High visual field angle enlarging device

Abstract

To provide a high field of view expansion device capable of maintaining an appropriate viewing distance. 【Solution means】The high field of view expansion device is suitable for being placed on or clipped to a table surface and is used to obtain an enlarged image of an object on the distal side. The high field of view expansion device includes a support unit and a mirror holder unit. The mirror holder unit is installed on the support unit and constructs an optical path for obtaining an enlarged image on the distal side. The mirror holder unit includes a mirror holder, a rotation axis, and a magnifying glass holder. The mirror holder is installed on the support unit, is higher than the table surface, and has a mirror inclined with respect to the table surface. One end of the magnifying glass holder is installed on the rotation axis and can be inverted with respect to the mirror holder. The magnifying glass holder has a magnifying glass located above the object. The magnifying glass is used to enlarge an image, and the optical path is configured to project the light rays of the object onto the magnifying glass, reflect them from the magnifying glass to the mirror, and then reflect them from the mirror and project them outward.

Description

Technical Field

[0001] The present invention relates to an optical device, and particularly to a high field-of-view angle magnifying device capable of magnifying an image of an object.

Background Art

[0002] Conventional reading magnifying devices utilize the principle of lens magnification to magnify books and mobile phones so that even users with poor eyesight can easily view them.

[0003] For example, the mobile phone magnifying device disclosed in Chinese Utility Model No. CN209731365U includes a rectangular bottom plate, a support plate erected on the distal side of the bottom plate, and a magnifying glass erected on the proximal side of the bottom plate and spaced apart in parallel from the support plate. A user can lean the mobile phone against the support plate and magnify the screen of the mobile phone by viewing the mobile phone through the magnifying glass.

[0004] When viewing a mobile phone through the mobile phone magnifying device, a user can clearly see only when getting quite close to the magnifying glass, which makes it easy to tilt the head forward, causing pain in the shoulders and neck and even deterioration of the cervical vertebra.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] Therefore, an object of the present invention is to provide a high field-of-view angle magnifying device capable of maintaining an appropriate viewing distance.

Means for Solving the Problems

[0007] The high viewing angle magnification device of the present invention is suitable for being placed on or clipped to a table surface and is used to obtain a magnified image of an object on the distal side. The high viewing angle magnification device includes a support unit and a mirror holder unit.

[0008] The support unit is suitable for being placed on or clipped to the table surface. The mirror holder unit is installed above the support unit in the vertical direction and constructs an optical path for obtaining the magnified image on the distal side. The mirror holder unit includes a mirror holder, a rotation axis, and a magnifying glass holder. The mirror holder is installed on the support unit, has a mirror that is higher than the table surface and inclined with respect to the table surface. The rotation axis is installed at the upper end of the mirror holder and extends along a lateral direction perpendicular to the vertical direction. One end of the magnifying glass holder is installed on the rotation axis and can be inverted with respect to the mirror holder. The magnifying glass holder has a magnifying glass that is located above the object in the vertical direction. The magnifying glass is used to magnify an image, and the optical path is configured to guide the light rays of the object to be projected onto the magnifying glass, reflected by the magnifying glass and projected onto the mirror, and reflected by the mirror.

Advantages of the Invention

[0009] The advantages of the present invention are that the user can place the present invention on the table surface or clip it to the edge of the table surface, open the magnifying glass holder, and place the object below the magnifying glass holder. The user's line of sight can directly view the mirror holder, and the magnified image can be seen in the mirror. The magnified image is an equal magnification of the object and is located on the distal side (i.e., the mirror). Since the user can clearly see the magnified image between 30 and 50 cm, the user can use the present invention while maintaining an appropriate viewing distance.

Brief Description of the Drawings

[0010]

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Embodiments for Carrying Out the Invention

[0011] Referring to FIGS. 1 to 3, an embodiment of the high viewing angle magnification device 100 of the present invention is a desktop device, suitable for being placed on the table surface 91 or clipped to the edge of the table surface 91, and is used to obtain a magnified image 93 (see FIG. 5) of the object 92 on the distal side and let the user 94 view it. In this embodiment, the distal side is defined as a position away from the user 94 and the object 92. The high viewing angle magnification device 100 includes a support unit 2, a mirror holder unit 3, and a light source unit 4. When in use, the high viewing angle magnification device 100 is placed in front of the line of sight of the user 94.

[0012] The support unit 2 is suitable for being placed on the table surface 91 or clipped to the edge of the table surface 91. The support unit 2 of the present embodiment includes a base 21 placed on the table surface 91 and a support rod 22 extending upward along the vertical direction Z from the base 21. The base 21 extends along the front-rear direction X perpendicular to the vertical direction Z. The support rod 22 has a lower end 221 fixed to the base 21 and an upper end 222 opposite to the lower end 221. The upper surface of the upper end 222 in this embodiment is an inclined surface.

[0013] The mirror holder unit 3 is installed above the support rod 22 of the support unit 2 in the vertical direction Z and is used to construct an optical path P for obtaining the enlarged image 93 on the distal side. In some embodiments, the support rod 22 can be an elevating rod body, whereby the height of the mirror holder unit 3 can be adjusted. The mirror holder unit 3 includes a mirror holder 31, a rotation axis 32, and a magnifying glass holder 33.

[0014] The mirror holder 31 is installed at the upper end 222 of the support rod 22 in the vertical direction Z, and has a lower shell 311 installed at the upper end 222 and a mirror 312 that is higher than the table surface 91 and fixed to the lower shell 311 and faces the user 94. The lower shell 311 has a lower edge 313 adjacent to the base 21. The mirror 312 is inclined with respect to the vertical direction, and the lower end of the mirror 312 is further directed toward the user 94 with respect to the upper end of the mirror 312. The mirror 312 is, that is, on the distal side described above.

[0015] Referring to FIGS. 3 and 4, the mirror 312 is inclined at an inclination angle A1 with respect to the table surface 91. When the inclination angle A1 is between 30° and 80°, the center of the mirror 312 can be approximately aligned with the line of sight of the user 94, and the user 94 can directly view the mirror 312 without raising or lowering the head, which is more ergonomic. The mirror 312 in this embodiment is a free-form concave mirror and has the function of magnifying an image. However, in other embodiments, the mirror 312 may be a spherical concave mirror, or since it is not necessarily required to magnify the image, the mirror 312 may be a plane mirror. Also, the contour of the mirror 312 is generally composed of four boundary lines, and the upper boundary line 321a of the mirror 312 is longer than the lower boundary line 321b. In a specific embodiment, the mirror 312 is in the shape of a trapezoid with a wider upper part and a narrower bottom, which can avoid the problem of glare caused by the user 94 seeing the ceiling through the mirror 312, but it is not limited thereto.

[0016] Referring to FIGS. 1 to 3, the rotation shaft 32 is installed at the upper end of the mirror holder 31, and the rotation shaft 32 extends along the lateral direction Y (i.e., the left-right direction) perpendicular to the vertical direction Z and the front-back direction X.

[0017] One end of the magnifying glass holder 33 is installed on the rotation shaft 32 and can be inverted with respect to the mirror holder 31. The magnifying glass holder 33 has an upper shell 331 connected to the rotation shaft 32 and a magnifying glass 332 fixed to the upper shell 331 for magnifying an image. The upper shell 331 has a side edge 333 away from the rotation shaft 32. The magnifying glass 332 is located above the object 92 in the vertical direction Z. The magnifying glass 332 in this embodiment is a free-form concave mirror, and its area is larger than the area of the mirror 312. However, in other embodiments, the magnifying glass 332 may be another form of concave mirror that also has the function of magnifying an image.

[0018] Referring to FIGS. 4 and 5, the optical path P of the present invention guides the light rays of the object 92 to be projected onto the magnifying lens 332, reflected by the magnifying lens 332 and projected onto the reflecting mirror 312, and the magnified image 93 is reflected by the reflecting mirror 312. Therefore, the user 94 can directly view the reflecting mirror 312 (i.e., the distal side) while maintaining an appropriate viewing distance, and can clearly view the magnified image 93.

[0019] Also, regarding the optical path P, the magnifying lens 332 is configured not to receive direct light rays from the lower shell 311. In other words, the light rays of the lower shell 311 itself do not enter the light receiving range of the optical path P of the magnifying lens 332. The so-called not receiving all or partially means that even if a part of the lower shell 311 is located below the magnifying lens 332, when the viewer's eye 94 directly views the reflecting mirror 312 and views the object 92 actually arranged below the magnifying lens 332, based on the configuration of this combined optical path, the magnifying lens 332 does not directly receive the light rays projected from the lower shell 311 towards the magnifying lens 332, or the magnifying lens 332 can receive only a small part of the image from the lower shell 311, but most of the magnified image 93 is from the object 92.

[0020] The magnifying lens 332 of one of the embodiments has the effect of curving the image downward, and the reflecting mirror 312 has the effect of curving the image upward. Therefore, the two free-curvature concave mirrors of the magnifying lens 332 and the reflecting mirror 312 can offset the curvature distortion of imaging with each other, and obtain the magnified image 93 without curvature at the same ratio as the object 92.

[0021] The reflecting mirror 312 and the magnifying lens 332 form an angle A2. The angle A2 in this embodiment is 49 degrees. However, if the angle A2 is between 40 and 60 degrees, a better imaging effect can be obtained.

[0022] In addition, the side 334 of the magnifying glass 332 and the upper surface of the object 92 are separated by a distance d in the vertical direction Z. In this embodiment, the distance d is 50 cm. If the distance d is too large, the image will be out of focus. If the distance d is too small, it will obstruct the line of sight of the user 94. Therefore, it is more appropriate that the distance d is in the range of 40 to 60 cm.

[0023] Based on the numerical ranges of the angle A2 and the distance d, the free-form surface parameters of the reflecting mirror 312 and the magnifying glass 332 can be calculated. Since the object 92 passes through the optical path P and its image is enlarged and presented on the reflecting mirror 312 (i.e., the distal side), the user 94 can easily read the object 92 at an appropriate viewing distance of 30 to 50 cm. If the user 94 is too close to the present invention, the enlarged image 93 will be enlarged too much and difficult for the user 94 to see. If the user 94 is too far from the present invention, the magnification ratio of the enlarged image 93 will be too small and it will be difficult to see clearly. Therefore, the user 94 can use the present invention while maintaining an appropriate viewing distance and obtain a better viewing angle and reading comfort.

[0024] Referring to FIGS. 1, 2, and 6, the rotation axis 32 includes a first pivot portion 321 formed on one side of the lower shell 311, a second pivot portion 322 formed on one side of the upper shell 331 and rotatable with respect to the first pivot portion 321, and a rotation knob 323. Specifically, the second pivot portion 322 is composed of two pivot plates spaced apart in the lateral direction Y. The rotation axis 32 further includes two caps 324 respectively fixed to the outside of the pivot plates. By rotating the rotation knob 323, the angle A2 can be adjusted and fixed.

[0025] Referring to FIGS. 1 and 7, the magnifying glass holder 33 can pivot between an open state (see FIG. 1) and a closed state (see FIG. 7) with respect to the reflecting mirror holder 31.

[0026] Referring to FIGS. 1 and 2, when the magnifying glass holder 33 is in the open state, the magnifying glass holder 33 is opened in a substantially horizontal state, and the side edge 333 of the magnifying glass holder 33 is slightly lower than the rotation axis 32 and higher than the lower edge 313 of the mirror holder 31.

[0027] Referring to FIGS. 7 and 8, when the magnifying glass holder 33 is in the closed state, the magnifying glass holder 33 is covered on the mirror holder 31, and the side edge 333 of the magnifying glass holder 33 is lower than the lower edge 313 of the mirror holder 31. As can be seen from FIG. 8, the length of the magnifying glass holder 33 is greater than the length of the mirror holder 31.

[0028] Referring to FIGS. 2, 4, and 6, the light source unit 4 is used to provide a supplementary light effect to the light rays entering the optical path P. The light source unit 4 of the present embodiment is an LED lamp and is installed at the lower edge 313 of the lower shell 311. However, in other embodiments, the light source unit 4 may be a light source installed at other positions, or may be replaced with a conventional lighting fixture in the home, as long as it can provide sufficient light to the mirror holder unit 3.

[0029] Referring to FIG. 9, further, the mirror holder unit 3 of the present embodiment further includes an imaging unit 34. The imaging unit 34 has a lens 341 that is attached to the rotation axis 32 and is attached within the rotation axis 32 so that a user 94 (see FIG. 4) can take an image. Thereby, the effects of monitoring and recording can be obtained, and the situation during the use period of the user 94 can be understood. In some embodiments, the position of the imaging unit 34 can be changed or omitted.

[0030] Referring to FIG. 6, the mirror holder 31 of the present embodiment further has two insertion holes 314 formed on the back surface of the lower shell 311. The insertion holes 314 are used to externally attach a power cable and supply power to the imaging unit 34 and the light source unit 4. In other embodiments, the high viewing angle magnifying device 100 of the present invention may incorporate a battery to supply power.

[0031] Referring to FIG. 10, this is a modification of the present embodiment. The differences are as follows. The support rod 22 of the support unit 2 is plate-shaped and extends obliquely upward from the edge of the base 21 and in the direction of the user 94 (see FIG. 4). The upper end 222 of the support rod 22 extends obliquely along the back surface of the lower shell 311 and away from the user 94.

[0032] A counterweight (not shown) is provided inside the base 21 to maintain the center of gravity.

[0033] The mirror holder 31 further has a slide groove 315 formed on the back surface of the lower shell 311.

[0034] The upper end 222 of the support rod 22 is slidably attached to the mirror holder 31. The support rod 22 has an adjustment member 223 rotatably joined between the upper end 222 and the slide groove 315. After loosening the adjustment member 223, the mirror holder unit 3 can be moved up and down in the vertical direction Z with respect to the support unit 2 to change the height of the mirror holder unit 3. The adjustment member 223 may be a rotating knob or other member that can be tightened or loosened.

[0035] The high visual field angle enlarging device 100 of the present invention can be directly placed on the table surface 91 or the base 21 can be designed in a clip type and clipped to the edge of the table surface 91 for use. The user 94 can open the magnifying glass holder 33 to an open state, place the object 92 below the magnifying glass holder 33, horizontally directly view the mirror holder 31 with the line of sight, and view the enlarged image 93 at the mirror 312 (i.e., the distal side). The user 94 can use the present invention while maintaining an appropriate viewing distance of 30 to 50 cm, and can further have a better visual field angle and reading comfort. Furthermore, since the magnifying glass holder 33 is horizontal, it can prevent the user 94 from approaching the present invention too closely, so that an appropriate viewing distance can be maintained and the object of the present invention can be surely achieved.

[0036] The above is only an embodiment of the present invention and does not limit the scope of implementation of the present invention. Therefore, any equivalent changes and modifications made based on the scope of the claims of this patent and the content of the specification all belong to the scope of the present invention.

Explanation of Reference Numerals

[0037] 100 High visual field angle enlarging device 2 Support unit 21 Base 22 Support rod 221 Lower end 222 Upper end 223 Adjusting member 3 Mirror holder unit 31 Mirror holder 311 Lower shell 312 Mirror 313 Lower edge 314 Insertion hole 315 Slide groove 32 Rotation axis 321 First pivot part 321a Upper boundary line 321b Lower boundary line 322 Second pivot part 323 Rotation knob 324 Cap 33 Magnifying Glass Holder 331 Upper Shell 332 Magnifying Glass 333 Side Edge 334 Side 34 Imaging Unit 341 Lens 4 Light Source Unit 91 Table Surface 92 Object 93 Enlarged Image 94 User A1 Tilt Angle A2 Angle d Distance P Optical Path X Front - Back Direction Y Lateral Direction Z Up - Down Direction

Claims

1. A wide field of view magnifying device suitable for being placed on or clipped to a tabletop and used for obtaining an enlarged image of an object on the distal side, the wide field of view magnifying device comprising: a support unit suitable for being placed on or clipped to the tabletop; a mirror holder unit installed above the support unit in the vertical direction and constructing an optical path for obtaining the enlarged image on the distal side; The mirror holder unit comprises: a mirror holder installed on the support unit, having a reflecting mirror higher than the tabletop and inclined with respect to the tabletop; a rotating shaft installed at the upper end of the mirror holder and extending along a lateral direction perpendicular to the vertical direction; a magnifying glass holder having one end installed on the rotating shaft and capable of inverting with respect to the mirror holder, having a magnifying glass located above the object in the vertical direction, the magnifying glass being used for magnifying an image, the optical path being configured to guide light rays of the object to be projected onto the magnifying glass, reflected by the magnifying glass and projected onto the reflecting mirror, and reflected by the reflecting mirror; A wide field of view magnifying device including the above.

2. The wide field of view magnifying device according to Claim 1, further comprising a light source unit for providing light rays in the optical path.

3. The wide field of view magnifying device according to Claim 2, wherein the mirror holder further has a lower shell for installing the reflecting mirror, and the light source unit is installed at the lower edge of the lower shell.

4. The wide field of view magnifying device according to Claim 1, wherein the mirror holder further has a lower shell for installing the reflecting mirror, the magnifying glass holder further has an upper shell for installing the magnifying glass, the rotating shaft has a first pivot portion formed on one side of the lower shell, and has a second pivot portion formed on one side of the upper shell and rotatable with respect to the first pivot portion.

5. The wide field of view magnifying device according to Claim 1, wherein the mirror holder further has a lower shell for installing the reflecting mirror, and the magnifying glass is configured not to receive or partially receive direct light rays from the lower shell.

6. The wide field of view magnifying device according to Claim 1, wherein the mirror holder unit further comprises an imaging unit having a lens.

7. The magnifying glass holder further has a side edge that is away from the rotation axis and lower than the rotation axis, and can rotate between an open state and a closed state with respect to the mirror holder. When in the open state, the magnifying glass holder is lower than the rotation axis and higher than the lower edge of the mirror holder. When in the closed state, the magnifying glass holder is covered with the mirror holder, and the side edge of the magnifying glass holder is lower than the lower edge of the mirror holder. The high visual field angle magnifying device according to claim 1.

8. The magnifying glass or the mirror is a free-form surface concave mirror. The high visual field angle magnifying device according to claim 1.

9. The area of the mirror is smaller than the area of the magnifying glass. The high visual field angle magnifying device according to claim 1.

10. The upper boundary line of the mirror is longer than the lower boundary line. The high visual field angle magnifying device according to claim 1.

11. The support unit includes a base for placing on the table surface and a support rod extending upward along the vertical direction from the base. The support rod has a lower end fixed to the base and an upper end opposite to the lower end for installing the mirror holder. The high visual field angle magnifying device according to claim 1.

12. The mirror and the magnifying glass form an angle of 40 to 60 degrees. The high visual field angle magnifying device according to claim 1.

13. The side of the magnifying glass and the upper surface of the object are separated by a distance of 40 to 60 cm in the vertical direction. The high visual field angle magnifying device according to claim 1.

14. The support unit has an adjustment member adjustably attached to the mirror holder, and the mirror holder unit can move up and down in the vertical direction with respect to the support unit. The high visual field angle magnifying device according to claim 1.

Images