Projector and fixing member

Abstract

To provide a projector that reduces the likelihood of rotation of a zoom ring or a focus ring caused by impact or vibration.SOLUTION: A projector comprises: a projection lens having a lens barrel that accommodates a lens, and a regulating ring that is rotatably supported by the lens barrel and regulates the position of the lens in an optical axis direction along an optical axis; an exterior housing that accommodates at least part of the projection lens; and a fixing member that is removably mounted on the exterior housing, and that includes a holding part holding the position of the regulating ring and a fixing part fixing the holding part to the exterior housing.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a projector and a fixing member. [Background technology]

[0002] Projectors are used that use a projection optical system to enlarge and project image light generated using light from a light source onto a screen. This type of projector is described in Patent Document 1. The projector in Patent Document 1 includes a light modulation device that modulates light from the light source to form a projection image, and a projection lens that projects the projection image as an enlarged image.

[0003] The projection lens of Patent Document 1 has a lens barrel that houses multiple lenses, a zoom ring that is disposed in front of the lens barrel and has an outer diameter larger than the lens barrel, and a focus ring. When using the projector of Patent Document 1, zoom adjustment is performed by manually rotating the zoom ring. Also, focus adjustment is performed by manually rotating the focus ring. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-071195 Summary of the Invention [Problem to be solved by the invention]

[0005] The projector described in Patent Document 1 may be used in places where it is subject to shocks and vibrations. For example, if the projector is used in a simulation golf game, the projector may be subjected to shocks caused by a user hitting a golf ball. When the projector is subjected to shocks, the zoom ring or focus ring may rotate due to vibrations caused by the shock, which may cause the zoom or focus adjustment to become unbalanced. For this reason, there is a demand for a projector whose zoom ring or focus ring is less likely to rotate due to shocks and vibrations. [Means for solving the problem]

[0006] In order to solve the above problems, the projector of the present invention is characterized by comprising: a lens barrel that houses a lens; a projection lens having an adjustment ring that is rotatably supported on the lens barrel and that adjusts the position of the lens in the optical axis direction along the optical axis; an outer housing that houses at least a portion of the projection lens; and a fixing member that is detachable from the outer housing and includes a holding portion that holds the position of the adjustment ring and a fixing portion that fixes the holding portion to the outer housing.

[0007] Next, a fixing member of the present invention is characterized by being used in the above projector. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is an external perspective view of a projector according to a first embodiment. [Figure 2] FIG. 1 is a diagram showing the internal configuration of a projector according to a first embodiment. [Figure 3] FIG. 2 is an exploded perspective view of the projector of the first embodiment with a fixing member disassembled. [Figure 4] FIG. 2 is a perspective view of the appearance of a projection lens protruding from an exterior housing. [Figure 5] FIG. 2 is a perspective view of a fixing member as seen from one side. [Figure 6] FIG. 10 is a perspective view of the fixing member as seen from the other side. [Figure 7]FIG. 10 is a schematic diagram of a main part of a projector according to a second embodiment. [Figure 8] FIG. 10 is an exploded perspective view of a projector according to a second embodiment, with a fixing member disassembled. [Figure 9] FIG. 2 is a perspective view of the appearance of a projection lens exposed from an opening in an exterior housing. [Figure 10] FIG. [Figure 11] FIG. 10 is an external perspective view of a fixing member according to a first modified example. [Figure 12] FIG. 10 is an exploded perspective view of a projector according to a second modified example, with a fixing member disassembled. [Figure 13] Projection lens exposed from an opening in an exterior housing of a projector according to a second modification [Figure 14] 10 is an external perspective view of a fixing member of Modification 2. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE INVENTION Hereinafter, a projector according to an embodiment of the invention will be described with reference to the drawings.

[0010] (Embodiment 1) FIG. 1 is an external perspective view of the projector of the first embodiment. FIG. 2 is a diagram showing the internal configuration of the projector of the first embodiment. FIG. 3 is an exploded perspective view of the projector of the first embodiment with a fixing member disassembled. FIG. 4 is an external perspective view of a projection lens protruding from an exterior housing. FIG. 5 is a perspective view of the fixing member as seen from one side. FIG. 6 is a perspective view of the fixing member as seen from the other side.

[0011] As shown in Fig. 1, the projector 1 includes an exterior housing 6 that forms the exterior of the projector 1. As shown in Fig. 2, the projector 1 includes a light source device 2, a light modulation element 3 that modulates light emitted from the light source device 2 to form a projection image, a projection lens 4 that projects the projection image as an enlarged image, a fixing member 5 that is detachable from the exterior housing 6, a shift mechanism 7 that shifts the projection lens 4, and a control unit 10. The exterior housing 6 houses the light source device 2, the light modulation element 3, the shift mechanism 7, and the control unit 10. The exterior housing 6 houses a portion of the projection lens 4.

[0012] 2, the light source device 2 includes a light source 21, an illumination optical system 22, and a separation optical system 23. The light source 21 is configured, for example, by an ultra-high pressure mercury lamp, a solid-state light source, or the like. The illumination optical system 22 homogenizes the illuminance distribution of the light from the light source 21. The illumination optical system 22 includes, for example, a multi-lens array, a polarization conversion element, and a superimposing lens.

[0013] The separation optical system 23 separates the light from the illumination optical system 22 into three color lights, red light LR, green light LG, and blue light LB, and causes each of the color lights to be incident on the light modulation element 3. The separation optical system 23 includes, for example, a dichroic mirror, a reflecting mirror, and a field lens.

[0014] As shown in FIG. 2, the light modulation elements 3 are operated by the control unit 10 based on an external image signal such as a video signal. Three light modulation elements 3 are provided. In this embodiment, the light modulation elements 3 are liquid crystal panels. The light modulation element 3R forms a red projection image by modulating the red light LR in accordance with an image signal. The light modulation element 3G forms a green projection image by modulating the green light LG in accordance with an image signal. The light modulation element 3B forms a blue projection image by modulating the blue light LB in accordance with an image signal.

[0015] 2, a dichroic prism 8 is provided between the light modulation element 3 and the projection lens 4. The light modulation element 3R, the light modulation element 3G, and the light modulation element 3B surround the dichroic prism 8 from three directions. The dichroic prism 8 is a prism for light synthesis, and synthesizes the light modulated by each light modulation element 3.

[0016] As shown in FIG. 2, the projection lens 4 projects the projection image formed by modulation by the light modulation element 3 as an enlarged image onto the screen S. The fixing member 5 holds the position of the adjustment ring 43 of the projection lens 4 relative to the exterior housing 6. The shift mechanism 7 shifts the projection lens 4 in a direction perpendicular to the optical axis N of the projection lens 4. This allows the projector 1 to adjust the projection position of the projection lens 4 on the screen S by shifting the optical axis N of the projection lens 4 with the shift mechanism 7.

[0017] (Projection lens details) As shown in FIG. 4, the projection lens 4 protrudes from an opening 610 provided in the front surface 61 of the exterior housing 6. The projection lens 4 includes a lens barrel 42 that houses the lens 41, and an adjustment ring 43 that is rotatably supported by the lens barrel 42. A plurality of lenses 41 are provided. The lenses 41 are disposed inside the lens barrel 42 via a lens frame. The lens barrel 42 includes, for example, a fixed barrel and a cam barrel. The adjustment ring 43 adjusts the position of the lens 41 in the optical axis direction along the optical axis N. The adjustment ring 43 includes a focus ring 44 and a zoom ring 45 that are adjacent to each other in the optical axis direction. The focus ring 44 is disposed on the output side of the projection lens 4, and the zoom ring 45 is disposed on the input side of the projection lens 4.

[0018] The focus ring 44 and the zoom ring 45 have multiple grooves 432 on their outer circumferential surfaces. The grooves 432 extend in the optical axis direction. The grooves 432 are knurled portions 430 formed by knurling the outer circumferential surfaces. The zoom ring 45 has protrusions 431 that protrude outward from the outer circumferential surface in the radial direction centered on the optical axis N. Two protrusions 431 are provided at equally spaced positions in the circumferential direction.

[0019] When performing focus adjustment, the user places his / her finger on the knurled portion 430 of the focus ring 44 and rotates the focus ring 44 relative to the lens barrel 42. This moves the lens required for focus adjustment in the optical axis direction, thereby performing focus adjustment.

[0020] When adjusting the zoom, the user places his / her finger on the knurled portion 430 or the protruding portion 431 of the zoom ring 45 and rotates the zoom ring 45 relative to the lens barrel 42. This moves the lens required for the zoom adjustment in the optical axis direction, thereby performing the zoom adjustment.

[0021] (Details of fixing parts) As shown in FIGS. 3, 5, and 6, the fixing member 5 includes a holding portion 51 that holds the position of the adjustment ring 43, and a fixing portion 52 that fixes the holding portion 51 to the exterior housing 6. In this embodiment, the holding portion 51 is a cylindrical portion 53 into which the projection lens 4 is inserted from the optical axis direction. The inner diameter of the cylindrical portion 53 is slightly larger than the outer diameter of the adjustment ring 43. A flange portion 531 that extends radially outward is provided at the end of the cylindrical portion 53 on the exterior housing 6 side. The cylindrical portion 53 includes a fitting portion 54 that fits onto the protrusion 431, and an engagement portion 55 provided on the inner circumferential surface 530 of the cylindrical portion 53. The fitting portion 54 is an opening 540 formed by cutting out the end of the cylindrical portion 53 and the flange portion 531. Two openings 540 are provided at equally spaced positions in the circumferential direction.

[0022] The engagement portion 55 is a protrusion 550 that engages with the groove 432 of the focus ring 44. The protrusion 550 extends in the optical axis direction. A plurality of protrusions 550 are provided at equal intervals in the circumferential direction of the inner peripheral surface 530. In other words, a plurality of protrusions 550 are provided within a range in which the groove 432 of the focus ring 44 moves when the focus ring 44 rotates.

[0023] The fixing portion 52 is a hook-and-loop fastener 520. Four hook-and-loop fasteners 520 are provided. The hook-and-loop fastener 520 includes a first portion 521 and a second portion 522. As shown in FIG. 6, the first portion 521 is attached to an end surface 532 of the flange portion 531. As shown in FIG. 4, the second portion 522 is attached to the front surface portion 61. The fixing member 5 is attachable to and detachable from the exterior housing 6 by the hook-and-loop fasteners 520.

[0024] (Action and effect) The projector 1 of this embodiment comprises a lens barrel 42 that houses a lens 41, a projection lens 4 that has an adjustment ring 43 that is rotatably supported on the lens barrel 42 and adjusts the position of the lens 41 in the optical axis direction along the optical axis N, an outer housing 6 that houses at least a portion of the projection lens 4, and a fixing member 5 that is detachable from the outer housing 6 and has a holding portion 51 that holds the position of the adjustment ring 43 and a fixing portion 52 that fixes the holding portion 51 to the outer housing 6.

[0025] According to the projector 1 of this embodiment, the fixing member 5 holds the position of the adjustment ring 43 relative to the exterior housing 6, so that even if the projector 1 is subjected to an impact or vibration, the adjustment ring 43 is unlikely to rotate.

[0026] The adjustment ring 43 is a focus ring 44 and a zoom ring 45 that are adjacent to each other in the optical axis direction. The zoom ring 45, which is on the incident side of the projection lens 4, has a protrusion 431 that protrudes radially outward from the outer circumferential surface of the zoom ring 45, centered on the optical axis. The focus ring 44, which is on the exit side of the projection lens 4, has multiple grooves 432 on the outer circumferential surface of the focus ring 44. The holding portion 51 is a cylindrical portion 53 into which the projection lens 4 is inserted from the optical axis direction. The cylindrical portion 53 has a fitting portion 54 that fits into the protrusion 431 and an engaging portion 55 that is provided on the inner circumferential surface 530 of the cylindrical portion 53 and engages with the groove 432. A plurality of engaging portions 55 are provided in the circumferential direction of the inner circumferential surface 530. As a result, since the holding portion 51 is the cylindrical portion 53 that is inserted into the projection lens 4, attachment of the fixing member 5 to the projector 1 is easy. Furthermore, since the fixing member 5 holds the positions of the focus ring 44 and the zoom ring 45, the zoom adjustment or the focus adjustment is unlikely to shift even if the projector 1 is subjected to shock or vibration.

[0027] The fixing portion 52 is a hook-and-loop fastener 520. The fixing member 5 is detachable from the exterior housing 6 by the hook-and-loop fastener 520. This makes it easy to attach the fixing member 5 to the projector 1.

[0028] The projector 1 is equipped with a shift mechanism 7 that shifts the projection lens 4 in a direction perpendicular to the optical axis N. The fixing member 5 maintains the position of the adjustment ring 43 relative to the exterior housing 6, thereby maintaining the position of the projection lens 4 in the perpendicular direction. This makes it difficult for the projection position of the projection lens to shift even if the projector 1 is subjected to shock or vibration.

[0029] (Embodiment 2) FIG. 7 is a schematic diagram of the main parts of a projector 1A of embodiment 2. FIG. 8 is an exploded perspective view of the projector of embodiment 2 with the fixing member disassembled. FIG. 9 is an external perspective view of the projection lens exposed from the opening of the exterior housing. FIG. 10 is a perspective view of the fixing member. In the projector 1A of embodiment 2, the shape of the fixing member 5A is different from that of the projector 1 of embodiment 1. Therefore, in embodiment 2, the same components as in embodiment 1 may be assigned the same reference numerals and descriptions thereof may be omitted.

[0030] 7 and 8, in the projector 1A of the second embodiment, the exterior housing 6 houses the entire projection lens 4. As shown in Fig. 7 and 9, the exterior housing 6 includes a top surface 62 (exterior surface) in which an opening 63 through which the adjustment ring 43 is exposed is formed.

[0031] The projection lens 4 includes a lens barrel 42 that houses the lens 41, and an adjustment ring 43 that is rotatably supported by the lens barrel 42. The adjustment ring 43 adjusts the position of the lens 41 in the optical axis direction along the optical axis N. As shown in FIG. 9 , the adjustment ring 43 includes a focus ring 44 and a zoom ring 45 that are adjacent to each other in the optical axis direction. The focus ring 44 is disposed on the exit side of the projection lens 4, and the zoom ring 45 is disposed on the entrance side of the projection lens 4. The focus ring 44 and the zoom ring 45 each include a protrusion 431 that protrudes radially outward from the outer circumferential surface about the optical axis N.

[0032] 7 and 8, the fixing member 5A includes a first fixing member 91 that holds the position of the focus ring 44 relative to the exterior housing 6, and a second fixing member 92 that holds the position of the zoom ring 45 relative to the exterior housing 6. As shown in FIGS. 8 to 10, the first fixing member 91 includes a holding portion 93 that holds the position of the focus ring 44, and a fixing portion 94 that fixes the holding portion 93 to the exterior housing 6. In this embodiment, the holding portion 93 is a fixing arm 95 that is inserted into the opening 63 and abuts against the outer peripheral surface of the focus ring 44. The fixing arm 95 includes a recess 951 that engages with the protrusion 431 of the focus ring 44. A plate-shaped base 96 is provided at the base of the fixing arm 95.

[0033] The fixing portion 94 is a hook-and-loop fastener 940. Two hook-and-loop fasteners 940 are provided. The hook-and-loop fastener 940 includes a first portion 941 and a second portion 942. As shown in FIG. 10 , the first portion 941 is attached to an end surface 961 of the base portion 96. As shown in FIG. 9 , the second portion 942 is attached to the top surface portion 62. The first fixing member 91 is attachable to and detachable from the exterior housing 6 by the hook-and-loop fastener 940.

[0034] The second fixing member 92 has the same configuration as the first fixing member 91. Therefore, a detailed description of the second fixing member 92 will be omitted.

[0035] (Action and effect) The exterior housing 6 has a top surface 62 (exterior surface) in which an opening 63 is formed, through which the adjustment ring 43 is exposed. The holding portion 51 is a fixed arm 95 that is inserted into the opening 63 and abuts against the outer circumferential surface of the adjustment ring 43. As a result, even in the case of projector 1A in which the adjustment ring 43 is exposed from the opening 63 provided in the exterior housing 6, the fixing member 5A can hold the position of the adjustment ring 43 relative to the exterior housing 6, so that even if an impact or vibration is applied to the projector 1A, the adjustment ring 43 is unlikely to rotate.

[0036] Adjustment ring 43 is a focus ring 44 and a zoom ring 45 that are adjacent to each other in the optical axis direction. Fixed member 5A includes a first fixed member 91 that holds the position of focus ring 44 relative to exterior housing 6, and a second fixed member 92 that holds the position of zoom ring 45 relative to exterior housing 6. As a result, when readjusting the position of either focus ring 44 or zoom ring 45, only the corresponding fixed member 5A needs to be removed, thereby preventing the position of the other from accidentally shifting.

[0037] The focus ring 44 and the zoom ring 45 each have a protrusion 431 that protrudes radially outward from the outer circumferential surface. The first fixing member 91 and the second fixing member 92 each have a recess 951 that engages with the protrusion 431. As a result, the recess 951 engages with the protrusion 431, allowing the fixing member 5A to hold the position of the adjustment ring 43.

[0038] (Variation 1) 11 is an external perspective view of a fixing member of Modification 1. Fixing member 5B of Modification 1 differs from fixing member 5 of Embodiment 1 in that it includes an elastic member 56. Therefore, in Modification 1, the same components as those of Embodiment 1 are denoted by the same reference numerals, and descriptions thereof may be omitted.

[0039] The fixing member 5B includes a holding portion 51 that holds the position of the adjustment ring 43 and a fixing portion 52 that fixes the holding portion 51 to the exterior housing 6. The holding portion 51 is a cylindrical portion 53 into which the projection lens 4 is inserted from the optical axis direction. The cylindrical portion 53 includes a fitting portion 54 that fits into the protrusion 431 and an elastic member 56 that is provided on an inner circumferential surface 530 of the cylindrical portion 53. The elastic member 56 is made of silicone rubber, urethane resin, or the like. In this embodiment, the elastic member 56 is provided in an annular shape on the inner circumferential surface 530 and contacts the outer circumferential surface of the focus ring 44 in an elastically deformed state. Note that the elastic member 56 may also contact the outer circumferential surface of the zoom ring 45 in an elastically deformed state. As a result, the elastic member 56 contacts the outer circumferential surface of the adjustment ring 43 in an elastically deformed state, allowing the fixing member 5B to maintain the position of the adjustment ring 43.

[0040] (Variation 2) Fig. 12 is an exploded perspective view of the fixing member disassembled from projector 1C of modified example 2. Fig. 13 is an external perspective view of the projection lens 4 exposed from the opening 63 of the exterior housing 6 in projector 1C of modified example 2. Fig. 14 is an external perspective view of fixing member 5C of modified example 2. Fixing member 5C of modified example 2 differs from fixing member 5A of embodiment 2 in that it includes an elastic member 97. Therefore, in modified example 2, the same components as those in embodiment 2 are denoted by the same reference numerals, and descriptions thereof may be omitted.

[0041] 13, in projector 1C of modification 2, focus ring 44 and zoom ring 45 have multiple grooves 433 on their outer circumferential surfaces. Grooves 433 extend in the optical axis direction. Grooves 433 are knurled portions 430 formed by knurling the outer circumferential surfaces.

[0042] 12 and 14, the fixed member 5C includes a holding portion 93 that holds the position of the adjustment ring 43, and a fixing portion 94 that fixes the holding portion 93 to the exterior housing 6. In this embodiment, the holding portion 93 is a fixed arm 95 that is inserted into the opening 63 and abuts against the outer circumferential surfaces of both the focus ring 44 and the zoom ring 45. The fixed arm 95 includes an elastic member 97 that contacts the outer circumferential surfaces of the focus ring 44 and the zoom ring 45 in an elastically deformed state. The elastic member 97 is made of silicone rubber, urethane resin, or the like. The elastic member 97 is fixed to the tip surface 952 of the fixed arm 95 with an adhesive or the like.

[0043] The fixing portion 94 is a hook-and-loop fastener 940. Two hook-and-loop fasteners 940 are provided. The hook-and-loop fastener 940 includes a first portion 941 and a second portion 942. As shown in FIG. 14 , the first portion 941 is attached to an end surface 961 of the base portion 96. As shown in FIG. 13 , the second portion 942 is attached to the top surface portion 62. The fixing member 5C is detachable from the exterior housing 6 by the hook-and-loop fastener 520. As a result, the elastic member 97 contacts the outer peripheral surfaces of the focus ring 44 and the zoom ring 45 in an elastically deformed state, allowing the fixing member 5C to maintain the position of the adjustment ring 43. Furthermore, the fixing member 5C can simultaneously maintain the positions of the focus ring 44 and the zoom ring 45 regardless of the positions of the focus ring 44 and the zoom ring 45. As a result, the positions of the focus ring 44 and the zoom ring 45 can be simultaneously maintained by a single fixing member 5C, thereby reducing the number of parts compared to the configuration of the second embodiment.

[0044] (Other variations) In the above embodiment, the fixing portion is a hook-and-loop fastener, but the fixing portion is not limited to a hook-and-loop fastener. The fixing portion may be a screw or a snap fit. The fixing portion may also be configured using a magnet. In a configuration using a magnet, a magnet may be provided on one side of the fixing member 5 and the exterior housing 6, and a magnetic member may be provided on the other side. This configuration makes it easy to attach the fixing member 5 to the projector.

[0045] Summary of this disclosure A summary of this disclosure is provided below.

[0046] (Appendix 1) a projection lens having a lens barrel that houses a lens, and an adjustment ring that is rotatably supported by the lens barrel and that adjusts the position of the lens in an optical axis direction; an exterior housing that houses at least a portion of the projection lens; a fixing member that is detachable from the exterior housing, the fixing member including a holding portion that holds the position of the adjustment ring and a fixing portion that fixes the holding portion to the exterior housing; A projector comprising:

[0047] As a result, the fixing member holds the position of the adjustment ring relative to the exterior housing, so that the adjustment ring is less likely to rotate even if the projector is subjected to shock or vibration.

[0048] (Appendix 2) the adjustment ring includes a protrusion that protrudes radially outward from an outer circumferential surface of the adjustment ring about the optical axis, The projector described in Supplementary Note 1, wherein the holding portion has a fitting portion that fits into the protrusion.

[0049] As a result, the fitting portion fits into the protrusion, allowing the fixing member to hold the position of the adjustment ring.

[0050] (Appendix 3) the adjusting ring has a plurality of grooves or protrusions on an outer peripheral surface of the adjusting ring; the holding portion includes an engaging portion that engages with the groove or the protrusion, The projector described in Appendix 1 or 2, wherein the engagement portion is provided in a plurality of portions within a range in which the groove or the protrusion moves when the adjustment ring rotates.

[0051] As a result, the engaging portions engage with the grooves or protrusions, allowing the fixing member to maintain the position of the adjustment ring. Furthermore, since multiple engaging portions are provided within the range in which the grooves or protrusions move when the adjustment ring rotates, the engaging portions can engage with the grooves or protrusions regardless of the position of the adjustment ring.

[0052] (Appendix 4) 3. The projector according to claim 1, wherein the holding portion includes an elastic member that contacts the outer peripheral surface of the adjustment ring in an elastically deformed state.

[0053] As a result, the elastic member comes into contact with the outer peripheral surface of the adjustment ring in an elastically deformed state, and the fixing member can maintain the position of the adjustment ring.

[0054] (Appendix 5) the holding portion is a cylindrical portion into which the projection lens is inserted from the optical axis direction, the adjustment ring includes a protrusion protruding outward in a radial direction centered on the optical axis from an outer peripheral surface of the adjustment ring, and a plurality of grooves or protrusions provided on the outer peripheral surface of the adjustment ring, the cylindrical portion includes a fitting portion that fits into the protrusion, and an engaging portion that is provided on an inner circumferential surface of the cylindrical portion and engages with the groove or the protrusion, The projector described in Supplementary Note 1, wherein the engagement portion is provided in a plurality of positions in the circumferential direction of the cylindrical portion.

[0055] As a result, since the holding portion is a cylindrical portion that is inserted into the projection lens, it is easy to attach the fixing member to the projector.

[0056] (Appendix 6) the holding portion is a cylindrical portion into which the projection lens is inserted from the optical axis direction, the adjustment ring has a protrusion protruding from an outer circumferential surface outward in a radial direction centered on the optical axis, and a plurality of grooves or protrusions provided on the outer circumferential surface, the cylindrical portion includes a fitting portion that fits into the protrusion, and an elastic member that is provided on an inner circumferential surface of the cylindrical portion, The projector described in Appendix 1, characterized in that when the cylindrical portion is inserted into the projection lens, the elastic member contacts the outer peripheral surface of the adjustment ring in an elastically deformed state.

[0057] As a result, since the holding portion is a cylindrical portion that is inserted into the projection lens, it is easy to attach the fixing member to the projector.

[0058] (Appendix 7) 7. The projector according to claim 1, wherein the adjustment rings are a focus ring and a zoom ring that are adjacent to each other in the optical axis direction.

[0059] As a result, the fixing member holds the positions of the focus ring and zoom ring, so that the zoom adjustment or focus adjustment is less likely to shift even if the projector is subjected to shock or vibration.

[0060] (Appendix 8) the adjustment rings are a focus ring and a zoom ring adjacent to each other in the optical axis direction, the adjustment ring of the focus ring or the zoom ring that is on the incident side of the projection lens includes a protrusion that protrudes outward in a radial direction centered on the optical axis from an outer circumferential surface of the adjustment ring on the incident side, The adjustment ring on the output side of the projection lens out of the focus ring and the zoom ring has a plurality of grooves or protrusions on an outer peripheral surface of the adjustment ring on the output side, the holding portion is a cylindrical portion into which the projection lens is inserted from the optical axis direction, the cylindrical portion includes a fitting portion that fits into the protrusion, and an engaging portion that is provided on an inner circumferential surface of the cylindrical portion and engages with the groove or the protrusion, The projector described in Supplementary Note 1, wherein the engagement portion is provided in a plurality of positions in the circumferential direction of the cylindrical portion.

[0061] This allows the holder to be a cylindrical part that is inserted into the projection lens, making it easy to attach the fixing member to the projector. Also, because the fixing member holds the focus ring and zoom ring in position, the zoom or focus adjustment is less likely to shift even if the projector is subjected to shock or vibration.

[0062] (Appendix 9) the exterior housing includes an exterior surface portion having an opening through which the adjustment ring is exposed, 2. The projector according to claim 1, wherein the holding portion is a fixed arm that is inserted into the opening and abuts against the outer peripheral surface of the adjustment ring.

[0063] As a result, even in a projector in which the adjustment ring is exposed from an opening provided in the exterior housing, the fixing member can hold the position of the adjustment ring relative to the exterior housing, so that the adjustment ring is unlikely to rotate even if an impact or vibration is applied to the projector.

[0064] (Appendix 10) the adjustment ring includes a protrusion that protrudes radially outward from an outer circumferential surface of the adjustment ring about the optical axis, The projector described in Appendix 9, wherein the fixed arm has a recess that engages with the protrusion.

[0065] This allows the recess to engage with the protrusion, allowing the fixing member to hold the position of the adjustment ring.

[0066] (Appendix 11) The projector described in Supplementary Note 9, wherein the fixed arm includes an elastic member that contacts the outer peripheral surface of the adjustment ring in an elastically deformed state.

[0067] As a result, the elastic member comes into contact with the outer peripheral surface of the adjustment ring in an elastically deformed state, and the fixing member can maintain the position of the adjustment ring.

[0068] (Appendix 12) the adjustment rings are a focus ring and a zoom ring adjacent to each other in the optical axis direction, The projector described in any one of Appendix 9 to 11, characterized in that the fixing member comprises a first fixing member that maintains the position of the focus ring relative to the outer housing, and a second fixing member that maintains the position of the zoom ring relative to the outer housing.

[0069] As a result, when readjusting the position of one of the focus ring and zoom ring adjustment rings, only the corresponding fixing member needs to be removed, thereby preventing the position of the other adjustment ring from accidentally shifting.

[0070] (Appendix 13) a shift mechanism for shifting the projection lens in a direction perpendicular to the optical axis, The projector described in any one of appendixes 1 to 8, characterized in that the fixing member maintains the position of the adjustment ring relative to the exterior housing, thereby maintaining the position of the projection lens in the orthogonal direction.

[0071] This means that the projection position of the projection lens is less likely to shift even if the projector is subjected to impact or vibration.

[0072] (Appendix 14) the fixing portion is a hook-and-loop fastener, The projector described in any one of appendixes 1 to 13, wherein the fixing member is detachable from the exterior housing by the hook-and-loop fastener.

[0073] This makes it easy to attach the fixing member to the projector.

[0074] (Appendix 15) A fixing member used in the projector according to any one of Supplementary Notes 1 to 14. [Explanation of symbols]

[0075] 1, 1A, 1C...projector, 2...light source device, 3...light modulation element, 4...projection lens, 5, 5A, 5B, 5C...fixing member, 6...exterior housing, 7...shift mechanism, 8...dichroic prism, 10...control unit, 21...light source, 22...illumination optical system, 23...separation optical system, 41...lens, 42...lens barrel, 43...adjustment ring, 44...focus ring, 45...zoom ring, 51...holding portion, 52...fixing portion, 53...cylindrical portion, 54...fitting portion, 55...engaging portion, 56...elastic member, 61...front portion, 62...top surface portion, 63...opening , 91...first fixing member, 92...second fixing member, 93...holding portion, 94...fixing portion, 95...fixing arm, 96...base, 97...elastic member, 430...knurled portion, 431...protrusion, 432...groove, 433...groove, 520...hook and loop fastener, 521...first part, 522...second part, 530...inner surface, 531...flange portion, 532...end surface, 540...opening, 550...protrusion, 610...opening, 940...hook and loop fastener, 941...first part, 942...second part, 951...recess, 961...end surface, N...optical axis, S...screen.

Claims

1. a projection lens having a lens barrel that houses a lens, and an adjustment ring that is rotatably supported by the lens barrel and that adjusts the position of the lens in an optical axis direction; an exterior housing that houses at least a portion of the projection lens; a fixing member that is detachable from the exterior housing, the fixing member including a holding portion that holds the position of the adjustment ring and a fixing portion that fixes the holding portion to the exterior housing; A projector comprising:

2. the adjustment ring includes a protrusion that protrudes radially outward from an outer circumferential surface of the adjustment ring about the optical axis, The projector according to claim 1 , wherein the holding portion includes a fitting portion that fits into the protrusion.

3. the adjusting ring has a plurality of grooves or protrusions on an outer peripheral surface of the adjusting ring; the holding portion includes an engaging portion that engages with the groove or the protrusion, 3. The projector according to claim 1, wherein a plurality of the engagement portions are provided within a range in which the groove or the protrusion moves when the adjustment ring rotates.

4. 3. The projector according to claim 1, wherein the holding portion includes an elastic member that comes into contact with the outer peripheral surface of the adjustment ring in an elastically deformed state.

5. the holding portion is a cylindrical portion into which the projection lens is inserted from the optical axis direction, the adjustment ring includes a protrusion protruding outward in a radial direction centered on the optical axis from an outer peripheral surface of the adjustment ring, and a plurality of grooves or protrusions provided on the outer peripheral surface of the adjustment ring, the cylindrical portion includes a fitting portion that fits into the protrusion, and an engaging portion that is provided on an inner circumferential surface of the cylindrical portion and engages with the groove or the protrusion, The projector according to claim 1 , wherein a plurality of the engagement portions are provided on the inner circumferential surface in the circumferential direction.

6. the holding portion is a cylindrical portion into which the projection lens is inserted from the optical axis direction, the adjustment ring has a protrusion protruding from an outer circumferential surface in a radial direction around the optical axis, and a plurality of grooves or protrusions provided on the outer circumferential surface, the cylindrical portion includes a fitting portion that fits into the protrusion, and an elastic member that is provided on an inner circumferential surface of the cylindrical portion, The projector according to claim 1 , wherein the elastic member comes into contact with the outer circumferential surface of the adjustment ring in an elastically deformed state when the cylindrical portion is inserted into the projection lens.

7. The projector according to claim 1 , wherein the adjustment rings are a focus ring and a zoom ring adjacent to each other in the optical axis direction.

8. the adjustment rings are a focus ring and a zoom ring adjacent to each other in the optical axis direction, the adjustment ring on the incident side of the projection lens out of the focus ring and the zoom ring includes a protrusion that protrudes radially outward from an outer circumferential surface of the adjustment ring on the incident side about the optical axis, The adjustment ring on the output side of the projection lens out of the focus ring and the zoom ring has a plurality of grooves or protrusions on an outer peripheral surface of the adjustment ring on the output side, the holding portion is a cylindrical portion into which the projection lens is inserted from the optical axis direction, the cylindrical portion includes a fitting portion that fits into the protrusion, and an engaging portion that is provided on an inner circumferential surface of the cylindrical portion and engages with the groove or the protrusion, The projector according to claim 1 , wherein a plurality of the engagement portions are provided on the inner circumferential surface in the circumferential direction.

9. the exterior housing includes an exterior surface portion having an opening through which the adjustment ring is exposed, 2. The projector according to claim 1, wherein the holding portion is a fixed arm that is inserted into the opening and abuts against the outer circumferential surface of the adjustment ring.

10. the adjustment ring includes a protrusion that protrudes radially outward from an outer circumferential surface of the adjustment ring about the optical axis, The projector according to claim 9 , wherein the fixed arm has a recess that engages with the protrusion.

11. The projector according to claim 9 , wherein the fixed arm includes an elastic member that comes into contact with the outer circumferential surface of the adjustment ring in an elastically deformed state.

12. the adjustment rings are a focus ring and a zoom ring adjacent to each other in the optical axis direction, 12. The projector described in any one of claims 9 to 11, wherein the fixing member comprises a first fixing member that holds the position of the focus ring relative to the exterior housing, and a second fixing member that holds the position of the zoom ring relative to the exterior housing.

13. a shift mechanism for shifting the projection lens in a direction perpendicular to the optical axis, The projector according to claim 1 , wherein the fixing member holds the position of the adjustment ring relative to the exterior housing, thereby holding the position of the projection lens in the orthogonal direction.

14. the fixing portion is a hook-and-loop fastener, The projector according to claim 1 , wherein the fixing member is detachable from the exterior housing by the hook-and-loop fastener.

15. A fixing member used in the projector according to claim 1 .

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