JP4249736B2 - Cover mounting structure - Google Patents

Description

  The present invention relates to a structure for attaching a cover to a housing, and more particularly, to a structure for attaching a cover with high safety and good workability.

  Conventionally, projection apparatuses using a lamp as a light source have been widely used from projectors to projectors, including projectors. In recent years, the use of projection display devices has expanded from presentation of materials in conferences and the like to home projectors that replace televisions, and even movie theaters. As the light source, semiconductor light emitting devices such as LEDs (light emitting diodes) and semiconductor lasers have recently been used, but discharge lamps such as high pressure mercury lamps and metal halide lamps are often used. .

  Since the discharge lamp becomes hot and its life is limited and needs to be replaced, an opening for maintenance is provided in the housing near the discharge lamp installation location, and the cover can open and close at all times. Covering.

  One conventional cover mounting structure is, for example, a hook mounting structure that is releasable with a finger as shown in a conventional example described in Patent Document 1.

  Further, one of the conventional cover mounting structures is a screw mounting structure. FIG. 14 is a schematic partially exploded perspective view of a projection apparatus showing a structure for attaching a lamp cover to a conventional case. The projection 57 of the lamp cover 53 of the projection device 51 engages with the lamp cover projection insertion hole 56 of the apparatus housing 52, and is fixed to the apparatus housing 52 by a screw 54. The device housing 52 is provided with an insert nut 55 that is screwed with the screw 54 when the lamp cover 53 is fixed.

Here, the lamp cover is described as an example, but a similar structure is used for a cover other than the lamp cover.
Japanese Patent No. 3233770 (paragraph number 0003, FIG. 7)

  However, the mounting structure using a hook that can be released with a finger has a problem of low safety. The reason is that anyone can easily remove the lamp cover, and the dangerous lamp part is easily exposed at high temperature.

  Further, the mounting structure using screws has the following problems. The first problem is poor workability. The reason is that when attaching and removing the lamp cover 53, an operation of rotating the tool is required to tighten or loosen the screw 54. The second problem is the high cost. The reason is that a screw 54 and an insert nut 55 are required as independent members for attaching the lamp cover. The third problem is that when the device housing is made of plastic, the separability at the time of device disposal is poor. The reason is that when the device housing is made of plastic, it is necessary to press-fit a metal insert nut into the plastic device housing for screw fixing, and as a result, the device housing is not a single material.

  Here, the lamp cover is described as an example, but similar problems other than the lamp cover have the same problem.

  An object of the present invention is to provide a cover mounting structure that has high safety, good removal workability, and good separability at the time of disposal.

The cover mounting structure of the present invention is
A cover mounting structure for a housing, the housing having an opening to which the cover is attached, and the cover and the housing include a first engagement means, a second engagement means, and a third engagement. A first engaging means, a protrusion provided on each of the right and left ends of the cover, a cover protrusion insertion hole provided on an edge of the opening of the housing , And the second engagement means includes a first flange portion provided toward the inside of the housing at an edge portion opposed to the edge portion provided with the cover protrusion insertion hole of the opening portion of the housing; a first hook portion the protrusion of the cover is provided at the end opposite to the end provided consists, a first flange portion for engaging portions of the first hook portion housing A gap portion having an open end is provided on the upper surface, and a first hook portion in the gap portion has a first taper portion . The third engagement means includes a second flange portion provided at the edge of the opening of the housing toward the inside of the housing, and a second hook portion provided at the end of the cover. . The second hook part has elasticity, and the second hook part moves the second hook to the position of engagement and release, and the second hook engageable with the second flange part. A hook operation unit.

The first flange portion is flared opening, the first hook portion has flexibility, the the distal end of the first hook portion upper surface engageable with the lower surface of the first flange portion first hook is provided such, retracting the first hook tip and between the bottom surface of the first hook tip of the first hook when attaching the cover provided with a second tapered portion It has a guide surface for the guide surface to retract the distal end of the first first hook first tapered portion of the hook portion by the inserted tool in the gap portion during removal of the cover provided in the gap portion It may be.

Further, according to the aspect of the application example, the cover is attached to the housing, and the housing has an opening to which the cover is attached. The cover and the housing include the first engaging means and the second engaging device. An engaging means and a third engaging means , wherein the first engaging means is provided on the protrusions provided on the left and right of the one end of the cover, and on the edge of the opening of the housing. a cover protrusion insertion holes are made, the second engagement means is provided toward the inside of the housing to the edge facing the edge cover protrusion insertion hole of the opening of the housing is provided the first and the hook portion, a first flange portion which the protrusion of the cover is provided at the end opposite to the end provided consists, a first flange portion and the first hook portions gap portion is provided having an open end to the housing top surface for engagement locations, the first hook portion in the gap portion first taper Having. The third engagement means includes a second flange portion provided at the edge of the opening of the housing toward the inside of the housing, and a second hook portion provided at the end of the cover. . The second hook part has elasticity, and the second hook part moves the second hook to the position of engagement and release, and the second hook engageable with the second flange part. A hook operation unit.

The first flange portion is flared housing side, the first hook portion has flexibility, the the distal end of the first hook portion upper surface engageable with the lower surface of the first flange portion first hook is provided such, retracting the first hook tip and between the bottom surface of the first hook tip of the first hook when attaching the cover provided with a second tapered portion It has a guide surface for the guide surface to retract the distal end of the first first hook first tapered portion of the hook portion by the inserted tool in the gap portion during removal of the cover provided in the gap portion It may be.

  The maximum gap of the gap is desirably 8 mm or less.

  The engaging means may be integrally formed with the cover or the housing and may be formed of the same material, and the cover and / or the housing may be formed of a material having elasticity.

  By providing a hook structure that cannot be released without using a tool, it is not possible to easily remove the cover. By providing a hook structure that can be released simply by inserting a tool, it is only necessary to insert a tool when removing the cover. The hook is released.

  By providing an attachment guide surface at the tip of the hook, when the cover is attached, the hook is fixed simply by pressing the cover.

  Further, by providing a hook structure on the cover or the device casing itself, a cover mounting screw and a metal insert nut for fixing the screw become unnecessary, and the device casing can be formed of a single material.

The cover mounting structure of the present invention has the following effects. That is,
The first effect is that a highly safe structure can be provided. This is because the cover cannot be removed from the casing unless a tool is used.

  The second effect is that workability is improved. The reason is that the hook is fixed simply by pressing the cover, and the hook is released simply by inserting a tool between the cover and the housing.

  The third effect is that the cost is reduced by reducing the number of parts. The reason is that no parts other than the cover are required to attach the cover.

  A fourth effect is that when the apparatus housing is made of plastic, the separability when the apparatus is discarded is improved. The reason is that each of the apparatus housing and the cover can be made of a single material including the engaging member.

  The cover mounting structure according to the present invention provides a highly safe device in which a dangerous part is not easily exposed by providing a hook structure that cannot be released unless a tool is used for the cover. Since it has a structure that can be released simply by inserting it into the insertion hole, it is easy to remove, and by providing a mounting structure with a hook structure, it is possible to reduce costs without the need for other mounting members. Features.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 is a schematic perspective view of a projection apparatus showing a lamp cover mounting structure according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. 3 is a schematic partial exploded perspective view showing a state in which the lamp cover of the projection apparatus of FIG. 1 is removed, FIG. 4 is a schematic perspective view showing an operation of removing the lamp cover of FIG. 1, and FIG. 4 is a cross-sectional view taken along the line BB in FIG. 4, FIG. 6 is a schematic perspective view showing the mounting operation of the lamp cover, and FIG. 7 is a cross-sectional view taken along the line FF in FIG. is there. Here, the lamp cover of the projection apparatus in which the present invention is most effectively used will be described as an example. However, the object is not limited to the lamp cover, and can be applied to the entire cover.

  An opening for lamp inspection and replacement is provided in the apparatus housing 2 in the vicinity of the lamp housing (not shown) of the projection apparatus 1, and the opening is closed by a lamp cover 3. As shown in FIG. 3, projections 7 are provided on the left and right sides of one end of the lamp cover 3, and lamp cover projection insertion holes 5 that can be engaged with the projections 7 are formed at the edge of the opening of the apparatus housing 2. Is provided. In this example, the projection 7 is provided on the lamp cover 3 and the lamp cover projection insertion hole 5 is provided on the apparatus housing 2, but the projection insertion hole is provided on the lamp cover 3. Even if the apparatus housing 2 is provided with a protrusion, there is no problem in the function of the present invention.

  As shown in FIG. 2, the opening inside the apparatus housing 2 is connected to the edge opposite to the edge where the lamp cover projection insertion hole 5 is provided by a side wall 2a perpendicular to the edge. A flange portion 2b projecting in a direction parallel to the upper surface of the device housing 2 is provided on the side, and an end of the lamp cover 3 opposite to the end on which the projection 7 is provided is connected to the device housing when engaged. A hook portion 6 having elasticity that can be engaged with and released from the flange portion 2b of the two opening portions is provided.

  A hook 6d whose upper surface can be engaged with the lower surface of the flange portion 2b is provided at the tip of the hook portion 6, and the hook portion 6 is between the tip that engages with the flange portion 2b of the hook 6d and the bottom surface of the hook portion 6. When pressed against the flange portion 2b for engagement, the mounting guide surface 6b has a taper for pushing the bottom surface of the hook portion 6 in the opening direction against elasticity. A guide rib 6a and a guide rib at the tip for pressing and opening the hook 6d in the opening direction against the elasticity by pressing are provided on the surface of the hook portion 6 facing the vertical side wall 2a of the base opening connected to the lamp cover 3. A tool guide surface 6c is provided from 6a to the upper surface of the lamp cover 3. When the opening of the apparatus housing 2 and the lamp cover 3 are engaged with each other, the vertical side wall 2a of the opening and the lamp cover 3 are provided. The gap formed between the tool guide surface 6c forms a tool insertion hole 4 having a width that does not allow fingers and nails to enter. The width that does not allow fingers and nails to enter is desirably 8 mm or less.

  Next, operation | movement of the attachment structure of the lamp cover of the 1st Embodiment of this invention is demonstrated with reference to FIGS. First, the operation of removing the lamp cover 3 will be described. A tool 9 is inserted into a tool insertion hole 4 provided in the apparatus housing 2 as shown in FIGS. The tool 9 is easier to use if the tip is tapered, but the tool 9 is not limited to this and may be used for other purposes, for example, a driver. Thereby, the tool guide surface 6 c is pushed by the tip of the tool 9. When the tool guide surface 6 c is pushed by the tool 9, the hook portion 6 is gradually inclined in the hook releasing direction 21, and the upper surface of the hook 6 d that is the engaging portion of the hook portion 6 is the engaging portion of the apparatus housing 2. It is released from the lower surface of a certain flange portion 2b. Next, when the tool 9 is tilted in the tool tilt direction 20, the lamp cover 3 is lifted in the lamp cover removal direction 22, and the lamp cover 3 is removed from the apparatus housing 2.

  Next, the operation of attaching the lamp cover will be described. As shown in FIG. 6, the protrusion 7 of the lamp cover 3 is inserted into the lamp cover protrusion insertion hole 5 provided at the edge of the opening of the apparatus housing 2 shown in FIG. Next, as shown in FIG. 7, the lamp cover 3 is pushed in the direction of the lamp cover attaching direction 26. The attachment guide surface 6 b of the hook portion 6 corresponds to the ridge line 4 a of the tool insertion hole 4 of the flange portion 2 b of the apparatus housing 2. When the lamp cover 3 is further pushed in the lamp mounting direction 26, the hook portion 6 is tilted in the hook releasing direction 21 and the hook 6d reaches a predetermined mounting position, and engages with the lower surface of the flange portion 2b of the apparatus housing 2. Then, the lamp cover 3 is attached to the apparatus housing 2.

  In the first embodiment, the hook portion 6 is configured on the lamp cover 3, the flange portion 2 b is configured on the apparatus housing 2, and the hook portion 6 is flexible. Various applications are possible to achieve the objective. For example, a flexible hook portion having a guide surface that becomes an engagement surface at the edge of the opening and that extends toward the tip is provided toward the inside of the housing, and the lower surface of the hook portion is provided at the end of the lamp cover. A flange portion having a top surface that can be engaged and released may be fixedly provided. In addition, a hook portion having a guide surface extending toward the front end at the edge portion of the opening portion as an engaging surface is provided toward the inside of the housing, and the end portion of the lamp cover is flexible and has a hook portion. A flange portion having an upper surface that can be engaged with and released from the lower surface may be provided.

  Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a schematic perspective view of a projection apparatus showing a lamp cover mounting structure according to the second embodiment of the present invention, and FIG. 9 is a sectional view taken along the line CC of FIG. 10 is a cross-sectional view taken along the line DD in FIG. 8, FIG. 11 is a schematic partially exploded perspective view showing a state in which the lamp cover of the projection apparatus in FIG. 8 is removed, and FIG. FIG. 13 is a schematic perspective view showing an operation of removing the lamp cover of FIG. 8, and FIG. 13 is a cross-sectional view taken along line EE of FIG.

  In the first embodiment, there is one hook portion 6 for engaging the lamp cover 3 with the apparatus housing 2, but in the second embodiment, the lamp cover 13 is engaged with the apparatus housing 12. In addition to the hook portion 16 that is the same as the hook portion 6 of the first embodiment, the hook portion is provided with a hook portion 18 on a side orthogonal to the side of the lamp cover 13 on which the hook portion 16 is provided. The second hook portion 18 can be disposed on any side of the lamp cover 13.

  The second hook portion 18 may have a structure that can be released with a finger. When two hook portions are provided in this way, the lamp cover 13 is not immediately released even if the hook portion 16 is removed due to malfunction or the like. In addition, since it is necessary to work with both hands at the same time, it is possible to provide a lamp cover mounting structure with a higher safety.

  Next, the configuration and operation of the lamp cover mounting structure according to the second embodiment of the present invention will be described with reference to the drawings. Since the mounting structure of the lamp cover of the second embodiment is the same as that of the first embodiment except that two hook portions are provided, detailed description of common parts is omitted.

  First, the configuration will be described. As shown in FIG. 11, the tool housing 12 has a tool insertion hole 14 and a lamp cover protrusion insertion hole 15 that are large enough to prevent fingers and nails from entering the lamp cover 13 when the lamp cover 13 is attached. Is provided. The lamp cover 13 is provided with a hook portion 16, a protrusion portion 17, and a hook portion 18.

  As shown in FIG. 10, the hook portion 18 is formed in a U-shape downward with the edge of the lamp cover 13 as one end, and engages with the lower surface of the flange portion 12b of the opening of the apparatus housing 12 near the center of the other end. A hook 18b is formed, and the hook portion 18 at the upper part of the hook 18b protrudes from the opening to form a hook operation portion 18a. The hook operation part 18a protrudes from the outer surface of the apparatus housing 12 so that the hook part 18 can be pushed with a finger. Here, the hook operation unit 18a protrudes from the outer surface of the apparatus housing 12 so that it can be pushed by a finger. However, the hook operation unit 18a may have a concave shape so that the hook operation unit 18a does not protrude. . The arrangement of the hook part 16, the hook part 18 and the protrusion part 17 is not limited to any arrangement pattern as long as the conditions that the protrusion part 17 is provided on the opposite edge of either the hook part 16 or the hook part 18 are satisfied. Is possible. The hook portion 18 may be provided at a plurality of locations as long as it can be operated with both hands simultaneously with the hook portion 16.

  Next, the operation of removing the lamp cover 13 will be described. As shown in FIG. 10, the hook operation portion 18 a of the hook portion 18 of the lamp cover 13 is pushed with a finger in the direction of the hook release direction 25. As a result, the hook 18b of the hook portion 18 is released from the flange portion 12b. Simultaneously with this operation, the tool 19 is inserted into the tool insertion hole 14 provided in the apparatus housing 12 as shown in FIG. As a result, the tool guide surface 16c is pushed by the tool 19 as shown in FIG. When the tool guide surface 16c is pushed by the tool 19, the hook portion 16 is gradually tilted in the hook releasing direction 21, and the hook is released. Next, when the tool 19 is tilted in the tool tilt direction 20, the lamp cover 13 is lifted in the lamp cover removal direction 22, and the lamp cover 13 is removed from the apparatus housing 12. Thus, since it is necessary to perform two operations simultaneously, the operation with one hand becomes difficult, and the operation of removing the lamp cover 13 becomes safer.

  As in the first embodiment, the mounting operation inserts the projection 17 of the lamp cover 13 into the lamp cover projection insertion hole 15 provided in the apparatus housing 12 shown in FIG. Next, the lamp cover 13 is pushed in the lamp cover mounting direction. In the hook portion 16, the attachment guide surface 16 b is curved inwardly on the ridge line 14 a of the tool insertion hole 14 of the apparatus housing 12. Also in the hook portion 18, the lower tapered portion of the hook 18 b comes into contact with the edge portion of the apparatus housing 12 and curves inward. By further pushing the lamp cover 13 in the lamp cover mounting direction, the hook portion 16 and the hook portion 18 are engaged with the flange portion 12b of the device housing 12 beyond the edge of the device housing 12, and the lamp cover 13 is moved to the device. It is attached to the housing 12.

  The cover mounting structure to the housing of the present invention is not only applied as a lamp cover mounting structure of a projection device from a slide projector to a projection device including a projector having a built-in lamp as described in the embodiment. The present invention can be widely applied to attachment of a general casing cover. Although the lamp covers 3 and 13 have been described as having a rectangular shape, the present invention is not limited to this, and other shapes such as a circle or an ellipse can be applied.

It is a typical perspective view of the projection apparatus which shows the attachment structure of the lamp cover of the 1st Embodiment of this invention. It is sectional drawing along the AA line of FIG. It is a typical partial exploded perspective view which shows the state which removed the lamp cover of the projection apparatus of FIG. It is a typical perspective view which shows the operation | movement which removes the lamp cover of FIG. It is sectional drawing along the BB line of FIG. It is a typical perspective view which shows the attachment operation | movement of a lamp cover. It is sectional drawing along the FF line of FIG. It is a typical perspective view of the projection apparatus which shows the attachment structure of the lamp cover of the 2nd Embodiment of this invention. It is sectional drawing along CC line of FIG. It is sectional drawing along the DD line of FIG. It is a typical partial exploded perspective view which shows the state which removed the lamp cover of the projection apparatus of FIG. It is a typical perspective view which shows the operation | movement which removes the lamp cover of FIG. It is sectional drawing along the EE line of FIG. It is a typical partial exploded perspective view of the projection apparatus which shows the attachment structure of the lamp cover to the housing | casing of a prior art example.

Explanation of symbols

1, 11, 51 Projection device 2, 12, 52 Device housing 2a, 12a Side wall portion 2b, 12b Flange portion 3, 13, 53 Lamp cover 4, 14 Tool insertion hole 4a, 14a Tool insertion hole ridge line 5, 15, 56 Lamp cover projection insertion hole 6, 16, 18 Hook portion 6a, 16a Guide rib 6b, 16b Mounting guide surface 6c, 16c Tool guide surface 6d, 16d, 18b Hook 7, 17, 57 Projection portion 9, 19 Tool 18a Hook operation portion 20 Tool tilt direction 21, 25 Hook release direction 22 Lamp cover removal direction 26 Lamp cover attachment direction 54 Screw 55 Insert nut

Claims (7)

A structure for attaching a cover to a housing,
The housing has an opening to which the cover is attached,
The cover and the housing include first engagement means, second engagement means, and third engagement means ,
It said first engagement means includes a projecting portion provided on the respective left and right end portions of the cover, and the housing the cover protrusion insertion holes provided in the edge of the opening of the consist,
It said second engagement means, said first flange portion to which the cover protrusion insertion hole of the opening of the housing is provided toward the inside of the housing to the edge opposite to the edge provided When the first hook portion to which the projecting portion of the cover is provided on the end opposite the end provided consists,
Wherein the first flange portion for engaging portions of the first hook portion gap portion is provided having an open end to the housing top surface,
Wherein the first hook portion have a first tapered portion in the gap portion,
The third engaging means includes a second flange portion provided at an edge of the opening of the housing toward the inside of the housing, and a second hook provided at an end portion of the cover. And consists of
The second hook portion has elasticity, the second hook portion is engaged with the second flange portion, and the second hook portion is in a position of engagement and release. cover mounting structure, characterized by chromatic and hook operating portion to move to, the. The first flange portion protrudes from the opening,
The first hook portion is flexible, the first of the upper surface at the tip of the hook portion first flange portion of the lower surface engageable with the first hook is provided, said first A second taper portion is provided between the tip of the hook and the bottom surface of the first hook portion, and serves as a guide surface for retreating the tip of the first hook when the cover is attached,
It said first taper portion of the first hook portion provided in the gap portion becomes a guide surface to retract the distal end of the first hook by the inserted tool the gap portion during removal of the cover The cover mounting structure according to claim 1. A structure for attaching a cover to a housing,
The housing has an opening to which the cover is attached,
The cover and the housing include first engagement means, second engagement means, and third engagement means ,
It said first engagement means includes a projecting portion provided on the respective left and right end portions of the cover, and the housing the cover protrusion insertion holes provided in the edge of the opening of the consist,
It said second engagement means, said first hook portion to which the cover protrusion insertion hole of the opening of the housing is provided toward the inside of the housing to the edge opposite to the edge provided When a first flange portion which the protrusion of the cover is provided on the end opposite the end provided consists,
Wherein the first hook portion in engagement portion between the first flange portion gap portion is provided having an open end to the housing top surface,
Wherein the first hook portion have a first tapered portion in the gap portion,
The third engaging means includes a second flange portion provided at an edge of the opening of the housing toward the inside of the housing, and a second hook provided at an end portion of the cover. And consists of
The second hook portion has elasticity, the second hook portion is engaged with the second flange portion, and the second hook portion is in a position of engagement and release. cover mounting structure, characterized by chromatic and hook operating portion to move to, the. The first flange portion projects to the housing side,
The first hook portion is flexible, the first of the upper surface at the tip of the hook portion first flange portion of the lower surface engageable with the first hook is provided, said first A second taper portion is provided between the tip of the hook and the bottom surface of the first hook portion, and serves as a guide surface for retreating the tip of the first hook when the cover is attached,
It said first taper portion of the first hook portion provided in the gap portion becomes a guide surface to retract the distal end of the first hook by the inserted tool the gap portion during removal of the cover The cover mounting structure according to claim 3.   The cover attachment structure according to any one of claims 1 to 4, wherein a maximum gap of the gap portion is 8 mm or less. The cover attachment structure according to any one of claims 1 to 5 , wherein the engaging means is formed of the same material integrally with the cover or the casing. The cover and / or wherein the housing is formed of a material having elasticity, the cover mounting structure of claim 6.

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