Adjusting member fixing device, projection device, and adjusting member fixing method

Abstract

The present invention provides an adjustment component fixing device, a projection device, and a method for fixing the adjustment component, so that even if the adjustment ring is fixed, the optical axis of the lens barrel is difficult to deviate. The adjustment component fixing device (50) fixed to the opening (20a1) of the housing (20) of the projection device (10) includes an adjustment component fixing part (55A), which has: a first state in which the width (D1) is shorter than the gap (S3) in order to insert into the gap (S3) on the lens barrel (80) side; and a second state in which the width (D2) is the same as the gap (S3) in order to fix the adjustment ring (30) (focus adjustment ring (31) and zoom adjustment ring (32)) provided on the lens barrel (80) side as a movable adjustment component.

Description

[0001] Cross-references to related applications

[0002] This application claims priority based on Japanese Patent Application No. 2021-117727 and Japanese Patent Application No. 2021-117729, both filed on July 16, 2021, and incorporates the entire contents of those basic applications into this application. Technical Field

[0003] This disclosure relates to an adjusting component fixing device, a projection device, and a method for fixing the adjusting component. Background Technology

[0004] A device for fixing adjustment components has been proposed for a long time, which fixes adjustment components such as adjustment rings located in the lens barrel for manual zoom and focus adjustments. For example, International Publication No. 2013 / 121832 discloses an adjustment component fixing device in which a brake ring is provided on the outer periphery of the adjustment ring of the lens barrel of a surveillance camera, and a brake component is provided between the adjustment ring and the brake ring. The brake component is provided at the front end of a locking knob that is threaded to an internal thread portion located on the upper side of the brake ring. The locking knob is connected to the brake component via a protrusion protruding from the lens barrel body, located inside the brake ring. When the locking knob is rotated in the tightening direction, the brake component abuts against the adjustment ring from above, and the brake ring abuts against the adjustment ring from below. In this way, by rotating the locking knob, the brake component and the brake ring move in opposite directions to clamp the adjustment ring, so that the adjustment ring is fixed relative to the lens barrel body without rotation.

[0005] In the existing adjusting component fixing device described above, the adjusting ring is pressed down by clamping from both the upper and lower sides. However, if the timing of pressing the adjusting ring from the top and bottom is inconsistent, the optical axis of the lens barrel may sometimes shift because the force from one side (top or bottom) is applied to the lens barrel first. To prevent this, the timing of pressing the adjusting ring needs to be the same; however, precisely matching the timing requires high-precision component machining and assembly, which is very difficult. Summary of the Invention

[0006] One aspect of this disclosure is an adjustment component fixing device, characterized in that it includes an adjustment component fixing part, which has: a first state for inserting into a gap on the lens barrel side, and having a width shorter than the gap; and a second state for fixing a movable adjustment component disposed on the lens barrel side, and having a width the same as the gap.

[0007] Another aspect of this disclosure provides a projection device, characterized in that it is equipped with the aforementioned adjustment component fixing device.

[0008] Another aspect of this disclosure provides a method for fixing an adjustment component, characterized by comprising: a first step of inserting the adjustment component fixing part of an adjustment component fixing device in a first state where the width is shorter than the gap on the lens barrel side into the gap; and a second step of fixing the adjustment component by making the adjustment component fixing part in a second state where the width is the same as the gap.

[0009] According to this disclosure, an adjustment component fixing device, a projection device, and a method for fixing the adjustment component can be provided, which make it difficult for the optical axis of the lens barrel to deviate even when the adjustment component is fixed. Attached Figure Description

[0010] Figure 1 This is a perspective view showing the appearance of a projection device on which an adjustment component fixing device according to an embodiment of the present disclosure is mounted.

[0011] Figure 2 This is an enlarged partial top view of a projection device on which the adjusting component fixing device of the present disclosure is installed.

[0012] Figure 3A This is a perspective view showing the adjusting component fixing device according to an embodiment of the present disclosure, viewed from the upper front side.

[0013] Figure 3B This is a perspective view showing the adjusting component fixing device according to an embodiment of the present disclosure, viewed from the lower rear side.

[0014] Figure 4 This is an exploded perspective view of the adjusting component fixing device according to an embodiment of the present disclosure.

[0015] Figure 5 This is equivalent to the state in which the adjusting component fixing device of the present disclosure is installed in front of the projection device. Figure 2 Sectional view of section III-III.

[0016] Figure 6 This is equivalent to the state in which the adjusting component fixing device of the present disclosure is installed in front of the projection device. Figure 2 A sectional view of section IV-IV.

[0017] Figure 7A This refers to the situation where the adjustment component fixing device of the present disclosure is mounted on the projection device. Figure 2 The cross-sectional view of section III-III shows the state in which one of the second abutting parts of a pair of engaging parts is inserted into the gap S2.

[0018] Figure 7B This refers to the situation where the adjustment component fixing device of the present disclosure is mounted on the projection device. Figure 2 The cross-sectional view of section III-III shows the state before the second threaded component is screwed in.

[0019] Figure 8 This indicates the case where the adjustment component fixing device of the present disclosure is mounted on the projection device, corresponding to FIG7(B). Figure 2 A sectional view of section IV-IV.

[0020] Figure 9 It is a projection device on which the adjusting component fixing device of the present disclosure is installed. Figure 2 Sectional view III-III.

[0021] Figure 10 The section shows the adjusting component fixing device, adjusting ring, and upper housing according to the embodiments of this disclosure. Figure 2 Sectional view IV-IV. Detailed Implementation

[0022] The following describes the methods used to implement this disclosure. Figure 1 As shown, the projection device 10 includes a housing 20, which is a generally elongated rectangular box with six surfaces (upper surface 20a, lower surface 20b, left side surface 20c, right side surface 20d, front surface 20e, and rear surface 20f) along its long side in the left-right direction. The projection device 10 has a projection port 11 on the front surface 20e side. The projection device 10 emits projection light L from the projection port 11. Furthermore, in the following description, left and right in the projection device 10 refer to the left-right direction relative to the emission direction of the projection light L from the projection port 11, and front and back refer to the front-back direction relative to the travel direction of the projection light L from the projection device 10.

[0023] The housing 20 includes: an upper shell 21 having an upper surface 20a and a portion of a right side surface 20d; and a lower shell 22 having a lower surface 20b and a portion of a 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 the left front corner 20g of the housing 20, and the left front corner 20g is rounded. Additionally, the front panel 23 is provided with a projection port opening 23a for the projection port 11, an air intake 23b, and an exhaust port 23c. The rear panel 24 extends to the left rear corner 20h, and the left rear corner 20h is rounded. Although not shown, the rear panel 24 is provided with an air intake, an image input / output connector, and other connection ports.

[0024] The edges 21a and 22a of the upper housing 21 and lower housing 22 of the housing 20, which serve as the connection points with the right side surface 20d, are curved surfaces with rounded angles. Furthermore, the edges of the housing 20 other than the edges 21a and 22a (e.g., edges formed by the upper surface 20a and the left side surface 20c) are approximately right angles. A power plug connection port (not shown) is provided on the right side surface 20d of the lower housing 22. Additionally, an operation panel 21b for setting the projection device 10 is provided on the upper surface 20a of the upper housing 21.

[0025] like Figure 1 , Figure 2 As shown, the housing 20 of the projection device 10 houses a lens barrel 80 with the optical axis set to LC. The lens barrel 80 is equipped with movable adjustment rings 30 (focus adjustment ring 31 (first adjustment component) and zoom adjustment ring 32 (second adjustment component)) that serve as adjustment members. Regarding the focus adjustment ring 31 and zoom adjustment ring 32, viewed from the optical axis LC direction, they are approximately semi-circular rings around the optical axis LC (see reference). Figures 5-10 The outer periphery of the large-diameter portion 31a for hooking the finger is knurled. For example... Figure 6 As shown, the small-diameter portion 31b at the rear of the focusing adjustment ring 31 is extended and inserted into the inner diameter portion on the front side of the large-diameter portion 32a of the open zoom adjustment ring 32. Therefore, a gap S1 is formed between the small-diameter portion 31b of the focusing adjustment ring 31 and the large-diameter portion 32a of the zoom adjustment ring 32. Furthermore, a gap S3 on the lens barrel 80 side is formed between the rear end face 31a1 of the large-diameter portion 31a of the focusing adjustment ring 31 and the front end face 32a1 of the large-diameter portion 32a of the zoom adjustment ring 32. Figure 1 and Figure 2 As shown, a roughly rectangular opening 20a1 is provided at the front left corner of the upper surface 20a of the housing 20. The opening 20a1 is provided for operating the adjustment ring 30 and faces the adjustment ring 30 (focus adjustment ring 31 and zoom adjustment ring 32).

[0026] like Figure 5 As shown, the edges 201 of the opening 20a1, which extend in the front-rear direction and are arranged opposite each other, slope downward toward the adjustment ring 30. The front end face 202 of the downwardly sloped edge 201 is formed as a flat surface and has a gap S2 of less than 1 mm with the adjustment ring 30. In addition, a partition plate 203 is vertically provided on the lower surface of the edge 201 between the focus adjustment ring 31 and the zoom adjustment ring 32, with the plate surface orthogonal to the optical axis LC. Furthermore, as Figure 6 As shown, the edges 204 of the opening 20a1, which extend in the left-right direction and are arranged in opposite directions, are each formed as horizontal plate-shaped end faces.

[0027] An adjustment component fixing device 50 is fixed to the opening 20a1, which fixes the focus adjustment ring 31 and the zoom adjustment ring 32. The focus adjustment ring 31 and the zoom adjustment ring 32 are fixed by the adjustment component fixing device 50 to a non-rotating projection device 10, such as an embedded system installed in a game console. In this case, the distance between the screen from 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 and zoom. Therefore, 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 component fixing device 50.

[0028] Based on Figure 3(A), Figure 3(B), Figure 4 The structure of the adjusting component fixing device 50 will be described. The adjusting component fixing device 50 includes: a main body 50a, which is integrally formed from sheet metal; and a first threaded component 51, which faces the front-back direction (in other words, the optical axis LC direction of the lens barrel 80) when mounted on the projection device 10. Figure 1 The first threaded component 51 and the second threaded component 52 are disposed on the main body 50a, and are arranged on the main body 50a in a manner orthogonal to the axis of the first threaded component 51 when viewed from above. The first threaded component 51 and the second threaded component 52 are respectively mounted via washers 53. The main body 50a of the adjusting component fixing device 50 includes an adjusting component fixing part 55A and a main body fixing part 56 for fixing the adjusting component fixing device 50 to the side of the housing 20 for housing the lens barrel 80. Furthermore, the adjusting component fixing part 55A has a pair of adjusting component fixing parts 55, and the main body fixing part 56 has a pair of engaging parts 57.

[0029] The main body 50a has a generally long rectangular plate-shaped upper panel 54 that is longer in the left-right direction. The upper panel 54 is arranged with its short side approximately parallel to the optical axis LC. Numbers indicating the tightening sequence ("1" for the second threaded component 52 and "2" for the first threaded component 51) and arrows indicating the front side are engraved on the upper panel 54. By mounting the adjustment component fixing device 50 to the projection device 10 according to this engraving, the heads of the first threaded component 51 and the second threaded component 52 are shorter than the side walls of the projection device 10 (left and front sides), thus facilitating the rotation operation of the first threaded component 51 and the second threaded component 52. The upper panel 54 is arranged with its plate surface facing the vertical direction. A pair of adjustment component fixing portions 55 of the main body 50a extend downward from the two edges of the long side of the upper panel 54. On the other hand, a pair of engaging portions 57 of the main body fixing portion 56 of the main body 50a extend downward from the two edges of the short side of the upper panel 54.

[0030] Each pair of adjustment component fixing portions 55 has a generally trapezoidal connecting plate 551, which is connected to the long side of the upper panel 54 at its upper end at a generally right angle to the upper panel 54. Additionally, each adjustment component fixing portion 55 has a generally elongated rectangular horizontal plate portion 552, which is configured to connect to the lower end of the connecting plate 551 at a generally right angle to the connecting plate 551, with its surface facing the opposing connecting plate 551 generally horizontally in the vertical direction. Furthermore, each adjustment component fixing portion 55 has a generally elongated rectangular insertion claw portion 553, which is connected at a generally right angle to the end of the horizontal plate portion 552 opposite to the connection portion of the connecting plate 551, and extends downwards. The lower long side of the insertion claw portion 553 is formed into a generally concave arc shape mimicking the outer peripheral surface of the small diameter portion 31b of the focusing adjustment ring 31.

[0031] The connecting plate 551 has: a first plate portion 551a of the same width, which is the same width as the upper panel 54 connected to the upper panel 54; and a second plate portion 551b of the same width, which is narrower than the first plate portion 551a and connected to the horizontal plate portion 552. An inclined plate portion 551c, which is formed at an angle that gradually narrows downwards from its side edges, is formed between the first plate portion 551a and the second plate portion 551b. A generally elongated rectangular hole 54a is formed approximately at the center of the portion of the connecting plate 551 where the first plate portion 551a of the same width connects to the upper panel 54 in the left-right direction. Furthermore, a generally elongated rectangular hole 551d is formed approximately at the center of the portion of the connecting plate 551 where the inclined plate portion 551c connects to the second plate portion 551b in the left-right direction. The plate-shaped adjusting member fixing portion 55 is elastic, and its elasticity is further enhanced by the holes 54a and 551d.

[0032] A first internal thread portion 551e for threaded engagement of a first threaded member 51 is provided on one side (specifically, the front side) of a pair of adjusting member fixing portions 55. Specifically, the first internal thread portion 551e is formed by flanging the front surface of the connecting plate 551 (inclined plate portion 551c) on one side (front side) and tapping its inner diameter portion. Furthermore, a first receiving portion 551f is provided on the other side (specifically, the rear side) of the pair of adjusting member fixing portions 55, where the front end of the first threaded member 51 abuts. Specifically, the first receiving portion 551f is formed by a concave recess from the inner surface (front surface) of the connecting plate 551 (inclined plate portion 551c) on the other side (rear side).

[0033] With regard to the pair of adjusting member fixing portions 55 thus formed, when screwed into the first threaded member 51, they move in a direction that widens the gap between them against the elastic force of the adjusting member fixing portions 55. When the first threaded member 51 is rotated in the loosening direction, the pair of adjusting member fixing portions 55 move in a direction that narrows the gap between them. In this way, the pair of adjusting member fixing portions 55 are respectively formed so that they can approach / move away from the end faces (rear end face 31a1, front end face 32a1) of each adjusting ring 30 through the first threaded member 51.

[0034] Each of the pair of engaging portions 57 has a generally trapezoidal connecting plate 571 that is connected to the short side of the upper panel 54 at approximately a right angle. The connecting plate 571 is wider than the short side of the upper panel 54. The connecting plate 571 is elastic at the connection portion with the upper panel 54.

[0035] A plate-shaped first abutment portion 572 protruding outward in the left-right direction (axial direction of the second threaded component 52) ​​is provided on the front and rear sides of the lower end of the connecting plate 571. That is, a first abutment portion 572 (a total of four) is provided at the four corners of the adjusting component fixing device 50. The first abutment portion 572 is formed to protrude from the connecting plate 571 in the width direction (front-back direction) and is inclined upward at an acute angle to the plate surface of the connecting plate 571. Moreover, a limiting abutment portion 572a bent upward at an approximately right angle is formed at the outer end of the first abutment portion 572 in the front-back direction (the front end in the first abutment portion 572 and the rear end in the first abutment portion 572). A cut portion 572b formed by a concave cut is formed on the edge of the first abutment portion 572 on the connecting plate 571 side.

[0036] A plate-shaped second abutment 573 is provided between a pair of first abutment portions 572 arranged front and rear. The second abutment portion 573 is inclined downward relative to the connecting plate 571. A cutout 573a is provided in the center of the second abutment portion 573.

[0037] Furthermore, as described above, a pair of engaging portions 57 are connected to the short side of the upper panel 54. Thus, each of the pair of engaging portions 57 (connecting plates 571) is elastic. The connecting plate 571 of one side (left side) of the pair of engaging portions 57 is provided with a second internal thread portion 571a that is threadedly engaged by a second threaded member 52. Specifically, the second internal thread portion 571a is formed by tapping a portion of the connecting plate 571 on one side (left side) of the engaging portion 57 that has been flanged towards its inner side. On the other hand, the connecting plate 571 of the other side (right side) of the pair of engaging portions 57 is provided with a second receiving portion 571b where the front end of the second threaded member 52 abuts. Specifically, the second receiving portion 571b is formed by a concave recess from the inner surface of the connecting plate 571 on the other side (right side). Furthermore, an arc-shaped hole 574 is formed near the upper side of the second internal thread portion 571a and the second receiving portion 571b of the connecting plate 571. Through the arc-shaped hole 574, portions of the second internal thread portion 571a and the second receiving portion 571b are elastic.

[0038] With regard to the pair of engaging portions 57 thus formed, when the second threaded member 52 is screwed in, the elastic force of the engaging portions 57 causes the pair of engaging portions 57 to expand. Moreover, when the second threaded member 52 is rotated in a loosening manner, the pair of engaging portions 57 shrinks. In other words, the pair of engaging portions 57 are formed to expand / shrink relative to the opposing edge 201 of the opening 20a1.

[0039] Next, use Figures 5-10 The method for fixing the adjusting ring 30 to the adjusting component fixing device 50 will be described. First, the pair of adjusting component fixing parts 55 and the pair of engaging parts 57 of the adjusting component fixing device 50 are set to a state where no elastic force is generated (the state in Figures 3(A) and 3(B)). At this time, the distance between the outer ends of the insertion claws 553 of the pair of adjusting component fixing parts 55 is D1 (refer to...). Figure 8 The distance between the connecting plates 571 of the pair of engaging parts 57 is W1 (see Figure 7(B)). Next, as... Figure 5 , Figure 6 As shown, the adjusting member fixing device 50 is configured relative to the opening 20a1 of the projection device 10, with reference to the engraving on the upper panel 54 of the adjusting member fixing device 50, such that the head side of the first threaded member 51 is in front and the head side of the second threaded member 52 is in the left side, as shown in FIG. 7(A). At this time, the front end of the second abutting portion 573 of the engaging portion 57 of one side of the adjusting member fixing device 50 is slid into the gap S2.

[0040] Here, as Figure 8As shown, the length between the front and rear limiting abutment portions 572a of the first abutment portion 572 and the front-rear length of the opening portion 20a1 (distance between the edges 204) is approximately the same. Therefore, the adjusting member fixing device 50 is easily positioned by being guided by the front and rear edges 204 of the opening portion 20a1 through the limiting abutment portions 572a. Furthermore, at this time, the partition plate 203 formed on the lower surface of the edge portion 201 is located at the cutout portion 573a of the second abutment portion 573, and the adjusting member fixing device 50 is positioned (see also...). Figure 2 Thus, as shown in FIG7(B), the adjusting component fixing device 50 is positioned such that the front ends of the second abutment portions 573 on both sides of the pair of engaging portions 57 enter the gap S2.

[0041] In addition, at this time, such as Figure 8 As shown, the pair of insertion claws 553 of the pair of adjustment component fixing parts 55 of the adjustment component fixing device 50 are located on the outer periphery of the small diameter portion 31b of the focus adjustment ring 31 and the gap S3 between the large diameter portion 31a of the focus adjustment ring 31 and the large diameter portion 32a of the zoom adjustment ring 32. Thus, the adjustment component fixing part 55A (the insertion claws 553 of the pair of adjustment component fixing parts 55) is configured to be inserted between the focus adjustment ring 31 and the zoom adjustment ring 32 in a first state where the width D1 is shorter than the gap S3, in order to insert into the gap S3. Then, according to the numbers engraved on the upper panel 54 of the adjustment component fixing device 50, when the second threaded part 52 is first screwed in, the pair of engaging parts 57 move in a direction that widens their distance from each other, and the distance between the connecting plates 571 increases from W1 (the state shown in FIG. 7(B)) to W2 (…). Figure 9 (as shown in the state) (W1 < W2). At this time, the lower surface of the first abutting part 572 abuts against the upper surface of the edge part 201, and the upper surface of the second abutting part 573 abuts against the front end face 202 of the edge part 201. In this way, the adjusting component fixing device 50 is fixed to the opening 20a1 of the housing 20 by a pair of engaging parts 57 of the main body fixing part 56. In other words, the adjusting component fixing device 50 is fixed relative to the lens barrel 80 by a pair of engaging parts 57 of the main body fixing part 56.

[0042] Then, when the first threaded member 51 is screwed into the upper panel 54 of the adjusting member fixing device 50 according to the number engraved on it, the pair of adjusting member fixing parts 55 move in a direction that widens the distance between them, and the distance between the outer ends of the insertion claw 553 increases from D1 ( Figure 8 The state shown expands to D2 ( Figure 10(D1 < D2). That is, the insertion claw 553 of the adjustment member fixing part 55A (a pair of adjustment member fixing parts 55) is in a second state with a width D2 that is approximately the same as the gap S3 in order to fix the adjustment ring 30. In one example, the width D2 in the second state is the same width as the gap S3. In this specification, the same width includes a width that has the same effect as when the width D2 and the gap S3 are the same width. The insertion claw 553 on the focus adjustment ring 31 side of the insertion claw 553 of the pair of adjustment member fixing parts 55 presses the rear end face 31a1 of the large diameter portion 31a of the focus adjustment ring 31 opposite to the insertion claw 553 forward in the optical axis LC direction. On the other hand, the insertion claw 553 on the zoom adjustment ring 32 side presses the front end face 32a1 of the large diameter portion 32a of the zoom adjustment ring 32 opposite to the insertion claw 553 backward in the optical axis LC direction. Thus, the pair of adjustment component fixing parts 55 are respectively configured to press the adjustment ring 30 along the optical axis LC direction. Furthermore, the insertion claw 553 of the adjustment component fixing part 55, which is formed in a plate shape and is elastic, engages with the front end face 32a1 of the large diameter portion 32a of the zoom adjustment ring 32 by pressing it into the gap S1. On the other hand, the insertion claw 553 of the adjustment component fixing part 55, which presses the rear end face 31a1 of the large diameter portion 31a of the focus adjustment ring 31, also engages by sinking into the rear end face 31a1. Thus, by means of the adjustment component fixing device 50, the adjustment ring 30 is pressed in the optical axis LC direction, thereby restricting its rotation and fixing it.

[0043] That is, the method for fixing the adjusting component (adjusting ring 30) has the following steps.

[0044] Preparation process: Set the width of the insertion claw 553 of the adjusting component fixing part 55 to D1 (first state), and set the width of the pair of engaging parts 57 to W1 ( Figure 5 , Figure 6 ).

[0045] Adjustment component fixing part insertion process (first process): After the front end of the second abutment part 573 of one locking part 57 slides into the gap S2 (Fig. 7(A)), the other locking part 57 is also inserted into the gap S2, so that the front ends of the second abutment parts 573 on both sides enter the gap S2 (Fig. 7(B)). The insertion claw part 553 of the adjustment component fixing part 55 is inserted into the gap S3 on the lens barrel 80 side. Figure 8 ).

[0046] Main body fixing process: Tighten the second threaded component 52 so that the width of the pair of engaging parts 57 becomes W2, and fix the adjusting component fixing device 50 to the opening 20a1 (the box 20 on the side of the lens barrel 80). Figure 9 ).

[0047] Adjustment component fixing process (second process): Tighten the first threaded component 51 so that the width of the insertion claw 553 of the adjustment component fixing part 55 changes from D1 to D2 (second state), becoming approximately the same width as the gap S3 of the adjustment ring 30 of the lens barrel 80. Figure 10 In one example, the width D2 of the insertion claw 553 can also be the same width as the gap S3. Thus, in this second state, by adjusting the insertion claw 553 of the component fixing part 55, the adjusting ring 30 is pressed in the optical axis LC direction.

[0048] Furthermore, if the first threaded component 51 is loosened, the insertion claws 553 of the pair of adjusting component fixing parts 55 move in the approaching direction and return. Figure 8 In this state, the fixing of the adjusting ring 30 by the pair of adjusting component fixing parts 55 is released. At this time, the adjusting component fixing device 50 is maintained fixed to the opening 20a1 of the housing 20 by the main body fixing part 56 (a pair of engaging parts 57). Therefore, with the adjusting component fixing device 50 fixed to the housing 20, the adjusting ring 30 can be rotated by finger to perform focus adjustment and zoom adjustment.

[0049] According to the above embodiment, the adjustment component fixing device 50 has an adjustment component fixing portion 55A, which has a first state in which the width D1 of the gap S3 on the side of the lens barrel 80 is shorter than the gap S3; and a second state in which the width D2 of the movable adjustment ring 30 provided on the side of the lens barrel 80 is approximately the same as the gap S3. Therefore, when fixing the adjustment ring 30, the lens barrel 80 is not pressed in a direction orthogonal to the optical axis LC, and thus, even if the adjustment ring 30 is fixed by the adjustment component fixing device 50, the optical axis offset of the optical axis LC of the lens barrel 80 can be reduced. Furthermore, in this embodiment, the adjustment components (focus adjustment ring 31, zoom adjustment ring 32) are formed in a semi-circular arc shape, but this is not a limitation; various forms of adjustment components such as rods can also be used.

[0050] Furthermore, the adjusting member fixing part 55A has a first threaded member 51 and a first receiving part 551f for the front end of the first threaded member 51 to abut. Thus, with a simple structure in which the first internal thread 551e is formed on only one side and the other side abuts against the first threaded member 51, the adjusting ring 30 can be fixed by simply rotating the threaded member.

[0051] Furthermore, the adjustment component fixing device 50 includes a main body fixing portion 56 for fixing to the side of the housing 20 that houses the lens barrel 80. This prevents the adjustment component fixing device 50 from shifting relative to the lens barrel 80, reducing the possibility of the adjustment ring 30 shifting even during transport. In this embodiment, the adjustment component fixing device 50 is fixed relative to the lens barrel 80 by a pair of engaging portions 57, but this is not a limitation; other structures can also be used for fixing.

[0052] Furthermore, the main body fixing part 56 has a second internal thread part 571a for threaded engagement with the second threaded member 52 and a second receiving part 571b for the front end of the second threaded member 52 to abut against. Thus, with a simple structure in which the second internal thread part 571a is formed on only one side and the other side abuts against the second threaded member 52, the adjusting member fixing device 50 can be fixed relative to the lens barrel 80 by simply rotating the threaded member.

[0053] Furthermore, the second threaded component 52 is positioned orthogonal to the first threaded component 51 when viewed from above. This allows for intuitive and easy installation of the adjusting component fixing device 50 onto the housing 20 and fixing of the adjusting ring 30.

[0054] Furthermore, the adjusting member fixing part 55 can be pressed in the optical axis LC direction to fix the adjusting ring 30 (focusing adjusting ring 31 and zoom adjusting ring 32). Therefore, when fixing the adjusting ring 30, the lens barrel 80 is not pressed in a direction orthogonal to the optical axis LC, thus reducing the optical axis offset of the lens barrel 80 even when the adjusting ring 30 is fixed by the adjusting member fixing device 50. In addition, in this embodiment, the adjusting members (focusing adjusting ring 31 and zoom adjusting ring 32) are formed in a semi-circular arc shape, but this is not a limitation; various forms of adjusting members, such as rods, can also be used.

[0055] Furthermore, the insertion claw 553 of the adjustment component fixing part 55 of the adjustment component fixing device 50 abuts against the end faces (rear end face 31a1, front end face 32a1) of the ring-shaped adjustment ring 30. This allows the adjustment ring 30 to be pressed in the LC direction along the optical axis with a simple structure.

[0056] Furthermore, the insertion claw 553 of the adjusting component fixing part 55 is configured to approach / separate from the adjusting ring 30 via the first threaded part 51. Thus, the state of fixing and releasing the adjusting ring 30 can be switched simply by turning the screw.

[0057] Furthermore, the adjusting component fixing part 55 is elastic. As a result, the adjusting ring 30 can be pressed more reliably in the optical axis LC direction.

[0058] Furthermore, the adjusting component fixing device 50 is fixed relative to the housing 20 containing the lens barrel 80 by the main body fixing part 56. Therefore, even when the adjusting ring 30 is pressed by the adjusting component fixing part 55, defects such as misalignment of the insertion claw 553 of the adjusting component fixing part 55 can be reduced. In addition, in this embodiment, the adjusting component fixing device 50 is fixed relative to the housing 20 by a pair of engaging parts 57, but it is not limited to this and can be fixed by other structures.

[0059] Furthermore, the main body fixing part 56 has a pair of engaging parts 57, which are used to fix the main body fixing part 56 to the opening 20a1 of the housing 20 opened for operating the adjusting ring 30 via the second threaded member 52. As a result, the structure of the main body fixing part 56 can be made simple by fixing through the opening 20a1, and the adjusting member fixing device 50 can be reliably fixed relative to the lens barrel 80.

[0060] Furthermore, in the second state described above, the adjusting member fixing part 55 presses the adjusting ring 30 in the LC direction along the optical axis. This allows the adjusting member fixing part 55 to be reliably positioned to fix the adjusting ring 30, thus providing a more reliable fixation of the adjusting ring 30.

[0061] Furthermore, by using the adjusting member fixing device 50 to fix the adjusting ring 30 of the projection device 10, the adjusting ring 30 can be fixed without shifting the optical axis LC of the lens barrel 80, thus enabling the projection device 10 to project a vivid image while fixing the adjusting ring 30.

[0062] Furthermore, the method for fixing the adjustment component includes: a first step, inserting the adjustment component fixing part 55 of the adjustment component fixing device 50, which is in a first state where the width D1 is shorter than the gap S3 on the lens barrel 80 side, into the gap S3; and a second step, setting the adjustment component fixing part 55 to a second state where the width is approximately the same as (identical to) the gap S3. This provides a method for fixing the adjustment component that reduces the LC offset of the optical axis of the lens barrel 80. Moreover, by including a step between the first and second steps where the adjustment component fixing device 50 is fixed to the housing 20 (i.e., the projection device 10) on the lens barrel 80 side via the main body fixing part 56, adjustment can be performed by releasing the fixing ring 30 while the adjustment component fixing device 50 is fixed to the projection device 10.

[0063] Furthermore, the embodiments described above are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included within the scope or spirit of the invention, and are included within the scope of the invention as described in the claims and its equivalents.

Claims

1. A device for fixing an adjusting component, characterized in that, Equipped with an adjustment component fixing part, The adjusting component fixing part has: a first state, for inserting into the gap between the rear end face of the large-diameter portion of the first adjusting component and the front end face of the large-diameter portion of the second adjusting component, and the width of the gap is shorter than the gap; and a second state, for fixing the movable adjusting components, namely the first adjusting component and the second adjusting component, which are disposed on the side of the lens barrel, and the width of the second adjusting component is the same as the gap. The adjusting component fixing part has: The first internal thread portion of the first threaded component is threadedly engaged; and The front end of the first threaded component abuts against the first receiving part.

2. The adjusting component fixing device according to claim 1, characterized in that, It has a main body fixing part for fixing to the side of the box housing the lens barrel.

3. The adjusting component fixing device according to claim 2, characterized in that, The main body fixing part has: The second internal thread portion of the second threaded component is threaded together; and The front end of the second threaded component abuts against the second receiving part.

4. The adjusting component fixing device according to claim 3, characterized in that, The second threaded component is positioned orthogonal to the first threaded component when viewed from above.

5. The adjusting component fixing device according to claim 1, characterized in that, The adjusting component fixing part can be pressed in the optical axis direction of the lens barrel to fix the adjusting component.

6. The adjusting component fixing device according to claim 5, characterized in that, The fixing part of the adjustment component abuts against the end face of the adjustment component, which is designed to be annular.

7. The adjusting component fixing device according to claim 6, characterized in that, The fixing part of the adjusting component is configured to be able to approach or separate from the end face of the adjusting component via the first threaded component.

8. The adjusting component fixing device according to any one of claims 5 to 7, characterized in that, The fixing part of the adjustment component is elastic.

9. The adjusting component fixing device according to claim 5, characterized in that, The adjusting component fixing device is fixed relative to the box housing the lens barrel by the main fixing part.

10. The adjusting component fixing device according to claim 9, characterized in that, The main body fixing part has a pair of engaging parts for fixing to the opening of the housing by a second threaded component, the opening being opened for operating the adjusting component.

11. The adjusting component fixing device according to claim 10, characterized in that, In the second state, the fixing part of the adjustment component presses the adjustment component in the direction of the optical axis.

12. A projection device, characterized in that, The adjusting component fixing device according to any one of claims 1 to 11 is installed.

13. A method of adjusting the fixation of a component, characterized in that have: In the first step, the adjusting component fixing part of the adjusting component fixing device according to claim 1, which has a width shorter than the gap on the lens barrel side, is inserted into the gap; as well as The second step involves fixing the adjusting component in a second state where the width of the fixing part of the adjusting component is the same as the gap.

14. The method for fixing the adjusting component according to claim 13, characterized in that, Between the first step and the second step, there is a step of fixing the adjusting component fixing device to the housing relative to the lens barrel side.

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