JP5807169B2 - lamp - Google Patents

Description

  The present invention relates to a lamp, and more particularly to a structure for reducing assembly defects.

  2. Description of the Related Art Conventionally, a lamp having a light emitting part such as an LED (Light Emitting Diode), and when assembling, a power line for supplying power to the light emitting part is provided between the base and a base attaching part of a housing that houses the light emitting part There has been proposed a bulb-type lamp in which a base is screwed onto a base mounting portion so as to be sandwiched between the bases (see Patent Document 1).

  An example of this type of light bulb shaped lamp is shown in FIGS. 11 (a) and 11 (b). In addition, FIG.11 (b) is the perspective view which expanded the part enclosed with the dashed-dotted line B1 in Fig.11 (a).

  As shown in FIGS. 11A and 11B, the lamp 1000 includes a housing 1010 formed of a metal in a cylindrical shape, and a light emitting unit (on the one end side in the cylinder axis direction of the housing 1010). A power supply circuit 1020 for supplying power to the power supply 1010, a globe 1040 attached to one end of the casing 1010 in the cylinder axis direction so as to cover the light emitting portion, and a power supply disposed inside the casing 1010. A circuit holder 1060 for storing the circuit 1020, and a bottomed portion that is attached to a portion (hereinafter referred to as a “base attachment portion”) 1063 that protrudes from the other end of the housing 1010 to the outside of the housing 1010 in the circuit holder 1060. A cylindrical base 1050 and an insulating member 1052 interposed between the housing 1010 and the base 1050 are provided.

  Here, the base 1050 includes a shell 1050a that forms a side wall, an eyelet 1050c that is disposed at a substantially central portion of the bottom, and an insulator 1050b that is interposed between the shell 1050a and the eyelet 1050c. A screw groove 1051a (see FIG. 12) is spirally provided on the inner peripheral surface of the shell 1050a. On the other hand, a spiral screw thread 1061 that can be screwed into the screw groove 1051a protrudes from the outer peripheral surface 1063a of the base attachment portion 1063. The thread 1061 is provided with two notches 1060a so as to extend along the cylinder axis direction of the base attaching portion 1063. Further, two power supply lines 1023 a and 1023 b for receiving power supply from the base 1050 are led out from the power supply circuit 1020.

  Here, the power supply line 1023 a passes through the inside of the base attachment part 1063, is drawn from the opening 1066 of the base attachment part 1063, is turned back from the opening 1066 to the outer peripheral surface 1063 a side of the base attachment part 1063, and intersects the screw thread 1061. , And is disposed along the outer peripheral surface 1063a of the base attaching portion 1063 so as to pass through the inside of the notch 1060a. The power line is generally a covered electric wire in which a core wire is covered with an insulating material. In the power supply line 1023a, a portion where the insulator is peeled off and the core wire is exposed is disposed along the outer peripheral surface 1063a of the base attachment portion 1063. On the other hand, the power supply line 1023b is soldered to the eyelet portion 1050c.

  Then, by screwing the screw groove 1051a of the shell 1050a with the screw thread 1061 of the base attachment portion 1063 (see arrow AR1 in FIG. 11), the power line 1023a is sandwiched between the base attachment portion 1063 and the base 1050. In this state, the base 1050 is attached to the base attachment portion 1063.

JP 2010-153220 A

  By the way, as shown in FIG. 11B, a notch 1060a is formed in the screw thread 1061, and the power line 1023a is placed in the notch 1060a. On the other hand, as shown in FIG. 12, the power line 1023a has a height R from the deepest part 1061c of the notch 1060a to the central axis of the power line 1023a, from the deepest part 1061c of the notch 1060a to the top 1061b of the screw thread 1061. And a part of the power line 1023a protrudes from the top portion 1061b of the screw thread 1061. In a state where the base 1050 is screwed to the base attachment portion 1063, the shell 1050a comes into contact with a portion protruding from the top portion 1061b of the screw thread 1061 in the extending direction of the power supply line 1023a (see region P1 in FIG. 12). . For this reason, when the base 1050 is tightened, the shell 1050a moves in the direction of the arrow A1 in FIG. As a result, the shell 1050a is pressed against the power supply line 1023a, and the mechanical and electrical connection between the shell 1050a and the power supply line 1023a is established.

  However, in the lamp 1000, when the base 1050 is tightened, the shell 1050a is in sliding contact with the power supply line 1023a, and a force is applied to the power supply line 1023a in the extending direction of the screw thread 1061 (arrow AR2 in FIG. 13A). reference). Then, as illustrated in FIG. 13B, the power line 1023 a rides on the top portion 1061 b of the screw thread 1061. If the base 1050 is tightened in this state, the base 1050 is distorted and deformed. As described above, when the base 1050 is deformed, the base 1050 is difficult to fit into a socket such as a lighting fixture.

  The present invention has been made in view of the above problems, and it is an object of the present invention to provide a lamp capable of preventing the deformation of the base during the lamp assembly process.

  In order to achieve the above object, a lamp according to the present invention is formed in a light emitting part, a power supply line constituting a power supply path to the light emitting part, a bottomed cylindrical shape, and a screw groove on an inner peripheral surface. The base has a base for attaching the base, and a housing for housing the light emitting part. The base has a cylindrical shape and a screw thread that can be screwed into the screw groove on the outer peripheral surface. A plurality of notches are formed on the screw thread so as to be arranged in the cylinder axis direction, and the power line is folded from the opening end of the base attachment part to the outer peripheral surface side through the inside of the base attachment part, It is arranged in a state passing through the inside of each notch, and is sandwiched between the base mounting part and the base in that state, and the central axis of the power line existing in the notch is lower than the top of the screw thread In position.

  According to this configuration, when the base is screwed to the base mounting portion, the power line is folded back to the outer peripheral surface of the base mounting portion and is arranged in a state passing through the inside of each notch, and between the base mounting portion and the base. Sandwiched between. Then, with the power supply line disposed inside the notch, the center axis of the power supply line is lower in the height direction of the screw thread than the top of the screw thread, so that the base is attached. Even when a force is applied to the power supply line in the direction along the screw thread, the power line can be prevented from climbing onto the screw thread during the lamp assembly process. It is possible to prevent deformation of the base by tightening and tightening the base in a state of riding on the top of the base.

The lamp which concerns on embodiment is shown, (a) is a disassembled perspective view, (b) is an enlarged view of the principal part enclosed by the dashed-dotted line B1 in (a). Sectional drawing of the lamp which concerns on embodiment The lamp which concerns on embodiment is shown, (a) is principal part sectional drawing, (b) is the figure which expanded the part enclosed with the dashed-dotted line B2 in (a), (c) is the direction which looked at (b). Is a cross-sectional view seen from the orthogonal direction It is a figure for demonstrating the principal part of the lamp | ramp which concerns on embodiment, (a) is principal part sectional drawing of the lamp | ramp which concerns on embodiment, (b) is principal part sectional drawing of the lamp | ramp which concerns on a comparative example. The lamp | ramp which concerns on a modification is shown, (a) is principal part sectional drawing, (b) is sectional drawing seen from the direction orthogonal to the direction which looked at (a). The lamp | ramp which concerns on a modification is shown, (a) is principal part sectional drawing, (b) is sectional drawing seen from the direction orthogonal to the direction which looked at (a). The lamp | ramp which concerns on a modification is shown, (a) is principal part sectional drawing, (b) is sectional drawing seen from the direction orthogonal to the direction which looked at (a). The lamp | ramp which concerns on a modification is shown, (a) is principal part sectional drawing, (b) is sectional drawing seen from the direction orthogonal to the direction which looked at (a). The lamp | ramp which concerns on a modification is shown, (a) is principal part sectional drawing, (b) is sectional drawing seen from the direction orthogonal to the direction which looked at (a). The lamp | ramp which concerns on a modification is shown, (a) is principal part sectional drawing, (b) is sectional drawing seen from the direction orthogonal to the direction which looked at (a). The lamp which concerns on a prior art example is shown, (a) is a disassembled perspective view, (b) is an enlarged view of the principal part enclosed by the dashed-dotted line B1 in (a). The lamp which concerns on a prior art example is shown, (a) is principal part sectional drawing, (b) is the figure which expanded the part enclosed by the dashed-dotted line B2 in (a). The lamp which concerns on a prior art example is shown, (a) is a perspective view, (b) is principal part sectional drawing.

<Embodiment>
<Structure>
Hereinafter, the structure of the lamp 1 according to the present embodiment will be described.

  FIG. 1A is an exploded perspective view of the lamp 1, and FIG. 1B is an enlarged view of a main part surrounded by a one-dot chain line B1 in FIG. FIG. 2 is a sectional view of the lamp 1. In FIG. 2, the alternate long and short dash line drawn along the vertical direction of the paper indicates the lamp axis J of the lamp, and the upper side of the paper is the front of the lamp 1 and the lower side of the paper is the rear of the lamp 1. Further, in this specification, “plan view” means a case where the rear direction of the lamp 1 is viewed from the front of the lamp 1.

  As shown in FIGS. 1A and 2, the lamp 1 includes a casing 10 formed in a cylindrical shape, a base 12 disposed in a front side end portion 10 a of the casing 10, and a base 12. The light emitting module 14 arranged above, the first reflecting member 16 placed on the module substrate 14a constituting a part of the light emitting module 14, and the second reflecting member 18 arranged inside the reflecting member 16 A power supply circuit 20 that is disposed inside the housing 10 and supplies power to the light emitting module 14, a globe 40 attached to the front end 10a of the housing 10 so as to cover the light emitting module 14, and a power supply circuit 20 Power supply lines 23a and 23b derived from the circuit board 60, the circuit holder 60 in which the power supply circuit 20 is housed, and a portion of the circuit holder 60 that protrudes from the rear side of the housing 10 to the outside of the housing 10 (hereinafter referred to as “base attachment portion”). Attached to 63) And a bottomed cylindrical ferrule 50 that. Here, the housing 10, the globe 40, and the circuit holder 60 constitute a housing that houses the light emitting module 14 therein.

<Case>
The housing 10 is formed in a cylindrical shape from a metal such as aluminum, and has a cylindrical shape that is open at both ends and reduced in diameter from the front to the rear. Further, the base 12 and the opening end 41 of the globe 40 are accommodated in the front end 10 a of the housing 10. In addition, the housing | casing 10 is not restricted to what is formed from a metal, You may be formed from conductive resin etc.

<Base>
The base 12 has a disk shape in which a through hole 12a having a circular shape in a plan view is provided in a substantially central portion. The base 12 is arranged in such a posture that the axis of the through hole 12a coincides with the lamp axis J. Therefore, both the front surface and the rear surface orthogonal to the lamp axis J in the base 12 have a substantially annular shape. The outer peripheral side surface 12 b of the base 12 is tapered in accordance with the shape of the inner peripheral surface 10 b of the housing 10, and is in surface contact with the inner peripheral surface 10 b of the housing 10. The light emitting module 14, the first reflecting member 16, and the second reflecting member 18 are disposed on the front side of the base 12. The light emitting module 14, the first reflecting member 16, and the second reflecting member 18 are fastened and fixed to the base 12 with screws or the like, for example. The base 12 is made of a metal such as aluminum. In addition, the base 12 is not restricted to what is formed from a metal, You may be formed from a heat conductive resin etc.

<Light emitting module>
The light emitting module 14 includes a module substrate 14a and a plurality of light emitting units 14b disposed on the module substrate 14a. The light emitting portion 14b is formed by sealing a semiconductor light emitting element with a sealing body. Here, the semiconductor light emitting element is an LED that emits blue light, and the sealing body is made of silicone resin mixed with phosphor particles that convert the wavelength of blue light into yellow light. Then, part of the blue light emitted from the semiconductor light emitting element is wavelength-converted into yellow light by the sealing body, and white light generated by the color mixture of the unconverted blue light and the converted yellow light is emitted from the light emitting unit 13. It is emitted from. In addition, the light emission part 14b may use the EL element (electric luminescence element), for example.

  The module substrate 14a is formed in a substantially annular shape, and has a tongue piece portion 14c extending inward from one place on the inner peripheral edge. The tongue piece portion 14c is provided with a power supply terminal 14d for supplying power supplied from the power supply circuit 20 to the light emitting portion 14b.

<First reflective member>
The first reflecting member 16 includes a substantially cylindrical main body portion 16a that is open at both sides, and a substantially annular mounting portion 16b that is provided at the rear opening end of the main body portion 16a. Here, the main body portion 16a has a substantially cylindrical shape with a larger outer diameter on the front side than on the rear side, and the cylinder axis thereof coincides with the lamp axis J. The outer peripheral surface of the main body portion 16a has a substantially annular shape when viewed from the rear side along the lamp axis J, and is provided on the front side of the plurality of light emitting portions 14b arranged in a ring shape on the module substrate 14a. It covers a part. Moreover, the 2nd reflection member 18 is arrange | positioned inside the attaching part 16b. The first reflecting member 16 is made of a resin such as polycarbonate. The first reflecting member 16 may be made of metal or the like.

<Second reflecting member>
The second reflecting member 18 includes a substantially cylindrical main body 18a and a bottomed cylindrical lid 18b that closes the front opening of the main body 18a. The main body portion 18a is formed with a flange portion 18c that extends in the direction orthogonal to the lamp axis J direction on the front side of the outer peripheral surface over the entire circumference. Thereby, the main body 18a can reflect the light emitted from the light emitting part 14b in the direction perpendicular to the lamp axis J on the outer peripheral surface.

<Power supply circuit>
The power supply circuit 20 is for supplying electric power to the light emitting module 14, and includes a circuit board 20a and various electronic components 20b mounted on the circuit board 20a. The power supply circuit 20 is accommodated in the circuit holder 60 and is fixed to the circuit holder 60 by screwing, bonding, engagement, or the like.

  Further, power supply lines 23 a and 23 b for receiving power supply from the base 50 are led out from the power supply circuit 20. The power supply lines 23a and 23b and the twisted pair wiring 24 are formed of a covered electric wire in which a metal core wire is covered with an insulating material, and are formed in a circular cross section. Further, a twisted pair wiring 24 for supplying power to the light emitting module 14 is led out from the power supply circuit 20. The twisted pair wiring 24 is inserted into the through hole 12a of the base 12 and connected to the power supply terminal 14d of the module substrate 14a.

<Glove>
The globe 40 has a shape simulating a bulb of an A-shaped bulb that is a general bulb shape, and the light emitting module 14 is formed by press-fitting the opening-side end 41 of the globe 40 into the front-side end 10 a of the housing 10. It is being fixed to the housing | casing 10 in the state which covered the front. The shape of the globe 40 is not limited to a shape imitating a bulb of an A-shaped bulb, and may be any shape. Further, the lamp 1 may be configured without a globe. The globe 40 may be fixed to the housing 10 with an adhesive or the like.

  The inner surface of the globe 40 is subjected to a diffusion process (for example, a diffusion process using silica, a white pigment, or the like) that diffuses light emitted from the light emitting module. The light that has entered the inner surface 42 of the globe 40 passes through the globe 40 and is extracted outside the globe 40.

<Base>
The base 50 is a member for receiving electric power from the socket of the lighting fixture when the lamp 1 is attached to the lighting fixture and turned on. The type of the base 50 is an E26 base that is an Edison type. The base 50 includes a substantially cylindrical shell 50a, an eyelet 50c disposed at a substantially central portion of the bottom, and an insulator portion 50b interposed between the shell 50a and the eyelet 50c.

  Here, the power supply line 23a is electrically connected to the shell 50a in a state where the portion where the insulator is peeled and the internal core wire is exposed is in contact with the shell 50a. Details of the structure for electrically connecting the power supply line 23a to the shell 50a will be described later. The power supply line 23b is electrically connected to the eyelet 50c by soldering.

  FIG. 3A shows a cross-sectional view of the base 50. As shown in FIG. 3A, a screw groove 51 a is provided on the inner peripheral surface of the shell 50 a of the base 50. Further, the outer peripheral surface of the shell 50a is provided with a male screw portion in which a portion corresponding to the screw groove 51a becomes a screw thread.

  Further, an insulator 52 is interposed between the base 50 and the housing 10 in a state of being fitted to the base attachment part 63. The insulating member 52 is formed in an annular shape from an insulating material such as synthetic resin.

<Circuit holder>
The circuit holder 60 has a substantially cylindrical shape opened on both sides. The circuit holder 60 is connected to the main body 65 located inside the housing 10, the lid 67 covering the front opening of the main body 65, and the rear end of the main body 65, and is connected to the rear side of the housing 10. It is comprised from the nozzle | cap | die attaching part 63 which protrudes outside. The circuit holder 60 is made of an insulating material such as synthetic resin.

  Here, a through hole 67 a penetrating in the thickness direction is provided at a substantially central portion of the lid portion 67, and the twisted pair wiring 24 led out from the power supply circuit 20 is inserted therethrough. The twisted pair wiring 24 is further inserted into the through hole 12a of the base 12 and connected to a power supply terminal 14d provided on the module substrate 14a.

  Most of the power supply circuit 20 is accommodated in the main body 65. On the other hand, the base attaching part 63 located on the rear side of the main body part 65 is closed with the opening 66 on the rear side by fitting the base 50 to the outside. A part of the power supply circuit 20 is accommodated inside the base attachment portion 63.

  The base attaching portion 63 is provided with a screw thread 61 that can be screwed into the screw groove 51 a of the base 50. Then, by screwing the screw groove 51a on the inner peripheral surface of the shell 50a of the base 50 with the screw thread 61 of the base attachment part 63 (see arrow AR1 in FIG. 1A), the base 50 is attached to the base attachment part 63. Attached to.

  Further, as shown in FIG. 1B, two notches 60 a are provided along the tube axis direction of the base attaching portion 63 in the screw thread 61.

  Here, FIG. 3B shows an enlarged view of the region surrounded by the alternate long and short dash line B2 in FIG. 3A, and FIG. 3C shows a direction orthogonal to the direction of viewing the cross section of FIG. Sectional drawing at the time of seeing from is shown.

  As shown in FIG. 3C, the notch 60a has a width dimension WD in the extending direction of the screw thread 61 larger than the outer dimension of the power supply line 23a.

  Here, the power supply line 23 a passes through the inside of the base attachment part 63 and is drawn from the opening 66 of the base attachment part 63, and is turned back from the opening 66 toward the outer peripheral surface 63 a of the base attachment part 63, and intersects the screw thread 61. And it arrange | positions along the outer peripheral surface 63a of the nozzle | cap | die attachment part 63 in the form which passes the inner side of the notch part 60a. When the base 50 is screwed to the base attachment portion 63, the power line 23 a is sandwiched between the base attachment portion 63 and the base 50. Here, the part sandwiched between the base attaching part 63 and the base 50 in the power supply line 23a is a part where the insulating material is peeled and the outer surface of the core wire is exposed.

  In addition, a part of the rear end 63c of the base attachment part 63 includes a slit 63b1 having a width substantially the same as the outer diameter of the power supply line 23a and a slit 63b1 that is continuous with the slit 63b1 and is located behind the slit 63b1. A guide portion 63b2 for guiding the wire 23a into the slit 63b1 is formed.

  Here, as shown in FIGS. 3B and 3C, the central axis of the power supply line 23 a is lower than the top 61 b of the screw thread 61 in the height direction A <b> 2 of the screw thread 61. . In other words, the height R (the radius of the power supply line 23a) from the deepest part 61c of the notch 60a to the central axis of the power supply line 23a is greater than the height T from the deepest part 61c of the notch 60a to the top of the screw thread 61. The power supply line 23 a does not protrude outward from the top 61 b of the screw thread 61. In the state where the base 50 is screwed to the base attachment portion 63, the inner peripheral surface of the shell 50a is a region between two screw threads 61 adjacent to each other in the cylinder axis direction of the base attachment portion 63 (region in FIG. 3). (Refer to P2) and abut against the power supply line 23a. Here, when the base 50 is tightened, the shell 50a moves in the direction of arrow A1 in FIG. Thus, the shell 50a and the power supply line 23a are electrically connected in a state where the shell 50a is in pressure contact with the power supply line 23a.

  By the way, in the lamp 1, when the base 50 is tightened, the shell 50a is slidably contacted with the power line 23a, and a force is applied to the power line 23a in the extending direction of the screw thread 61. On the other hand, in the lamp 1, the central axis of the power supply line 23a is lower than the top 61b of the screw thread 61 in the height direction A2 of the screw thread 61. Therefore, the power supply line 23a is connected to the screw thread 61. Therefore, movement in the circumferential direction is restricted. As a result, the power supply line 23a can be prevented from riding on the screw thread 61, and the base 50 is tightened with the power supply line 23a sandwiched between the insulating member 52 and the upper edge of the shell 50a. Thus, the base 50 can be prevented from being deformed.

  Further, as shown in FIG. 3, in the lamp 1, in the outer peripheral surface of the base attaching part 63, the skirt part (the outer peripheral face of the base attaching part 63) 63a of the screw thread 61 and the deepest part 61c of the notch part 60a are the screw. It corresponds in the height direction of the mountain 61. That is, the part where the power supply line 23a is placed is flat. Accordingly, the contact area between the outer peripheral surface 63a of the base attachment portion 62 and the power supply line 23a can be increased compared to the lamp 1000 (see FIGS. 11 to 13), and therefore, the power supply line 23a can be compared to the lamp 1000. On the other hand, the frictional force against the force applied in the extending direction of the screw thread 61 increases. Therefore, the movement of the power supply line 23a in the extending direction of the screw thread 61 can be strongly restricted.

  Furthermore, as shown in FIG. 3, in the lamp 1, both side surfaces 61 a in the direction along the thread 61 of the notch 60 a are orthogonal to the outer peripheral surface 63 a of the base attachment portion 63.

  FIG. 4A shows an enlarged view of the notch 60a portion of the lamp 1 according to the present embodiment, and FIG. 4B shows an enlarged view of the notch 560a portion of the lamp according to the comparative example. Here, as shown in FIG. 4A, in the case of the lamp 1, both side surfaces 61 a in the direction along the thread 61 of the notch 60 a are orthogonal to the outer peripheral surface 63 a of the base mounting portion 63. That is, the inclination angle θ1 of the side surface 61a with respect to the outer peripheral surface 63a is approximately 90 °. Therefore, even if a predetermined amount of force PW1 is applied to the power supply line 23a in the extension direction of the screw thread 61, the force component applied to the power supply line 23a in the height direction of the screw thread 61 is substantially zero. It has become. On the other hand, as shown in FIG. 4B, in the case of the lamp according to the comparative example, both side surfaces 561a in the direction along the thread 561 of the notch portion 560a are inclined with respect to the outer peripheral surface 563a of the base mounting portion 563. Yes. That is, the inclination angle θ2 of the side surface 561a with respect to the outer peripheral surface 563a is 90 ° or less. Accordingly, when a force PW1 having a predetermined magnitude is applied to the power supply line 23a in the extending direction of the screw thread 61, a force component PW2 applied to the power supply line 23a in the height direction of the screw thread 61 is generated. The power supply line 23a moves upward along the side surface 561a.

  As described above, when the force PW1 is applied to the power supply line 23a in the extension direction of the screw thread 61, the notch 560a in the direction along the screw thread 561 as in the comparative example shown in FIG. 4B. The force PW2 applied in the height direction of the screw thread 61 is extremely small (substantially 0) as compared to the configuration in which both side surfaces 561a are tapered with respect to the outer peripheral surface 563a of the base mounting portion 563. Accordingly, it is difficult for the power line 23a to ride on the screw thread 61.

  Incidentally, as described above, in the lamp 1, the slit 63b1 and the guide portion 63b2 continuous with the slit 63b1 are formed in a part of the rear side end portion 63c of the base attachment portion 63. Thereby, since the power supply line 23a is fixed to the front end of the slit 63b1, it is not necessary for the operator to press the power supply line 23a against the outer peripheral surface 63a of the base attachment part 63 in the assembly process of the lamp 1. The efficiency of the assembly work of the lamp 1 can be improved. Further, by fixing the power supply line 63a to the front end of the slit 63b1, it is possible to prevent the position of the power supply line 23a from moving when the base 50 is screwed to the base attachment part 63. Further, since the guide 63b2 continuous to the slit 63b1 is provided, the work of fitting the power supply line 23a into the slit 63b1 is facilitated, so that the efficiency of the assembly work of the lamp 1 can be improved.

<Modification>
(1) In the embodiment, the example in which the plurality of notches 60a are provided in the screw thread 61 has been described, but the present invention is not limited to this. For example, as shown in FIG. 5, a groove 64 may be formed on the outer peripheral surface of the base attachment portion 63 so as to pass through the bottom of the notch 60 a. In this case, even if the radius of the power line 23 a having a circular cross section is larger than the height of the thread 61, the height T 1 from the bottom of the groove 64 to the top 61 b of the thread 61 is set to the height of the power line 23 from the bottom of the groove 64. It can be made higher than the height R to the central axis. Accordingly, the central axis of the power supply line 23 a is lower than the top 61 b of the screw thread 61 in the height direction A <b> 2 of the screw thread 61, so that the power line 23 a is extended from the screw thread 61 by the screw thread 61. The movement in the direction is restricted, and it is possible to further suppress the power line 23a from climbing onto the screw thread 61.

  (2) In the modification described in (1), the example in which the groove 64 is formed in a rectangular cross section has been described. However, the present invention is not limited to this. For example, as shown in FIG. 6, the groove 264 may be formed in a triangular cross section. Here, the height T2 from the deepest portion 264c of the groove 264 to the top portion 61b of the screw thread 61 is higher than the height R2 from the deepest portion 264c of the groove 264 to the central axis of the power supply line 23. Accordingly, the central axis of the power supply line 23 a is lower than the top 61 b of the screw thread 61 in the height direction A <b> 2 of the screw thread 61, so that the power line 23 a is extended from the screw thread 61 by the screw thread 61. Movement in the direction is restricted.

  Further, since the groove 264 is formed in a triangular shape in cross section, the power supply line 23a is guided to a substantially central portion of the groove 264. Therefore, as compared with the configuration in which the bottom of the groove 64 is flat (see FIG. 5), the power supply line 23a is less likely to move in the groove 264, so that it is possible to prevent the power supply line 23a from being twisted.

  Further, as shown in FIG. 7, the groove 364 may be formed in a wedge shape in cross section. Here, the height T3 from the deepest part 364c of the groove 364 to the top part 61b of the screw thread 61 is higher than the height R3 from the deepest part 364c of the groove 364 to the central axis of the power supply line 23a.

  (3) In the embodiment, the example in which the notch 60a is formed in a rectangular cross section has been described, but the present invention is not limited to this. For example, as shown in FIG. 8, you may have an inclined surface in the bottom part of the notch part 260a. In this case, the power line 23a is guided to the substantially central portion of the notch 260a along the inclined surface of the notch 260a. Accordingly, the power supply line 23a is less likely to move in the cutout portion 260a as compared with the configuration in which the bottom portion of the cutout portion 60a (the deepest portion 61c of the cutout portion 60a) is flat (see FIG. 3). Can be suppressed. Here, the height T4 from the deepest part 261c of the notch 260a to the top 61b of the screw thread 61 is higher than the height R4 from the deepest part 261c of the notch 260a to the central axis of the power supply line 23a.

  (4) In the embodiment, the skirt part (the outer peripheral surface of the base attachment part 63) 63a and the deepest part 61c of the notch part 60a on the outer peripheral surface of the base attachment part 63 are the height of the screw thread 61. Although an example in which the directions match (that is, the portion on which the power supply line 23a is placed is flat) has been described, the present invention is not limited to this. For example, as shown in FIG. 9, a protrusion 65 may be provided at a portion other than the notch 60 a in the skirt (the outer peripheral surface of the base attaching portion 63) 63 a of the screw thread 61. In this case, the inner peripheral surface of the shell 50 a is connected to the power supply line 23 a in the region between the two screw threads 61 adjacent to each other in the cylinder axis direction of the base attachment portion 63 with the base 50 screwed to the base attachment portion 63. Since it becomes easy to contact | abut, generation | occurrence | production of the contact failure of the nozzle | cap | die 50 and the power wire 23a can be suppressed.

  (5) In the embodiment, the example in which the thickness of the shell 50a of the base 50 is uniform has been described. However, the present invention is not limited to this. For example, as shown in FIG. 10, the portion 50a2 that contacts the power line 23a may be thicker than the bottom 50a1 of the screw groove 51a. In this case, in a state where the base 50 is screwed to the base mounting portion 63, a region between two screw grooves 51a adjacent to each other in the cylinder axis direction of the base 50 on the inner peripheral surface of the shell 50a (see region P3 in FIG. 10). ) Can easily come into contact with the power supply line 23a, so that the occurrence of poor contact between the base 50 and the power supply line 23a can be suppressed.

  (6) In the embodiment, the description has been given of the example in which the notch portion 60a has both side surfaces 61a in the direction along the screw thread 61 perpendicular to the outer peripheral surface 63a of the base attachment portion 63, but the present invention is not limited thereto. is not. The inclination angle of the side surface 61a with respect to the outer peripheral surface 63a is such that the power line 23a does not run on the thread 61 even when a force is applied to the power line 23a in the extending direction of the thread 61 when the base 50 is tightened. It may be designed at an angle.

  (7) In the embodiment, the example in which the two notches 60a are provided in the screw thread 61 along the cylinder axis direction of the base attaching portion 63 has been described, but the present invention is not limited to this. For example, the two notches 60 a may be offset from each other in the circumferential direction of the base attachment portion 63.

  (8) In the embodiment, the example in which the lamp 1 is a so-called LED lamp using an LED has been described. However, the present invention is not limited to this, and other lamps such as a fluorescent lamp and an electrodeless discharge lamp may be used. There may be.

  (9) In the embodiment, an example in which the housing is configured by the housing 10, the globe 40, and the circuit holder 60 has been described. However, any other configuration can be used as long as the light emitting module 14 can be accommodated and the base mounting portion is included. It may be a configuration. For example, there may be a configuration in which the housing 10 is not provided and the circuit holder 60 is exposed to the outside. Alternatively, the housing 10, the base 20, and the circuit holder 60 have a structure that is integrally molded with a heat conductive resin or the like, and the housing is constituted by the structure and the globe 40. Also good.

  (10) In the embodiment, the example in which the housing has a light bulb shape has been described. However, the present invention is not limited to this. For example, it may be similar to a spotlight such as a halogen lamp with a reflecting mirror or a lamp for downlight use.

DESCRIPTION OF SYMBOLS 1 Lamp 10 Case 12 Base 14 Light emission module 14b Light emission part 16 1st reflection member 18 2nd reflection member 20 Power supply circuit 23a, 23b Power supply line 24 Twisted pair wiring 40 Globe 50 Base 50a Shell 50b Insulator part 50c Eyelet 51a Screw groove 52 Insulating member 60 Circuit holder 60a Notch 61 Thread 61a Side 61b Top 61c Deepest 63a Bottom (outer peripheral surface)
66 opening

Claims (5)

A light emitting unit;
A power line constituting a power supply path to the light emitting unit;
A base formed in a bottomed cylindrical shape and provided with a screw groove on the inner peripheral surface;
A base mounting portion to which the base is mounted, and a housing that houses the light emitting portion therein;
The base mounting portion has a cylindrical shape, and a screw thread that can be screwed into the screw groove protrudes from the outer peripheral surface.
In the screw thread, a plurality of notches are formed in a shape aligned in the cylinder axis direction,
The power line is a covered electric wire in which a metal core wire is covered with an insulating material, passes through the inside of the base attachment part, is folded back from the opening end of the base attachment part to the outer peripheral surface side, It is arranged in a state passing through, and is sandwiched between the base mounting part and the base in that state,
In the power supply line, at least a portion sandwiched between the base attaching portion and the base has the insulating material peeled off and the outer surface of the core wire is exposed,
Furthermore, the central axis of the power line present in the notch portion, the Ri position near below the top of the screw thread,
The lamp is characterized in that a groove is formed on the outer peripheral surface of the base mounting portion so as to pass through the bottom of each of the plurality of notches . 2. The lamp according to claim 1, wherein the plurality of notches are arranged along a tube axis direction of the base attaching portion. The two side surfaces in a direction along said threads of cutouts The lamp of claim 1, wherein, characterized in that the perpendicular to the outer peripheral surface of the mouthpiece attachment section. The depth of the deepest portion of the groove from the bottom portion of the threads is claim 1, wherein the lamp being less than the maximum value of the outer dimension of the core wire. The groove lamp according to claim 1, wherein a plane that intersects the outer peripheral surface of the mouthpiece attachment section.

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