Image Projection Device

Abstract

To realize an image projection device that is downsized so as to be easily hand-held.SOLUTION: Provided is an image projection device 1 comprising: a projection unit 3 for irradiating light and projecting an image; a control board 6 for controlling the operation of the projection unit 3; a battery 7 for supplying electric power to the projection unit 3 and the control board 6; and a body 2 in which the projection unit 3, the control board 6 and the battery 7 are arranged. In the image projection device 1, the body 2 includes a protrusion 2D that protrudes in a direction of an optical axis L1 of light, with at least a part of the projection unit 3 arranged in the protrusion 2D, any two of the projection unit 3, the control board 6 and the battery 7 are arranged inside of the body 2 in parallel in the direction of the optical axis L1 of light, and any two of the projection unit 3, the control board 6 and the battery 7 are arranged inside of the body 2 in a row in a vertical direction.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to an image projection device. [Background technology]

[0002] 2. Description of the Related Art There is known a technique for projecting an image onto an arbitrary projection surface using a handheld image projection device.

[0003] Patent Document 1 describes a projector that can be held in one hand to project, and that houses an optical unit that projects an image onto a projection surface, a drive circuit that drives the optical unit, and a battery within the housing. Summary of the Invention [Problem to be solved by the invention]

[0004] However, Patent Document 1 does not describe the layout of the optical unit, the drive circuit, or the battery, and does not take into consideration the miniaturization of the device.

[0005] An object of the present invention is to realize a compact image projection device that is easy to hold. [Means for solving the problem]

[0006] In order to solve the above-described problems, an image projection device according to one aspect of the present invention includes a projection unit that irradiates light to project an image, a control unit that controls the operation of the projection unit, a battery that supplies power to the projection unit and the control unit, and a main body in which the projection unit, the control unit, and the battery are disposed, wherein the main body has a convex portion that protrudes in the direction of the optical axis of the light, and at least a part of the projection unit is disposed on the convex portion. The main body has a bottom surface facing downward in the vertical direction and an upper surface facing upward in the vertical direction, the convex portion has an upper surface facing upward in the vertical direction, the upper surface of the main body and the upper surface of the convex portion are continuously connected so that the curvatures of the connected parts match, and the surface where the upper surface of the main body and the upper surface of the convex portion are connected is curved so as to protrude on the side opposite to the bottom surface. [Effects of the Invention]

[0007] This allows the image projection device to be made compact and easy to hold. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view of an image projection device according to an embodiment, viewed from the z-positive side; [Figure 2] 1 is a perspective view of an image projection device according to an embodiment, viewed from the negative z direction; [Figure 3] 1 is a perspective view of an image projection device according to an embodiment, viewed from the x-negative direction. [Figure 4] 1 is a front view of an image projection device according to an embodiment, viewed from the x-positive side; [Figure 5] Exploded perspective view of an image projection device [Figure 6] FIG. 1 is a perspective view showing a state in which the image projection device is held; [Figure 7] 1 is a side view showing a state in which the image projection device is held; [Figure 8] Block diagram of image projection device [Figure 9] Block diagram of a modified example of an image projection device [Figure 10] Vertical cross-sectional view of an image projection device [Figure 11] Enlarged cross-sectional view of the tripod mounting hole [Figure 12] FIG. 10 is a longitudinal cross-sectional view showing a modified example of the tripod mounting hole; [Figure 13] Perspective cross-sectional view of the projection button area [Figure 14] Side cross section of the power button area [Figure 15] A perspective view of the power button and the button group integrally molded part [Figure 16] Diagram explaining how to attach integrally molded parts [Figure 17] Diagram showing how to install the battery [Figure 18] Cross-sectional view showing battery installation [Figure 19] 10A and 10B are diagrams showing modified patterns on the operation surface of the dial; [Figure 20] Perspective cross-sectional view showing the dial mounting position [Figure 21] Cross-sectional view of the vicinity of the tip of the convex part [Figure 22]A diagram explaining how to attach the cover member [Figure 23] FIG. 10 is a longitudinal cross-sectional view showing a first modified example of the internal arrangement; [Figure 24] FIG. 10 is a longitudinal cross-sectional view showing a second modified example of the internal arrangement. [Figure 25] FIG. 10 is a longitudinal cross-sectional view showing a third modified example of the internal arrangement. [Figure 26] FIG. 10 is a vertical cross-sectional view showing a fourth modified example of the internal arrangement. [Figure 27] FIG. 10 is a vertical cross-sectional view showing a fifth modified example of the internal arrangement. [Figure 28] FIG. 10 is a longitudinal cross-sectional view showing a sixth modified example of the internal arrangement. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments will be described with reference to the accompanying drawings. To facilitate understanding of the description, the same components in the drawings will be denoted by the same reference numerals as much as possible, and duplicated descriptions will be omitted.

[0010] In the following description, the x, y, and z directions are perpendicular to each other. The x direction is the projection direction of the image projection device 1. The y direction is the left-right direction of the image projected by the image projection device 1, and is typically the horizontal direction. The z direction is the up-down direction of the image projected by the image projection device 1, and is typically the vertical direction.

[0011] FIG. 1 is a perspective view of the image projection device 1 according to the embodiment, viewed from the z-positive side. FIG. 2 is a perspective view of the image projection device 1 according to the embodiment, viewed from the z-negative side. FIG. 3 is a perspective view of the image projection device 1 according to the embodiment, viewed from the x-negative side. FIG. 4 is a front view of the image projection device 1 according to the embodiment, viewed from the x-positive side. FIG. 5 is an exploded perspective view of the image projection device 1. FIG. 6 is a perspective view showing the image projection device 1 in a held state. FIG. 7 is a side view showing the image projection device 1 in a held state.

[0012] The image projection device 1 shown in FIGS. 1 to 7 is a so-called handy type image projection device that can be held by an operator in one hand to project an image.

[0013] The image projection device 1 comprises a main body 2, a projection unit 3, and a projection button 4 as a first button. The main body 2 is formed in a shape that can be held in one hand. The projection unit 3 projects an image by irradiating light to the outside. This light is called projected light, and this image is called a projected image. The projection button 4 switches the projection unit 3 between a projection state and a non-projection state in response to an operation input. The main body 2 is hollow, and the projection unit 3 and other components are housed inside the main body 2. The projection button 4 may have other functions in addition to the function of switching between the projection state and the non-projection state, and may perform other functions instead of the function of switching between the projection state and the non-projection state depending on the state of the image projection device 1.

[0014] The projection button 4 is disposed on the surface of the main body 2. The projection button 4 is an element that a user physically touches with a finger or the like to input an operation such as pressing down, and in the following description, the projection button 4 may also be referred to as the "operation unit 4" or "switch 4." In other words, the projection button 4 accepts an operation by an operator. The projection button 4 is also connected to a switching unit 18 (see FIG. 8, etc.) provided on an electrical circuit. When the switching unit 18 operates in response to a user operation input to the projection button 4, the line 14 (see FIG. 8) on the electrical circuit is switched between energized and de-energized, thereby switching the projection unit 3 between a projection state and a non-projection state. The operation unit 4 and the switching unit 18 may be configured to be integrally formed as a single switch component, or may be configured to be disposed separately and electrically connected.

[0015] Note that the user operation input to the operation unit 4 includes, for example, a pressing operation. A pressing operation includes an operation of pressing a button, an operation of pressing and sliding, an operation of touching a touch panel, and the like, and also includes an operation in which the operator recognizes that he or she has pressed the operation unit 4.

[0016] In response to the operation of the projection button 4, it is possible to make the projection unit 3 emit light L at a timing desired by the operator, and also to stop the emission of light L.

[0017] The projection unit 3 is installed on a protrusion 2D at the tip of the body 2 in the x-positive direction so that the projection direction is along the longitudinal direction (x-direction) of the body 2. The protrusion 2D protrudes along the longitudinal direction (x-direction) of the body 2. The protrusion 2D is formed integrally with the body 2, and the internal space is connected. The relationship between the body 2 and the protrusion 2D can also be described as the body 2 having the protrusion 2D. The projection unit 3 also includes a lens unit 3A, which is installed so that the lens unit 3A is exposed through an opening 2C provided at the tip 2A of the protrusion 2D in the x-positive direction. The projection unit 3 is installed on the body 2 so that the up-down direction of the image projected from the lens unit 3A is along the z-direction and the left-right direction of the image is along the y-direction. When projecting light to the outside, the axis passing through the center of the lens unit 3A is defined as the optical axis L1. The projection unit 3 includes optical elements such as lenses, and the "optical axis of the projection unit 3" refers, for example, to the optical axis center of these optical elements. It can also be said that the convex portion 2D protrudes along the optical axis of this projection unit 3.

[0018] The projection unit 3 also includes a focus adjustment dial 15, which is exposed to the outside through an opening provided in part of the protrusion 2D. The operator can adjust the focus of the projected image by operating the dial 15.

[0019] Next, the internal structure of the image projection device 1 will be described with reference to FIG.

[0020] 5, the image projection device 1 includes the above-mentioned projection unit 3, a control board 6 (control unit), and a battery 7 (power source) housed inside the main body 2. The control board 6 and the battery 7 are each shaped like a rectangular parallelepiped, and are arranged inside the main body 2 with their heights decreasing in the vertical direction.

[0021] The control board 6 controls the operation of the projection unit 3. The control board 6 can be physically configured as a computer system in which a CPU, RAM, ROM, storage device, interface, etc. are connected via a bus. The various functions of the control board 6 are realized by loading predetermined computer software onto hardware such as the CPU and RAM, thereby reading and writing data from and to the RAM and storage device under the control of the CPU, and operating other components such as the projection unit 3 and external devices via the interface.

[0022] The battery 7 is a power source that supplies power to the projection unit 3 and the control board 6, and is a plate-shaped secondary battery.

[0023] 1 and other figures, in addition to the projection button 4, a power button 11 as a second button and a button group 12 are provided on the surface of the main body 2 on the positive z side. The power button 11 is a button for switching on and off the power supply to the image projection device 1 and for operating the main power function. The power button 11 may have other functions in addition to the main power function, and may perform other functions instead of the main power function depending on the state of the image projection device 1.

[0024] Button group 12 includes multiple buttons for operating each function of the other projection device. Power button 11 is located on the negative x side of projection button 4, and button group 12 is located on the negative x side of power button 11, with each button arranged in the y direction. Button group 12 is a group consisting of multiple buttons, and in this embodiment, it consists of three buttons.

[0025] 3, connectors 13 such as a USB connector and an HDMI (registered trademark) are arranged so as to be exposed on an end surface 2B on the negative X-direction side of the main body 2, and are configured to be connectable to various external devices via wiring. The connectors 13 are installed on, for example, a control board 6.

[0026] 1 to 4, 6, and 7, the main body 2 is provided with an upper tapered portion 21A and a lower tapered portion 22A. The upper tapered portion 21A is a tapered portion extending from the upper surface of the main body 2 toward the side surface. The lower tapered portion 22B is a tapered portion extending from the lower surface B of the main body 2 or the lower surface 2E of the protrusion 2D toward the side surface of the main body 2.

[0027] Providing upper tapered portion 21A and lower tapered portion 22B on main body 2 in this way makes it easier for the user to hold main body 2. Furthermore, handheld projectors (image projection devices 1) are often carried around in bags or pockets. Tapered portions such as upper tapered portion 21A and lower tapered portion 22B make it less likely that the corners of the device will get caught on a bag, pocket, etc. when taking the device in or out.

[0028] In this embodiment, as shown in FIG. 1 and the like, the tapers of the upper tapered portion 21A and the lower tapered portion 22B are provided around the entire periphery of the projector (image projection device 1), but may be provided only on a part of the periphery.

[0029] FIG. 8 is a block diagram of the image projection device 1. As shown in FIG. 8, the projection unit 3 includes a light-emitting unit 31 and a display device 32. The light-emitting unit 31 includes LEDs 31R, 31G, and 31B. The LEDs 31R, 31G, and 31B are light sources of red (R), green (G), and blue (B), respectively. The display device 32 is an image forming unit that forms a projection image using light output from the light-emitting unit 31 and outputs the image to the outside. In this embodiment, a DLP (Digital Light Processing) is used as the display device 32. In the following description, the "display device 32" may also be referred to as the "DLP 32." Note that the light-emitting unit 31 and the DLP 32 may be replaced with other elements capable of performing their respective functions. That is, although an LED is used as the light-emitting unit 31, a halogen lamp or the like may also be used. Furthermore, although a DLP is used as the display device, a liquid crystal display device may also be used.

[0030] In FIG. 8, the information transmission system of the image projection device 1 is indicated by a solid line, the power supply system is indicated by a thick solid line, and the optical system is indicated by a dotted line. As shown in FIG. 8, the information transmission system of the image projection device 1 outputs control signals from the control board 6 to the light-emitting unit 31 and the display device (DLP) 32 of the projection unit 3. In addition, in the power supply system of the image projection device 1, power is first supplied from the battery 7 to the control board 6, and then power is supplied from the control board 6 to the light-emitting unit 31 and the DLP 32 of the projection unit 3 via wiring 14. In particular, in this embodiment, a switching unit 18 is disposed on the wiring 14 between the control board 6 and the projection unit 3. The switching unit 18 can be switched between an ON state and an OFF state by operating a switch 4 serving as an operating unit. FIG. 8 shows the switching unit 18 in an OFF state.

[0031] When the switching unit 18 is in the on state, it supplies power to the light-emitting unit 31 and DLP 32 of the projection unit 3, and when it is in the off state, it stops the supply of power to the light-emitting unit 31 and DLP 32 of the projection unit 3. Meanwhile, regardless of whether the switching unit 18 is on or off, power is always supplied to the control board 6 from the battery 7. As a result, the switching unit 18 can switch the projection unit 3 between a projection state and a non-projection state, i.e., between turning on / off the light-emitting unit 31 and operating / stopping the DLP 32, in accordance with an operation input to the operation unit 4, while maintaining the activation state of the control board 6.

[0032] In this way, the projection unit 3 can be switched between a projection state and a non-projection state in response to the operator's operation of the switch 4 (projection button 4), switching the switching unit 18 between an on state and an off state. Therefore, the image projection device 1 of this embodiment can be appropriately switched to a non-projection state when image projection is not required, even during operation, thereby reducing power consumption, extending the life of the projection unit 3, and reducing heat generation. Furthermore, since the control board 6 remains active even when the projection unit 3 is in a non-projection state, the projection unit 3 can be started up more quickly when switching back to a projection state, compared to a configuration in which both the projection unit 3 and the control board 6 are stopped, such as in a conventional standby mode. This allows images to be projected promptly in response to the operator's switch operation, improving the operability of the device.

[0033] The projection button 4 is a push-button switch. Therefore, while the operator is pressing the projection button 4 (i.e., while the operation unit 4 is being pressed), the projection unit 3 is in a projection state (the light-emitting unit 31 is on and the DLP 32 is in an operating state), and when the operator's hand leaves the switch 4 (i.e., when the operation unit 4 is not being pressed), the projection unit 3 is in a non-projection state (the light-emitting unit 31 is off and the DLP 32 is in a stopped state). This allows the timing when the operator wants to project an image to coincide with the timing when the switch 4 is pressed, providing the operator with a more intuitive feeling of operation using a so-called momentary switch. Furthermore, the switch 4 is a button for the operator to switch between projection and non-projection, and can also be called a projection button.

[0034] 8 illustrates a configuration in which the switching unit 18 switches between the presence and absence of power supply from the control board 6 to both the light-emitting unit 31 and the DLP 32, but the switching unit 18 may be disposed at a position on the wiring 14 where it can switch between the presence and absence of power supply to only one of the light-emitting unit 31 or the DLP 32. It is sufficient for the switching unit 18 to be able to switch between at least a projection state in which an image is projected from the projection unit 3 to the outside, and a non-projection state in which an image is not projected from the projection unit 3 to the outside.

[0035] 9 is a block diagram of a modified example of the image projection device 1. The outline of the block diagram shown in FIG. 9 is similar to that of FIG.

[0036] 9, another configuration example of the switching unit 18 has an MCU 18A that detects pressing of the switch 4, and while it detects pressing of the switch 4, it supplies power to the light-emitting unit 31 and the display device 32, for example, so that the projection state is maintained. While it does not detect pressing of the switch 4, it does not supply power to the light-emitting unit 31 and the display device 32 so that the non-projection state is maintained. In this case, the control board 6 functions as a switching unit that switches between the projection state and the non-projection state.

[0037] In other words, in the configuration shown in Figure 9, the control board 6 serves as a switching unit that switches between energized (on state) and de-energized (off state) the line 14 between the control board 6 and the projection unit 3 in response to an operation input from the switch 4 as an operating unit, and instead of the switching unit 18 that is provided on the line 14 in Figure 8 and performs physical switching, the control board 6 performs the switching electrically.

[0038] The control board 6 can control the projection state and projection off state of the projection unit 3. The control board 6 has an MCU 18A (Micro Controller Unit) built in. The MCU 18A can detect whether the switch 4 electrically connected to the control board 6 is pressed or not pressed.

[0039] Furthermore, in momentary mode, the control board 6 supplies power to the projection unit 3 via the line 14 while the switch 4 is pressed, based on the information on the pressed / unpressed state of the switch 4 detected by the MCU 18A, to put the projection unit 3 into a projection state.

[0040] That is, in the case of the modification shown in FIG. 9, the control board 6 functions as a switching unit that switches between supplying and not supplying power to the projection unit 3 in response to the pressing operation of the switch 4 (operation unit).

[0041] In FIG. 9, switch 4 is connected to ground (GND) and the pressed / unpressed state of switch 4 is detected by a change from the reference voltage, but this is not limiting as long as the pressed / unpressed state of switch 4 can be detected.

[0042] FIG. 10 is a longitudinal cross-sectional view of the image projection device 1. In the image projection device 1 according to the embodiment, the positional relationship among the projection unit 3, control board 6, and battery 7 housed in the main body 2 can be simply expressed as follows. That is, the projection unit 3 is installed on a protrusion 2D that protrudes from the main body 2 in the projection direction of the projection unit 3 (positive x direction, light) (this also includes a configuration in which at least a part of the tip of the projection unit 3 is arranged on the protrusion 2D). Any two of the projection unit 3, control board 6, and battery 7 are arranged in parallel in the direction of the optical axis of light (x direction) within the main body 2, and any two of the projection unit 3, control board 6, and battery 7 are arranged in parallel in the vertical direction (z direction) of the image projected by the projection unit 3 within the main body 2. Of these positional relationships, particularly in this embodiment, as shown in FIG. 10, the control board 6 is arranged on the opposite side of the projection direction (negative x direction) from the projection unit 3, and the battery 7 is arranged below the control board 6 in the vertical direction. That is, like the control board 6, the battery 7 is also arranged on the opposite side of the projection direction (negative x direction side) with respect to the projection unit 3.

[0043] By positioning the projection unit 3, control board 6, and battery 7 in this way, two of the optical unit (projection unit 3), control board 6 (control unit), and battery 7 are arranged side by side horizontally (x direction), and the remaining one is arranged overlapping the two horizontal ones in the vertical direction (z direction). With this configuration, the image projection device 1 can be made compact and easy to hold.

[0044] Furthermore, a partition member 8 is disposed inside the main body 2. The partition member 8 separates at least the battery 7 from the projection unit 3 and the control board 6. In particular, in this embodiment, as shown in FIG. 10 , the partition member 8 is a plate-shaped member, and is disposed so that a first surface 85 of a pair of main surfaces faces the negative z direction, and a second surface 86 faces the negative z direction. The battery 7 is disposed on the first surface 85 side of the partition member 8, and the control board 6 and the projection unit 3 are disposed on the second surface 86 side opposite the first surface 85.

[0045] In this way, by separating the internal space of the main body 2 so that only the battery 7 is housed in a separate room using the partition member 8, the LEDs of the optical unit of the projection unit 3, the semiconductors of the control board 6, etc. can be kept away from the heat emitted by the battery 7 and are therefore insulated from the heat.

[0046] As shown in FIG. 10, the upper surface of the main body 2 is preferably a curved surface that curves toward the bottom surface B along the projection direction (x direction). The shape of this curved surface can also be expressed as "in a cross-sectional shape viewed from the y direction, it curves so as to approach the bottom surface B from the x-axis direction" or "in a cross-sectional shape viewed from the y direction, the center of curvature is located in the direction of the bottom surface B rather than the position of the upper surface." Furthermore, the upper surface of the convex portion 2D is also a curved surface similar to the upper surface of the main body 2, and it is preferable that the curved surface of the upper surface of the main body 2 and the curved surface of the upper surface of the convex portion 2D are continuously connected. "Continuously connected" can also be said to mean that the curvatures of both curved surfaces at the connected point are approximately the same. These configurations also make it easier to grip. In other words, the upper surface of the main body 2 is curved so as to protrude toward the opposite side of the bottom surface B (positive z direction), and the upper surface of the convex portion 2D is also curved so as to protrude toward the opposite side of the bottom surface B. The surface where the upper surface of the main body 2 and the upper surface of the protrusion 2D are continuous is curved so as to protrude to the side opposite to the bottom surface B side.

[0047] 10, the main body 2 is provided with a tripod female screw portion 17 that opens onto the bottom surface on the negative z side for attaching a tripod to the main body 2. The tripod female screw portion 17 (tapped hole) is disposed between the battery 7 and the projection unit 3 (or the control board 6). This provides the main body 2 with a tripod screw fixing function, and also allows for space saving without increasing the size of the main body 2.

[0048] Further, referring to Figure 10, the female screw portion 17 for the tripod screw is arranged in an area that overlaps with the gap f in the x direction between the battery 7 and the projection unit 3 or control board 6 (projection unit 3 in the example of Figure 10) that is arranged in parallel with the battery 7 along the projection direction, when viewed from the top and bottom (z direction).

[0049] 10, the gap f (circled space) between the battery 7 and the projection unit 3 arranged in parallel along the projection direction (x direction) and the portion of the tripod screw female thread portion 17 on the negative x side of the axis L2 are arranged to overlap when viewed from the vertical direction (z direction). As another example, if the gap f is equal to or greater than the diameter of the tripod screw female thread portion 17, the entire tripod screw female thread portion 17 can be arranged in a region that overlaps with this gap f when viewed from the vertical direction (z direction).

[0050] 10, the projection unit 3 is arranged so that at least a portion of the projection unit 3 overlaps the axial direction L2 of the female threaded portion 17 for the tripod screw. The angle α formed by the axial direction L2 of the female threaded portion 17 for the tripod screw and the optical axis direction L1 of the projection unit 3 is an acute angle. By arranging the female threaded portion 17 for the tripod screw so that it overlaps with a portion of the projection unit 3, the extension of the main body dimension in the projection direction (x direction) can be further suppressed even when the female threaded portion 17 for the tripod screw is provided, thereby enabling space savings.

[0051] FIG. 11 is an enlarged cross-sectional view of the vicinity of the tripod mounting hole (tripod screw female thread portion 17). As shown in FIG. 11, a step g is provided between the start position of the tripod screw female thread portion 17 and the outer surface of the main body 2. In other words, the insertion surface of the tripod screw female thread portion 17 is positioned at a recessed position toward the inside of the main body (positive z direction) with respect to the outer surface of the main body 2, and the mounting portion on the outer surface of the main body 2 comes into surface contact with the tripod side. By recessing the tripod mounting hole by one step in this way, when attaching the tripod holder (male thread side), the tripod holder can be received in a balanced manner on the flat surface of the main body exterior surface (bottom surface) without first hitting the tripod mounting hole.

[0052] FIG. 12 is a longitudinal cross-sectional view showing a modified example of the tripod mounting hole. As shown in FIG. 12, a configuration may be adopted in which a portion h of the female tripod screw portion 17 is disposed so as to extend into the area of ​​the main body 2 that is partitioned by a partition member 8 and that houses the battery 7. As an example of such a configuration, the female tripod screw portion 17 is disposed so that the angle α formed between the axial direction L2 of the female tripod screw portion 17 and the optical axis direction L1 of the projection unit 3 is a right angle. In this manner, by disposing the portion h of the female tripod screw portion 17 so that it overlaps with the chamber of the battery 7, space can be saved in the longitudinal direction (x direction) of the main body 2. Furthermore, with a configuration in which the axial direction L2 of the female tripod screw portion 17 and the optical axis direction L1 of the projection unit 3 are perpendicular as shown in FIG. 12, even when the main body 2 is mounted on a tripod, the main body 2 can be supported at the same angle as when projecting with one hand. This allows projection similar to that achieved with one-handed operation even when using a tripod. This makes it easier to use a tripod and allows for longer projection times than when the user holds the device, making the image projection device 1 easier to use.

[0053] 12, the female threaded portion 17 for the tripod screw may be configured to penetrate through a part of the projection unit 3 (in other words, to be recessed into the interior of the projection unit 3). This allows for suppressing the extension of the main body dimension in the vertical direction, even if the tip of the female threaded portion 17 for the tripod screw on the positive z direction side is configured to overlap with the projection unit 3, thereby enabling space saving.

[0054] As shown in FIGS. 1, 6, 7, etc., the main body 2 is provided with a dial 15 for adjusting the focus of the image projected by the projection unit 3. The dial 15 is disposed on a protrusion 2F that protrudes in the negative y direction from a side surface 2H of a protrusion 2D of the main body 2 on the negative y direction side. As shown by the hatched area in FIGS. 2 and 7, a finger hook 2I for holding the main body 2 with one hand is disposed on the protrusion 2D. The finger hook 2I is disposed on a surface 2E of the protrusion 2D on the negative z direction side, extending in the y direction with a predetermined width in the x direction. For example, as shown in FIGS. 6 and 7, when the main body 2 is held with one hand H, the middle finger is positioned along the finger hook 2I. As shown in FIG. 7, the dial 15 and the finger hook 2I are disposed so that at least a portion of them overlap when viewed from the vertical direction (z direction). The operation direction of the dial 15 is the vertical direction. By arranging the dial 15 in this manner, the dial 15 is positioned at a position that is easy to operate with the tip of the middle finger placed on the finger loop 2I when holding the device with one hand, and the dial 15 is arranged so that it can be rotated in a direction that makes it easy to operate, as shown in Fig. 6. This makes it possible to operate the dial 15 with the tip of the middle finger while holding the device with one hand, making it possible to hold the main body 2 and operate the dial 15 at the same time.

[0055] 4, the main body 2 has a first side surface (i.e., an end surface 2G of the protrusion 2F) on which the dial 15 is provided, and a second side surface (i.e., a side surface 2H on the y-negative side of the protrusion 2D of the main body 2) that is disposed below the first side surface 2G and recessed relative to the first side surface 2G. In other words, the main body 2 has a first side surface 2G in the short direction in the lateral direction of the main body 2 on which the dial 15 is disposed, and a different second side surface 2H that forms a step below the first side surface 2G. The lower end of the first side surface 2G is disposed below the optical axis center L1, and the distance d2 from the optical axis center L1 to the second side surface 2H is shorter than the distance d1 to the first side surface 2G. With this configuration, the surface 2H below the dial 15 is recessed by one step, making it easier to touch and adjust the dial 15.

[0056] Fig. 13 is a perspective cross-sectional view of the vicinity of the projection button 4. As shown in Fig. 13, the projection button 4, which is used to input an operation to switch the projection unit 3 between a projection state and a non-projection state, is provided on the surface of the main body 2. This projection button 4 is a movable member that moves downward when pressed. When moved downward, a protrusion provided on the underside of the button presses a switch provided on the control board 6, allowing the control board 6 to detect that the projection button 4 has been pressed.

[0057] As shown in Figure 13, the outer edge 4A of the projection button 4 protrudes outward (upward, in the positive z direction in Figure 13) from the surface of the main body 2. Because the projection button 4 is convex from the exterior surface (upper cover 21), the projection button 4 is easy to press. Note that the entire outer edge 4A does not need to protrude upward from the surface of the main body 2; at least a portion of it may protrude.

[0058] 13, the center 4B of the projection button 4 is recessed from the surface of the main body 2. In other words, the upper surface of the pressing portion of the projection button 4 becomes more concave from the periphery toward the center. In this way, the center of the projection button 4 is concave, making it easy to press as your thumb fits comfortably. The projection button 4 is the button that is pressed most frequently on the image projection device 1, so it is differentiated from the other buttons.

[0059] FIG. 14 is a side cross-sectional view of the vicinity of power button 11. As shown in FIG. 14, power button 11, which is used to input an operation to switch the power supply on and off, is provided on the surface of main body 2. This power button 11 is a movable member that moves downward when pressed. When moved downward, a protrusion provided on the underside of the button presses a switch provided on switch board 23, allowing switch board 23 to detect that power button 11 has been pressed.

[0060] 14, power button 11 is held by an annular support member 19 formed along its outer edge, and an outer end face 19A (on the z-positive side) of support member 19 is formed in an inclined shape that is recessed toward the center of the annular shape toward the inside of main body 2. As a result, power button 11 is held by inclined support member 19, and only the button moves, allowing the power switch on switch board 23 to be pressed.

[0061] Furthermore, the power button 11 is recessed toward the interior of the main body 2 (negative z direction) relative to the surface of the main body 2. Because the power button 11 is recessed further than the projection button 4 and the support member 19 has a sloped shape, the height and shape of the button are differentiated from the projection button 4, preventing accidental button presses. Furthermore, the outer edge of the support member 19 may be configured so that all or part of it protrudes outward (upward) from the surface of the main body 2.

[0062] FIG. 15 is a perspective view of the integrally molded part 20 of the power button 11 and the button group 12. As shown in FIGS. 1 and 14, the button group 12 is provided on the surface of the main body 2. Each button of the button group 12 is also a movable member that moves downward when pressed. When moved downward, a protrusion provided on the underside of the button presses a switch provided on the switch board 23, allowing the switch board 23 to detect that any button in the button group 12 has been pressed.

[0063] 15, the button group 12 and the power button 11 are integrally formed as a single integrally molded part 20. The integrally molded part 20 has parts corresponding to the power button 11 and the button group 12, and a connecting part 20A connecting these parts. By fixing the connecting part 20A to the upper cover 21, the power button 11 and the button group 12 can be moved independently.

[0064] The entire integrally molded part 20 is formed, for example, from an elastic material. Alternatively, the connecting part 20A and the button part may be molded from different materials, such as by molding the connecting part from resin and the button part from an elastic material such as rubber. In short, any material may be used as long as the power button 11 and the button group 12 can be moved independently.

[0065] FIG. 16 is a diagram illustrating a method for attaching the integrally molded part 20. As shown in FIG. 16, the integrally molded part 20 is attached by being pressed against the top cover 21 of the main body 2 by a switch board 23. The switch board 23 is provided with a power switch that is pressed by the power button 11 and a group of switches that are pressed by the button group 12. The switch board 23 is attached to the top cover 21 of the main body 2 by pressing the integrally molded part 20 from the inside of the top cover 21 of the main body 2. Also, as shown in FIG. 16, a support member 19 is disposed between the integrally molded part 20 and the top cover 21, and the portion of the integrally molded part 20 corresponding to the power button 11 is fitted into a central hole in the support member 19. In this way, the power button 11, the button group 12, and the switch board 23 are attached to the top cover 21 as a unit, and can be removed as a unit, thereby improving maintainability.

[0066] As shown in FIG. 5 , the projection unit 3, control board 6, and battery 7 are fixed to a partition member 8 and attached to the upper cover 21 of the main body 2 as a unit. The projection unit 3 is fixed to a projection unit installation section 81 that is located on the x-positive side and the z-positive side of the partition member 8. The control board 6 is fixed to a control board installation section 82 that is located on the x-negative side and the z-positive side of the partition member 8. The battery 7 is fixed to a battery installation section 83 that is located on the x-negative side and the z-negative side of the partition member 8. Then, the partition member 8, with the projection unit 3, control board 6, and battery 7 fixed to the projection unit installation section 81, control board installation section 82, and battery installation section 83, respectively, is connected and fixed to the upper cover 21.

[0067] With this configuration, the projection unit 3, control board 6, and battery 7 are pressed against and fixed to the partition member 8, forming an integrated unit, and are detachable in the vertical direction (z direction) from the upper cover 21 of the main body 2. Furthermore, by removing the lower cover 22 from the main body 2, the image projection device 1 can be disassembled with the projection unit 3, control board 6, and battery 7 integrally connected to the upper cover 21 via the partition member 8. Being able to remove them as an integrated unit in this way improves maintainability (ease of replacement work). For example, it becomes easier to replace the battery 7 or to perform maintenance work by temporarily removing it.

[0068] FIG. 17 is a diagram illustrating a method for installing the battery 7. FIG. 18 is a cross-sectional view showing the installed state of the battery 7. As shown in FIGS. 17 and 18, the side surfaces of the battery 7 in the width direction (y direction) perpendicular to the up-down direction (z direction) are fixed to the partition member 8 via elastic members 24A. For example, a sheet-like elastic member 24A of a predetermined thickness is disposed on the surface of the inner wall of the battery installation section 83 of the partition member 8 that comes into contact with the side wall of the battery 7 when the battery 7 is installed. The elastic member 24A is, for example, rubber.

[0069] 18, when the battery 7 is installed, the elastic member 24A is interposed in the gap between the side wall of the battery 7 and the inner wall of the battery installation section 83, and the side surface of the battery 7 presses the elastic member 24A toward the inner wall, thereby applying the biasing force of the elastic member 24A to the battery 7. This allows the battery 7 to be more firmly held by the inner wall of the battery installation section 83, so that the battery 7 can be more firmly fixed to the battery installation section 83 of the partition member 8. Furthermore, by using a configuration in which the elastic member 24A is sandwiched, the battery 7 can be easily removed from the battery installation section 83 of the partition member 8 when replacing the battery, as it is not fixed by screws or the like.

[0070] The battery 7 is installed with an elastic member 24B interposed between the upper surface or the lower surface in the vertical direction (z direction) and the opposing partition member 8 or main body 2. In the examples of FIGS. 17 and 18, the battery 7 is installed with an elastic member 24B interposed in the gap between the upper surface of the battery 7 and the battery installation section 83 of the partition member 8 opposing the upper surface. As shown in FIG. 18, the battery 7 is also installed with an elastic member 24B interposed in the gap between the lower surface of the battery 7 and the opposing inner wall of the lower cover 22 of the main body 2. By sandwiching the battery 7 between the elastic members 24B from both sides in the vertical direction in this way, it is possible to prevent the battery 7 from vibrating or moving relative to the main body 2. Note that a configuration in which the elastic member 24B is arranged on only one of the upper surface or lower surface of the battery 7 may be used.

[0071] FIG. 19 shows a modified example of the pattern on the operation surface of the dial 15. As described with reference to FIG. 7 and other figures, in this embodiment, the outer peripheral surface used for rotating the dial 15 is formed with a slit recessed toward the rotation axis L3 of the dial 15, and the shape of the slit is a line extending along the axial direction. However, the shape of the slit may be other than linear. For example, as in the operation surfaces 15A, 15B, and 15C (outer peripheral surfaces of cylindrical dials) shown in FIGS. 19(A), (B), and (C), the shape of the slit may be a diamond, ellipse, circle, or other shape other than linear. The presence of a slit in the dial 15 makes it easier for fingers to hook onto the dial, improving grip strength when turning the dial 15 and making it easier to turn.

[0072] Figure 20 is a perspective cross-sectional view showing the mounting position of the dial 15. As shown in Figure 20, the rotation axis L3 of the dial 15 is housed inside the outer surface of the main body 2 (in the example of Figure 20, on the y-positive side of the side surface 2G toward the inside of the main body 2). This configuration reduces the protrusion of the dial 15 in the outer diameter direction, making it possible to save space.

[0073] As shown in Fig. 5, the main body 2 is provided with a speaker 16 disposed inside the main body 2. The speaker 16 is fixed to the partition member 8. For example, as shown in Fig. 5, the speaker 16 is disposed along the side of the battery 7 and is fixed by pressing it against a speaker installation portion 84 adjacent to the battery installation portion 83 of the partition member 8. For example, there is a pair of speakers 16, which are disposed on a pair of opposing side surfaces of the battery 7. When installed inside the main body 2, this pair of speakers 16 are disposed so as to emit sound in a direction (both sides in the y direction) perpendicular to the optical axis direction (x direction) of the projection unit 3.

[0074] Furthermore, the speaker 16 is fixed by being pressed against the speaker installation portion 84 of the partition member 8 via the elastic body 16A. The speaker 16 is covered around its periphery with the elastic body 16A so that it is in contact with at least the speaker installation portion 84 of the partition member 8 via the elastic body 16A. The entire periphery of the speaker 16 may be covered with the elastic body 16A. This allows the elastic body 16A to absorb external vibrations, making the speaker 16 less susceptible to the effects of vibrations. Furthermore, because the speaker 16 is pressed against the partition member 8 via the elastic body 16A rather than fixed with screws, the speaker 16 can be easily attached and detached from the partition member 8.

[0075] FIG. 21 is a cross-sectional view of the vicinity of the tip 2A of the protrusion 2D of the main body 2. FIG. 22 is a diagram illustrating a method for attaching the cover member 25. As shown in FIG. 21, the projection unit 3 is disposed so as to project an image to the outside through an opening 2C provided in the lower cover 22 of the main body 2. A cover member 25 for protecting the lens unit 3A of the projection unit 3 is provided in the opening 2C. As shown in FIG. 22, the cover member 25 is inserted between a pair of vertical walls 26 erected on the inner wall of the lower cover 22 across the opening 2C. The cover member 25 is fixed by being pressed into a gap between the inner wall of the lower cover 22 and a support portion 27 formed at the bottom of the pair of vertical walls 26, extending from the end faces on the negative x-direction side toward the central opening 2C along the y-direction. As a result, as shown in FIG. 21, the cover member 25 is disposed at a position farther away from the lens unit 3A in the projection direction (positive x-direction). This configuration prevents scratches and dirt from being applied to the lens unit 3A of the projection unit 3. By closing the opening 2C through which the projection unit 3 projects an image with the cover member 25, it is possible to prevent the user's finger or a thin rod-like object from being inserted from outside, and it becomes impossible to directly touch the lens unit 3A of the projection unit 3 from outside.

[0076] Furthermore, cover member 25 is transparent or translucent and transmits light projected from projection unit 3. This allows light projected from lens unit 3A of projection unit 3 to be projected without being blocked by cover member 25. Examples of materials that can be used for cover member 25 include resins such as acrylic, polycarbonate, and polystyrene, and glass.

[0077] As shown in Fig. 20 and other figures, the main body 2 is formed by mating an upper cover 21 disposed on the upper side in the up-down direction with a lower cover 22 disposed on the lower side. At a mating portion 28 between the upper cover 21 and the lower cover 22, an upper convex portion 29 extending along the upper mating surface of the upper cover 21 and protruding from the upper mating surface, and a lower convex portion 30 extending along the lower mating surface of the lower cover 22 and protruding from the lower mating surface, overlap in the extension direction of the upper and lower mating surfaces (i.e., the x direction or the y direction). In the example of Fig. 20, the upper convex portion 29 protrudes from the upper mating surface in the negative z direction, and the lower convex portion 30 protrudes from the lower mating surface in the positive z direction, and are arranged to overlap when viewed from the y direction (the direction connecting the inside and outside of the side surface of the main body 2). This configuration allows the upper cover 21 and the lower cover 22 to be securely fitted together, which effectively prevents the upper cover 21 and the lower cover 22 from shifting in the x-direction or y-direction when the main body 2 is held and operated, allowing for more stable operation.

[0078] As described with reference to FIG. 14 and other figures, power button 11 is held by an annular support member 19 formed along its outer edge. This support member 19 may be made of a light-guiding material, and a light source for illuminating support member 19 may be disposed inside main body 2. This allows the user to more clearly locate the position of power button 11. As described above, as shown in FIG. 20, the upper convex portion 29 and the lower convex portion 30 are configured to overlap with mating portion 28 of upper cover 21 and lower cover 22, preventing light leakage from gaps in mating portion 28.

[0079] 23 to 28, modified examples of the internal arrangement of the main body 2 of the image projection device 1 will be described. FIG. 23 is a vertical cross-sectional view showing a first modified example of the internal arrangement. In the first modified example shown in FIG. 23, a partition member 8A separates the battery 7, the projection unit 3, and the control board 6 from each other inside the main body 2. In the configuration of the embodiment shown in FIG. 10 and other figures, the battery 7 can be a heat source, so a configuration is shown in which only the battery 7 is separated from the other elements in a separate compartment. However, the projection unit 3 and the control board 6 can also be separate heat sources. Therefore, by separating the internal space so that the battery 7, the projection unit 3, and the control board 6 are placed in separate compartments inside the main body 2 as shown in FIG. 23, the impact of heat generated by one element on the other elements can be further reduced.

[0080] Furthermore, any two of the projection unit 3, control board 6, and battery 7 may be configured in parallel in the direction of the optical axis of the light from the projection unit 3, and any two may be configured to be aligned along the vertical direction of the projected image of the projection unit 3. Therefore, an arrangement other than the arrangement shown in Fig. 10 etc., in which only the projection unit 3 is in the front (x-positive direction side), the control board 6 is in the upper rear (x-negative direction side), and the battery 7 is in the lower rear may also be used. Specific examples of such arrangements are shown below.

[0081] Fig. 24 is a vertical cross-sectional view showing a second modified example of the internal arrangement. In the second modified example shown in Fig. 24, the partition member 8B houses only the projection unit 3 in the protrusion 2D at the front of the main body 2, the battery 7 is located above and behind the main body 2 relative to the projection unit 3, and the control board 6 is located below the battery 7.

[0082] Fig. 25 is a vertical cross-sectional view showing a third modified internal arrangement. In the third modified example shown in Fig. 25, partition member 8C accommodates projection unit 3 and control board 6 in protrusion 2D at the front of main body 2, with control board 6 located above projection unit 3 and battery 7 located behind main body 2 with respect to projection unit 3.

[0083] Fig. 26 is a vertical cross-sectional view showing a fourth modified example of the internal arrangement. In the fourth modified example shown in Fig. 26, the partition member 8D accommodates the projection unit 3 and the control board 6 in the protrusion 2D at the front of the main body 2, with the control board 6 located below the projection unit 3 and the battery 7 located behind the main body 2 with respect to the projection unit 3.

[0084] Fig. 27 is a vertical cross-sectional view showing a fifth modified example of the internal arrangement. In the fifth modified example shown in Fig. 27, the partition member 8E accommodates the projection unit 3 and the battery 7 in the protrusion 2D at the front of the main body 2, with the battery 7 located below the projection unit 3 and the control board 6 located behind the main body 2 with respect to the projection unit 3.

[0085] Fig. 28 is a vertical cross-sectional view showing a sixth modified example of the internal arrangement. In the sixth modified example shown in Fig. 28, the partition member 8F accommodates the projection unit 3 and the battery 7 in the protrusion 2D at the front of the main body 2, with the battery 7 located above the projection unit 3 and the control board 6 located behind the main body 2 with respect to the projection unit 3.

[0086] The present embodiment has been described above with reference to specific examples. However, the present disclosure is not limited to these specific examples. Design modifications to these specific examples made by a person skilled in the art as appropriate are also included within the scope of the present disclosure as long as they comprise the features of the present disclosure. The elements of each of the above-described specific examples, as well as their arrangement, conditions, shape, etc., are not limited to those exemplified and can be modified as appropriate. The elements of each of the above-described specific examples can be combined in various ways as appropriate, as long as no technical contradictions arise. [Explanation of symbols]

[0087] 1. Image projection device 2 Main unit 2D convex part 21 Upper cover 22 Lower cover 3 Projection section 4 Projection button 4A Outer edge 4B Central part 6 Control board (control unit) 7 Battery 8, 8A to 8F Partition material 11 Power button 12 Buttons 15 Dial 16 speakers 16A Elastic body 17 Tripod screw female thread 19 Support member 20 Integral molded parts 23 Switch board 24A, 24B Elastic member 25 Cover member L light L1 optical axis L2 Tripod mounting hole axis L3 Dial axis d1 Distance between the protrusion and the optical axis d2 Distance between the side of the main body and the optical axis [Prior art documents] [Patent documents]

[0088] [Patent Document 1] Patent No. 4994744

Claims

1. a projection unit that projects an image by irradiating light; a control unit that controls the operation of the projection unit; a battery that supplies power to the projection unit and the control unit; a main body in which the projection unit, the control unit, and the battery are disposed; In an image projection device having the main body has a protrusion protruding in the optical axis direction of the light, At least a part of the projection portion is disposed on the convex portion, any two of the projection unit, the control unit, and the battery are arranged in the main body in parallel with each other in the direction of the optical axis of the light, any two of the projection unit, the control unit, and the battery are arranged vertically side by side in the main body, a dial for adjusting the focus of the image projected by the projection unit; The dial is disposed on a side surface of the protrusion, a finger hook for holding the main body with one hand is disposed on the protrusion; the dial and the finger hook are arranged so as to at least partially overlap each other when viewed from the up-down direction, The operation direction of the dial is the up and down direction. Image projection device.

2. a projection unit that projects an image by irradiating light; a control unit that controls the operation of the projection unit; a battery that supplies power to the projection unit and the control unit; a main body in which the projection unit, the control unit, and the battery are disposed; In an image projection device having the main body has a protrusion protruding in the optical axis direction of the light, At least a part of the projection portion is disposed on the convex portion, any two of the projection unit, the control unit, and the battery are arranged in the main body in parallel with each other in the direction of the optical axis of the light, any two of the projection unit, the control unit, and the battery are arranged vertically side by side in the main body, a projection button for inputting an operation to switch between a projection state and a non-projection state of the projection unit is provided on the surface of the main body; The outer edge of the projection button protrudes from the surface. Image projection device.

3. a projection unit that projects an image by irradiating light; a control unit that controls the operation of the projection unit; a battery that supplies power to the projection unit and the control unit; a main body in which the projection unit, the control unit, and the battery are disposed; In an image projection device having the main body has a protrusion protruding in the optical axis direction of the light, At least a part of the projection portion is disposed on the convex portion, any two of the projection unit, the control unit, and the battery are arranged in the main body in parallel with each other in the direction of the optical axis of the light, any two of the projection unit, the control unit, and the battery are arranged vertically side by side in the main body, a power button for inputting an operation to switch power supply on or off is provided on the surface of the main body; The power button is held by an annular support member formed along its outer edge, and the outer end face of the support member is formed in an inclined shape that is recessed toward the center of the annulus so as to be recessed toward the inside of the main body. Image projection device.

4. a projection unit that projects an image by irradiating light; a control unit that controls the operation of the projection unit; a battery that supplies power to the projection unit and the control unit; a main body in which the projection unit, the control unit, and the battery are disposed; In an image projection device having the main body has a protrusion protruding in the optical axis direction of the light, At least a part of the projection portion is disposed on the convex portion, any two of the projection unit, the control unit, and the battery are arranged in the main body in parallel with each other in the direction of the optical axis of the light, any two of the projection unit, the control unit, and the battery are arranged vertically side by side in the main body, the main body has a dial for adjusting the focus of the image projected by the projection unit, A slit recessed toward the rotation axis of the dial is formed on the outer peripheral surface used for rotating the dial, The shape of the slit includes diamond, circle, ellipse, and line. Image projection device.

5. a projection unit that projects an image by irradiating light; a control unit that controls the operation of the projection unit; a battery that supplies power to the projection unit and the control unit; a main body in which the projection unit, the control unit, and the battery are disposed; In an image projection device having the main body has a protrusion protruding in the optical axis direction of the light, At least a part of the projection portion is disposed on the convex portion, any two of the projection unit, the control unit, and the battery are arranged in the main body in parallel with each other in the direction of the optical axis of the light, any two of the projection unit, the control unit, and the battery are arranged vertically side by side in the main body, the main body has a dial for adjusting the focus of the image projected by the projection unit, The rotation axis of the dial is housed inside the outer surface of the main body. Image projection device.

6. a projection unit that projects an image by irradiating light; a control unit that controls the operation of the projection unit; a battery that supplies power to the projection unit and the control unit; a main body in which the projection unit, the control unit, and the battery are disposed; In an image projection device having the main body has a protrusion protruding in the optical axis direction of the light, At least a part of the projection portion is disposed on the convex portion, any two of the projection unit, the control unit, and the battery are arranged in the main body in parallel with each other in the direction of the optical axis of the light, any two of the projection unit, the control unit, and the battery are arranged vertically side by side in the main body, a speaker disposed inside the main body; The speaker is fixed to the partition member. Image projection device.

7. a projection unit that projects an image by irradiating light; a control unit that controls the operation of the projection unit; a battery that supplies power to the projection unit and the control unit; a main body in which the projection unit, the control unit, and the battery are disposed; In an image projection device having the main body has a protrusion protruding in the optical axis direction of the light, At least a part of the projection portion is disposed on the convex portion, any two of the projection unit, the control unit, and the battery are arranged in the main body in parallel with each other in the direction of the optical axis of the light, any two of the projection unit, the control unit, and the battery are arranged vertically side by side in the main body, The main body is formed by joining an upper cover disposed on the upper side in the vertical direction and a lower cover disposed on the lower side, At the mating portion between the upper cover and the lower cover, an upper convex portion extending along the upper mating surface of the upper cover and protruding from the upper mating surface, and a lower convex portion extending along the lower mating surface of the lower cover and protruding from the lower mating surface, are superimposed along the extending direction of the upper mating surface and the lower mating surface. Image projection device.

8. a projection unit that projects an image by irradiating light; a control unit that controls the operation of the projection unit; a battery that supplies power to the projection unit and the control unit; a main body in which the projection unit, the control unit, and the battery are disposed; In an image projection device having the main body has a protrusion protruding in the optical axis direction of the light, At least a part of the projection portion is disposed on the convex portion, any two of the projection unit, the control unit, and the battery are arranged in the main body in parallel with each other in the direction of the optical axis of the light, any two of the projection unit, the control unit, and the battery are arranged vertically side by side in the main body, The main body is formed by joining an upper cover disposed on the upper side in the vertical direction and a lower cover disposed on the lower side, the projection unit is disposed to project an image to the outside through an opening provided in the lower cover, a cover member for protecting a lens of the projection unit is pressed against the lower cover and fixed to the opening; the cover member is disposed at a position farther away from the lens in the projection direction of the projection unit. Image projection device.

9. a partition member disposed inside the main body; The partition member separates at least the battery from the projection unit and the control unit. The image projection device according to any one of claims 1 to 8.

10. the control unit is disposed on an opposite side of the projection unit in a projection direction, The battery is disposed below the control unit in the up-down direction. The image projection device according to claim 9 .

11. the battery is disposed on a first surface side of the partition member, and the control unit and the projection unit are disposed on a second surface side opposite to the first surface. The image projection device according to claim 10.

12. The partition member individually divides the battery, the projection unit, and the control unit inside the main body. The image projection device according to any one of claims 9 to 11.

13. The main body has a female thread portion for a tripod screw, The female screw portion for the tripod screw is arranged in an area that overlaps a gap between the battery and the projection unit or the control unit that is arranged in parallel with the battery along the direction of the optical axis of the light when viewed from the up-down direction. The image projection device according to any one of claims 1 to 12.

14. The main body has a female thread portion for a tripod screw, The female thread portion for the tripod screw is disposed between the battery and the projection unit or the control unit, which is disposed in parallel with the battery along the direction of the optical axis of the light. The image projection device according to any one of claims 1 to 12.

15. The main body has a first side surface on which the dial is provided, and a second side surface that is disposed below the first side surface and is recessed relative to the first side surface. The image projection device according to claim 1 .

16. the projection unit is disposed so that at least a portion of the projection unit overlaps with the axial direction of the female threaded portion for tripod screw, and an acute angle is formed between the axial direction of the female threaded portion for tripod screw and the optical axis direction of the projection unit.

15. The image projection device according to claim 13 or 14.

17. a part of the female threaded portion for tripod screw is disposed in a region in the main body that is partitioned by a partition member and in which the battery is accommodated; The image projection device according to claim 16.

18. The angle formed by the axial direction of the female threaded portion for the tripod screw and the optical axis direction of the projection unit is a right angle.

15. The image projection device according to claim 13 or 14.

19. A step is provided between the start point of the female threaded portion for the tripod screw and the outer surface of the main body. The image projection device according to any one of claims 13, 14, and 16 to 18.

20. The center of the projection button is recessed from the surface. The image projection device according to claim 2 .

21. The power button is recessed relative to the surface of the main body. The image projection device according to claim 3 .

22. a group of buttons is provided on the surface of the main body, and the group of buttons and the power button are a single, integrally molded part; 22. The image projection device according to claim 3 or 21.

23. a switch board on which a power switch to be pressed by the power button and a group of switches to be pressed by the group of buttons are provided; The switch board is attached to the main body by pressing the integrally molded parts from the inside of the main body.

23. The image projection device according to claim 22.

24. The main body is formed by joining an upper cover disposed on the upper side in the vertical direction and a lower cover disposed on the lower side, a partition member disposed inside the main body; the projection unit, the control unit, and the battery are fixed to the partition member and attached to the upper cover; The image projection device according to any one of claims 1 to 23.

25. a partition member disposed inside the main body; The battery has a widthwise side surface perpendicular to the up-down direction, the widthwise side surface being fixed to the partition member via an elastic member. The image projection device according to any one of claims 1 to 24.

26. The battery is installed with an elastic member interposed between an upper surface on the upper side or a lower surface on the lower side in the vertical direction and the partition plate or the main body facing the upper surface or the lower surface.

26. The image projection device according to claim 25.

27. The speaker is surrounded by an elastic body and is fixed to the partition member by being pressed against the elastic body. The image projection device according to claim 6 .

28. a power button for inputting an operation to switch power supply on or off is provided on the surface of the main body; The power button is held by an annular support member formed along its outer edge, The support member is made of a light-guiding material, and a light source for illuminating the support member is disposed inside the body. The image projection device according to claim 7 .

29. the cover member is transparent or translucent and transmits light projected from the projection unit; The image projection device according to claim 8 .

Images