Projection system

Abstract

The utility model provides a projection system, which is used for improving the operability when a projector is rotated in a structure for supporting the projector to be rotatable. The projection system includes: a projector; a holder that supports the projector; a hinge unit that connects the projector and the holder; and a wiring connected to a circuit board of the projector, the projector having a projection lens and being rotatable relative to the holder about a rotation axis intersecting the optical axis, the holder including: a holder frame connected to the hinge unit; and a stand base supporting the weight of the projector and the stand frame, the stand base having a connection terminal connected to the outside, the wiring reaching the stand base via the projector, the hinge unit, and the stand frame, the hinge unit suppressing relative rotation of the projector with respect to the stand.

Description

TECHNICAL FIELD

[0001] The utility model relates to a projection system. BACKGROUND

[0002] In the past, in a projector that projects an image, a projector having a projector support table that rotatably supports the projector is known (for example, refer to Patent Document 1). In this projector, a user can arbitrarily adjust the direction of image light projected by the projector.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2016-027369

[0004] Generally, in a projector, an operation button that is operated by a user, and a connection terminal that connects a cable for supplying an image to the projector are provided. However, in a structure in which the connection terminal is provided to the main body of the projector, or a structure in which a wiring cable is provided so as to extend from the inside of the projector to the outside, the cable connected to the connection terminal easily becomes an obstacle when the projector is rotated. Therefore, the user needs to rotate the projector while paying attention to the cable. SUMMARY

[0005] A projector of one embodiment of the present disclosure includes a projector, a support for supporting the projector, a hinge unit connected to the projector and to the support, connecting the projector and the support, and a wiring electrically connected to a circuit board of the projector, the projector including a projection lens, the projector being capable of relatively rotating with respect to the support about a rotation axis that intersects the optical axis, the support including a support frame connected to the hinge unit and a support base connected to the support frame, the support base supporting the weight of the projector and the support frame in a set state of the projection system, the support base including a connection terminal capable of transmitting to or electrically connected to the outside, the wiring reaching the inside of the support base from the inside of the projector via the inside of the hinge unit and the inside of the support frame, and electrically connected to the connection terminal, the hinge unit suppressing relative rotation of the projector with respect to the support. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 is a perspective view of the projection system of Embodiment 1.

[0007] Figure 2 is a side view of the projection system.

[0008] Figure 3 is a perspective view of the projection system.

[0009] Figure 4 is an exploded perspective view of the support base.

[0010] Figure 5 is a V-V sectional view of Figure 3

[0011] Figure 6 is an exploded perspective view of the stent frame.

[0012] Figure 7 is a perspective view of the hinge unit.

[0013] Figure 8 is an exploded perspective view of the hinge unit.

[0014] Figure 9 is a IX-IX sectional view of Figure 1

[0015] Figure 10 is a perspective view of the hinge unit in embodiment 2.

[0016] Figure 11 is an exploded perspective view of the hinge unit of embodiment 2.

[0017] Figure 12 is a perspective view of the hinge unit of embodiment 3.

[0018] Figure 13 is an exploded perspective view of the hinge unit of embodiment 3.

[0019] Reference Signs List

[0020] ​​1: projection system; 10: projector; 10L: left side portion; 10R: right side portion; 10a: engagement hole; 11: projection lens; 12: circuit substrate; 20: support; 21: power supply wiring; 22: first wiring; 22a: protection member; 23: second wiring; 24: wiring; 30: support base; 31: support cover; 31A: upper plate portion; 31B: side plate portion; 31c: engagement hole; 32: guide member; 33: connection member; 34: first rotation restriction portion; 36: rotation stage; 36a: guide groove; 37: rubber foot; 38: fixing hole; 38A: hooking portion; 40: fixing member; 40a: round hole; 40b: engagement hole; 50: support frame; 50L: first arm; 50R: second arm; 51: frame base; 51a: opening; 52: frame cover; 54: hinge cover; 100: hinge unit; 101: shaft; 102: protruding portion; 102a, 102b: abutting portion; 103: sliding member; 104: urging member; 105: second bracket; 106: position restriction portion; 106a, 106b: abutting portion; 110: first bracket; 111: position restriction portion; 200: hinge unit; 201: shaft; 201a: bearing portion; 203: sliding member; 204: urging member; 205: second bracket; 206: protruding portion; 206a, 206b: abutting portion; 208: positioning member; 210: first bracket; 211: position restriction portion; 211a, 211b: abutting portion; 300: hinge unit; 301: shaft; 304: urging member; 305: second bracket; 306: protruding portion; 306a, 306b: abutting portion; 310: first bracket; 311: position restriction portion; 311a, 311b: abutting portion; 315: first bracket; M: arrangement surface; OA: optical axis. DETAILED DESCRIPTION

[0021] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each drawing, the direction in the arrangement state of the projection system 1 is indicated by an arrow. The symbol UP indicates the upper side, the symbol FR indicates the front side, and the symbol R indicates the right side. Although not illustrated, the opposite direction of the symbol UP indicates the lower side, the opposite direction of the symbol FR indicates the rear side, and the opposite direction of the symbol R indicates the left side. In the description, if not particularly noted, the description of the direction such as the front, the rear, the left, the right, and the upper and lower sides is made with the projection system 1 of Figure 1 as a reference.

[0022] [1. Embodiment 1]

[0023] [1-120. Structure]

[0024] [1-1-1. Configuration of projection system]

[0025] Figure 1is a perspective view of the projection system 1 to which Embodiment 1 of the present disclosure is applied, and is a view of the entire projection system 1 as viewed from the front left upper side. Figure 2 is a side view of the projection system 1. Figure 3 is a perspective view of the projection system 1, and is a view of the projection system 1 as viewed from the rear right lower side.

[0026] The projection system 1 is provided with a projector 10 that projects an image, and a stand 20 that supports the projector 10.

[0027] The projector 10 has a substantially rectangular parallelepiped-shaped casing. A projection lens 11 that projects an image light is provided on the front surface of the projector 10. Figure 1 The optical axis OA of the image light projected by the projection lens 11 onto a projection surface is shown. The optical axis OA is a central axis of the projected image, and is, for example, an imaginary axis that passes through the optical center of the projection lens 11. In the present embodiment, the optical axis OA is horizontal with respect to the projection surface M. Figure 1 In the present embodiment, the image of the projector 10 is projected toward the front, and the optical axis OA is horizontal with respect to the projection surface M. Engagement holes 10a for connecting the stand 20 are provided on the right side surface portion 10R and the left side surface portion 10L of the projector 10. The right side surface portion 10R corresponds to an example of the first side surface. The left side surface portion 10L corresponds to an example of the second side surface.

[0028] The stand 20 is provided with a substantially disc-shaped stand base 30, and a stand frame 50 that extends rearward and upward from the side portion of the stand base 30. The end portion of the stand frame 50 is connected to the engagement holes 10a provided on the left and right side surfaces of the projector 10. Thus, the stand 20 supports the projector 10 from the left and right. The projector 10 is held by the stand 20 in a state of floating from the projection surface M.

[0029] [1-1-2. Structure of stand base]

[0030] Figure 4 is an exploded perspective view of the stand base 30. Figure 5 is a V-V sectional view of Figure 3 .

[0031] The stand base 30 is composed of a stand cover 31, a rotary stage 36, and a fixing member 40.

[0032] In the present embodiment, the stand cover 31 is composed of an upper plate portion 31A and a side plate portion 31B. The overall shape of the stand cover 31 is disc-shaped. The stand cover 31 has a thickness that can accommodate the connection member 33 and the like described later.

[0033] A guide member 32 and a connection member 33 are arranged inside the stand cover 31.

[0034] A connection terminal is held in the connection member 33, and can be connected to the power supply wiring 21 located outside the stand cover 31 from the side plate portion 31B.

[0035] Further, a first rotation restricting portion 34 is provided inside the stand cover 31.

[0036] The upper plate portion 31A constitutes an upper surface of the stand base 30. As shown in Figure 2 the drawing, the upper surface of the stand base 30 is an inclined surface which is inclined from the front portion of the projection system 1 to the rear end in such a manner that the height from the setting surface of the projection system 1 becomes lower.

[0037] As shown in Figure 4 the drawing, a plurality of engagement holes 31c are provided in the central portion of the upper plate portion 31A. In the engagement holes 31c, wood screws, taps can be screwed in.

[0038] A notch 31d is provided in the side plate portion 31B. The stand frame 50 is inserted in the notch 31d, and the stand base 30 and the stand frame 50 are fixed by engagement members such as screws, bolts.

[0039] The rotation table 36 is a circular flat member as a whole, and a fixing hole 38 is provided in the central portion of the rotation table 36. The outer diameter of the rotation table 36 is formed to be substantially the same as the inner diameter of the stand cover 31. The rotation table 36 is embedded in the inside of the stand cover 31, and is fixed to the stand cover 31, constituting a lower surface of the stand base 30.

[0040] A plurality of rubber feet 37 are provided in the lower surface of the rotation table 36, i.e., the surface facing the setting surface of the projection system 1.

[0041] The fixing hole 38 is a hole whose diameter differs in the thickness direction of the rotation table 36, and the diameter of the upper portion is smaller than that of the lower portion. That is, the fixing hole 38 is formed in such a shape that the hooking portion 38A protrudes toward the center of the fixing hole 38.

[0042] A guide groove 36a is provided in the upper surface of the rotation table 36. By engaging the guide groove 36a with the guide member 32 of the stand cover 31, the stand base 30 has a rotation structure in which the stand cover 31 is rotated in the state that the rotation table 36 is fixed.

[0043] A second rotation restricting portion, not shown, is provided in the upper surface of the rotation table 36.

[0044] The fixing member 40 is a flat member formed in a circular ring shape having substantially the same diameter as the fixing hole 38. The fixing member 40 is embedded in the fixing hole 38 from the lower surface side of the rotation table 36, and is fixed to the rotation table 36. The outer diameter of the fixing member 40 is such a size that the hooking portion 38A is not passed through, and thus the fixing member 40 can be fixed at the position at which the hooking portion 38A is abutted. A circular hole 40a and a plurality of engagement holes 40b are provided in the central portion of the fixing member 40.

[0045] The round hole 40a and the engagement hole 40b are provided at positions corresponding to the engagement hole 31c of the bracket cover 31. The bracket cover 31 and the fixing member 40 are engaged by inserting a screw, a bolt, or the like engagement member through the engagement hole 31c, the fixing hole 38, and the engagement hole 40b. The hooking portion 38A is supported by the fixing member 40, so that the rotary table 36 is maintained in a state of being sandwiched by the bracket cover 31 and the fixing member 40, and the bracket base 30 is configured.

[0046] [1-1-3 Structure of bracket frame]

[0047] Figure 6 is an exploded perspective view of the bracket frame 50.

[0048] As described above, the projection system 1 is provided with a pair of bracket frames 50 on the left and right. Each of the bracket frames 50 is substantially L-shaped when viewed from the front, and is a hollow body. The bracket frame 50 includes a first arm 50L and a second arm 50R. As shown in Figure 1 the first arm 50L extends to the left from the side portion of the front surface side of the bracket base 30, and then extends to the rear upper side, and is attached to the engagement hole 10a provided in the left side surface portion 10L. The second arm 50R extends to the right from the side portion of the front surface side of the bracket base 30, and then extends to the rear upper side, and is attached to the engagement hole 10a provided in the right side surface portion 10R. The bracket frame 50 is configured to be able to rotate with the projector 10.

[0049] As shown in Figure 6 the bracket frame 50 has a frame base 51 and a frame cover 52. The frame cover 52 is fixed to the frame base 51. The fixing structure of the frame base 51 and the frame cover 52 is not limited, and for example, a structure using a connecting member such as a bolt, a nut, a rivet, or a fitting structure such as a boss fitting can be used.

[0050] A rounded rectangular opening 51a is provided at the upper end of the frame base 51. The frame cover 52 is provided at a position that does not block the opening 51a when the frame base 51 is engaged. A hinge cover 54 is provided from the width direction outer side of the projection system 1 at the opening 51a, and a hinge unit 100 is disposed from the width direction inner side. The bracket frame 50 is connected to the projector 10 in a rotatable manner by the hinge unit 100. That is, the projector 10 can be rotated in the up-down direction with reference to an imaginary rotation axis formed with the hinge unit 100 provided in the left and right bracket frames 50 as a reference. In the present embodiment, the rotation axis is orthogonal to the optical axis OA of the projection lens 11. The hinge unit 100 corresponds to an example of the connecting portion.

[0051] [1-1-4. Structure of hinge unit]

[0052] Figure 7 is a perspective view of the hinge unit 100. Figure 8is an exploded perspective view of the hinge unit 100.

[0053] The hinge unit 100 has a shaft 101, a second bracket 105, and a first bracket 110. The hinge unit 100 and the opening 51a of the frame base 51, that is, the hinge unit 100 and the support frame 50 are disposed on the rotation axis of the projector 10 in the up-down direction. In addition, as shown in Figure 2 the drawing, the hinge unit 100 is disposed within a range S formed by a radius r from a center point C of the projector 10 in a side view, with the length W from the center point C to a reference point E being one-third of the radius r. The reference point E is disposed at any of the outer ends of the side surface of the projector. In the present embodiment, the reference point E is disposed in such a manner that a line connecting the center point C and the reference point E is horizontal to the placement surface M. In the present embodiment, the hinge unit 100, the center point C of the projector 10, and the rotation axis of the projector 10 in the up-down direction are formed to overlap in the side view. Thus, the rotation axis is disposed near the center of gravity of the projector 10, and the rotation of the projector 10 due to the weight is suppressed.

[0054] As shown in Figure 8 the drawing, the shaft 101 is a substantially cylindrical member, and is disposed through the second bracket 105 and the first bracket 110. The shaft 101 is a member that supports the second bracket 105 and the first bracket 110 so as to be rotatable relative to each other and serves as the axis of rotation. A protruding portion 102 extending in the radial direction is provided at the end portion of the shaft 101 on the side in the direction along the axis of rotation. As shown in Figure 7 the drawing, when the shaft 101 is viewed in plan from the direction along the axis of rotation, an abutting portion 102a and an abutting portion 102b are formed in the protruding portion 102. In the present embodiment, the abutting portion 102a corresponds to an example of the first abutting portion. The abutting portion 102b corresponds to an example of the third abutting portion.

[0055] The first bracket 110 is fixed to the shaft 101 and the projector 10. Thus, when the projector 10 and the shaft 101 rotate, the first bracket 110 also rotates in conjunction.

[0056] The second bracket 105 is fixed to the frame base 51. As shown in Figure 7 the drawing, the second bracket 105 has a protruding position restriction portion 106 on the side of the support frame 20. An abutting portion 106a that abuts against the abutting portion 102a when the projector 10 rotates and an abutting portion 106b that abuts against the abutting portion 102b are formed in the position restriction portion 106. In the present embodiment, two position restriction portions 106 are provided. The abutting portion 106a corresponds to an example of the second abutting portion. The abutting portion 106b corresponds to an example of the fourth abutting portion.

[0057] As shown in Figure 8As shown, a ring-shaped sliding member 103 and a force applying member 104 are arranged between the first bracket 110 and the second bracket 105. The shaft 101 penetrates the sliding member 103 and the force applying member 104. In the present embodiment, the sliding member 103 is provided adjacent to the second bracket 105, and the force applying member 104 is provided so as to be sandwiched by the sliding member 103 and the first bracket 110. In the present embodiment, the force applying member 104 is a spring washer.

[0058] [1-1-5. Configuration of wiring in projection system]

[0059] Figure 9 is Figure 1 is an enlarged view showing a main portion of the joint portion including the projector 10 and the stand frame 50.

[0060] The projector 10 has a circuit board 12. A first wiring 22 extending from the circuit board 12 of the projector 10 penetrates the shaft 101 of the hinge unit 100 from the joint hole 10a of the side surface of the projector 10, and is electrically connected to a second wiring 23 inside the stand frame 50. The second wiring 23 penetrates inside the stand frame 50, extends toward the stand base 30, and is electrically connected to a connection terminal held by the connection member 33. The connection terminal held by the connection member 33 is exposed to the outside from the side plate portion 31B of the stand cover 31, and thus is electrically connected to the external power supply wiring 21. Thus, the power supply to the projector 10 can be performed without exposing the wiring 24 inside the projection system 1 including the first wiring 22 and the second wiring 23, except for the external power supply wiring 21 provided to the connection terminal, to the outside.

[0061] A protection member 22a that protects the first wiring 22 is wound around the first wiring 22. The protection member 22a has a surface that slides well with respect to the first wiring 22, and is a band-shaped or tube-shaped member. By winding the protection member 22a around the first wiring 22, the friction of the first wiring 22 with other members can be reduced. Thus, the possibility of the first wiring 22 being worn due to the first wiring 22 contacting other members inside the projector 10 or the hinge unit 100 is reduced.

[0062] [1-2. Usage mode of projection system]

[0063] [1-2-1. Rotation in vertical direction of projection system]

[0064] The projector 10 of the projection system 1 can be rotated with the hinge unit 100 as the center in a state of being supported by the stand frame 50. Also, since strong friction is generated between the first bracket 110 and the second bracket 105 by the elastic force of the force applying member 104 provided to the hinge unit 100, the projector 10 is held at an arbitrary position with the hinge unit 100 as the center.

[0065] The operator can change the orientation of the projector 10 by rotating the projector 10 against the frictional force of the hinge unit 100. Here, when the operator stops applying the force when the orientation of the projector 10 becomes the angle desired by the operator, the orientation of the projector 10 is maintained by the frictional force of the hinge unit 100.

[0066] By rotating the projector 10, the direction in which the projector 10 projects an image, that is, the projection angle, can be adjusted and changed. The range in which the projector 10 can rotate about the hinge unit 100 as a center is limited, and this range can be referred to as the adjustable range of the projection angle of the projector 10.

[0067] The adjustable range of the projection angle of the projector 10 is defined by the abutting portion 102a, the abutting portion 102b of the protruding portion 102 provided to the shaft 101, and the abutting portion 106a, the abutting portion 106b of the position limiting portion 106 provided to the second bracket 105. When the projector 10 is rotated, the first bracket 110 and the shaft 101 in the hinge unit 100 are linked with the projector 10 and rotate. Also, in a state in which the abutting portion 102a of the shaft 101 and the abutting portion 106a of the second bracket 105 are in abutment, further rotation is not possible. The same is true in a state in which the abutting portion 102b and the abutting portion 106b are in abutment. That is, the projector 10 can rotate within a range in which the abutting portion 102a and the abutting portion 106a are in abutment and the abutting portion 102b and the abutting portion 106b are in abutment. Also, the projection angle of the projector 10 at either of the positions in which the abutting portion 102a and the abutting portion 106a are in abutment and the abutting portion 102b and the abutting portion 106b are in abutment can be referred to as the maximum projection angle, and the projection angle at the other position can be referred to as the minimum projection angle.

[0068] In the present embodiment, the projection angle of the projector 10 can be changed within a range of 90 degrees in the clockwise direction and 90 degrees in the counterclockwise direction with respect to an axis perpendicular to the setting surface of the stand base 30. That is, the projection angle can be adjusted within a range of 180 degrees. In other words, the angle between the optical axis OA when the abutting portion 102a and the abutting portion 106a are in abutment and the optical axis OA when the abutting portion 102b and the abutting portion 106b are in abutment is 180 degrees.

[0069] According to this structure, the projection angle of the projector 10 can be adjusted within a practically necessary and sufficient range, and by limiting the angle in which the projector 10 is rotated, the consumption of the hinge unit 100 can be suppressed. For example, in the projection system 1 of the present embodiment, the projection angle of the projector 10 is limited to a range of 180 degrees centered on the vertical direction. Therefore, contact of the front surface of the projector 10 with the stand 20 can be prevented, and the image light can be prevented from being blocked by the setting surface and the stand 20.

[0070] Further, assuming that the projector 10 is able to rotate 360 degrees with respect to the stand 20, the first wiring 22 is pulled, and the circuit board 12 can be damaged. In contrast, by adopting this structure, the angle of rotation of the projector 10 can be limited, and the possibility of damage to the circuit board 12 can be reduced.

[0071] [1-2-2.2 Rotation in the horizontal direction of the projection system]

[0072] In the projection system 1, the rotary stage 36 in contact with the setting surface is supported by the fixing member 40 so as to be rotatable. Therefore, by rotating the projection system 1 in the horizontal direction in a state in which the rotary stage 36 is in contact with the setting surface, the projection angle of the projector 10 in the horizontal direction can be adjusted. The range of rotation of the rotary stage 36 is limited by the position at which the first rotation limiting portion 34 of the stand cover 31 and the second rotation limiting portion of the rotary stage 36 abut. Therefore, the projection system 1 can be prevented from rotating without limitation, and the consumption of each portion including the rotary stage 36 can be suppressed. In addition, the range of rotation of the rotary stage 36 is a size that is sufficient in practice, and therefore the user can arbitrarily adjust the projection angle of the projector 10 in the direction.

[0073] In addition, assuming that the stand cover 31 is able to rotate 360 degrees with respect to the rotary stage 36, the power supply wiring 21 that is outside the stand cover 31 can be pulled off. In contrast, by adopting this structure, the projection system 1 can be prevented from rotating without limitation, and the possibility of the power supply wiring 21 being pulled off can be reduced.

[0074] [2. Embodiment 2]

[0075] Embodiment 2 will be described. In Embodiment 2, portions that are configured similarly to those of Embodiment 1 described above are labeled with the same reference numerals and the description thereof will be omitted.

[0076] Figure 10 is a perspective view of the hinge unit 200. Figure 11 is an exploded perspective view of the hinge unit 200.

[0077] In Embodiment 1, the protruding portion 102 is formed in the shaft 101. In addition, the position limiting portion 106 is formed in the second bracket 105. The abutting portion 102a and the abutting portion 106a abut by the protruding portion 102 and the position limiting portion 106, and the abutting portion 102b and the abutting portion 106b abut, thereby limiting the range of rotation of the projector 10.

[0078] In embodiment 2, in the hinge unit 200, a position limiting portion 211 is provided in the first bracket 210, forming abutment portions 211a and 211b. A protrusion 206 is provided in the second bracket 205, forming abutment portions 206a and 206b. Abutment portion 206a abuts against abutment portion 211a. Abutment portion 206b abuts against abutment portion 211b. That is, the projector 10 can rotate within a range of two limits, with the positions where abutment portions 206a and 211a abut against each other and the positions where abutment portions 206b and 211b abut against each other. Abutment portion 206a corresponds to an example of a second abutment portion. Abutment portion 206b corresponds to an example of a fourth abutment portion. Abutment portion 211a corresponds to an example of a first abutment portion. Abutment portion 211b corresponds to an example of a third abutment portion.

[0079] The first bracket 210 is fixed to the projector 10.

[0080] like Figure 11 As shown, the shaft 201 has a bearing portion 201a that is radially larger in the middle section. A first bracket 210 and a second bracket 205 are disposed at both ends of the bearing portion 201a. The second bracket 205 is fixed to the shaft 201. A sliding member 203 is disposed adjacent to the support frame 50 side of the second bracket 205. A force-applying member 204 is disposed adjacent to the sliding member 203. A positioning member 208 is disposed adjacent to the force-applying member 204. That is, the sliding member 203, the force-applying member 204, and the positioning member 208 are disposed between the frame base 51 and the second bracket 205.

[0081] The positioning component 208 is a component that restricts the first bracket 210 and other components subjected to force 204 from being pushed outward in the width direction. In this embodiment, the force-applying component 204 is a spring washer.

[0082] [3. Implementation Method 3]

[0083] Embodiment 3 will be described. In Embodiment 3, parts that are constructed in the same way as in Embodiments 1 and 2 are labeled with the same reference numerals and their descriptions are omitted.

[0084] Figure 12 This is a 3D view of hinge unit 300. Figure 13 This is an exploded perspective view of hinge unit 300.

[0085] In embodiment 2, a sliding component 203, a force-applying component 204, and a positioning component 208 are arranged on the support frame 50 side of the second bracket 205.

[0086] In the hinge unit 300 of embodiment 3, a generally C-shaped force-applying member 304 is arranged in a manner that is clamped by the first bracket 310 and the second bracket 305. The shaft 301 is prevented from rotating freely by being fastened by the force-applying member 304. In this embodiment, the force-applying member 304 is a spring washer.

[0087] The second bracket 305 is connected to the support 20. The first bracket 310 is connected to the projector 10. The shaft 301 is fixed to the first bracket 310 and is configured to rotate relative to the second bracket 305.

[0088] like Figure 13 As shown, in the hinge unit 300 of Embodiment 3, a position limiting part 311 is provided in the first bracket 310, forming an abutment part 311a and an abutment part 311b. A protrusion 306 is provided in the second bracket 305, forming an abutment part 306a and an abutment part 306b. The abutment part 306a abuts against the abutment part 311a. The abutment part 306b abuts against the abutment part 311b. That is, the projector 10 can rotate within the range of two limits, with the positions where the abutment part 306a abuts against the abutment part 311a and the positions where the abutment part 306b abuts against the abutment part 311b as limits. The abutment part 306a corresponds to an example of the second abutment part. The abutment part 306b corresponds to an example of the fourth abutment part. The abutment part 311a corresponds to an example of the first abutment part. The abutment part 311b corresponds to an example of the third abutment part.

[0089] [4. Other Implementation Methods]

[0090] The above-described embodiments are merely one way of applying this disclosure, and can be arbitrarily modified and applied without departing from the spirit of this disclosure.

[0091] In the above embodiments, the positions of the force-applying components 104, 204, and 304, as well as the first brackets 110, 210, and 310 and the second brackets 105, 205, and 305 fixed to the shafts 101, 201, and 301, can be appropriately modified. Furthermore, the shafts 101, 201, and 301, the first brackets 110, 210, and 310, and the second brackets 105, 205, and 305 that provide the protrusions 102, 206, and 306 and the position limiting parts 111, 211, and 311 can also be modified.

[0092] The configuration of which of the first brackets 110, 210, 310 and the second brackets 105, 205, 305 is rotatable can also be changed according to the configuration of each component.

[0093] In Embodiment 1, as in Embodiments 2 and 3, the protrusion 102 can be provided in either the second bracket 105 or the first bracket 110, and the position limiting portion 111 can be provided in the other bracket, so as to limit the rotation angle. In Embodiments 2 and 3, the adjustable range of the projection angle can also be limited by providing the protrusion 206, 306 in the shaft 201, 301 and the position limiting portion 211, 311 in the second bracket 205, 305 or the first bracket 210, 310.

[0094] In Embodiment 1, the angle between the optical axis OA when the abutting portion 102a abuts against the abutting portion 106a and the optical axis OA when the abutting portion 102b abuts against the abutting portion 106b is 180 degrees. However, in the projection system 1 of the present application, the angle between the optical axis OA when the abutting portion 102a, 211a, 311a abuts against the abutting portion 106a, 206a, 306a and the optical axis OA when the abutting portion 102b, 211b, 311b abuts against the abutting portion 106b, 206b, 306b can be changed as long as it is within 180 degrees.

[0095] The angle between the optical axis OA when the abutting portion 102a abuts against the abutting portion 106a and the vertical axis of the projection system 1 and the angle between the optical axis OA when the abutting portion 102b abuts against the abutting portion 106b and the vertical axis of the projection system 1 are both 90 degrees. However, in the projection system 1 of the present application, the angle between the optical axis OA when the abutting portion 102a, 211a, 311a abuts against the abutting portion 106a, 206a, 306a and the vertical axis can be changed as long as it is within 120 degrees.

[0096] In addition, the angle between the optical axis OA when the abutting portion 102b, 211b, 311b abuts against the abutting portion 106b, 206b, 306b and the vertical axis can be changed as long as it is within 120 degrees.

[0097] In the above embodiments, the structure of the rotating table 36 can be a structure that rotates 360 degrees relative to the support base 30, or a structure that rotates within a specified range.

[0098] [5. Summary of the disclosure]

[0099] Hereinafter, the summary of the disclosure is attached.

[0100] (Addendum 1) A projection system having: a projector; a support for supporting the projector; a hinge unit linked with the projector and linked with the support, connecting the projector and the support; and a wiring electrically connected with a circuit substrate of the projector, the projector having a projection lens, the projector being able to relatively rotate with respect to the support with a rotation axis intersecting with an optical axis of the projection lens, the support including: a support frame linked with the hinge unit; and a support base linked with the support frame, supporting a weight of the projector and the support frame in a set state of the projection system, the support base having a connection terminal capable of transmission to or electrical connection with an outside, the wiring reaching an inside of the support base from an inside of the projector via an inside of the hinge unit and an inside of the support frame, and electrically connected with the connection terminal, the hinge unit inhibiting relative rotation of the projector with respect to the support.

[0101] Thus, even with a configuration in which the wiring reaches the inside of the support base from the inside of the projector, and a structure in which the projector is able to relatively rotate with respect to the support, by inhibiting relative rotation of the hinge with respect to the support of the projector, relative rotation of the projector with respect to the support can be inhibited. Therefore, the user does not need to pay attention to damage of the wiring when rotating the projector, and operability when rotating the projector can be improved.

[0102] (Addendum 2) The projection system according to Addendum 1, wherein the hinge unit has: a first bracket linked with the projector; a second bracket linked with the support; a force applying member between the first bracket and the second bracket; and a shaft supporting the first bracket, the second bracket, and the force applying member, either of the first bracket and the second bracket being configured to be able to rotate with the shaft as an axis, the force applying member applying a force to the second bracket in a direction from the first bracket toward the second bracket, or applying a force to the first bracket in a direction from the second bracket toward the first bracket, along the shaft, the wiring passing through an inside of the shaft.

[0103] Thus, by means of the elastic force of the force applying member, a force in which the first bracket desires to relatively move away from the second bracket is generated. Therefore, when the first bracket rotates with respect to the second bracket, a frictional force is generated by the elastic force, and free rotation is inhibited. Therefore, relative rotation of the projector with respect to the support can be inhibited. Therefore, without needing to pay attention to damage of the wiring due to rotation of the projector, operability when rotating the projector can be improved.

[0104] (Paragraph 3) The projection system according to Paragraph 2, wherein the shaft is coupled to the first bracket and configured to be relatively rotatable with respect to the second bracket, a first abutting portion is formed in the shaft, a second abutting portion is formed in the second bracket, and the first abutting portion abuts against the second abutting portion when the shaft is relatively rotated with respect to the second bracket, thereby preventing rotation of the shaft with respect to the second bracket.

[0105] Thus, the projector is prevented from rotating with respect to the support by the prescribed amount or more. Therefore, without attention to damage to the wiring due to rotation of the projector, operability when the projector is rotated can be improved.

[0106] (Paragraph 4) The projection system according to Paragraph 2, wherein the shaft is coupled to the second bracket and configured to be relatively rotatable with respect to the first bracket, a first abutting portion is formed in the shaft, a second abutting portion is formed in the first bracket, and the first abutting portion abuts against the second abutting portion when the shaft is relatively rotated with respect to the first bracket, thereby preventing rotation of the shaft with respect to the first bracket.

[0107] Thus, the projector is prevented from rotating with respect to the support by the prescribed amount or more. Therefore, without attention to damage to the wiring due to rotation of the projector, operability when the projector is rotated can be improved.

[0108] (Paragraph 5) The projection system according to Paragraph 2, wherein the shaft is coupled to the first bracket and configured to be relatively rotatable with respect to the second bracket, a first abutting portion is formed in the first bracket, a second abutting portion is formed in the second bracket, and the first abutting portion abuts against the second abutting portion when the first bracket is relatively rotated with respect to the second bracket, thereby preventing rotation of the first bracket with respect to the second bracket.

[0109] Thus, the projector is prevented from rotating with respect to the support by the prescribed amount or more. Therefore, without attention to damage to the wiring due to rotation of the projector, operability when the projector is rotated can be improved.

[0110] (Paragraph 6) The projection system according to Paragraph 1, wherein the hinge unit has a first bracket coupled to the projector, a second bracket coupled to the support, a force applying member applying a force to the first bracket or the second bracket, and a shaft supporting the first bracket, the second bracket, and the force applying member, either of the first bracket and the second bracket being configured to be able to turn about the shaft, in a case where the force applying member applies a force to the first bracket in a direction toward the second bracket, the force applying member, the first bracket, and the second bracket are arranged in this order along the shaft, in a case where the force applying member applies a force to the second bracket in a direction toward the first bracket, the force applying member, the second bracket, and the first bracket are arranged in this order along the shaft, the wiring passing through an inside of the shaft.

[0111] Thus, a force in which the first bracket relatively faces the second bracket is generated by the elastic force of the force applying member. Therefore, when the first bracket turns relative to the second bracket, a frictional force is generated by the elastic force, so that free turning is suppressed. Therefore, relative rotation of the projector with respect to the support can be suppressed. Therefore, without taking care of damage of the wiring due to rotation of the projector, operability when the projector is turned can be improved.

[0112] (Paragraph 7) The projection system according to Paragraph 6, wherein the shaft is coupled to the first bracket and configured to be able to relatively turn with respect to the second bracket, a first abutting portion is formed in the shaft, a second abutting portion is formed in the second bracket, and in a case where the shaft relatively turns with respect to the second bracket, the first abutting portion abuts against the second abutting portion, thereby preventing rotation of the shaft with respect to the second bracket.

[0113] Thus, rotation of the projector with respect to the support is prevented by a predetermined amount or more. Therefore, without taking care of damage of the wiring due to rotation of the projector, operability when the projector is turned can be improved.

[0114] (Paragraph 8) The projection system according to Paragraph 6, wherein the shaft is coupled to the second bracket and configured to be able to relatively turn with respect to the first bracket, a first abutting portion is formed in the shaft, a second abutting portion is formed in the first bracket, and in a case where the shaft relatively turns with respect to the first bracket, the first abutting portion abuts against the second abutting portion, thereby preventing rotation of the shaft with respect to the first bracket.

[0115] Thus, rotation of the projector with respect to the support is prevented by a predetermined amount or more. Therefore, without taking care of damage of the wiring due to rotation of the projector, operability when the projector is turned can be improved.

[0116] (Paragraph 9) The projection system according to Paragraph 6, wherein the shaft is linked to the first bracket and configured to be relatively rotatable with respect to the second bracket, a first abutting portion is formed in the first bracket, a second abutting portion is formed in the second bracket, and the first abutting portion abuts against the second abutting portion in a case where the first bracket is relatively rotated with respect to the second bracket, thereby preventing rotation of the first bracket with respect to the second bracket.

[0117] Thus, the projector is prevented from rotating with respect to the support by the prescribed amount or more. Therefore, without attention to damage to the wiring due to rotation of the projector, operability when the projector is rotated can be improved.

[0118] (Paragraph 10) The projection system according to Paragraph 1, wherein the hinge unit has a first bracket linked to the projector, a second bracket linked to the support, a force applying member between the first bracket and the second bracket, and a shaft supporting the first bracket, the second bracket, and the force applying member, either of the first bracket and the second bracket is configured to be rotatable about the shaft, the force applying member is linked to one of the first bracket and the second bracket which is not configured to be rotatable with respect to the shaft, and applies a force to press the shaft, and the wiring passes through the inside of the shaft.

[0119] Thus, when the first bracket is rotated with respect to the second bracket, the shaft is rotated. The force applying member applies a force to press the shaft, thereby suppressing free rotation of the shaft. Therefore, the projector is prevented from relatively rotating with respect to the support. Therefore, without attention to damage to the wiring when the projector is rotated, operability when the projector 10 is rotated can be improved.

[0120] (Paragraph 11) The projection system according to Paragraph 10, wherein the shaft is linked to the first bracket and configured to be relatively rotatable with respect to the second bracket, a first abutting portion is formed in the shaft, a second abutting portion is formed in the second bracket, and the first abutting portion abuts against the second abutting portion in a case where the shaft is relatively rotated with respect to the second bracket, thereby preventing rotation of the shaft with respect to the second bracket.

[0121] Thus, the projector is prevented from rotating with respect to the support by the prescribed amount or more. Therefore, without attention to damage to the wiring due to rotation of the projector, operability when the projector is rotated can be improved.

[0122] (Paragraph 12) The projection system according to Paragraph 10, wherein the shaft is coupled to the second bracket and configured to be relatively rotatable with respect to the first bracket, a first abutting portion is formed in the shaft, a second abutting portion is formed in the first bracket, and the first abutting portion and the second abutting portion abut each other in a case where the shaft is relatively rotated with respect to the first bracket, thereby preventing rotation of the shaft with respect to the first bracket.

[0123] Thus, the projector is prevented from rotating by more than a predetermined amount with respect to the support. Therefore, without attention to damage to the wiring caused by rotating the projector, operability when the projector is rotated can be improved.

[0124] (Paragraph 13) The projection system according to Paragraph 10, wherein the shaft is coupled to the first bracket and configured to be relatively rotatable with respect to the second bracket, a first abutting portion is formed in the first bracket, a second abutting portion is formed in the second bracket, and the first abutting portion and the second abutting portion abut each other in a case where the first bracket is relatively rotated with respect to the second bracket, thereby preventing rotation of the first bracket with respect to the second bracket.

[0125] Thus, the projector is prevented from rotating by more than a predetermined amount with respect to the support. Therefore, without attention to damage to the wiring caused by rotating the projector, operability when the projector is rotated can be improved.

[0126] (Paragraph 14) The projection system according to any one of Paragraphs 3, 7, and 11, wherein a third abutting portion is formed in the shaft, a fourth abutting portion is formed in the second bracket, the third abutting portion and the fourth abutting portion abut each other in a case where the shaft is relatively rotated with respect to the second bracket, thereby preventing rotation of the shaft with respect to the second bracket, and an angle formed by the optical axis in a case where the first abutting portion and the second abutting portion abut each other and the optical axis in a case where the third abutting portion and the fourth abutting portion abut each other is within 180 degrees when the projection system is viewed from above along the rotation axis.

[0127] Thus, the projector is set to be relatively rotatable with respect to the support. The larger the angle of rotation, the larger the range of movement, and the faster the deterioration of the hinge unit. By limiting the range of movement to within 180 degrees, rotation by more than a predetermined amount is prevented while deterioration of the hinge unit is suppressed, and therefore, without attention to damage to the wiring caused by rotating the projector, operability when the projector is rotated can be improved.

[0128] (Parenthetical Note 15) The projection system according to any one of Parenthetical Notes 14, wherein the position at which the first abutment portion abuts against the second abutment portion is set so that, in a state in which the support base is disposed on a disposition surface, an angle that the optical axis makes with respect to an imaginary axis perpendicular to the disposition surface is within 120 degrees.

[0129] Thus, the operator does not need to pay attention to prevent the face of the projector on which the projection lens is disposed from colliding with the support, and it is possible to prevent the projector from being excessively inclined downward. Therefore, the operability when the projector is turned is improved.

[0130] (Parenthetical Note 16) The projection system according to any one of Parenthetical Notes 4, 8, and 12, wherein a third abutment portion is formed on the shaft, a fourth abutment portion is formed on the first bracket, and in a case in which the shaft is relatively turned with respect to the first bracket, the third abutment portion abuts against the fourth abutment portion, thereby preventing rotation of the shaft with respect to the first bracket, and in a case in which the first abutment portion abuts against the second abutment portion and in a case in which the third abutment portion abuts against the fourth abutment portion, an angle that the optical axis makes with respect to the turning axis is within 180 degrees when the projection system is viewed from above along the turning axis.

[0131] Thus, the projector is disposed so as to be relatively turned with respect to the support. The greater the angle of turning, the greater the range of movement, and the faster the deterioration of the hinge unit. By limiting the range of movement to within 180 degrees, it is possible to prevent rotation to a prescribed degree or more while suppressing deterioration of the hinge unit, and thus the operator does not need to pay attention to damage to the wiring caused by turning the projector, and it is possible to improve the operability when the projector is turned.

[0132] (Parenthetical Note 17) The projection system according to Parenthetical Note 16, wherein the position at which the first abutment portion abuts against the second abutment portion is set so that, in a state in which the support base is disposed on a disposition surface, an angle that the optical axis makes with respect to an imaginary axis perpendicular to the disposition surface is within 120 degrees.

[0133] Thus, the operator does not need to pay attention to prevent the face of the projector on which the projection lens is disposed from colliding with the support, and it is possible to prevent the projector from being excessively inclined downward. Therefore, the operability when the projector is turned is improved.

[0134] (Paragraph 18) The projection system according to any one of Paragraphs 5, 9, and 13, wherein a third abutting portion is formed in the first bracket, a fourth abutting portion is formed in the second bracket, and the third abutting portion abuts against the fourth abutting portion when the first bracket relatively rotates with respect to the second bracket, thereby preventing rotation of the first bracket with respect to the second bracket, and an angle formed by the optical axis when the first abutting portion abuts against the second abutting portion and the optical axis when the third abutting portion abuts against the fourth abutting portion is within 180 degrees when the projection system is viewed from above along the rotation axis.

[0135] Thus, the projector is arranged to be able to relatively rotate with respect to the stand. The greater the angle of rotation, the greater the range of movement, and the faster the deterioration of the hinge unit. By limiting the range of movement to within 180 degrees, it is possible to prevent rotation above a prescribed amount while suppressing deterioration of the hinge unit, and thus it is not necessary to take care to avoid damage to the wiring caused by rotation of the projector, and it is possible to improve the operability when rotating the projector.

[0136] (Paragraph 19) The projection system according to Paragraph 18, wherein the position at which the first abutting portion abuts against the second abutting portion is set so that the angle formed by the optical axis with respect to an imaginary axis perpendicular to the placement surface is within 120 degrees in a state in which the stand base is placed on the placement surface.

[0137] Thus, it is not necessary for the operator to take care to avoid collision of the surface of the projector on which the projection lens is provided with the stand, and it is possible to prevent excessive tilting of the projector downward. Thus, it is possible to improve the operability when rotating the projector.

[0138] (Paragraph 20) The projection system according to any one of Paragraphs 1 to 13, wherein the wiring is a power supply wiring, and the connection terminal is a power supply terminal.

[0139] Thus, by using the connection terminal of the stand base as a power supply terminal, the wiring for power supply does not rotate even if the projector is rotated. Thus, it is possible to reduce the occurrence of detachment of the wiring for power supply when the operator rotates the projector, and it is possible to improve the operability when rotating the projector.

[0140] (Paragraph 21) The projection system according to any one of Paragraphs 1 to 13, wherein the projector has a first side surface and a second side surface in a direction perpendicular to the optical axis, and the stand frame includes a first arm and a second arm, and is arranged in the order of the first arm, the hinge unit, the first side surface, the second arm, and the second side surface along the rotation axis.

[0141] Thus, the support frame is connected to both side surfaces of the projector, and rotation of the projector relative to the support can be suppressed. Therefore, without concern for damage to the wiring due to rotation of the projector, operability when turning the projector can be improved.

[0142] (Addendum 22) The projection system according to any one of addenda 21, wherein, when the projection system is viewed from above in a direction along the rotation axis, the hinge unit is disposed within a range of one-third of a distance from a center of the first side surface to an outer periphery of the first side surface, as viewed from the center of the first side surface.

[0143] Thus, by disposing the position of the hinge near the center of the side surface of the projector, the rotation axis can be brought close to the center of gravity of the projector, and thus rotation of the projector due to its own weight can be suppressed. Therefore, without concern for damage to the wiring due to rotation of the projector, operability when turning the projector can be improved.

[0144] (Addendum 23) The projection system according to any one of addenda 1 to 13, wherein the projection system has a rotation stage that is relatively rotatable relative to the support base, and in a set state of the projection system, the rotation stage is located below the support base, and a holding member that holds the connection terminal is provided to the support base.

[0145] Thus, even in a case where the support base starts to rotate relative to the rotation stage, since the holding member is disposed on the support base side, the connection terminal and the wiring also rotate in conjunction with the support base, and thus damage to the wiring can be reduced. Therefore, without concern for damage to the wiring due to rotation of the projector, operability when turning the projector can be improved.

[0146] (Addendum 24) The projection system according to any one of addenda 1 to 13, wherein the projection system has a rotation stage that is relatively rotatable relative to the support base, and in a set state of the projection system, the rotation stage is located below the support base, a first rotation limiting portion is provided to the support base, a second rotation limiting portion is provided to the rotation stage, and a range of rotation of the rotation stage is limited by abutment of the first rotation limiting portion and the second rotation limiting portion.

[0147] Thus, even in a case where the support base starts to rotate relative to the rotation stage, a range of rotation of the support base can be limited, and thus a case where the wiring installed to the connection terminal comes off can be reduced. Therefore, without concern for damage to the wiring due to rotation of the projector, operability when turning the projector can be improved.

[0148] (Paragraph 25) The projection system according to any one of paragraphs 1 to 13, wherein the projection system includes a protection member that protects the wiring, the protection member covering at least a portion of the wiring that enters from an inside of the projector to an inside of the hinge unit.

[0149] Thus, the inside of the projector and the inside of the hinge unit are configured differently, and thus a step or the like is generated, the wiring comes into contact with the step or the like, and the friction becomes large. By covering this portion with the protection member, the sliding of the wiring can be improved, and wear can be prevented. Thus, the operability when the projector is turned can be improved.

[0150] (Paragraph 26) The projection system according to any one of paragraphs 1 to 13, wherein the projection system includes a protection member that protects the wiring, the protection member covering at least a portion of the wiring that enters from an inside of the hinge unit to an inside of the support frame.

[0151] Thus, the inside of the projector and the inside of the hinge unit are configured differently, and thus a step or the like is generated, the wiring comes into contact with the step or the like, and the friction becomes large. By covering this portion with the protection member, the sliding of the wiring can be improved, and wear can be prevented. Thus, the operability when the projector is turned can be improved.

Claims

1. A projection system, characterized by A projection system comprising: a projector; a support for supporting the projector; a hinge unit coupled to the projector and to the support, connecting the projector and the support; and a wiring electrically connected to a circuit board of the projector, the projector having a projection lens, the projector being capable of relatively rotating with respect to the support about a rotation axis intersecting an optical axis of the projection lens, the support including: a support frame coupled to the hinge unit; and a support base coupled to the support frame, supporting a weight of the projector and the support frame in a set state of the projection system, the support base having a connection terminal capable of transmitting to or electrically connected to an external device, the wiring reaching an inside of the support base from an inside of the projector via an inside of the hinge unit and an inside of the support frame, and electrically connected to the connection terminal, the hinge unit inhibiting relative rotation of the projector with respect to the support.

2. The projection system according to claim 1, wherein the hinge unit has: a first bracket coupled to the projector; a second bracket coupled to the support; a force applying member between the first bracket and the second bracket; and a shaft supporting the first bracket, the second bracket, and the force applying member, either of the first bracket and the second bracket is configured to be rotatable about the shaft, the force applying member applies a force to the second bracket in a direction from the first bracket toward the second bracket, or to the first bracket in a direction from the second bracket toward the first bracket along the shaft, the wiring passes through an inside of the shaft.

3. The projection system according to claim 2, wherein the shaft is coupled to the first bracket and configured to be relatively rotatable with respect to the second bracket, a first abutting portion is formed in the shaft, a second abutting portion is formed in the second bracket, when the shaft is relatively rotated with respect to the second bracket, the first abutting portion abuts against the second abutting portion, thereby preventing rotation of the shaft with respect to the second bracket.

4. The projection system according to claim 2, wherein the shaft is coupled to the second bracket and configured to be relatively rotatable with respect to the first bracket, a first abutting portion is formed in the shaft, a second abutting portion is formed in the first bracket, when the shaft is relatively rotated with respect to the first bracket, the first abutting portion abuts against the second abutting portion, thereby preventing rotation of the shaft with respect to the first bracket.

5. The projection system according to claim 2, wherein the shaft is coupled to the first bracket and configured to be relatively rotatable with respect to the second bracket, a first abutting portion is formed in the first bracket, a second abutting portion is formed in the second bracket, when the first bracket is relatively rotated with respect to the second bracket, the first abutting portion abuts against the second abutting portion, thereby preventing rotation of the first bracket with respect to the second bracket. ​ 6. The projection system according to claim 1, wherein the hinge unit has: a first bracket coupled to the projector; a second bracket coupled to the support; a force applying member applying force to the first bracket or the second bracket; and a shaft supporting the first bracket, the second bracket, and the force applying member, either of the first bracket and the second bracket is configured to be rotatable about the shaft, in a case where the force applying member applies force to the first bracket in a direction toward the second bracket, the force applying member, the first bracket, and the second bracket are arranged in this order along the shaft, in a case where the force applying member applies force to the second bracket in a direction toward the first bracket, the force applying member, the second bracket, and the first bracket are arranged in this order along the shaft, and the wiring passes through the inside of the shaft.

7. The projection system according to claim 6, wherein the shaft is coupled to the first bracket and is configured to be relatively rotatable with respect to the second bracket, a first abutting portion is formed in the shaft, a second abutting portion is formed in the second bracket, in a case where the shaft is relatively rotated with respect to the second bracket, the first abutting portion abuts against the second abutting portion, thereby preventing rotation of the shaft with respect to the second bracket.

8. The projection system according to claim 6, wherein the shaft is coupled to the second bracket and is configured to be relatively rotatable with respect to the first bracket, a first abutting portion is formed in the shaft, a second abutting portion is formed in the first bracket, in a case where the shaft is relatively rotated with respect to the first bracket, the first abutting portion abuts against the second abutting portion, thereby preventing rotation of the shaft with respect to the first bracket.

9. The projection system according to claim 6, wherein the shaft is coupled to the first bracket and is configured to be relatively rotatable with respect to the second bracket, a first abutting portion is formed in the first bracket, a second abutting portion is formed in the second bracket, in a case where the first bracket is relatively rotated with respect to the second bracket, the first abutting portion abuts against the second abutting portion, thereby preventing rotation of the first bracket with respect to the second bracket.

10. The projection system according to claim 1, wherein the hinge unit has: a first bracket coupled to the projector; a second bracket coupled to the support; a force applying member located between the first bracket and the second bracket; and a shaft supporting the first bracket, the second bracket, and the force applying member, either of the first bracket and the second bracket is configured to be rotatable about the shaft, the force applying member is coupled to one of the first bracket and the second bracket which is not configured to be rotatable with respect to the shaft, and applies force to the shaft to press the shaft, and the wiring passes through the inside of the shaft.

11. The projection system according to claim 10, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The shaft is coupled to the first bracket and configured to be relatively rotatable with respect to the second bracket, A first abutting portion is formed in the shaft, A second abutting portion is formed in the second bracket, In a case where the shaft is relatively rotated with respect to the second bracket, the first abutting portion abuts against the second abutting portion, thereby preventing rotation of the shaft with respect to the second bracket.

12. The projection system according to claim 10, wherein The shaft is coupled to the second bracket and configured to be relatively rotatable with respect to the first bracket, A first abutting portion is formed in the shaft, A second abutting portion is formed in the first bracket, In a case where the shaft is relatively rotated with respect to the first bracket, the first abutting portion abuts against the second abutting portion, thereby preventing rotation of the shaft with respect to the first bracket.

13. The projection system according to claim 10, wherein The shaft is coupled to the first bracket and configured to be relatively rotatable with respect to the second bracket, A first abutting portion is formed in the first bracket, A second abutting portion is formed in the second bracket, In a case where the first bracket is relatively rotated with respect to the second bracket, the first abutting portion abuts against the second abutting portion, thereby preventing rotation of the first bracket with respect to the second bracket.

14. The projection system according to any one of claims 3, 7, and 11, wherein A third abutting portion is formed in the shaft, A fourth abutting portion is formed in the second bracket, In a case where the shaft is relatively rotated with respect to the second bracket, the third abutting portion abuts against the fourth abutting portion, thereby preventing rotation of the shaft with respect to the second bracket, When the projection system is viewed from above along the rotation axis, an angle formed by the optical axis in the case where the first abutting portion abuts against the second abutting portion and the optical axis in the case where the third abutting portion abuts against the fourth abutting portion is within 180 degrees with the rotation axis as a center.

15. The projection system according to claim 14, wherein A position where the first abutting portion abuts against the second abutting portion is set so that, in a state where the bracket base is disposed on a disposition surface, an angle formed by the optical axis with respect to an imaginary axis perpendicular to the disposition surface is within 120 degrees.

16. The projection system according to any one of claims 4, 8, and 12, wherein A third abutting portion is formed in the shaft, A fourth abutting portion is formed in the first bracket, In a case where the shaft is relatively rotated with respect to the first bracket, the third abutting portion abuts against the fourth abutting portion, thereby preventing rotation of the shaft with respect to the first bracket, When the projection system is viewed from above along the rotation axis, an angle formed by the optical axis in the case where the first abutting portion abuts against the second abutting portion and the optical axis in the case where the third abutting portion abuts against the fourth abutting portion is within 180 degrees with the rotation axis as a center.

17. The projection system according to claim 16, wherein The position at which the first abutting portion abuts against the second abutting portion is set so that, in a state in which the support base is placed on a placement surface, the optical axis forms an angle of 120 degrees or less with respect to an imaginary axis perpendicular to the placement surface.

18. The projection system according to any one of claims 5, 9, and 13, wherein a third abutting portion is formed in the first bracket, a fourth abutting portion is formed in the second bracket, in a case where the first bracket relatively rotates with respect to the second bracket, the third abutting portion abuts against the fourth abutting portion, thereby preventing rotation of the first bracket with respect to the second bracket, when the projection system is viewed from above in a direction along the rotation axis, an angle formed by the optical axis in a case where the first abutting portion abuts against the second abutting portion and the optical axis in a case where the third abutting portion abuts against the fourth abutting portion is 180 degrees or less with the rotation axis as a center.

19. The projection system according to claim 18, wherein the position at which the first abutting portion abuts against the second abutting portion is set so that, in a state in which the support base is placed on a placement surface, the optical axis forms an angle of 120 degrees or less with respect to an imaginary axis perpendicular to the placement surface.

20. The projection system according to any one of claims 1 to 13, wherein the wiring is a power supply wiring, the connection terminal is a power supply terminal.

21. The projection system according to any one of claims 1 to 13, wherein the projector has a first side surface and a second side surface in a direction perpendicular to the optical axis, the support frame includes a first arm and a second arm, the first arm, the hinge unit, the first side surface, the second arm, and the second side surface are arranged in this order along the rotation axis.

22. The projection system according to claim 21, wherein when the projection system is viewed from above in a direction along the rotation axis, the hinge unit is arranged within a range of one third of a distance from a center of the first side surface to an outer periphery of the first side surface, as viewed from the center of the first side surface.

23. The projection system according to any one of claims 1 to 13, wherein the projection system has a rotation stage that is relatively rotatable with respect to the support base, in a placed state of the projection system, the rotation stage is positioned below the support base, a holding member of the connection terminal is provided to the support base.

24. The projection system according to any one of claims 1 to 13, wherein the projection system has a rotation stage that is relatively rotatable with respect to the support base, in a placed state of the projection system, the rotation stage is positioned below the support base, a first rotation limiting portion is provided to the support base, and a second rotation limiting portion is provided to the rotation stage, a rotation range of the rotation stage is limited by abutment of the first rotation limiting portion against the second rotation limiting portion.

25. The projection system according to any one of claims 1 to 13, wherein the projection system includes a protection member that protects the wiring, the protection member covers at least a portion of the wiring that enters from an inside of the projector to an inside of the hinge unit.

26. The projection system according to any one of claims 1 to 13, wherein the projection system includes a protection member that protects the wiring, the protection member covers at least a portion of the wiring that enters from an inside of the hinge unit to an inside of the support frame.

Images