JP3087182U - Projector, electronic equipment, height adjustment mechanism - Google Patents

Abstract

(57) [Problem] To provide a projector capable of reducing the operation force at the time of height adjustment, and requiring no operation even when the height is largely changed, and which can easily change the projection angle. A height adjustment mechanism includes a slide member supported by a main body, a spring biasing the slide member, and an adjustment dial engageable with the slide member.
And a rubber base 4 that rotatably supports the adjustment dial 3. In the normal state, the thread 2c of the slide member 2 and the thread 3e of the adjustment dial 3 are engaged by the force of the spring 5. Since the adjustment dial 3 is supported by the rubber base 4 and does not abut on the installation surface, the operation of the adjustment dial 3 can be easily performed even when the installation surface is rough. When the slide member 2 is pushed in, the engagement of the screw portions 2c and 3e is released, and the adjustment dial 3 is in a free state. Therefore, when the height is largely changed, the adjustment dial 3 is not rotated many times. I'm done.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a height adjusting mechanism in a projector or the like.

[0002]

[Prior art]

 FIG. 11 is a perspective view showing an example of a conventional projector. In FIG. 11, 90 is a projector, 91 is a main body of the projector 90, 92 is a projection lens, and 93 is a dial for height adjustment. FIG. 11A shows a state where the main body 91 is placed horizontally on the installation surface. FIG. 11B shows a state in which the main body 91 is placed at a fixed angle to the installation surface as a result of adjusting the height by turning the dial 93. By operating the dial 93 in this way, the inclination of the main body 91 is adjusted so that the image projected from the projection lens 92 is correctly projected on a screen (not shown).

FIG. 12 is a sectional view showing a height adjusting mechanism in the projector 90. As shown in FIG. 12A, the height adjusting mechanism includes the above-described dial 93 and a screw 94 with which the dial 93 is engaged. The dial 93 has a screw portion 93a with which the screw portion 94a of the screw 94 is engaged, and a concave portion 93b in which the head portion 94b of the screw 94 is housed. A screw hole 91 a is provided on the lower surface of the main body 91. As shown in FIG. 12B, the screw 94a of the screw 94 is screwed into the screw hole 91a of the main body 91, and the screw 94 is fixed to the main body 91. When the dial 93 is rotated in this state, the screw 93a of the dial 93 and the screw 94a of the screw 94 are engaged, and the dial 93 moves up and down according to the direction of rotation. Thereby, the distance between the lower surface of the main body 91 and the installation surface 95 changes, and the inclination of the projector 90 can be adjusted.

[0004]

[Problems to be solved by the invention]

 However, since the projector 90 has a structure in which the height is adjusted only by rotating the dial 93, when the height is largely changed, the dial 93 must be rotated many times. It takes time and effort to adjust the height. Further, since the dial 93 is in contact with the installation surface 95 to support the main body 91, when the installation surface 95 is rough, the friction between the dial 93 and the installation surface 95 increases. In order to adjust the height, a large force must be applied to the dial 93, which is not user-friendly.

On the other hand, JP-A-10-286134, JP-A-11-46903, and JP-A-1-218406 also disclose mechanisms for adjusting the height of OA equipment and furniture. However, in Japanese Patent Application Laid-Open No. H10-286134, there is a problem similar to that of the projector 90 described above because the height is adjusted only by rotating the screw associated with the main body. In Japanese Patent Application Laid-Open No. 11-46903, a hemispherical portion having small sliding friction is provided at the lower end of a screw shaft connected to a main body, and the height adjustment is performed by rotating the screw shaft, whereby the operating force at the time of height adjustment is adjusted. According to Japanese Patent Application Laid-Open No. Hei 1-218406, the dial can be rotatably supported on a footrest that comes into contact with the floor, so that the operating force for height adjustment can be reduced. If a change is to be made, the amount of rotation of the screw shaft or dial increases as in the conventional projector 90.

The present invention solves the above-mentioned problem, and the problem is that the operation force at the time of height adjustment can be reduced, and the operation is troublesome even when the height is largely changed. It is an object of the present invention to provide a projector that can easily change the projection angle without taking any action.

[0007]

[Means for Solving the Problems]

 The projector according to the present invention has a main body for projecting an image, and a height adjusting mechanism provided on a lower surface of the main body, and the height adjusting mechanism is an operation member movably supported with respect to the main body. And an adjustment dial engageable with the operation member, and a support member rotatably supporting the adjustment dial in contact with the installation surface of the main body. When the operation member is not operated, the screw portion of the operation member and the screw portion of the adjustment dial are engaged, and the height is adjusted by rotating the adjustment dial. Further, when the operation member is operated, the engagement between the screw portion of the operation member and the screw portion of the adjustment dial is released, so that the adjustment dial can be moved up and down.

[0008] With this configuration, the adjustment dial is rotatably supported by the support member and does not directly contact the installation surface of the projector, so that the adjustment dial can be easily adjusted regardless of the state of the installation surface on which the projector is installed. It can be rotated and does not require extra force for operation. When the operation member is not operated, the screw of the operation member and the screw of the adjustment dial are engaged. Therefore, when the adjustment dial is rotated, the operation member moves up and down relative to the adjustment dial. The height can be adjusted finely. On the other hand, when the operating member is operated, the screw portion of the operating member is disengaged from the screw portion of the adjusting dial, and the adjusting dial can be moved up and down. It can be moved only freely. Therefore, even when the height is largely changed, it is not necessary to turn the adjustment dial many times, thereby reducing the time and labor for height adjustment.

The adjustment dial includes, for example, a gripper that can be gripped and rotated by hand, a rod provided integrally with the gripper and having a threaded portion that engages with a threaded portion of the operation unit. A grip portion is provided, and a coupling portion that is continuous with the support member is provided, and the grip portion is rotatably supported by the support member. Alternatively, the first rod includes a hollow first rod provided integrally with the gripping part and having a threaded part engaged with the threaded part of the operation part, and a coupling part coupled to the support member. And a second rod inserted into the hollow part of the rod, the gripping part may be rotated about the second rod as an axis. According to the former, the structure of the adjustment dial is simplified, and according to the latter, there is no friction between the connecting portion and the support member, so that the grip portion can be easily rotated.

[0010] It is preferable that a protrusion is provided on one of the upper surface of the support member and the lower surface of the grip portion along the rotation direction of the grip portion. According to this, since the grip and the support member abut on the protrusion, the contact area between the two is reduced, the frictional resistance is reduced, and the grip can be rotated with a smaller force. The projection may be a continuous projection along the rotation direction or a discontinuous projection.

In addition, instead of providing the projection, a sheet having a small coefficient of friction may be interposed between the support member and the grip. This also reduces the friction between the grip and the support member, and allows the grip to be rotated with a smaller force.

Further, instead of providing the protrusions and the sheet as described above, a lubricant may be mixed into the support member. This also reduces the friction between the gripper and the support member, so that the gripper can be rotated with a smaller force.

In a typical embodiment of the present invention, the height adjusting mechanism includes a slide member slidably supported on the main body, a spring for biasing the slide member, and a engagement with the slide member. A possible adjustment dial and a rubber base rotatably supporting the adjustment dial are provided. The slide member has an elongated hole extending in the sliding direction, and a threaded portion is formed on an inner wall of the elongated hole inward of the main body. The spring is interposed between the slide member and the main body, and constantly biases the slide member toward the outside of the main body. The adjusting dial has a grip portion that can be gripped and rotated by hand, a rod that is provided integrally with the grip portion and has a thread portion that is engaged with the thread portion of the slide member, and an integrated dial. And a connecting portion that is connected to the rubber base. The holding part is rotatably supported by the rubber base, and the rod is inserted into the elongated hole of the slide member. The rubber base is formed in a hemispherical shape, and the upper flat surface rotatably supports the grip portion of the adjustment dial, and the lower spherical surface comes into contact with the installation surface of the main body.

In a state where the slide member is urged to the outside of the main body by the spring, the screw portion of the slide member and the screw portion of the rod of the adjustment dial are engaged, and the vertical movement of the rod is restricted. In addition, the height of the slide member is adjusted by the vertical movement of the slide member relative to the rod by the rotation of the grip portion of the adjustment dial. When the slide member is pushed inward of the main body against the spring, the engagement between the screw part of the slide member and the screw part of the rod of the adjustment dial is released, and the adjustment dial becomes movable vertically. . In this state, after the adjustment dial is moved upward and downward by an arbitrary amount and the pressing of the slide member is released, the slide member returns to the original position by the force of the spring, and the screw part of the slide member and the rod of the adjustment dial The screw part of the projector is engaged again, and the projector body is fixed at a predetermined height from the installation surface.

[0015] In this way, the adjustment dial is set in a free state by the pressing operation of the slide member, the height is adjusted to an arbitrary value, and then the pressing operation is released, so that the slide member is automatically engaged with the adjustment dial by the spring. In addition, since the height is fixed, even if the height is greatly changed, it is not necessary to turn the adjustment dial many times, and the adjustment time and labor can be reduced. Further, since the supporting member is formed of a hemispherical rubber base, the projector main body can be stably supported on the installation surface.

The present invention can also be applied to a case where the height of the main body with respect to the installation surface is adjusted in electronic devices other than the projector and other devices. In this case, the height adjusting mechanism in the projector described above can be used as it is.

[0017]

[Embodiment of the invention]

 FIG. 1 is a perspective view showing an example of the projector according to the present invention. In FIG. 1, 100 is a projector, 101 is a main body of the projector 100, 102 is a projection lens, 2 is a slide member as an operation member, 3 is an adjustment dial, and 4 is a rubber stand as a support member. FIG. 1A shows a state where the main body 101 is placed horizontally on an installation surface. FIG. 1B shows a state in which the main body 101 is placed at a fixed angle with respect to the installation surface as a result of adjusting the height by turning the adjustment dial 3. By operating the adjustment dial 3 in this manner, the tilt of the main body 101 is adjusted so that the image projected from the projection lens 102 is correctly projected on a screen (not shown).

FIG. 2 is a view showing the structure of the adjustment dial 3 and the rubber stand 4, wherein (a) is a perspective view and (b) is a partial cross-sectional view. The adjusting dial 3 has a gripping portion 3a which can be gripped and rotated by hand, a rod 3b provided integrally with the gripping portion 3a and formed with a screw portion 3e, and a locking stopper provided at the tip of the rod 3b. It comprises a member 3c and a connecting portion 3d provided integrally with the holding portion 3a and connected to the rubber base 4. Each part of the adjustment dial 3 may be integrally formed of resin or the like, or may be integrally formed by connecting different parts. The rubber base 4 is provided with a concave portion 4a, and the adjusting dial 3 and the rubber base 4 are connected to each other by fitting the coupling portion 3d into the concave portion 4a. Since there is a gap between the coupling portion 3d and the inner wall of the concave portion 4a, even if the adjustment dial 3 rotates, the rubber base 4 does not rotate. The rubber base 4 is formed in a hemispherical shape so that the upper flat surface rotatably supports the grip portion 3a of the adjustment dial 3 and the lower spherical surface comes into contact with the installation surface of the main body 101. It has become.

FIG. 3 is a diagram showing a configuration of the height adjusting mechanism. The height adjustment mechanism 1 includes a slide member 2, an adjustment dial 3, a rubber base 4, and a spring 5. The slide member 2 includes a base 2a formed in a plate shape, an elongated hole 2b formed in the base 2a, a pressing portion 2d provided at one end of the base 2a, and formed on both sides of the base 2a. A ridge 2e (only one side is shown) and a pair of hooks 2f provided at the other end of the base 2a are provided. The elongated hole 2b extends in the sliding direction X, Y of the sliding member 2, and a screw portion 2c is formed on the inner wall in the sliding direction X (inward of the main body 101). No screw portion is formed on the inner wall in the sliding direction Y (outward direction of the main body 101). The adjustment dial 3 and the rubber base 4 are the same as those in FIG. The rod 3b of the adjustment dial 3 is inserted into the elongated hole 2b, and the screw 3e of the rod 3b and the screw 2c of the slide member 2 can be engaged. 3A shows a normal state in which the slide member 2 is not operated, FIG. 3B shows a state in which the slide member 2 is pushed in the sliding direction X, and FIG. 3) shows a state in which the adjustment dial 3 is relatively moved downward from the state of FIG.

FIG. 4 is a cross-sectional view showing a state where the height adjustment mechanism 1 is attached to the lower surface of the main body 101 of the projector 100, and corresponds to the state shown in FIG. 4A is a side sectional view, and FIG. 4B is a plan sectional view. On the lower surface of the main body 101, a concave portion 101a for accommodating the base 2a of the slide member 2 and the spring 5 is provided, and a groove 101g is formed in the concave portion 101a as shown in FIG. ing. Then, ridges 2e (FIG. 3) formed on both sides of the base 2a of the slide member 2 are inserted into the grooves 101g, and the slide member 2 is slidably held by the main body 101. Further, the hook 2f of the slide member 2 is locked to the step of the concave portion 101a, so that the slide member 2 is prevented from being pulled out of the main body 101 in the outward direction. At this time, the spring 5 is interposed between the slide member 2 and the main body 101, and constantly urges the slide member 2 toward the outside of the main body 101 (Y direction in FIG. 3, left direction in FIG. 4).

Next, the procedure for adjusting the height by the height adjusting mechanism 1 will be described. In the normal state, the height adjustment mechanism 1 is in the state of FIGS. 3A and 4 as described above, and the slide member 2 is urged in the Y direction by the spring 5, so The thread 2c of the ride member 2 and the thread 3e of the adjustment dial 3 are engaged. By this engagement, the vertical movement of the rod 3b is restricted, and the main body 101 is supported by the adjustment dial 3 and the rubber stand 4, and is fixed while maintaining a constant height h1 from the installation surface F.

In this state, when the grip portion 3a of the adjustment dial 3 is gripped and rotated, the rod 3b also rotates integrally. At this time, as described above, the rubber base 4 does not rotate and remains stationary. Due to the rotation of the rod 3b, the slide member 2 moves up and down relative to the rod 3b while maintaining the engagement between the screw portion 3e and the screw portion 2c. As a result, the main body 101 on which the slide member 2 is supported moves up and down, and the height h1 can be adjusted according to the rotation direction and the amount of rotation of the grip portion 3a. Here, since the adjustment dial 3 is rotatably supported by the rubber base 4 and does not directly contact the installation surface F, even if the installation surface F is rough, the rotation of the adjustment dial 3 is not affected. Therefore, the adjustment dial 3 can be always rotated with a constant force, and no extra force is required for the rotation operation.

Next, the pressing portion 2 d of the slide member 2 is pressed from the state shown in FIGS. 3A and 4 so that the slide member 2 slides against the force of the spring 5 in the sliding direction X (inward direction of the main body 101). 3), the engagement between the screw portion 2c of the slide member 2 and the screw portion 3e of the rod 3b of the adjustment dial 3 is released, as shown in FIG. FIG. 5 shows a sectional view at this time. 5A is a side sectional view, and FIG. 5B is a plan sectional view, and the same parts as those in FIG. 4 are denoted by the same reference numerals. By releasing the engagement of the screw portions 2c and 3e in this manner, the adjustment dial 3 can be freely moved in the vertical direction, and can be moved by an arbitrary amount in the vertical direction relative to the slide member 2. Is possible. FIG. 3C shows a state where the adjustment dial 3 is relatively lowered to the lowest position. FIG. 6A is a side sectional view at this time, and the height from the installation surface F is changed to h2. In the state shown in FIG. 3C, the retaining member 3c abuts on the opening edge of the elongated hole 2b, so that the adjustment dial 3 is prevented from coming off the slide member 2.

After the adjustment dial 3 is moved up and down relative to the slide member 2 by a predetermined amount in this manner, when the pressing force of the pressing portion 2 d is released, the slide member 2 is returned to the original position by the force of the spring 5. Then, the screw portion 2c of the slide member 2 and the screw portion 3e of the adjustment dial 3 are engaged again as shown in FIG. Thereby, the height from the installation surface F of the main body 101 is fixed to h2. Therefore, even when it is desired to change the height of the main body 101 to a large value, it is not necessary to turn the adjustment dial 3 many times, and after pressing the slide member 2 to relatively move the adjustment dial 3 up and down, The coarse adjustment of the height can be performed only by releasing the pressing of 2.

FIG. 7 is a sectional view showing another embodiment of the adjustment dial 3. In the figure, the same parts as those in FIG. 2 are denoted by the same reference numerals. The adjusting dial 3 includes a grip 3a, a hollow rod 31 (first rod) continuous with the grip 3a, and a rod 32 (second rod) inserted into the hollow 31a of the rod 31. And a connecting member 32d provided at the lower end of the rod 32 and connected to the rubber base 4. The rod 31 is formed with a screw portion 31b that engages with the screw portion 2c of the slide member 2, and the grip portion 3a is rotatably supported on the rubber base 4 around the rod 32. The rod 32 is supported by the rubber base 4 so as not to move easily by press-fitting the connecting portion 32d into the rubber base 4 or the like.

When the adjustment dial 3 shown in FIG. 7 is used, the procedure for adjusting the height is the same as the procedure described with reference to FIGS. However, in the case of FIGS. 3 to 6, since the grip 3a and the coupling 3d are provided integrally, the coupling 3d also rotates together with the rotation of the grip 3a. Since the load of the main body 101 is also applied to the connecting portion 3d via the screw portions 2c and 3e, a large amount of force is required to rotate the grip portion 3a by the friction between the connecting portion 3d and the rubber base 4. And On the other hand, in the case of FIG. 7, since the rod is divided into two parts, the grip part 3a and the coupling part 32d are separated from each other. Therefore, even if the grip part 3a rotates, the coupling part 32d does not rotate. Further, the load of the main body 101 is not applied to the connecting portion 32d. Therefore, no friction is generated between the coupling portion 32d and the rubber base 4 when the grip portion 3a is rotated, so that the force applied to the grip portion 3a can be reduced, and the height can be easily adjusted.

FIGS. 8A and 8B are diagrams showing another embodiment of the adjustment dial 3, wherein FIG. 8A is a cross-sectional view, and FIG. 8B is a bottom view of a grip portion. In the figure, the same parts as those in FIG. 2 are denoted by the same reference numerals. In this example, a protrusion 6a is provided on the lower surface of the grip 3a of the adjustment dial 3 along the rotation direction of the grip 3a. As shown in FIG. 8B, the projection 6a is formed of two rows of concentric ribs. According to this embodiment, since the grip portion 3a and the rubber base 4 abut on the protrusion 6a, the contact area between them is reduced, and the grip portion 3a can be rotated with a smaller force.

FIGS. 9A and 9B are diagrams showing another embodiment of the adjustment dial 3, wherein FIG. 9A is a cross-sectional view, and FIG. 9B is a bottom view of a grip portion. In the figure, the same parts as those in FIG. 8 are denoted by the same reference numerals. In this example, a discontinuous projection 6b is provided on the lower surface of the grip 3a of the adjustment dial 3 as shown in FIG. 9B along the rotation direction of the grip 3a. Also in this case, since the grip portion 3a and the rubber base 4 abut on the protrusion 6b, the contact area between them is reduced, and the grip portion 3a can be rotated with a smaller force.

In FIGS. 8 and 9, the protrusions 6 a and 6 b are formed on the lower surface of the grip portion 3 a. However, the protrusions may be formed on the upper surface of the rubber base 4.

FIG. 10 is a sectional view showing another embodiment of the adjustment dial 3. In the figures, the same parts as those in FIGS. 8 and 9 are denoted by the same reference numerals. In this example, a sheet 7 made of a material such as Teflon (registered trademark) having a small friction coefficient is interposed between the lower surface of the grip portion 3a of the adjustment dial 3 and the upper surface of the rubber base 4. According to this, the friction between the grip portion 3a and the rubber base 4 is reduced, and the grip portion 3a can be rotated with a smaller force.

In order to reduce the force required for rotating the grip 3a, various means other than those described above are conceivable. For example, by using rubber mixed with a lubricant as a material of the rubber base 4, the friction between the grip portion 3 a and the rubber base 4 can be reduced. In this case, the friction can be further reduced by using a resin material impregnated with a lubricant for the grip portion 3a.

In the above embodiment, the projector is used as an example. However, the present invention can be applied to electronic devices other than the projector and other devices. The mechanism of the embodiment can be used as it is.

[0033]

[Effects of the Invention] According to the present invention, the adjustment dial can be easily rotated irrespective of the state of the installation surface on which the projector and the like are installed, and even when the height is largely changed, the adjustment dial can be used. There is no need to turn again, which saves time and effort for height adjustment.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an example of a projector according to the invention.

FIG. 2 is a diagram showing a structure of an adjustment dial and a rubber stand.

FIG. 3 is a view showing a height adjusting mechanism according to the present invention;

FIG. 4 is a cross-sectional view illustrating the operation of the height adjustment mechanism.

FIG. 5 is a cross-sectional view illustrating the operation of the height adjustment mechanism.

FIG. 6 is a cross-sectional view illustrating the operation of the height adjustment mechanism.

FIG. 7 is a sectional view showing another embodiment of the adjustment dial.

FIG. 8 is a sectional view showing another embodiment of the adjustment dial.

FIG. 9 is a cross-sectional view showing another embodiment of the adjustment dial.

FIG. 10 is a sectional view showing another embodiment of the adjustment dial.

FIG. 11 is a perspective view showing an example of a conventional projector.

FIG. 12 is a cross-sectional view illustrating a height adjusting mechanism of a conventional projector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Height adjustment mechanism 2 Slide member 2b Slot 2c Screw part 3 Adjustment dial 3a Grip part 3b Rod 3d Coupling part 3e Screw part 4 Rubber stand 5 Spring 6a, 6b Projection part 7 Sheet 100 Projector 101 Main body F Installation surface

Claims (9)

[Utility model registration claims] 1. A projector comprising: a main body for projecting an image; and a height adjusting mechanism provided on a lower surface of the main body, wherein the height adjusting mechanism adjusts a projection angle of the main body. The adjustment mechanism includes a slide member slidably supported by the main body, a spring for biasing the slide member, an adjustment dial engageable with the slide member, and rotatably supporting the adjustment dial. A rubber base, wherein the slide member has a long hole extending in the slide direction, and a screw portion is formed on an inner wall of the main body in the long hole in an inward direction; Interposed between the main body and the main body, and constantly urges the slide member in the outward direction of the main body. A rod provided integrally with a threaded portion for engaging with a threaded portion of the slide member; and a coupling portion provided integrally with the gripping portion and coupled to the rubber stand, The part is rotatably supported by a rubber base, and the rod is inserted into an elongated hole of the slide member. The rubber base is formed in a hemispherical shape, and the upper flat surface is rotatable about the grip part of the adjustment dial. In a state where the lower spherical surface is in contact with the installation surface of the main body and the slide member is urged outward by the spring, the screw portion of the slide member and the screw of the rod of the adjustment dial are supported. And the vertical movement of the rod is regulated, and the rotation of the gripping part of the adjustment dial causes the slide member to move up and down relative to the rod. In the state of being pushed inwardly of the body against the spring, and the engagement between the threaded portion of the rod of the screw portion and the adjustment dial of the slide member is released,
A projector characterized in that the adjustment dial is movable up and down. 2. A projector comprising: a main body for projecting an image; and a height adjusting mechanism provided on a lower surface of the main body, wherein the height adjusting mechanism adjusts a projection angle of the main body. The adjustment mechanism includes an operation member supported by the main body, an adjustment dial engageable with the operation member, and a support member that abuts on an installation surface of the main body and rotatably supports the adjustment dial, In a state where the operation member is not operated, the screw portion of the operation member and the screw portion of the adjustment dial are engaged, and the height is adjusted by rotation of the adjustment dial.In a state where the operation member is operated, the operation is performed. A projector wherein the engagement between the screw portion of the member and the screw portion of the adjustment dial is released, and the adjustment dial is vertically movable. 3. The projector according to claim 2, wherein the adjustment dial is gripped by a hand and rotatable, and is engaged with a screw portion of the operation unit provided integrally with the grip. And a coupling portion provided integrally with the grip portion and coupled to the support member, wherein the grip portion is rotatably supported by the support member via the coupling portion. Projector. 4. The projector according to claim 2, wherein the adjustment dial is gripped by hand and is rotatable, and is provided integrally with the grip and is engaged with a screw portion of the operation unit. A hollow first rod formed with a thread portion to be formed;
A second rod inserted into a hollow portion of the first rod and having a coupling portion coupled to the support member, wherein the grip portion is rotatably supported by the support member about the second rod as an axis. Projector. 5. The projector according to claim 2, wherein one of the upper surface of the support member and the lower surface of the grip portion is provided with a protrusion along the rotation direction of the grip portion. Projector. 6. The projector according to claim 2, wherein a sheet having a small coefficient of friction is interposed between the supporting member and the holding portion. 7. The projector according to claim 2, wherein a lubricant is mixed in the support member. 8. An electronic apparatus comprising: a main body; and a height adjusting mechanism provided on a lower surface of the main body, wherein the height adjusting mechanism adjusts a height of the main body with respect to an installation surface. The adjustment mechanism includes an operation member supported by the main body, an adjustment dial engageable with the operation member, and a support member that abuts on an installation surface of the main body and rotatably supports the adjustment dial, In a state where the operation member is not operated, the screw portion of the operation member and the screw portion of the adjustment dial are engaged, and the height is adjusted by rotation of the adjustment dial.In a state where the operation member is operated, the operation is performed. An electronic device, wherein the engagement between the screw portion of the member and the screw portion of the adjustment dial is released, and the adjustment dial is vertically movable. 9. A height adjusting mechanism provided on a lower surface of an apparatus main body for adjusting a height of the main body with respect to an installation surface, wherein the operation member is supported by the apparatus main body, and is engageable with the operation member. An adjusting dial and a support member that abuts on the installation surface of the apparatus main body and rotatably supports the adjusting dial, and in a state where the operating member is not operated, a screw portion of the operating member and a screw portion of the adjusting dial. Are engaged, the height is adjusted by rotating the adjustment dial, and when the operation member is operated, the engagement between the screw portion of the operation member and the screw portion of the adjustment dial is released, and the adjustment is performed. A height adjustment mechanism characterized in that the dial can be moved up and down.