JPH0219422Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a light bulb case.

[Prior Art] Generally, light bulbs used as light sources in various optical devices are equipped with a glass envelope, so there is always a possibility that they will be damaged, and especially because they have a large light output. High-pressure xenon short arc discharge lamps, which are suitably used as light source bulbs for movie projectors, projectors, printing machines, etc., have high internal pressure, so breakage of the glass envelope inevitably causes the glass to burst. It is extremely dangerous as it will scatter in all directions.

Conventionally, in order to avoid such a danger, for example, a high-pressure xenon short arc discharge lamp 1 as shown in FIG. formed,
For example, the discharge lamp 1 may be stored in a storage container 3 made of a cushioning material such as halved polystyrene foam so that it does not move around, or the discharge lamp 1 may be inserted into a cylindrical case 4 as shown in FIG. The discharge lamp 1 is housed in such a manner that the protruding pin 6 protruding from the end base 5 is positioned within the hole 8 formed in the end plate 7 of the case 4, and the discharge lamp 1 is transported and stored in this state. ing.

By using the storage container 3 or case 4 as described above, it is possible to avoid the risk of bulb explosion during transportation and storage, but when the light source bulb is installed in an optical device, the light source bulb is It is not possible to prevent accidents due to explosions that may occur at this time.

For example, as shown in FIG. 7, when the discharge lamp 1 is disposed in a light source bulb installation area in a projector where a reflector 9 and a light bulb holder 10 are provided, the discharge lamp 1 is placed in a storage container as described above. Alternatively, remove the naked state from the case 4, etc., insert the discharge lamp 1 by hand into the through opening 11 of the reflector 9 from the front, and insert the protruding pin 6 into the mounting hole 12 of the light bulb holder 10.
The discharge lamp 1 is installed by screwing it into the inside, but since the discharge lamp 1 is exposed during this process, there is a very high risk of it bursting, and moreover, the light source bulb is not installed. The area is usually narrow, and the discharge lamp 1 is likely to collide with various parts of the projector, so there is a great possibility that it will explode.

For this reason, as shown in FIG. 8 A and B, the interior of the plastic cylindrical case 13 is a small case corresponding to the size of the discharge lamp 1 and is configured to be split into two along the axial direction. The discharge lamp 1 is housed in such a way that its end base 5 protrudes outward from the end of the case 13, and the small diameter parts 14 and 15 at both ends are connected to one case part 18 and the other part by snap springs 16 and 17 or an E-ring. Case part 19
A light bulb case has been proposed in which the discharge lamp 1 is held within the case 13 by being pressed together.

[Problem that the invention attempts to solve]

In the case 13 having such a configuration, the case 13 is small, and the end base 5 is similar to the case 1.
Since the discharge lamp 1 is housed in the case 13 with the end of the lamp 3 protruding outward, the discharge lamp 1 is housed in the case 13.
The discharge lamp 1 can be installed by placing it in the light source bulb installation area while it is housed inside the case. 13, it is difficult to manually remove the snap springs 16 and 17, which are separate from the case 13, and in some cases, excessive force may be applied to the discharge lamp 1, causing damage to the discharge lamp 1. There are things to do. This arrangement of light source bulbs is something that general users frequently do to replace light source bulbs, and even if the utmost care is taken, there is still a high risk of accidents occurring.

[Purpose of invention]

The present invention was developed based on the above-mentioned circumstances, and its purpose is to safely fit the light source bulb into the narrow area of the optical device without requiring any skill while the light source bulb is housed in the case. An object of the present invention is to provide a light bulb case that can be easily installed.

[Means to solve the problem]

The light bulb case of the present invention includes a plastic light bulb case body consisting of a large-diameter tube at the center and small-diameter tubes at the ends extending coaxially from both ends of the large-diameter tube to the large-diameter tube. The case body is divided into one case part and the other case part by a dividing plane extending along the cylindrical axis, and the one case part and the other case part are connected to each other at the dividing plane. The small-diameter cylindrical portion has a connecting mechanism that connects the small-diameter cylindrical portion with the locked portion provided on the one case portion and the locked portion provided on the other case portion. a pair of ears having locking claws at one end that elastically engage to connect the one case part and the other case part, and the other ends of the pair of ears are brought close to each other. The locking pawl is removed from the locked portion by the locking operation.

According to this configuration, the light source bulb can be placed in the optical device while being housed in the light bulb case, so it is possible to prevent the light source bulb from exploding due to a collision, etc., resulting in high safety. Moreover, since the light bulb case can be divided into two parts along the axial direction, and both case parts are connected and held together by a connecting mechanism provided in the case, separation of the case parts is easy even in a narrow installation space. In addition, no undue force is applied to the light source bulb, making it extremely convenient for the operator.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings in a case where a high-pressure xenon short arc discharge lamp is used as a light source bulb.

FIGS. 1A, 1B, and 1C are an explanatory front view, top view, and left side view showing one embodiment, and show a state when one case portion 30 and the other case portion 40 are connected.

The light bulb case 20 basically consists of a large diameter cylindrical portion 50 at the center and small diameter cylindrical portions 60 and 70 at the ends extending coaxially with the large diameter cylindrical portion 50 from both ends of the large diameter cylindrical portion 50, respectively. The assumed plastic light bulb case body is aligned with the cylindrical axis X of the light bulb case body
The case portion 30 is divided into one case portion 30 and the other case portion 40 by a dividing surface 21 extending along the
and the other case part 40 are separated from each other, the high-pressure xenon short arc discharge lamp 1 is housed, for example, in the other case part 40, and then the one case part 30 and the other case part 40 are separated. By attaching the bulbs so that they touch each other at the surfaces 21, the discharge lamp 1 is set in a state where it can be stored and held within the bulb case 20.

The large-diameter cylindrical portion 50 and the small-diameter cylindrical portions 60 and 70 have, for example, a hollow cylindrical shape, a hollow polygonal cylindrical shape, or a combination thereof. In the illustrated example, the large-diameter cylindrical portion 50 is As shown in FIG.
A cylindrical portion 53 formed in between has an arcuate cross-sectional shape, and the internal space 54 of this large-diameter cylindrical portion 50 is large enough to accommodate the approximately spherical light-emitting portion surrounding portion 100 of the discharge lamp 1 to be accommodated. be done. Small diameter cylinder part 60
and 70 have a small diameter cylindrical shape, and have base storage parts 61 and 71 on the end side for storing the end bases 5, 5 of the discharge lamp 1, and when the discharge lamp 1 is stored, the cylinder axis is In order to prevent rattling in the X direction, a stopper part 6 is formed by increasing the wall thickness and providing a step on the inner wall of the base storage parts 61 and 71.
2 and 72. Base storage parts 61 and 71
The inner diameter is approximately equal to or slightly larger than the outer diameter of the end bases 5, 5 of the discharge lamp 1 to be housed,
The length is such that at least the protruding pins 6, 6 of the end bases 5, 5 protrude outward from the small diameter cylindrical parts 60, 70, respectively, when the discharge lamp 1 is housed. The inner diameters of the stopper parts 62 and 72 correspond to the rod-shaped glass parts 101 and 102 of the discharge lamp 1 to be accommodated.
It is said to be large enough to accommodate. Numerals 65 and 75 are cylindrical connecting portions each having a truncated conical outer shape, and the large diameter cylindrical portion 50 is coaxially connected to the small diameter cylindrical portions 60 and 70, respectively, by these cylindrical connecting portions 65 and 75.

Reference numerals 80 and 90 denote connection mechanisms, and these connection mechanisms 80 and 90 are provided in the small diameter cylindrical portions 60 and 70, respectively, and connect one case portion 30 and the other case portion 40 to each other at the dividing surface 21. It is connected in a state.

As shown in FIG. 2A, the coupling mechanism 80 includes a pair of locked parts 82, 82 formed integrally with one case part 30 in the small diameter cylindrical part 60, and a pair of locked parts 82, 82 formed integrally with the other case part 40. a pair of ear portions 81 having a locking claw 813 at one end that is shaped like a square shape and elastically engages with the locked portions 82, 82 to interconnect one case portion 30 and the other case portion 40; ,8
1 and more. The ear portion 81 is integrally connected to a bending connection portion 811 that protrudes and extends along the cylinder axis X at the outer periphery of the contact portion of the other case portion 40 with the one case portion 30. , case part 30 and case part 4
a plate-like portion 812 extending substantially perpendicularly to the dividing surface 21 beyond the dividing surface 21 with 0, and this plate-like portion 812
formed at one end of the. It consists of a locking pawl 813 that bends inward from the plate-like portion 812. Locked part 82
In the illustrated example, the engagement protrusion 821 protrudes from the outer periphery of one case portion 30 and extends along the cylinder axis X direction, and one surface thereof serves as an engagement surface that engages with the locking pawl 813. 83 and 84 are protrusions;
These protrusions 83 and 84 extend in a semicircular shape in the circumferential direction of the outer wall of one case portion 30 at one end and the other end of the engaging protrusions 821 and 821, respectively. and 84 are for preventing displacement of the locking pawl 813 in the cylinder axis X direction.

The coupling mechanism 90 includes a pair of locked parts 92, 92 formed integrally with one case part 30 in the small diameter cylindrical part 70, and a pair of locked parts 92, 92 formed integrally with the other case part 40. It consists of a pair of ear parts 91, 91 each having a locking claw 913 at one end that elastically engages with the parts 92, 92 and connects one case part 30 and the other case part 40 to each other. The locked parts 92, 92 and the ears 91, 91 have the same configuration as the locked parts 82, 82 and the ears 81, 81, respectively, described above. And 93 and 94 are locking claws 9
13 in the direction of the cylinder axis X, and its configuration is the same as that of the protrusions 83 and 84 described above.

The connecting mechanisms 80 and 90 connect the one case part 30 and the other case part 40 in a state where they are in contact with each other at the dividing surface 21. To release this connected state, the ear parts 81, 81 are connected with fingers.
By bringing the other ends 814, 814 closer to each other, the locking claws 813, 813 are connected to the locked portion 8, respectively.
2, 82, and remove the other end 91 of the ear portions 91, 91.
4 and 914 close to each other, the locking claw 9
13 and 913 from the locked parts 92 and 92, respectively, and the case parts 30 and 40 are separated.

In FIG. 3, 41 is a protrusion provided to protrude from a surface portion 42 of the other case portion 40 that is in contact with the other case portion 30, and 31 is a protrusion that is provided between the one case portion 30 and the other case portion 40. This is a fitting hole provided in the opposing surface portion 32 so as to fit with the protrusion 41 when the case parts 30 and 40 are connected, and these protrusions 41 and the fitting hole 31
is for suppressing displacement in the direction parallel to the dividing surface 21 when the case parts 30 and 40 are connected.

According to the light bulb case 20 having the above configuration, the cylinder axis
Since it has a configuration that can be divided into two parts along Connecting mechanism 8 connects case portion 30 with, for example, fingers.
At 0 and 90, the locking claws 8 of the ears 81 and 91
13 and 913 are the locked parts 82 and 92, respectively.
the ears 8 by pressing lightly to engage them.
The ear portion 8 with the bending connection portion 811 in 1 as a fulcrum.
The ends of the ears 91 and 81 can be expanded against each other's elastic force, and the ends of the ears 91 and 91 can be expanded against each other's elastic force using the bending connection part 911 in the ear part 91 as a fulcrum. Therefore, the case portion 30 and the case portion 40 can be easily connected. In the connected state, the ear portion 8
The engagement between the locking claws 813 and 913 of 1 and 91 and the locked parts 82 and 92 prevents the case portion 30 and the case portion 40 from being separated, so that the discharge lamp 1 does not touch the light bulb case 20 during transportation or storage. Moreover, the end bases 5 and 5 of the discharge lamp 1 are housed in the base housing parts 61 and 71 in the small diameter parts 60 and 70, respectively, and their inner wall surfaces allow displacement in a direction perpendicular to the cylinder axis X direction. is suppressed, and the cylinder axis
Since the displacement in the direction is suppressed, even if the discharge lamp 1 is subjected to vibration during transportation, the discharge lamp 1 is prevented from rattling and can be safely stored and held in the light bulb case 20 without being damaged. When installing the discharge lamp 1 in the light source bulb installation area of a movie projector, projector, printing machine, etc.,
The light bulb case 20 is approximately the same size and small as the discharge lamp 1, and the projecting pins 6, 6 for mounting the discharge lamp 1 are projected outward from the small diameter cylindrical portions 60 and 70, respectively. Since the electric lamp 1 is housed, the discharge lamp 1 can be placed in a narrow light source bulb installation area 25 with the discharge lamp 1 housed in the light bulb case 20 as shown in FIG. ,
Moreover, in the work of removing the light bulb case 20,
A pair of ears 81 in the coupling mechanisms 80 and 90,
81 and 91, the other end 814 of 91, 814 and 9
14,914 are brought close to each other with fingers, respectively, and the bent connecting parts 811,811 and 911,91
Locking pieces 813, 813 and 91 with 1 as a fulcrum
By moving the locking pieces 813 and 913 in the direction of separating them from each other, the locking pieces 813 and 813 are engaged with the locked parts 82 and 82, and the locking pieces 913 and 91
3 and the locked parts 92, 92 can be easily disengaged. Therefore, even in a narrow installation space, the discharge lamp 1 can be easily disengaged by simple operation with fingers without applying excessive force to the discharge lamp 1. One case part 30 and the other case part 40 can be separated from each other safely and easily, and as a result, the light bulb case 20
The removal work can be carried out extremely easily and safely. And the case parts 30 and 40 are
Since they are made of plastic, they can be molded in one piece and can therefore be used as a snap spring or as an E.
The light bulb case can be easily manufactured without requiring a separate fastener such as a ring.

[Effect of idea]

As described above, the present invention provides a plastic light bulb case body consisting of a large-diameter cylindrical portion at the center and small-diameter cylindrical portions at the ends extending coaxially from both ends of the large-diameter cylindrical portion to the large-diameter cylindrical portion. The light bulb case body is divided into one case part and the other case part by a dividing plane extending along the cylindrical axis, and the one case part and the other case part are mutually connected at the dividing plane. The small-diameter cylindrical portion has a connecting mechanism that connects the small diameter cylindrical portion in contact with the locked portion provided in the one case portion and the locked portion provided in the other case portion. a pair of ears each having a locking claw at one end that elastically engages with the other case part and connects the one case part and the other case part; Since the light bulb case is characterized in that the locking claw is removed from the locked portion by bringing the light source bulb close to the light bulb case, the light source bulb can be moved into the narrow space of the optical device while the light source bulb is housed in the light bulb case. It can be placed in the area where the light source bulb is installed, thus preventing accidents such as the light source bulb colliding and exploding.Moreover, the bulb case is made of plastic and can be divided into two along the cylindrical axis. and the engagement between the locking portion integrally provided on one case portion and the other case portion and the locking claw of the ear portion can be easily released by a small pinching force with fingers. Therefore, it is easy to separate the case parts even in a narrow installation space, and in addition, no excessive force is applied to the light source bulb, and the light source bulb can be safely installed without being damaged.

[Brief explanation of the drawing]

Figures 1A, 2B, and 3 are respectively a partially cutaway front view, a partially cutaway plan view, and a left side view showing one embodiment, and Figures 2A and 2 are respectively the same as those in Figure 1A. A cross-sectional view along the line A-A and a cross-sectional view along the line B-B, FIG. 3 is an explanatory diagram showing a light bulb case disassembled into case parts and a light source bulb in comparison, FIG. 4 is a perspective view showing an example of a light source bulb, Fig. 5 is an explanatory exploded perspective view showing an example of a conventional storage container, Fig. 6 is a perspective view showing a state in which a light source bulb is housed in a case, and Fig. 7 is an explanation of a conventional light source bulb arrangement means. 8A and 8B are respectively an explanatory front view and a left side view showing a conventional light bulb case, and FIG. 9 is a diagram showing a light source bulb housed in the light bulb case according to the present invention arranged in the installation area. FIG. DESCRIPTION OF SYMBOLS 1... Discharge lamp, 2... Storage recess, 3... Storage container, 4... Cylindrical case, 5... End base, 6
... Protrusion pin, 9 ... Reflector, 10 ... Light bulb holder, 13 ... Cylindrical case, 16, 17 ... Snap spring, 20 ... Light bulb case, 21 ... Divided surface, 30 ... One case part , 40...other case part, 50...large diameter cylinder part, 60, 70...
Small diameter cylinder part, 61, 71...Base storage part, 62,
72... Stopper part, 65, 75... Cylindrical connection part, 80, 90... Connection mechanism, 81, 91... Ear part, 82, 92... Locked part, 811, 911...
...Bending connection part, 812, 912...Plate-shaped part, 81
3,913...Locking portion, 821,921...Engaging protrusion, 83,84,93,94...Protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] A plastic light bulb case body consisting of a large-diameter cylindrical part at the center and small-diameter cylindrical parts at the ends extending coaxially from both ends of the large-diameter cylindrical part to the large-diameter cylindrical part. The light bulb case body is divided into one case part and the other case part by a dividing plane extending along the cylindrical axis, and the one case part and the other case part are mutually connected at the dividing plane. The small-diameter cylindrical portion has a connecting mechanism that connects the small-diameter cylindrical portion while being in contact with the latched portion provided on the one case portion;
a pair of ear portions provided on the other case portion and each having a locking claw at one end that elastically engages the locked portion and connects the one case portion and the other case portion; A light bulb case characterized in that the locking claw is removed from the locked portion by bringing the other ends of the pair of ear portions closer to each other.