JP4670801B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting device such as a reading light or a downlight that can freely change the direction of a lamp having a light source and adjust the light irradiation direction.

  Conventionally, a substantially spherical lamp with a built-in light source is placed on the edge of the circular opening of the instrument body, and a pair of fixing parts of the elastic body are fixed to the instrument body, and the holding part of the elastic body is fixed. There has been known a downlight in which a lamp is pressed from above by being brought into contact with the back surface of the lamp to realize attachment of the lamp to an apparatus body and maintenance of the irradiation direction of the lamp. In this downlight, the power line drawn out from the upper member of the lamp is connected to an intermediate position between the engaging spring portion and the fixing portion of the elastic body, or between the pair of fixing portions of the elastic body. Derived from the vicinity of the center to the back side, fixed to the upper surface of the holding part of the elastic body with an attachment, and with the tension stop for the power line, the power line does not interfere with each part of the elastic body when tilting the lamp in the vertical direction (For example, refer to Patent Document 1).

In the downlight described in Patent Document 1, the frictional force between the edge of the circular opening of the instrument body and the lamp pressed against the edge, and the frictional force between the lamp and the pressing portion elastically contacting the lamp are used. The lamp can be held stationary. At the same time, the lighting direction of the light from the lamp can be adjusted by rotating the lamp against the frictional force from the lower side of the circular opening of the fixture body and arbitrarily changing the direction of the lamp.
JP 2005-149790 A (paragraphs 0013-0025, FIGS. 1 to 9)

  In the luminaire of Patent Document 1, since the electric wire part extending from the fixing part to the elastic body of the power line and the connection part where the power line is connected to the lamp is wired downward from the fixing part to the connection part, The length of the electric wire portion has to be shortened, whereby the fixed portion side portion of the electric wire portion is close to and opposed to the edge of the elastic body. Therefore, when the direction of the lamp is adjusted so that the connecting portion is separated from the fixing portion, the wire portion is easily attached to the edge of the elastic body made of a metal leaf spring as the short wire portion is pulled downward. There is a high possibility of interference (contact), and if the contact is strong, the insulation coating of the power supply line may be damaged. Furthermore, when the direction of the lamp is adjusted so that the connection portion approaches the fixing portion, the short electric wire portion is easily prevented from being pushed up with a smooth deformation, so that the electric wire portion is fixed. It becomes a large resistance to the operation of tilting the direction of the lamp so that the connection portion approaches the portion, and the operation tends to be heavy.

  The space for arranging the downlight is determined including the arrangement of the power supply line arranged above the holding portion of the elastic body. However, Patent Document 1 does not describe a suitable arrangement of power supply lines for reducing the arrangement space of the downlight.

  The objective of this invention is providing the lighting fixture which can prevent the damage of an insulation coating electric wire, can lightly adjust the direction of a lamp, and can suppress that an installation space becomes large in these implementation | achievement.

The invention of claim 1 is a lamp with a built-in light source, wherein the front side portion of the lamp has a hemispherical outer surface, and the back side portion of the lamp has a back surface formed of a part of a spherical surface. Said lamp;
The lamp has an opening smaller than the maximum diameter of the arcuate wall and the hemispheric outer surface, and the lamp is turned within a predetermined range so that the irradiation direction by the lamp can be changed by receiving the hemispheric outer surface at the edge of the opening. An instrument body that supports the instrument body; and a pressing portion that has first to third arms attached to the instrument body and is formed in a trifurcated shape and presses the back surface. The pressing portion opens the lamp. A metal leaf spring that presses against the edge of the light source; one end of which is electrically connected to the light source and spans between the side edge of the pressing portion across the first and second arms and the arcuate wall. An insulated coated electric wire drawn out of the instrument body and having an electrical connector attached to the other end; a portion of the electric wire that crosses the third arm is fixed to the third arm, and the fixed portion is Connector-side wire portion over the electrical connector A wire stopper for restricting the device body so as to protrude from the outer surface of the arc-shaped wall when the instrument body is viewed from the back side; A fixing means for restricting the intermediate electric wire portion extending over the electric wire stopper across the arm of the connector together with the electric wire stopper in a drawn state that is inclined to the opposite side to the protruding direction of the connector-side electric wire portion. .

  In the invention of claim 1, it is preferable that the opening of the fixture body supports the hemispherical outer surface of the lamp at the entire periphery thereof, but the edge of the opening forms a part of the opening edge along the circumferential direction. It is also possible to have three or more portions at intervals, preferably at equal intervals, and to support the hemispherical outer surface of the lamp on these support convex portions. In the invention of claim 1, an output convex portion may be provided on the top of the hemispherical outer surface, and the light emitted from the light source may be emitted through the convex portion, or the hemispherical outer surface may be removed by removing the output convex portion. The light emitted from the light source may be emitted through the top of the light source. In the invention of claim 1, a lamp other than the light emitting diode can be used as the light source. In the invention of claim 1, it is preferable to provide the three-pronged arm of the leaf spring every 120 °, but this is not restrictive. In the first aspect of the present invention, the wire stopper may be formed separately from the third arm and attached to the arm, or formed integrally with the third arm and bent. Thus, it may be formed of a bent portion for fixing the insulated wire to the third arm so as not to move. In the invention of claim 1, the fixing means fixes the intermediate electric wire portion of the insulation-coated electric wire so as not to move to the rear side portion of the lamp. For example, the rear side portion other than the embodiment described in the embodiment The intermediate wire portion may be fixed to the back side portion by bending the protrusion.

  In the invention of claim 1, since the intermediate electric wire portion of the insulation coated electric wire is provided across the first arm of the leaf spring across the electric wire stopper and the fixing means, and the length of the intermediate electric wire portion is ensured long. With the turning operation, the intermediate electric wire portion can smoothly deform and follow the movement of the lamp.

  In this lamp turning operation, when the lamp is turned so that the fixing means moves away from the leaf spring, the long intermediate electric wire portion is smoothly deformed so as to approach the back of the first arm, The securing means moves away from the first arm. Thereby, since it is avoided that an intermediate | middle electric wire part contact | connects the side edge over the 1st, 2nd arm of a leaf | plate spring, it is prevented that an intermediate | middle electric wire part rubs against the side edge of a leaf | plate spring.

  Further, in the lamp turning operation, when the lamp is turned so that the fixing means approaches the side edge of the leaf spring, the intermediate wire portion is smoothly deformed so as to move away from the back surface of the first arm. And since this intermediate | middle electric wire site | part will be in the state which is non-contacting or slightly touching the side edge of a leaf | plate spring, it is prevented that it rubs against the side edge of a leaf | plate spring strongly.

  At the same time, as described above, the long intermediate electric wire portion is smoothly deformed so as to move away from the back surface of the first arm, so that the fixing means approaches the leaf spring with respect to the turning operation of the lamp. Since the resistance does not increase greatly, the turning operation of the lamp can be lightened.

  Further, as described above, since the intermediate electric wire portion straddles the first arm of the leaf spring, the intermediate electric wire portion protrudes to some extent in the direction away from the back surface of the leaf spring when the lighting fixture is viewed from the side. It becomes a state. However, since this intermediate electric wire portion is drawn by being twisted by the wire stopper that defines the protruding direction of the connector side electric wire portion relative to the arcuate wall of the instrument body and the fixing means, the protruding portion of the connector side electric wire portion It is held in an inclined state on the opposite side to the direction. Thereby, the intermediate | middle electric wire site | part can make small the protrusion dimension of the direction away from the back surface of a leaf | plate spring. Moreover, since the connector-side electric wire portion protrudes in a direction different from the protruding direction of the intermediate electric wire portion, the space factor in the direction away from the back surface of the leaf spring is not affected. Therefore, a large space is required for arranging the insulated wire in the direction away from the back surface of the leaf spring due to the insulated wire so arranged that the operation of adjusting the direction of the lamp can be lightened and the interference with the leaf spring can be prevented. There is no.

  The invention of claim 2 attaches a contact member made of a material having a lower strength than the back side portion to the pressing portion or the back side portion, and attaches the contact member to the back surface of the back side portion or the central portion of the pressing portion. It is characterized by contact.

  According to the present invention, it is possible to prevent the rear surface of the lamp from being in direct contact with the harder leaf spring in accordance with the turning operation of the lamp. Therefore, in the long-term use, it is possible to suppress a decrease in the performance of holding the lamp in the changed position, and it is possible to maintain the operation force for operating the lamp substantially constant.

  According to the invention of claim 1, damage to the insulated wire due to contact with the leaf spring can be prevented, the resistance of the insulated wire can be reduced, and the adjustment operation of the direction of the lamp can be lightened. It is possible to provide a lighting device that can suppress an increase in the installation space of the entire device, even though the insulated wire protrudes from the back surface of the leaf spring.

  According to the invention of claim 2, in the lighting apparatus of the invention of claim 1, since the wear of the rear side portion of the lamp is prevented, the performance of holding the lamp in the changed position is reduced in long-term use. While being able to suppress, the operation force which operates a lamp can be maintained substantially constant.

  An embodiment of the present invention will be described with reference to FIGS. The lighting fixture of this embodiment is used as a reading lamp 1. That is, for example, seats are arranged side by side along the direction in which the passage extends in at least one side of a passage in a transport body such as a passenger car, an aircraft cabin, a passenger ship, and the like. The reading lamp 1 is installed at one end in the width direction, in other words, at the seat shoulder. In this case, among the pair of seats arranged on the aisle side and the window side, the reading lamp 1 is installed on the aisle seat shoulder for the aisle seat, and on the window side seat shoulder for the window side seat A reading light 1 is installed. When a passenger sitting on a seat reads a book, the reading lamp 1 projects light by spotting light from the passenger's shoulder over his / her shoulder.

  As shown in FIGS. 1 to 10, the reading lamp 1 includes a lamp 11, an insulation-coated electric wire (hereinafter abbreviated as an electric wire) 26, an instrument body 31, an elastic metal leaf spring 41, a stopper 51, and the like. It has.

  The lamp 11 includes a cover 12, a lamp body 15, a light source 20, a lens 22, and the like.

  The cover 12 forms a front side portion of the lamp 11 and is made of a synthetic resin. As shown in FIGS. 3 and 6 and the like, the cover 12 has a hemispherical outer surface 12a and a light emitting convex portion 13 integrally projecting from the top of the hemispherical outer surface 12a, and is formed in a bowl shape. The tip of the output convex portion 13 is open. The end of the cover 12 opposite to the emission convex portion 13 is also open, and the outer diameter of the hemispherical outer surface 12a is maximum at the open end.

  The lamp body 15 forms a rear side portion of the lamp 11, and is a die-cast product of an aluminum alloy that is lighter than metal, preferably iron, and has excellent thermal conductivity. As shown in FIGS. 3, 6 to 8, and the like, the lamp body 15 includes a body base portion 16, a back convex portion 17, and a pair of arc-shaped portions 18.

  The body base portion 16 is a portion disposed inside the cover 12. An end surface that becomes the head when the body base portion 16 is inserted into the cover 12, that is, an end surface 16 a facing the emission convex portion 13 side, is formed as a flat surface.

  The rear convex portion 17 is integrally projected on the rear side of the body base portion 16. Both side surfaces of the back surface convex part 17 are substantially parallel, and the back surface 17a between these both side surfaces is formed of a part of spherical surface. The back surface convex part 17 has a pair of groove | channels 17b. These grooves 17b are formed so as to be shifted from the top of the rear convex portion 17 and open to the rear surface 17a.

  The pair of arcuate portions 18 are provided so that both ends thereof are integrally connected to the side surface of the body base portion 16 so as to project at right angles from the side surface of the body base portion 16. These arc-shaped portions 18 are configured to cover the large-diameter opening ends of the cover 12, and protrusions 18 a are provided on the outer peripheral surface of the central portion of the arc-shaped portion 18. These protrusions 18 a protrude so as to be away from the rear surface protrusion 17. As shown in FIG. 6, the lamp body 15 has concave portions 15 a formed between the arc-shaped portion 18 and the side surface of the body base portion 16.

  As described above, both side surfaces of the rear surface convex portion 17 of the lamp body 15 are substantially parallel to each other, the pair of grooves 17b are provided in the rear surface convex portion 17, and the pair of concave portions 15a is provided in the lamp body 15. This contributes to lightening the lamp body 15 and is consequently preferable in that the reading lamp 1 as a whole can be reduced in weight as well as the lamp 11 which is a part to be rotated. Furthermore, since the surface area of the lamp body 15 is increased by the pair of grooves 17b and the pair of recesses 15a, it is preferable in that the heat dissipation performance from the lamp body 15 can be improved.

  As shown in FIG. 7, the lamp body 15 and the cover 12 are connected to each other by a pair of screws 19 screwed into the cover 12 from the groove 17 b through the body base portion 16.

  As shown in FIGS. 6 and 7, a light source 20 in which an LED (light emitting diode) 20 b that emits white light, for example, is mounted on a substrate 20 a is used. The light source 20 is disposed on the end surface 16 a of the body base portion 16 with the heat conductive sheet 21 interposed therebetween. The lens 22 disposed to cover the light source 20 controls and emits the light emitted from the LED 20 b and is supported in the lens holder 23. The lens holder 23 is formed by combining two holder members. The lens holder 23 is inserted into the output convex portion 13 and disposed inside the cover 12. The lens holder 23 is attached to the lamp body 15 by screws 24 that are respectively inserted from the inside of the pair of recesses 15 a and screwed into the screw wire fixing portion of the lens holder 23 through the body base portion 16.

  By this attachment, the heat conductive sheet 21 and the substrate 20a of the light source 20 that are overlapped with each other are sandwiched between the lens holder 23 and the end surface 16a of the body base portion 16, and the heat conductive sheet 21 becomes the end surface of the body base portion 16. 16a. As a result, the heat generated by the LED 20b as it is turned on can be smoothly transferred to the body base 16 via the thermal conductive sheet 21 and released from the surface of the body base 16, so that the temperature rise of the LED 20b is suppressed. The predetermined luminous performance can be maintained.

  The electric wire 26 is for supplying power to the light source 20. One end of the electric wire 26 passes through the bottom of one recess 15a and is connected to a power supply pattern (not shown) provided on the substrate 20a of the light source 20. As shown in FIGS. 3, 4, 9 and 10, the electric wire 26 has an electrical connector 27 at the other end.

  The instrument body 31 is, for example, an aluminum alloy die-cast product, and is formed by projecting a pair of arc-shaped walls 33 on the back surface of the ring portion 32 as shown in FIGS. 1 to 4, 8 to 10, and the like. Has been. The circular opening 32a of the ring portion 32 has a smaller diameter than the maximum diameter of the hemispherical outer surface 12a, and the edge of the opening 32a contacts the hemispherical outer surface 12a to support the hemispherical outer surface 12a slidably. It is formed with a surface.

  The pair of arcuate walls 33 are provided opposite to each other so as to accommodate the lamp 11 between them, and a gap G (see FIGS. 3 and 8) is provided between the ends of the arcuate wall 33 in the direction in which the arc extends. ) Is formed. The pair of gaps G are separated by approximately 180 ° in the circumferential direction of the instrument body 31. The width of the gap G is wider than the width of the protrusion 18 a of the lamp body 15. The gap G and the protrusion 18 a define an angle at which the lamp 11 can rotate around the central axis of the fixture body 31.

  Each arcuate wall 33 is provided with at least one guide portion 34 and a spring mounting hole 35 located at the end opposite to the ring portion 32. The guide portion 34 is open to the end surface of the opposite end portion, and is inclined so as to protrude from the end surface to the outer surface of the arc-shaped wall 33. The spring mounting hole 35 is formed as a square hole provided adjacent to the guide portion 34 and closer to the ring portion 32.

  On each inner surface of each arc-shaped wall 33, a step portion 36 is formed at an end opposite to the ring portion 32. These step portions 36 are formed to extend along the arc of the arc-shaped wall 33. A concave groove 37 is provided in the middle of the step portion 36 so as to be continuous with the spring mounting hole 35.

  As shown in FIGS. 1, 3, and 4, the leaf spring 41 has the same number of fixing portions 42 as the spring mounting holes 35 formed in the instrument body 31, and a pressing portion 43 that extends between these fixing portions 42. .

  As a preferable example, the fixing portions 42 are arranged at equal intervals, for example, every 120 °, and are formed by bending them into an L shape. The pressing portion 43 has a shape in which the first arm 43b to the third arm 43d protrude radially, in other words, a tridentate shape, and is fixed from the tips of the first arm 43b to the third arm 43d, respectively. The part 42 is bent. The leaf spring 41 is attached to the instrument body 31 by inserting the respective fixing portions 42 into the spring attachment holes 35 from the outside and hooking them.

  Any one of the arms, for example, the third arm 43d has a wire fixing portion 44 that protrudes integrally to the side thereof (see FIGS. 3 and 4). The wire fixing part 44 forms a groove 45 between the side edge of the third arm 43d from which the electric wire fixing part 44 protrudes, and has, for example, a T shape. Furthermore, the contact member 47 is provided in the center part 43a of the pressing part 43, in other words, the part where the first arm 43b to the third arm 43d are combined. Specifically, the contact member 47 is made of a material having a lower strength than the constituent material of the lamp body 15 and preferably having a small friction coefficient, for example, a hard synthetic resin. The contact member 47 is attached by being lightly press-fitted from the lamp body 15 side into a hole 43e (see FIG. 3) opened in the central portion 43a. The contact member 47 has an end that is larger in diameter than the hole 43 e, and this end is in contact with the back surface 17 a of the lamp body 15.

  As shown in FIG. 3 and the like, the stopper 51 is formed of, for example, a metal ring. An anti-rotation projection 52 is integrally projected on a part of the outer periphery of the ring-shaped stopper 51. The width of the rotation preventing projection 52 is formed to be substantially equal to the width of the gap G so as to be fitted into the gap G. An escape groove 53 is provided on the inner periphery of the stopper 51 so as to be adjacent to the rotation preventing projection 52. The escape groove 53 is provided in order to suppress interference with the electric wire 26 drawn out of the instrument body 31. As shown in FIGS. 6 and 7, the stopper 51 is supported by the step portion 36 and disposed inside the instrument body 31.

  Next, a procedure for assembling the reading lamp 1 by preparing the appliance main body 31, the leaf spring 41, the stopper 51, and the pre-assembled lamp 11 will be described. In this case, not only the electric wire 26 is connected to the prepared lamp 11, but also the electric wire 26 is fixed by the fixing means 61 shown in FIG. 1, FIG. 3, FIG. Specifically, as shown in FIG. 3 and the like, the fixing means 61 is formed by an electric wire holder 62 made of metal or the like, and a fixing component such as a screw 63 for fixing the electric wire holder 62 to one side surface of the rear convex portion 17. . The electric wire 26 is passed through the electric wire holder 62, and the portion of the electric wire holder 62 through which the electric wire 26 is passed is plastically deformed so as to reduce its diameter and holds the electric wire 26 so that it does not move relative to the electric wire holder 62. ing. Therefore, the end part side part near the light source 20 of the electric wire 26 is provided so that the one side surface of the back convex part 17 may be followed, as shown in FIG.3 and FIG.6. Moreover, the portion of the electric wire holder 62 through which the electric wire 26 is passed and the drawing position of the electric wire 26 with respect to the one concave portion 15a are shown in FIG. 3 along the one side surface of the rear convex portion 17 of the optical axis of the lamp 11. It is shifted so that it is located on both sides. In FIG. 8, reference numeral 16 b denotes an electric wire through hole provided in the body base portion 16 so as to open in one concave portion 15 a, and the electric wire 26 is led to the light source 20 through the electric wire through hole 16 b.

  First, the pair of protrusions 18 a of the lamp 11 are aligned with the pair of gaps G of the instrument body 31, and the lamp 11 is accommodated inside the instrument body 31 with the cover 12 at the top. As a result, the top portion of the cover 12 including the output convex portion 13 is inserted into the opening 32a of the fixture body 31, and the hemispherical outer surface 12a of the lamp 11 is in contact with the edge of the opening 32a to support the lamp 11. At the same time, the pair of protrusions 18a are disposed in the corresponding pair of gaps G. Further, in this accommodated state, the tip of the rear projection 17 of the lamp 11 protrudes higher than the arcuate wall 33 of the fixture body 31.

  Thereafter, a ring-shaped stopper 51 is accommodated in the instrument main body 31 so that the escape groove 53 faces the electric wire 26 drawn out from the lamp 11 toward the upper side of the instrument main body 31. The stopper 51 is placed on the step portion 36, and the rotation preventing projection 52 of the stopper 51 is fitted into one gap G. As a result, the rear surface convex portion 17 of the lamp 11 is passed through the inside without contacting the stopper 51, and the stopper 51 is separated from the arcuate portion 18 of the lamp 11 in the direction in which the center line of the fixture body 31 extends. Be placed. This separation distance is indicated by a symbol L in FIGS. The separation distance L is provided to allow the lamp 11 to be moved by a human hand with respect to the instrument body 31.

  Next, the leaf spring 41 to which the contact member 47 is previously attached is attached to the instrument body 31. This attachment is performed by pressing the leaf spring 41 by aligning each fixing portion 42 with the guide portion 34 of the instrument body 31. Thereby, immediately after the fixing portion 42 passes through the guide portion 34 while being elastically deformed, the fixing portion 42 enters the spring attachment hole 35 and is caught. In this case, as shown in FIGS. 1 and 2, the fixing portion 42 is arranged so as to sandwich the stopper 51 between the step portion 36. Therefore, simultaneously with the attachment of the leaf spring 41, the leaf spring 41 can be used to hold the stopper 51 so as not to be detached from the instrument body 31. At the same time, using the plurality of fixing portions 42 of the leaf spring 41 attached to the instrument body 31 as described above, the stopper 51 is sandwiched between these and the stepped portion 36 of the instrument body 31. The stopper 51 is attached to the instrument body 31 without requiring any special parts.

  By attaching the leaf spring 41, the pressing portion 43 of the leaf spring 41 is elastically deformed to some extent, and the end portion of the contact member 47 is sandwiched between the center portion 43a and the back surface 17a of the lamp 11. Accordingly, the biasing force of the leaf spring 41 acts on the lamp 11 via the contact member 47, and the hemispherical outer surface 12a of the lamp 11 is pressed against the edge of the opening 32a. Thus, the lamp 11 is held. Therefore, the frictional force between the edge of the opening 32a of the fixture body 31 and the hemispherical outer surface 12a of the lamp 11 pressed against the edge, and the pressing of the leaf spring 41 pressed against the back surface 17a of the lamp 11 and point-contacted thereto. The lamp 11 is held stationary by the frictional force with the portion 43.

  Finally, the electric wire 26 is routed. When the appliance body 31 is viewed from the back side, the electric wire 26 has a side edge 41a of the leaf spring 41 extending over the first arm 43b and the second arm 43c facing the escape groove 53 as shown in FIG. It passes through one arcuate wall 33 positioned so as to face this, and is drawn out of the instrument body 31. The side edge 41 a is formed to be curved so as to be recessed toward the center of the leaf spring 41.

  First, starting from the electric wire holder 62 that fixes the electric wire 26, the electric wire 26 is returned to the one recessed portion 15a, that is, the electric wire 26 is returned to the electric wire through hole 16b, and the electric wire 26 is moved to the first position. It extends over the arm 43b and is routed along the back surface of the third arm 43d. As a result, the portion of the electric wire 26 extending from the electric wire holder 62 to the third arm 43d, that is, the intermediate electric wire portion 26a straddling the first arm 43b is twisted and is U-shaped when the instrument body 31 is viewed from the back side. Presents. At the same time, the portion of the electric wire 26 that intersects the third arm 43d from the third arm 43d to the electrical connector 27, that is, the connector-side electric wire portion 26b is arcuate when the instrument body 31 is viewed from the back side. It is regulated so as to protrude from the outer surface of the wall 33 (see FIGS. 1 and 4), and is routed so as to protrude along the substantially tangential direction of the arcuate wall 33, for example.

  Next, such a state where the electric wire 26 is drawn is held by using the electric wire stopper 65. The wire stopper 65 fixes the electric wire 26 to the back surface of the third arm 43d, and for example, a band is used. The band passes through the groove 45 and fixes the electric wire 26 on the electric wire fixing portion 44 of the third arm 43d. Accordingly, the intermediate electric wire portion 26a protrudes from the connector-side electric wire portion 26b by the aforementioned twist applied to the intermediate electric wire portion 26a straddling the third arm 43d and the restriction in the protruding direction of the connector-side electric wire portion 26b. It is held in an inclined state on the side opposite to the protruding direction. This state is shown in FIG. 5, FIG. 9, and FIG. As described above, the side edge 41a is curved so as to be recessed toward the central portion of the leaf spring 41, so that the intermediate wire of the electric wire 26 can be changed in accordance with the operation of changing the direction of the lamp 11. The part 26a does not contact the side edge 41a of the leaf spring 41, or even if it contacts, it is slightly contacted and not rubbed strongly.

  The reading lamp 1 having the above configuration is accommodated in a protective case 57 indicated by a two-dot chain line in FIG. 5 and attached to the shoulder portion of the seat. By the way, since the intermediate | middle electric wire part 26a of the electric wire 26 withdraw | derived outside the instrument main body 31 is hold | maintained in the state which becomes diagonally opposite to the protrusion direction of the connector side electric wire part 26b as stated above, the leaf | plate spring 41 The protruding dimension R (see FIGS. 9 and 10) of the intermediate wire portion 26a in the direction away from the back surface of the wire can be shortened. In other words, the height dimension S (see FIGS. 9 and 10) from the ring portion 32 of the instrument main body 31 to the intermediate wire portion 26a can be shortened along the direction in which the central axis of the instrument main body 31 extends.

  Therefore, the reading lamp 1 can be suitably installed in a narrow installation place such as a seat shoulder without requiring a large installation space. In the installation of the reading lamp 1 on the seat shoulder, the connector-side electric wire portion 26b of the electric wire 26 has a direction different from the protruding direction of the intermediate electric wire portion 26a. Since it is drawn out so as to protrude from the outer surface of the arc-shaped wall 33 when viewed from the side, a space for accommodating the connector-side electric wire portion 26b in a direction away from the back surface of the leaf spring 41 is not required.

  The protective case 57 has a hole through which the output convex portion 13 passes. This hole is formed with a diameter that does not interfere with the tilt adjustment of the lamp 11. In the state of being attached to the seat, the front surface of the protective case 57 is covered with a cushion material and a front cover (not shown) of the seat, and the output convex portion 13 protrudes through the cushion material and the front cover. As a result, the direction of the lamp 11 can be adjusted, for example, by tilting the lamp 11 while holding the exit convex portion 13. Therefore, the adjustment operation is easier and accurate even with a slight movement compared to a configuration without the exit convex portion 13. it can. In this case, if the lamp 11 is pushed and operated so that the hemispherical outer surface 12a is separated from the opening 32a, the resistance to the movement of the lamp 11 is reduced, so that the direction of the lamp 11 can be adjusted more easily.

  Adjustment to change the irradiation direction of the light from the lamp 11 is realized by rotating the lamp 11 by giving the lamp 11 an operating force that exceeds the frictional force. At that time, the hemispherical outer surface 12a of the lamp 11 slides on the edge of the opening 32a of the fixture body 31, and the back surface 17a of the lamp 11 slides on the contact member 47 attached to the central portion 43a of the leaf spring 41. Therefore, when the lamp 11 is adjusted to a desired direction, the lamp 11 can be stopped at the position at that time by releasing the hand from the emission convex portion 13. In addition, since the width of the gap G of the fixture body 31 is sufficiently larger than the protrusion 18a of the lamp 11, the protrusion 18a freely moves in the gap G in the adjustment, and when the protrusion 18a hits the arcuate wall 33, the lamp 11 The maximum tilt angle is regulated.

  Further, the intermediate electric wire portion 26 a of the electric wire 26 straddles the first arm 43 b, one end of which is fixed to the lamp 11 operated to change the direction, and the other end is a plate fixedly attached to the instrument body 31. The spring 41 is fixed to the third arm 43d. The third arm 43d is located between the position where the electric wire 26 is drawn out of the instrument body 31, that is, between the side edge 41a of the leaf spring 41 and one arcuate wall 33 provided so as to face the side edge 41a. Farthest away from. In other words, in the leaf spring 41, the third arm 43d is farthest from the side edge 41a. Therefore, the length of the intermediate electric wire portion 26a is twice or more longer than the case where the fixing portion of the electric wire 26 to the leaf spring 41 is the first arm 43b or the second arm 43c.

  In the turning operation of the lamp 11 described above, when the lamp 11 is turned so that the fixing means 61 moves away from the leaf spring 41, the intermediate electric wire portion 26a is pulled as the wire holder 62 approaches the opening 32a of the device body 31. Moved. Then, following this pulling, as described above, the long intermediate electric wire portion 26a is smoothly deformed so as to approach the back surface of the first arm 43b with the electric wire stopper 65 as a fulcrum, and the fixing means 61 is a plate. Since it moves away from the side edge 41a of the spring 41, the intermediate | middle electric wire part 26a can maintain the state which straddled the 1st arm 43b in non-contact. In this case, the U-shape of the intermediate electric wire part 26a when the instrument main body 31 is viewed from the back side is deformed so as to be somewhat widened, but the intermediate electric wire part 26a is inclined on the opposite side to the connector-side electric wire part 26b. Maintain the laying state. Therefore, the intermediate electric wire part 26a is not strongly pressed and rubbed against the side edge 41a of the first arm 43b, so that the insulation coating of the electric wire 26 is not damaged.

  Note that, as the intermediate wire portion 26a is freely deformed as described above, the force that is pulled toward the opening 32a side of the instrument body 31 regardless of the turning operation is the third force of the leaf spring 41. It does not act on the part fixed to the arm 43d. Therefore, the intermediate electric wire portion 26a is not damaged by the side edge of the third arm 43d.

  Further, in the turning operation of the lamp 11, when the lamp 11 is turned so that the fixing means 61 approaches the side edge 41a of the leaf spring 41, the long intermediate electric wire portion 26a is connected to the back surface of the first arm 43b. Deforms smoothly so as to move away from it. In this case, the U-shape of the intermediate electric wire portion 26a when the instrument main body 31 is viewed from the back side is deformed so as to be somewhat narrowed. However, the intermediate electric wire portion 26a is inclined on the opposite side to the connector-side electric wire portion 26b. Maintain the routed state. As a result, the intermediate electric wire portion 26a is brought into a non-contact or slight contact with the side edge 41a of the leaf spring 41 and is prevented from being rubbed strongly, so that the intermediate electric wire portion 26a is not damaged.

  In this case as well, the intermediate electric wire portion 26a is freely deformed as described above, so that the intermediate electric wire portion 26a is pushed away from the back surface of the first arm 43b regardless of the turning operation. The force does not act on the portion of the leaf spring 41 that is fixed to the third arm 43d. Therefore, the intermediate electric wire portion 26a is not damaged by the side edge of the third arm 43d.

  At the same time, as described above, the long intermediate electric wire portion 26a is smoothly deformed so as to move away from the back surface of the first arm 43b. For this reason, with respect to the turning operation of the lamp 11, the fixing means 61 approaches the side edge 41a of the leaf spring 41. Therefore, the deformation of the intermediate electric wire portion 26a becomes tight and the resistance does not increase greatly. Therefore, the turning operation of the lamp 11 can be lightened.

  Further, it is conceivable that the lamp 11 is pushed in with an excessive force during the above adjustment operation. In addition, when a passenger passing through the passage accidentally pokes the reading lamp 1 by hand, the lamp 11 is pushed with an excessive force. In this case, the lamp 11 is pushed in by the maximum distance L, and the back convex portion 17 pushes the pressing portion 43 of the leaf spring 41 and elastically deforms the pressing portion 43 accordingly.

  However, when the push-in progresses to some extent, the arc-shaped portion 18 of the lamp 11 hits the stopper 51 attached to the fixture body 31. The stopper 51 is supported by a fixing portion 42 of a leaf spring 41 that is hooked by a plurality of spring mounting holes 35 and supported by the instrument body 31. Accordingly, the lamp 11 is received by the leaf spring 41 via the stopper 51, and further pushing of the lamp 11 is prevented. That is, the lamp 11 can be prevented from being pushed excessively beyond the separation distance L. As a result, all of the excessive pressing load does not act on the pressing portion 43 of the leaf spring 41 that urges the lamp 11 toward the opening 32 a of the instrument body 31. Thus, when the pushing of the lamp 11 is restricted by the stopper 51, the deformation of the pressing portion 43 of the leaf spring 41 is still within the elastic limit, so that the permanent deformation of the leaf spring 41 is prevented. And the lamp 11 is pushed back by the elastic return of the press part 43 of the leaf | plate spring 41 at the same time the said excessive pushing force lose | disappears. Accordingly, since the frictional force generated by the spring force of the leaf spring 41 is held at a predetermined value, the performance of holding the lamp 11 in the adjusted direction can be prevented from being lowered, and accordingly the irradiation direction of the lamp 11 can be reliably held. .

  In addition, since the stopper 51 is a ring, when the lamp 11 is excessively pushed, regardless of the direction of the lamp 11, in other words, the direction in which the lamp 11 is excessively pushed is any direction. However, the pressed lamp 11 can be reliably received by the stopper 51 supported by the instrument body 31 via the leaf spring 41. The same applies to the case where the direction of the lamp 11 is adjusted while the lamp 11 is pushed in. In this case, the center of rotation of the lamp 11 whose direction is being changed due to the position restriction by the stopper 51. Since it is possible to limit the change of the position, the direction of the lamp 11 can be easily adjusted.

  In addition, a movement force along the circumferential direction may act on the stopper 51 along with the above-described reception or in adjusting the direction of the lamp 11, but the detent projection 52 is fitted in the gap G. Therefore, the ring-shaped stopper 51 is not rotated. Therefore, it is possible to prevent the electric wire 26 from being damaged by being in contact with the edge of the leaf spring 41. The anti-rotation configuration described above is preferable in that no anti-rotation component is required.

  Moreover, in the reading lamp 1 having the above-described configuration, the contact member 47 made of a material having a lower strength than the lamp body (rear side portion) 15 of the lamp 11 is disposed between the pressing portion 43 of the leaf spring 41 and the rear surface 17a of the lamp body 15. Therefore, the contact member 47 can prevent the back surface 17a of the lamp 11 from being in direct contact with the plate spring 41 that is harder than the lamp 11 in accordance with the turning operation of the lamp 11. Thereby, in use of the reading lamp 1 for a long period of time, it is possible to suppress a decrease in the performance of holding the lamp 11 at the changed position and to maintain the operation force for operating the lamp 11 substantially constant. In order to obtain such an effect, instead of attaching the contact member 47 to the leaf spring 41, the contact member 47 is attached to the back surface 17 a of the lamp body 15 of the lamp 11, and the contact member 47 is attached to the central portion 45 a of the pressing portion 43. It can also be contacted.

The perspective view which shows the lighting fixture of one Embodiment of this invention seeing from the back side. The perspective view which shows the lighting fixture of FIG. 1 seeing from the front side. The perspective view which decomposes | disassembles and shows the lighting fixture of FIG. The rear view which shows the lighting fixture of FIG. The side view which shows the lighting fixture of FIG. Sectional drawing which shows the lighting fixture of FIG. Sectional drawing which follows F7-F7 line | wire in FIG. The rear view which shows the lighting fixture of FIG. 1 in the state which removed the leaf | plate spring and the electric wire. The side view of the lighting fixture seen from the arrow F9 direction in FIG. The side view of the lighting fixture shown from the arrow F10 direction in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Reading lamp (lighting fixture), 11 ... Lamp, 12 ... Cover (front side part), 12a ... Hemispherical outer surface, 15 ... Lamp body (back side part), 17 ... Back convex part, 17a ... Back, 20 ... Light source, 20b ... LED, 26 ... insulated coated electric wire, 26a ... intermediate electric wire portion of the insulated coated electric wire, 26b ... connector side electric wire portion of the insulated coated electric wire, 27 ... electric connector, 31 ... tool body, 32a ... opening of the tool body 33: Arc wall of the instrument body, 41: Leaf spring, 41a: Side edge of the leaf spring, 43: Pressing portion of the leaf spring, 43a ... Center portion of the pressing portion, 43b ... First arm, 43c ... Second Arm 43d ... Third arm 44 ... Plate spring electric wire fixing part 47 ... Contact member 61 ... Fixing means 62 ... Electric wire holder 63 ... Screw 65 Electric wire stopper R ... Projection dimension of intermediate electric wire part

Claims (2)

A lamp with a built-in light source, wherein the front side portion of the lamp has a hemispherical outer surface, and the back side portion of the lamp has a back surface formed of a part of a spherical surface;
The lamp has an opening smaller than the maximum diameter of the arcuate wall and the hemispheric outer surface, and the lamp is turned within a predetermined range so that the irradiation direction by the lamp can be changed by receiving the hemispheric outer surface at the edge of the opening. An instrument body to support it;
The first to third arms attached to the main body of the apparatus are provided with a pressing portion that is formed in a trifurcated shape and presses the back surface. The pressing portion presses the lamp against the edge of the opening. Leaf springs;
One end is electrically connected to the light source and is drawn out of the instrument body through the space between the side edge of the pressing portion and the arcuate wall across the first and second arms, and at the other end An insulated wire with an electrical connector attached;
The portion of the electric wire that crosses the third arm is fixed to the third arm, and the connector-side electric wire portion extending from the fixing portion to the electric connector is seen in the arc shape when the instrument body is viewed from the back side. A wire stopper that regulates to protrude from the outer surface of the wall;
The insulation covered electric wire is fixed to the rear side portion, and the intermediate electric wire portion extending from the fixing portion across the first arm to the electric wire stopper is inclined to the side opposite to the protruding direction of the connector side electric wire portion. Fixing means for regulating the state together with the wire stopper;
The lighting fixture characterized by comprising.   A contact member made of a material whose strength is lower than that of the back side part is attached to the pressing part or the back side part, and the contact member is brought into contact with the back side of the back side part or the center part of the pressing part. The lighting fixture according to claim 1.

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