JP2008286873A - Projector and structure for suspending projector from ceiling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector constituted so that an attaching tool for suspending a projector from the ceiling can be attached to a housing without separately preparing a bolt or a nut or the like, and structure for suspending the projector from the ceiling. <P>SOLUTION: Protrusive parts 3, 3, ... respectively having inverted L-shaped insertion recessed parts 3a are juxtaposed integrally on the base part 22 of the housing 21 of the projector 2, and plate parts 41 and 41 at the lower part of a fixing fitting 4 are inserted in the insertion recessed parts 3a, 3a, ... to slide on rails 26 and 26 from the back part side to the front part side of the housing 21 until abutting on a stopper 27. Next, an aperture 23 is covered with a lamp door 24 while inserting a locking protrusive part 51 provided to protrude downward integrally with the lamp door 24 in the hole 41a of the plate part 41 from above. In such a case, a screw 10 is used to fix the lamp door 24 in the housing 21 but the bolt or the nut or the like for fixing the fixing fitting 4 in the housing 21 need not be prepared. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a projector suspended from an upper structure (for example, a ceiling, a beam, etc.), and a ceiling suspension structure of the projector.

  In order to hold the projector in a suspended form from the ceiling, a ceiling-suspended structure of the projector has been disclosed (see Patent Document 1).

FIG. 6 is a perspective view showing an external appearance of a conventional projector, and FIG. 7 is an exploded perspective view showing the configuration of the projector.
In the figure, reference numeral 9 denotes a projector, and the projector 9 includes a rectangular parallelepiped casing 90 in which a projection lens 91 is disposed on a front portion. Since the projector 9 is suspended from the top and bottom, the part including the bottom surface portion 90a of the housing 90 is shown in FIG.
As shown in FIG. 6, a ceiling mounting fixture 92 is attached to the center of the bottom surface 90 a by four bolts 93, 93,. For this purpose, as shown in FIG. 7, four bosses 94, 94,... Are provided at the center of the bottom surface 90a, and each boss 94 has a nut 95 from the inside of the housing 90. Is press-fitted.

Plate-shaped portions 92a, 92a are provided at the lower portion of the fixing bracket 92, and through-holes 92b, 92b,... Are formed in the plate-shaped portions 92a, 92a at positions corresponding to the positions of the bosses 94, 94,. Has been.
An operator who suspends the projector 9 from the ceiling, for example, places plate-like portions 92a, 92a in the horizontal direction at the lower end of a mounting arm that hangs down from the ceiling, attaches the upper portion of the fixing bracket 92, and further attaches the plate-like portions 92a, 92a. While the projector 9 is supported so that the through holes 92b, 92b, ... are positioned above the bosses 94, 94, ..., the bolts 93, 93, ..., the through holes 92b, 92b, ... and the bosses 94, 94, ... The nuts 95, 95,...

In other words, by fixing the fixing bracket 92 attached to the attachment arm that hangs down from the ceiling and the bottom surface portion 90a of the housing 90, the projector 9 is suspended from the top and bottom.
By the way, the housing 90 accommodates a lamp (not shown) for projecting an image onto a wall surface, a screen or the like via the projection lens 91, and an opening for mounting / removing the lamp is a housing of the bottom surface portion 90a. 90. The opening is closed by a lamp door 96, as shown in FIGS. The lamp door 96 is fixed to the housing 90 by screwing screws (not shown) into screw holes (not shown) formed in the housing 90.
JP 2000-122180 A

In the conventional ceiling suspension structure, in order to suspend the projector 9 from the ceiling, a plurality of bolts 93, 93,... And nuts 95, 95,.
Further, an operator stands at a high position and supports the projector 9 with one hand in a state where the through holes 92b, 92b,... And the bosses 94, 94,. It is necessary to repeat the fastening of the nut 93 and the nut 95 a plurality of times, and workability is poor.
Moreover, since the nuts 95, 95,... That are press-fitted into the bosses 94, 94,... Are generally made of metal, the casing 90 is made of synthetic resin. And nuts 95, 95,... Need to be separated, and the recyclability is poor.

  The present invention has been made in view of such circumstances, and its main purpose is to slide the plate-like portion of the fixture into the insertion recess formed integrally with the projector housing, and to open the housing opening. By attaching the locking projections that are integrally formed on the lid to the holes in the plate-like part, you can attach the ceiling mounting fixture to the housing without preparing bolts, nuts, etc. It is an object of the present invention to provide a projector that can perform the above and a ceiling suspension structure of the projector.

  Another object of the present invention is to provide a projector that can easily attach a fixture to a housing because a projecting portion provided with an insertion recess projects from the bottom surface of the housing. .

  Another object of the present invention is to provide a projector capable of easily attaching a fixture to a housing by projecting a columnar locking projection from a support portion formed integrally with a lid. There is.

  Still another object of the present invention is to attach a fixture to a housing more easily by adopting a structure in which a locking projection having a tapered surface is projected from a support portion formed integrally with a lid. It is an object of the present invention to provide a projector that can perform the above-described process.

  A projector according to the present invention includes a housing that houses a lamp for projecting an image, an opening for attaching and detaching the lamp is provided on one surface, and a lid that can open and close the opening, In a projector that is suspended from an upper structure through a fixture provided with a plate-like portion that is arranged in a horizontal direction and is provided with a hole when attached to the one surface portion, the projector is directed upward. An inverted L-shaped insertion recess capable of slidingly inserting the plate-like portion along the one surface portion is formed integrally with the one surface portion, and the fixture is locked by the closed lid. In order to achieve this, a locking projection inserted into the hole is formed integrally with the lid.

  In the projector according to the aspect of the invention, the one surface portion is a bottom surface portion from which a plurality of leg portions for standing are protruded, and the insertion recessed portion protrudes smaller than a protrusion amount of the leg portion from the bottom surface portion. It is provided inside the inverted L-shaped projecting portion having a quantity and projecting from the bottom surface portion.

  In the projector according to the present invention, the lid is closed in a direction along the one surface portion, and the lid is integrally provided with a support portion disposed substantially parallel to the lid so as to support the locking projection. The locking projection is a columnar shape that protrudes integrally from the support portion in a direction intersecting the lid.

  In the projector according to the present invention, the lid is closed in a direction along the one surface portion, and the lid is integrally provided with a support portion disposed substantially parallel to the lid so as to support the locking projection. The locking projection is integrally projected in a direction intersecting the lid from the support portion, and from the upstream side to the downstream side in the insertion direction of the plate-like portion with respect to the insertion concave portion, It has the taper surface which the protrusion amount from a support part increases, It is characterized by the above-mentioned.

  A ceiling-suspended structure according to the present invention includes a housing that houses a lamp for projecting an image, an opening for attaching and detaching the lamp, and a lid that can open and close the opening. The projector includes a ceiling suspended structure that is suspended from an upper structure through a fixture attached to the projector, and the one surface portion has an inverted L-shape for slidingly inserting the fixture. An insertion recess is formed integrally, and a locking projection is formed integrally with the lid to lock the fixture with the closed lid, A plate-like portion in which a hole is formed is provided, and the plate-like portion arranged in the horizontal direction is inserted into the insertion recess along the one surface portion directed upward, and The stop convex part is inserted in the said hole, It is characterized by the above-mentioned.

In the present invention, an operator forms an integral part of one surface of the housing with the one surface of the housing facing upward and the plate-like portion provided on the fixture arranged in the horizontal direction. The slide is inserted along the one surface portion into the insertion recess.
Since the insertion recess is in an inverted L shape, the plate-like portion inserted into the insertion recess is in contact with the lateral portion of the inverted L shape even if the fixture is moved upward relative to the housing. It becomes impossible to move upward from the lateral portion. As a result, the casing is restricted from moving downward relative to the fixture, and therefore does not fall downward from the fixture.

  In addition, the operator inserts the locking projection formed integrally with the lid of the opening of the housing into the hole formed in the plate-like portion of the fixture. Since the hole in the plate-like part is formed in the vertical direction, the fixture is locked with the lid by inserting the locking projection in the hole in the vertical direction, and the lid is closed, Since the fixture is restricted from moving in the lateral direction relative to the lid (and thus the casing), the casing does not detach from the fixture in the lateral direction.

Since the fixture is directly or indirectly attached to the upper structure, the projector is suspended from the upper structure via the fixture.
In this case, the plate-like part having the hole is provided in the fixture, the insertion concave part is provided integrally on one surface part of the casing, and the lid provided with the locking convex part is provided on the casing. Since it is attached, it is not necessary to prepare separate members such as bolts and nuts for mounting the fixture and the housing.
By the way, the housing accommodates a lamp for projecting an image, and the opening of the housing is provided on one surface of the housing (that is, the surface to which the fixture is attached) in order to attach and detach the lamp to the housing. It has been. The operator opens the lid, puts in and out the lamp through the opening, and closes the lid again.

In the present invention, the one surface portion to which the housing fixture is attached is a bottom surface portion, and a plurality of leg portions for placing the projector project from the bottom surface portion of the housing.
When the projector is installed on the floor, a desk, or the like, the floor, the desk, or the like is separated from the bottom surface of the housing by a protruding amount from the bottom surface of each leg. That is, a space is provided between the floor, desk, etc. and the bottom surface of the housing.

  By the way, an inverted L-shaped protrusion protrudes from the bottom surface of the housing. That is, the protruding portion is arranged outside the casing (for example, a space between a floor, a desk or the like and the bottom surface of the casing) and is not arranged inside the casing. For this reason, for example, compared with a case where the insertion recess is recessed in the shape of a groove on the bottom surface of the housing, the operator can easily see the protruding portion from the side of the housing, and thus the insertion recess, Moreover, since the shape of the housing is simple, it is easy to manufacture the housing.

In addition, since the protruding amount of the protruding portion from the bottom surface portion is smaller than the protruding amount of each leg portion from the bottom surface portion, the protruding portion protruding from the bottom surface portion of the housing does not hinder the stable installation of the projector. Absent. As a result, the space between the floor, desk, etc. and the bottom surface of the housing is effectively used.
If a protruding portion protrudes from the front, back, side, or top surface of the housing, this protruding portion obstructs the movement of the hand of the user who operates the stationary projector, for example. In addition, the gap between the floor, desk, etc. and the bottom surface of the housing cannot be used effectively.

In the present invention, the lid of the opening of the housing has a columnar locking projection and a support portion that supports the locking projection, and the lid is in a direction along one surface of the housing. Closed.
On the other hand, the support part is arranged substantially parallel to the lid. That is, the support portion is disposed along one surface portion of the housing when the lid is closed. Further, the support portion is formed integrally with the lid, and the locking projection protrudes in a direction intersecting the lid from the support portion (that is, a direction intersecting one surface portion of the housing when the lid is closed). It is installed.
The operator first opens the lid of the housing opening (for example, removes the lid from the housing), then slides the plate-shaped portion of the fixture into the insertion recess of the housing, and finally In addition, when the lid of the opening of the housing is closed (in this case, the lid is attached to the housing), the locking convex portion is inserted into the hole of the plate-like portion from above or below the plate-like portion.

  Generally, the operation of closing the lid of the opening is easy (because a complicated operation such as fastening a large number of bolts and nuts is unnecessary). For this reason, the operation | work which inserts the latching convex part with respect to a hole and closes a lid | cover is easy.

In the present invention, the lid of the opening of the housing has a locking projection having a tapered surface and a support portion that supports the locking projection, and the lid is along one surface of the housing. Closed in the direction.
On the other hand, the support part is arranged substantially parallel to the lid. That is, the support portion is disposed along one surface portion of the housing when the lid is closed. Further, the support portion is formed integrally with the lid, and the locking projection protrudes in a direction intersecting the lid from the support portion (that is, a direction intersecting one surface portion of the housing when the lid is closed). It is installed.
The taper surface of the locking convex portion increases the protruding amount from the support portion from the upstream side to the downstream side in the direction in which the plate-like portion of the fixture is inserted into the insertion concave portion of the housing.

The operator inserts the plate-like portion of the fixture into the insertion recess of the housing with the lid of the opening of the housing closed. At this time, the plate-like portion slides on the tapered surface, and the plate-like portion is smoothly inserted below the support portion, whereby the locking convex portion is inserted into the hole from above or below the plate-like portion. The
For this reason, the operation | work which inserts the latching convex part with respect to a hole and closes a cover is unnecessary.

In the case of the projector and the ceiling-suspended structure according to the present invention, bolts, nuts, and the like for attaching the fixture and the housing are unnecessary, and therefore the number of parts can be reduced. As a result, it is possible to easily prepare for the suspension work, and it is possible to improve the convenience for the operator.
And since it is not necessary to repeat fastening of a volt | bolt and a nut several times in the state which aligned the fixture and the housing | casing, workability | operativity can be improved.
Further, by inserting the plate-like portion of the fixture into the inverted L-shaped insertion recess, the casing does not fall off from the fixture. For this reason, the labor for an operator to support a housing | casing by hand can be reduced.

  Moreover, since the insertion recess is integrally provided on one surface of the housing and the locking projection is integrally provided on the lid, for example, when the projector is discarded, the housing and the insertion recess are separated. There is no need, and recyclability can be improved.

In the case of the projector according to the present invention, since the operator can easily see the insertion recess from the side of the casing, the fixture can be easily attached to the casing.
Further, since the insertion recess is not arranged inside the housing, the insertion recess can effectively use the space inside the housing without hindering the layout inside the housing. Moreover, the protruding portion provided with the insertion recess does not hinder the stable installation of the projector or the operation of the projector by the user.

  According to the projector of the present invention, it is easy to insert the locking projection of the lid into the hole of the plate-like portion of the fixture and close the lid, so that the fixture can be easily attached to the housing.

  In the case of the projector according to the present invention, it is possible to insert the locking projection of the lid into the hole of the plate-like portion of the fixture with the lid closed, and therefore after the insertion of the locking projection to the hole Thus, the work of closing the lid is unnecessary, and the fixture can be attached to the housing more easily.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.

Embodiment 1.
FIG. 1 is a perspective view showing an external appearance of a projector according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view showing the configuration of the projector, and FIG. 3 is a perspective view showing the configuration of a lamp door that is a lid of the projector.
In the figure, reference numeral 1 denotes a ceiling suspension structure. The ceiling suspension structure 1 is configured such that the projector 2 is suspended from an upper structure (not shown) (for example, a ceiling, a beam, etc.) through a fixing bracket 4 in an upside down posture. It is.

  There are two main features of the ceiling suspension structure 1 according to the present invention. First, the projector 2 is inserted into the insertion recesses 3a, 3a,... Formed integrally with the housing 21 of the projector 2 by sliding the plate-like portions 41, 41 formed integrally with the fixing bracket 4 into the housing 21 of the projector 2. It is to hang from the ceiling. The second is to prevent the projector 2 suspended from the ceiling from falling off by locking the plate-like portion 41 inserted into the insertion recesses 3 a, 3 a,... With the lamp door 24 of the projector 2.

Below, the specific structure of the ceiling suspension structure 1 is demonstrated.
As shown in FIGS. 1 and 2, the projector 2 includes a rectangular parallelepiped housing 21 in which a projection lens 20 is disposed on a front surface 21a, and a bottom surface portion 22 of the housing 21 is directed upward (for example, on the ceiling side). It is suspended from the ceiling (that is, in an upside down posture).
Hereinafter, the facing direction between the top surface portion and the bottom surface portion 22 of the projector 2 is referred to as the up-down direction, and is substantially equal to the vertical direction. Further, the facing direction between the front part 21a and the rear part of the projector 2 is referred to as the front-rear direction, the facing direction of both side parts of the projector 2 is referred to as the left-right direction, and the front-rear direction and the left-right direction are substantially equal to the horizontal direction. . FIG. 3 shows the lower surface side of the lamp door 24.

  The casing 21 is made of synthetic resin. As shown in FIGS. 1 and 2, a total of three legs are provided from the bottom surface portion 22 of the casing 21, one at the front end and one at the left and right at the rear end. Portions 251, 252, and 253 project. The front end leg portion 251 and the rear end leg portion 252 can adjust the amount of protrusion from the bottom surface portion 22, respectively, and the leg portions 251, 252, 253 are below the bottom surface portion 22 (for example, on the mounting table side). This is used when the projector 2 is stationary toward the projector. .., Rails 26, 26, stoppers 27, and supporting projections 5 of the closed lamp door 24, the protruding amounts from the bottom surface portion 22 are the bottom surface portions of the leg portions 251, 252, 253. 22 is smaller than the minimum protrusion amount from 22.

Fixing brackets 4 are attached to the center portions of the bottom surface portion 22 of the housing 21 in the left-right direction and the front-rear direction. For this purpose, a total of six projecting portions 3, 3,... Are integrally formed on the bottom surface portion 22 of the housing 21 so as to be spaced apart from each other by an appropriate length in the left-right direction.
Each protrusion 3 has an inverted L-shaped plate shape, and an inverted L-shaped insertion recess 3 a is provided on the inner surface side of the protrusion 3, and a plate-like portion 41 of the fixing bracket 4 is provided in the insertion recess 3 a. As will be described later, the slide is inserted while moving in the forward direction relative to the casing 21 (that is, from the back side to the front side 21a).

The right side (or left side) three projecting parts 3, 3,... Are juxtaposed in the front-rear direction at substantially the same position in the left-right direction, and the vertical L-shaped vertical part projects upward from the bottom surface part 22. The horizontal portion of the inverted L-shape protrudes left (or right) from the vertical portion. In other words, the insertion recesses 3a, 3a,... Of the right protrusions 3, 3,... And the insertion recesses 3a, 3a,.
On the right surface (or left surface) of the vertical portion of the right (or left) protruding portion 3, a reinforcing plate portion that reinforces the vertical portion and suppresses unnecessary bending, distortion, and the like is provided.

  A stopper 27 protrudes upward from the bottom surface portion 22 in the vicinity of the right frontmost protrusion 3 and at the front end of the region where the protrusion 3 and the left front protrusion 3 face each other. The stopper 27 is also integrally formed with the casing 21, and the plate-like portions 41 and 41 of the fixing bracket 4 that are slid and inserted into the insertion recesses 3a, 3a,. When the portion 41 abuts against the stopper 27, the relative movement is stopped.

Between the right and left protrusions 3, 3,... And the left protrusions 3, 3,. 21 is integrally formed. The rails 26, 26 have an elongated rectangular shape, face in the left-right direction, and project upward from the bottom surface portion 22. The lower surfaces of the plate-like portions 41 and 41 of the fixture 4 inserted into the insertion recesses 3a, 3a,... While relatively moving in the forward direction slide on the upper end surfaces of the rails 26 and 26, respectively. That is, the friction between the plate-like portions 41 and 41 and the housing 2 is small, and the sliding of the plate-like portions 41 and 41 is smooth.
The plate-like portions 41, 41 slid and inserted into the insertion recesses 3a, 3a,... Are sandwiched between the upper end surfaces of the rails 26, 26 and the lower surfaces of the lateral portions of the projecting portions 3, 3,.

  If the rails 26 and 26 are not provided, the lower surfaces of the plate-like portions 41 and 41 of the fixing bracket 4 inserted into the insertion recesses 3a, 3a,... To do. That is, the friction between the plate-like portions 41 and 41 and the housing 2 is large, and the smooth sliding of the plate-like portions 41 and 41 is hindered.

By the way, the housing | casing 21 accommodates the lamp | ramp which is not shown in figure for projecting an image on a wall surface, a screen, etc. via the projection lens 20. FIG. In order to attach / remove the lamp, a rectangular opening 23 is formed in the front portion of the bottom surface portion 22 of the housing 21, and a rectangular plate-shaped lamp door 24 is attached as a lid of the opening 23. Here, FIG. 1 shows a state where the lamp door 24 is closed, and FIG. 2 shows a state where the lamp door 24 is opened.
The configuration and the opening / closing procedure related to the opening / closing of the lamp door 24 are substantially the same as the configuration and the opening / closing procedure related to the opening / closing of the lamp door 96 of the conventional projector 9, and the operator opens the lamp door 24 and installs / After the removal, the lamp door 24 is closed. The closed lamp door 24 is disposed in a direction along the bottom surface portion 22 of the housing 21 as shown in FIG.

  Specifically, the lamp door 24 is made of a synthetic resin and is detachably provided to the housing 21. For this purpose, as shown in FIGS. 2 and 3, L-shaped engagement protrusions 24 a, 24 a,... Are arranged in parallel at the front end of the peripheral end portion of the lamp door 24. Of the peripheral edge portion, engaged holes 23a, 23a,... That engage with the engaging protrusions 24a, 24a,. A through hole 24 b through which the screw 10 is inserted is formed at the rear end portion of the lamp door 24, and a screw hole 23 b is formed at the rear edge portion of the opening 23.

When opening the lamp door 24, the operator loosens the screw 10 of the lamp door 24 and removes the screw 10 from the screw hole 23b at the rear edge of the opening 23 and the through hole 24b of the lamp door 24 with respect to the projector 2 in the state shown in FIG. Next, the engaging projections 24a, 24a,... Of the lamp door 24 are pulled out from the engaged holes 23a, 23a,. At this time, the projector 2 is in the state shown in FIG.
When the lamp door 24 is closed, the operator inserts the engaging projections 24a, 24a,... Into the engaged holes 23a, 23a,. The lamp door 24 is clamped and fixed between the screw head of the screw 10 and the rear edge of the opening 23 by inserting the hole 24b and the screw hole 23b and tightening the screw 10. At this time, the projector 2 is in the state shown in FIG.

As shown in FIGS. 2 and 3, an inverted L-shaped support protrusion 5 is provided on the rear end surface of the lamp door 24 so as to be adjacent to the through-hole 24 b. The support protrusion 5 is formed integrally with the lamp door 24, and the columnar locking projection 51 and the support portion 52 that is arranged substantially parallel to the lamp door 24 and supports the locking projection 51 are integrally formed. Have.
The support portion 52 is an inverted L-shaped horizontal plate portion of the support protrusion 5, and protrudes rearward from the inverted L-shaped vertical plate portion in parallel with the lamp door 24. On the front surface of the vertical plate portion, a reinforcing plate portion that reinforces the support portion 52 and suppresses unnecessary bending, distortion, and the like is provided. That is, the support portion 52 is integrally formed with the support protrusion 5 and thus the lamp door 24.

The locking convex portion 51 is integrally projected from the lower surface of the support portion 52. In other words, the locking projection 51 is integrally formed with the support protrusion 5 and thus the lamp door 24, and protrudes in a direction intersecting the lamp door 24 from the support portion 52. Further, as will be described later, the locking projection 51 is inserted into the hole 41a of the plate-like portion 41 of the fixture 4 when the lamp door 24 is closed.
When the lamp door 24 is closed, the support protrusion 5 is disposed in the vicinity of the leftmost front protrusion 3.

The fixing bracket 4 is a ceiling-mounting fixture, which is formed by bending a substantially cross-shaped metal plate, and as shown in FIGS. 1 and 2, two plate-like upper portions 4a and 4a and L-shaped respectively. The two plate-like lower parts 4b, 4b bent in a straight line and the rectangular plate-like central part 4c are integrally formed.
The central portion 4c is arranged in the horizontal direction, with the upper portions 4a and 4a rising from the front and rear end portions of the central portion 4c, and the lower portions 4b and 4b depending from the left and right end portions of the central portion 4c.
The upper portions 4a and 4a are fixed in advance to, for example, the lower end of a mounting arm that hangs down from the ceiling before the projector 2 is suspended from the ceiling.

The casing 21 of the projector 2 is attached to the lower parts 4b and 4b when the projector 2 is suspended from the ceiling.
The lower portions 4b and 4b are symmetrically arranged in the left-right direction, and the right (or left) lower portion 4b has an L-shaped vertical portion projecting downward from the central portion 4c and is a horizontal portion that is an L-shaped horizontal portion. A directional plate-like portion 41 projects from the vertical portion to the right (left). The plate-like parts 41, 41 and the central part 4c are arranged substantially in parallel. Each plate-like portion 41 has a plurality of holes 41a, 41a,... Each hole 41 a is circular, and the inner diameter of the hole 41 a is slightly longer than the outer diameter of the locking projection 51.

The fixing bracket 4 as described above has substantially the same configuration as the conventional ceiling-mounting fixing bracket 92. That is, it is possible to use the conventional fixing bracket 92 in order to configure the ceiling suspension structure 1.
Finally, the procedure for hanging the projector 2 from the ceiling will be described.
Before the projector 2 is suspended from the ceiling, the operator fixes the upper portions 4a, 4a of the fixing bracket 4 to the lower end of the mounting arm that hangs down from the ceiling. At this time, the plate-like portion 41 is arranged in the horizontal direction.

  Next, after opening the lamp door 24, the operator supports the casing 21 with both hands and places it in front of the fixture 4, and inserts the recesses 3 a, 3 a,. The bottom surface of each of the plate-like portions 41 and 41 is slid on the upper end surface of each of the rails 26 and 26 by moving the housing 21 backward while checking the positional relationship from the front or side. At this time, when the left and right end portions of the plate-like portions 41, 41 are slid into the left and right insertion recesses 3a, 3a,... And the front end portion of the right-side plate-like portion 41 contacts the stopper 27, 41, 41 are inserted into all of the six insertion recesses 3a, 3a,.

  Is inserted into the insertion recesses 3a, 3a,... Between the inverted L-shaped lateral portions of the insertion recesses 3a, 3a,... And the upper ends of the rails 26, 26. , 41 are restricted from moving in the vertical direction. That is, the relative movement in the vertical direction between the fixture 4 and the casing 21 is restricted. For this reason, even if the operator removes his / her hand from the housing 21 with the plate-like portions 41, 41 inserted in all the six insertion recesses 3a, 3a,..., The projector 2 will not drop downward. .

  By the way, the mounting arm to which the fixing bracket 4 is fixed is generally provided in the vicinity of the wall surface on which an image is projected, a wall surface facing the screen or the like, and therefore the fixing bracket fixed to the wall surface and the lower end of the mounting arm. 4 (ie, the gap behind the fixture 4) is narrow. However, since the gap between the fixing bracket 4 and the wall or screen on which an image is to be projected (that is, the gap in front of the fixing bracket 4) is wide, the casing 21 is arranged in front of the fixing bracket 4 and the casing 21 is rearward. The operation of attaching to the fixing bracket 4 while moving to the position is easier than the operation of attaching the casing 21 to the rear of the fixing bracket 4 and attaching the casing 21 to the fixing bracket 4 while moving the casing 21 forward.

  The operator closes the lamp door 24 after the protrusions 3, 3,. For this purpose, the engaging protrusions 24a, 24a,... Are inserted into the engaged holes 23a, 23a,... To cover the openings 23, and the screws 10 are inserted into the through holes 24b and the screw holes 23b. Then, the lamp door 24 is clamped and fixed between the screw head of the screw 10 and the rear edge of the opening 23 by tightening the screw 10. At this time, the locking projection 51 provided on the lamp door 24 is inserted into one of the holes 41a, 41a,... Formed in the left plate-like portion 41 from above.

By inserting the locking projection 51 projecting downward into the hole 41a formed in the vertical direction, an external force is applied to the housing 21 in the direction along the bottom surface 22. In addition, since the locking projection 51 contacts the inner surface of the hole 41a, the relative movement in the horizontal direction between the fixture 4 and the housing 21 is restricted.
As described above, the projector 2 can be suspended by simply inserting the plate-like portions 41, 41 into the insertion recesses 3a, 3a,... Of the housing 21, but the relative displacement of the fixing bracket 4 with respect to the housing 21 is not limited. Is restricted by the locking projection 51 of the lamp door 24, so that the projector 2 is prevented from falling off.

In order to close the lamp door 24, it is necessary to fasten with a single screw 10. However, as in the case of the conventional projector 9, a plurality of bolts 93, 93,... Are fastened to nuts 95, 95,. There is no need, and the plate 21 and 41 are inserted into the insertion recesses 3a, 3a,. Since the labor for supporting by hand is reduced, the screwing operation of the lamp door 24 is easy. Note that the lamp door 24 may be fixed to the housing 21 by simpler means other than screwing.
To release the projector 2 from the ceiling, the lamp door 24 is opened, the locking projection 51 is removed from the hole 41a, the casing 21 is moved forward, and the plate-like portions 41 and 41 are inserted into the insertion recess 3a. , 3a,...

  In the projector 2 as described above, the projector 2 is suspended from the ceiling using the respective parts formed integrally with the casing 21 and the fixing bracket 4, and is integrally formed with the fixing bracket 4 and the lamp door 24 attached to the projector 2. The projector 2 suspended from the ceiling is prevented from falling off by using each part. For this reason, the operator only needs to prepare the projector 2 and the fixture 4 to be suspended from the ceiling, and does not need to prepare separate members such as bolts and nuts. As a result, the cost of ceiling suspension is reduced.

Further, when the projector 2 is discarded, it is not necessary to remove the metal nut assembled to the synthetic resin casing 21 from the casing 21, thereby reducing the cost of recycling.
Furthermore, the attachment of the casing 21 to the fixing bracket 4 is simple, and the dropping of the casing 21 during the mounting operation is suppressed, so that the workability and safety of the operator are improved.

Embodiment 2. FIG.
FIG. 4 is an exploded perspective view showing the configuration of the projector according to Embodiment 2 of the present invention, and FIG. 5 is a perspective view showing the configuration of a lamp door that is a lid of the projector.
The ceiling suspension structure of the present embodiment has a posture in which the ceiling is inverted from an upper structure (not shown) (for example, a ceiling, a beam, etc.) via the fixing bracket 4 in the same manner as the ceiling suspension structure 1 of the first embodiment. The projector 2 is suspended.
In the following, parts different from the ceiling suspension structure 1 of the first embodiment will be mainly described, and other parts corresponding to those of the first embodiment will be denoted by the same reference numerals and description thereof will be omitted.

The lamp door 24 is integrally formed with a support protrusion 6 instead of the support protrusion 5 of the first embodiment. FIG. 5 shows the lower surface side of the lamp door 24 having the support protrusion 6.
When the lamp door 24 is closed, the support protrusion 6 is disposed in the vicinity of the leftmost front protrusion 3. Further, the support protrusion 6 has a locking projection 61 and a support portion 62 that supports the locking projection 61, and the support portion 62 has substantially the same configuration as the support portion 52 of the first embodiment. . However, the support part 62 has elasticity that slightly bends upward when an external force is applied from below to above and returns to the original shape when the external force disappears.

  The locking convex portion 61 protrudes downward from the lower surface of the support portion 62. Further, the locking convex portion 61 has a lower surface of the support portion 62 from the rear side to the front side, that is, from the upstream side to the downstream side in the insertion direction with respect to the insertion concave portions 3a, 3a,. As shown below, the lamp door 24 is closed and inserted into the hole 42a of the plate-like portion 42 of the fixture 4 as will be described later.

The fixture 4 is provided with plate-like portions 42 and 42 instead of the plate-like portions 41 and 41 of the first embodiment. Although the plate-like parts 42 and 42 are the structure substantially the same as the plate-like parts 41 and 41 of Embodiment 1, the hole 41a, 41a, ... is not formed. However, a rectangular hole 42 a penetrating the plate-like portion 42 is formed at the front end portion of the left-side plate-like portion 42. The inner diameter of the hole 42 a is slightly longer than the outer diameter of the locking projection 61.
Finally, the procedure for hanging the projector 2 from the ceiling will be described.
Before the projector 2 is suspended from the ceiling, the operator fixes the upper portions 4a, 4a of the fixing bracket 4 to the lower end of the mounting arm that hangs down from the ceiling.

  Next, the operator supports the housing 21 with both hands while keeping the lamp door 24 closed, and arranges it in front of the fixture 4, and inserts the recesses 3 a, 3 a,... And the plate-like portions 42, 42 of the fixture 4. The bottom surface of each of the plate-like portions 42 and 42 is slid on the upper end surface of each of the rails 26 and 26 by moving the housing 21 backward while confirming the positional relationship from the front or side. At this time, when the left and right end portions of the plate-like portions 42, 42 are inserted into the left and right insertion recesses 3a, 3a,..., And the front end portion of the right-side plate-like portion 42 contacts the stopper 27, the plate-like portion 42 , 42 are inserted into all six insertion recesses 3a, 3a,.

  By the way, due to the contact between the upper surface of the right plate-like portion 42 and the tapered surface 61a of the locking convex portion 61, an external force is applied to the support portion 62 from the bottom to the top, and the support portion 62 is bent slightly upward. Mu The front end portion of the plate-like portion 42 slides on the tapered surface 61a while gradually bending the support portion 62 upward, and smoothly moves relative to the front. Further, when the plate-like portion 42 is relatively moved and the locking convex portion 61 is positioned right above the hole 42a of the plate-like portion 42, the plate-like portion 42 does not come into contact with the locking convex portion 61. Disappears, and the support portion 62 returns to its original shape by the elastic restoring force. As a result, the locking projection 61 is automatically inserted into the hole 42a from above.

By inserting the locking projection 61 projecting downward into the hole 42a formed in the vertical direction, an external force is applied to the housing 21 in the direction along the bottom surface 22. In addition, since the locking projection 61 contacts the inner surface of the hole 42a, the relative movement in the horizontal direction between the fixture 4 and the housing 21 is limited.
As described above, the plate-like portions 42, 42 are inserted into the insertion recesses 3a, 3a,... Of the casing 21, and the relative displacement of the fixing bracket 4 with respect to the casing 21 is caused by the locking projection 61 of the lamp door 24. By limiting, the projector 2 is suspended from the ceiling and is prevented from falling off.

Similarly to the ceiling-suspended structure 1 of the first embodiment, the projector 2 as described above also suspends the projector 2 from the ceiling using the parts integrally formed with the casing 21 and the fixing bracket 4, so that the fixing bracket 4 and the projector are mounted. 2 is used to prevent the projector 2 suspended from the ceiling from falling off.
In addition, in the present embodiment, the opening / closing operation of the lamp door 24 associated with the ceiling suspension operation is unnecessary, so that the workability is further improved.
By the way, in order to cancel the ceiling suspension of the projector 2, the lamp door 24 is opened or the support portion 62 is manually bent to extract the locking projection 61 from the hole 42a, and the casing 21 is moved forward to form a plate shape. What is necessary is just to extract the parts 42 and 42 from insertion recessed part 3a, 3a, ....

  In addition to the configuration in which the insertion recesses 3a, 3a,... Are provided in the plurality of protrusions 3, 3,. The part 3 may be provided with an insertion recess 3a. Further, the protrusions 3, 3,... May not be provided, and the left and right insertion recesses 3 a and 3 a may be provided in the bottom surface portion 22 of the housing 21 in a groove shape. Further, the plate-like portions 41 and 41 (or plate-like portions 42 and 42) are relatively slid forward from the rear of the housing 21 and inserted into the insertion recesses 3a, 3a,. Alternatively, it may be configured to slide from left or right (or right) to right (or left). Moreover, the structure which attaches the fixing metal fitting 4 to the top | upper surface part of the housing | casing 21 may be sufficient.

1 is a perspective view showing an external appearance of a projector according to Embodiment 1 of the invention. 1 is an exploded perspective view showing a configuration of a projector according to Embodiment 1 of the present invention. It is a perspective view which shows the structure of the lamp door which is a lid | cover of the projector which concerns on Embodiment 1 of this invention. It is a disassembled perspective view which shows the structure of the projector which concerns on Embodiment 2 of this invention. It is a perspective view which shows the structure of the lamp door which is a cover of the projector which concerns on Embodiment 2 of this invention. It is a perspective view which shows the external appearance of the conventional projector. It is a disassembled perspective view which shows the structure of the conventional projector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ceiling structure 2 Projector 21 Case 22 Bottom part (one side part)
23 Opening 24 Lamp door (lid)
251, 252, 253 Leg 3 Projection 3a Insertion recess 4 Fixing bracket (mounting tool)
41, 42 Plate-like part 41a, 42a Hole 51, 61 Locking convex part 52, 62 Support part 61a Tapered surface

Claims (5)

A housing for accommodating a lamp for projecting an image, an opening for attaching and detaching the lamp is provided on one surface, and a lid capable of opening and closing the opening,
In a projector that is suspended from an upper structure via a fixture provided with a plate-like portion that is arranged in a horizontal direction and is provided with a hole when attached to the one surface portion,
An inverted L-shaped insertion recess capable of slidingly inserting the plate-like portion along the one surface portion directed upward is integrally formed on the one surface portion,
In order to lock the fixture with the closed lid, a locking projection inserted into the hole is formed integrally with the lid. The one surface portion is a bottom surface portion from which a plurality of leg portions for deferment projects.
The insertion recess is provided on an inner side of an inverted L-shaped projecting portion that projects from the bottom surface portion with a projecting amount smaller than the projecting amount of the leg portion from the bottom surface portion. The projector according to claim 1. The lid is closed in a direction along the one surface portion, and the lid integrally includes a support portion disposed substantially parallel to the lid to support the locking projection.
3. The projector according to claim 1, wherein the locking convex portion has a columnar shape protruding integrally from the support portion in a direction intersecting the lid. The lid is closed in a direction along the one surface portion, and the lid integrally includes a support portion disposed substantially parallel to the lid to support the locking projection.
The locking projection is integrally projected from the support portion in a direction intersecting the lid, and from the upstream side to the downstream side in the insertion direction of the plate-like portion with respect to the insertion concave portion, from the support portion. The projector according to claim 1, wherein the projector has a tapered surface in which a protruding amount increases. A projector that houses a lamp for projecting an image and has a housing provided with an opening for attaching and detaching the lamp on one surface and a lid that can open and close the opening is attached to the projector. It is a ceiling hanging structure that hangs from an upper structure through a fixture,
The one surface portion is integrally formed with an inverted L-shaped insertion recess for slidingly inserting the fixture.
The lid is integrally formed with a locking projection to lock the fixture with the closed lid,
The fixture is provided with a plate-like portion in which a hole is formed,
The plate-like portion arranged in the horizontal direction is inserted into the insertion recess along the one surface portion directed upward,
The ceiling-suspended structure, wherein the locking projection is inserted into the hole.

Images