Imaging device attachment mechanism and method for attaching imaging device

Abstract

To provide an imaging device mounting mechanism capable of mounting an imaging device at an appropriate position of a bicycle while suppressing influence on imaging, and an imaging device mounting method.SOLUTION: Solution to Problem An imaging device attachment mechanism according to the present invention includes: a pedestal fixed to a lower side of an extending portion of a stem of a bicycle, the extending portion extending along a front-rear direction of the bicycle; a holder configured to hold an imaging device; and a connector configured to connect the pedestal fixed to the stem and the holder disposed below the pedestal.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an imaging device attachment mechanism and an imaging device attachment method. [Background technology]

[0002] By attaching a photographic device such as a digital camera or a communication terminal with a built-in camera to a bicycle, it is possible to capture images from the bicycle while riding, for example. A device mounting fixture is used to mount the photographic device to the bicycle frame. Such a fixture is fixed to a part of the frame while holding the photographic device. One example is the case of mounting a photographic device (e.g., a smartphone or tablet PC) to the handlebars of a bicycle, as described in Patent Document 1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-150744 Summary of the Invention [Problem to be solved by the invention]

[0004] When attaching a camera to a bicycle, it is desirable to place the camera in a position that does not get in the way of the cyclist (rider), specifically, a position that does not interfere with the rider's body. Also, when using a camera attached to a bicycle to capture video while riding, it is necessary to stabilize the position of the camera to minimize any interference with the video.

[0005] On the other hand, if the camera device is attached to the handlebars of the bicycle as in Patent Document 1, the camera device may interfere with the rider's body depending on the rider's posture. Also, when the handlebars are operated to change the direction of travel of the bicycle, the camera device moves integrally with the handlebars, which makes it easy for the images captured by the camera device to become blurred.

[0006] Therefore, an object of the present invention is to provide a photographic device mounting mechanism and a photographic device mounting method that can mount a photographic device at an appropriate position on a vehicle while minimizing the impact on photography. [Means for solving the problem]

[0007] A photographing device mounting mechanism according to one aspect of the present invention is characterized by comprising a base portion fixed to the underside of an extension portion of a bicycle stem that extends in the fore-and-aft direction of the bicycle, a holding portion that holds the photographing device, and a connecting portion that connects the base portion fixed to the stem and the holding portion positioned below the base portion. [Effects of the Invention]

[0008] According to one aspect of the present invention, a photographing device mounting mechanism and a photographing device mounting method are provided that are capable of mounting a photographing device at an appropriate position on a vehicle while minimizing the impact on photography. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a front view of a bicycle with a photographing device attached thereto. [Figure 2] 1 is a side view showing the area around the photographing device of a bicycle to which the photographing device is attached. [Figure 3] 1 is a plan view of a base portion provided in an imaging device attachment mechanism according to one embodiment of the present invention. [Figure 4] 1 is a front view of a base portion provided in an imaging device attachment mechanism according to one embodiment of the present invention. [Figure 5]1 is a side view of a base portion provided in an imaging device attachment mechanism according to one embodiment of the present invention. [Figure 6] 1 is a front view of a holding portion and a connecting portion provided in an imaging device attachment mechanism according to one embodiment of the present invention. FIG. [Figure 7] 10 is a rear view of a holding portion and a connecting portion provided in the photographing device attachment mechanism of one embodiment of the present invention. FIG. [Figure 8] 10 is a side view of a holding portion and a connecting portion provided in the photographing device attachment mechanism of one embodiment of the present invention. FIG. [Figure 9] 1 is an exploded view of a holding portion provided in an imaging device attachment mechanism according to an embodiment of the present invention. [Figure 10] 10A to 10C are diagrams showing a procedure for fixing the base to the stem. [Figure 11] FIG. 10 is a diagram showing the positional relationship between the base and the stem, and is a diagram showing the base fixed to the stem as viewed from below. [Figure 12] FIG. 10 is a perspective view showing a fastening structure between a connecting portion and a holding portion. DETAILED DESCRIPTION OF THE INVENTION

[0010] The photographic device attachment mechanism and photographic device attachment method of the present invention will be described below using a specific embodiment (hereinafter, the present embodiment) as an example. However, the embodiment described below is merely an example to facilitate understanding of the present invention and does not limit the present invention. In other words, the present invention can be modified or improved from the following embodiment without departing from the spirit of the present invention. Furthermore, the materials, shapes, design dimensions, etc. of the members and parts used in the present invention can be set arbitrarily depending on the application of the present invention and the state of the art at the time of implementation of the present invention. Furthermore, the present invention includes equivalents thereof.

[0011] In the following description, "front side" refers to the front side of the bicycle, i.e., the side facing the direction of travel of the bicycle, and "rear side" refers to the rear side of the bicycle, i.e., the side opposite the direction of travel of the bicycle. In the following description, "front-rear direction" and "left-right direction" refer to the front-rear direction and left-right direction of the bicycle, respectively. In the following description, "device attached state" refers to the state in which the imaging device is attached to the bicycle.

[0012] The position, posture, orientation, etc. of each component described below refers to the position, posture, orientation, etc. when the device is attached, unless otherwise specified.

[0013] <<Photographing device attachment mechanism according to this embodiment>> The use and configuration example of the photographing device attachment mechanism (hereinafter referred to as attachment mechanism 10) according to this embodiment will be described with reference to the drawings.

[0014] 1, the attachment mechanism 10 is a device used to attach a camera-equipped communication terminal as a photographing device, specifically a smartphone SP with a built-in camera, to a racing bicycle B. The attachment mechanism 10 allows the smartphone SP to be attached to the body frame of the bicycle B in a position that does not get in the way of the rider (rider) of the bicycle B.

[0015] Specifically, the smartphone SP is attached to the front portion of the vehicle frame by the attachment mechanism 10, and more specifically, is located below the extension portion Bg of the stem Bs and forward of the front fork Bf (also called the head cap) as shown in FIG. 2. The extension portion Bg is a portion of the stem Bs that connects the handlebars and the front fork Bf and extends in the front-to-rear direction. The structure and type of the stem Bs are not particularly limited, and may be, for example, either a threaded stem or an ahead stem.

[0016] When the device is attached, as shown in Figure 1, the lens R of the camera built into the smartphone SP is exposed and faces forward (front) or backward (rear) in the direction of travel of the bicycle B. This allows the camera of the smartphone SP to capture images in front or behind the bicycle B while the bicycle B is traveling.

[0017] The attachment mechanism 10 has a base portion 20 shown in Figures 3 to 5, a holding portion 40 shown in Figures 6 to 9, and a connecting portion 60 shown in Figures 6 to 8, and is configured by combining these. Each component part of the attachment mechanism 10 will be described below individually.

[0018] (Base part) The base portion 20 constitutes the portion of the attachment mechanism 10 that is fixed to the bicycle B, and is fixed to the underside of the extending portion Bg of the stem Bs, more specifically, directly below the extending portion Bg, as shown in Figures 2 and 10. The base portion 20 of this embodiment is made up of a first plate portion 21 and a second plate portion 22 shown in Figures 3 to 5. In this embodiment, the first plate portion 21 and the second plate portion 22 are separate parts, but this is not limiting, and the first plate portion 21 and the second plate portion 22 may not be separate parts but may be made up of a single part.

[0019] As shown in Fig. 3, the first plate portion 21 is a plate portion with a rectangular outer edge shape and is made of a metal plate having a certain thickness. Here, "rectangle" includes squares and rectangles, and also includes rectangles with rounded chamfered corners. The first plate portion 21 is provided with a plurality of holes 23; more specifically, a hole 23 penetrating the first plate portion 21 is formed at each of the four corners of the first plate portion 21. The holes 23 are circular holes formed to allow the fixing member I, described below, to pass through.

[0020] The second plate portion 22 is made of metal fittings molded into a predetermined shape, and as shown in Figures 3 to 5, has a flat plate portion 24 fixed to the center of the surface of the first plate portion 21 with screws, and three protrusions 25 protruding from the surface of the flat plate portion 24 (the surface opposite to the side that contacts the first plate portion 21).

[0021] The three protrusions 25 protrude in a direction perpendicular to the surface of the first plate portion 21, each having a substantially circular shape in a side view (see FIG. 4), and are arranged at equal intervals in the left-right direction. Each of the three protrusions 25 has a through-hole 26, and the positions of the through-holes 26 in each of the protrusions 25 are substantially the same among the protrusions 25. As will be described later, the base portion 20 supports the supported portion 61 of the connecting portion 60 with the three protrusions 25.

[0022] (holding part) The holding portion 40 is a portion of the attachment mechanism 10 that holds the smartphone SP. The holding portion 40 of this embodiment is made of a resin molded product, and has a case portion 41 that houses the smartphone SP therein, and a support portion 42 that protrudes upward from the case portion 41, as shown in FIG.

[0023] 6 and 7, the case part 41 is a generally rectangular part that extends elongatedly in the width direction and is generally rectangular in plan view, and in the device-attached state, the width direction of the case part 41 is generally aligned with the left-right direction of the bicycle B. The case part 41 has a shell structure that is divided into a front half and a rear half. Explaining in more detail, as shown in FIG. 9, the case part 41 is made up of a front case part 43 that faces the front in the device-attached state and a rear case part 44 that faces the rear.

[0024] The front case part 43 is a dish-shaped case part similar to known smartphone covers, and covers the back surface (the surface opposite the display) of the smartphone SP housed in the case part 41. As shown in Figures 6 and 9, the front case part 43 is provided with a front opening part 45 for exposing the photographing lens R provided on the back surface side of the smartphone SP. The front opening part 45 is an example of an opening, and is, for example, a substantially oval-shaped long hole. The shape of the front opening 45 is not particularly limited as long as the lens R can be exposed through the front opening 45 .

[0025] The rear case part 44 is a case part made of a rectangular frame, and surrounds the outer edge of the surface (the surface on which the display is provided) of the smartphone SP housed in the case part 41. The rear case part 44 is also provided with a rear opening part 46 for exposing the entire area of ​​the display of the smartphone SP, as shown in Figures 7 and 9. If the smartphone SP also has a lens for photographing on the surface side, it is preferable that the lens be exposed through the rear opening part 46.

[0026] The rear case part 44 is combined with the front case part 43, and specifically, the lower end part of the rear case part 44 is connected to the lower end part of the front case part 43 via a hinge 47. Furthermore, gate-shaped engaging parts 48 are provided on the upper end part and side end part of the rear case part 44, respectively, and each engaging part 48 can engage with a corresponding one of claw-shaped engaged parts 49 provided on the upper end part and side end part of the front case part 43.

[0027] The case 41 configured as described above can be opened and closed freely. In other words, the state of the case 41 can be switched between a closed state in which the rear case 44 is joined to the front case 43 and an open state in which the rear case 44 is detached from the front case 43. When the case 41 is in the open state, the smartphone SP is placed between the front case 43 and the rear case 44, and then the case 41 is closed to accommodate the smartphone SP inside the case 41. When the case 41 is switched from the open state to the closed state, each engaging portion 48 engages with the corresponding engaged portion 49, thereby maintaining the case 41 in the closed state.

[0028] The support pillar 42 is a cylindrical portion extending upward from the upper end of the case portion 41 (more specifically, the front case portion 43). As shown in Fig. 9, the support pillar 42 has a screw hole 50 formed therein that extends in the extension direction of the support pillar 42, and a screw (female thread) is provided on the inner wall surface of the screw hole 50. In this embodiment, the support pillar 42 extends from a central portion in the width direction (i.e., the left-right direction) of the case portion 41, of the upper end of the case portion 41, as shown in Figs. 7 and 9.

[0029] (Connection part) The connecting portion 60 is a portion of the attachment mechanism 10 that connects the base portion 20 and the holding portion 40, and is assembled to both the base portion 20 and the holding portion 40. The connecting portion 60 is formed, for example, from a metal fitting or the like formed into a predetermined shape, and as shown in FIGS. 6 to 8, includes a supported portion 61 that is supported by the base portion 20, and a forward extending portion 62 that extends forward from the supported portion 61.

[0030] The supported portion 61 is composed of a pair of plate pieces aligned in the left-right direction as shown in Fig. 7, and each plate piece has the same shape and a support hole 63 which is a through hole (see Fig. 8). The connecting portion 60 is supported on the base portion 20 in a rotatable state by the supported portion 61 and the three protrusions 25 of the base portion 20.

[0031] More specifically, each of the pair of plate pieces constituting the supported portion 61 is inserted into the gap formed between the protruding portions 25. At this point, the connecting portion 60 including the supported portion 61 is rotatable relative to the base portion 20 in the direction of the arrow shown in FIG. 2 (i.e., the rotation direction). After the connecting portion 60 is rotated to a desired position in the rotation direction, the through holes 26 formed in each of the three protruding portions 25 and the support holes 63 formed in each of the pair of plate pieces are aligned, and the position fixing screws 30 are inserted into these holes. Furthermore, nuts (not shown) are fitted onto the position fixing screws 30. This fixes the position of the connecting portion 60 in the rotation direction of the connecting portion 60. In other words, the position fixing screws 30 are used to fix the position of the connecting portion 60 in the rotation direction.

[0032] The forward extending portion 62 is formed of a flat plate extending forward, and as shown in FIG. 12, a circular insertion hole 64 is provided at the tip portion (front end portion) of the forward extending portion 62. A screw (hereinafter referred to as a fastening screw 65) for fastening the holding portion 40 to the forward extending portion 62 is inserted into the insertion hole 64. The fastening screw 65 is a male thread, and is inserted into the screw hole 50 formed in the support portion 42 of the holding portion 40 and the insertion hole 64 while these holes are in communication with each other. This fixes the support portion 42 to the tip portion of the forward extending portion 62, and as a result, the holding portion 40 is supported by the connecting portion 60 (see FIG. 12).

[0033] In this embodiment, since the support pillar 42 is provided in the central portion in the width direction of the case 41, the tip portion of the forward extending portion 62 is fixed to the central portion of the holding portion 40 in the left-right direction. Furthermore, by removing the fastening screw 65 from the screw hole 50 and the insertion hole 64, the holding portion 40 can be removed from the connecting portion 60. In this way, the holding portion 40 is supported by the fastening screw 65 in a detachable manner relative to the connecting portion 60.

[0034] [How to install the shooting device] Next, a method for attaching the smartphone SP to the bicycle B using the above-described attachment mechanism 10 will be described with reference to FIGS.

[0035] At the start of installation, the base portion 20, the holding portion 40, and the connecting portion 60 that make up the installation mechanism 10 are separated from one another. When starting installation, first, the base portion 20 is fixed to the underside of the extension portion Bg of the stem Bs. More specifically, as shown in FIG. 10, when fixing the base portion 20, a protective sheet P is wrapped around the periphery of the extension portion Bg. The protective sheet P is a sheet with vibration-damping properties, and is made of, for example, a rubber tube.

[0036] Thereafter, the base portion 20 is positioned directly below the extension portion Bg around which the protective sheet P is wrapped, and while maintaining the base portion 20 in that position, a fixing member I is passed through each of the four holes 23 formed in the first plate portion 21. Specifically, one fixing member I is passed through two of the four holes 23, and the other fixing member I is passed through the remaining two holes 23. The fixing member I is a string-like member such as a rope or binding cord for securing cargo, or a belt-like member such as an insulock (cable tie) or a fastening belt.

[0037] Then, each fixing member I passed through the hole 23 is fastened to the extending portion Bg around which the protective sheet P is wrapped. As a result, the first plate portion 21 of the base portion 20 is fastened to the extending portion Bg by each fixing member I, and as a result, the base portion 20 is fixed to the extending portion Bg via the protective sheet P. At this time, as shown in FIG. 10, the base portion 20 is fixed to the extending portion Bg with the three protrusions 25 provided on the base portion 20 facing downward in the vertical direction. Also, as shown in FIG. 11, the base portion 20 is fixed to the extending portion Bg so that the center of the base portion 20 in the left-right direction of the bicycle B overlaps with the extending portion Bg in the left-right direction, more specifically, so that it overlaps with the center of the extending portion Bg.

[0038] Next, the supported portion 61 of the connecting portion 60 is supported by the base portion 20. Specifically, each of the pair of plate pieces constituting the supported portion 61 is attached to the three protruding portions 25 provided on the base portion 20, and more specifically, inserted into the gaps between the protruding portions 25. In this way, the connecting portion 60 is supported on the base portion 20 in a rotatable state.

[0039] Then, after rotating the connecting portion 60 to a desired position in the rotation direction of the connecting portion 60, the position fixing screws 30 are inserted into the through holes 26 formed in each of the three protrusions 25 and the support holes 63 formed in each of the pair of plate pieces. Then, nuts (not shown) are fitted onto the position fixing screws 30. As a result, the position of the connecting portion 60 in the rotation direction is fixed by the position fixing screws 30 and the nuts.

[0040] Next, the smartphone SP is held by the holding unit 40, and more specifically, the smartphone SP is housed in the case portion 41 of the holding unit 40. Thereafter, the holding unit 40 is positioned below the base 20, and more specifically, the holding unit 40 is positioned near the tip of the forward extension portion 62 of the connecting portion 60 supported by the base 20. At this time, the holding unit 40 is in a state where the support portion 42 is positioned above the case portion 41.

[0041] Next, while maintaining the holding portion 40 in the above-described position, the holding portion 40 is fixed to the tip portion of the forward extending portion 62. More specifically, after the upper end of the support portion 42 is abutted against the underside of the tip portion of the forward extending portion 62, a fastening screw 65 is inserted into the screw hole 50 formed in the support portion 42 and the insertion hole 64 formed in the tip portion of the forward extending portion 62. This causes the holding portion 40 to be supported by the connecting portion 60, and as a result, the base portion 20 fixed to the extending portion Bg of the stem Bs and the holding portion 40 arranged below the base portion 20 are connected by the connecting portion 60.

[0042] In addition, after connecting the base portion 20 and the holding portion 40 with the connecting portion 60, the position fixing screw 30 can be loosened to make the connecting portion 60 rotatable relative to the base portion 20, and after adjusting the position of the connecting portion 60 in the rotation direction, the position fixing screw 30 can be tightened again.

[0043] When the base 20 fixed to the extension portion Bg and the holding portion 40 are connected by the connecting portion 60, the case portion 41 of the holding portion 40 and the smartphone SP housed therein are located below the extension portion Bg and in front of the front fork Bf, as shown in Fig. 2. In addition, in the above state, the holding portion 40 is located below the tip portion of the forward extension portion 62, and more specifically, is arranged in a posture in which it is suspended from the forward extension portion 62 as shown in Fig. 2. Furthermore, in the above state, the position fixing screw 30 is located below the extension portion Bg and in front of the front fork Bf, as shown in Fig. 2.

[0044] By following the procedure described above, the smartphone SP is attached to the bicycle B by the attachment mechanism 10. As a result, while the bicycle B is traveling, the camera built into the smartphone SP can capture images of the front or rear of the bicycle B from the bicycle side.

[0045] [Other embodiments] Up to this point, we have explained the photographing device attachment mechanism and photographing device attachment method of the present invention using one specific example, but the above-mentioned embodiment is merely an example, and other embodiments may be considered.

[0046] In the above embodiment, a camera-equipped communication terminal, specifically a camera-equipped smartphone, is given as an example of the photographing device, but this is not limited thereto and the photographing device may be a camera-equipped tablet PC or a digital camera. Also, in the above embodiment, the bicycle to which the photographing device is attached is a racing bicycle, but this is not limited thereto and the photographing device may be any bicycle other than a racing bicycle as long as it has a stem and a front fork.

[0047] Furthermore, in the above embodiment, the shape of the outer edge of the plate portion (more specifically, the first plate portion 21) of the base portion 20 is rectangular, but the shape of the outer edge of the plate portion is not particularly limited and may be a triangle, a quadrangle other than a square, a polygon with pentagons or more sides, a circle or an ellipse, or any other shape.

[0048] In the above embodiment, the holding unit 40 includes a case 41, and holds a smartphone SP as a photographing device by accommodating the smartphone SP in the case 41. However, the means or mechanism for holding the photographing device is not particularly limited, and may be, for example, a clamp-type holding means or a clip-type holding means. Also, if the housing of the photographing device is provided with a hole for fixing a tripod, the holding means may be a rod-shaped holding means that can fit into the hole (more specifically, fit with a screw).

[0049] In the above embodiment, the tip of the forward extension 62 of the connecting part 60 is fixed to the central part of the holding part 40 (more specifically, the case part 41) in the left-right direction of the bicycle B. However, this is not limited to this, and the forward extension 62 may be fixed to a part of the holding part 40 other than the central part in the left-right direction, for example, to an end part.

[0050] In the above embodiment, the base 20 is disposed below the extending portion Bg of the stem Bs and fixed to the extending portion Bg. However, the base 20 only needs to be fixed to the stem Bs below the extending portion Bg, and the location on the stem Bs where the base 20 is fixed is not limited to the extending portion Bg. For example, if the stem has a portion extending in the vertical direction, such as a threaded stem, the base 20 may be fixed to that portion. In the above embodiment, the protective sheet P is wrapped around the periphery of the extending portion Bg, and the base 20 is fixed to the extending portion Bg via the protective sheet P. However, this is not limited to this, and the base 20 may be fixed directly to the extending portion Bg.

[0051] In the above embodiment, the photographing device attachment mechanism according to the present invention is applied to a bicycle, but the present invention can also be applied to any vehicle that has a handlebar extending horizontally and a frame that extends in the front-to-rear direction (the direction of travel) and is connected to the handlebar. In other words, the photographing device attachment mechanism according to the present invention can be used to attach a photographing device to the frame of the vehicle.

[0052] [summary] The present invention is achieved by the following configurations [1] to

[13] , and each configuration can provide various effects.

[0053] [1] The photographing device mounting mechanism of the present invention comprises a base portion fixed to the underside of an extension portion of the bicycle stem that extends along the fore-and-aft direction of the bicycle, a holding portion that holds the photographing device, and a connecting portion that connects the base portion fixed to the stem and the holding portion positioned below the base portion. By using the above-described camera device attachment mechanism, the camera device can be attached to an appropriate position on the bicycle while minimizing the impact on the image capture. Specifically, when attaching a camera device to a bicycle, the camera device and attachment mechanism must be positioned so as not to interfere with the body of the cyclist (rider). In this invention, the camera device and attachment mechanism can be positioned using the space below the stem's extension, which extends in the fore-and-aft direction of the bicycle. This allows the camera device to be attached to the bicycle while avoiding interference with the cyclist's body. Furthermore, for example, in racing bicycles, the rider may lean forward while riding. Even in this case, however, the camera device can be positioned below the stem's extension, thereby avoiding interference with the rider's body. Furthermore, if the camera device is fixed to the handlebars of a bicycle, as in the case of Patent Document 1, the camera device will move integrally with the handlebars when the rider moves the handlebars while riding. If the camera device is capturing video at this time, the capture may be affected, and more specifically, the captured video may become blurred. In contrast, in the present invention, the base of the mounting mechanism is fixed to the stem of the bicycle frame, which is less affected by the movement of the handlebars. This stabilizes the position of the camera device while the bicycle is riding (i.e., it is less likely to move integrally with the handlebars). This reduces the impact of the camera device on the capture, i.e., blurring of the video.

[0054] [2] In the photographing device attachment mechanism of the present invention, the connecting portion may include a supported portion supported by the base portion and a forward extending portion extending from the supported portion toward the front of the bicycle. In this case, it is preferable that the tip of the forward extending portion is fixed to the center portion of the holding portion in the left-right direction of the bicycle. By fixing the connecting portion to the center portion of the holding portion in this way, the holding portion can be supported in a balanced manner compared to, for example, when the connecting portion is fixed to the end portion of the holding portion, and the support state of the holding portion can be made more stable.

[0055] [3] In addition, in the photographing device attachment mechanism of the present invention, when the base portion fixed to the stem and the holding portion are connected by the connecting portion, the holding portion may be located below the tip of the forward extension portion. In this case, the holding portion and the photographing device can be positioned farther away from the bicycle rider, making it easier to avoid interference between the photographing device and the rider's body.

[0056] [4] In addition, in the photographing device attachment mechanism of the present invention, when the base portion fixed to the stem and the holding portion are connected by the connecting portion, the holding portion may be located below the extension portion and forward of the front fork of the bicycle. In this case, the holding portion and the photographing device can be positioned further away from the bicycle rider, making it easier to avoid interference between the photographing device and the rider's body.

[0057] [5] In the photographing device attachment mechanism of the present invention, the connecting part may be rotatably supported by the base part, and may further include a position fixing screw for fixing the position of the connecting part in the rotation direction of the connecting part. Furthermore, when the base part fixed to the stem and the holding part are connected by the connecting part, the position fixing screw may be located below the extension part and forward of the front fork of the bicycle. According to the above configuration, by rotating the connecting part, the positions of the holding part and the photographing device can be changed in the direction of rotation of the connecting part, thereby changing the photographing direction of the photographing device (i.e., the direction of the angle of view). Furthermore, by fixing the position of the connecting part after rotation with a position fixing screw, the position of the connecting part can be stably maintained. Furthermore, because the position fixing screw is located below the extension part of the stem and forward of the front fork, the position fixing screw can be separated from the bicycle rider. As a result, the photographing direction of the photographing device can be changed without interfering with the rider's body.

[0058] [6] In the photographic device attachment mechanism of the present invention, the holding portion may have a case portion that houses the photographic device, and the front case portion of the case portion that faces the front of the bicycle may be provided with an opening for exposing the lens of the photographic device. In this case, the case portion can more stably hold the photographic device. Furthermore, even when the photographic device is housed in the case portion, the lens is exposed through the opening, allowing the lens to be used to capture images appropriately.

[0059] [7] In the photographing device attachment mechanism of the present invention, the connecting part may be provided with an insertion hole, and the holding part may have a screw hole and be detachably supported on the connecting part by a screw inserted into the insertion hole and the screw hole. In this case, the holding part can be easily attached and detached from the connecting part, which makes it easy to replace and maintain the photographing device held by the holding part.

[0060] [8] In the photographic device attachment mechanism of the present invention, the base may include a plate having a plurality of holes. In this case, it is preferable that the base is fixed to the stem by fastening the plate to the stem with a string-like or band-like fastening member threaded through the plurality of holes. This configuration makes it easy to fasten the base to the stem, thereby facilitating attachment of the photographic device to the bicycle. Furthermore, the above configuration can be easily adapted to changes in the shape of the stem, allowing the base to be properly fixed to the stem.

[0061] [9] In the photographic device attachment mechanism of the present invention, the outer edge of the plate portion may be rectangular, and the plurality of holes may be holes formed at each of the four corners of the plate portion. In this case, the base portion can be more stably fixed to the stem, thereby maintaining a good attachment state of the photographic device to the bicycle. As a result, the impact of the photographic device on photography can be more effectively reduced.

[0062]

[10] In addition, in the photographing device attachment mechanism of the present invention, the base may have a protrusion that protrudes in a direction intersecting the surface of the plate, and the protrusion may support the connecting part. In this case, the base may be fixed to the stem with the protrusion facing downward in the vertical direction. With this configuration, the distance between the holding part located below the base and the base (specifically, the protrusion) can be made shorter, thereby making it possible to further miniaturize the connecting part that connects the holding part and the base. This makes it easier to avoid the connecting part interfering with the body of the bicycle rider.

[0063]

[11] In the photographic device attachment mechanism of the present invention, the base may be fixed to the extension via a vibration-damping sheet wrapped around the periphery of the extension. In this case, vibrations generated in the body frame while the bicycle is being ridden can be prevented from being transmitted to each part of the photographic device attachment mechanism, including the base. This further effectively reduces the impact of the photographic device on photography while the bicycle is being ridden.

[0064]

[12] In the photographic device attachment mechanism of the present invention, the base may be fixed to the stem so that the center of the base in the left-right direction of the bicycle overlaps with the extension in the left-right direction. In this case, it is easier to stabilize the state in which the base is fixed to the stem. This allows the photographic device to be maintained in a good state attached to the bicycle, and as a result, the impact of the photographic device on photography is more effectively reduced.

[0065]

[13] Furthermore, the method of mounting a photographing device of the present invention is characterized in that a base portion is fixed to the underside of an extension portion of the stem of a bicycle that extends along the fore-and-aft direction of the bicycle, a holding portion that holds the photographing device is positioned below the base portion, and the base portion fixed to the stem and the holding portion positioned below the base portion are connected by a connecting portion. According to the above mounting method, the imaging device can be mounted in an appropriate position on the bicycle while minimizing the impact on imaging. [Explanation of symbols]

[0066] 10. Mounting mechanism (photographic device mounting mechanism) 20 Base 21 First plate section 22 Second plate section 23 holes 24 Flat plate part 25 Protrusion 26 Through hole 30 Position fixing screw 40 Holding part 41 Case part 42 Pillar section 43 Front case part 44 Rear case part 45 Front opening (opening) 46 Rear opening 47 Hinge 48 Engagement part 49 Engaged part 50 screw holes 60 Connection part 61 Supported part 62 Front extension 63 Support hole 64 Insertion hole 65 Fastening screw B. Bicycle Bg extension part Bs stem Bf front fork I Fixing member P Protective sheet (vibration-proof sheet) R lens SP Smartphone (photography device)

Claims

1. a base portion fixed to a lower side of an extension portion of the bicycle stem that extends along the front-to-rear direction of the bicycle; a holder for holding the photographing device; The photographing device attachment mechanism includes a connecting portion that connects the base portion fixed to the stem and the holding portion arranged below the base portion.

2. the connecting portion includes a supported portion that is supported by the base portion, and a forward extending portion that extends from the supported portion toward the front of the bicycle, The photographing device attachment mechanism according to claim 1 , wherein a tip portion of the forward extension portion is fixed to a central portion of the holding portion in the left-right direction of the bicycle.

3. The photographing device mounting mechanism of claim 2, wherein when the base portion fixed to the stem and the holding portion are connected by the connecting portion, the holding portion is positioned below the tip portion of the forward extension portion.

4. 4. The photographing device mounting mechanism according to claim 1, wherein when the base portion fixed to the stem and the holding portion are connected by the connecting portion, the holding portion is positioned below the extension portion and forward of the front fork of the bicycle.

5. the connecting portion is supported by the base portion in a rotatable state, a position fixing screw for fixing the position of the connecting portion in the rotation direction of the connecting portion; 5. The photographing device mounting mechanism according to claim 1, wherein when the base portion fixed to the stem and the holding portion are connected by the connecting portion, the position fixing screw is located below the extension portion and forward of the front fork of the bicycle.

6. the holding unit has a case unit that houses the photographing device therein, The photographing device mounting mechanism according to any one of claims 1 to 5, wherein the front case portion of the case portion facing the front of the bicycle has an opening for exposing a lens of the photographing device.

7. The connecting portion is provided with an insertion hole, The photographing device attachment mechanism according to claim 1 , wherein the holding portion has a screw hole, and is detachably supported on the connecting portion by a screw inserted into the insertion hole and the screw hole.

8. the base portion has a plate portion provided with a plurality of holes, The photographing device mounting mechanism of any one of claims 1 to 7, wherein the base portion is fixed to the stem by fastening the plate portion to the stem with a string-like or band-like fixing member passed through the plurality of holes.

9. The outer edge shape of the plate portion is rectangular, The photographing device attachment mechanism according to claim 8 , wherein the plurality of holes are holes formed at four corners of the plate portion.

10. the base portion has a protruding portion that protrudes in a direction intersecting with a surface of the plate portion, and the protruding portion supports the connecting portion; The photographing device attachment mechanism according to claim 8 , wherein the base is fixed to the stem with the protruding portion facing downward in the vertical direction.

11. The photographing device attachment mechanism according to claim 1 , wherein the base is fixed to the extending portion via a vibration-proof sheet wrapped around a peripheral surface of the extending portion.

12. The photographing device mounting mechanism according to any one of claims 1 to 11, wherein the base portion is fixed to the stem so that a central portion of the base portion in the left-right direction of the bicycle overlaps with the extension portion in the left-right direction.

13. a base portion fixed to a lower side of an extension portion of the bicycle stem that extends along the front-to-rear direction of the bicycle; a holding unit that holds a photographing device is disposed below the base unit; A method for attaching a photographing device, comprising connecting the base portion fixed to the stem and the holding portion arranged below the base portion with a connecting portion.

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