JP2014228334A - Method of manufacturing optical detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing an optical detector capable of precisely positioning a light guiding member while simplifying assembling work.SOLUTION: In an optical detector 100, a holding member is composed of a first holding member 3 and a second holding member 4. The holding members 3 and 4 are respectively provided with engaging portions 3k and 4k for engaging a light guiding member 5, and fitting portions 3m and 4m for fixing the holding members 3 and 4 each other. In assembling, first, a substrate mounted with an optical detection element 6 for detecting light is attached to the first holding member 3. Next, a part of the light guiding member 5 is engaged with the engaging portion 3k of the first holding member 3, thereby temporarily attaching the light guiding member 5 to the first holding member 3. Then, the engaging portion 4k of the second holding member 4 is engaged with the other part of the light guiding member 5, and the fitting portion 4m of the second holding member 4 is fitted with the fitting portion 3m of the first holding member 3, thereby fixing the holding members 3 and 4 each other to clip the light guiding member 5 between the holding members 3 and 4.

Description

  The present invention relates to a method for manufacturing a photodetection device including a light guide member for guiding incident light to a photodetection element.

  2. Description of the Related Art Conventionally, a light detection device provided in a vehicle is known for automatically controlling the lighting and air conditioner of the vehicle. For example, as disclosed in Patent Documents 1 to 3, the light detection device detects the illuminance and the amount of solar radiation of light incident on the vehicle by a light detection element, and controls a lamp and an air conditioner based on the detection result. .

  As a specific structure of the photodetection device, a light passage portion that allows light to pass is provided on the light source side of the photodetection element. For example, Patent Document 1 includes an optical element such as a lens, and Patent Documents 2 and 3 include an opening of a housing.

  The photodetecting element is mounted on the substrate. For example, in Patent Document 1, after the substrate is held by the holding member, the holding member is housed in the housing. Thereby, the light detection element is disposed immediately below the light passage part, and the light that has passed through the light passage part can be detected by the light detection element.

  For example, in order to control the air conditioner and appropriately set the temperature in the passenger compartment, it is necessary not only to detect the brightness around the vehicle, but also to detect the light directly hitting the user who is on board. Therefore, it is necessary to detect the amount of light (such as the amount of infrared rays) from the predetermined oblique direction toward the vehicle interior. In addition, when detecting the brightness around the vehicle in order to control the lighting of the vehicle, in order to perform a control that more closely matches the brightness felt by the driver, light directed toward the vehicle from a predetermined oblique direction is used. It needs to be detected.

  Therefore, in Patent Document 2, a light guide body made of transparent or colored resin or glass is provided between the light passage portion (notch portion or cutout portion) and the light detection element. And the front light which passed the light passage part is permeate | transmitted the 1st light guide, and is guide | induced to the 1st photon detection element. In addition, the upper light that has passed through the light passage portion is incident from the incident surface of the first light guide, and then totally reflected at the boundary surface, thereby changing the optical path and guiding it to the first light detection element. Furthermore, the ambient light that has passed through the light passage portion is condensed by a condensing lens portion provided in the second light guide and guided to the second light detection element.

  In Patent Document 3, a prism having an incident surface divided into three inclined surfaces is provided between a light passage portion (opening portion) and three light detection elements. Of the light that has passed through the light passage portion, the forward light is guided to the first light detecting element by the first inclined surface, the upper left light is guided to the second light detecting element by the second inclined surface, and the upper right light is The three inclined surfaces lead to the third light detection element.

JP2011-226946A JP 2012-183886 A JP 2010-276421 A

  As in Patent Documents 2 and 3, when a light guide member (light guide or prism) is used, the degree of freedom of arrangement of the light detection elements with respect to the light passage portion can be increased. However, in order to reliably guide light incident from a predetermined direction to the light detection element by the light guide member, the light guide member must be accurately positioned and attached to the holding member. For this reason, the assembly work of the photodetection device becomes complicated.

  The subject of this invention is providing the manufacturing method of the photon detection apparatus which can position a light guide member accurately, while an assembly operation is easy.

  In the present invention, after the substrate on which the light detection element for detecting light is mounted is attached to the holding member, the holding member is housed in the housing, and between the light passing portion provided in the housing and the light detecting element. In the method of manufacturing a light detection device in which the light guide member is disposed, the holding member is configured by a first holding member that holds the substrate and a second holding member that is fitted to the first holding member. And the engaging part for engaging a light guide member and the fitting part for fixing each are provided in a 1st holding member and a 2nd holding member, respectively. In assembly, first, a part of the light guide member is engaged with the engaging portion of the first holding member, and the light guide member is temporarily fixed to the first holding member. Thereafter, the engaging portion of the second holding member is engaged with the other portion of the light guide member, and the engaging portion of the second holding member is engaged with the engaging portion of the first holding member, so that the first holding is performed. By fixing the member and the second holding member, the light guide member is sandwiched between the holding members.

  In this case, after temporarily fixing the light guide member to the first holding member, the light guide member is sandwiched between the two holding members by fitting and fixing the second holding member to the first holding member. Therefore, the light guide member can be accurately positioned by a simple assembly operation.

  According to the present invention, in the above-described method for manufacturing a light detection device, after the half on one side is engaged with the engaging portion of the first holding member with respect to the central axis of the light guide member, the second holding member is engaged with the second holding member. The holding member is approached from the side, the engaging portion of the second holding member is engaged with the other half of the center axis of the light guide member, and the fitting portion of the first holding member is engaged The fitting portion of the second holding member may be fitted.

  Further, according to the present invention, in the method for manufacturing the photodetecting device, the terminals of the connector portion provided on the first holding member and the substrate are soldered, the substrate is attached to the first holding member, and both holding members are then mounted. The light guide member may be sandwiched between the two holding members, and the light guide member may be disposed between the light passage portion and the light detection element.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the photodetector which can position a light guide member accurately can be provided, although an assembly operation is easy.

It is a perspective view of the photon detection apparatus by embodiment of this invention. It is sectional drawing of the photon detection apparatus of FIG. It is an exploded view of the photon detection apparatus of FIG. It is a perspective view of the 1st holding member with which the photon detection apparatus of FIG. 1 is equipped. It is a perspective view of the 2nd holding member with which the photon detection apparatus of FIG. 1 is equipped. It is the perspective view and sectional drawing of a light guide member with which the photon detection apparatus of FIG. 1 is equipped. It is sectional drawing which showed the fitting state of the holding member of FIG. 4 and FIG. 5, and the engagement state of the light guide member of FIG. It is sectional drawing which showed the incident state of the ambient light to the photon detection apparatus of FIG. It is sectional drawing which showed the incident state of the ambient light to the photon detection apparatus of FIG. It is sectional drawing which showed the incident state of the ambient light to the photon detection apparatus of FIG. It is sectional drawing which showed the incident state of the ambient light to the photon detection apparatus of FIG. It is sectional drawing of the photon detection apparatus by other embodiment of this invention. FIG. 10 is a cross-sectional view showing a state in which ambient light is incident on the light detection device of FIG. 9.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

  First, the structure of the photodetecting device 100 of the present embodiment will be described with reference to FIGS.

  The light detection device 100 is an auto light sensor for automatically controlling turning on / off of the headlight and taillight of an automobile. In FIG. 1, a perspective view of the light detection device 100 as viewed from above is shown in (a), and a perspective view of the light detection device 100 as viewed from below is shown in (b).

  As shown in FIGS. 2 and 3, the light detection device 100 includes a housing 1, a substrate 2, a first holding member 3, a second holding member 4, and a light guide member 5. 2 is a cross-sectional view taken along line AA of the photodetecting device 100 of FIG. FIG. 3 is an exploded view of the photodetecting device 100.

  The housing 1 is made of a synthetic resin molded product. The housing | casing 1 is formed in the box shape opened to the downward side. On the upper part of the housing 1, a flange 1t is formed. As shown in FIG. 2, claw portions 1 n are formed on both side surfaces 1 v and 1 w in the short direction of the housing 1. As shown in FIG. 3, a lock hole 1 r is formed on one side surface 1 x in the longitudinal direction of the housing 1. Similarly, a lock hole is also formed in the opposite side surface 1y of the housing 1 (not shown).

  An upwardly convex lens 1 a is provided on the upper surface of the housing 1. The lens 1a transmits, for example, an infrared component or a visible light component of incident light. Ambient light of the light detection device 100 passes through the lens 1 a and enters the housing 1. The lens 1a is an example of the “light passage portion” in the present invention.

  As shown in FIG. 2, a substrate 2, a first holding member 3, a second holding member 4, and a light guide member 5 are accommodated in the housing 1.

  The board | substrate 2 consists of a printed wiring board. As shown in FIG. 3, electronic components such as a light detection element 6 and a microcomputer (microcomputer) 7 are mounted on the substrate 2 to form an electric circuit such as a communication circuit 8. The substrate 2 is formed with a plurality of connection holes 2a, boss holes 2b, and key grooves 2c.

  FIG. 4 is a perspective view of the first holding member 3, in which FIG. 3 shows a state viewed from the left side in FIG. 3 and (b) shows a state viewed from the right side. The first holding member 3 is made of a synthetic resin molded product. Lock protrusions 3 r are formed on both side surfaces 3 x and 3 y in the longitudinal direction of the first holding member 3.

  As shown in FIG. 4A, a first attachment portion 3a and a connector portion 3c are formed on one side of the first holding member 3 in the short direction, and the other side is shown in FIG. 4B. As described above, the second attachment portion 3b is formed.

  As shown in FIG. 4A, a plurality of through holes 3d are formed above the connector portion 3c. As shown in FIG. 3, each pin terminal 9 is attached to the connector 3c by press-fitting a plurality of L-shaped pin terminals 9 into the respective through holes 3d. One end portion 9a of each pin terminal 9 protrudes downward at the connector portion 3c.

  As shown in FIG. 4B, the other end 9b of each pin terminal 9 protrudes to the second mounting portion 3b. A boss 3e, a key protrusion 3f, and a light guide hole 3g are formed in the second mounting portion 3b.

  As shown in FIG. 3 and FIG. 4A, a groove-like engagement portion 3k for engaging the light guide member 5 is formed on the back wall 3j of the first attachment portion 3a. On the upper part of the engaging part 3k, a wide part 3t is provided by expanding the engaging part 3k in the width direction. The lower part of the engaging portion 3k communicates with the light guide hole 3g.

  A pair of groove-like fitting portions 3m for fixing the second holding member 4 is formed laterally on opposite side walls 3p, 3q of the first mounting portion 3a. As shown in FIG. 7, a level difference 3n is formed in each fitting portion 3m.

  FIG. 7 is a diagram showing the fitted state of the holding members 3 and 4 and the engaged state of the light guide member 5, and shows a cross section viewed from above by cutting the members 3 to 5 along the B plane of FIG. 3. Show.

  FIG. 5 is a perspective view of the second holding member 4, and shows a state seen from the left side in FIG. 3 and (b) shows a state seen from the right side. The second holding member 4 is made of a synthetic resin molded product. The second holding member 4 is provided with a pair of fitting portions 4m for fixing the first holding member 3. Each fitting portion 4m is formed in an arm shape, and a lock portion 4n swelled in a trapezoidal shape toward the outside as shown in FIGS.

  As shown in FIG. 5B, a groove-like engagement portion 4 k for engaging the light guide member 5 is formed on the side surface 4 j of the second holding member 4. On the upper part of the engaging part 4k, there is provided a wide part 4t in which the engaging part 4k is widened in the width direction. An inclined surface 4i is provided below the engagement portion 4k.

  6A and 6B are views showing the light guide member 5, wherein FIG. 6A shows a perspective view and FIG. 6B shows a cross-sectional view. The light guide member 5 is made of a transparent synthetic resin. The light guide member 5 is provided with a shaft portion 5j extending in the direction of the central axis Q, an annular head portion 5h provided above the shaft portion 5j so as to surround the central shaft Q, and a lower portion of the head portion 5h. And the flange 5t.

  The head portion 5h is formed in a donut shape and has an outer diameter larger than that of the shaft portion 5j. An incident curved surface 5a is formed outside the head 5h. A funnel-shaped reflection curved surface 5b is formed inside the head 5h. Thereby, the incident curved surface 5a is provided in an annular shape around the central axis Q, and the reflective curved surface 5b is provided around the central axis Q so as to be inside the incident curved surface 5a and to face the incident curved surface 5a.

  The shaft portion 5j is formed in a columnar shape, and the lower end portion is bent at a right angle toward one side. A reflecting surface 5c is provided outside the bent portion of the shaft portion 5j so as to be inclined at a predetermined angle with respect to the central axis Q. In addition, an exit surface 5d that is parallel to the central axis Q and faces one side is provided at the tip of the shaft portion 5j. The flange 5t is formed in a rectangular parallelepiped shape.

  Next, a method for manufacturing (assembling) the photodetector 100 will be described.

  In FIG. 3, first, the substrate 2 is brought close to the holding member 3 from the side in a state where the light detection element 6 is opposed to the second mounting portion 3 b (FIG. 4B) of the first holding member 3. The end portions 9b (FIG. 4B) of the pin terminals 9 are passed through the connection holes 2a of the substrate 2. Further, the boss 3e (FIG. 4B) of the first holding member 3 is fitted into the boss hole 2b of the substrate 2, and the key protrusion 3f (FIG. 4B) of the first holding member 3 is inserted into the key groove 2c of the substrate 2. ). And the edge part 9b of each pin terminal 9 is soldered to the board | substrate 2 in the state which made the board | substrate 2 contact | abut to the contact surface 3i (FIG.4 (b)) of the 2nd attachment part 3b.

  Thereby, as shown in FIG. 2, the board | substrate 2 will be in the state hold | maintained at the 2nd attachment part 3b in the vertical orientation. In addition, the light receiving surface 6a of the light detecting element 6 mounted on the substrate 2 is in a state of facing the light guide hole 3g (FIG. 4B) of the first holding member 3.

  Next, the shaft part 5j and the flange part 5t of the light guide member 5 are inserted into the engaging part 3k and the wide part 3t in the first attachment part 3a of the first holding member 3 shown in FIG. Further, the vicinity of the light exit surface 5 d of the light guide member 5 is inserted into the light guide hole 3 g of the first holding member 3.

  Thereby, the half (right half in FIG. 2) on one side with respect to the central axis Q of the light guide member 5 is engaged with the engaging portion 3k, so that the light guide member 5 cannot move linearly and rotate. It will be in the state temporarily fixed to the 1st attachment part 3a. In addition, the exit surface 5 d of the light guide member 5 is exposed from the light guide hole 3 g and is opposed to the light receiving surface 6 a of the light detection element 6.

  Next, each fitting portion 4m of the second holding member 4 is inserted into each fitting portion 3m of the first attachment portion 3a of the first holding member 3, as shown in FIG. 7B. The locking portion 4n of each fitting portion 4m is engaged with the step 3n of each fitting portion 3m. Further, the shaft portion 5j, the flange portion 5t, and the reflecting surface 5c of the light guide member 5 are engaged with the engaging portion 4k, the wide portion 4t, and the inclined surface 4i of the second holding member 4, respectively. That is, the engaging portion 4k of the second holding member 4 is engaged with the half on the other side with respect to the central axis Q of the light guide member 5.

  Thereby, as shown in FIG. 2, the second holding member 4 is attached to the first attachment portion 3 a of the first holding member 3. That is, the holding members 3 and 4 are fixed to each other. Further, the light guide member 5 is sandwiched between the holding members 3 and 4. Furthermore, the head 5h of the light guide member 5 protrudes above the holding members 3 and 4, and the incident curved surface 5a and the reflective curved surface 5b are arranged on the lens 1a side.

  Next, the holding members 3 and 4 are inserted into the housing 1 from below, and the lock protrusions 3r of the first holding member 3 are engaged with the lock holes 1r of the housing 1 as shown in FIG.

  As a result, the first holding member 3 is fixed to the housing 1, and the substrate 2, the holding members 3, 4 and the light guide member 5 are accommodated in the housing 1, as shown in FIG. . That is, the photodetection device 100 is assembled.

  In the photodetecting device 100 assembled as described above, the light guide member 5 is positioned immediately below the lens 1a, and the central axis Q of the light guide member 5 and the lens 1a coincides. Further, the substrate 2 and the light receiving surface 6 a of the light detection element 6 are arranged in parallel with the central axis Q. The central axis Q is also the optical axis of the light guide member 5 and the lens 1a.

  Moreover, as shown in FIG.1 (b), the connector part 3c is opening in the lower end of the photon detection apparatus 100. FIG. A connector provided at one end of a harness (not shown) is fitted into the connector portion 3c. The other end of the harness is connected to a vehicle control device (not shown).

  Thereby, the vehicle control device and the microcomputer 7 on the board 2 are electrically connected via the harness, the pin terminal 9 of the connector portion 3c, the board 2, and the like, and the communication circuit 8 and the like can communicate with each other.

  As shown in FIG. 2, the light detection device 100 is inserted into a mounting hole 51 provided in the dashboard 50 of the automobile. Then, the light detection device 100 is attached to the dashboard 50 by engaging the flange portion 1t and the claw portion 1n of the housing 1 with the upper and lower edges of the attachment hole 51.

  Next, a state in which ambient light is incident on the light detection device 100 will be described with reference to FIGS. 8A to 8D.

For example, the light source such as the sun moves and the vehicle provided with the light detection device 100 also moves, so that the incident angle of ambient light that enters the vehicle from the outside of the vehicle changes. Lights having incident angles θ _{1 to} θ ₄ as shown by thick lines in FIGS. 8A to 8D pass through the lens 1a from above the light detection device 100, and enter from the incident curved surface 5a and the reflective curved surface 5b of the light guide member 5. Incident inside.

In this example, incident angles θ _{1 to} θ ₄ indicate inclination angles with respect to the central axis Q, and increase in the order of θ ₁ , θ ₂ , θ ₃ , θ ₄ (θ ₁ <θ ₂ <θ ₃ <Θ ₄ ). In addition, light having incident angles θ _{1 to} θ ₄ is not parallel to the central axis Q (θ ₁ , θ ₂ , θ ₃ , θ ₄ > 0 °). The light having the incident angle θ ₃ is ambient light (for example, θ ₃ = 30 ° to 70 °) that affects the lighting / extinguishing control of the vehicle lamp (headlight, taillight). The light having other incident angles θ ₁ , θ ₂ , and θ ₄ is an example of ambient light that does not significantly affect the lighting on / off control of the vehicle.

As shown by a thick line in FIG. 8A, the light incident on the incident curved surface 5a of the light guide member 5 at the incident angle θ ₁ is bent by the incident curved surface 5a, hits the holding members 3 and 4, and falls below the light detecting element 6. It will not be led towards. Also, of the incident on the reflection curved surface 5b of the light guide member 5 at an incident angle theta ₁ light, some of the light, after being bent by the reflection curved surface 5b, is reflected by the reflecting surface 5c, light from the emission surface 5d Although it is emitted toward the detection element 6, it is not received by the light receiving surface 6 a of the light detection element 6.

8B and 8D, the light incident on the incident curved surface 5a of the light guide member 5 at the incident angles θ ₂ and θ ₄ is bent by the incident curved surface 5a and then reflected by the reflective curved surface 5b. Thus, the light does not hit the first holding member 3 and be guided toward the lower light detection element 6. In addition, the light incident on the reflection curved surface 5b of the light guide member 5 at the incident angles θ ₂ and θ ₄ is bent by the reflection curved surface 5b and is not guided toward the light detection element 6 below.

Furthermore, from all other directions different from the light shown by the thick lines in FIGS. 8A, 8B, and 8D, the incident curved surfaces 5a and reflective curved surfaces 5b of the light guide member 5 are incident at the incident angles θ ₁ , θ ₂ , and θ _4. Similarly, the incident light is not guided toward the light detection element 6.

On the other hand, as indicated by a thick line in FIG. 8C (a), the light incident on the incident curved surface 5a of the light guide member 5 at the incident angle θ ₃ is bent by the incident curved surface 5a and then reflected by the reflective curved surface 5b. Proceeds downward in the shaft portion 5j. Then, this light is reflected by the reflecting surface 5 c, emitted from the emitting surface 5 d toward the light detecting element 6, and received by the light receiving surface 6 a of the light detecting element 6.

Also, from all directions other that is different from the light indicated by a thick line in FIG. 8C (a), the light incident on the incident curved surface 5a of the light guide member 5 at an incident angle theta ₃ also, for example, a thick line in FIG. 8C (b) As shown, after being bent by the incident curved surface 5a, it is reflected by the reflective curved surface 5b and proceeds downward in the shaft portion 5j. Then, this light is reflected by the reflecting surface 5 c, emitted from the emitting surface 5 d, and received by the light receiving surface 6 a of the light detection element 6.

The light incident on the reflection curved surface 5b of the light guide member 5 at an incident angle theta ₃ is bent by the reflection curved surface 5b, it will not be directed towards the lower of the photodetecting element 6.

As described above, the incident curved 5a and the reflection curved surface 5b of the light guide member 5 for guiding the incident light at an incident angle theta ₃ on the light receiving surface 6a of the light detecting element 6 can be designed in the following procedure.

  First, an arbitrary straight line (corresponding to light) is drawn from the light receiving surface 6a of the light detection element 6 toward the reflective surface 5c of the light guide member 5, and the straight line is reflected on the reflective surface 5c to temporarily set the reflection curved surface 5b. Find the point X (not shown) that hits. Next, the curvature of the reflection curved surface 5b at the point X is temporarily set as A. Then, the straight line hitting the point X is reflected by the reflection curved surface 5b according to the curvature A, passes through the inside of the head 5h, and hits the temporarily set incident curved surface 5a. A point where the straight line collides with the incident curved surface 5a is defined as Y (not shown), and a curvature of the incident curved surface 5a is temporarily set as B.

The light emitted from the point Y into the air is refracted at an angle determined from the relative refractive index between the light guide member 5 and air and the curvature B of the incident curved surface 5a. The relative refractive index of the light guide member 5 and air is determined by the material of the light guide member 5. Next, a curvature B is obtained such that the angle of light emitted from the point Y into the air coincides with the inclination angle θ ₃ with respect to the central axis Q. Then, the shape of the incident curved surface 5a and the reflective curved surface 5b is determined by repeating the above-described series of operations while slightly changing the angle of the straight line drawn from the light receiving surface 6a toward the reflective surface 5c.

  Incidentally, the light detecting element 6 detects the illuminance of the light received by the light receiving surface 6a. Then, based on the detection result of the light detection element 6, the microcomputer 7 (FIG. 3) determines the brightness of the surroundings of the vehicle, and issues a headlight and taillight turn-on or turn-off command to the communication circuit 8 (FIG. 3). To output to the vehicle control device. The vehicle control device turns on the headlamp and the taillight when receiving a lighting command from the light detection device 100, and turns off the headlight and the taillight when receiving a turn-off command from the light detection device 100.

  Further, the microcomputer 7 controls the air conditioner based on the illuminance of the light detected by the light detection element 6 and the illuminance of the infrared rays included in the light, and adjusts the temperature in the passenger compartment. In the present embodiment, the light detection element 6 is shared for controlling lights such as headlights and taillights of a vehicle and for controlling an air conditioner.

  According to the above embodiment, the light guide member 5 is temporarily fixed to the first mounting portion 3 a of the first holding member 3, and then the second holding member 4 is fitted and fixed to the first holding member 3. The light guide member 5 can be sandwiched between the members 3 and 4. For this reason, the light guide member 5 can be accurately positioned by a simple assembly operation.

  Even if the shaft portion 5j of the light guide member 5 is bent sideways in the middle, the half on the one side with respect to the central axis Q of the light guide member 5 is engaged with the first holding member 3. It can be easily engaged with the portion 3k. After that, the second holding member 4 is attached to the first holding member 3 from the side, and the engaging portion 4k of the second holding member 4 is halved on the other side with respect to the central axis Q of the light guide member 5. Can be easily engaged.

  Further, for example, when the light guide member 5 is sandwiched between the holding members 3 and 4 before the pin terminals 9 of the first holding member 3 and the substrate 2 are soldered, flux that flows out during the soldering or the like may be generated. The light guide performance of the light guide member 5 may be deteriorated.

  However, in the above embodiment, since the light guide member 5 is sandwiched between the holding members 3 and 4 after the pin terminal 9 and the substrate 2 are soldered, the flux flowing out during soldering causes the light guide member 5 to flow. It is possible to prevent the light guide performance of the light guide member 5 from deteriorating.

  In the present invention, various embodiments other than those described above can be adopted. For example, in the above-described embodiment, the example in which the substrate 2 on which the light detection element 6 is mounted is arranged in the vertical direction parallel to the central axis Q is shown, but the present invention is not limited to this. In addition to this, for example, as shown in FIG. 9, the substrate 2 ′ and the light receiving surface 6 a of the light detecting element 6 mounted on the substrate 2 ′ may be arranged perpendicular to the central axis Q.

In this case, an exit surface 5d ′ may be provided at the lower end of the shaft portion 5j ′ of the light guide member 5 ′, and the reflection surface 5c shown in FIG. Further, the light receiving surface 6a of the light detecting element 6 may be provided so as to face the emitting surface 5d ′. Thus, light incident on the incident curved surface 5a of the light guide member 5 from all directions through the lens 1a at a predetermined inclination angle theta _3, for example FIG. 10 (a), the as shown by the bold line (b), the After being bent by the incident curved surface 5a, it is reflected by the reflective curved surface 5b. Then, the light travels downward along the shaft portion 5j ′, is emitted from the emission surface 5d ′, and is received by the light receiving surface 6a of the light detection element 6.

  9 and 10, when the light guide member 5 ′ in which the shaft portion 5 j ′ is straight with respect to the central axis Q is used, the first fitting that fits in the vertical direction parallel to the central axis Q is performed. A holding member and a second holding member may be used.

  The first holding member and the second holding member are not limited to a separate two-piece structure, and may be integrated with a hinge structure or the like. In that case, in a state where the engaging portion of the first holding member and the engaging portion of the second holding member are separated, a part of the light guide member is engaged with the engaging portion of the first holding member, and the first The light guide member is temporarily fixed to the holding member. Thereafter, the engaging portion of the second holding member may be engaged with the other portion of the light guide member, and the fitting portion of the first holding member and the fitting portion of the second holding member may be fitted.

  Moreover, in the above embodiment, although the board | substrate 2 was attached to the 1st holding member 3, the example which clamped the light guide member 5 with the holding members 3 and 4 was shown, However, This invention is not limited only to this. Absent. Conversely, the substrate may be attached to the first holding member after the light guide member is sandwiched between the first holding member and the second holding member.

  Moreover, although the example which provided the convex lens 1a which faced upwards on the upper part of the housing | casing 1 as an optical passage part was shown in the above embodiment, this invention is not limited only to this. Instead of this, for example, a downwardly convex lens, a concave lens, or an optical element that allows light other than the lens to pass therethrough may be provided as the light passage portion. Further, the light passage part may be a flat plate part without irregularities. Furthermore, a simple hole or opening may be provided as the light passage portion.

  Further, in the above embodiment, the example in which the present invention is applied to the light detection device 100 for automatically controlling turning on / off of the headlight and taillight of the automobile is described. The present invention can also be applied to a light detection device for controlling the above.

DESCRIPTION OF SYMBOLS 1 Case 1a Lens 2, 2 'Board | substrate 3 1st holding member 3c Connector part 3k Engagement part 3m Fitting part 4 2nd holding member 4k Engagement part 4m Fitting part 5, 5' Light guide member 6 Photodetection element 9 Pin terminal 100 Photodetector Q Center axis

Claims (3)

A substrate on which a light detection element for detecting light is mounted is attached to a holding member, and then the holding member is housed in a housing, and is guided between the light passage portion provided in the housing and the light detection element. In the manufacturing method of the photodetection device in which the optical member is arranged,
The holding member is composed of a first holding member that holds the substrate and a second holding member that fits into the first holding member,
The first holding member and the second holding member are each provided with an engaging portion for engaging the light guide member and a fitting portion for fixing each other,
After engaging a part of the light guide member with the engaging portion of the first holding member and temporarily fixing the light guide member to the first holding member,
Engaging the engaging part of the second holding member with the other part of the light guide member, and engaging the engaging part of the second holding member with the engaging part of the first holding member; A method of manufacturing a photodetecting device, comprising: fixing the first holding member and the second holding member to sandwich the light guide member between the two holding members. In the manufacturing method of the photon detection device according to claim 1,
After engaging the half of one side with respect to the central axis of the light guide member to the engaging portion of the first holding member,
The second holding member is approached from the side to the first holding member,
The engagement portion of the second holding member is engaged with the other half of the center axis of the light guide member, and the fitting portion of the second holding member is engaged with the fitting portion of the first holding member A method of manufacturing a photodetection device, characterized by comprising: In the manufacturing method of the photon detection device according to claim 1 or 2,
After soldering the terminal of the connector portion provided on the first holding member and the substrate, and attaching the substrate to the first holding member,
Sandwiching the light guide member between the holding members,
Next, the holding member is housed in the housing, and the light guide member is disposed between the light passage portion and the light detection element.

Images