JP7187907B2 - Holding part for optical system part and manufacturing method thereof - Google Patents

Description

The present invention relates to a holding member for an optical system component and a manufacturing method thereof.

There is a helmet mount display as a display device worn on the head of a human body. For example, in the helmet-mounted display described in Patent Document 1, light emitted from the image display device is guided to a visor provided in front of the helmet through an optical system provided inside the helmet. A virtual image is thereby formed on the visor.

Japanese Patent Application Laid-Open No. 2007-193070

The optical system described above is composed of a plurality of optical system components including lenses and mirrors. These optical system components must be positioned with high accuracy in order to accurately guide the light emitted from the image display device to the visor. A holding component is used to hold one or more optical components. The holding component has a positioning portion for positioning the optical system component. In order to position the optical system components with high accuracy, it is necessary to set a small tolerance range for the dimensions of the positioning portion of the holding component.

However, it is difficult to manufacture holding parts having positioning portions that satisfy a small tolerance range in a short period of time.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a holding part that can position an optical system part with high precision and that can be easily manufactured, and a method for manufacturing the same.

(1) A holding component for an optical system component according to a first aspect of the present invention is a holding component that holds a plurality of optical system components each having an arcuate positioned portion and each having an optical axis, wherein the plurality of optical systems a holding body portion having an opening capable of accommodating the component and having an inner peripheral surface surrounding the plurality of optical system components in a state in which the plurality of optical system components are accommodated in the opening ; a positioning portion, and a plurality of support surfaces for respectively supporting a plurality of optical system members are formed on the inner peripheral surface of the holding main body so as to be arranged at intervals in the axial direction of the holding main body. the positioning portion includes a concave positioning surface corresponding to the arc of the positioned portion of the optical system component to be positioned by the positioning portion, and at least a portion of the positioning surface is formed so as to be able to contact the positioned portion; The plurality of positioning portions are formed on the plurality of support surfaces, respectively, and the plurality of optical system components are accommodated in the openings while being supported by the plurality of support surfaces. The positioning surfaces of the plurality of positioning portions protrude toward the plurality of positions to be positioned of the plurality of optical system components, and the positioning surfaces of the plurality of positioning portions are positioned on the positions to be positioned of the plurality of optical system components so that the optical axes of the plurality of optical system components are aligned with each other. The holding body portion and the plurality of positioning portions are provided on the holding body portion so as to be able to contact each other, and the holding body portion and the plurality of positioning portions are integrally formed moldings, and the positioning surfaces of the plurality of positioning portions are parallel to the optical axes of the plurality of optical system components. , and other portions of the inner peripheral surfaces of the plurality of holding body portions are formed to have draft angles that are inclined with respect to the optical axes of the plurality of optical system components.

In the above holding component, at least part of the concave positioning surface contacts the arcuate positioned portion of the optical system component. Thereby, the optical system component is positioned within the opening of the holding body. According to the shape of the positioning surface as described above, even if the dimensions of each part of the positioning surface deviate from the design values due to manufacturing errors, there is a high possibility that the dimensions of any part of the positioning surface will be within the tolerance range. Therefore, even if the tolerance range is set small, it is possible to easily form the positioning portion that satisfies the tolerance range. Therefore, it is possible to easily manufacture a holding component capable of positioning an optical system component with high accuracy.

In the holding component described above, at least a portion of the positioning surface may be formed within the tolerance range, and dimensional accuracy is not required such that all portions of the positioning surface are within the tolerance range. Therefore, it is possible to shorten the time required for determining the molding conditions when producing the above molded product. Also, in this case, a mold for producing a molded product does not require high dimensional accuracy. Therefore, the holding part can be manufactured more easily.
According to the above configuration, when at least part of the positioning surface abuts on the portion to be positioned of the optical system component, the distance from the positioning surface to the optical axis of the optical system component is less likely to vary. Therefore, the optical axis of the optical system component is easily and accurately adjusted so as to pass through the predetermined position within the opening of the holding body.
The holding main body is configured to accommodate a plurality of optical system components in the opening, and is provided with a plurality of positioning portions. It is provided on the holding main body so as to protrude toward each of the positions to be positioned of the optical system components, and can abut on the positions to be positioned of the plurality of optical system components so that the optical axes of the plurality of optical system components are aligned with each other. be. In this case, the plurality of positioning portions abut on the plurality of positioned portions of the plurality of optical system components, respectively, so that the optical axes of the plurality of optical system components are easily adjusted to match each other.

(2) The portion to be positioned of each optical system component has an arc shape centered on the optical axis, and each positioning portion is arranged so that the optical axis of the optical system component corresponding to the positioning portion is positioned within the opening of the holding body portion. It may be possible to abut against the positioned portion of the optical system component so as to pass through a predetermined position.

In this case, the optical axis of the optical system component is adjusted so as to pass through a predetermined position within the opening of the holding main body by at least part of the positioning surface coming into contact with the positioned portion of the optical system component.

( 3 ) Each optical system component has an outer peripheral portion including a positioned portion and a supported portion, the positioned portion has a dimensional accuracy equal to or higher than a predetermined dimensional accuracy, and the supported portion has a The holding component supports the supported portion of each optical system component so that each positioning portion contacts the positioned portion of the optical system component corresponding to the positioning portion. A support may be further provided.

According to the above configuration, the supported portion of the optical system component does not have high dimensional accuracy. Even in such a case, since the portion to be positioned has dimensional accuracy equal to or higher than the predetermined dimensional accuracy, the positioning portion abuts against the portion to be positioned, thereby positioning the optical system component with high accuracy. In addition, the supported portion is supported by the supporting portion, so that the optical system component is accurately held at a predetermined position in the holding component.

( 4 ) A method of manufacturing a holding component for an optical system component according to a second aspect of the present invention is a method of manufacturing a holding component that holds a plurality of optical system components each having an arc-shaped positioned portion and each having an optical axis. a holding main body portion having an opening capable of accommodating a plurality of optical system components and having an inner peripheral surface surrounding the plurality of optical system components in a state in which the plurality of optical system components are accommodated in the opening; The step of manufacturing includes a step of manufacturing a holding part including a plurality of positioning portions provided in the holding body so as to be arranged on the inner peripheral surface of the holding body at intervals in the axial direction of the holding body. forming a plurality of supporting surfaces for respectively supporting a plurality of optical system members; and each positioning portion includes a concave positioning surface corresponding to the arc of the positioned portion of the optical system component to be positioned by the positioning portion. forming a positioning portion so that at least a part of the positioning surface can abut against a portion to be positioned; forming a plurality of positioning portions on a plurality of supporting surfaces; and a plurality of optical systems; In a state in which the components are accommodated in the opening while being supported by the plurality of supporting surfaces, the plurality of optical system components protrude from the plurality of portions of the inner peripheral surface toward the plurality of positions to be positioned of the plurality of optical system components. providing a plurality of positioning portions in the holding body portion so that the positioning surfaces of the plurality of positioning portions can abut against the positioned portions of the plurality of optical system components so that the optical axes of the system components are aligned with each other; The positioning surfaces of the plurality of positioning portions are parallel to the optical axis of the optical system component in a state in which the plurality of positioned portions of the optical system component are in contact with at least a portion of the positioning surfaces of the plurality of positioning portions. and a plurality of positioned portions of the plurality of optical system components are in contact with at least a portion of the positioning surfaces of the plurality of positioning portions, and the other portions of the inner peripheral surface of the holding main body portion are formed in a plurality of positions. Forming the holding main body so as to have a draft inclined with respect to the optical axis of the optical system part, and manufacturing a molded product integrally formed with the holding main body and a plurality of positioning parts as the holding part including.

In the holding component manufactured by the manufacturing method described above, at least part of the concave positioning surface contacts the arc-shaped portion to be positioned of the optical system component. Thereby, the optical system component is positioned within the opening of the holding body. According to the shape of the positioning surface as described above, even if the dimensions of each part of the positioning surface deviate from the design values due to manufacturing errors, there is a high possibility that the dimensions of any part of the positioning surface will be within the tolerance range. Therefore, even if the tolerance range is set small, it is possible to easily form the positioning portion that satisfies the tolerance range. Therefore, it is possible to easily manufacture a holding component capable of positioning an optical system component with high precision.

In the holding component to be manufactured, at least a part of the positioning surface needs to be formed within the tolerance range, and the dimensional accuracy is not required such that the entire positioning surface is within the tolerance range. Therefore, it is possible to shorten the time required for determining the molding conditions when producing the above molded product. Also, in this case, a mold for producing a molded product does not require high dimensional accuracy. Therefore, the holding part can be manufactured more easily.

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to position an optical system component with high precision, and manufacture of a holding component becomes easy.

1 is an external perspective view showing an example of a helmet-mounted display; FIG. 2 is a diagram showing a holding member included in the first optical system device of FIG. 1; FIG. FIG. 3 is a schematic diagram showing a state in which a plurality of lenses are sequentially attached to the holding member of FIG. 2; (a) is an enlarged plan view enlarging a positioning portion surrounded by a dashed line in FIG. 2 (a), and (b) is a perspective view of the positioning portion shown in (a). FIG. 5 is an enlarged plan view showing an example in which the dimensions of each portion of the positioning surface of FIG. 4(a) deviate from design values; FIG. 5 is a schematic diagram showing the flow of resin inside the mold when the positioning portion of FIG. 4 is molded; It is a figure which shows an example of the holding member which concerns on a comparative example. 8 is an enlarged plan view showing an example in which the dimensions of each portion of the positioning surface of FIG. 7(b) deviate from design values; FIG. FIG. 8 is a schematic diagram showing the flow of resin inside the mold when the positioning portion of FIG. 7 is molded;

A holding component for an optical system component and a manufacturing method thereof according to an embodiment of the present invention will be described with reference to the drawings. A holding component for an optical system component is used, for example, in an image display device that is worn on the head of a human body. Such image display devices include a helmet mount display, a head mount display, and the like.

[1] Helmet Mount Display FIG. 1 is an external perspective view showing an example of a helmet mount display. The helmet mount display 1 of FIG. 1 includes a pair of left and right image display devices 10a and 10b corresponding to the right and left eyes of a human body, a pair of left and right first optical devices 20a and 20b, and a pair of left and right second optical devices. 30a, 30b and visor 40 are provided. The visor 40 is shown in dashed lines in FIG.

The right image display device 10a emits light forming an image to be viewed by the user's right eye. The right first and second optical system devices 20 a and 30 a guide the light emitted from the right image display device 10 a to the visor 40 . The left image display device 10b emits light forming an image to be viewed by the user's left eye. The left first and second optical system devices 20 b and 30 b guide the light emitted from the left image display device 10 b to the visor 40 . By guiding the light emitted from the left and right image display devices 10a and 10b to the visor 40, the left and right images are respectively formed on the portions of the visor 40 facing the left and right eyes of the user.

Depending on the shape of the visor 40, the image display devices 10a and 10b corresponding to the left and right eyes of the user may be configured with the left and right reversed.

In the above configuration, each of the first optical system devices 20a and 20b is composed of a plurality of optical system components and holding components that hold them, and the focus and aberration of the light emitted from the image display devices 10a and 10b. to adjust. A plurality of optical system components provided in the first optical system devices 20a and 20b are a plurality of lenses for adjusting the focus and aberration of light emitted from the image display devices 10a and 10b.

Each of the second optical system devices 30a and 30b is composed of a plurality of optical system components and holding components that hold them. A plurality of optical system components provided in the second optical system devices 30 a and 30 b are a plurality of mirrors that guide the light that has passed through the first optical system devices 20 a and 20 b to the visor 40 .

In the first optical system 20a, 20b, the lenses must be precisely positioned so that a high quality image is formed on the visor 40. FIG. Therefore, a holding member according to an embodiment of the present invention is used for the first optical system devices 20a and 20b. The holding member holds the plurality of lenses while positioning them. Details of the holding parts used in the first optical system devices 20a and 20b of FIG. 1 will be described below.

[2] Holding member The first optical system devices 20a and 20b in FIG. 1 have the same configuration. FIG. 2 is a diagram showing holding members provided in the first optical system devices 20a and 20b of FIG. 3 is a schematic diagram showing a state in which a plurality of lenses are sequentially attached to the holding member 100 of FIG. 2. As shown in FIG.

In FIG. 2, (a) is a plan view of the holding member 100, (b) is a cross-sectional view taken along line AA of FIG. 2(a), and (c) is a cross-sectional view taken along line BB of FIG. 2(a). It is a diagram. The holding member 100 according to the present embodiment is a molded product obtained by injection molding of a resin material, and has a hollow truncated cone shape as shown in FIGS. . The inner peripheral surface of the holding member 100 gradually increases in diameter from one end to the other end in the axial direction of the holding member 100 .

A plurality of (three in this example) stepped portions S1, S2, and S3 are formed on the inner peripheral surface of the holding member 100 so as to be aligned in the axial direction of the holding member 100 at intervals. Each of the stepped portions S1, S2, S3 has support surfaces 11, 12, 13 formed in a substantially annular or substantially arcuate shape so as to surround the axial center of the holding member 100. As shown in FIG.

Further, a plurality of positioning portions pp and a plurality of support portions sp are provided on each of the stepped portions S1, S2, and S3. The plurality of positioning portions pp and the plurality of support portions sp protrude inwardly of the holding member 100 from the inner peripheral surface of the holding member 100 on the support surfaces 11, 12, and 13 of the stepped portions S1, S2, and S3. is formed to

The stepped portion S1 is located near the portion with the smallest diameter of the holding member 100, the stepped portion S3 is located near the portion with the largest diameter of the holding member 100, and the stepped portion S2 is located between the stepped portions S1 and S3. located in between. The step portion S1 is provided with two positioning portions pp and three support portions sp. The stepped portion S2 is provided with two positioning portions pp and four support portions sp. The step portion S3 is provided with two positioning portions pp and four support portions sp.

As shown in FIG. 3A, the lens L1 is accommodated in the opening inside the stepped portion S1. In order to reduce the weight of the lens L1, the lens L1 has a shape in which a part of the outer peripheral portion is cut out from a disk-shaped lens. Therefore, an arc portion extending in an arc shape and a plurality of linear portions extending in a straight line are formed in the outer peripheral portion of the lens L1. In general, a lens is manufactured with high dimensional accuracy so that the distance from the outer periphery of the lens to the optical axis is constant. Therefore, the arc portion of the lens L1 has a predetermined positional relationship with respect to its optical axis La1. On the other hand, the positional relationship of the plurality of linear portions of the lens L1 with respect to the optical axis La1 is unknown depending on the accuracy of notch processing.

In this embodiment, the arc portion of the lens L1 corresponds to a portion to be positioned having a dimensional accuracy equal to or higher than a predetermined dimensional accuracy. On the other hand, a plurality of linear portions of the lens L1 correspond to supported portions with low dimensional accuracy.

The lens L1 is supported on the support surface 11 while being accommodated in the opening of the stepped portion S1. Also, two positioning portions pp formed on the support surface 11 come into contact with the arc portion of the outer peripheral portion of the lens L1. Thereby, the lens L1 is positioned such that the optical axis La1 of the lens L1 passes through a predetermined position inside the holding member 100. FIG. Furthermore, three support portions sp formed on the support surface 11 contact or come close to a plurality of linear portions of the outer peripheral portion of the lens L1.

As indicated by the dotted line in FIG. 3A, at least part of the gap between the outer peripheral portion of the lens L1 and the inner peripheral surface of the holding member 100 is filled with an adhesive. Thereby, the lens L1 is fixed while being positioned by the two positioning portions pp and supported by the support surface 11 and the three support portions sp. Note that the entire gap between the outer peripheral portion of the lens L1 and the inner peripheral surface of the holding member 100 may be filled with the adhesive.

As in the example of housing the lens L1 in the stepped portion S1, as shown in FIGS. 3B and 3C, the lens L2 is housed in the opening inside the stepped portion S2, contains the lens L3. Like the lens L1, the lenses L2 and L3 have a shape in which a part of the outer peripheral portion of the disc-shaped lens is notched. In the lenses L2 and L3, similarly to the example of the lens L1, the arc portions correspond to the portions to be positioned, and the plurality of linear portions correspond to the portions to be supported.

The lens L2 is supported on the support surface 12 while being accommodated in the opening of the stepped portion S2. Also, two positioning portions pp formed on the support surface 12 come into contact with the arc portion of the outer peripheral portion of the lens L2. Furthermore, four support portions sp formed on the support surface 12 contact or come close to a plurality of linear portions of the outer peripheral portion of the lens L2. As indicated by the dotted line in FIG. 3B, at least part of the gap between the outer peripheral portion of the lens L2 and the inner peripheral surface of the holding member 100 is filled with an adhesive. Thereby, the lens L2 is fixed while being positioned by the two positioning portions pp and supported by the support surface 12 and the four support portions sp.

The lens L3 is supported on the support surface 13 while being accommodated in the opening of the stepped portion S3. Also, two positioning portions pp formed on the support surface 13 come into contact with the arc portion of the outer peripheral portion of the lens L3. Furthermore, four support portions sp formed on the support surface 13 contact or come close to a plurality of linear portions of the outer peripheral portion of the lens L3. As indicated by the dotted line in FIG. 3C, at least part of the gap between the outer peripheral portion of the lens L3 and the inner peripheral surface of the holding member 100 is filled with an adhesive. Thereby, the lens L3 is fixed while being positioned by the two positioning portions pp and supported by the support surface 13 and the four support portions sp.

By positioning the plurality of lenses L1, L2, and L3 respectively, the lenses L1, L2, and L3 pass through predetermined positions within the holding member 100, as shown in FIGS. 2(b) and 2(c). are aligned with each other.

[3] Shape and Effect of Positioning Portion pp of Holding Member 100 The plurality of positioning portions pp provided on the stepped portions S1, S2, and S3 basically have the same shape. Therefore, the shape of one positioning portion pp provided at the stepped portion S3 in FIG. 2A will be described as a representative of the shapes of the plurality of positioning portions pp provided at the stepped portions S1, S2, and S3.

4(a) is an enlarged plan view of the positioning portion pp surrounded by the dashed line in FIG. 2(a), and FIG. 4(b) is a perspective view of the positioning portion pp shown in FIG. 4(a). be. As indicated by thick solid lines in FIG. 4(a) and hatched in FIG. 4(b), the positioning portion pp has a concave positioning surface ps corresponding to the arc portion of the lens L3 with which the positioning portion pp abuts. have

More specifically, the positioning surface ps in FIGS. 4A and 4B is formed concavely toward the inside of the holding member 100 . Also, the positioning surface ps in FIGS. 4A and 4B forms a portion of a cylindrical surface having a curvature equal to or within the error range of the curvature of the arc portion of the lens L3 in FIG. is formed in

According to the positioning surface ps, even if the dimensions of each part of the positioning surface ps deviate from the design values due to manufacturing errors that occur when the holding member 100 is molded, the dimensions of any part of the positioning surface ps are within the tolerance range. likely to become

FIG. 5 is an enlarged plan view showing an example in which the dimensions of each part of the positioning surface ps shown in FIG. 4(a) deviate from the designed values. In FIG. 5, the appearance shape of the positioning portion pp according to the design value is indicated by a dashed line. A dotted line indicates a tolerance range AL with respect to the design value.

In the positioning portion pp in FIG. 5, most of the positioning surface ps is located outside the tolerance range AL, as indicated by the thick solid line. However, part of the positioning surface ps lies within the tolerance range AL. Therefore, the innermost portion p1 of the positioning surface ps within the tolerance range AL abuts against the lens L3, thereby positioning the lens L3 with the same accuracy as when the positioning surface ps is formed according to the design values. be. In this case, even if the tolerance range AL is set small, the positioning portion pp that satisfies the tolerance range AL can be easily formed.

As described above, in order to position the lens L3 with high accuracy, at least a part of the positioning surface ps should be within the tolerance range AL and the entire positioning surface ps should not be located inside the tolerance range AL. formed. The positioning surface ps does not necessarily have to be formed so that the overall dimensions are within the tolerance range AL. Therefore, in order to manufacture the holding member 100, it is not necessary to calculate strict molding conditions for preventing the occurrence of dimensional errors. Moreover, since high dimensional accuracy is not required for the mold used for molding, the mold can be easily manufactured. As a result, the time required to manufacture the holding member 100 is shortened, and the manufacturing of the holding member 100 is facilitated.

Moreover, when manufacturing the holding member 100 by injection molding, it is required to reduce the load applied to the mold because the mold is used repeatedly over a long period of time. FIG. 6 is a schematic diagram showing the flow of resin inside the mold when the positioning portion pp of FIG. 4 is molded. In FIG. 6, a cross section of a mold 500 perpendicular to the axis of the holding member 100 and corresponding to the cross section including the positioning surface ps in FIG. shown.

In the positioning portion pp of FIG. 4, the shape of the positioning surface ps for positioning the lens L3 and its peripheral portion changes relatively gently. Accordingly, during injection molding, the resin supplied to the flow path 510 in the mold 500 flows relatively smoothly through the flow path 510 as indicated by a plurality of arrows in FIG. As a result, it is possible to reduce the supply pressure of the resin supplied into the flow path 510 during injection molding, thereby reducing the load applied to the mold 500 . Therefore, the life of the mold used for manufacturing the holding member 100 can be extended.

In each positioning portion pp, as shown in FIG. 2(c), each positioning surface ps is positioned relative to the optical axes La1, La2, and La3 of the lenses L1, L2, and L3 positioned within the holding member 100. formed in parallel. That is, in the holding member 100, the positioning surface ps is not provided with a draft angle. In this case, when at least part of the positioning surface ps abuts on the lenses L1, L2, and L3, the distances from the positioning surface ps to the optical axes La1, La2, and La3 of the lenses L1, L2, and L3 are less likely to vary. . Therefore, the optical axes La1, La2, and La3 of the lenses L1, L2, and L3 are easily and accurately adjusted so as to pass through predetermined positions on the holding member 100. FIG.

If the positioning surface ps of the positioning portion pp is not provided with a draft angle, it is desirable that the portion of the inner peripheral surface of the holding member 100 excluding the positioning portion pp is provided with a draft angle. Thereby, the releasability at the time of manufacturing the holding member 100 is ensured. In this case, the support portion sp may or may not have a draft angle.

[4] Comparative Example FIG. 7 is a diagram showing an example of a holding member according to a comparative example. A holding member 100X in FIG. 7 has the same configuration as the holding member 100 in FIG. 2 except that the shape of the positioning portion rp is different. In FIG. 7, (a) is a plan view of the holding member 100X, (b) is an enlarged plan view enlarging the positioning portion rp surrounded by the dashed line in FIG. 7 (a), and (c) is a plan view of FIG. It is a perspective view of the positioning part rp shown by (a).

As indicated by thick solid lines in FIG. 7B and hatched in FIG. have.

According to the positioning portion rp of this comparative example, the lens L3 is positioned within the holding member 100X by the arc portion of the lens L3 coming into contact with the vertex of each positioning surface ps facing inward of the holding member 100X.

In such a configuration, on the positioning surface ps of each positioning portion rp, a vertex portion tp to be brought into contact with the lens L3 is determined in advance. Therefore, if the dimension of the apex portion tp of the positioning surface ps falls outside the tolerance range due to a manufacturing error that occurs when the holding member 100X is molded, the lens L3 will be high even if the dimensions of other portions of the positioning surface ps are within the tolerance range. There is a high possibility that positioning cannot be performed with accuracy.

FIG. 8 is an enlarged plan view showing an example in which the dimensions of each portion of the positioning surface ps shown in FIG. 7(b) deviate from the designed values. In FIG. 8, the appearance shape of the positioning portion rp according to the design value is indicated by a dashed line. A dotted line indicates a tolerance range AL with respect to the design value.

In the positioning portion rp in FIG. 8, a portion of the positioning surface ps is positioned within the tolerance range AL as indicated by the thick solid line. However, the vertex portion tp of the positioning surface ps lies outside the tolerance range AL. In this case, the vertex portion tp does not come into contact with the lens L3 within the tolerance range AL of the positioning surface ps. The vertex portion tp abuts the lens L3 outside the tolerance range AL. Therefore, the lens L3 cannot be positioned within the tolerance range AL.

Moreover, when manufacturing the holding member 100X according to the present comparative example, an excessive load is likely to be applied to the mold used for injection molding. FIG. 9 is a schematic diagram showing the flow of resin inside the mold when the positioning portion pp of FIG. 7 is molded. In FIG. 9, a cross section of a mold 500X corresponding to a cross section perpendicular to the axis of the holding member 100X and including the positioning surface ps in FIG. shown.

In the positioning portion pp of FIG. 7, the change in the shape of the positioning surface ps for positioning the lens L3 and its peripheral portion is relatively large compared to the example of the positioning portion pp of FIG. As a result, during injection molding, as indicated by a plurality of arrows in FIG. 9, the resin supplied to the channel 510X inside the mold 500X tends to stay in the channel 510X. Therefore, it is necessary to increase the supply pressure of the resin supplied into the flow path 510X during injection molding. In this case, the load applied to the mold 500X increases. Therefore, the life of the mold 500X cannot be expected to be extended.

Further, in the positioning portion pp of FIG. 7, since the shape of the positioning surface ps and its peripheral portion changes relatively greatly as described above, it is difficult to control the temperature of each portion during molding of the holding member 100 . For example, if the cooling rate between the surface and the inside of the molded product is non-uniform, a portion where the thickness increases or decreases locally occurs. Therefore, it is not easy to form the holding member 100X with high dimensional accuracy.

[5] Effects of the Embodiment As described above, in the holding member 100 according to the embodiment of the present invention, at least a portion of the concave positioning surface ps contacts the arc portions of the lenses L1, L2, and L3. . Thereby, the lenses L1, L2, L3 are positioned within the stepped portions S1, S2, S3 of the holding member 100. As shown in FIG. According to the shape of the concave positioning surface ps of each positioning part pp, even when the tolerance range AL is set small, the positioning part pp that satisfies the tolerance range AL can be easily formed. Therefore, it is possible to easily manufacture the holding member 100 capable of positioning the lenses L1, L2, and L3 with high precision.

[6] Other Embodiments (a) In the above embodiment, the holding member 100 is configured to hold three lenses L1, L2, and L3 as a plurality of optical system components. The number of optical system components held is not limited to the above example. The holding member 100 may be configured to hold only one optical system component, or may be configured to hold two or four or more optical system components.

(b) In the above embodiment, the holding member 100 is configured to hold a plurality of lenses L1, L2, L3 as a plurality of optical system components, but the present invention is not limited to this. The holding member 100 may be configured to hold one or more optical system components such as mirrors or prisms. In this case, it becomes possible to use the holding member 100 for the second optical system devices 30a and 30b in FIG.

(c) In the above embodiment, the holding member 100 is made of a resin material, but the holding member 100 may be made of a metal material. Moreover, although the holding member 100 is produced by injection molding in the above embodiment, the holding member 100 may be produced by machining.

(d) In the above embodiment, the lenses L1, L2, and L3 held by the holding member 100 each have an arc portion as the portion to be positioned, but the present invention is not limited to this. Each of the lenses L1, L2, and L3 may have an elliptical arc portion as a portion to be positioned. In this case, the positioning portion pp of the holding member 100 may have a concave positioning surface ps corresponding to the elliptical arc portions of the lenses L1, L2, and L3.

(e) In the above embodiment, the holding member 100 has a hollow truncated conical shape, but the present invention is not limited to this. The holding member 100 may have a cylindrical shape, a square tubular shape, or an elliptical tubular shape.

(f) In the above embodiment, the lenses L1, L2, and L3 held by the holding member 100 are provided with notches, but the present invention is not limited to this. The lenses L1, L2, and L3 held by the holding member 100 may not have cutouts.

(g) In the above embodiment, the holding member 100 is used for the helmet-mounted display 1, but the present invention is not limited to this. The holding member 100 having the positioning portion pp as described above can also be used for other electronic devices including one or more optical system components.

[7] Correspondence between each constituent element of the claim and each part of the embodiment Hereinafter, an example of correspondence between each constituent element of the claim and each part of the embodiment will be described. Not limited.

In the above embodiment, the lenses L1, L2, and L3 are examples of the optical system components, and the portion of the holding member 100 excluding the positioning portion pp and the support portion sp is an example of the holding main body.

Various other elements having the structure or function described in the claims can be used as each component of the claims.
[8] Reference form
(1) A holding component for an optical system component according to the first embodiment is a holding component for holding an optical system component having an arc-shaped portion to be positioned, and is a holding body having an opening capable of accommodating the optical system component. and a positioning portion provided in the holding body portion so as to protrude toward the portion to be positioned when the optical system component is accommodated in the opening, and the positioning portion corresponds to the arc shape of the portion to be positioned. A concave positioning surface is included, and at least a part of the positioning surface is formed so as to be able to come into contact with the portion to be positioned.
In the above holding component, at least part of the concave positioning surface contacts the arcuate positioned portion of the optical system component. Thereby, the optical system component is positioned within the opening of the holding body. According to the shape of the positioning surface as described above, even if the dimensions of each part of the positioning surface deviate from the design values due to manufacturing errors, there is a high possibility that the dimensions of any part of the positioning surface will be within the tolerance range. Therefore, even if the tolerance range is set small, it is possible to easily form the positioning portion that satisfies the tolerance range. Therefore, it is possible to easily manufacture a holding component capable of positioning an optical system component with high accuracy.
(2) The holding body portion and the positioning portion may be molded integrally.
In the holding component described above, at least a portion of the positioning surface may be formed within the tolerance range, and dimensional accuracy is not required such that all portions of the positioning surface are within the tolerance range. Therefore, it is possible to shorten the time required for determining the molding conditions when producing the above molded product. Also, in this case, a mold for producing a molded product does not require high dimensional accuracy. Therefore, the holding part can be manufactured more easily.
(3) The optical system component has an optical axis, the portion to be positioned has an arcuate shape centered on the optical axis, and the positioning portion is configured such that the optical axis of the optical system component is predetermined within the opening of the holding main body. It may be possible to abut against the positioned portion of the optical system component so as to pass through the positioned position.
In this case, the optical axis of the optical system component is adjusted so as to pass through a predetermined position within the opening of the holding main body by at least part of the positioning surface coming into contact with the positioned portion of the optical system component.
(4) The positioning surface of the positioning portion may be formed parallel to the optical axis of the optical system component.
In this case, when at least part of the positioning surface abuts on the portion to be positioned of the optical system component, the distance from the positioning surface to the optical axis of the optical system component is less likely to vary. Therefore, the optical axis of the optical system component is easily and accurately adjusted so as to pass through the predetermined position within the opening of the holding body.
(5) The holding main body is configured to accommodate a plurality of optical system components in the opening, and has a plurality of positioning portions. Provided on the holding body so as to protrude toward the positions to be positioned of the plurality of optical system components, and contact the positions to be positioned of the plurality of optical system components so that the optical axes of the plurality of optical system components are aligned with each other. may be accessible.
In this case, the plurality of positioning portions abut on the plurality of positioned portions of the plurality of optical system components, respectively, so that the optical axes of the plurality of optical system components are easily adjusted to match each other.
(6) The optical system component has an outer peripheral portion including a positioned portion and a supported portion, the positioned portion has a dimensional accuracy equal to or higher than a predetermined dimensional accuracy, and the supported portion is the positioned portion. The holding component may further include a supporting portion that supports the supported portion such that the positioning portion contacts the positioned portion.
According to the above configuration, the supported portion of the optical system component does not have high dimensional accuracy. Even in such a case, since the portion to be positioned has dimensional accuracy equal to or higher than the predetermined dimensional accuracy, the positioning portion abuts against the portion to be positioned, thereby positioning the optical system component with high accuracy. In addition, the supported portion is supported by the supporting portion, so that the optical system component is accurately held at a predetermined position in the holding component.
(7) A method for manufacturing a holding component for an optical system component according to the second embodiment is a method for manufacturing a holding component for holding an optical system component having an arc-shaped portion to be positioned, and is capable of accommodating the optical system component. a step of producing a holding part including a holding main body having an opening and a positioning part provided in the holding main body so as to protrude toward the positioned part in a state where the optical system component is housed in the opening; forming the positioning portion such that the positioning portion includes a concave positioning surface corresponding to the arc of the portion to be positioned, and at least a portion of the positioning surface can contact the portion to be positioned; include.
In the holding component manufactured by the manufacturing method described above, at least part of the concave positioning surface contacts the arc-shaped portion to be positioned of the optical system component. Thereby, the optical system component is positioned within the opening of the holding body. According to the shape of the positioning surface as described above, even if the dimensions of each part of the positioning surface deviate from the design values due to manufacturing errors, there is a high possibility that the dimensions of any part of the positioning surface will be within the tolerance range. Therefore, even if the tolerance range is set small, it is possible to easily form the positioning portion that satisfies the tolerance range. Therefore, it is possible to easily manufacture a holding component capable of positioning an optical system component with high accuracy.
(8) The step of manufacturing may include a step of manufacturing a molded product in which the holding body portion and the positioning portion are integrally formed as the holding component.
In the holding component to be manufactured, at least a portion of the positioning surface may be formed within the tolerance range, and dimensional accuracy is not required such that the entire positioning surface is within the tolerance range. Therefore, it is possible to shorten the time required for determining the molding conditions when producing the above molded product. Also, in this case, a mold for producing a molded product does not require high dimensional accuracy. Therefore, the holding part can be manufactured more easily.

Reference Signs List 1 Helmet mount display 10a, 10b Image display device 11, 12, 13 Support surface 20a, 20b First optical system device 30a, 30b Second optical system device 40 Visor 100 , 100X... Holding member 500, 500X... Mold, 510, 510X... Flow path, AL... Tolerance range, L1, L2, L3... Lens, La1, La2, La3... Optical axis, S1, S2, S3... Step portion , p1... portion, pp, rp... positioning portion, ps... positioning surface, sp... support portion, tp... vertex portion

Claims (4)

A holding component for holding a plurality of optical system components each having an arcuate positioned portion and each having an optical axis,
a holding main body having an opening capable of accommodating the plurality of optical system components and having an inner peripheral surface surrounding the plurality of optical system components in a state in which the plurality of optical system components are accommodated in the opening;
a plurality of positioning portions provided on the holding main body,
A plurality of support surfaces for respectively supporting the plurality of optical system members are formed on the inner peripheral surface of the holding main body so as to be spaced apart from each other in the axial direction of the holding main body,
Each positioning portion includes a concave positioning surface corresponding to the arc of the positioned portion of the optical system component to be positioned by the positioning portion, and at least a portion of the positioning surface can contact the positioned portion. formed,
The plurality of positioning parts are
each formed on a plurality of support surfaces,
In a state in which the plurality of optical system components are accommodated in the opening while being supported by the plurality of support surfaces, the plurality of positions of the plurality of optical system components are positioned from a plurality of portions of the inner peripheral surface. so that the positioning surfaces of the plurality of positioning portions can contact the portions to be positioned of the plurality of optical system components so that the optical axes of the plurality of optical system components are aligned with each other. provided in the holding body,
The holding main body and the plurality of positioning portions are integrally formed molded products,
The positioning surfaces of the plurality of positioning portions are formed parallel to the optical axes of the plurality of optical system components,
A holding component for an optical system component, wherein the other portion of the inner peripheral surfaces of the plurality of holding body portions is formed to have a draft inclined with respect to the optical axis of the plurality of optical system components. The portion to be positioned of each optical system component has an arc shape centered on the optical axis,
Each positioning portion can contact the portion to be positioned of the optical system component such that the optical axis of the optical system component corresponding to the positioning portion passes through a predetermined position within the opening of the holding body portion. 2. The holding component for an optical system component according to claim 1, wherein: each optical system component has an outer peripheral portion including the positioned portion and the supported portion;
The portion to be positioned has a dimensional accuracy equal to or higher than a predetermined dimensional accuracy, the portion to be supported has a dimensional accuracy lower than the dimensional accuracy of the portion to be positioned,
2. The holding component further comprises a supporting portion for supporting the supported portion of each optical system component such that each positioning portion contacts the positioned portion of the optical system component corresponding to the positioning portion. 3. A holding component for optical system components according to 2 above. A method for manufacturing a holding component for holding a plurality of optical system components each having an arcuate positioned portion and each having an optical axis, comprising:
a holding main body having an opening capable of accommodating the plurality of optical system components and having an inner peripheral surface surrounding the plurality of optical system components with the plurality of optical system components accommodated in the opening ; fabricating the holding component including a plurality of positioning portions provided on the holding body;
The creating step includes:
Forming a plurality of support surfaces on the inner peripheral surface of the holding main body so as to be arranged at intervals in the axial direction of the holding main body, the supporting surfaces respectively supporting the plurality of optical system members;
Each positioning portion includes a concave positioning surface corresponding to the arc of the positioned portion of the optical system component to be positioned by the positioning portion, and at least a portion of the positioning surface can abut on the positioned portion. forming the positioning portion so as to
respectively forming the plurality of positioning portions on a plurality of support surfaces;
In a state in which the plurality of optical system components are accommodated in the opening while being supported by the plurality of support surfaces, the plurality of positions of the plurality of optical system components are positioned from a plurality of portions of the inner peripheral surface. so that the positioning surfaces of the plurality of positioning portions can contact the portions to be positioned of the plurality of optical system components so that the optical axes of the plurality of optical system components are aligned with each other. providing a plurality of positioning portions on the holding body;
The positioning surfaces of the plurality of positioning portions contact the optical axis of the optical system component in a state in which the plurality of positioned portions of the plurality of optical system components are in contact with at least a portion of the positioning surfaces of the plurality of positioning portions. Forming the plurality of positioning portions so as to be parallel to
With the plurality of positioned portions of the plurality of optical system components in contact with at least a portion of the positioning surfaces of the plurality of positioning portions , other portions of the inner peripheral surface of the holding main body portion are aligned with the plurality of positioning portions. forming the holding body portion so as to have a draft inclined with respect to the optical axis of the optical system component;
A method of manufacturing a holding component for an optical system component, comprising: producing a molded product in which the holding body portion and the plurality of positioning portions are integrally formed as the holding component.

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