JP5285559B2 - Light emitting device - Google Patents

Description

  The present invention relates to a light emitting device including a light emitting tube having directivity, and more particularly to a light emitting device that can easily change the direction of irradiation light (that is, the light distribution direction) and can be operated safely.

  Various fluorescent lamp type light-emitting devices using, for example, light-emitting diodes (LEDs) as light sources have been proposed (see Japanese Patent Application Laid-Open Nos. 2006-100036 and 2007-257928). In general, light-emitting diodes have recently attracted attention as a light source for light-emitting devices because they consume less power and have a longer lifetime than fluorescent lamps.

  However, since the viewing angle of the light emitting diode is limited to a certain range, the irradiation light can be irradiated only in a certain range, and therefore, the conventional light emitting device using the light emitting diode has a limited use. there were.

  On the other hand, Japanese Patent Laid-Open No. 2007-122933 proposes a substrate in which an LED is mounted on a support base so as to be rotatable, and the direction of irradiation light can be changed by rotating the substrate. Yes.

  However, in this case, since it is necessary to rotate the substrate directly, there is a risk that the wiring portion of the substrate is damaged during the operation or the circuit is short-circuited by directly touching the wiring portion. Further, in this case, since the rotation axis of the substrate is only supported by the support base by frictional force, the position of the substrate once set may be easily shifted by the action of vibration or the moment of the substrate itself. There is.

  The present invention has been made in view of such conventional circumstances, and a problem to be solved by the present invention is to provide a light emitting device that can easily change the direction of irradiation light and can be operated safely. It is in. In addition, the present invention is intended to provide a light emitting device that can reliably change the direction of irradiation light.

The light-emitting device according to the invention of claim 1 is a light-emitting tube having directivity, a base portion having an electrode disposed at least on one end side of the light-emitting tube and detachably connected to an external socket portion at one end. Rotating angle position changing means provided between the arc tube and the base part, and capable of changing the rotational angle position of the arc tube with respect to the base part. The rotation angle position changing means includes a plurality of balls arranged on the circumference on either side of the arc tube or the base and elastically biased in the axially protruding direction, and the other of the arc tube or the base And a plurality of engaging recesses that are detachably engageable with each other, and are formed in a circumferential groove formed at the end of the arc tube. Is supported rotatably.

  According to the first aspect of the present invention, when changing the direction of the irradiation light of the light emitting device, the arc tube may be rotated with respect to the base portion via the rotation angle position changing means. Can be easily changed. In addition, in this case, since it is not necessary to directly rotate the substrate as in the conventional case, the direction of the irradiation light can be safely operated.

When the arc tube is rotated with respect to the base part, the ball on the side of the arc tube (or base part) is engaged with the engagement recess on the side of the base part (or arc tube), whereby the base of the arc tube Since the rotation angle position with respect to the part is set, the rotation angle position once set is not easily shifted by vibration or the like, and this makes it possible to reliably change the direction of the irradiation light.

In the invention of claim 2, the engagement state of the ball with respect to the engagement recess is released by rotating the arc tube with respect to the base portion.

When the arc tube is rotated relative to the base part, the ball on the arc tube (or base part) side comes out of the engagement recess on the base part (or arc tube) side, and the arc tube rotates relative to the base part. Then, when the ball is engaged with another engagement recess, a new engagement state of the ball with respect to the engagement recess is formed.

According to a third aspect of the present invention, in the first aspect, the ball is electrically connected to the electrode of the base portion.

In the invention of claim 3, the ball is electrically connected to the electrode of the base portion connected to the external socket portion, so that the external socket portion is interposed via the ball and the engaging concave portion with which the ball is engaged. Is applied to the arc tube. In this case, it is possible to realize a light emitting device that eliminates the need for wiring such as a lead wire between the external socket portion.

As described above, according to the light-emitting device of the present invention, the directional light-emitting tube and the electrode that is disposed on at least one end side of the light-emitting tube and is detachably connected to the external socket portion are provided at one end. and the base portion having provided between the arc tube and the base portion, the rotational angular position is provided and can be changed angular position changing means Rutotomoni against the base part of the arc tube, the rotational angular position changing means, the light emitting tube or A plurality of balls arranged on the circumference on either side of the base part and elastically biased in the axially projecting direction, and arranged on the circumference on the other side of the arc tube or base part In addition, it is composed of a plurality of engaging recesses in which a plurality of balls can be detachably engaged, and the base portion is rotatably supported in a circumferential groove formed at the end of the arc tube. When changing the direction of the irradiation light of the device, Via the angular position changing means may be rotated an arc tube with respect to the base part, which makes it possible to easily change the orientation of the illumination light. In addition, in this case, since it is not necessary to directly rotate the substrate as in the conventional case, the direction of the irradiation light can be safely operated. When the arc tube is rotated with respect to the base part, the ball on the side of the arc tube (or base part) is engaged with the engagement recess on the side of the base part (or arc tube), whereby the base of the arc tube Since the rotation angle position with respect to the part is set, the rotation angle position once set is not easily shifted by vibration or the like, and this makes it possible to reliably change the direction of the irradiation light.

It is a figure which shows schematic structure of the light-emitting device by the 1st Example of this invention. It is the II-II arrow directional view of FIG. It is the III-III arrow line view of FIG. It is a figure which shows schematic structure of the light-emitting device by the 2nd Example of this invention. It is a schematic block diagram of the rotation angle position change part in the said light-emitting device (FIG. 4). FIG. 6 is a view taken along line VI-VI in FIG. 5. It is a figure which shows schematic structure of the light-emitting device by the 3rd Example of this invention. It is a schematic block diagram of the arc_tube | light_emitting_tube edge part and base part in the said light-emitting device (FIG. 7). It is the IX-IX arrow directional view of FIG. It is a perspective view which shows schematic structure of the edge part side of the light-emitting device by the 4th Example of this invention. It is a figure which shows the pin lock state in the said light-emitting device (FIG. 10). It is a figure which shows the pin lock cancellation | release state in the said light-emitting device (FIG. 10). It is a figure which shows schematic structure of the light-emitting device by the 5th Example of this invention. It is a perspective view which shows schematic structure of the edge part side of the said light-emitting device (FIG. 13). It is a figure which shows schematic structure of the light-emitting device by the modification of the said 5th Example. FIG. 16 is an enlarged front view of a connector for connecting adjacent arc tubes in the light emitting device (FIG. 15). It is a figure which shows schematic structure of the light-emitting device by the 6th Example of this invention. It is a figure which shows schematic structure by the side of the edge part of the said light-emitting device (FIG. 17), Comprising: The engagement state of the arc_tube | light_emitting_tube and a nozzle | cap | die part is shown. It is the XIX-XIX sectional view taken on the line of FIG. It is the XX-XX sectional view taken on the line of FIG. It is a figure which shows schematic structure of the light-emitting device by the 7th Example of this invention. It is a longitudinal cross-sectional view which shows schematic structure by the side of the edge part of the said light-emitting device (FIG. 21). It is a whole perspective view of the nozzle | cap | die part of the said light-emitting device (FIG. 21).

Embodiments of the present invention will be described below with reference to the accompanying drawings.
[First embodiment]
FIG. 1 shows a light emitting device according to a first embodiment of the present invention. As shown in the figure, the light-emitting device 1 is arranged at a tubular arc tube 2 extending linearly in the longitudinal direction, and at an end of the arc tube 2, with respect to an external socket (not shown). There are provided cap portions 3 and 4 each having a pair of pin terminals (electrodes) 30 and 40 which are detachably connected to each other. The socket part is fixed to, for example, an indoor ceiling or wall surface, or fixed to a panel of a control panel.

A substrate 10 extending in the longitudinal direction is disposed inside the arc tube 2, and a plurality of LEDs 11 are mounted on the substrate 10. In general, since the viewing angle of the LED is limited to a certain range, the arc tube 2 using the LED as a light source has directivity. In addition, the arc tube 2 has directivity even when the light source is mounted on the front surface of the substrate 10 and is not mounted on the back surface of the substrate 10.
Each LED 11 is electrically connected to each pin terminal 30, 40 via, for example, a lead wire (not shown). Moreover, although the arc tube 2 is covered with the glass tube 20, since it is not necessary to enclose gas inside like the conventional fluorescent tube, an airtight structure is not required. As clearly shown in FIG. 1, the external structure of the light emitting device according to this example (the same applies to each of the following examples described later) is the same as that of a conventional fluorescent tube. It can be substituted.

  The base part 3 is disposed on the arc tube 2 side and fixed to the arc tube 2, the base part 3 </ b> A is disposed on the outer side and a pin terminal 30 is provided at one end, and the first base part It is comprised from 2nd nozzle | cap | die part 3B adjacent to 3A.

  A plurality of teeth 3a are formed on the end face of the first base portion 3A in a region extending in an annular shape along the outer periphery thereof (see FIG. 2). A hole 31 is formed in the center of the end face of the first base part 3A.

  On the end face of the second base portion 3B, a plurality of teeth 3b that mesh with the teeth 3a are formed in an annular region facing the teeth 3a of the first base portion 3A. Further, one end of the shaft portion 32 is planted in the center of the end face of the second base portion 3B, and the other end of the shaft portion 32 extends into the hole 31 formed in the first base portion 3B. Yes. The center portion (centering) of the first and second base portions 3A and 3B is performed by the shaft portion 32 and the hole 31.

  The base part 4 is disposed on the arc tube 2 side and is fixed to the arc tube 2, and is disposed in the first base part 4 </ b> A having the concave part 41 and the concave part 41 of the first base part 4 </ b> A and has one end. And a second base portion 4B provided with a pin terminal 40.

  As shown in FIG. 3, a plurality of teeth 4b are formed on the outer periphery of the second base part 4B, and the first base part 4A has a plurality of teeth that mesh with the teeth 4b of the second base part 4B. Inner peripheral teeth 4a are formed.

  When the first and second base parts 3A and 3B of the base part 3 are moved in the axial direction (left and right direction in FIG. 1) toward the side away from each other by a human hand, the first and second base parts 3A, The teeth 3a and 3b of 3B are disengaged, and similarly, in the base part 4, the first and second base parts 4A and 4B are moved in the axial direction (left and right direction in the figure) toward the side away from each other. If it does, the meshing state of each tooth | gear 4a, 4b of 1st, 2nd nozzle | cap | die part 4A, 4B will remove | deviate. Thereby, the arc tube 2 is placed in a state in which the arc tube 2 can rotate around the axis with respect to the cap portions 3 and 4. Therefore, the first and second base parts 3A and 3B and the first and second base parts 4A and 4B can be changed in rotational angle position with respect to the base parts 3 and 4 of the arc tube 2. Is configured.

  In the light emitting device 1 configured as described above, when changing the direction of the irradiation light, the arc tube 2 and the second base parts 3B, 4B are moved away from each other, and the first base part 3A is moved. 4A and the 2nd nozzle | cap | die part 3B, 4B each meshing state is cancelled | released. This operation is performed, for example, in a state where the light emitting device 1 is removed from the external socket. Next, the arc tube 2 is rotated by a desired rotation angle, and then the first base portions 3A and 4A and the second base portions 3B and 4B are meshed again. In this state, the light emitting device 1 is fitted into the external socket.

  According to this embodiment, when the direction of the irradiation light of the light emitting device 1 is changed, it is only necessary for the person to rotate the arc tube 2 by hand, so that the direction of the irradiation light can be easily changed. . In addition, in this case, it is only necessary to rotate the arc tube 2, and it is not necessary to directly rotate the substrate 10 inside the arc tube, so that the direction of irradiation light can be safely operated. Furthermore, in this case, the teeth 3a, 4a of the first base part 3A, 4A and the teeth 3b, 4b of the second base part 3B, 4B are engaged with each other, so that the second base part 3B of the arc tube 2 is engaged. Since the rotation angle position with respect to 4B is set, the rotation angle position once set does not easily shift due to vibration or the like, so that the direction of irradiation light can be changed reliably.

  In the first embodiment, the base parts 3 and 4 have different structures from each other. However, both base parts 3 and 4 may have the same structure. That is, the base part 4 may have the same structure as the base part 3, or the base part 3 may have the same structure as the base part 4.

  When the base part 4 has the same structure as the base part 3, when the arc tube 2 is moved away from the second base parts 3B and 4B, the axial movement amount of the arc tube 2 can be reduced. By reducing the height of each tooth 3a, 3b, the arc tube 2 can be rotated with the light emitting device 1 fitted in the external socket portion, particularly when the external socket portion is a press-fitting type. It becomes possible.

  Further, in the first embodiment, the example in which each of the base parts 3 and 4 has a gear meshing structure is shown. For example, in the base part 4, a ratchet wheel (claw wheel) is used as the second base part 4B. ) And a ratchet engagement mechanism using a pawl (claw) that engages with the second base part 4B as the first base part 4A. When such a ratchet engagement mechanism is used for both the cap parts 3 and 4, the light emitting tube 2 can only rotate in one direction, but the irradiation light with the light emitting device 1 attached to the external socket part. It becomes possible to change the direction of.

[Second Embodiment]
FIG. 4 shows a light emitting device according to a second embodiment of the present invention. In the second embodiment, the same reference numerals as those in the first embodiment denote the same or corresponding parts. As shown in the figure, the light emitting device 1 extends in a straight line in the longitudinal direction and is disposed on both ends of the tubular light emitting tube 2 having the substrate 10 on which the LED 11 is mounted, and both ends of the light emitting tube 2, A base part 3 having a pair of pin terminals (electrodes) 30 detachably connected to an external socket part (not shown) at one end, and the arc tube 2 and each base part 3; A rotation angle position changing unit 5 for changing the rotation angle position of each arc tube 2 with respect to each cap part 3 is provided.

  As shown in FIGS. 5 and 6, the rotation angle position changing unit 5 has a plurality of holes 21 arranged at predetermined intervals (preferably at equal intervals) on the circumference on the end surface 2 a of the arc tube 2. In each hole 21, a ball (projecting portion) 22 is accommodated so as to be able to protrude and retract with respect to the opening end of the hole 21, and a compression coil spring 23 is contracted. The ball 22 is always urged in a direction in which a part of the ball 22 protrudes from the opening end of the hole 21 by the elastic repulsive force of the compression coil spring 23. Further, a circumferential groove 2 b is formed on the outer periphery of the end portion of the arc tube 2.

  Further, as shown in FIGS. 4 and 5, the rotation angle position changing unit 5 has a holding part 50 that holds the end of the arc tube 2 and is connected to the base part 3. One end of the shaft portion 51 is planted in the center of the outer end surface 50a of the holding portion 50, and the other end of the shaft portion 51 is fitted into a hole 33 (FIG. 4) formed in the base portion 3. Are fixed to the holes 33. A plurality of shallow holes (engaging recesses) 52 having a spherical shape (or a conical shape or a pyramid shape) are formed on the inner end surface 50b of the holding portion 50 at predetermined intervals (preferably at equal intervals) on the circumference. The interval between the holes 52 corresponds to the interval between the holes 21 on the arc tube 2 side, and the balls 22 are detachably engaged with the holes 52. Further, a part of the outer peripheral edge of the inner end face 50b of the holding part 50 extends in a thin shape toward the arc tube 2, and the end of the extended part 53 is radially inward. A bent portion 53a that is bent toward the top is formed. The bent portion 53 a engages with the circumferential groove 2 b on the outer periphery of the arc tube, so that the holding portion 50 is detachably attached to the end portion of the arc tube 2.

  In the light-emitting device 1 configured as described above, when changing the direction of the irradiation light, the light-emitting tube 2 is connected to each base portion 3 and each holding portion 50 in a state where the light-emitting device 1 is fitted in an external socket portion. Is rotated by a desired rotation angle. Then, each ball 22 at the end of the arc tube that has been engaged with each hole 52 of the holding unit 50 leaves the respective holes 52 and rotates together with the arc tube 2, and after the arc tube 2 rotates by a desired rotation angle. Each ball 22 at the end of the arc tube engages with each corresponding hole 52. In the middle of the rotation of the arc tube 2, even if the ball 22 is fitted in the hole 52, the ball 22 immediately leaves the hole 52 and rotates with the light emitting unit 2.

  According to this embodiment, when the direction of the irradiation light of the light emitting device 1 is changed, it is only necessary for the person to rotate the arc tube 2 by hand, so that the direction of the irradiation light can be easily changed. . In addition, in this case, it is only necessary to rotate the arc tube 2, and it is not necessary to directly rotate the substrate 10 inside the arc tube, so that the direction of irradiation light can be safely operated. Further, in this case, since each ball 22 engages with each hole 52, the rotation angle position of the arc tube 2 with respect to the cap portion 3 is set. Thus, it is possible to reliably change the direction of the irradiation light.

  In the second embodiment, the compression coil spring 23 is used as a spring for urging each ball 22, but a plate spring may be used instead of the compression coil spring 23.

  In the second embodiment, the ball 22 as the projecting portion is provided on the arc tube 2 side, and the hole 52 as the engaging recess with which the projecting portion is engaged is formed on the holding portion 50 side. However, in the present invention, conversely, a ball may be provided on the holding portion 50 side and a hole with which the ball is engaged may be formed on the arc tube 2 side.

  In the second embodiment, the electrical connection between each LED 11 and each pin terminal 30 is performed via, for example, a lead wire as in the first embodiment. You may use the brush connected to this, or you may make it use an electromagnetic latch-type contact.

[Third embodiment]
FIG. 7 shows a light emitting device according to a third embodiment of the present invention. In the third embodiment, the same reference numerals as those in the first and second embodiments denote the same or corresponding parts. As shown in the figure, the light emitting device 1 extends in a straight line in the longitudinal direction and is disposed on both ends of the tubular light emitting tube 2 having the substrate 10 on which the LED 11 is mounted, and both ends of the light emitting tube 2, A base part 3 having a pair of pin terminals (electrodes) 30 detachably connected to an external socket part (not shown) at one end is provided.

  As shown in FIGS. 8 and 9, a conductive end plate 24 is attached to the end of the arc tube 2. The end plate 24 is a substantially annular member, and a part of the inner peripheral edge thereof extends in the axial direction toward the inside of the arc tube 2, and the extended portion 24 a is an end of the substrate 10. It is fixed to the part by bolts 6a and nuts 6b. The end plate 24 is electrically connected to a wiring location on the substrate 11. On the outer end surface of the end plate 24, a plurality of spherical (or conical or pyramidal) shallow holes (engaging recesses) 25 are formed on the circumference at predetermined intervals (preferably at equal intervals). Further, a circumferential groove 2 b is formed on the outer periphery of the end portion of the arc tube 2.

  The inner end surface 3c of the base part 3 has a plurality of holes 34 arranged at predetermined intervals (preferably at equal intervals) on the circumference, and the intervals between the holes 34 are the holes on the arc tube 2 side. This corresponds to 25 intervals. A conductive ball (projecting portion) 35 is accommodated in the opening end side in each hole 34 so as to be able to protrude and retract with respect to the opening end, and a base portion of the pin terminal 30 is inserted in the bottom side of each hole 34. In each hole 34, a conductive compression coil spring 36 is contracted between the base of the pin terminal 30 and the ball 35. One end of the compression coil spring 36 is in pressure contact with the ball 35, and the other end is in pressure contact with the base of the pin terminal 30. The ball 35 is constantly urged in a direction in which a part of the ball 35 protrudes from the opening end of the hole 34 by the elastic repulsive force of the compression coil spring 36. Further, the pin terminal 30 is electrically connected to the ball 35 through a compression coil spring 36.

  Further, a part of the outer peripheral edge portion of the inner end surface 3c of the base part 3 extends in a thin shape toward the arc tube 2, and the distal end of the extended part 36 is radially inward. A bent portion 36a that is bent toward the top is formed. The base portion 3 is detachably mounted on the end portion of the arc tube 2 by engaging the bent portion 36a with the circumferential groove 2b on the outer periphery of the arc tube.

  In the light emitting device 1 configured as described above, when changing the direction of the irradiation light, the light emitting tube 2 is placed around each base portion 3 in a state where the light emitting device 1 is fitted in an external socket portion. Rotate only the rotation angle. Then, each ball 35 of the base part 3 engaged with each hole 25 of the end plate 24 of the arc tube 2 leaves each hole 25 and the arc tube 2 rotates. Then, after the arc tube 2 is rotated by a desired rotation angle, each ball 35 of the base 3 is engaged with each corresponding hole 25 of the end plate 24. In the middle of the rotation of the arc tube 2, even if the ball 35 fits into the hole 25, the ball 35 immediately leaves the hole 25 and the light emitting unit 2 rotates.

  According to this embodiment, when the direction of the irradiation light of the light emitting device 1 is changed, it is only necessary for the person to rotate the arc tube 2 by hand, so that the direction of the irradiation light can be easily changed. . In addition, in this case, it is only necessary to rotate the arc tube 2, and it is not necessary to directly rotate the substrate 10 inside the arc tube, so that the direction of irradiation light can be safely operated. Furthermore, in this case, since each ball 35 is engaged with each hole 25, the rotation angle position of the arc tube 2 with respect to the cap portion 3 is set, so that the rotation angle position once set can be easily set by vibration or the like. Thus, it is possible to reliably change the direction of the irradiation light.

  In this case, each ball 35 is electrically connected to the pin terminal 30 of the base portion 3 connected to the external socket portion, so that each ball 35 and the hole 25 with which the ball 35 is engaged are connected. The voltage from the external socket is applied to the inside of the arc tube 2. In this case, it is possible to realize a device that eliminates the need for wiring such as lead wires with the external socket portion.

[Fourth embodiment]
FIG. 10 shows a light emitting device according to a fourth embodiment of the present invention. In the fourth embodiment, the same reference numerals as those in the first to third embodiments denote the same or corresponding parts. The arc tube 2 extends linearly in the longitudinal direction as in the above embodiments, and a substrate on which an LED is mounted is accommodated therein. At both ends of the arc tube 2, a base part 3 having a pair of pin terminals (electrodes) 30 that are detachably connected to an external socket part (not shown) is provided at one end.

  A pin assembly 7 including a pin 70 extending in a direction protruding from the end surface is provided on the end surface of the arc tube 2. The pin assembly 7 includes an annular main body 7A disposed along the outer periphery of the end face of the arc tube 2, and an elastically deformable leaf spring extending from the approximate center of the main body 7A beyond the center of the arc tube 2. And a pin 70 is implanted in the vicinity of the tip of the leaf spring portion 7B. As shown in FIGS. 11 and 12, a tapered surface 7a is formed at the tip of the leaf spring portion 7B.

  An operation button 8 is provided above the pin assembly 7 on the end face of the arc tube 2. In this example, the operation button 8 includes a bar 80 extending in the horizontal direction and a hanging portion 81 that is hung in a direction orthogonal to the bar 80. As shown in FIGS. 11 and 12, a tapered surface 81 a that engages with the tapered surface 7 a of the leaf spring portion 7 </ b> B is formed at the tip of the hanging portion 81.

  A plurality of pin holes 37 into which the pins 70 of the pin assembly 7 can detachably engage are formed on the inner end surface 3c of the base part 3 at predetermined intervals (preferably at equal intervals) on the circumference. As shown in FIG. 11, the state in which the pin 70 of the pin assembly 7 is engaged with any one of the pin holes 37 of the base part 3 is a pin lock state, and as shown in FIG. A state where the pin 37 is removed from the hole 37 is a pin lock release state.

  In the light emitting device 1 configured as described above, when changing the direction of the irradiation light, first, the person holds the bar 80 of the operation button 8 with a finger while the light emitting device 1 is fitted in the external socket. Push in (see FIG. 12). Then, the tapered surface 81a at the distal end of the hanging portion 81 of the operation button 8 presses the tapered surface 7a at the distal end of the leaf spring portion 7B, and as a result, the leaf spring portion 7B is elastically deformed and bent (see FIG. 12). As a result, the pin 70 implanted near the tip of the leaf spring portion 7B moves to the side away from the base portion 3 so that the pin 70 is detached from the pin hole 37 of the base portion 3 and the pin 70 and the pin hole 37 are The engaged state is released.

  From this state, the arc tube 2 is rotated around the base part 3 by a desired rotation angle. After the arc tube 2 is rotated by a desired rotation angle, the bar 80 of the operation button 8 is pulled back to the original position (see FIG. 11). Then, the elastically deformed leaf spring portion 7B returns to its original state, and the pin 70 of the leaf spring portion 7B engages with any pin hole 37 of the base portion 3.

  According to this embodiment, after the person operates the operation button 8 for forcibly releasing the engagement state of the pin 70 with respect to the pin hole 37 with a finger, the arc tube 2 is moved with respect to the base 3. Since it is only necessary to rotate, the direction of the irradiation light of the light emitting device 1 can be easily changed. In addition, in this case, it is only necessary to rotate the arc tube 2, and it is not necessary to directly rotate the substrate inside the arc tube, so that the direction of irradiation light can be safely operated. Further, in this case, the rotational angle position of the arc tube 2 with respect to the cap portion 3 is set by engaging the pin 70 with the pin hole 37, and the pin 70 and the pin hole 37 are not operated until the operation button 8 is operated. Thus, the rotation angle position once set is not easily displaced by vibration or the like, and the direction of the irradiation light can be changed reliably.

  In the fourth embodiment, the pin 70 is detachably engaged with the pin hole 37 by the spring action of the leaf spring portion 7B. A compression coil spring may be used in place of the leaf spring portion, and a plurality of holes in which the ball is detachably engaged may be formed in the base portion 3. In this case, the operation of the operation button 8 moves the ball away from the hole.

  In the fourth embodiment, the pin 70 and the operation button 8 are provided on the arc tube 2 side, and the pin hole 37 to be engaged with the pin 70 is formed on the base part 3 side. On the contrary, a pin and an operation button may be provided on the base 3 side, and a pin hole with which the pin is engaged may be formed on the arc tube 2 side.

[Fifth embodiment]
FIG. 13 shows a light emitting device according to a fifth embodiment of the present invention. In the fifth embodiment, the same reference numerals as those in the first to fourth embodiments denote the same or corresponding parts. As shown in the figure, the light emitting device 1 extends linearly in the longitudinal direction, and has a tubular arc tube 2 having a substrate 10 on which the LED 11 is mounted, and an arc tube 2 fixed to both ends of the tube. A fixed base portion 3C having a pin terminal 30C and a pair of pin terminals (electrodes) which are respectively disposed on both ends of the arc tube 2 and are detachably connected to an external socket portion (not shown). 30 at each end, and a base part 3 that is detachably attached to the fixed base part 3C of the arc tube 2.

  As shown in FIG. 14, the base part 3 has a plurality of pin holes 37 arranged at predetermined intervals (preferably at equal intervals) on the circumference on the inner end face 3c thereof. Each pin terminal 30 </ b> C of the fixed base portion 3 </ b> C can be freely inserted into and removed from each pin hole 37 of the base portion 3. Further, the pin terminal 30 of the base part 3 is electrically connected to the pin terminal 30 </ b> C of the fixed base part 3 </ b> C in the pin hole 37.

  In the light emitting device 1 configured as described above, when changing the direction of irradiation light, the light emitting device 1 is removed from the external socket portion, and the base portions 3 at both ends of the light emitting device are removed. The tube 2 is rotated with respect to each base part 3 by a desired rotation angle. After the rotation, the pin terminals 30C of the fixed base part 3C at both ends of the arc tube are inserted into the corresponding pin holes 37 of the base part 3. Thereafter, the light emitting device 1 is attached to the external socket portion again using the pin terminals 30 of the cap portions 3 at both ends of the light emitting device.

  According to this embodiment, when the direction of the irradiation light of the light emitting device 1 is changed, it is only necessary to rotate the arc tube 2 with respect to the base part 3, so that the direction of the irradiation light can be easily changed. Can be done. In addition, in this case, it is only necessary to rotate the arc tube 2, and it is not necessary to directly rotate the substrate 10 inside the arc tube, so that the direction of irradiation light can be safely operated. Further, in this case, since the pin terminal 30C of the fixed base part 3C of the arc tube 2 is engaged with the pin hole 37 of the base part 3, the rotational angle position of the arc tube 2 with respect to the base part 3 is set. The rotation angle position once set does not easily shift due to vibration or the like, so that the direction of irradiation light can be changed reliably.

  Next, FIG. 15 shows a modification of the fifth embodiment. Here, an example in which three arc tubes 2 are connected in series is shown. In the drawing, the structure at each end of two arc tubes 2 arranged at both ends is the same as that of the fifth embodiment. In this modified example, a connector 3 ′ is further provided between each arc tube 2 at both ends and the central arc tube 2. As shown in FIG. 16, the connector 3 ′ has a plurality of pin holes 37 ′ arranged at predetermined intervals (preferably at equal intervals) on the circumference on both end surfaces thereof. In each pin hole 37 ′, the pin terminal 30 </ b> C of the fixed base portion 3 </ b> C of the arc tube 2 can be freely inserted and removed. Further, the pin terminals 30C of the adjacent fixed cap portions 3C are electrically connected through the electrical connection portions 3'a in the pin holes 37 '.

  In this case, by using the coupler 3 ′, a plurality of arc tubes 2 can be connected in series, and a long light emitting device can be configured. Thereby, it is possible to cope with light emitting devices of various lengths by preparing only one kind of short tube as the light emitting tube 2, and as a result, it is possible to reduce the inventory of products. Further, by combining the fixture 3 ′ with the fixed base 3 </ b> C, it is possible to increase the length of the non-light emitting region, thereby reducing the number of arc tubes 2 to be used. Further, it is possible to connect arc tubes 2 having different hues. Moreover, it is also possible to connect the arc tubes 2 connected to each other so that their irradiation directions are different.

[Sixth embodiment]
FIG. 17 shows a light emitting device according to a sixth embodiment of the present invention. In the sixth embodiment, the same reference numerals as those in the first to fifth embodiments denote the same or corresponding parts. As shown in the figure, the light-emitting device 1 extends linearly in the longitudinal direction, and is disposed on each of the tubular arc tube 2 having a substrate 10 on which the LED 11 is mounted, and both ends of the arc tube 2. And a base part 3 having a pair of pin terminals (electrodes) 30 detachably connected to an external socket part (not shown) at one end.

  As shown in FIG. 18, small-diameter portions 26 are formed at both ends of the arc tube 2, and flange portions 27 that project outward in the radial direction are formed at the axial ends of the small-diameter portions 26. (See FIG. 19). In addition, a plurality of engagement holes 29 are formed on the circumference at predetermined intervals (preferably at equal intervals) on the end surface of the stepped portion by the small diameter portion 26 at both end portions of the arc tube 2 (see FIG. 20).

  The base portion 3 is a bottomed cylindrical member and is disposed so as to cover the small diameter portion 26 of the arc tube 2. A flange portion 38 is formed on the inner end face of the base portion 3 so as to project radially inward and to face the flange portion 27 of the small diameter portion 26. A compression spring 28 is interposed between the flange portions 27 and 38. A plurality of protrusions 39 are provided on the inner end face of the base part 3. Each protrusion 39 can be detachably engaged with the engagement hole 29 on the arc tube 2 side.

  A pair of protrusions 3f protruding radially inward are provided on the inner peripheral surface of the base 3 at intervals of 180 degrees (see FIG. 19). Each protrusion 3f is disposed at a position where the flange portion 27 of the small diameter portion 26 of the arc tube 2 interferes in the circumferential direction when the arc tube 2 rotates. That is, the flange portion 27 and the protruding portion 3 f function as a rotation amount regulating means that regulates the rotation amount of the arc tube 2 with respect to the base portion 3. The pin terminal 30 provided on the outer end surface of the base part 3 is electrically connected to the lead wire 15 disposed inside the base part 3 and the arc tube 2.

  In the light emitting device 1 configured as described above, when changing the direction of the irradiation light, the light emitting device 1 is removed from the external socket, and from this state, the arc tube 2 and the base 3 are connected to the compression spring 28. Move to the side away from each other against elastic repulsion. Then, a gap is formed between the end surface of the stepped portion of the arc tube 2 and the end surface of the base portion 3, and the engagement state between the projection 39 of the base portion 3 and the engagement hole 29 of the arc tube 2 is released. From this state, the arc tube 2 is rotated by a desired rotation angle with respect to the base 3. After the rotation, the arc tube 2 and the base portion 3 are moved toward each other by the elastic repulsive force of the compression spring 28, and the protrusion 39 of the base portion 3 is engaged with another engagement hole 29 of the arc tube 2, A new engagement state is formed. The above operation is performed for each cap 3 at both ends of the arc tube 2. Thereafter, the light emitting device 1 is attached to the external socket portion again using the pin terminals 30 of the cap portions 3 at both ends of the light emitting device.

  According to this embodiment, when the direction of the irradiation light of the light emitting device 1 is changed, the arc tube 2 may be rotated by the person with respect to the base 3 by hand. Can be changed easily. In addition, in this case, it is only necessary to rotate the arc tube 2, and it is not necessary to directly rotate the substrate 10 inside the arc tube, so that the direction of irradiation light can be safely operated. Further, in this case, the projection 39 of the base part 3 is engaged with the engagement hole 29 of the arc tube 2 so that the rotational angle position of the arc tube 2 with respect to the base part 3 is set. The rotation angle position does not easily shift due to vibration or the like, and this makes it possible to reliably change the direction of irradiation light. Further, in this case, when the arc tube 2 is rotated, the rotation amount of the arc tube 2 is limited to within 180 degrees because each flange portion 27 interferes with each projection portion 3 f of the base portion 3. It can control so that it may not rotate more than needed, and, thereby, twist of the lead wire 15 can be prevented.

[Seventh embodiment]
FIG. 21 shows a light emitting device according to a seventh embodiment of the present invention. In the seventh embodiment, the same reference numerals as those in the first to sixth embodiments denote the same or corresponding parts. As shown in the figure, the light-emitting device 1 extends linearly in the longitudinal direction, and is disposed on each of the tubular arc tube 2 having a substrate 10 on which the LED 11 is mounted, and both ends of the arc tube 2. And a base part 3 having a pair of pin terminals (electrodes) 30 detachably connected to an external socket part (not shown) at one end.

  A plurality of window holes 2g are formed through the outer periphery of both end portions of the arc tube 2 at predetermined intervals (preferably at equal intervals) on the circumference (see FIG. 22). On the other hand, as shown in FIG. 23, the base part 3 is a bottomed cylindrical member, and an incision 3s extending in the axial direction is formed at a position away from the axial center on the inner end face. A pair of protrusions 3g and an operation button (operation part) 3h are provided on the outer peripheral surface of the thin portion 3S partitioned by the cut 3s. Each projection 3g can be detachably engaged in the window hole 2g of the arc tube 2. In this engaged state, when the operation button 3h is pushed in the direction of the arrow in FIG. 22, the thin portion 3S bends downward, and as a result, each projection 3g is detached from the window hole 2g and the engaged state is released. Yes. Further, when the base part 3 is put on the small-diameter part 26 of the arc tube 2, the tip part of the small-diameter part 26 is detachably engaged with the engaging recess 3 j inside the base part 3.

  In the light emitting device 1 configured as described above, when changing the direction of irradiation light, first, a person presses the operation button 3h with a finger while the light emitting device 1 is fitted in an external socket (see FIG. 22). Then, the thin portion 3S bends toward the cut portion 3s, and each projection 3g is detached from the window hole 2g of the arc tube 2.

  From this state, the arc tube 2 is rotated around the base part 3 by a desired rotation angle. After the arc tube 2 is rotated by a desired rotation angle, when the finger is released from the operation button 3h, the elastically deformed thin-walled portion 3S returns to its original state, and each projection 3g of the base part 3 is connected to the arc tube 2. Engages with another window hole 2g.

  According to such a present Example, after operating the operation button 3h for forcibly releasing the engagement state of the protrusion 3g with respect to the window hole 2g, a person manually holds the arc tube 2 with respect to the base part 3. Since it is only necessary to rotate, the direction of the irradiation light of the light emitting device 1 can be easily changed. In addition, in this case, it is only necessary to rotate the arc tube 2, and it is not necessary to directly rotate the substrate 10 inside the arc tube, so that the direction of irradiation light can be safely operated. Furthermore, in this case, the protrusion 3g engages with the window hole 2g to set the rotational angle position of the arc tube 2 with respect to the base 3 and the protrusion 3g and the window hole 2g are not operated until the operation button 3h is operated. Thus, the rotation angle position once set is not easily displaced by vibration or the like, and the direction of the irradiation light can be changed reliably.

[Other Examples]
In each of the above-described embodiments, the arc tube has been described as an example that extends linearly in the longitudinal direction. However, the application of the present invention is not limited to this, and the arc tube may have a V-shape or a curved shape, A bent shape such as a W shape or a valve shape may be used. Alternatively, a single-piece arc tube having a cap portion disposed only at one end of the arc tube may be used.

  The present invention is suitable for a light-emitting device used for general illumination, and is particularly suitable for a light-emitting device provided with a light source having directivity such as an LED.

1: Light emitting device

2: Arc tube 2g: Window hole (engagement recess)
22: Ball (projecting part)
25: Hole (engagement recess)
27: Flange (rotation amount regulating means)
29: engagement hole (engagement recess)

3, 4: Base part (rotation angle position changing means)
3 ': Connecting tool (rotation angle position changing means)
3A, 4A: 1st nozzle | cap | die part (rotation angle position change means)
3B, 4B: 2nd nozzle | cap | die part (rotation angle position change means)
3f: Projection (rotation amount regulating means)
3g: Projection (projecting part)
3h: Operation button (operation unit)
30, 40: Pin terminal (electrode)
30C: Pin terminal (projecting part)
35: Ball (projecting part)
37, 37 ': Pin hole (engagement recess)
39: Projection (projection)

5: Rotation angle position change unit (rotation angle position change means)
52: Hole (engagement recess)

7: Pin assembly 70: Pin (projecting part)

8: Operation buttons (operation unit)

JP 2006-100036 A (see FIG. 4) Japanese Patent Laying-Open No. 2007-257928 (see FIGS. 1 and 2) JP 2007-122933 A (see FIG. 2)

Claims (3)

A light emitting device ,
A directional arc tube;
A base part disposed at least on one end side of the arc tube and having an electrode at one end which is detachably connected to an external socket part;
Wherein the arc tube is provided between the mouthpiece, and a rotational angular position changing means capable of changing the rotational angular position relative to the base part of the arc tube,
The rotation angle position changing means includes a plurality of balls arranged on a circumference on either side of the arc tube or the base and elastically biased in an axially projecting direction, and the arc tube or disposed on Oite circumference on the other side of the base part, the plurality of balls are composed of a plurality of engaging recesses engageable detachably engaged, formed in an end portion of the arc tube The base part is rotatably supported in the circumferential groove formed ,
A light emitting device characterized by that . In claim 1,
The engagement state of the ball with respect to the engagement recess is released by rotating the arc tube with respect to the base portion.
A light emitting device characterized by that. In claim 1 ,
The ball is electrically connected to the electrode;
A light emitting device characterized by that.

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