Camera housing and lighting device

Abstract

To improve a technique related to a camera for reading optical information.SOLUTION: The camera housing 1 includes the base member 100 having the inner wall portion 102 and the outer wall portion 103 that protrude to the object side with respect to the seating surface 101 to which the lens barrel is attached and form concentric circles centered on the attachment position P of the lens barrel, the annular light source 110 provided between the inner wall portion 102 and the outer wall portion 103, the annular optical member 120 disposed on the object-side end surfaces of the inner wall portion 102 and the outer wall portion 103, and the cylindrical first fixing member 130 screwed to the inner peripheral surface of the inner wall portion 102. The lens barrel includes a first fixing member 130 having a first pressing part 131 projecting radially outward at least at a part of the circumference of an object-side end, and a second fixing member 140 which is a cylindrical second fixing member 140 screwed with the outer peripheral surface of the outer wall part 103 and has a second pressing part 141 projecting radially inward at least at a part of the circumference of the object-side end.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a camera housing and a lighting device. [Background technology]

[0002] Conventionally, there are known cameras that read optical information such as two-dimensional codes or three-dimensional codes. For example, Patent Document 1 discloses a ring-shaped external illumination unit that can be applied to a barcode reader. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-64551 Summary of the Invention [Problem to be solved by the invention]

[0004] Prior art discloses a configuration in which the light from an LED for illumination is contained within the field of view of a barcode reader by using a ring-shaped Fresnel lens placed in the light-transmitting portion of an external lighting unit. However, the appropriate illumination range of the illumination light can vary depending on the environment in which the camera is used, such as the performance of the lens barrel attached to the camera and the positional relationship with the subject. For this reason, an external lighting unit with a uniform optical configuration, such as the focal length of the Fresnel lens, may not necessarily be able to accommodate various usage environments.

[0005] In view of the above circumstances, an object of the present disclosure is to improve technology relating to cameras that read optical information. [Means for solving the problem]

[0006] A camera housing according to an embodiment of the present disclosure includes: a base member having inner and outer wall portions that protrude toward an object side relative to a seating surface on which a lens barrel is attached and that form concentric circles centered on the attachment position of the lens barrel; an annular light source provided between the inner wall portion and the outer wall portion; an annular optical member disposed on an object-side end surface of the inner wall portion and the outer wall portion; a cylindrical first fixing member that is screwed onto an inner circumferential surface of the inner wall portion, the first fixing member having a first pressing portion that protrudes radially outward from at least a portion of a circumference of an object side end portion; a cylindrical second fixing member that is screwed onto an outer peripheral surface of the outer wall portion, the second fixing member having a second pressing portion that protrudes radially inward from at least a portion of the circumference of an object side end portion; Equipped with The first fixing member and the second fixing member are configured to press the optical element from the object side toward the object-side end faces of the inner wall portion and the outer wall portion, respectively, using the first pressing portion and the second pressing portion when screwed into the inner wall portion and the outer wall portion, respectively.

[0007] An illumination device according to an embodiment of the present disclosure includes: A lighting device that is detachable from a camera, a base member having inner and outer wall portions that protrude toward an object side relative to a seating surface on which a lens barrel is attached and that form concentric circles centered on the attachment position of the lens barrel; an annular light source provided between the inner wall portion and the outer wall portion; an annular optical member disposed on an object-side end surface of the inner wall portion and the outer wall portion; a cylindrical first fixing member that is screwed onto an inner circumferential surface of the inner wall portion, the first fixing member having a first pressing portion that protrudes radially outward from at least a portion of a circumference of an object side end portion; a cylindrical second fixing member that is screwed onto an outer peripheral surface of the outer wall portion, the second fixing member having a second pressing portion that protrudes radially inward from at least a portion of the circumference of an object side end portion; Equipped with The first fixing member and the second fixing member are configured to press the optical element from the object side toward the object-side end faces of the inner wall portion and the outer wall portion, respectively, using the first pressing portion and the second pressing portion when screwed into the inner wall portion and the outer wall portion, respectively. [Effects of the Invention]

[0008] According to one embodiment of the present disclosure, technology relating to cameras that read optical information is improved. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a camera housing according to an embodiment of the present disclosure. [Figure 2] 2A and 2B are a front view and a side view of the camera housing. [Figure 3] 2 is a perspective view showing a cross section taken along line AA of a first portion of the camera housing according to the first embodiment. FIG. [Figure 4] FIG. 10 is a perspective view showing a cross section taken along line AA of a first portion of a camera housing according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present disclosure will be described.

[0011] (Outline of the embodiment) A camera housing 1 according to an embodiment of the present disclosure will be described with reference to FIG. 1. FIG. 1 is a perspective view of the camera housing 1. The camera housing 1 can be used to read optical information from an object, such as a two-dimensional code or a three-dimensional code. The camera housing 1 is configured so that a lens barrel can be attached and detached to, for example, an attachment position P shown in FIG. 1. Specifically, the camera housing 1 may be capable of attaching any lens barrel that conforms to a predetermined screw standard, such as a C-mount. The camera housing 1 also includes a circular light Q centered at the attachment position P, which can irradiate illumination light onto an object during photography.

[0012] 2 is a front view (left side in the figure) and a right side view (right side in the figure) of the camera housing 1. As shown in FIG. 2, for ease of explanation, in this embodiment, the camera housing 1 will be described divided into a first section 10 and a second section 20. In summary, the first section 10 is a section that is provided with a seating surface to which a lens barrel is attached and an annular light source, etc., as will be described later, and is located on the object side relative to the second section 20. The second section 20 is a section that houses, for example, an imaging element, a power supply, etc., and is located on the image side relative to the first section 10.

[0013] Next, the structure of the camera housing 1 according to this embodiment will be described in detail with reference to Fig. 3. Fig. 3 is a perspective view of the AA cross section of the first part 10 of the camera housing 1 according to this embodiment. As shown in Fig. 3, the camera housing 1 includes a base member 100, a light source 110, an optical member 120, a first fixing member 130, and a second fixing member 140.

[0014] Base member 100 has inner wall portion 102 and outer wall portion 103 that protrude toward the object side relative to seat surface 101 on which the lens barrel is attached, and that form concentric circles centered on lens barrel attachment position P. Base member 100 may be made of any material, such as resin or metal.

[0015] The light source 110 is an annular light source device provided between the inner wall portion 102 and the outer wall portion 103. In this embodiment, the light source 110 has a plurality of LED elements arranged in an annular shape, but the configuration of the light source 110 is not limited to this example. For example, when the optical member 120 includes a light guide plate as described below, the light source 110 may have one LED element.

[0016] The optical element 120 is an annular optical element disposed in contact with the object-side end surfaces of the inner wall portion 102 and the outer wall portion 103. In this embodiment, the optical element 120 includes an annular Fresnel lens that refracts the light irradiated from the light source 110, an annular diffusion plate that diffuses the light irradiated from the light source 110, an annular light guide plate that guides the light irradiated from the light source 110, or a combination thereof; however, the configuration of the optical element 120 is not limited to this example. For example, the optical element 120 may include an annular cover that transmits the light irradiated from the light source 110. The above-described annular light Q corresponds to the combination of the light source 110 and the optical element 120.

[0017] The first fixing member 130 is a cylindrical member that screws into the inner circumferential surface of the inner wall portion 102. The first fixing member 130 has a first pressing portion 131 that protrudes radially outward from the outer circumferential surface along at least a portion of the circumference of the object-side end portion. In this embodiment, the first pressing portion 131 protrudes radially outward from the outer circumferential surface along the entire circumference of the object-side end portion of the first fixing member 130. When the first fixing member 130 is screwed into the inner wall portion 102 of the base member 100, the first pressing portion 131 presses the optical element 120 from the object side toward the object-side end surface of the inner wall portion 102. Furthermore, the outer diameter of the first fixing member 130 (i.e., the length from the optical axis to the outer circumferential surface of the first fixing member 130) is approximately equal to the inner diameter of the optical element 120 described above (i.e., the length from the optical axis to the inner circumferential surface of the optical element 120).

[0018] The second fixing member 140 is a cylindrical member that screws into the outer peripheral surface of the outer wall portion 103. The second fixing member 140 has second pressing portions 141 that protrude radially inward from the inner peripheral surface along at least a portion of the circumference of the object-side end portion. In this embodiment, the second pressing portions 141 protrude radially inward from the inner peripheral surface along the entire circumference of the object-side end portion of the second fixing member 140. When the second fixing member 140 is screwed into the outer wall portion 103 of the base member 100, the second pressing portions 141 press the optical element 120 from the object side toward the object-side end surface of the outer wall portion 103. The inner diameter of the second fixing member 140 (i.e., the length from the optical axis to the inner peripheral surface of the second fixing member 140) is approximately equal to the outer diameter of the optical element 120 described above (i.e., the length from the optical axis to the outer peripheral surface of the optical element 120).

[0019] According to the above-described configuration of camera housing 1, first fixing member 130 and second fixing member 140, while screwed into inner wall portion 102 and outer wall portion 103 of base member 100, respectively, press optical member 120 from the object side toward base member 100, thereby fixing the position of optical member 120 in the optical axis direction of camera housing 1. Furthermore, since the outer diameter of first fixing member 130 and the inner diameter of optical member 120 are approximately the same, and the inner diameter of second fixing member 140 and the outer diameter of optical member 120 are approximately the same, the position of optical member 120 in the horizontal direction perpendicular to the optical axis of camera housing 1 is fixed.

[0020] Furthermore, the optical member 120 can be replaced by removing the first fixing member 130 and the second fixing member 140 from the inner wall portion 102 and the outer wall portion 103 of the base member 100, respectively. The optical characteristics required of the optical member 120 can vary depending on the usage environment of the camera housing 1, and according to this embodiment, for example, a plurality of optical members 120 with different optical characteristics can be prepared in advance, and the optical member 120 can be easily replaced with an optical member 120 that suits the usage environment of the camera housing 1. Therefore, the technology related to cameras that read optical information is improved in that the camera housing 1 can be adapted to various usage environments.

[0021] Although the present disclosure has been described based on the drawings and examples, it should be noted that those skilled in the art may make various modifications and alterations based on the present disclosure. Therefore, it should be noted that these modifications and alterations are included in the scope of the present disclosure. For example, the functions included in each component can be rearranged so as not to cause logical inconsistencies, and multiple components can be combined or divided into one.

[0022] Furthermore, in the above-described embodiment, an example has been described in which the optical member 120 is disposed in contact with the object-side end surfaces of the inner wall portion 102 and the outer wall portion 103 of the base member 100. However, the configuration of the camera housing 1 according to the present disclosure is not limited to this example. For example, FIG. 4 is a perspective view of the AA cross section of the first portion 10 in the camera housing 1 according to the second embodiment of the present disclosure. As shown in FIG. 4, the camera housing 1 according to the second embodiment further includes a first sealing member 150 and a second sealing member 160.

[0023] The first sealing member 150 is an annular sealing member provided between the optical member 120 and the inner wall portion 102 of the base member 100. The first sealing member 150 is compressed by screwing the inner wall portion 102 and the first fixing member 130 together. For example, a rubber O-ring can be used as the first sealing member 150, but the first sealing member 150 is not limited to this example.

[0024] The second sealing member 160 is an annular sealing member provided between the optical member 120 and the outer wall portion 103 of the base member 100. The second sealing member 160 is compressed by screwing the outer wall portion 103 and the second fixing member 140 together. For example, a rubber O-ring can be used as the second sealing member 160, but the second sealing member 160 is not limited to this example.

[0025] According to the above-described configuration of the camera housing 1 of the second embodiment, the first sealing member 150 and the second sealing member 160 are compressed between the optical member 120 and the inner wall portion 102 and the outer wall portion 103, respectively, in a state in which the first fixing member 130 and the second fixing member 140 are screwed into the inner wall portion 102 and the outer wall portion 103 of the base member 100, thereby sealing the gap between the optical member 120 and the inner wall portion 102 and the outer wall portion 103. This configuration can prevent liquid, dust, etc. from entering from the outside into the space in which the light source 120 is disposed (i.e., the space defined by the inner wall portion 102 and the outer wall portion 103 of the base member 100 and the optical member 120).

[0026] In the second embodiment, the first sealing member 150 may be provided between the optical member 120 and the first pressing portion 131 of the first fixing member 130. Similarly, the second sealing member 160 may be provided between the optical member 120 and the second pressing portion 141 of the second fixing member 140. Even with this configuration, it is possible to prevent liquid, dust, or the like from entering from the outside into the space in which the light source 110 is disposed.

[0027] In the above-described embodiment, an example has been described in which the camera housing 1 has the first section 10 and the second section 20. However, an embodiment in which the first section 10 and the second section 20 are configured as separate bodies is also possible. For example, the second section 20 may be configured as the camera body, and the first section 10 may be configured as a lighting device that is detachable from the camera body. [Explanation of symbols]

[0028] 1 camera housing 10 Part 1 20 Part 2 100 Base member 101 Seat 102 Inner wall 103 Exterior wall 110 Light source 120 Optical Components 130 First fixing member 131 First holding part 140 Second fixing member 141 Second holding part 150 First sealing member 160 Second sealing member

Claims

1. A camera housing, a base member having inner and outer wall portions that protrude toward an object side relative to a seating surface on which a lens barrel is attached and that form concentric circles centered on the attachment position of the lens barrel; an annular light source provided between the inner wall portion and the outer wall portion; an annular optical member disposed on an object-side end surface of the inner wall portion and the outer wall portion; a cylindrical first fixing member that is threadedly engaged with an inner circumferential surface of the inner wall portion, the first fixing member having a first pressing portion that protrudes radially outward from at least a portion of a circumference of an object side end portion; a cylindrical second fixing member that is screwed onto an outer peripheral surface of the outer wall portion, the second fixing member having a second pressing portion that protrudes radially inward from at least a portion of a circumference of an object side end portion; Equipped with the first fixing member and the second fixing member are configured to be screwed into the inner wall portion and the outer wall portion, respectively, and to press the optical element from the object side toward the object side end surfaces of the inner wall portion and the outer wall portion by the first pressing portion and the second pressing portion.

2. The camera housing according to claim 1, The camera housing is configured so that the optical member can be replaced by removing the first fixing member and the second fixing member from the inner wall portion and the outer wall portion, respectively.

3. The camera housing according to claim 1, The optical member has an annular Fresnel lens that refracts the light emitted from the light source and / or an annular diffusion plate that diffuses the light.

4. The camera housing according to claim 1, a first sealing member having an annular shape, the first sealing member being provided between the optical member and the inner wall portion or the first fixing member and being compressed by the inner wall portion and the first fixing member being screwed together; a second sealing member having a circular ring shape, which is provided between the optical member and the outer wall portion or the second fixing member and is compressed when the outer wall portion and the second fixing member are screwed together; The camera housing further comprises:

5. A lighting device that is detachable from a camera, a base member having inner and outer wall portions that protrude toward an object side relative to a seating surface on which a lens barrel is attached and that form concentric circles centered on the attachment position of the lens barrel; an annular light source provided between the inner wall portion and the outer wall portion; an annular optical member disposed on an object-side end surface of the inner wall portion and the outer wall portion; a cylindrical first fixing member that is threadedly engaged with an inner circumferential surface of the inner wall portion, the first fixing member having a first pressing portion that protrudes radially outward from at least a portion of a circumference of an object side end portion; a cylindrical second fixing member that is screwed onto an outer peripheral surface of the outer wall portion, the second fixing member having a second pressing portion that protrudes radially inward from at least a portion of a circumference of an object side end portion; Equipped with the first fixing member and the second fixing member are configured to press the optical element from the object side toward the object-side end faces of the inner wall portion and the outer wall portion by the first pressing portion and the second pressing portion while being screwed into the inner wall portion and the outer wall portion, respectively.

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