, the same effect as the lead terminal 410S can be obtained.

Further, in the present embodiment, the optical device 1A includes two stages of lead terminals 410S and 410L, which have different shapes and positions of the fixing portions 411 in the Z direction, as the lead terminals 40A, but the present invention is not limited to this. The lead terminals 40A may have one stage, or may have three or more stages. Furthermore, the fixing portion 411 of the lead terminal 40A may be located on the opposite side of the surface 30b of the circuit board 30 with respect to the surface 30a.

Further, in this embodiment, as shown in FIG. 1, a gap G2 is provided between the optical module 20 and the edge 30c of the circuit board 30, and the lead terminals 40A (410S, 410L) are partially connected to the edge 30c of the circuit board 30. It is located within the gap G2.

According to such a configuration, by partially positioning the lead terminal 40A within the gap G2, the length of the lead terminal 40A can be made longer than when the lead terminal 40A is not positioned within the gap G2. As a result, the stress acting on the lead terminal 40A can be further reduced.

FIG. 3 is a side view of the optical device 1A viewed in the direction D3 in FIG. As shown in FIG. 3, in the optical module 20, the positions of the conductor 22 and the plurality of fixing parts 411 fixed to the conductor 22 change reciprocally in the Z direction as the conductor 22 moves in the Y direction. That is, the conductors 22 and the fixing parts 411 are arranged in a staggered manner. According to such a configuration, for example, even if the width of the conductor 22 in the Y direction is wide, the effect that the pitch in the Y direction between the lead terminals 40A can be made narrower can be obtained.

[Second embodiment]
FIG. 4 is a side view of a part of the optical device 1B of this embodiment, and FIG. 5 is an enlarged view of a part of FIG. 4. As will become clear from a comparison between FIG. 4 and FIG. 2, the bent shape of the lead terminal 40B of this embodiment is different from the bent shape of the lead terminal 40A of the first embodiment. The optical device 1B also includes a plurality of lead terminals 410B1 fixed to the conductor 321 (32) on the surface 30a of the circuit board 30, and a plurality of lead terminals 40B2 fixed to the conductor 322 (32) on the surface 30b. have. In the present embodiment, as an example, these lead terminals 40B have the same shape and are arranged in plane symmetry with respect to a virtual plane VP passing through the center of the circuit board 30 in the Z direction (thickness direction), for example. The conductor 321 is an example of a third conductor, and the conductor 322 is an example of a fourth conductor. Further, the lead terminal 40B1 is an example of a first lead terminal, and the lead terminal 40B2 is an example of a second lead terminal.

As shown in FIG. 5, the lead terminal 410B1 (40B), like the lead terminal 40A, has an intermediate portion 413 extending between the fixed portion 411 and the fixed portion 412, and the intermediate portion 413 has a bent portion 413a1 to a bent portion 413a1. It has a bent portion similar to 413a5 and an extending portion similar to extending portions 413b1 to 413b4. However, the bending angles of the bent portions 413a3 to 413a5 and the extending direction and length of the extending portions 413b3 and 413b4 are different between the lead terminal 40A and the lead terminal 40B.

However, even with such a lead terminal 40B, the intermediate portion 413 can be configured in a hat shape or a zigzag shape, so the length of the intermediate portion 413 can be made longer, and as a result, the intermediate portion 413 (lead terminal 40B) can be further reduced.

Further, in the present embodiment, the optical device 1B includes a plurality of lead terminals 410B1 (first lead terminals) electrically connected to the conductor 321 (third conductor) on the surface 30a (first surface), and a plurality of lead terminals 410B1 (first lead terminals) on the surface 30b (first surface). A plurality of lead terminals 410B2 (second lead terminals) are electrically connected to the conductor 322 (fourth conductor) on the second surface).

According to such a configuration, for example, compared to a case where the plurality of lead terminals 40B are provided only on one surface 30a of the circuit board 30, the Y direction (surface 30a) can be made shorter, resulting in the advantage that the optical device 1B can be configured more compactly in the Y direction.

FIG. 6 is a side view of the optical device 1B viewed in the direction D5 in FIG. 4. As shown in FIG. 6, in the optical module 20, the conductors 22 are arranged in two stages in the Z direction. That is, in the present embodiment, the optical module 20 includes, as the conductor 22 (first conductor), a conductor 22B1 electrically connected to the lead terminal 410B1 (first lead terminal), and a lead terminal 410B2 (second lead terminal). and a conductor 22B2 electrically connected to the conductor 22B2, and the conductor 22B1 and the conductor 22B2 are shifted in the Z direction (first direction). The conductor 22B1 is an example of a fifth conductor, and the conductor 22B2 is an example of a sixth conductor.

According to such a configuration, for example, the length of the range in which the plurality of conductors 22 are arranged in the Y direction (direction along the surface 30a) is shorter than when the plurality of conductors 22 are arranged in a straight line in the Y direction. This provides the advantage that the optical device 1B can be made more compact in the Y direction.

Note that the lead terminal 410B2 is a lead terminal having the same configuration (specification) as the lead terminal 410B1 and is attached upside down, and it goes without saying that the same effect as the lead terminal 410B1 can be obtained.

[First modification]
FIG. 7 is a side view at the same position as FIG. 6 showing the optical module 20 and the conductor 22 and lead terminal 40B1 of the circuit board 30 of the optical device 1B1 of the first modification of the second embodiment.

As shown in FIG. 7, in this modification, the conductor 321 (third conductor) and the conductor 322 (fourth conductor) are not aligned in the Z direction but are shifted in the Y direction, and the lead terminal 410B1 (first lead terminal) Lead terminal 410B2 (second lead terminal) is not aligned in the Z direction but shifted in the Y direction, and conductor 22B1 (fifth conductor) and conductor 22B2 (sixth conductor) are not aligned in the Z direction but shifted in the Y direction. . Such a configuration also provides the same effects as the second embodiment.

[Third embodiment]
FIG. 8 is a side view of the optical device 1C of this embodiment. The lead terminal 40C of this embodiment has the same configuration as the lead terminal 40A of the first embodiment. That is, in this embodiment as well, the lead terminal 40C has an intermediate portion 413 extending between the fixed portion 411 and the fixed portion 412, like the lead terminal 40A, and the intermediate portion 413 has bent portions 413a1 to 413a5. It has a similar bent portion and an extending portion similar to the extending portions 413b1 to 413b4.

However, as will become clear from a comparison between FIG. 8 and FIG. 2, the orientation of the circuit board 30 of this embodiment is different from the orientation of the circuit board 30 of the first embodiment. Further, in this embodiment, the conductor 32C electrically connected to the fixing portion 411 of the lead terminal 40C is a through conductor that penetrates the circuit board 30 in the thickness direction.

The circuit board 30 extends across and perpendicularly to the X direction. Further, the conductor 32C is, for example, a through hole. In this case, the fixed part 412 of the lead terminal 40C is inserted into the through hole 30d provided in the circuit board 30, and in the inserted state, the through hole 30d is filled with the conductor 32C having fluidity, and then the conductor 32C is The fixing portion 412, the conductor 32C, and the conductor (not shown) of the circuit board 30 exposed in the through hole 30d are thereby electrically and mechanically connected. The lead terminal 40C of this embodiment is a plug pin for the circuit board 30.

Even in such a configuration, since the structure of the intermediate portion 413 is the same as that in the first embodiment, the same effects as in the first embodiment can be obtained also in this embodiment.

[Fourth embodiment]
FIG. 9 is a plan view of the optical device 1D of this embodiment. The lead terminal 40D of this embodiment has the same configuration as the lead terminal 40B of the second embodiment. That is, in this embodiment as well, the lead terminal 40D has an intermediate portion 413 extending between the fixing portion 411 and the fixing portion 412, similarly to the lead terminal 40B.

However, FIG. 9 is a diagram of the optical device 1D viewed in the opposite direction to the Z direction. That is, in the second embodiment, the viewing direction is the Y direction, whereas in this embodiment, the viewing direction is the opposite direction to the Z direction. That is, in the second embodiment, the lead terminal 40B is bent approximately along an imaginary plane that intersects with the Y direction, whereas in this embodiment, the lead terminal 40D is bent approximately along an imaginary plane that intersects with the Z direction. curved along.

Even in such a configuration, the structure of the intermediate portion 413 is the same as that in the second embodiment, so that the same effects as in the second embodiment can also be obtained in this embodiment.

[Fifth embodiment]
FIG. 10 is a side view of the optical device 1E of this embodiment. As will become clear from a comparison between FIG. 10 and FIG. 2, the lead terminal 40E of this embodiment has an extended portion 413b1 between the bent portion 413a1 and the bent portion 413a4 of the lead terminal 40A of the first embodiment. , a bent portion 413a2, an extended portion 413b2, a bent portion 413a3, and an extended portion 413b5 in place of the extended portion 413b3.

The bent portion 413a1 is adjacent to the fixed portion 411 and located between the fixed portion 411 and the extended portion 413b5. The lead terminal 40E is bent clockwise at the bent portion 413a1 as it approaches the fixed portion 412. Further, at the bent portion 413a1, the lead terminal 40E is bent at an obtuse angle.

The extending portion 413b5 is located between the bent portion 413a1 and the bent portion 413a4, and extends from the bent portion 413a1 to the bent portion 413a4 in a direction between the Z direction and the opposite direction to the X direction.

The bent portion 413a4 is located between the extending portion 413b5 and the extending portion 413b4. The lead terminal 40E is bent clockwise at the bent portion 413a4 as it approaches the fixed portion 412. Further, at the bent portion 413a4, the lead terminal 40E is bent at an acute angle.

However, also in this embodiment, the intermediate portion 413 has a bent portion 413a4 that is separated from the fixed portion 411 (first fixed portion) and the fixed portion 412 (second fixed portion) in the Z direction (first direction). .

Therefore, according to this embodiment as well, the intermediate portion 413 can be formed into a hat shape or a zigzag shape, so that the length of the intermediate portion 413 can be made longer, and as a result, the intermediate portion 413 (lead terminal 40E) can be configured to have a hat shape or a zigzag shape. The applied stress can be made smaller.

Although the embodiments and modified examples of the present invention have been illustrated above, the embodiments and modified examples described above are merely examples, and are not intended to limit the scope of the invention. The embodiments and modifications described above can be implemented in various other forms, and various omissions, substitutions, combinations, and changes can be made without departing from the gist of the invention. In addition, specifications such as each configuration, shape, etc. (structure, type, direction, model, size, length, width, thickness, height, number, arrangement, position, material, etc.) may be changed as appropriate. It can be implemented by

For example, the orientation of the substrate, the relative position between the substrate and the optical module, the position and shape of the fixing part, the method of joining the lead terminal and the fixing part, etc. can be modified in various ways.

1A, 1B, 1B1, 1C, 1D, 1E...Optical device 10...Base 20...Optical module 20a...Side surface 21...Body 22...Conductor (first conductor)
22B1...Conductor (fifth conductor)
22B2...Conductor (sixth conductor)
30...Circuit board (board)
30a... side (first side)
30b... side (second side)
30c...Edge 30d...Through hole 31...Components 32, 32C...Conductor (second conductor)
321...Conductor (third conductor)
322...Conductor (fourth conductor)
40A, 40B, 40B1, 40B2, 40C, 40D, 40E...Lead terminal 410B1...Lead terminal (first lead terminal)
410B2...Lead terminal (second lead terminal)
410L...Lead terminal 410S...Lead terminal 411...Fixing part (first fixing part)
412... Fixed part (second fixed part)
413...Intermediate part 413a1...Bending part 413a2...Bending part (first bending part, fourth bending part)
413a3...Bending part (second bending part)
413a4...Bending part (second bending part, fifth bending part)
413a5...Bending part (third bending part)
413b1 to 413b5...Extending portion D3...Direction D5...Direction G1...Gap G2...Gap X...Direction Y...Direction Z...Direction (first direction)

Claims (5)

an optical module having a first conductor;
A substrate having a first surface facing in a first direction and a second conductor provided on the first surface ;
a lead terminal electrically connecting the first conductor and the second conductor;
Equipped with
The lead terminal is
a first fixing part fixed to the first conductor;
a second fixing part fixed to the second conductor in a state extending in a direction crossing the first direction ;
an intermediate part extending between the first fixing part and the second fixing part;
has
The intermediate portion is
located between the first fixing part and the second fixing part, and approaching the second fixing part when viewed in a viewing direction intersecting an imaginary straight line passing through the first fixing part and the second fixing part; a first bent portion that bends in a first curved direction that is one of clockwise and counterclockwise as
a second curved direction that is located between the first bending part and the second fixing part and is the other of the clockwise direction and the counterclockwise direction as the second fixing part approaches the second fixing part when viewed in the viewing direction; a second bent part that bends to
a third bent part that is located between the second bent part and the second fixed part and bends in the first curved direction as it approaches the second fixed part when viewed in the viewing direction;
has
A gap is provided between the optical module and the substrate,
The lead terminal has a portion located within the gap and an inverted U-shape or an inverted V-shape that is located away from the first surface in the first direction outside the gap and is convex in the first direction. An optical device having a portion bent in a shape . The substrate is
A first side facing the first direction ,
a second surface facing in the opposite direction to the first direction;
a plurality of third conductors as the second conductors provided on the first surface;
a plurality of fourth conductors as the second conductors provided on the second surface;
has
As the lead terminal,
a plurality of first lead terminals each electrically connected to the third conductor;
a plurality of second lead terminals each electrically connected to the fourth conductor;
The optical device according to claim 1, comprising: The optical module includes:
a plurality of fifth conductors as the first conductors, each electrically connected to the first lead terminal;
a plurality of sixth conductors as the first conductors, each electrically connected to the second lead terminal;
has
The optical device according to claim 2, comprising the fifth conductor and the sixth conductor shifted in the first direction. an optical module having a first conductor;
A substrate having a first surface facing in a first direction and a second conductor provided on the first surface;
a lead terminal electrically connecting the first conductor and the second conductor;
Equipped with
The lead terminal is
a first fixing part fixed to the first conductor;
a second fixing part fixed to the second conductor in a state extending in a direction crossing the first direction ;
an intermediate part extending between the first fixing part and the second fixing part;
has
The intermediate portion has a bent portion spaced apart from the first fixing portion and the second fixing portion in the first direction ,
A gap is provided between the optical module and the substrate,
The lead terminal has a portion located within the gap and an inverted U-shape or an inverted V-shape that is located away from the first surface in the first direction outside the gap and is convex in the first direction. An optical device having a portion bent in a shape . body and
a lead terminal that is fixed to the body and electrically connected to the second conductor of a substrate having a first surface facing the first direction and a second conductor provided on the first surface; and,
An optical module comprising :
The lead terminal is
a first fixing part fixed to the body;
a second fixing part fixed to the second conductor in a state extending in a direction crossing the first direction ;
an intermediate part extending between the first fixing part and the second fixing part;
has
The intermediate portion is
located between the first fixing part and the second fixing part, and approaching the second fixing part when viewed in a viewing direction intersecting an imaginary straight line passing through the first fixing part and the second fixing part; a first bent portion that bends in a first curved direction that is one of clockwise and counterclockwise as
a second curved direction that is located between the first bending part and the second fixing part and is the other of the clockwise direction and the counterclockwise direction as the second fixing part approaches the second fixing part when viewed in the viewing direction; a second bent part that bends to
a third bent part that is located between the second bent part and the second fixed part and bends in the first curved direction as it approaches the second fixed part when viewed in the viewing direction;
has
A gap is provided between the optical module and the substrate,
The lead terminal has a portion located within the gap and an inverted U-shape or an inverted V-shape that is located away from the first surface in the first direction outside the gap and is convex in the first direction. An optical module having a portion bent in a shape .

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