JP4480772B2 - Lamp fixture, lamp holder and socket of the lamp fixture - Google Patents

Description

  The present invention relates to a lamp fixture, and a lamp holder and socket constituting the lamp fixture. More specifically, the present invention relates to a xenon lamp, a mercury lamp, a metal halide lamp, etc., in which electrodes are provided at both ends of an arc tube filled with high-pressure gas. And a lamp holder and a socket constituting the lamp fixture. The lamp fixture is connected to the power supply device and is fixed in a predetermined posture, that is, a position and a vertical position of the outer periphery of the lamp in a predetermined horizontal plane.

  As an example of a high-pressure lamp in which high-pressure gas is sealed in an arc tube and electrodes are provided at both ends of the arc tube, a xenon lamp will be described as an example. As shown in FIG. The arc tube 51 has a structure in which the tips of the cathode tip 52 and the anode tip 53 are arranged to face each other with a gap (gap) of about 2 to 3 mm. The arc tube 51 is filled with xenon gas, and the anode tip 53 A lead (not shown) connected to is extended to the outside of the arc tube 51 at one end side (the upper end side in the illustrated example) of the arc tube 51, and a lead (not shown) connected to the cathode chip 52 in the arc tube 51 ( (Not shown) extends out of the arc tube 51 at the other end side (the lower end side in the illustrated example) of the arc tube 51 (see Patent Document 1), and leads are connected to both ends of the arc tube. Connect to the base 54 and 55 mounted as, respectively electrodes, by connecting the mouthpiece 54 and 55 with power supply and is configured to be capable of performing light emission by arc discharge in xenon gas.

  Note that reference numeral 56 in FIG. 9 is a protrusion generated by the remaining portion when the gas introduction path used when sealing the xenon gas into the arc tube 51 is sealed and removed. Reference numeral 57 denotes an end projecting portion which is formed with a small diameter with respect to the base 55 and forms the anode side end of the lamp 50.

  When the xenon lamp 50 configured as described above is mounted at a predetermined position in the lamp house 1, for example, the xenon lamp 50 is mounted in the vertical direction with the anode as the upper side, or the cathode chip 52 and the anode chip 53 are in the horizontal direction. If both of the electrodes provided on both ends of the arc tube 51 are fixed due to expansion of the arc tube 51 due to heat generation during the lighting of the lamp 50, both of the electrodes of the arc tube 51 are fixed. Since the lamp 50 may be damaged without being able to absorb the thermal expansion, the lamp 50 is attached by fixing only one of the end portions.

  As an example, the example shown in FIG. 10 is an example in which the base 55 on the anode side of the xenon lamp 50 is fixed and vertically installed in the lamp house 1, and the opening 2 b is formed in the top plate 2 a of the lamp house 1. At the same time, a cap 3 is provided to cover the opening 2b from above, and a lamp fixture 70 for attaching the base 55 on the anode side of the xenon lamp 50 is attached to the back surface of the cap 3. By fixing the base 55 on the anode side of the xenon lamp 50 and attaching the xenon lamp 50 in a state where it is suspended from the top plate 2a portion of the lamp house 1, the light emitting part of the xenon lamp 50 is attached to the rear mirror 5 and the condenser lens. 7 is configured to be arranged at a predetermined position between the seven.

  As described above, the lamp fixture 70 not only supports the anode-side base 55 of the lamp 50 to fix the lamp 50 in a predetermined posture, but also connects the anode-side base 55 to the power supply device. For example, as shown in FIGS. 11A and 11B, a socket 80 having a substantially cylindrical fitting portion 82 formed at the center of an annular flange portion 81 is formed. And a lamp holder 90 having a hollow bulging portion 92 that can be fitted in the fitting portion 82 of the socket 80 at the center of the annular flange portion 91 and connected to the power supply device. The socket 80 is attached to the cap 3 and the anode 55 of the xenon lamp 50 is inserted into the hollow space 93 formed in the bulging portion 92 of the lamp holder 90 so that the run The holder 90 is attached to the xenon lamp 50, and in this state, the bulging portion 92 of the lamp holder 90 is inserted into the fitting portion 82 of the socket 80 until the flange portions 81 and 91 of both the holders 80 and 90 come into contact with each other. The lamp 50 is attached to the cap 3 by rotating the knurled screw 94 provided in the flange portion 91 of the lamp holder 90 and screwing the tip of the knurled screw 94 into the screw hole 83 formed in the flange portion 81 of the socket 80. In addition, the electric connection between the base 55 on the anode side of the lamp 50 and the power supply device can be performed.

  The cap 3 is provided with an adjustment mechanism that enables the lamp 50 mounted via the lamp fixture 70 to move forward and backward in the longitudinal direction and rotate in the circumferential direction around the longitudinal direction. Accordingly, the position of the light emitting portion of the lamp 50 in the lamp house 1, that is, “LCD” (Light Center Distance: the center of the gap between the cathode chip 52 and the anode chip 53 and the anode side base 55) The distance) is configured to finely adjust the vertical position and the positioning of the projection 56.

Prior art document information of the present invention includes the following.
JP 2006-80016 A

  In the lamp fixture 70 described with reference to FIGS. 10 to 12, the lamp fixture 70 is separated into the socket 80 and the lamp holder 90, and the socket 80 is attached to the cap 3 in advance. At the same time, by attaching the lamp holder 90 to the base 55 on the anode side of the lamp 50 in advance, the lamp 50 can be replaced by a relatively simple operation of attaching the lamp holder 90 to the socket 80. It has become a thing.

  However, the lamp fixture 70 not only fixes the lamp 50 as described above, but also has a function of connecting one base (in the illustrated example, the base 55 on the anode side) to the power supply device. However, in the lamp fixture 70 having the structure described with reference to FIGS. 10 to 12, the bulging portion 92 provided in the lamp holder 90 is in the fitting portion 82 provided in the socket 80. The outer diameter of the lamp holder 90 is slightly smaller than the inner diameter of the fitting portion 82 of the socket 80 so that it can be securely inserted. In the state inserted in (see FIG. 12), a slight gap δ is generated between the outer periphery of the bulging portion 92 and the inner periphery of the fitting portion 82.

  Therefore, in the lamp fixture 70 having the above-described configuration, the flanges 81 and 91 are provided on the lamp holder 90 and the socket 80 as described above, and it is necessary to ensure electrical contact by the contact between the flanges 81 and 91. In order to reduce the electrical resistance generated at the contact portion between the lamp holder 90 and the socket 80, it is necessary to form the flanges 81 and 91 in a relatively large area in order to secure a large contact area. The entire 70 becomes larger.

  Further, since there is a slight gap δ between the inner wall of the fitting portion 82 of the socket 80 and the outer wall of the bulging portion 92 of the lamp holder 90, a horizontal gap is present between the socket 80 and the lamp holder 90. It is difficult to make the socket 80 and the center of the lamp holder 90 completely coincide with each other, and as a result, the center of the lamp 50 attached to the lamp holder 90 is also arranged in an accurate position. Difficult to do.

  Further, in the lamp fixture 70 described with reference to FIGS. 10 to 12, the lamp holder 90 is inserted into the socket 80 until the tightening of the plurality of knurled screws 94 provided on the flange portion 91 of the lamp holder 90 is completed. The lamp holder 90 remains in the fitting portion 82 of the socket 80 until the tightening of the knurled screw 94 is completed. It is necessary to support the lamp holder 90 so as to maintain the state of being inserted into the lamp holder. However, if the lamp holder 90 is released due to an out of hand or the like, the lamp 50 will drop together with the lamp holder 90 and the expensive lamp 50 may be broken, and if the lamp 50 is cracked, the arc tube 51 broken by the internal gas pressure may scatter.

  Further, as described with reference to FIG. 9, the high-pressure lamp 50 such as a xenon lamp has a projection 56 formed by a remaining portion of the gas introduction path at a part of the arc tube 51. Then, since the transmissivity of the arc tube 51 is lowered, depending on the orientation of the projection 56 with respect to the arrangement of the rear mirror 5 and the condenser lens 7 disposed in the lamp house 1, There is a case where the output of the irradiation light emitted from the lamp house 1 is lowered. Therefore, it is necessary to adjust so that the projection 56 is arranged at a position where the output is not reduced by rotating the lamp 50 by the adjusting mechanism provided in the cap 3 described above. Such adjustment is complicated.

  Accordingly, the present invention has been made to solve the above-described disadvantages of the prior art, and it is possible to reduce the electrical resistance by increasing the contact area between the lamp holder and the socket while forming it as small as possible. The socket and the lamp holder can be easily centered (the vertical position of the LCD and the projection 56), and the lamp holder can be temporarily fixed in the socket by inserting the lamp holder into the socket. It is an object of the present invention to provide a lamp fixture having a structure that facilitates alignment between a socket and a lamp holder and a structure that facilitates fixing of the lamp holder to the socket.

  In the following, means for solving the problems will be described by reference numerals in the best modes and embodiments for carrying out the invention. This symbol is for clarifying the correspondence between the description of the claims and the description of the best mode for carrying out the invention / examples, and of course, the technology of the claims of the present invention. It is not used to limit the interpretation of the scope.

In order to achieve the above object, the lamp fixture 10 of the present invention connects a lamp 50 having electrodes at both ends of an arc tube 51 filled with high-pressure gas to a power supply device, and holds the lamp 50 in a predetermined posture. With respect to the lamp fixture 10 fixed with
A lamp holder 30 fitted on the electrode portion on one end side of the lamp 50;
A socket connected to a power supply device (not shown) that includes the fitting portion 22 having a shape corresponding to the outer shape of the lamp holder 30 and fixes the lamp holder 30 inserted into the fitting portion 22 20 and
A bulging portion 31 (cylindrical member in the embodiment) inserted into the socket 20 of the lamp holder 30 is provided with a tapered portion 31b whose width is narrowed toward the front in the insertion direction, and a tip portion extending from the tapered portion 31b. 31a (cylindrical member in the embodiment) is provided, and a locking groove 35 is formed on the outer surface of the tip portion 31a.
In the fitting portion 22 of the socket 20, a tapered portion 22b having the same angle as the tapered portion 31b of the lamp holder 30, and a distal end insertion portion 22a (in the embodiment) in which the distal end portion 31a of the lamp holder 30 can be fitted freely. (Cylindrical member) is provided, and the lamp holder 30 is provided in the fitting portion 22 of the socket 20 so as to be elastically engageable (Claim 1).

  A locking body that is locked to the fitting portion 22a of the socket 20 in a locking groove 35 formed in a direction orthogonal to the axial direction of the tip portion 31a of the lamp holder 30, in the embodiment of the ball plunger 26 If the spherical body 26b is elastically projected and the lamp holder 30 is provided in the fitting portion 22 of the socket 20 so as to be elastically engageable, temporary fixing and positioning of the vertical position of the lamp light source are possible. (Claim 2).

  In the lamp fixture 10 having the above-described configuration, the key groove 36 is formed in the length direction of the tip portion 31a of the lamp holder 30 and the inner wall of the tip insertion portion 22a provided in the fitting portion 22 of the socket 20 is formed. If the key 24 that engages with the key groove 36 (in the embodiment, the tip of the key groove guide screw 24) protrudes, it is suitable for positioning the horizontal position of the lamp light source.

  Further, in the lamp fixture 10 having the above-described configuration, a fixing tool 28 that is externally fitted to the socket 20 at the insertion side end of the lamp holder is detachably attached to the lamp holder 33 formed on the outer periphery of the lamp holder 30. Can be provided. In the embodiment of the present invention, a male screw 34 is formed on the outer periphery of the lamp holder 33 formed on the outer periphery of the lamp holder 30, and a female screw 29 screwed with the male screw 34 is formed on the inner peripheral surface. The fixing tool 28 made of a ring-shaped member may be externally fitted to the socket 20 at the insertion side end of the lamp holder 30 (Claim 4).

  Further, the lamp holder 30 of the present invention has an electrode on one end side of the lamp 50 when the lamp 50 having electrodes provided at both ends of the arc tube 51 filled with high-pressure gas is attached to the socket 20 connected to the power supply device. A lamp holder 30 that is externally fitted to a portion and is inserted into the fitting portion 22 having the taper portion 22b of the socket 20, and has an outer shape corresponding to the shape in the fitting portion 22 of the socket 20. The tapered portion 31b having the same angle as the tapered portion 22b of the socket 20 that narrows the width toward the front in the insertion direction, and the tip portion extending from the tapered portion are inserted into the bulged portion 31 inserted into the fitting portion. A locking groove 25 having a predetermined length for locking a locking body elastically protruding from the inner wall of the fitting portion 22 of the socket 20 is provided at the tip, for example, in the width direction thereof. Features (Claim 5).

  In the lamp holder 30 having the above-described configuration, a key groove 36 that engages with a key protruding from the inner wall of the fitting portion 22 of the socket 20 can be provided in the length direction of the tip portion 31a ( Claim 6).

Furthermore, the socket 20 of the present invention is intended for attachment to a lamp 50 having electrodes provided at both ends of an arc tube 51 filled with high-pressure gas, and a tapered portion 31b that is externally fitted to an electrode portion on one end side of the lamp 50. A socket 20 to which the lamp 50 is mounted by receiving and fixing the lamp holder 30 in the fitting portion 22.
In the fitting portion 22, a tapered portion 22b having the same angle as the tapered portion 31b of the lamp holder 30 that narrows the width toward the front in the insertion direction of the lamp holder 30, and a tip insertion portion 22a extending from the tapered portion are provided. And is formed in an internal shape corresponding to the outer shape of the lamp holder 30 and elastically engages a locking body locked in a locking groove 35 formed in the lamp holder 30 from the inner wall of the tip insertion portion. (7).

  In the socket 20 having the above-described configuration, a key that engages with a key groove 36 formed in the lamp holder 30 may be protruded from the inner wall of the tip insertion portion.

  From the configuration of the lamp holder 30 and the socket 20 having the above-described configuration, the following remarkable effects can be obtained by fixing the lamp 50 with the lamp fixture 10 that combines both.

  By forming the aforementioned tapered portion 31b in the lamp holder 30 and forming the tapered portion 22b having the same angle as that of the tapered portion 31b in the fitting portion 22 of the socket 20, the lamp By simply inserting the holder 30 into the fitting part 22 of the socket 20, the taper part 31b of the lamp holder 30 is guided by the inner wall of the taper part 22b formed in the fitting part 22 of the socket 20, and both the holders 20, Thus, the center of the lamp 30 can be accurately aligned, so that the center of the lamp 50 attached to the lamp holder 30 can also be accurately arranged at a desired position.

  Further, since the contact between the lamp holder 30 and the socket 20 is made with the tapered surface, it is compared with the case where the contact is made with the flange-like surface (horizontal surface) like the lamp fixture 70 described with reference to FIGS. Thus, it is possible to secure a wide contact area while suppressing the spread of the lamp holder 30 and the socket 20 in the outer peripheral direction, and to reduce the electric resistance generated at the contact portion of the lamp holder 30 and the socket 20. .

  A locking groove 35 is formed in the tip portion 31 a provided in the lamp holder 30, a tip insertion portion 22 a for receiving the tip portion 31 a is provided on the inner periphery of the fitting portion 22 of the socket 20, and the locking groove 35 is provided in the locking groove 35. In the configuration in which the locking body 26b to be locked is provided, when the lamp holder 30 is inserted to a predetermined position in the fitting portion 22 of the socket 20, the locking body 26b is engaged in the locking groove 35. The lamp holder 30 can be temporarily fixed in the fitting portion 22 of the socket 20 and the hand is accidentally released from the lamp holder 30 during the mounting operation of the lamp holder 30 to the socket 20. In addition, the lamp holder 30 and the lamp 50 attached thereto can be prevented from falling.

  Further, in the lamp fixture 10 having the above-described configuration, the operator perceives the sound and impact generated when the locking body 26b is locked in the locking groove 35, so that the lamp holder 30 is connected to the socket. 20 can be confirmed to be securely inserted to a predetermined position in the fitting portion 22, and the engaging portion 26b is elastically attached. By strongly pulling out the lamp holder 30 inserted in 22, it is possible to overcome the urging force of the spring 26c and the like so that the locking body (sphere 26b) can be retracted and removed from the groove 35. In addition, the lamp could be removed without any problem.

  A key groove 36 is formed in the length direction of the tip portion 31a of the lamp holder 30, and a key that engages with the key groove 36 is projected from the inner wall of the tip insertion portion 22a of the socket 20. By inserting the lamp holder 30 into the fitting portion 22 of the socket 20 so that the key (the tip of the guide screw 24) engages with the key groove 36, the lamp holder 30 is placed in a predetermined direction with respect to the socket 20. I was able to install it.

  As a result, for example, the lamp 56 is simply attached to the lamp 50 so that the projection 56 of the lamp 50 is in a predetermined arrangement in relation to the key groove 36, and the projection 56 does not cause a shadow on the output light. The lamp 50 could be mounted in the lamp house 1 or the like so as to be in the position.

  Further, for example, a fixing member 28 made of a ring-shaped member having an internal thread 29 formed on the inner peripheral surface thereof is externally fitted to the socket 20 (the main body portion 21 of the socket 20). A male screw 34 is formed on the surface to be engaged with the female screw 29 of the fixing tool 28. When the lamp holder 30 is inserted into the fitting portion 22 of the socket 20, the fixing tool 28 causes the lamp holder 30, When the socket 20 was made detachable, the fixing work between the lamp holder 30 and the socket 20 could be easily performed only by tightening the fixing tool 28 made of a single ring-shaped member.

  Next, embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 to 3, reference numeral 1 denotes a lamp house provided with the lamp fixture 10 of the present invention. The lamp fixture 10 provided on the top plate 2 a side of the lamp house 1 connects the electrode on the anode side of the lamp 50. The lamp 50 can be mounted in a state where the lamp 50 is suspended in the lamp house 1.

  In the illustrated embodiment, the lamp fixture 10 is attached to the back surface of the cap 3 that closes the opening 2b formed in the top plate 2a of the cover 2 of the lamp house 1, and the cap 3 is removed from the opening 2b. Can do.

  In the illustrated embodiment in which the lamp 50 is attached to the back surface of the cap 3 via the lamp fixture 10 as described above, the socket 20 (see FIG. 4) attached to the back surface of the cap 3 and the lamp 50 It is formed by a combination of a lamp holder 30 (see FIG. 5) attached to one end side, and the lamp 50 can be exchanged by making the lamp holder 30 removable from the socket 20. The configuration is the same as that of the lamp fixture 70 described with reference to FIGS.

  In the following example, the case where the lamp fixture 10 is attached to the back surface of the cap 3 will be described as an example. However, the present invention is not limited to this configuration. For example, the socket 20 of the lamp fixture 10 is provided in the lamp house 1. The lamp house 1 is opened by removing the cover 2 or by fixing the cover 2 to the socket 2 or by the door provided on the cover 2, and the lamp holder 30 can be attached to and detached from the socket 20 in this state to replace the lamp 50. The specific application to the lamp house 1 and the like is not limited to the illustrated embodiment, and various configurations can be adopted.

  The aforementioned lamp holder 30 attached to one end of the lamp 50 is, as shown in FIGS. 5 (A) to 5 (D), when connected to the socket 20 described later, the fitting portion 22 provided in the socket 20. It has a cylindrical bulging portion 31 to be inserted therein, and is provided with a lamp insertion hole 32 for inserting one end of the lamp 50, and one end of the lamp 50 (on the anode side) in the lamp insertion hole 32. By inserting and fixing the end portion), the lamp 50 can be attached to the end of the lamp 50.

  As shown in FIG. 1, a lamp 50 to be mounted includes a base 55 on one end (anode end) side and an end protrusion 57 formed with a small diameter with respect to the base 55. In the configuration of the present embodiment, the lamp insertion hole 32 is formed as a through hole, and the lamp holder 30 is formed in a cylindrical shape as a whole, but the anode side end of the lamp 50 is the end described above. The lamp insertion hole 32 does not necessarily have to be formed as a through-hole depending on its shape, such as having no projecting part, but any shape that can accommodate the base 55 portion by inserting the anode side end of the lamp 50 is illustrated. It is not limited to the shape of the embodiment.

  In the illustrated embodiment, the lamp insertion hole 32 has an inner diameter corresponding to the diameter of the base 55 provided on the anode of the lamp 50 from the end on the receiving side of the lamp 50 to a predetermined length. A large diameter portion 32a having a small diameter with respect to the large diameter portion 32a that receives the end protrusion 57 of the lamp 50 on the distal end side in the insertion direction of the lamp insertion hole 32. When the portion 32b is formed and the anode of the lamp 50 is inserted into the lamp insertion hole 32, the base 55 portion at the anode side end portion of the lamp 50 comes into contact with the inner periphery of the large diameter portion 32a to make electrical contact. Configured to be able to do.

  The lamp holder 30 protrudes from the tubular bulging portion 31 inserted into the fitting portion 22 of the socket 20 and the fitting portion 22 of the socket 20 without being inserted into the fitting portion 22. A ramp holding portion 33 is provided, and the bulging portion 31 is provided with a truncated conical tapered portion 31b that narrows the width toward the distal end in the insertion direction of the bulging portion 31, and at the distal end portion of the tapered portion 31b, A tip end portion 31a formed with a constant diameter corresponding to the diameter of the end portion on the narrow diameter side of the tapered portion is provided.

  The lamp holding portion 33 is formed in a cylindrical shape having a slightly larger diameter than the end portion on the large diameter side of the tapered portion 31b, and the outer periphery of the lamp holding portion 33 has a boundary with the tapered surface. A male screw 34 is formed in a predetermined range on the side.

  The aforementioned distal end portion 31a formed on the distal end side of the bulging portion 31 is formed with a locking groove 35 formed annularly in the circumferential direction of the distal end portion 31a and in the length direction of the distal end portion 31a. Each keyway 36 is formed.

  In FIGS. 5B and 5C, reference numeral 37 denotes a screw hole. The screw hole 37 is formed as a through hole penetrating from the outer periphery of the lamp holding portion 33 formed in a cylindrical shape into the lamp insertion hole 32. The lamp fixing screw 38 is screwed into the screw hole 37 from the outer peripheral side toward the inner peripheral side, whereby the base 55 of the lamp 50 inserted into the lamp insertion hole 32 is pressed by the tip of the fixing screw 38. Thus, the anode side end of the lamp 50 inserted into the lamp insertion hole 32 is prevented from falling out of the lamp insertion hole 32.

  With respect to the lamp holder 30 configured as described above, the above-described socket 20 connected to the lamp holder 30 is bulged on the lamp holder 30 as shown in FIGS. 4 (A) to (D). A main body portion 21 having a fitting portion 22 capable of receiving the portion 31 and a fixing tool 28 made of a ring-shaped member externally fitted to the main body portion 21 are provided.

  The fitting portion 22 formed on the main body portion 21 of the socket 20 has an internal shape corresponding to the bulging portion 31 of the lamp holder 30 described above, and the tip formed on the bulging portion 31 of the lamp holder 30. A cylindrical tip insertion portion 22a formed with a constant width to which the portion 31a is fitted, and a tapered portion 22b extending from the end of the tip insertion portion 22a to the opening end of the fitting portion 22 are formed. The slope of the inner wall surface of the taper portion 22b is made to coincide with the slope of the taper portion 31b provided on the bulge portion 31 of the lamp holder 30, whereby the bulge of the lamp holder 30 is inserted into the fitting portion 22 of the socket 20. When the portion 31 is inserted, the outer periphery of the tapered portion 31 b of the lamp holder 30 is configured to be joined to the inner wall of the tapered portion 22 b of the fitting portion 22.

  In the illustrated embodiment, the fitting portion 22 of the socket 20 is also formed as a through hole corresponding to the shape of the end portion on the anode side of the illustrated lamp 50 provided with the end protruding portion 57. Depending on the shape of the anode side end of the lamp 50 to be used, it is not always necessary to form the through hole.

  Further, the bulging portion 31 of the holder 30 and the tapered portions 31b and 22b in the socket 20 fitting portion 22 are respectively formed in a truncated cone shape of the same angle, but are not limited to this. The shape of a rectangular cross section having a taper of the same angle on a plurality of surfaces, for example, a cut-out arcuate cylindrical body having a tapered portion on one surface, or a polygonal pyramid such as a triangular pyramid, can be appropriately selected.

  The main body portion 21 of the socket 20 is formed with three screw holes 23, 25, 27 that penetrate the wall thickness at the tip insertion portion 22 a of the fitting portion 22. By inserting the leading end of the combined key groove guide screw 24 into the key groove 36 formed in the leading end portion 31a of the lamp holder 30, the bulging portion 31 of the lamp holder 30 with respect to the fitting portion 22 of the socket 20 is inserted. It is comprised so that alignment of the insertion position of can be performed easily.

  As an example, the screw hole 25 of the remaining screw holes 25 and 27 includes a sphere 26b and a spring 26c for urging the sphere 26b in a cylinder 26a having a male screw formed on the outer periphery as shown in FIG. The ball plunger 26 provided with a screw is screwed so that the sphere 26b of the ball plunger 26 protrudes elastically from the inner wall of the distal end insertion portion 22a of the fitting portion 22, and the lamp holder 30 is inserted into the fitting portion 22 of the socket 20. When the bulging portion 31 is inserted, the spherical body 26 b is locked in the locking groove 35 formed in the tip portion 31 a of the lamp holder 30, so that the lamp holder 30 is inserted into the fitting portion 22 of the socket 20. Both are configured to be temporarily fixed in a state where the bulging portion 31 is inserted.

  The spherical body 26b provided on the ball plunger 26 is biased in the direction of being pushed out from the cylinder 26a by the biasing force of the spring 26c, and by appropriately adjusting the depth of the groove 35 and the diameter of the spherical body 26b, When the lamp holder 30 is pulled out more strongly than the socket 20, the sphere 26 b moves backward against the biasing force of the spring 26 c described above, and the bulging portion 31 of the lamp holder 30 can be pulled out from the fitting portion 22 of the socket 20. The lamp 50 to be replaced can be easily removed prior to the replacement of the lamp 50.

  In the illustrated embodiment, the ball plunger 26 configured as shown in FIG. 7 is screwed into the screw hole 25 provided in the main body portion 21 of the socket 20, but the screw hole 25 itself The cylinder may be configured to accommodate a locking body such as a sphere that is locked to the groove 35 and a biasing means such as a spring directly in the screw hole. It is not limited to the sphere as shown in FIG. 7, and various shapes can be used.

  The remaining screw hole 27 provided in the main body portion 21 of the socket 20 is a screw hole for attaching a power cable connected to the power supply device. When the terminator or the like attached to the end of the power cable is screwed, Used for.

  A fixing tool 28 made of a cylindrical ring-shaped member is rotatably fitted on the main body portion 21 of the socket 20 configured as described above, and the vicinity of the opening edge of the fitting portion 22 extends in the outer circumferential direction. A step 21a is formed by projecting, and one inner peripheral edge of the fixing tool 28 is protruded in the inner peripheral direction to form a flange 28a that engages with the step 21a. 20 It is configured so that it cannot be removed from the outer periphery of the main body portion 21.

  Then, a female screw 29 is formed on the inner periphery of the predetermined range on the other end side of the fixing tool 28 to be engaged with the male screw 34 formed on the outer periphery of the lamp holding portion 33 of the lamp holder 30. The lamp holder 30 can be fixed to the socket 20 by screwing.

  In the lamp fixture of the present invention configured as described above, of the lamp holder 30 and the socket 20 constituting the lamp fixture 10, the lamp holder 30 described above is connected to the end of the high-pressure lamp 50 on the anode side. Install and use [see FIG. 6 (A), (B)].

  The lamp holder 30 may be attached to the anode side end of the lamp 50 by the user. For example, the lamp holder 30 is attached to the anode side end of the lamp 50 before shipping. In this way, it is possible to prevent the polarity of the lamp 50 from being reversed. In this case, it is convenient for the user to replace both the lamp 50 and the lamp holder 30 when replacing the lamp.

  The lamp holder 30 is attached to the lamp 50 in such a manner that the formation position of the projection 56 formed on the arc tube 51 of the lamp 50 and the position of the key groove 36 provided on the tip portion 31a of the lamp holder 30 are in a predetermined arrangement. Attach as shown.

  The key groove 36 provided at the tip 31a of the lamp holder 30 is attached to the socket 20 so as to face the same direction as the light irradiation direction by the lamp house 1 in plan view as shown in FIG. In this case, the key groove 36 is formed so that the formation position of the key groove 36 and the arrangement of the protrusions 56 are 90 ° or 270 ° around the axis of the lamp holder 30 and the lamp 50. The end of the anode side of the lamp 50 is inserted therein and fixed by tightening the fixing screw 38.

  In this manner, the lamp holder 30 attached to the anode side end of the lamp 50 is inserted into the fitting portion 22 of the socket 20 attached to the cap 3, and the guide screw 24 is inserted into the key groove 36 provided at the tip 31 a. The bulging portion 31 is inserted so that the tip end portion of the lamp holder 30 is fitted, and is inserted until the ball plunger 26 provided on the socket 20 is locked in the locking groove 35 provided on the tip end portion 31 a of the lamp holder 30.

  The user who performs the mounting operation of the lamp 50 hears the locking sound when the ball 26b of the ball plunger 26 is locked in the locking groove 35 provided in the cylindrical column part 31a of the lamp holder 30, or the locking It is possible to feel the impact at the time, and thereby it can be recognized that the cylindrical bulging portion 31 of the lamp holder 30 has been inserted to a predetermined position, and the spherical body 26b of the plunger 26 is connected to the locking groove 35. , The lamp holder 30 can be temporarily fixed to the socket 20, so that even if the lamp holder 30 is accidentally released during the replacement operation of the lamp 50, the lamp 50 is dropped. Can be prevented.

  In this way, with the cylindrical bulging portion 31 of the lamp holder 30 inserted into the fitting portion 22 of the socket 20, the female screw 29 of the fixing tool 28 made of a ring-shaped member provided on the socket 20, The male screw 34 provided on the outer periphery of the lamp holding portion 33 of the lamp holder 30 is screwed to complete the connection between the two.

  By fastening between the lamp holder 30 and the socket 20 by the fixing tool 28, the taper portion 31b provided in the tubular bulging portion 31 of the lamp holder 30 and the taper portion 22b provided in the fitting portion 22 of the socket 20 are in pressure contact, The center of the lamp holder 30 and the socket 20 can be accurately aligned without adjustment or the like, and no shakiness occurs in the horizontal direction. As a result, the axial direction of the lamp 50 is accurately centered. Can be placed in position.

  Further, since the contact between the lamp holder 30 and the socket 20 is made by the tapered portions 22b and 31b, the contact area can be made relatively large, and thereby the electric resistance generated at the joint portion between them can be reduced.

  In this way, the lamp holder 30 and the socket 20 are connected.

  When a fine adjustment is required for the arrangement of the lamp 50 in the lamp house 1, this is adjusted by the adjusting means provided in the cap 3, thereby completing the lamp replacement.

  As described above, according to the lamp fixture 10 of the present invention, the lamp 50 can be easily mounted in the lamp house 1 so that the axial center of the lamp 50 and the projection 56 are oriented so as not to cause a shadow. In addition, the lamp 50 can be prevented from falling even if the hand is accidentally released from the lamp holder 30 by the above-described temporary fixing function, and the lamp holder 30 and the socket 20 which are in contact with each other by the tapered surfaces 31b and 22b. By making the contact between the two, not only the center of both is accurately aligned, but the contact area between the two can be made relatively large by the contact between the tapered surfaces. The electric resistance generated at the contact portion could be reduced as much as possible.

The front sectional view of the lamp house provided with the lamp fixture of the present invention. The right side sectional view of the lamp house provided with the lamp fixture of the present invention. The top view of the lamp house provided with the lamp fixture of this invention. It is a socket of the present invention, (A) is a plan view, (B) is a right side view, (C) is a sectional view taken along line CC of (B), and (D) is a bottom view. It is a lamp holder of the present invention, (A) is a plan view, (B) is a right side view, (C) is a sectional view taken along the line CC of (B), and (D) is a bottom view. It is a lamp fixture with the lamp attached, (A) is a right side cross-sectional view, and (B) is a front cross-sectional view. It is explanatory drawing of a ball plunger, (A) is front sectional drawing, (B) is a left view. Explanatory drawing explaining the positional relationship of the keyway of a lamp holder, and the protrusion of a lamp | ramp. Explanatory drawing of a xenon lamp. Front sectional drawing of the lamp house provided with the conventional lamp fixture. It is a conventional lamp fixing tool, (A) is a front exploded view, (B) is a sectional view taken along line BB of (A). Sectional drawing of the assembly state of the conventional lamp fixture.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lamp house 2 Cover 2a Top plate 2b Opening 3 Cap 5 Back mirror 7 Condenser lens 10 Lamp fixture (this application)
20 Socket (this application)
21 body part 21a step part 22 fitting part 22a tip insertion part 22b taper part 23 screw hole (screw guide screw of keyway is screwed together)
24 Guide screw for keyway 25 Screw hole (for plunger)
26 Plunger (ball plunger)
26a Cylinder 26b Locking body (sphere)
26c Spring 27 Screw hole (for power cable attachment)
28 Fixing tool 28a Flange 29 Female screw 30 Lamp holder 31 Protruding part 31a Tip part 31b Taper part 32 Lamp insertion hole 32a Large diameter part 32b Small diameter part 33 Lamp holding part 34 Male screw 35 Locking groove 36 Key groove 37 Screw hole (For lamp fixing screw)
38 Lamp fixing screw 50 High pressure lamp (xenon lamp)
51 arc tube 52 cathode tip 53 anode tip 54 base (cathode side)
55 Base (Anode side)
56 Projection 57 End projection 70 Lamp fixture (conventional)
80 socket (conventional)
81 Flange part 82 Fitting part 83 Screw hole 90 Lamp holder (Conventional)
91 Flange 92 Expanded 93 Space 94 Knurled Screw

Claims (8)

In a lamp fixture for connecting a lamp having electrodes provided at both ends of an arc tube filled with high-pressure gas to a power supply device and fixing the lamp in a predetermined posture,
A lamp holder fitted around an electrode portion on one end of the lamp;
It has a fitting part for inserting and fixing the lamp holder, and is composed of a socket connected to the power supply unit
The bulging portion to be inserted into the socket of the lamp holder is provided with a tapered portion that narrows toward the front in the insertion direction and a tip portion extending from the tapered portion, and a locking groove is formed on the outer surface of the tip portion. As well as
In the fitting portion of the socket, a taper portion having the same angle as the taper portion of the lamp holder and a tip insertion portion capable of fitting the tip portion of the lamp holder are provided, and the fitting portion of the socket is provided with: A lamp fixture, wherein the lamp holder is provided so as to be elastically engageable.   A locking body that is locked in a locking groove formed in a direction perpendicular to the axial direction of the tip end portion of the lamp holder is elastically provided on the fitting portion of the socket, and the socket 2. The lamp fixture according to claim 1, wherein the lamp holder is provided on the fitting portion so as to be elastically engageable.   A key groove is formed in the length direction of the tip portion of the lamp holder, and a key that engages with the key groove is provided on the inner wall of the tip insertion portion provided in the fitting portion of the socket. The lamp fixture according to claim 1, characterized in that:   2. The lamp fixing unit according to claim 1, wherein a fixing tool that is externally fitted to the socket at an insertion side end of the lamp holder is detachably provided on a lamp holding part formed on an outer periphery of the lamp holder. Ingredients. When attaching a lamp having electrodes provided at both ends of an arc tube filled with high-pressure gas to a socket connected to a power supply device, the lamp is fitted on the electrode portion on one end side of the lamp and inserted into the fitting portion of the socket. A lamp holder,
The bulging part inserted into the fitting part of the socket is provided with a taper part that narrows the width toward the front in the insertion direction and a tip part extending from the taper part, and the fitting of the socket is provided at the tip part. A lamp holder characterized in that a locking groove is provided that can be locked by a locking body that is elastically projected from the inner wall of the mounting portion.   6. The lamp holder according to claim 5, wherein a key groove is provided in the length direction of the tip portion to engage with a key protruding from the inner wall of the fitting portion of the socket. A lamp with electrodes provided at both ends of the arc tube filled with high-pressure gas is to be mounted, and a lamp holder having a tapered portion externally fitted to the electrode portion on one end side of the lamp is received and fixed in the fitting portion. In the socket where the lamp is mounted,
A taper portion having the same angle as the taper portion of the lamp holder that narrows the width toward the front in the insertion direction of the lamp holder and a tip insertion portion extending from the taper portion are provided in the fitting portion. A socket characterized in that a locking body that is locked in a locking groove formed in the lamp holder is elastically projected from an inner wall.   The socket according to claim 7, wherein a key that engages with a key groove formed in the lamp holder protrudes from an inner wall of the tip insertion portion.

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