Manufacturing method of electrode means

Abstract

To provide element placement means becoming capable of easily attaching a light-emitting element and a light-receiving element thereto, and to provide a manufacturing method of the element installation means, and a manufacturing method of a smoke detector thereof.SOLUTION: According to an element placement part 15 where a light-emitting part 17 and a light-receiving part 18 of a sensor for sensing smoke by receiving scattering light generated by scattering light from the light-emitting part 17 due to the smoke, with the light-receiving part 18 are placed; there are provided a conductive light-emitting side electrode part for placing the light-emitting part 17 via electrical connection thereof, and a conductive light-receiving side electrode part for placing the light-receiving part 18 via electrical connection thereof. The light-emitting side electrode part and the light-receiving side electrode part are integrally formed on a common lead frame. The light-emitting side electrode part and the light-receiving side electrode part are arranged by corresponding to a first element angle constituting a scattering angle indicated by an intersection angle between a light-emitting axis of the light-emitting part 17 and a light-receiving axis of the light-receiving part 18.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an element mounting means, a method for manufacturing an electrode means, and a method for manufacturing a smoke detector.

Background Art

[0002] Conventionally, there has been known a smoke detector that receives scattered light scattered by smoke in a smoke detection space from a light emitting element with a light receiving element to detect smoke (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a conventional smoke detector, since the light emitting element and the light receiving element are directly attached to a smoke detection unit main body for partitioning a part of the smoke detection space in the smoke detector, it is necessary to accurately attach each element to a relatively narrow portion (for example, a recess for attaching each element, etc.) in the smoke detection unit main body, which may be troublesome. Therefore, there has been a demand for a technology that enables easy attachment of the light emitting element and the light receiving element.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide an element mounting means, a method for manufacturing an electrode means, and a method for manufacturing a smoke detector that enable easy attachment of a light emitting element and a light receiving element.

Means for Solving the Problems

[0006] In order to solve the above-described problems and achieve the object, the method for manufacturing electrode means according to claim 1 is a method for manufacturing electrode means in element mounting means for mounting a light-emitting element and a light-receiving element of a smoke detector that receives scattered light scattered by smoke from a light-emitting element with the light-receiving element to detect the smoke, the method comprising: a step of integrally forming on a common frame body electrode means including conductive light-emitting element side electrode means for mounting while electrically connecting the light-emitting element, and conductive light-receiving element side electrode means for mounting while electrically connecting the light-receiving element that forms a pair with the light-emitting element side electrode means; a step of holding the light-emitting element side electrode means and the light-receiving element side electrode means in the common frame body with an insulating member common to the pair; and a step of separating from the common frame body the pair of element mounting means in which the light-emitting element side electrode means and the light-receiving element side electrode means are held in a mutually insulated state by the insulating member common to the pair.

[0007] Further, the method for manufacturing electrode means according to claim 2 is the method for manufacturing electrode means according to claim 1, wherein the light-emitting element side electrode means and the light-receiving element side electrode means are arranged corresponding to a first element angle that constitutes a scattering angle indicated by an intersection angle between the light-emitting axis of the light-emitting element and the light-receiving axis of the light-receiving element.

[0008] Further, the method for manufacturing electrode means according to claim 3 is the method for manufacturing electrode means according to claim 1, the method comprising a step of integrally forming on the common frame body shield means that functions as an electromagnetic shield for the light-receiving element, together with the light-emitting element side electrode means and the light-receiving element side electrode means.

[0009] Further, the method for manufacturing electrode means according to claim 4 is the method for manufacturing electrode means according to claim 1, the method further comprising a step of bending the light-emitting element side electrode means or the light-receiving element side electrode means according to a scattering angle indicated by an intersection angle between the light-emitting axis of the light-emitting element and the light-receiving axis of the light-receiving element.

Advantages of the Invention

[0010] According to the manufacturing method of the electrode means described in claim 1, the problems of the present application can be solved.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Figure 20

Best Mode for Carrying Out the Invention

[0012] Hereinafter, embodiments of the element mounting means, the manufacturing method of the electrode means, and the manufacturing method of the smoke detector according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited by the embodiments.

[0013] 〔Basic Concept of Embodiment〕 First, the basic concept of the embodiment will be described.

[0014] The "element mounting means" is means for mounting a light emitting element and a light receiving element of a smoke detector that detects smoke by receiving scattered light scattered by smoke from the light emitting element with the light receiving element. For example, it includes a light emitting element side electrode means and a light receiving element side electrode means.

[0015] The "light emitting element side electrode means" is a conductive element for mounting while electrically connecting the light emitting element, and the "light receiving element side electrode means" is a conductive element for mounting while electrically connecting the light receiving element. And the light emitting element side electrode means and the light receiving element side electrode means are integrally formed on a common frame body.

[0016] And in the embodiment shown below, a smoke detector installed on a ceiling which is an installation surface is exemplified to explain each component of the present application.

[0017] [Specific Content of Embodiment] Next, the specific content of the embodiment will be described.

[0018] (Configuration) First, the configuration of the detector will be described. FIG. 1 is a diagram for explaining the installation state of the detector, and FIG. 2 is an exploded perspective view of some components of the detector.

[0019] The sensor 100 in FIG. 1 is a smoke sensor installed on the ceiling, which is the installation surface of the area to be monitored, for detecting a fire occurring in the area to be monitored. Here, the "area to be monitored" is the area to be monitored by the sensor 100, and includes, for example, concepts such as a room in a building, a staircase room, or any other arbitrary area.

[0020] In the example of FIG. 1, the case where it is directly installed on the installation surface of the sensor 100 is illustrated, but for example, it may be configured to be installed via a mounting base.

[0021] The sensor 100 includes, for example, the outer cover 11 in FIG. 1, the smoke detection unit cover 12 in FIG. 2, the insect screen 13, the smoke detection unit main body 14, the element mounting unit 15, the circuit board 16, the light emitting unit 17, and the light receiving unit 18. The circuit board 16 has a light emission control circuit for driving the light emitting unit 17 described later and a light reception processing circuit for processing the light reception signal (the signal photoelectrically converted) from the light receiving unit 18, and the light emission side connection part 212 and the light reception side connection part 312 described later are electrically connected thereto respectively.

[0022] (Configuration - Outer cover, smoke detection unit cover, insect screen) The outer cover 11 in FIG. 1 is a housing means for housing the components of the sensor 100.

[0023] The smoke detection unit cover 12 in FIG. 2 forms the smoke detection space 122 (FIG. 1), and includes, for example, a labyrinth 121 that allows the inflow or outflow of smoke while blocking light from the outside with respect to the smoke detection space 122.

[0024] The insect screen 13 is a net for preventing insects from entering the inside of the smoke detection space 122, and is, for example, annular so as to cover the outer periphery of the labyrinth 121.

[0025] (Configuration - Smoke detection unit main body) Figures 3 and 4 are perspective views of the smoke detection unit main body. The smoke detection unit main body 14 in Figure 2 forms a smoke detection space 122 together with the smoke detection unit cover 12, and a circuit board 16 is attached thereto. The smoke detection unit main body 14 includes, for example, a light emitting element opening 141 and a light receiving element opening 142 as shown in Figures 3 and 4.

[0026] The light emitting element opening 141 is an opening for irradiating light from a light emitting unit 17 installed on the back side (the side shown in Figure 4) of the smoke detection unit main body 14 into the smoke detection space 122 provided on the front side (the side shown in Figure 3) of the smoke detection unit main body 14. For example, it is an opening that penetrates from the back side to the front side in the smoke detection unit main body 14.

[0027] The light receiving element opening 142 is an opening for irradiating light (specifically, scattered light) from the smoke detection space 122 provided on the front side of the smoke detection unit main body 14 onto a light receiving unit 18 installed on the back side of the smoke detection unit main body 14. For example, it is an opening that penetrates from the back side to the front side in the smoke detection unit main body 14.

[0028] (Configuration - Element Mounting Portion) The element mounting portion 15 in Figure 2 is an element mounting means for mounting the light emitting unit 17 and the light receiving unit 18, and is, for example, mounted on the circuit board 16. Details of the element mounting portion 15 will be described later.

[0029] (Configuration - Circuit Board) The circuit board 16 in Figure 2 is a board on which various electric circuits are mounted, and is, for example, a rigid board having a predetermined shape provided on the back side of the smoke detection unit main body 14.

[0030] (Configuration - Light Emitting Unit) The light emitting unit 17 in Figure 2 is a light emitting element that irradiates light onto the smoke detection space 122, and is, for example, a light emitting diode (LED: Light Emitting Diode).

[0031] (Configuration - Light Receiving Unit) The light receiving unit 18 in Fig. 2 is a light receiving element for irradiating light (specifically, scattered light) from the smoke detection space 122 and detecting the light, and is, for example, a photo diode (PD).

[0032] (Configuration - Details - Element Mounting Portion) Next, the details of the element mounting portion 15 will be described. Figs. 5 and 6 are perspective views of the element mounting portion, Fig. 7 is a front view of the element mounting portion, Fig. 8 is a plan view of the element mounting portion, Fig. 9 is a rear view of the element mounting portion, Fig. 10 is a bottom view of the element mounting portion, Fig. 11 is a right side view of the element mounting portion, and Fig. 12 is a left side view of the element mounting portion.

[0033] In Figs. 5 and 6, the optical axes of the light emitting unit 17 and the light receiving unit 18 are shown by dashed-dotted lines. Also, it may be interpreted that the dashed-dotted optical axis extending from the light emitting unit 17 corresponds to the "emission axis", and the optical axis extending from the light receiving unit 18 corresponds to the "light receiving axis". Further, (a), (b), and (c) in Fig. 7 show the states as viewed from the A1 direction, A2 direction, and A3 direction in Fig. 8. Also, in Figs. 7 to 12, the X - Y - Z axes will be described as being mutually orthogonal.

[0034] The element mounting portion 15 in Fig. 2 is an element mounting means for mounting the light emitting unit 17 and the light receiving unit 18, and is, for example, attached and fixed to the circuit board 16. The element mounting portion 15 holds the light emitting unit 17 and the light receiving unit 18 so that, as shown in Figs. 5 and 6, a scattering angle 900 within a predetermined angle range is formed.

[0035] The "scattering angle" 900 is an angle formed at the intersection point P where the optical axis of the light emitting unit 17 and the optical axis of the light receiving unit 18 intersect, and is an angle indicated by the intersection angle at the intersection point P. Specifically, it is an angle on the plane passing through each optical axis forming the intersection point P. In the sensor 100, actually, the intersection point P will be formed within the smoke detection space 122 (Fig. 1).

[0036] The specific angle of the scattering angle 900 is arbitrary. For example, in order to reduce the sensitivity difference for various smoke particle diameters, an angle of about 60 degrees to 90 degrees is preferable, and in this embodiment, it is configured to be within this angle range. Further, in this embodiment, the angle of the scattering angle 900 is determined by the first element angle 901 (FIG. 14 to be described later) and the second element angle 902 (FIGS. 7(b) and 7(c)).

[0037] Note that the "first element angle" 901 is determined by the direction in which the light-emitting side electrode portion 21 and the light-receiving side electrode portion 31 are directed in the lead frame 400, as shown in FIG. 14 to be described later.

[0038] Also, the "second element angle" 902 is determined by the inclination of the light-emitting side holding portion 22 and the light-receiving side holding portion 32 with respect to the holding member 4, as shown in FIGS. 7(b) and 7(c). Note that the angles of these two second element angles 902 may be the same as each other, or may be different from each other.

[0039] The element mounting portions 15 in FIGS. 5 and 6 include, for example, a light-emitting side mounting portion 2, a light-receiving side mounting portion 3, and a holding member 4.

[0040] (Configuration - Details - Element Mounting Portion - Light-Emitting Side Mounting Portion) The light-emitting side mounting portion 2 in FIGS. 5 and 6 is a portion for mounting the light-emitting portion 17 on the circuit board 16, and includes, for example, a light-emitting side electrode portion 21 (see also FIG. 14 to be described later) and a light-emitting side holding portion 22 (FIGS. 5 and 6).

[0041] (Configuration - Details - Element Mounting Portion - Light-Emitting Side Mounting Portion - Light-Emitting Side Electrode Portion) The light-emitting side electrode portion 21 (see also FIG. 14 to be described later) is a conductive light-emitting element side electrode means for electrically connecting the light-emitting portion 17 to the electric circuit of the circuit board 16 and mounting it on the circuit board 16, and is, for example, a metal portion. The light-emitting side electrode portion 21 includes, for example, a light-emitting side lead portion 211 (FIG. 6) and a light-emitting side connection portion 212 (see also FIG. 15 to be described later).

[0042] The light-emitting side lead portion 211 is a conductive wire electrically connected to the anode terminal and the cathode terminal of the light-emitting portion 17 mounted on the light-emitting side mounting portion 2, and a part of it is held by the holding member 4. As shown in FIG. 6, for example, a part of the tip side of the light-emitting side lead portion 211 is bent inside the light-emitting side lead opening 41 and protrudes toward the back side (the -Z direction in FIG. 7(a) etc.). A part of the light-emitting side lead portion 211 on the side opposite to the tip side is bent by the second element angle 902 as shown in FIG. 7(b).

[0043] The light-emitting side connection portion 212 (see also FIG. 15 described later) is a portion continuous from the light-emitting side lead portion 211, and is a portion where the anode terminal and the cathode terminal of the light-emitting portion 17 mounted on the light-emitting side mounting portion 2 come into contact and are electrically connected.

[0044] (Configuration - Details - Element Mounting Portion - Light-Emitting Side Mounting Portion - Light-Emitting Side Holding Portion) The light-emitting side holding portion 22 in FIGS. 5 and 6 is an insulating portion (for example, a resin-made portion) that holds a part of the light-emitting side electrode portion 21, and is a portion that is substantially rectangular as a whole, and includes a light-emitting side support portion 221 (FIG. 6), a light-emitting side protruding portion 222 (FIG. 6), and a light-emitting side opening 223 (FIG. 5).

[0045] The light-emitting side support portion 221 is a support means for supporting the light-emitting side holding portion 22. For example, with respect to the holding member 4 (FIG. 7(b)) provided on the circuit board 16 and parallel to the circuit board 16, it is configured to support the light-emitting side holding portion 22 in a state inclined by the second element angle 902.

[0046] The light-emitting side protruding portion 222 is a protruding portion for positioning the light-emitting side mounting portion 2 with respect to the circuit board 16, and is, for example, a portion inserted into a hole or a groove provided at a predetermined position of the circuit board 16.

[0047] The light-emitting side opening 223 is a substantially rectangular opening provided at the position on the light-emitting side holding part 22 where the light-emitting part 17 is attached. For example, it is an opening that exposes the light-emitting side connection part 212 (see also FIG. 15 described later).

[0048] (Configuration - Details - Element Mounting Part - Light-Receiving Side Mounting Part) The light-receiving side mounting part 3 in FIGS. 5 and 6 is a part for mounting the light-receiving part 18 on the circuit board 16. For example, it includes a light-receiving side electrode part 31 (see also FIG. 14 described later) and a light-receiving side holding part 32 (FIGS. 5 and 6).

[0049] (Configuration - Details - Element Mounting Part - Light-Receiving Side Mounting Part - Light-Receiving Side Electrode Part) The light-receiving side electrode part 31 (see also FIG. 14 described later) is a conductive light-receiving element side electrode means for mounting the light-receiving part 18 on the circuit board 16 while electrically connecting it to the electric circuit of the circuit board 16. For example, it is a part made of metal. The light-receiving side electrode part 31 includes, for example, a light-receiving side lead part 311 (FIG. 6), a light-receiving side connection part 312 (see also FIG. 16 described later), a shield part 313 (FIG. 6), a shield side lead part 314 (FIG. 6), and a shield side connection part 315 (see also FIG. 16 described later).

[0050] The light-receiving side lead part 311 is a conductive wire electrically connected to the anode terminal and the cathode terminal of the light-receiving part 18 mounted on the light-receiving side mounting part 3, and a part of it is held by the holding member 4. A part of the tip side of the light-receiving side lead part 311 is bent, for example, inside the light-receiving side lead opening 42 as shown in FIG. 6 and protrudes toward the back side (the -Z direction in FIGS. 7(a), etc.). A part of the light-receiving side lead part 311 on the side opposite to the tip side is bent by the second element angle 902 as shown in FIG. 7(c).

[0051] The light-receiving side connection part 312 (see also FIG. 16 described later) is a part continuous from the light-receiving side lead part 311, and is a part where the anode terminal and the cathode terminal of the light-receiving part 18 mounted on the light-receiving side mounting part 3 come into contact and are electrically connected.

[0052] The shield portion 313 is shield means that functions as a shield for preventing or reducing noise of the light receiving portion 18 mounted on the light receiving side mounting portion 3, is a portion having a substantially rectangular shape, and is a portion provided on the back side of the light receiving portion 18. Further, the shield portion 313 is a portion formed by extending from a part of the light receiving side electrode portion 31.

[0053] The shield side lead portion 314 is a conductive wire electrically connected to the shield portion 313, and is, for example, a portion where the tip side protrudes toward the back side (-Z direction in FIG. 7(a) etc.).

[0054] The shield side connection portion 315 (see also FIG. 16 described later) is a portion continuous from the shield portion 313, and is a portion that contacts the case of the light receiving portion 18 mounted on the light receiving side mounting portion 3.

[0055] (Configuration - Details - Element Mounting Portion - Light Receiving Side Mounting Portion - Light Receiving Side Holding Portion) The light receiving side holding portion 32 in FIGS. 5 and 6 is an insulating portion (for example, a resin portion) that holds a part of the light receiving side electrode portion 31, is a portion having a substantially rectangular shape as a whole, and includes a light receiving side support portion 321 (FIG. 6), a light receiving side protruding portion 322 (FIG. 6), and a light receiving side opening portion 323 (FIG. 5).

[0056] The light receiving side support portion 321 is support means for supporting the light receiving side holding portion 32, and is, for example, a portion configured to support the light receiving side holding portion 32 in a state inclined by the second element angle 902 with respect to a holding member 4 (FIG. 7(c)) provided on the circuit board 16 and parallel to the circuit board 16.

[0057] The light receiving side protruding portion 322 is a protruding portion for positioning the light receiving side mounting portion 3 with respect to the circuit board 16, and is, for example, a portion inserted into a hole or groove provided at a predetermined position of the circuit board 16.

[0058] The light-receiving side opening 323 is a substantially rectangular opening provided at the position on the light-receiving side holding portion 32 where the light-receiving portion 18 is attached. For example, it is an opening that exposes the light-receiving side connection portion 312 and the shield side connection portion 315 (see also FIG. 16 described later).

[0059] (Configuration - Detail - Element Mounting Portion - Holding Member) The holding member 4 in FIG. 6 is an insulating member (for example, a resin member) that holds the light-emitting side electrode portion 21 and the light-receiving side electrode portion 31. As shown in FIG. 8, for example, it is an insulating member that is bent so that a predetermined angle (specifically, the first element angle 901 (see FIG. 14 described later)) is formed in a plan view.

[0060] As shown in FIG. 6, the holding member 4 includes, for example, a light-emitting side lead opening 41, a light-receiving side lead opening 42, and a holding member side protrusion 43.

[0061] The light-emitting side lead opening 41 is a through-opening provided at a position closer to the light-emitting side holding portion 22, and is an opening in which a part of the tip side of the light-emitting side lead portion 211 is disposed inside.

[0062] The light-receiving side lead opening 42 is a through-opening provided at a position closer to the light-receiving side holding portion 32, and is an opening in which a part of the tip side of the light-receiving side lead portion 311 is disposed inside.

[0063] The holding member side protrusion 43 is a protrusion for positioning the holding member 4 with respect to the circuit board 16, and is, for example, a portion that is inserted into a hole or a groove provided at a predetermined position of the circuit board 16.

[0064] (Manufacturing Method of Element Mounting Portion) Next, a manufacturing method of the element mounting portion 15 configured as described above will be explained. FIG. 13 is a plan view of a plurality of lead frames, FIG. 14 is a plan view of one lead frame, FIGS. 15 and 16 are enlarged views of a part of FIG. 14, FIG. 17 is a plan view showing a lead frame in a state where a holding member or the like is formed, FIG. 18 is a bottom view showing a lead frame in a state where a holding member or the like is formed, and FIG. 19 is a plan view showing a separated holding member or the like.

[0065] The "lead frame" 400 is a lead frame body, generally made of metal, and includes, for example, elements constituting at least a part of the element mounting portion 15.

[0066] ===Formation of the light emitting side electrode portion and the light receiving side electrode portion === First, as shown in FIG. 14, the light emitting side electrode portion 21 and the light receiving side electrode portion 31 are formed. In actual manufacturing, a plurality of lead frames 400 each including the light emitting side electrode portion 21 and the light receiving side electrode portion 31 are formed together. However, in this embodiment, the explanation will be given focusing on one lead frame 400. Here, for example, as shown in FIGS. 14 to 16, using an arbitrary method (for example, a method of pressing metal using a mold or other known methods), the light emitting side electrode portion 21 and the light receiving side electrode portion 31 made of metal with a predetermined thickness (for example, about 1 mm to 3 mm) are integrally formed on one lead frame 400.

[0067] In particular, for the light emitting side electrode portion 21 and the light receiving side electrode portion 31, as shown in FIG. 14, a first element angle 901, which is an angle determined by the direction in which each electrode portion extends (the direction shown by the dashed line in FIG. 14), is formed to be an angle that can form an appropriate scattering angle 900 (FIGS. 5 and 6) (that is, for example, a scattering angle 900 of about 60 degrees to 90 degrees as described above). As an example, it may be formed such that the first element angle 901 is 120 degrees.

[0068] Here, for example, in order to fix the light-emitting side electrode portion 21 and the light-receiving side electrode portion 31 to the lead frame 400, a plurality of fixing portions 401 are also integrally formed.

[0069] Also, here, for example, the light-emitting side electrode portion 21 and the light-receiving side electrode portion 31 may be formed simultaneously, or the light-receiving side electrode portion 31 may be formed after the light-emitting side electrode portion 21 is formed, or conversely, the light-emitting side electrode portion 21 may be formed after the light-receiving side electrode portion 31 is formed.

[0070] ===Retention of the light-emitting side electrode portion and the light-receiving side electrode portion=== Next, as shown in FIGS. 17 and 18, the light-emitting side electrode portion 21 and the light-receiving side electrode portion 31 (FIG. 14) are held by a common holding member 4. Here, for example, as shown in FIGS. 17 and 18, using an arbitrary method (for example, a method using insert molding or other known methods), the holding member 4, the light-emitting side holding portion 22, and the light-receiving side holding portion 32 are integrally formed with respect to one lead frame 400.

[0071] Note that here, for example, the holding member 4, the light-emitting side holding portion 22, and the light-receiving side holding portion 32 may be formed simultaneously, or they may be sequentially formed in an arbitrary order.

[0072] ===Separation of the holding member, etc.=== Next, as shown in FIG. 19, the light-emitting side electrode portion 21, the light-receiving side electrode portion 31, the holding member 4, the light-emitting side holding portion 22, and the light-receiving side holding portion 32 (hereinafter also referred to as "each element of the element mounting portion 15") are separated from other portions in the lead frame 400. Here, for example, by cutting the connection portions with the plurality of fixing portions 401 shown in FIG. 14, each element of the element mounting portion 15 is separated.

[0073] Note that here, for example, removal of the two removed portions 310 shown in FIG. 17 is also performed as a part of the light-receiving side electrode portion 31. By this procedure, for example, each of the two light-receiving side lead portions 311 in FIG. 16 is separated from the shield portion 313, so that the two light-receiving side lead portions 311 are electrically separated from each other.

[0074] ===Bending of the lead part (i.e., bending of the lead part)=== Next, as shown in FIGS. 5 to 12, by bending predetermined positions of the light-emitting side electrode part 21 and the light-receiving side electrode part 31, the element mounting part 15 is formed. Thus, the element mounting part 15 is manufactured.

[0075] (Manufacturing method of the sensor) Next, the manufacturing method of the sensor 1 will be described.

[0076] FIG. 20 is a front view showing a circuit board in a state where the element mounting part is mounted. Note that holes or grooves into which the protruding parts of the element mounting part 15 are inserted for positioning are provided on the surface of the circuit board 16 (the upper surface in the drawing of FIG. 20), and insertion holes through which the light-emitting side lead part 211, the light-receiving side lead part 311, and the shield side lead part 314 provided on the positioned element mounting part 15 are inserted are provided in the circuit board 16.

[0077] ===Mounting of each element=== First, the light-emitting part 17 and the light-receiving part 18 are mounted on the element mounting part 15 manufactured as described above. Here, for example, as shown in FIG. 5, the light-emitting part 17 is provided in the light-emitting side opening 223 (see also FIG. 19), and the light-receiving part 18 is provided in the light-receiving side opening 323 (see also FIG. 19). The specific fixing method is arbitrary. For example, it may be fixed by engagement or may be fixed using an adhesive (note that, unless otherwise specified, the fixing methods of other elements are the same).

[0078] In this case, for example, the anode terminal and the cathode terminal of the light-emitting part 17 are electrically connected to the light-emitting side connection part 212 in FIG. 19, that is, they are electrically connected to the light-emitting side lead part 211 (FIG. 6).

[0079] Also, in this case, for example, the anode terminal and the cathode terminal of the light receiving unit 18 are electrically connected to the light receiving side connection portion 312 in FIG. 19, that is, they are electrically connected to the light receiving side lead portion 311 (FIG. 6).

[0080] ===Mounting of the element mounting portion=== Next, as shown in FIG. 20, the element mounting portion 15 is mounted by fixing it to the circuit board 16. Here, for example, each protruding portion of the element mounting portion 15 is positioned by inserting it into the positioning holes or grooves of the circuit board 16, and the tip ends of the light emitting side lead portion 211, the light receiving side lead portion 311, and the shield side lead portion 314 are fixed in a state of being inserted through the insertion holes of the circuit board 16.

[0081] In this case, since the holding member 4 is parallel to the circuit board 16 and the light emitting side holding portion 22 and the light receiving side holding portion 32 are supported by the light emitting side support portion 221 and the light receiving side support portion 321, as shown in FIGS. 7(b) and (c), the second element angle 902 is maintained at a predetermined angle (a predetermined angle such that the angle of the scattering angle 900 (FIGS. 5 and 6) is, for example, about 60 degrees to 90 degrees).

[0082] After that, the light emitting side lead portion 211, the light receiving side lead portion 311, and the shield side lead portion 314 protruding from the back surface (the lower surface in the drawing of FIG. 20) of the circuit board 16 in FIG. 20 are connected to the electric circuit (including the wiring pattern) or the ground pattern of the circuit board 16 using solder or the like, thereby completing the mounting of the element mounting portion 15.

[0083] ===Attachment of each element=== Next, as shown in FIG. 2, the circuit board 16 in a state where the element mounting portion 15 is mounted is fixed to the back side of the smoke detection unit main body 14 using an arbitrary method (for example, a method of fixing using fixing screws). In this case, the optical axes of the light emitting unit 17 and the light receiving unit 18 shown in FIGS. 5 and 6 pass through the light emitting element opening 141 and the light receiving element opening 142 in FIGS. 3 and 4 and reach the front side of the smoke detection unit main body 14.

[0084] Next, the smoke detection unit cover 12 with the insect screen 13 attached is fixed to the front side of the smoke detection unit main body 14 by any method (for example, a method of engaging and fixing the mounting protrusions, or a method using an adhesive, etc.).

[0085] Next, the outer cover 11 (FIG. 1) is fixed to these smoke detection unit main bodies 14, etc. using any method (for example, a method of fixing using fixing screws, etc.). And in this case, the smoke detection space 122 shown in FIG. 1 is formed, and the intersection point P in FIGS. 5 and 6 will be provided inside the smoke detection space 122. Thus, the sensor 1 is manufactured.

[0086] (Operation of the sensor) Next, the operation of the sensor 1 will be described. Since the operation of the sensor 1 is well-known, only a general description will be given. Here, for example, the case where the sensor 100 is installed on the ceiling as shown in FIG. 1 will be described.

[0087] When a fire breaks out in the monitoring target area, smoke particles flow into the smoke detection space 122 through the opening of the outer cover 11 in the sensor 100. In this case, the light output from the light emitting unit 17 in FIGS. 5 and 6 is scattered by the inflowing smoke particles, and the light receiving unit 18 detects the scattered light, which is the light due to the scattering, and the sensor 100 will detect a fire.

[0088] (Effects of the embodiment) As described above, according to this embodiment, by providing the light emitting side electrode portion 21 and the light receiving side electrode portion 31, for example, it becomes possible to easily attach the light emitting unit 17 and the light receiving unit 18 to the sensor 100. Further, since the light emitting side electrode portion 21 and the light receiving side electrode portion 31 are integrally formed on the common lead frame 400, for example, it becomes possible to easily form the element mounting portion 15.

[0089] In addition, the light-emitting side electrode portion 21 and the light-receiving side electrode portion 31 are arranged corresponding to the first element angle 901 that constitutes the scattering angle 900. As a result, for example, in the sensor 100, it is possible to surely and easily form a scattering angle 900 at an appropriate angle (for example, about 60 degrees to 90 degrees).

[0090] In addition, by integrally forming the shield portion 313 on the lead frame 400, for example, it is possible to provide shielding for the light-receiving portion 18 in the element mounting portion 15.

[0091] In addition, the shield portion 313 is formed by extending from a part of the light-receiving side electrode portion 31. As a result, for example, the shield portion 313 can be integrally formed in the light-receiving side electrode portion 31, and it is possible to easily form the shield portion 313.

[0092] In addition, by providing the holding member 4 that holds the light-emitting side electrode portion 21 and the light-receiving side electrode portion 31, for example, the light-emitting side electrode portion 21, the light-receiving side electrode portion 31, and the holding member 4 can be made into one unit, and it is possible to facilitate handling.

[0093] In addition, the light-emitting portion 17 and the light-receiving portion 18 are electrically connected to the electric circuit of the circuit board 16 of the sensor 100 via the light-emitting side lead portion 211 and the light-receiving side lead portion 311. As a result, for example, it is possible to surely and easily electrically connect the light-emitting portion 17 and the light-receiving portion 18 to the electric circuit.

[0094] In addition, the shield portion 313 is electrically connected to the electric circuit ground (predetermined circuit ground) of the circuit board 16 of the sensor 100. As a result, for example, it is possible to improve the electromagnetic shielding effect of the shield portion 313 (that is, for example, the effect of preventing the element from being affected by electrical and magnetic external disturbance noise, or the effect of reducing such influence).

[0095] Further, by forming the light-emitting side electrode portion 21 and the light-receiving side electrode portion 31, for example, it becomes possible to easily attach the light-emitting portion 17 and the light-receiving portion 18 to the sensor 100. Further, by integrally forming the light-emitting side electrode portion 21 and the light-receiving side electrode portion 31 on the common lead frame 400, for example, it becomes possible to easily form the element mounting portion 15.

[0096] Further, by holding the light-emitting side electrode portion 21 and the light-receiving side electrode portion 31 with the common holding member 4 and separating the light-emitting side electrode portion 21, the light-receiving side electrode portion 31, and the holding member 4 from the common lead frame 400, for example, the light-emitting side electrode portion 21, the light-receiving side electrode portion 31, and the holding member 4 can be made into one unit and can be easily separated from the common lead frame 400.

[0097] Further, by bending the light-emitting side electrode portion 21 and the light-receiving side electrode portion 31 according to the scattering angle, for example, it becomes possible to surely and easily form a scattering angle 900 at an appropriate angle (for example, about 60 degrees to 90 degrees) in the sensor 100.

[0098] Further, by electrically connecting the light-emitting portion 17 and the light-receiving portion 18 to the light-emitting side electrode portion 21 and the light-receiving side electrode portion 31 integrally held by the holding member 4 and mounting the element mounting portion 15, for example, it becomes possible to easily attach the light-emitting portion 17 and the light-receiving portion 18 to the sensor 100. Further, by electrically connecting through the light-emitting side lead portion 211 and the light-receiving side lead portion 311, for example, it becomes possible to surely and easily electrically connect the light-emitting portion 17 and the light-receiving portion 18 to the electric circuit.

[0099] 〔Modifications to the Embodiment〕 Although the embodiments according to the present invention have been described above, the specific configurations and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. Hereinafter, such modifications will be described.

[0100] (Problems to be Solved and Effects of the Invention) First, the problems to be solved by the invention and the effects of the invention are not limited to the above-mentioned content, and may vary depending on the implementation environment and details of the configuration of the invention. It is possible to solve only some of the above-mentioned problems or achieve only some of the above-mentioned effects.

[0101] (Regarding Dispersion and Integration) Also, the above-described configuration is a functional concept and does not necessarily need to be physically configured as shown in the figure. That is, the specific form of dispersion and integration of each part is not limited to that shown in the figure, and all or part of it can be functionally or physically dispersed or integrated in any unit.

[0102] (Regarding the Shielding Part) Also, the shielding part 313 in FIG. 16 of the above embodiment may be arbitrarily changed. For example, the shielding part 313 may be configured separately from other parts in the light-receiving side electrode part 31. In this case, for example, after forming the light-receiving side lead part 311 and the light-receiving side connection part 312, the shielding part may be formed at a position separated from these elements.

[0103] Also, for example, the shielding side lead part 314 may be omitted so that the shielding part 313 is not electrically connected to the circuit board 16. Also, for example, the shielding side connection part 315 may be omitted. Also, for example, a shielding part that functions as an electromagnetic shield for the light-emitting part 17 may be provided.

[0104] In the above-described embodiment, as shown in FIG. 20, the light-emitting side lead portion 211, the light-receiving side lead portion 311, and the shield side lead portion 314 are electrically connected to an electric circuit (including a wiring pattern) or a ground pattern on the back side (the lower side in the drawing of FIG. 20) of the circuit board 16 in a state of being inserted into the insertion holes of the circuit board 16. However, the present invention is not limited to this. For example, after forming an electric circuit (including a wiring pattern) or a ground pattern on the front side (the upper side in the drawing of FIG. 20) of the circuit board 16, the light-emitting side lead portion 211, the light-receiving side lead portion 311, and the shield side lead portion 314 may be configured to be electrically connected to the electric circuit or the like. Specifically, for example, by bending the tip sides of the light-emitting side lead portion 211, the light-receiving side lead portion 311, and the shield side lead portion 314 shown in FIG. 7(a) to be parallel to the holding member 4, the light-emitting side lead portion 211 and the light-receiving side lead portion 311 are arranged along the back surface (-Z direction surface) of the holding member 4, and then are configured to be electrically connected to the electric circuit or the like provided on the front side of the circuit board 16 using solder or the like. When configured in this way, it becomes possible to surface-mount the element mounting portion 15 on the circuit board 16, so that the insertion holes for inserting the above-described respective lead portions become unnecessary.

[0105] Note that the direction of bending each lead portion here is arbitrary. For example, the tip side of the light-emitting side lead portion 211 in FIG. 6 may be bent toward the light-emitting side holding portion 22 side (that is, the right side in the drawing of FIG. 6), and the tip side of the light-receiving side lead portion 311 in FIG. 6 may be bent toward the light-receiving side holding portion 32 side (that is, the left side in the drawing of FIG. 6). When bending in this way, at the ends of the light-emitting side lead opening 41 and the light-receiving side lead opening 42, each lead portion can be abutted against a part of the holding member 4 and bent starting from the abutted part of the holding member 4, so that the workability can be improved.

[0106] (Regarding the number of the light-emitting side electrode portion and the light-receiving side electrode portion) In the above-described embodiment, the case where one light-emitting side electrode portion 21 and one light-receiving side electrode portion 31 are provided for each element mounting portion 15 has been described, but the present invention is not limited thereto. For example, one or both of the light-emitting side electrode portion 21 and the light-receiving side electrode portion 31 may be provided in plural numbers.

[0107] For example, when two light-emitting side electrode portions 21 are provided and one light-receiving side electrode portion 31 is provided, two light-emitting portions 17 and one light-receiving portion 18 can be provided for one sensor 100. In this case, the difference in wavelength and the scattering angle distribution can be combined and utilized. For example, one light-emitting portion 17 that emits near-infrared or red light is arranged on the forward scattering side (that is, so that the light-receiving portion 18 receives the forward scattered light thereof), and the other light-emitting portion 17 that emits blue light is arranged on the backward scattering side, and the two scattered lights received by the light-receiving portion 18 may be compared.

[0108] Further, for example, when one light-emitting side electrode portion 21 is provided and two light-receiving side electrode portions 31 are provided, one light-emitting portion 17 and two light-receiving portions 18 can be provided for one sensor 100. In this case, the scattering angle distribution can be utilized. For example, the forward scattered light of the light-emitting portion 17 that emits near-infrared light is received by one light-receiving portion 18, and the backward scattered light of the light-emitting portion 17 is received by the other light-receiving portion 18, and the received forward scattered light and backward scattered light may be compared.

[0109] And when configured as described above, for example, a plurality of light-emitting portions 17 or light-receiving portions 18 can be provided for one sensor 100, so that the performance of the sensor 10 can be improved. That is, for example, it becomes possible to mutually distinguish white smoke and black smoke in the smoke of a fire (that is, to distinguish the type of fire (combustion source)), or to distinguish the smoke of a fire from others (for example, dust, steam, oil fumes associated with cooking, etc.).

[0110] Note that by providing one or both of the light-emitting side electrode portion 21 and the light-receiving side electrode portion 31 in plural numbers of three or more, one or both of the light-emitting portion 17 and the light-receiving portion 18 may be provided in plural numbers of three or more for one sensor 100.

[0111] (Regarding features) Moreover, the configurations of the above embodiments and the features of the modification examples may be arbitrarily combined.

[0112] (Supplementary Note) The element mounting means of Supplementary Note 1 is an element mounting means for mounting a light emitting element and a light receiving element of a smoke detector that receives scattered light scattered by smoke from the light emitting element with the light receiving element to detect the smoke, and includes a conductive light emitting element side electrode means for mounting while electrically connecting the light emitting element, and a conductive light receiving element side electrode means for mounting while electrically connecting the light receiving element, and the light emitting element side electrode means and the light receiving element side electrode means are integrally formed on a common frame body.

[0113] The element mounting means of Supplementary Note 2 is the element mounting means described in Supplementary Note 1, wherein the light emitting element side electrode means and the light receiving element side electrode means are arranged corresponding to a first element angle that constitutes a scattering angle indicated by an intersection angle between the light emitting axis of the light emitting element and the light receiving axis of the light receiving element.

[0114] The element mounting means of Supplementary Note 3 is the element mounting means described in Supplementary Note 1 or 2, wherein shield means that functions as an electromagnetic shield for the light receiving element is integrally formed on a common frame body with the light emitting element side electrode means and the light receiving element side electrode means.

[0115] The element mounting means of Supplementary Note 4 is the element mounting means described in Supplementary Note 3, wherein the shield means is formed by extending from a part of the light receiving element side electrode means.

[0116] The element mounting means of Supplementary Note 5 is the element mounting means described in any one of Supplementary Notes 1 to 4, and further includes an insulating member that holds the light emitting element side electrode means and the light receiving element side electrode means.

[0117] The element mounting means according to Supplementary Note 6 is the element mounting means according to any one of Supplementary Notes 1 to 5, wherein the element mounting means includes a plurality of sets of at least one of the light-emitting element side electrode means and the light-receiving element side electrode means.

[0118] The element mounting means according to Supplementary Note 7 is the element mounting means according to any one of Supplementary Notes 1 to 6, wherein the light-emitting element side electrode means and the light-receiving element side electrode means include lead portions, and the light-emitting element and the light-receiving element of the element mounting means are electrically connected to the electric circuit of the circuit board of the smoke detector via the lead portions.

[0119] The element mounting means according to Supplementary Note 8 is the element mounting means according to any one of Supplementary Notes 1 to 7, wherein shield means functioning as an electromagnetic shield for the light-receiving element is integrally formed on a common frame body together with the light-emitting element side electrode means and the light-receiving element side electrode means, and the shield means is electrically connected to the electric circuit ground of the circuit board of the smoke detector.

[0120] The manufacturing method of the electrode means according to Supplementary Note 9 is a manufacturing method of the electrode means in the element mounting means for mounting a light-emitting element and a light-receiving element of a smoke detector that receives scattered light scattered by smoke from the light-emitting element with the light-receiving element to detect the smoke, and includes a step of integrally forming conductive light-emitting element side electrode means for mounting while electrically connecting the light-emitting element on a common frame body, and a step of integrally forming conductive light-receiving element side electrode means for mounting while electrically connecting the light-receiving element on the common frame body.

[0121] The manufacturing method of the electrode means of Supplementary Note 10 is a manufacturing method of the electrode means in the element mounting means for mounting the light emitting element and the light receiving element of a smoke detector that receives scattered light in which light from the light emitting element is scattered by smoke with the light receiving element to detect the smoke, and includes a step of integrally forming conductive light emitting element side electrode means for mounting while electrically connecting the light emitting element on a common frame body, and a step of integrally forming conductive light receiving element side electrode means for mounting while electrically connecting the light receiving element on the common frame body, and the light emitting element side electrode means and the light receiving element side electrode means are arranged corresponding to a first element angle that constitutes a scattering angle indicated by the intersection angle of the light emitting axis of the light emitting element and the light receiving axis of the light receiving element.

[0122] The manufacturing method of the electrode means of Supplementary Note 11 is a manufacturing method of the electrode means in the element mounting means for mounting the light emitting element and the light receiving element of a smoke detector that receives scattered light in which light from the light emitting element is scattered by smoke with the light receiving element to detect the smoke, the element mounting means includes conductive light emitting element side electrode means for mounting while electrically connecting the light emitting element, and conductive light receiving element side electrode means for mounting while electrically connecting the light receiving element, the light emitting element side electrode means and the light receiving element side electrode means are integrally formed on a common frame body, and the manufacturing method of the electrode means includes a step of integrally forming shielding means that functions as an electromagnetic shield for the light receiving element on the common frame body with the light emitting element side electrode means and the light receiving element side electrode means.

[0123] The manufacturing method of the electrode means of Supplementary Note 12 is the manufacturing method of the electrode means according to any one of Supplementary Notes 9 to 11, and in the common frame body, further includes a step of holding the light emitting element side electrode means and the light receiving element side electrode means with a common insulating member, and a step of separating the light emitting element side electrode means, the light receiving element side electrode means, and the common insulating member from the common frame body.

[0124] The manufacturing method of the electrode means of Supplementary Note 13 is the manufacturing method of the electrode means described in Supplementary Note 12, further including the step of bending the light-emitting element side electrode means or the light-receiving element side electrode means according to the scattering angle indicated by the intersection angle between the light-emitting axis of the light-emitting element and the light-receiving axis of the light-receiving element.

[0125] The manufacturing method of the smoke detector of Supplementary Note 14 is a manufacturing method of a smoke detector that receives scattered light scattered by smoke from a light-emitting element with a light-receiving element to detect the smoke, including a light-emitting element side electrode means and a light-receiving element side electrode means arranged corresponding to a first element angle that constitutes a scattering angle indicated by the intersection angle between the light-emitting axis of the light-emitting element and the light-receiving axis of the light-receiving element, and an element mounting means for electrically connecting and mounting the light-emitting element and the light-receiving element to the light-emitting element side electrode means and the light-receiving element side electrode means integrally held by an insulating member, respectively, and electrically connecting the element mounting means to an electric circuit of a circuit board of the smoke detector through lead portions of each of the light-emitting element side electrode means and the light-receiving element side electrode means.

[0126] (Effect of Supplementary Note) According to the element mounting means described in Supplementary Note 1, by providing the light-emitting element side electrode means and the light-receiving element side electrode means, for example, it becomes possible to easily attach the light-emitting element and the light-receiving element to a smoke detector. Further, since the light-emitting element side electrode means and the light-receiving element side electrode means are integrally formed on a common frame body, for example, it becomes possible to easily form the element mounting means.

[0127] According to the element mounting means described in Supplementary Note 2, since the light-emitting element side electrode means and the light-receiving element side electrode means are arranged corresponding to the first element angle that constitutes the scattering angle, for example, it becomes possible to surely and easily form a scattering angle at an appropriate angle (for example, about 60 degrees to 90 degrees) in a smoke detector.

[0128] According to the element mounting means described in Supplementary Note 3, by integrally forming the shielding means on the frame body, for example, it becomes possible to provide shielding for the light-receiving element in the element mounting means.

[0129] According to the element mounting means described in Supplementary Note 4, the shielding means is formed by extending from a part of the light receiving element side electrode means. For example, the shielding means can be integrally formed in the light receiving element side electrode means, and it becomes possible to easily form the shielding means.

[0130] According to the element mounting means described in Supplementary Note 5, by providing an insulating member that holds the light emitting element side electrode means and the light receiving element side electrode means, for example, the light emitting element side electrode means, the light receiving element side electrode means, and the insulating member can be made into one unit, and it becomes possible to facilitate handling.

[0131] According to the element mounting means described in Supplementary Note 6, by providing at least one of the light emitting element side electrode means and the light receiving element side electrode means in a plurality of sets, for example, a plurality of light emitting elements or light receiving elements can be provided for one smoke detector, so that it becomes possible to improve the performance of the smoke detector. That is, for example, it becomes possible to mutually distinguish white smoke and black smoke in the smoke of a fire (that is, distinguish the type of fire (combustion source)), or to distinguish the smoke of a fire from others (for example, dust, steam, oil smoke associated with cooking, etc.).

[0132] According to the element mounting means described in Supplementary Note 7, the light emitting element and the light receiving element are electrically connected to the electric circuit of the circuit board of the smoke detector via the lead portions of the light emitting element side electrode means and the light receiving element side electrode means. For example, it becomes possible to surely and easily electrically connect the light emitting element and the light receiving element to the electric circuit.

[0133] According to the element mounting means described in Supplementary Note 8, the shielding means is electrically connected to the electric circuit ground (predetermined circuit ground) of the circuit board of the smoke detector. For example, it becomes possible to improve the electromagnetic shielding effect of the shielding means (that is, for example, the effect of preventing the element from being affected by electrical and magnetic external disturbance noises, or the effect of reducing such influence).

[0134] According to the manufacturing method of the electrode means described in Supplementary Note 9, by forming the light-emitting element side electrode means and the light-receiving element side electrode means, for example, it becomes possible to easily attach the light-emitting element and the light-receiving element to a smoke detector. Further, since the light-emitting element side electrode means and the light-receiving element side electrode means are integrally formed on a common frame body, for example, it becomes possible to easily form element mounting means.

[0135] According to the manufacturing method of the electrode means described in Supplementary Note 10, by forming the light-emitting element side electrode means and the light-receiving element side electrode means, for example, it becomes possible to easily attach the light-emitting element and the light-receiving element to a smoke detector. Further, since the light-emitting element side electrode means and the light-receiving element side electrode means are integrally formed on a common frame body, for example, it becomes possible to easily form element mounting means. Further, since the light-emitting element side electrode means and the light-receiving element side electrode means are arranged corresponding to the first element angle constituting the scattering angle, for example, it becomes possible to surely and easily form a scattering angle at an appropriate angle (for example, about 60 degrees to 90 degrees) in a smoke detector.

[0136] According to the manufacturing method of the electrode means described in Supplementary Note 11, by forming shield means that functions as an electromagnetic shield for the light-receiving element, for example, it becomes possible to also provide a shield for the light-receiving element.

[0137] According to the manufacturing method of the electrode means described in Supplementary Note 12, by holding the light-emitting element side electrode means and the light-receiving element side electrode means with a common insulating member and separating the light-emitting element side electrode means, the light-receiving element side electrode means, and the common insulating member from the common frame body, for example, the light-emitting element side electrode means, the light-receiving element side electrode means, and the insulating member can be made into one unit and can be easily separated from the common frame body.

[0138] According to the manufacturing method of the electrode means described in Supplementary Note 13, by bending the light-emitting element side electrode means or the light-receiving element side electrode means according to the scattering angle, for example, it becomes possible to surely and easily form a scattering angle at an appropriate angle (for example, about 60 degrees to 90 degrees) in a smoke detector.

[0139] According to the method for manufacturing a smoke sensor described in Supplementary Note 14, by electrically connecting the light emitting element and the light receiving element to the light emitting element side electrode means and the light receiving element side electrode means integrally held by the insulating member, and mounting the element mounting means, it becomes possible to easily attach the light emitting element and the light receiving element to, for example, the smoke sensor. Further, by electrically connecting through the lead portions of the light emitting element side electrode means and the light receiving element side electrode means respectively, it becomes possible to surely and easily electrically connect the light emitting element and the light receiving element to the electric circuit, for example.

Explanation of Signs

[0140] 2 Light emitting side mounting portion 3 Light receiving side mounting portion 4 Holding member 11 Outer cover 12 Smoke detection part cover 13 Insect net 14 Smoke detection part main body 15 Element mounting portion 16 Circuit board 17 Light emitting part 18 Light receiving part 21 Light emitting side electrode part 22 Light emitting side holding part 31 Light receiving side electrode part 32 Light receiving side holding part 41 Light emitting side lead opening 42 Light receiving side lead opening 43 Holding member side protrusion 100 Sensor 121 Labyrinth 122 Smoke detection space 141 Light emitting element opening 142 Light receiving element opening 211 Light emitting side lead portion 212 Light emitting side connection portion 221 Light emitting side support portion 222 Light emitting side protrusion 223 Light emitting side opening 311 Light receiving side lead portion 312 Light-receiving side connection part 313 Shielding part 314 Shielding side lead part 315 Shielding side connection part 321 Light-receiving side support part 322 Light-receiving side protruding part 323 Light-receiving side opening 400 Lead frame 401 Fixing part 900 Scattering angle 901 First element angle 902 Second element angle P Intersection

Claims

1. A method for manufacturing electrode means in element mounting means for mounting a light-emitting element and a light-receiving element of a smoke detector that detects smoke by receiving scattered light in which light from the light-emitting element is scattered by the smoke with the light-receiving element, comprising: a step of integrally forming on a common frame body electrode means comprising conductive light-emitting element side electrode means for mounting while electrically connecting the light-emitting element, and conductive light-receiving element side electrode means for mounting while electrically connecting the light-receiving element forming a pair with the light-emitting element side electrode means; a step of holding, in the common frame body, the light-emitting element side electrode means and the light-receiving element side electrode means with an insulating member common to the pair; a step of separating from the common frame body the pair of element mounting means holding the light-emitting element side electrode means and the light-receiving element side electrode means in a mutually insulated state with the insulating member common to the pair; A method for manufacturing electrode means including these steps.

2. The light-emitting element side electrode means and the light-receiving element side electrode means are arranged corresponding to a first element angle that constitutes a scattering angle indicated by an intersection angle between the light-emitting axis of the light-emitting element and the light-receiving axis of the light-receiving element. The method for manufacturing electrode means according to Claim 1.

3. A method for manufacturing electrode means according to Claim 1, further comprising a step of integrally forming on the common frame body shield means that functions as an electromagnetic shield for the light-receiving element, with the light-emitting element side electrode means and the light-receiving element side electrode means. The method for manufacturing electrode means according to Claim 1.

4. The method for manufacturing electrode means according to Claim 1, further comprising a step of bending the light-emitting element side electrode means or the light-receiving element side electrode means according to a scattering angle indicated by an intersection angle between the light-emitting axis of the light-emitting element and the light-receiving axis of the light-receiving element. The method for manufacturing electrode means according to Claim 1.

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