JP2013029539A - Optical module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical module that has such a structure that a housing is easy to assemble, and is free of falling and playing of the housing.SOLUTION: There is provided an optical module 1 which includes a lower housing 5, and an upper housing 4 assembled to the lower housing 5 to cover the lower housing 5. The lower housing 5 is provided with a bottom wall 53 and two side walls, a beam part 55 is provided between the side walls on the front side of the lower housing 5, and a cut part 51 is made in a lower surface of the beam part 55; and projection parts are provided on the rear sides of the side walls, and upper sides of the projection parts are rounded. The upper housing 4 is provided with first and second sides 44, claws 41 are provided on a front side of the upper housing 4, and recessed parts are made in rear-side ends of the first and second sides. The housings are configured to be easily assembled by making upper-side end faces 54a of the side walls of the lower housing 5 against the upper housing 4 and the cut parts 51 against the claw parts 41 respectively, and then fitting the projection parts in the recessed parts, and the housings neither fall nor play.

Description

  The present invention relates to an optical module having an optical element such as a light emitting element and a light receiving element and attached to an optical communication device (host device).

  Patent Document 1 discloses a rotatable upper housing for an optoelectronic device. The upper housing has a claw having a concave curved surface at one end thereof. The lower housing has a convex curved surface that matches the concave curved surface of the upper housing claw. The upper housing rotates between the open position and the closed position along the convex curved surface of the lower housing. The upper casing further has means for fixing the upper casing to the lower casing. As means for fixing, for example, there are a protrusion along the side of the casing, a hole for receiving a protrusion provided in the lower casing, and the like.

US Patent Application Publication No. 2008/0203864

  However, in Patent Document 1, the method of fixing the upper housing and the lower housing is only shown in an ambiguous manner, and in particular, the method for preventing the upper housing from being detached from the lower housing is not clear. As a method of fixing by combining the die-cast housings, conventionally, there are methods of screwing or using another part (for example, a thin sheet metal press part). However, such a method requires parts cost and man-hours. In addition, such a method has quality control restrictions such as inspection during assembly.

  Accordingly, the present invention has been made to solve such problems, and has a structure that allows easy assembly of the casing, and the assembled casing is detached or rattled. An object of the present invention is to provide an optical module without any problems.

  In order to solve the above-described problems, an optical module according to the present invention includes an optical element, a lower casing that houses the optical element, and a plate-shaped upper casing that covers the lower casing, and the upper casing is the lower casing. An optical module assembled in a body, wherein the lower housing includes a single bottom wall, a first side wall and a second side wall that rise from the bottom wall and face each other, and a second side wall from the first side wall. The beam portion is arranged on one end side in the direction of the reference axis extending along the bottom wall, the first side wall, and the second side wall in the lower housing. A notch is formed on the surface of the beam that faces the bottom wall, the first side wall has a first protrusion, and the first protrusion has a reference axis. The second side wall has a second protrusion, and the second protrusion is provided on the other end of the reference shaft. The first protrusion protrudes toward the first side wall, the surface of the first protrusion has a first surface area having a curved surface shape, and the surface of the second protrusion has a second surface having a curved surface shape. And the first surface area is provided on the opposite side of the bottom wall in the first protrusion, and the second surface area is on the opposite side of the bottom wall in the second protrusion. The upper housing has a claw portion and a first side and a second side extending in the reference axis direction. The claw portion is provided at an end portion on one end side of the upper housing. , Protruding from the main body of the upper housing to one end side along the reference axis, and the end portion on the other end side of the first side has a first recess recessed on the second side side The second end of the second side has a second recess recessed toward the first side, the first side being located on the first side wall, and the second side Is located on the second side wall and the first side wall has along the bottom wall The end surface that contacts the upper housing, the end surface that the second side wall has and extends along the bottom wall contacts the upper housing, the notch contacts the claw, and the first protrusion It fits into the 1st crevice, and the 2nd projection part is fitted in the 2nd crevice, It is characterized by the above-mentioned.

  According to this, since the shape of the region on the opposite side of the bottom wall of the surface of the protrusion is a curved shape, when the upper housing is pushed into the lower housing when the upper housing is assembled to the lower housing, The distance between the two protrusions is increased and then the protrusion enters the recess at the same time as the distance between the protrusions is restored. For this reason, in order to assemble the upper casing to the lower casing, it is not particularly necessary to screw or use separate parts, and the assembly of the casing becomes easy. Further, in a state where the upper casing is assembled to the lower casing, the end surfaces extending along the bottom walls of the first and second side walls of the lower casing are in contact with the upper casing, and the notches are claw portions. Since the projecting portion comes into contact with the concave portion, the assembled housing does not come off or rattle.

  The upper housing is connected to the first recess and extends to the bottom wall, and the second wall is connected to the second recess and extends to the bottom wall. The first wall portion is inclined toward the second side as it goes from the first recess to the bottom wall, and the second wall portion extends from the second recess to the bottom wall. It is preferable to incline toward the first side as it goes. According to this, the 1st wall part connected to the 1st crevice inclines to the 2nd edge side as it goes to the bottom wall, and the 2nd wall part connected to the 2nd crevice is in the bottom wall Since it inclines to the 1st edge side as it goes, when pushing an upper case into a lower case at the time of an assembly, the interval of the 1st projection part and the 2nd projection part of a lower case is set to the 1st side. The second wall portion can be spread more smoothly by the inclination of the second wall portion. Therefore, the process of assembling the upper housing to the lower housing is further facilitated.

  According to the present invention, it is possible to obtain an optical module having a structure in which a housing can be easily assembled and in which the assembled housing does not come off or rattle.

It is a figure which shows the optical module which concerns on this embodiment. It is an upper perspective view which decomposes | disassembles and shows the optical module of FIG. FIG. 2 is an exploded perspective view illustrating the optical module of FIG. 1 in an exploded manner. It is a figure which shows the side surface of the optical module of FIG. It is a figure which shows the assembly process of the optical module of FIG. It is a figure which shows the assembly process of the optical module of FIG. It is a figure which shows the assembly process of the optical module of FIG. It is sectional drawing which cut | disconnects and shows the optical module of FIG. 1 to a longitudinal direction. It is a perspective view which expands and shows the rear part of the optical module of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a diagram illustrating an optical module according to the present embodiment. FIG. 2 is an exploded top perspective view showing the optical module shown in FIG. 3 is an exploded perspective view of the optical module shown in FIG. The optical module 1 is a module that is attached to a host device (not shown) and used for optical communication. As shown in FIG. 1, the optical module 1 includes a main body 2 and a shield member 3.

  As shown in FIGS. 2 and 3, the main body 2 includes an upper casing 4, a lower casing 5, a light receiving element 6 (optical element), a light emitting element 7 (optical element), and a circuit board 8. The substrate holder 9, the heat dissipation sheet 11, the front shield member 12, the actuator 13, and the bail 14 are provided. In the following description, the top, bottom, front, back, left and right of the optical module 1 are the upper housing 4 side up, the lower housing 5 side down, and the side where the light receiving element 6 and the light emitting element 7 are arranged in front. It shall mean the direction of time.

  The upper housing 4 and the lower housing 5 are long in the front-rear direction, and hold the light receiving element 6, the light emitting element 7, the circuit board 8, the board holder 9, and the heat dissipation sheet 11 therein. It is a housing. The material of the upper housing 4 and the lower housing 5 is a metal such as zinc, for example. The upper housing 4 is a plate-shaped housing and functions as a lid that is assembled to the lower housing 5 and covers the upper portion of the lower housing 5. The lower housing 5 is a housing that houses the light receiving element 6 and the light emitting element 7 and functions as a bottom wall and a side wall. The upper housing 4 and the lower housing 5 also function as members for shielding electromagnetic noise generated inside the main body 2 from leaking outside the main body 2. Here, when rattling occurs when the upper housing 4 and the lower housing 5 are assembled, a gap is formed between the upper housing 4 and the lower housing 5. Electromagnetic noise leaks from the gap between the upper housing 4 and the lower housing 5. If electromagnetic noise leaks, it will lead to characteristic deterioration of the optical module 1. Therefore, it is necessary to assemble the upper housing 4 and the lower housing 5 so as not to cause rattling.

  The light receiving element 6 is an element for converting an optical signal received from the outside of the optical module 1 through an optical fiber into an electric signal. The light receiving element 6 and the circuit board 8 are connected to each other by a connector having a predetermined shape. The electrical signal converted by the light receiving element 6 is transmitted to the circuit board 8 through the connector.

  The light emitting element 7 is an element that converts an electrical signal received from the circuit board 8 into an optical signal and transmits the converted optical signal to the outside of the optical module 1 through an optical fiber. The light emitting element 7 is driven with a relatively large current in order to transmit an optical signal to a distant place. For this reason, the light emitting element 7 generates large heat during operation. The light emitting element 7 and the circuit board 8 are connected to each other by a connector having a predetermined shape. An electrical signal from the circuit board 8 is transmitted to the light emitting element 7 through the connector. The light receiving element 6 and the light emitting element 7 are accommodated side by side in the left-right direction on the front side (one end side (reference numeral E1 side in the figure)) of the lower housing 5.

  In the present embodiment, the circuit board 8 is composed of two printed boards, an upper board 8A and a lower board 8B. A plurality of circuit components are mounted on the upper substrate 8A and the lower substrate 8B. In the upper substrate 8A and the lower substrate 8B, a predetermined process is performed on the signal received from the light receiving element 6, and the processed signal is transmitted to the outside of the optical module 1 as an electric signal. Further, in the upper substrate 8A and the lower substrate 8B, a predetermined process is performed on the electrical signal transmitted from the outside of the optical module 1, and the processed signal is transmitted to the light emitting element 7. The upper substrate 8A and the lower substrate 8B are electrically connected to each other by a flexible cable.

  The substrate holder 9 is a member for fixing the upper substrate 8A and the lower substrate 8B to each other. The substrate holder 9 is disposed between the upper substrate 8A and the lower substrate 8B. It is also possible to combine circuit components mounted on the upper substrate 8A and the lower substrate 8B on a single printed board. In this case, the substrate holder 9 is not necessary.

  The heat dissipation sheet 11 is a sheet for releasing heat generated by the light receiving element 6, the light emitting element 7, and the circuit board 8 to the upper casing 4 and the lower casing 5. The heat dissipating sheet 11 is appropriately provided at a location in contact with a component that generates a large amount of heat, such as the upper and lower surfaces of the light emitting element 7 and the lower surface of the lower substrate 8B.

  Here, the heat radiation sheet 11 will be described in more detail with reference to FIG. FIG. 4 is a diagram illustrating a partially cutaway side surface of the optical module 1. In order to efficiently release heat to the upper casing 4 and the lower casing 5, the heat radiation sheet 11 needs to be in close contact with both the casing (the upper casing 4 and the lower casing 5) and the component (the light emitting element 7). There is. On the other hand, the interval between the housing and the parts varies from individual to individual due to manufacturing tolerances. Specifically, the design dimension of the interval between the housing and the component is about 1.0 mm, but due to manufacturing tolerances, the difference of about 0.4 mm between the individual with the largest interval and the individual with the smallest interval. Occurs. In order to cope with this manufacturing tolerance, the heat radiating sheet 11 has a sufficient thickness so that the casing and the components can be brought into close contact with each other even when the distance between the casing and the components is maximized. On the other hand, the heat radiating sheet 11 can be sufficiently compressed so as to be within the interval even in an individual where the interval between the housing and the component is minimized. That is, the heat dissipation sheet 11 absorbs the manufacturing tolerance of the interval between the housing and the component due to its elasticity. Therefore, as the material of the heat dissipation sheet 11, for example, an elastic body such as silicone rubber is used. The heat dissipation sheet 11 generates a repulsive force by being compressed between the housing and the component. This repulsive force acts as a force that pushes the upper housing 4 upward.

  Returning to FIG. 2 and FIG. 3, the description will be continued. The front shield member 12 is a member for preventing electromagnetic noise generated inside the main body 2 from being radiated to the outside. The actuator 13 and the bail 14 are members used when the optical module 1 is engaged with and detached from a cage (not shown). The actuator 13 and the bail 14 are attached to the front end of the lower housing 5. The actuator 13 has an engagement protrusion used for engagement with the cage on the rear end side. When the optical module 1 is inserted into the cage, the engaging projection is locked in the concave portion of the cage. The bail 14 is provided so as to be rotatable about the left-right direction. When removing the optical module 1 from the cage, the bail 14 is rotated to move the engagement protrusion provided on the actuator 13 to release the locked state. When the locked state is released, the optical module 1 can be removed from the cage.

  Next, the above-described upper housing 4 will be described in more detail. FIG. 5A shows the upper housing 4 and the lower housing 5. The upper housing 4 includes a claw portion 41, and a first side 44-1 and a second side 44-2 that extend in the direction of the reference axis AX1. The reference axis AX1 extends along the bottom wall 53, the first side wall 54-1 and the second side wall 54-2.

  The claw portion 41 is provided at an end portion on one end side of the upper housing 4 in the direction of the reference axis AX1. Here, the one end side in the direction of the reference axis AX1 refers to the front side (reference numeral E1 side in the drawing). The claw portion 41 protrudes from the main body of the upper housing 4 to one end side along the reference axis AX1. In the present embodiment, the number of the claw portions 41 is two. However, at least one claw portion 41 is sufficient. The shape of the nail | claw part 41 is formed so that it may go up a little as it goes to a front end. In addition, the claw portion 41 is made thinner than the other portions in the middle part of the claw portion 41 from the upper housing 4 to the front side until reaching the tip.

  The first concave portion 42-1 is formed at the other end side (reference numeral E2 side in the drawing) of the first side 44-1 in the direction of the reference axis AX1, that is, the rear end portion. The second concave portion 42-2 is formed at the other end side of the second side 44-2 in the direction of the reference axis AX1, that is, at the rear end portion. The size of the first recess 42-1 is large enough to accommodate the first protrusion 52-1. The size of the second recess 42-2 is large enough to accommodate the second protrusion 52-2.

  The rear side of the upper housing 4 will be described in more detail (see also FIG. 9). The upper housing 4 has a first wall portion 43-1 and a second wall portion 43-2. The first wall 43-1 is connected to the first recess 42-1, and extends to the bottom wall 53 side. The first wall portion 43-1 is inclined toward the second side 44-2 as it goes from the first concave portion 42-1 to the bottom wall 53. The second wall portion 43-2 is connected to the second recess 42-2 and extends toward the bottom wall 53 side. The second wall 43-2 is inclined toward the first side 44-1 as it goes from the second recess 42-2 to the bottom wall 53.

  The first side 44-1 and the second side 44-2 are provided in the upper housing 4 as sides that extend in the direction of the reference axis AX1. The other end side of the first side 44-1, that is, the rear end portion has a first recess 42-1, and the other end side end portion of the second side 44-1 is the second end portion. The concave portion 42-2. The first side 44-1 is located on the first side wall 54-1, and the second side 44-2 is located on the second side wall 54-2.

  The overhanging portion 45 is a portion that protrudes toward the lower housing 5 from the surface on the side facing the lower housing 5 at the rear end of the upper housing 4. When the overhanging portion 45 is sandwiched between the first side wall 54-1 and the second side wall 54-2 of the lower casing 5, the upper casing 4 can move in the left-right direction with respect to the lower casing 5. Limited.

  Next, the above-described lower housing 5 will be described in more detail. The lower housing 5 includes a single bottom wall 53, a first side wall 54-1 and a second side wall 54-2 that rise from the bottom wall 53 and face each other, and a first side wall 54-1 to a second side wall. And a beam portion 55 that spans the side wall 54-2. The beam portion 55 is disposed on one end side in the direction of the reference axis AX1 in the lower housing 5. A notch 51 is formed on the surface of the beam portion 55 that faces the bottom wall 53, that is, the lower surface of the beam portion 55. The width of the notch 51 is set to be substantially equal to the width of the claw 41 and the claw 41 can be fitted into the notch 51. Further, the notch 51 abuts on the claw 41.

  The first side wall 54-1 has a first protrusion 52-1. The first protrusion 52-1 is provided on the other end side of the reference axis AX1, and protrudes toward the second side wall 54-2. Further, as shown in FIG. 9, the surface of the first protrusion 52-1 has a first surface region 52 a-1 having a curved surface shape. The first surface region 52a-1 is provided on the opposite side to the bottom wall 53, that is, on the upper side in the first protrusion 52-1. The first protrusion 52-1 is fitted into the first recess 42-1.

  The second side wall 54-2 has a second protrusion 52-2. The second protrusion 52-2 is provided on the other end side of the reference axis AX1, and protrudes toward the first side wall 54-1. Moreover, as shown in FIG. 9, the surface of the 2nd projection part 52-2 has 2nd surface area | region 52a-2 which comprises curved surface shape. The second surface region 52a-2 is provided on the opposite side to the bottom wall 53, that is, on the upper side, in the second protrusion 52-2. The second protrusion 52-2 is fitted into the second recess 42-2.

  An end surface 54 a extending along the bottom wall 53 of the first side wall 54-1 and the second side wall 54-2 of the lower housing 5 is in contact with the upper housing 4.

  Next, how to assemble the optical module 1 will be described. 5, 6, and 7 are diagrams illustrating an assembly process of the optical module 1. First, as shown in part (a) of FIG. 5, the light receiving element 6, the light emitting element 7, the circuit board 8, the substrate holder 9 and the heat dissipation sheet 11 are accommodated in the lower casing 5, and the actuator is disposed in the lower casing 5. 13 and bale 14 are assembled. Next, the nail | claw part 41 is inserted in the notch part 51 like the (b) part of FIG. Next, the upper housing 4 is rotated in the direction of the arrow D1 around the side where the claw portion 41 and the cutout portion 51 abut, and the upper housing 4 is brought closer to the lower housing 5 side.

  6A, the upper housing 4 is moved closer to the lower housing 5, and the first wall 43-1 at the rear end of the upper housing 4 is changed to the first protrusion 52-1. The state immediately before the 2nd wall part 43-2 contact | connects the 2nd projection part 52-2 is shown. From this state, the upper housing 4 is further brought closer to the lower housing 5, the first wall portion 43-1 is the first protrusion portion 52-1, and the second wall portion 43-2 is the second protrusion portion. After coming into contact with 52-2, the upper housing 4 is pushed in the direction of the arrow D2 and pushed into the lower housing 5 side. Then, the first surface region 52a-1 above the first protrusion 52-1, and the second surface region 52a-2 above the second protrusion 52-2 have a curved shape. In addition, the first wall 43-1 is inclined toward the second side 44-2 as it goes to the bottom wall, and the first side as the second wall 43-2 goes to the bottom wall. Since it is inclined toward the side 44-1, the first wall portion 43-1 is located on the rear end portion of the lower housing 5 to the left of the first protruding portion 52-1, and the second wall portion 43. -2 pushes the second protrusion 52-2 to the right, so that the lower housing 5 tries to increase the distance between the first protrusion 52-1 and the second protrusion 52-2. Force F1 to work.

  FIG. 6B shows a state after the upper housing 4 has been pushed into the lower housing 5. When the upper housing 4 has been pushed into the lower housing 5, the restoring force F <b> 2 acts on the rear end portion of the lower housing 5 due to the elasticity of the lower housing 5, and the first projecting portion 52-1 and the second housing 5. The distance from the protrusion 52-2 is almost restored. At this time, the 1st projection part 52-1 is accommodated in the 1st recessed part 42-1, and the 2nd projection part 52-2 is accommodated in the 2nd recessed part 42-2. Up to this point, the assembly of the upper housing 4 and the lower housing 5 is completed. In this state, the first end surface 54a-1 that the first side wall 54-1 has and extends along the bottom wall 53 abuts on the upper housing 4, and the second side wall 54-2 has the bottom wall. A second end surface 54 a-2 extending along the line 53 abuts on the upper housing 4. Further, the notch 51 abuts on the claw 41, the first protrusion 52-1 is fitted into the first recess 42-1, and the second protrusion 52-2 is the second recess 42-2. Fitted.

  Next, the shield member 3 is fitted to the main body 2 from the rear of the main body 2 as shown in FIG. The shield member 3 and the main body 2 are positioned at predetermined positions by holes provided in the shield member 3 and protrusions provided on the main body 2. In this way, the optical module 1 is completed as shown in FIG.

  Then, the effect of the optical module 1 is demonstrated. The optical module 1 is assembled by housing the light receiving element 6, the light emitting element 7, the circuit board 8, the board holder 9 and the heat dissipation sheet 11 in the lower casing 5, and assembling the actuator 13 and the bail 14 in the lower casing 5. The claw portion 41 is inserted into the cutout portion 51, the upper housing 4 is rotated about the side where the claw portion 41 and the cutout portion 51 abut, and the upper housing 4 is moved closer to the lower housing 5 side. This is done by pushing the housing 4 into the lower housing 5 from above. Therefore, in order to assemble the upper casing 4 to the lower casing 5, it is not particularly necessary to use screws or use separate parts, and the casing can be easily assembled. Furthermore, the 1st wall part 43-1 inclines to the 2nd edge | side 44-2 side as it goes to a bottom wall, and the 2nd wall part 43-2 is a 1st edge | side as it goes to a bottom wall. It inclines to 44-1 side. Therefore, when the upper casing 4 is pushed into the lower casing 5 during assembly, the first protrusion 52-1 of the lower casing 5 hits the first wall 43-1 and the second protrusion 52-2. Since the space between the first protrusion 52-1 and the second protrusion 52-2 of the lower housing 5 can be increased more smoothly by hitting the second wall 43-2, the upper housing The process of assembling 4 to the lower housing 5 is further facilitated.

  FIG. 8A is a cross-sectional view taken along the line II of FIG. 5B, and shows a state in which the claw portion 41 is inserted into the cutout portion 51. FIG. . FIG. 8B is a cross-sectional view taken along line II-II of FIG. 6A, with the side where the claw portion 41 and the cutout portion 51 abut on the axis. It is a figure which shows the state which rotated the housing | casing 4 and made the upper housing | casing 4 approach the lower housing | casing 5. FIG. Part (c) of FIG. 8 is an enlarged view of a region A surrounded by a broken line in part (b) of FIG. The tip of the claw portion 41 faces slightly upward, and the upper end thereof is in contact with the lower surface of the beam portion 55. Therefore, in a state where the upper housing 4 is assembled to the lower housing 5, the beam portion 55 applies a downward force to the claw portion 41. The first protrusion 52-1 applies a downward force to the first recess 42-1, and the second protrusion 52-2 applies a downward force to the second recess 42-2. Call. Therefore, the upper housing 4 receives a downward force from the lower housing 5 at each of the front claw portion 41 and the rear first concave portion 42-1 and the second concave portion 42-2. The upper housing 4 receives an upward force from the upper end surface 54a-1 of the first side wall 54-1 and the upper end surface 54a-2 of the second side wall 54-2. Further, the upper housing 4 receives an upward force by the heat radiation sheet 11 on the upper surface of the light emitting element 7 and the circuit board 8. Therefore, the upper housing 4 receives both an upward force and a downward force, and does not rattle in the vertical direction indicated by the arrow D3 in FIG. In addition, since the thickness of the middle part until the nail | claw part 41 protrudes from the upper housing | casing 4 to the front side and reaches a front-end | tip is made thinner than another part, the nail | claw part 41 faces down from the beam part 55 Even if the force is received, the downward force can be absorbed by the portion of the claw portion 41 where the thickness is reduced. For this reason, it is possible to avoid the downward force from deforming the entire upper housing 4.

  Further, the first protrusion 52-1 is fitted into the first recess 42-1, the second protrusion 52-2 is fitted into the second recess 42-2, and the first recess 42-1 is fitted into the first recess 42-2. Since the first protrusion 52-1 restricts the second recess 42-2 from moving in the front-rear direction by the second protrusion 52-2, the upper housing 4 is indicated by an arrow D4 in FIG. It does not rattle in the front-rear direction shown. And since the overhang | projection part 45 which protruded below from the lower surface of the upper housing | casing 4 is pinched | interposed by the side wall 54 of the lower housing | casing 5, the movement to the left-right direction shown by the arrow D5 in FIG. As described above, the upper casing 4 assembled to the lower casing 5 does not come off or rattle.

  While the principles of the invention have been illustrated and described in the preferred embodiments, it will be appreciated by those skilled in the art that the invention can be modified in arrangement and detail without departing from such principles. The present invention is not limited to the specific configuration disclosed in the present embodiment. We therefore claim all modifications and changes that come within the scope and spirit of the following claims.

  DESCRIPTION OF SYMBOLS 1 ... Optical module, 2 ... Main-body part, 3 ... Shield member, 4 ... Upper housing | casing, 5 ... Lower housing | casing, 6 ... Light receiving element (optical element), 7 ... Light emitting element (optical element), 8 ... Circuit board, DESCRIPTION OF SYMBOLS 9 ... Board | substrate holder, 11 ... Radiation sheet, 12 ... Front shield member, 13 ... Actuator, 14 ... Bale, 41 ... Claw part, 42-1 ... 1st recessed part, 42-2 ... 2nd recessed part, 43-1 ... 1st wall part, 43-2 ... 2nd wall part, 44-1 ... 1st edge | side, 44-2 ... 2nd edge | side, 51 ... Notch part, 52-1 ... 1st projection part 52-2 ... 2nd projection part, 53 ... Bottom wall, 54-1 ... 1st side wall, 54-2 ... 2nd side wall, 55 ... Beam part.

Claims (2)

An optical element;
A lower housing that houses the optical element;
A plate-shaped upper housing that covers the lower housing;
An optical module in which the upper housing is assembled to the lower housing,
The lower housing includes a single bottom wall, first and second side walls that rise from the bottom wall and face each other, and a beam portion that spans from the first side wall to the second side wall. Have
The beam portion is disposed on one end side in a direction of a reference axis extending along the bottom wall, the first side wall, and the second side wall in the lower housing,
The beam portion has a notch on the surface facing the bottom wall,
The first side wall has a first protrusion,
The first protrusion is provided on the other end side of the reference shaft and protrudes on the second side wall side,
The second side wall has a second protrusion,
The second protrusion is provided on the other end side of the reference shaft and protrudes toward the first side wall.
The surface of the first protrusion has a first surface region having a curved surface shape,
The surface of the second protrusion has a second surface region having a curved surface shape,
The first surface region is provided on the opposite side of the bottom wall in the first protrusion,
The second surface region is provided on the opposite side of the bottom wall in the second protrusion.
The upper casing has a claw portion and a first side and a second side extending in the direction of the reference axis,
The claw portion is provided at an end portion on the one end side of the upper casing,
The claw portion protrudes from the main body of the upper casing along the reference axis toward the one end side,
An end portion on the other end side of the first side has a first concave portion recessed on the second side side,
The end on the other end side of the second side has a second recess recessed in the first side,
The first side is located on the first sidewall;
The second side is located on the second sidewall;
An end surface of the first side wall extending along the bottom wall abuts on the upper housing,
An end surface of the second side wall extending along the bottom wall abuts on the upper housing,
The notch abuts the claw,
The first protrusion is fitted into the first recess;
The optical module, wherein the second protrusion is fitted into the second recess. The upper casing is connected to the first recess and extends to the bottom wall side, and the upper casing is connected to the second recess and extends to the bottom wall side. Two wall portions,
The first wall portion is inclined toward the second side as it goes from the first recess to the bottom wall,
2. The optical module according to claim 1, wherein the second wall portion is inclined toward the first side toward the bottom wall from the second concave portion.

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