Adjusting Ring Fixing Device and Projection Device

Abstract

To provide an adjustment ring fixing device that can be easily attached even when a lens barrel is contained in a housing, and a projector.SOLUTION: An adjustment ring fixing device 50 includes: a screw 51 as a fastening member; a first fixing member (a ring trigger member 52) having a penetration screw hole 52a as a through-hole, the screw 51 penetrating through the hole and being screwed with the hole, and having an engagement inclination unit 52e as an engagement unit; a reception unit 53e for receiving the top end part of the screw 51 screwed with the through-hole 52a and regulating the rotation of an adjustment ring 30; an engagement target opening unit 53c1 as an engagement target unit engaged with the engagement inclination unit 52e; and an engagement inclination unit 53d as a housing engagement unit pressed against a housing 20 containing a lens barrel 80.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to an adjustment ring fixing device and a projection device.

Background Art

[0002] Conventionally, an adjustment ring fixing device for fixing an adjustment ring provided on a lens barrel for manually performing zoom adjustment and focus adjustment has been proposed. For example, Patent Document 1 discloses an adjustment ring fixing device in which a brake ring is provided on the outer periphery of an adjustment ring of a lens barrel provided in a surveillance camera, and a brake member is provided between the adjustment ring and the brake ring. The brake member is provided at the tip of a lock knob that screws into a female screw portion provided above the brake ring. The lock knob is connected to the brake member via a protruding portion that protrudes from the lens barrel main body so as to be located inside the brake ring. When the lock knob is rotated in the tightening direction, the brake member abuts on the adjustment ring from above, and the brake ring abuts on the adjustment ring from below. In this way, by rotating the lock knob, the brake member and the brake ring move in opposite directions to sandwich the adjustment ring, and the adjustment ring is fixed to be non-rotatable with respect to the lens barrel main body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above-described conventional adjustment ring fixing device, when the adjustment ring of the lens barrel is completely exposed, the brake ring of the adjustment ring fixing device can be provided on the outer periphery of the adjustment ring. However, when the lens barrel is housed in a housing and a part of the adjustment ring is exposed from the housing, it may be difficult to attach.

[0005] An object of the present invention is to provide an adjustment ring fixing device and a projection device that can be easily attached even when a lens barrel is housed in a housing.

Means for Solving the Problems

[0006] An adjustment ring fixing device according to an aspect of the present invention is mounted on a housing in which a lens barrel and an adjustment ring for rotating the lens barrel are housed, and a first opening through which a part of the adjustment ring is exposed is provided. An adjustment ring fixing device, comprising: a fastening member formed with a threaded portion; a first fixing member having a through hole and a locking portion that are screwed with the threaded portion of the fastening member; a receiving portion that receives a tip portion of the fastening member penetrating the through hole and restricts rotation of the adjustment ring; a second opening provided with a locked portion that holds the locking portion when the tip of the locking portion is inserted; and a second fixing member including a housing engaging portion inserted into a gap between the housing and the adjustment ring provided at an end of the first opening. The locking portions are respectively provided one by one on both ends of the first fixing member with the through hole therebetween, the second openings are respectively provided one by one corresponding to each of the locking portions, the locking portions are locked by the upper surfaces of the respective locking portions abutting against the opening edges of the respective second openings, the housing engaging portions are respectively provided one by one on both ends of the second fixing member with the receiving portion therebetween, and with the screwing of the threaded portion and the through hole, the locking portions push up the opening edges of the respective second openings, and are pressed against the housing in the gap. By increasing the degree of screwing between the threaded portion and the through hole, the pressure at which a part of the receiving portion abuts against the adjustment ring becomes stronger.

Effects of the Invention

[0007] According to the present invention, it is possible to provide an adjustment ring fixing device and a projection device that can be easily attached even when a lens barrel is housed in a housing.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

[0009] An embodiment of the present invention will be described below. As shown in Fig. 1, a projection device 10 includes a housing 20 in the shape of a substantially rectangular box with its longitudinal direction extending in the left-right direction and having six faces (top face 20a, bottom face 20b, left face 20c, right face 20d, front face 20e, and rear face 20f). The projection device 10 has a projection aperture 11 on the front face 20e side. The projection device 10 emits projection light L from the projection aperture 11. In the following description, the left and right of the projection device 10 refer to the left and right directions relative to the direction in which the projection light L is emitted from the projection aperture 11, and the front and rear refer to the front and rear directions relative to the direction in which the projection light L travels in the projection device 10.

[0010] The housing 20 has an upper case 21 that includes an upper surface 20a and a portion of the right side surface 20d, and a lower case 22 that includes a lower surface 20b (bottom surface) and a portion of the right side surface 20d. The housing 20 has a front panel 23 on the front side, a rear panel 24 on the rear side, and a left panel 25 on the left side. The front panel 23 extends to a left front corner 20g of the housing 20, which has a rounded corner. The front panel 23 also has a projection port opening 23a for the projection port 11, an air intake 23b, and an air exhaust 23c. The rear panel 24 extends to a left rear corner 20h, which has a rounded corner. Although not shown, the rear panel 24 is provided with connection ports such as an air intake and an image input / output connector.

[0011] The edge portions 21a and 22a, which are the connection portions with the right side surface 20d in the upper case 21 and the lower case 22 of the housing 20, are formed in a curved surface shape with an R corner. In addition, the edge portions other than the edge portions 21a and 22a of the housing 20 (for example, the edge portion formed by the upper surface 20a and the left side surface 20c) are substantially right-angled. A connection port for a power plug (not shown) is provided on the right side surface 20d of the lower case 22. Further, an operation panel 21b for performing settings and the like of the projection device 10 is provided on the upper surface 20a of the upper case 21.

[0012] As shown in FIGS. 1 to 4, a lens barrel 80 is housed in the housing 20 of the projection device 10. The lens barrel 80 is provided with adjustment rings 30 (a focus adjustment ring 31 and a zoom adjustment ring 32). The focus adjustment ring 31 and the zoom adjustment ring 32 are set to have a predetermined width in the front-rear direction and are formed in a substantially semi-circular arc shape (see FIGS. 3 and 4), and are provided with knurling on the outer periphery. As shown in FIGS. 1 and 2, a substantially rectangular opening 20a1 is provided at the left front corner portion of the upper surface 20a of the housing 20. The opening 20a1 faces the focus adjustment ring 31 and the zoom adjustment ring 32.

[0013] As shown in FIG. 3, the left and right edges 201 extending in the front-rear direction of the opening 20a1 are each inclined downward toward the adjustment ring 30. The protruding end portion 202 of the downwardly inclined edge 201 is formed in a flat surface shape and has a gap S of 1 mm or less from the adjustment ring 30. Further, as shown in FIG. 4, the front and rear edges 204 extending in the left-right direction of the opening 20a1 are each formed as a horizontal plate-like end surface.

[0014] Adjustment ring fixing devices 50 are respectively attached to the focus adjustment ring 31 and the zoom adjustment ring 32 facing from the opening 20a1, and the focus adjustment ring 31 and the zoom adjustment ring 32 are respectively fixed so as not to rotate.

[0015] The projection device 10 in which the focus adjustment ring 31 and the zoom adjustment ring 32 are fixed by the adjustment ring fixing device 50 so as not to rotate is provided in, for example, an embedded system such as a game machine. In this case, the distance between the screen on which the projection light is projected and the projection device 10 is fixedly set. Therefore, it is not necessary for the user to adjust the focus or zoom. Thus, in order to prevent the focus adjustment ring 31 and the zoom adjustment ring 32 from rotating and shifting during transportation, the focus adjustment ring 31 and the zoom adjustment ring 32 are fixed by the adjustment ring fixing device 50.

[0016] Based on FIGS. 5(a), 5(b), 6(a), and 6(b), the configuration of the adjustment ring fixing device 50 will be described. The adjustment ring fixing device 50 includes a screw 51 (fastening member), a ring trigger member 52 (first fixing member), and a ring lock member 53 (second fixing member). In the present embodiment, a cross-recessed countersunk screw is used as the screw 51. The ring trigger member 52 is formed of a sheet metal material into a plate shape that is long in a direction orthogonal to the optical axis of the lens barrel 80 (the left-right direction of the projection device 10; see FIGS. 1 to 4).

[0017] A through screw hole 52a (through hole) is provided substantially at the center of the ring trigger member 52. A female screw portion is formed in the through screw hole 52a, and the screw 51 passes through and is screwed therein. Around the through screw hole 52a, a trigger member central portion 52b formed in a substantially circular shape is provided. From both sides of the trigger member central portion 52b, trigger member inclined portions 52c that are inclined downward with the same width as the short straight line portions 52c1 are provided via short straight line portions 52c1 having a width narrower than the width (diameter) of the trigger member central portion 52b.

[0018] The ring trigger member 52 is provided with trigger member end flat portions 52d that extend outward from the respective trigger member inclined portions 52c. The trigger member end flat portions 52d are formed in a horizontal flat surface shape parallel to the trigger member central portion 52b. The ring trigger member 52 is provided with locking inclined portions 52e (locking portions) that are inclined upward from the respective trigger member end flat portions 52d.

[0019] The ring lock member 53 is formed of a plate-shaped sheet metal material that is long in a direction orthogonal to the optical axis of the lens barrel 80, similar to the ring trigger member 52. The ring lock member 53 is formed of a sheet metal material that is wider than the ring trigger member 52. The ring lock member 53 is formed to have substantially the same width as the adjustment ring 30. Further, the plate thickness of the ring lock member 53 is smaller (thinner) than the plate thickness of the ring trigger member 52.

[0020] The ring lock member 53 is provided with a circular concave receiving portion 53a that receives the tip of the screw 51 that is screwed into the through screw hole 52a and restricts the rotation of the adjustment ring 30, and flat lock member central portions 53b extending from both sides of the receiving portion 53a are provided. The lock member central portion 53b is provided with a lock member opening 53b1 through which each trigger member inclined portion 52c of the ring trigger member 52 is inserted. Note that the outer end of the lock member opening 53b1 also extends across the lock member chevron portion 53c described later.

[0021] The ring lock member 53 is provided with lock member chevron portions 53c formed in a chevron shape from both ends of the lock member central portion 53b. Each lock member chevron portion 53c is formed such that the outer portion is longer than the rising portion on the receiving portion 53a side. On the outer portion (outer surface) of each lock member chevron portion 53c, a locked opening 53c1 (locked portion) is provided. Each locking inclined portion 52e of the ring trigger member 52 is inserted and locked in each locked opening 53c1. More specifically, the upper surface of each locking inclined portion 52e abuts against the upper opening edge of the locked opening 53c1, and the locking inclined portion 52e is locked in the locked opening 53c1. Further, the ring lock member 53 is provided with an engaging inclined portion 53d that is connected to the lock member chevron portion 53c and is inclined downward. The engaging inclined portion 53d serves as a housing engaging portion that presses against the housing 20.

[0022] To attach the adjustment ring fastening device 50 to the adjustment ring 30, first, as shown in Fig. 7, insert the engaging inclined portion 53d, which is one of the housing engaging portions, into the gap S between the adjustment ring 30 and either one of the left and right edges 201 of the opening 20a1. Then, push the adjustment ring fastening device 50 in by, for example, pressing down the screw 51 with a finger. This causes the ring lock member 53 to bend, and the other engaging inclined portion 53d slides downward following the inclined outer surface of the other edge 201, and is inserted into the gap S on the other side.

[0023] When the screw 51 is tightened after the engaging inclined portions 53d on both sides are inserted into the gaps S on both sides, the tip of the screw 51 abuts against the receiving portion 53a, and the trigger member central portion 52b (i.e., the ring trigger member 52) where the screw through hole 52a is provided rises. Then, the engaging inclined portion 52e abuts against the edge of the engaging opening 53c1, pushing up the ring lock member 53. More specifically, because the ring trigger member 52 is formed thicker than the ring lock member 53, the ring lock member 53 bends in a direction such that the receiving portion 53a faces downward and the engaging inclined portions 53d on both ends face upward.

[0024] 3, the upper surfaces of the engaging inclined portions 53d are pressed tightly against the protruding ends 202 at the left and right edges 201 of the opening 20a1. At this time, the lower surface of the receiving portion 53a of the ring lock member 53 descends and comes into contact with the adjusting ring 30. Then, the adjusting ring 30 is fixed by the frictional force between the lower surface of the receiving portion 53a and the adjusting ring 30, and rotation is restricted.

[0025] If the adjustment ring 30 is made of resin or the like and the knurling on the outer periphery is easily scratched, a cushioning material 35 such as a cotton member can be provided between the underside of the receiving portion 53a and the adjustment ring 30.

[0026] Here, the rotation of the adjustment ring 30 is caused by frictional force (f = μN, where μ is the coefficient of friction and N is the normal force). When turning the adjustment ring 30 by hanging a finger on the knurling on the outer periphery of the adjustment ring 30, if the force pushing the adjustment ring 30 in the radial direction by the finger is P, then P = N holds. And when turning the adjustment ring 30 with a finger, the finger receives the frictional force f from the knurling of the adjustment ring 30. When the force T for rotating the knurling with a finger exceeds the frictional force f, the adjustment ring 30 can be rotated (the rotation condition at this time is T > f = μN = μP). Therefore, if the frictional force f generated when rotating the adjustment ring 30 is greater than the force T for rotating the knurling with a finger, the adjustment ring 30 cannot be rotated with a finger. To increase the frictional force f, the normal force N may be increased. In other words, the force in the radial direction P (i.e., the axial force of the screw 51) may be strengthened (the locking condition is T ≤ μN = μP).

[0027] The adjustment ring fixing device 50 can fix the adjustment ring 30 by increasing the frictional force f between the lower surface of the receiving portion 51a and the adjustment ring 30 with the axial force of the screw 51. The ring trigger member 52 applies the fastening force with which the screw 51 and the through screw hole 52a are screwed together in the radial direction of the adjustment ring 30, and when the ring trigger member 52 itself is lifted by the normal force of the fastening of the screw 51, it pushes up the ring lock member 53. The ring lock member 53 pushed up by the ring trigger member 52 contacts the housing 20 from the inside and pushes it up. In this way, the fastening force (axial force of the screw 51) of the screw 51 balances the force pushing the adjustment ring 30 and the force pushing up the housing 20 from the inside, and the adjustment ring 30 is locked.

[0028] The adjustment ring fixing device 50 can be removed from the projection device 10 by loosening the screw 51. Therefore, when misalignment occurs in focus or focus over time and adjustment is required, the adjustment ring fixing device 50 can be removed and readjustment can be easily performed.

[0029] Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment and can be implemented with various modifications. For example, although the adjustment ring fixing device 50 is provided in the projection device 10 in this embodiment, it can also be attached to other devices that include an adjustment ring.

[0030] According to the above embodiment, the adjustment ring fixing device 50 has a screw 51 which is a fastening member, a ring trigger member 52 (first fixing member) which has a through-hole screw hole 52a which is a through-hole through which the screw 51 passes and screws into, and a locking inclined portion 52e which is a locking portion, a receiving portion 53a which receives the tip of the screw 51 which screws into the through-hole screw hole 52a and restricts the rotation of the adjustment ring 30, an interlocking opening 53c1 which is an interlocking portion which interlocks with the interlocking inclined portion 52e, and an interlocking inclined portion 53d which is a housing interlocking portion which is pressed against the housing 20 in which the lens barrel 80 is stored.

[0031] As a result, when the screw 51 is tightened, the axial force of the screw 51 is applied to the adjustment ring 30 by the receiving portion 53a, and the engaging inclined portion 53d is pressed against and engaged with the protruding end 202 of the opening 20a1 of the housing 20, thereby fixing the adjustment ring fastening device 50. To attach the adjustment ring fastening device 50, it is sufficient to simply insert one of the engaging inclined portions 53d into the opening 20a1 where the adjustment ring 30 is exposed and tighten the press-in screw 51. Therefore, attachment is easy even when the lens barrel is stored inside the housing.

[0032] Furthermore, ring trigger member 52 is formed in the shape of a long plate extending in a direction perpendicular to the optical axis of lens barrel 80, with both end portions serving as locking inclined portions 52e, and threaded through hole 52a being provided between locking inclined portions 52e. This allows screw 51 to be positioned in the center and axial force to be applied to adjustment ring 30, so that both end portions of screw 51 can be engaged with housing 20, allowing adjustment ring fastening device 50 to be attached in a balanced manner.

[0033] Furthermore, ring trigger member 52 has flat trigger member central portion 52b in which threaded through hole 52a is formed, trigger member inclined portions 52c sloping downward from both sides of trigger member central portion 52b, trigger member end flat portions 52d extending outward from each trigger member inclined portion 52c, and locking inclined portions 52e sloping upward from each trigger member end flat portion 52d. This ensures that ring lock member 53 and locking inclined portions 52e are securely locked together, while also ensuring that the force with which ring trigger member 52 moves upward by screw 51 is transmitted to ring lock member 53.

[0034] Ring locking member 53 also has flat locking member central portion 53b in which receiving portion 53a is recessed, locking member angled portions 53c connected on both sides of locking member central portion 53b to form an angled shape, engaging inclined portions 53d connected to each locking member angled portion 53c and inclined downward, locking member openings 53b1 provided at least in locking member central portion 53b and through which each trigger member inclined portion 52c of ring trigger member 52 is inserted, and locked openings 53c1 provided on the outer surface of locking member angled portion 53c and with the opening edge onto which locking inclined portion 52e is locked. This allows ring locking member 53 to receive the axial force of screw 51 at receiving portion 53a while engaging inclined portions 53d reliably with housing 20.

[0035] Additionally, engaging inclined portion 53d, which is a housing engaging portion, is inserted into the gap between housing 20 and lens barrel 80 and engages with housing 20. This ensures that adjustment ring fixing device 50 is fixed to housing 20 and can be easily attached to housing 20.

[0036] Furthermore, ring lock member 53 is formed to have the same width as adjustment ring 30 provided on lens barrel 80. This allows screw 51 to be positioned in the center of adjustment ring 30 in the width direction, allowing the axial force of screw 51 to be applied to adjustment ring 30 in a balanced manner.

[0037] In addition, the ring lock member 53 and the ring trigger member 52 are formed of sheet metal material, and the ring lock member 53 has a thinner plate thickness than the ring trigger member 52. Thereby, the ring lock member 53 can be efficiently deformed, and the adjustment ring fixing device 50 can be attached to the housing 20 while securely fixing the adjustment ring 30.

[0038] Further, the projection device 10 has an opening 20a1 facing the zoom adjustment ring 32 and the focus adjustment ring 31 attached to the lens barrel 80, and the adjustment ring fixing device 50 is attached to each of the zoom adjustment ring 32 and the focus adjustment ring 31 in the opening 20a1. Thereby, a projection device 10 with an adjustment ring fixing device 50 attached to each adjustment ring 30 can be provided.

[0039] Note that the embodiments described above are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and its equivalent scope.

[0040] The invention described in the first claim of the present application is appended below. [1] A fastening member, A first fixing member including a through hole through which the fastening member passes and a locking portion, A receiving portion that receives the tip of the fastening member passing through the through hole and restricts the rotation of the adjustment ring, a locked portion that locks with the locking portion, and a housing engaging portion that presses against a housing in which a lens barrel is housed, a second fixing member provided; An adjustment ring fixing device, characterized by comprising: [2] The first fixing member is formed in a plate shape that is long in a direction orthogonal to the optical axis of the lens barrel, and each of both end portions is the locking portion, and the through hole is provided between the locking portions. The adjustment ring fixing device according to [1], characterized in that: [3] The adjustment ring fixing device described in [1] or [2], characterized in that the first fixing member has a flat trigger member central portion in which the through hole is provided, trigger member inclined portions sloping downward from both sides of the trigger member central portion, trigger member end flat portions extending outward from each of the trigger member inclined portions, and locking inclined portions sloping upward from each of the trigger member end flat portions to form the locking portion. [4] The second fixing member has a flat locking member central portion in which the receiving portion is recessed, a locking member mountain-shaped portion connected to the locking member central portion and formed in a mountain shape, engaging inclined portions connected to each locking member mountain-shaped portion and inclined downward to form the housing engaging portion, a locking member opening provided at least in the locking member central portion and through which each trigger member inclined portion of the first fixing member is inserted, and an engaging opening provided on the outer surface of the locking member mountain-shaped portion and forming the engaging portion with the opening edge to engage with the engaging inclined portion. [5] An adjustment ring fixing device described in any of [1] to [4], characterized in that the housing engagement portion is inserted into the gap between the housing and the lens barrel and engages with the housing. [6] The adjustment ring fixing device described in any one of [1] to [5], characterized in that the second fixing member is formed to have the same width as the adjustment ring provided on the lens barrel. [7] An adjustment ring fixing device described in any of [1] to [6], characterized in that the second fixing member and the first fixing member are formed from sheet metal material, and the second fixing member has a thinner plate thickness than the first fixing member. [8] The adjustment ring fixing device according to any one of [1] to [7], an opening facing a zoom adjustment ring and a focus adjustment ring attached to the lens barrel; and The projection device is characterized in that the adjustment ring fixing device is attached to each of the zoom adjustment ring and the focus adjustment ring at the opening.

Description of Symbols

[0041] 10 Projection device 11 Projection opening 20 Housing 20a Upper surface 20a1 Opening 20b Lower surface 20c Left side surface 20d Right side surface 20e Front surface 20f Rear surface 20g Left front corner 20h Left rear corner 21 Upper case 21a Edge 21b Operation panel 22 Lower case 22a Edge 23 Front panel 23a Projection opening 23b Air inlet 23c Exhaust port 24 Rear panel 25 Left panel 30 Adjustment ring 31 Focus adjustment ring 32 Zoom adjustment ring 35 Buffer material 50 Adjustment ring fixing device 51 Screw 51a Receiving part 52 Ring trigger member 52a Through screw hole 52b Central part of trigger member 52c Inclined part of trigger member 52c1 Short straight part 52d Flat part at the end of trigger member 52e Locking inclined part 53 Ring lock member 53a Receiving part 53b Central part of lock member 53b1 Opening of lock member 53c Ridge part of lock member 53c1 Locked opening 53d Engaging inclined part 80 Lens barrel 201 Edge 202 Protruding end 204 Edge L Projection light S Gap

Claims

1. An adjustment ring fixing device mounted on a housing that houses a lens barrel and an adjustment ring for rotating the lens barrel, and is provided with a first opening through which a part of the adjustment ring is exposed, comprising: A fastening member formed with a threaded portion; A first fixing member having a through hole that engages with the threaded portion of the fastening member and a locking portion; A receiving portion that receives the tip of the fastening member passing through the through hole and restricts the rotation of the adjustment ring, a locked portion provided with a second opening into which the tip of the locking portion is inserted to hold the locking portion, and a housing engaging portion inserted into a gap between the housing and the adjustment ring provided at an end of the first opening; Having; The locking portions are provided one each on both ends of the first fixing member with the through hole therebetween; The second openings are provided one each corresponding to each of the locking portions; The locking portions are locked by the upper surfaces of the respective locking portions abutting against the opening edges of the respective second openings; The housing engaging portions are provided one each on both ends of the second fixing member with the receiving portion therebetween, and are pressed against the housing in the gap as the screwing of the threaded portion and the through hole causes the locking portions to push up the opening edges of the respective second openings; By increasing the degree of screwing of the threaded portion and the through hole, the pressure of a part of the receiving portion abutting against the adjustment ring becomes stronger; An adjustment ring fixing device characterized by the above.

2. The first fixing member is formed in a plate shape that is long in a direction orthogonal to the optical axis of the lens barrel, and both end portions thereof are the locking portions, and the through hole is provided between the locking portions. The adjustment ring fixing device according to claim 1.

3. The first fixing member has a flat trigger member central portion provided with the through hole, trigger member inclined portions that incline downward from both sides of the trigger member central portion, trigger member end flat portions that extend outward from the respective trigger member inclined portions, and locking inclined portions that incline upward from the respective trigger member end flat portions to form the locking portions. The adjustment ring fixing device according to claim 1 or claim 2.

4. The second fixing member includes a flat central portion of the locking member where the receiving portion is provided in a concave shape, two locking member mountain-shaped portions formed in a mountain shape by connecting to both ends of the central portion of the locking member respectively, engaging inclined portions that are connected to respective ends on the side opposite to the central portion of the locking member in each of the locking member mountain-shaped portions and incline downward to constitute each of the housing engaging portions, two locking member openings provided at least in the central portion of the locking member through which the respective trigger member inclined portions of the first fixing member are inserted, and locking openings that are provided on the outer surface of each of the locking member mountain-shaped portions and constitute the second openings of the locked portions where the respective locking inclined portions are locked to the respective opening edges. The adjustment ring fixing device according to claim 3, characterized by having the above.

5. The second fixing member is formed to have the same width as the adjustment ring provided in the lens barrel. The adjustment ring fixing device according to any one of claims 1 to 4, characterized by this.

6. The second fixing member and the first fixing member are formed of a sheet metal material, and the second fixing member has a thinner plate thickness than the first fixing member. The adjustment ring fixing device according to any one of claims 1 to 5, characterized by this.

7. The adjustment ring fixing device according to any one of claims 1 to 6, the first opening facing the zoom adjustment ring and the focus adjustment ring attached to the lens barrel, having, The adjustment ring fixing device is attached to each of the zoom adjustment ring and the focus adjustment ring in the first opening. A projection device characterized by this.

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