JP2012006497A - Drive recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a derive recorder in which an acceleration sensor can be always set in a horizontal state regardless of an orientation of a lens for photographing.SOLUTION: The drive recorder 1 is set by mounting a body case 2 to a windshield by the use of a mounting bracket 3, and stores image data acquired via the lens for photographing in preceding and succeeding time zones that include the time zone when predetermined acceleration is detected triggered by the detection of acceleration equal to or higher than a constant value by an acceleration sensor. The acceleration sensor is mounted to a holder 7 that is rotatably supported with respect to the body case 2, the holder 7 is rotated in the same direction as the elevation or depression direction of the body case 2, and the holder 7 is stopped and held at an optional rotation position causing no trouble in a detection by the acceleration sensor.

Description

  The present invention relates to a drive recorder mounted on a vehicle that detects acceleration generated suddenly in the vehicle with an acceleration sensor and records captured images before and after the detected time.

A drive recorder is a device that is mounted at a front position in a vehicle in order to record captured images before and after a traffic accident. As a behavior of the vehicle when a traffic accident occurs, a sudden deceleration due to a collision or sudden braking, or a sudden turn for avoiding danger is performed. The drive recorder is configured to detect the acceleration generated at that time, and to record captured images before and after the detected time when the acceleration sensor detects an acceleration greater than a certain value. More specifically, the drive recorder normally updates the captured image acquired by the imaging lens to the latest captured image sequentially while temporarily storing it in the memory, and the detected value exceeding the threshold value of the acceleration sensor (that is, When the acceleration value based on sudden deceleration or sudden turn is obtained, the captured image after the detection is first stored in a non-volatile memory (for example, an SD memory card), and further before the time zone when the detected value is obtained. The captured images are read from the memory and stored in the non-volatile memory, so that the captured images before and after the accident are saved. Furthermore, in recent years, a GPS receiver is mounted on the drive recorder, and the location information of the place where such a traffic accident has occurred is stored as accident data integrated with the photographed image and used for accident analysis.
In general, drive recorders are attached as shown in Patent Documents 1 to 3, with attachment means (attachment part, fixing member, etc.) formed on the upper surface of the main body attached to a predetermined position on the windshield such as an adhesive tape or sucker. It is designed to be fixed by means. The mounting plate is inclined at a predetermined angle corresponding to the angle of the windshield, and the drive recorder is mounted so that the photographing lens faces the front. Further, the angle of the windshield on which the drive recorder is mounted may vary depending on the vehicle type. In this case, as disclosed in Patent Document 3, the main body and the mounting plate are relatively rotated according to the angle, and the front windshield is mounted. Even if the glass angles are different, it is possible to always direct the direction of the photographing lens in a certain direction.

JP 2006-193057 A JP 2006-321423 A JP 2010-105530 A

By the way, in mounting, the direction of the photographing lens is generally set so as to face the front horizontal direction. The built-in acceleration sensor is arranged as a default state when the photographing lens is in such a horizontal state. However, the angle of the windshield on which the drive recorder is mounted is not necessarily constant. For windshields with different angles, a model in which the direction of the photographing lens can be arranged in front by rotating the main body as in Patent Document 3 above. Anyway, in the case of a drive recorder without such a mechanism (that is, Patent Document 1 or 2 in the above), the direction of the photographing lens (the direction of the axis passing through the lens geometric center) is not necessarily the horizontal direction, In some cases, there is a need to have a slight elevation angle (note that even if there is an elevation angle, the photographing lens is generally a wide-angle lens, so the image area itself is not a big problem). Therefore, in such a model, the built-in acceleration sensor is also arranged with a certain elevation angle with respect to the horizontal direction, and the acceleration sensor has a horizontal vector component given by the x-axis and the y-axis. In addition, there is a possibility that it becomes a composite value with a vector component in the vertical direction given by the z axis.
For example, with respect to the drive recorder 100 as shown in FIG. 18A, the state where the acceleration sensor 101 as shown in FIG. 18B is inclined with respect to the reference position is verified. The acceleration A in the x-axis direction of the acceleration sensor 101 in FIG. 18B is a combined vector A (x ₁ , z ₁ ) of the actual acceleration x _{1 in} the x-axis direction and the actual acceleration z _{1 in} the z-axis direction. . That is, the magnitude of A (x ₁ , z ₁ ) is detected in spite of the actual x ₁ acceleration. In other words, although only the horizontal component was originally required, the vertical vector component based on the vertical fluctuation was also recognized as the horizontal acceleration component, causing the acceleration sensor to malfunction. .
In order to prevent this, it is necessary to appropriately adjust the sensitivity and acceleration direction data input set as defaults according to the angle of the main body by a computer. For that purpose, when data input is performed to the built-in memory of the main unit, the computer and the main unit must be connected via a cable to change the setting of the acceleration sensor, and the data input is connected to the external memory ( For example, if it is performed on an SD memory card, the memory must be taken out from the drive recorder and set on the computer side to change the settings. It was.

On the other hand, with respect to Patent Document 3, it is possible to keep the acceleration sensor horizontal by rotating the main body with respect to the mounting plate so that the photographing lens is arranged in the front horizontal direction. In order to set without error so that it is not necessary to change the default setting, it is necessary to turn the direction of the photographing lens to the front very carefully, and it takes time to install the drive recorder itself.
Furthermore, in large vehicles such as trucks and buses where the boarding position is high, there is a demand for the direction of the photographing lens itself to be directed downward rather than in front. This is because, in a large vehicle, an accident such as a collision generally occurs at a position looking down from the upper boarding position, so it is realistic to store a photographed image in the downward direction as a drive recorder arranged at the boarding position. . However, when the direction of the photographic lens is greatly lowered, the acceleration sensor is greatly inclined, and it is difficult to cope with it by simply changing the input of sensitivity and horizontal data programmatically.
The present invention has been made to solve the above problems, and an object of the present invention is to provide a drive recorder that can always set the acceleration sensor in a horizontal state regardless of the orientation of the photographing lens. is there.

In order to achieve the above object, the first means is attached to the inside of the vehicle through the fixing means so as to photograph the front through the windshield by the photographing lens exposed from the main body case, and the acceleration sensor exceeds a certain value. In the drive recorder that stores the image data of the time zones before and after that including at least the time zone in which the predetermined acceleration detected from the photographing lens is detected using the detection of the acceleration as a trigger, the acceleration sensor includes: The mounting member is supported so as to rotate in the same direction as the supine direction of the photographing lens. The mounting member is rotated by an operation of the rotation operation unit, and is rotated by a rotation stop means for a predetermined rotation. The gist is that it is stopped at the moving position.
In such a configuration, when the drive recorder is attached via the fixing means, the photographing lens is set at a predetermined elevation angle. With this operation, the acceleration sensor mounted on the mounting member is rotated in the same supine direction as the photographing lens by operating the rotation operation unit. Then, the rotation stop means is stopped at a predetermined rotation position, that is, a reference position where the speed sensor can detect a correct acceleration.
Here, the “reference position at which correct acceleration can be detected” means that the detection value of the speed sensor does not include a vertical component or has a very small vertical component that does not cause a malfunction. In addition, the “upward direction of the photographing lens” is generally a direction in which the photographing lens rotates vertically from the horizontal position. If adjustment of the elevation angle of the acceleration sensor is unnecessary, there is no need to operate with the default setting.
With such a configuration, even when the photographic lens of the drive recorder is placed upside down or down from the horizontal position, the acceleration sensor is rotated up regardless of the orientation of the photographic lens. Since the depression angle can be changed, it can be arranged at a reference position where a correct acceleration can be detected by the acceleration sensor alone. Then, the acceleration sensor can be stopped at such a position by the rotation stopping means.

The gist of the second means is that, in addition to the first means, the mounting member is a holder that does not expose the acceleration sensor to the outside but has a portion exposed to the outside.
That is, it is a more specific support structure of the mounting member. As a result, the acceleration sensor is not exposed but protected by the holder, and the holder itself is exposed to the outside, so that the operation can be performed by directly accessing the holder.

The gist of the third means is that, in addition to the second means, a portion exposed to the outside of the holder also serves as the rotation operation portion.
In such a configuration, the holder itself can be rotated and the outer surface thereof can be operated with a finger to rotate the holder in the supine direction, whereby the elevation angle of the acceleration sensor can be adjusted. Moreover, it is not necessary to provide a separate rotation operation unit by using the holder itself as the rotation operation unit.

In the fourth means, in addition to the third means, the outer surface of the holder is configured as a curved surface that is convex outward, and the curved surface is formed with a non-slip that is uneven in the rotational direction. The gist.
With such a configuration, since the rotation operation part is a curved surface that protrudes outward, it can be stored compactly so that only the curved surface of the holder is exposed in the main body case, and when it is further rotated, there is no slip. Therefore, it is easy to operate.

In the fifth means, in addition to the fourth means, the rotation stopping means is constituted by an engagement relationship between the uneven shape of the anti-slip and an elastic engaging claw formed on the main body case side, The engagement claw held in the first concave position of the anti-slip is held in the first concave position when a rotational torque of a predetermined level or higher is not applied to the holder, and a rotational torque of a predetermined level or higher is applied. The gist of the present invention is that it can be bent and moved from the concave position of the engaging claw to the adjacent second concave position over the convex shape.
In such a configuration, the concave / convex shape of the curved surface that also serves as an anti-slip becomes an engaging portion as a rotation stopping means, and engages with an engaging claw formed on the main body case side, thereby holding the holder at a predetermined rotating position. Therefore, the number of members can be reduced and the cost can be reduced, and a holder rotation stop mechanism can be provided in the main body case having a space limitation. Moreover, it contributes to downsizing the main body case.

In the sixth means, in addition to any one of the second to fifth means, the outer surface of the holder is arranged at a position indicating a horizontal position when the acceleration sensor is arranged at a reference position that can be detected in a horizontal state. The gist is that an indicator is formed.
This makes it possible to visually recognize whether or not the acceleration sensor is in a horizontal state.

The gist of the seventh means is that, in addition to any one of the second to sixth means, there is provided restriction means for restricting the rotation range of the holder to a predetermined range within 360 degrees.
From the acceleration sensor mounted on the holder, a cable such as a data line or a power supply line will be extended to the board in the main body case. However, if the holder rotates freely, the cable will be damaged. There is also a case. In this manner, the cable is protected by restricting the rotation of the holder. Note that the rotation range of the holder is preferably a swing range that does not expose the acceleration sensor supported inside the holder to the outside.

In the eighth means, in addition to any one of the first to seventh means, the main body case can be rotated in a direction to change the elevation angle of the photographing lens with respect to the fixing means, and can be arbitrarily set by the holding means. The gist is to be held at the rotational position.
In such a configuration, when the drive recorder is attached via the fixing means, the drive recorder is rotated in a direction to change the elevation angle of the main body case with respect to the fixing means, and is held by the holding means at an arbitrary rotation position. The photographing lens can be set at an arbitrary elevation angle.

In the ninth means, in addition to the first means, the main body case is composed of a plurality of sub cases, and the first sub case in which the photographing lens is disposed in the sub case, and the acceleration sensor The gist of the present invention is that the second sub case as the mounting member on which is mounted is relatively rotatable.
This configuration shows a specific configuration by the acceleration sensor (the mounting member) rotating separately from the photographing lens. Thus, after the main body case is attached by the fixing means, the second sub case can be rotated with respect to the first sub case so that the acceleration sensor can be adjusted to a reference position at which correct acceleration can be detected.

In the tenth means, in addition to the first means, the main body case includes a plurality of sub cases, and the first sub case in which the photographing lens is disposed in the sub case, and the acceleration sensor The second sub-case as the mounting member on which is mounted and the third sub-case in which the operation portion is disposed are connected in series and at the center of any of the first to third sub-cases The gist of the invention is that what is arranged on both sides is relatively rotatable with respect to what is arranged.
As with the ninth means, the acceleration sensor (where the mounting member) rotates separately from the photographing lens shows a more specific configuration. Thus, after the main body case is attached by the fixing means, the second sub case is rotated with respect to the first or third sub case so that the acceleration sensor is adjusted to a reference position at which correct acceleration can be detected. Can do. It is also possible to turn the second sub case while turning the shooting lens in the optimal direction and further in the direction in which the operation unit is easy to operate, so the main mechanism of the drive recorder can be easily optimized. It is possible to arrange in a simple state.

  According to the first to tenth aspects of the present invention, even when the photographing lens of the drive recorder is placed upside down or down from the horizontal position, the acceleration sensor is independent of the orientation of the photographing lens. Since the elevation angle can be changed by turning, the acceleration sensor can be disposed at a reference position where correct acceleration can be detected by the acceleration sensor alone.

(A) And (b) is a perspective view of the drive recorder of Example 1 concerning this invention, respectively. FIG. 3 is a plan view of the drive recorder according to the first embodiment. FIG. 3 is an exploded perspective view of the drive recorder according to the first embodiment. (A)-(c) is explanatory drawing explaining the state which mounted | wore the windshield of the different vehicle with the drive recorder of Example 1. FIG. (A) And (b) is a perspective view of the imaging mechanism inside the drive recorder of Example 1. FIG. Explanatory drawing explaining collating the imaging | photography mechanism inside the drive recorder of Example 1 from a side surface direction with the positional relationship with respect to a main body case. (a) is a perspective view of a holder on which an acceleration sensor is mounted, (b) is an exploded view of the same holder, and (c) is a perspective view from the back of the same holder. (A) And (b) is explanatory drawing explaining the mounting direction of components, such as a holder from the surface of a 1st case piece, and a back surface. The back side front view of the 1st case piece. (A) is sectional drawing in the AA line of FIG. 9, (b) is sectional drawing in the BB line of FIG. The back side perspective view of the 2nd case piece. (A)-(c) is explanatory drawing explaining the rotation operation | movement in the holder mounting part of a holder. (a) And (b) is explanatory drawing explaining the engagement relationship between the engaging claw at the time of rotating a holder main body, the protruding item | line of a slip stopper, and a ditch | groove. (A) And (b) is a perspective view of the drive recorder of Example 2 concerning this invention, respectively. The front view which illustrated the drive recorder of Example 2 typically. Explanatory drawing explaining the rotation mechanism of the drive recorder of Example 2. FIG. The perspective view of the sub case of Example 2. FIG. (A) is explanatory drawing explaining the state which an acceleration sensor detects a horizontal direction correctly, (b) is explanatory drawing explaining the state where the acceleration sensor inclined and the vertical component was included in the actual horizontal direction.

A drive recorder that is Embodiment 1 of the present invention will be described below with reference to the drawings.
First, a schematic configuration of the drive recorder will be described with reference to FIGS. The external appearance of the drive recorder 1 of the first embodiment is composed of a main body case 2, a mounting bracket 3 attached to the outer periphery of the main body case 2, and a cap 4 for fixing the mounting bracket 3 to the main body case 2. . The main body case 2 is configured by combining a pair of front and rear first and second case pieces 2a and 2b. As shown in FIGS. 8 and 11, the case pieces 2a and 2b are substantially symmetrical with each other, and the photographing mechanism accommodating portion 5A is formed with an equal width in the longitudinal direction in a state in which the main body case 2 is constructed by combination. And a support portion 5B that is larger than the outer dimension of the imaging mechanism housing portion 5A and bulges into a substantially cylindrical shape on one end side of the imaging mechanism housing portion 5A. A photographing mechanism such as a CCD camera described later is accommodated in the photographing mechanism accommodating portion 5A.
A holder 6, first and second push buttons 8 and 9, and first and second pilot lamp illumination blocks 10 and 11 are provided on a wall portion 6 A constituting the imaging mechanism housing portion 5 A of the first case piece 2 a. It is arranged. These holders 7 will be described in detail later. The lens 14 of the CCD camera 13 is disposed on the wall portion 6B of the second case piece 2b constituting the photographing mechanism accommodating portion 5A so that the lens 14 of the CCD camera 13 is exposed from the lens through hole 12. The configuration of the first and second case pieces 2a and 2b and the configuration of the photographing mechanism such as the CCD camera 13 accommodated in the main body case 2 will be described in detail later.

As shown in FIGS. 1 to 4, the mounting bracket 3 includes a ring portion 15, a support leg 16 protruding outward from a part of the outer periphery of the ring portion 15, and a mounting plate formed on the upper end of the support leg 16. 17. On one end face of the ring portion 15, a first meshing portion 15 a made up of a plurality of teeth of equal size is formed along the circumferential direction. The attachment surface 17a on the upper surface of the attachment plate 17 is configured as an inclined surface in which a tangential direction in contact with the outer periphery of the ring portion 15 is defined as a reference surface and the reference surface is inclined toward one side in the circumferential direction. As shown in FIGS. 1A and 3, a through hole 18 is formed in the center of the cap 4. An anti-slip 4 a is formed on the outer periphery of the cap 4, and an internal thread portion (not shown) is formed on the inner periphery. The outer diameter of the cap 4 substantially matches the outer diameter of the ring portion 15 of the mounting bracket 3.
On the other hand, the support portion 5B of the main body case 2 has a shape corresponding to the mounting bracket 3 and the cap 4 for mounting. As shown in FIG. 3, a first cylindrical portion 20, a second cylindrical portion 21, and a disc portion 22 are formed in order from the base side on the support portion 5 </ b> B. The first cylindrical portion 20 having the largest diameter close to the photographing mechanism housing portion 5A is formed to have the same width and the same diameter as the ring portion 15 of the mounting bracket 3 (actually a small diameter because the ring portion 15 is fitted). A second meshing portion 20a corresponding to the first meshing portion 15a is formed on the entire circumference of the base position. On the outer periphery of the second cylindrical portion 21, a male screw portion 21 a is formed to which the female screw portion of the cap 4 is screwed. The disk portion 22 is an exposed surface on the left side surface of the main body case 2, and an insertion hole 23 for a DC power jack is formed.

The mounting bracket 3 is attached to the main body case 2 (the support portion 5B) as follows.
The mounting bracket 3 allows the ring portion 15 to be fitted to the first cylindrical portion 20 from the distal direction (the disc portion 22 side), and the first meshing portion 15a and the second meshing portion 20a are connected. It arrange | positions in the arbitrary arbitrary circumferential direction positions with respect to the main body case 2 so that it may mesh | engage. Next, the cap 4 is similarly attached to the second cylindrical portion 21 from the distal direction. The cap 4 is screwed into the second cylindrical portion 21 in the relationship between the female screw portion and the male screw portion 21a, and the ring portion 15 of the mounting bracket 3 is pressed from the end surface side to attach the mounting bracket to the main body case 2. 3 is fixed. FIG. 1A shows a state in which the cap 4 is completely attached to the second cylindrical portion 21. In this state, the disk portion 22 is exposed from the through hole 18 of the cap 4, and the front surface of the disk portion 22 and the upper surface of the cap 4 are substantially flush with each other.
If such a mounting bracket 3 is used, when the orientation of the body case 2 is kept constant and the axis passing through the geometric center of the camera lens 14 is to be arranged in a certain direction (here, the front horizontal direction), for example, As shown in FIGS. 4 (a) and 4 (b), even when the angle of the windshield of the vehicle is different, the rotation position of the mounting bracket 3 with respect to the body case 2 is changed according to the angle, and the body case The direction of 2 can be kept constant.

Next, the structure of the first case piece 2a in the main body case 2 and the holder 7, the first and second push buttons 8, 9 and the first and second pilots arranged on the first case piece 2a. The configuration of the lamp illumination blocks 10 and 11 will be described in detail.
As shown in FIGS. 7A to 7C, the holder 7 includes a holder body 30 and a pair of bearings 31 that support the holder body 30 from both sides. As shown in FIGS. 7B and 12, the holder body 30 is an integrally molded plastic part having a semicircular cross-sectional shape that has a semi-cylindrical appearance with a plate, and is made of a curved plate. It is comprised from the shaft part 33 of the both ends of the operation part 32 and the rotation operation part 32. FIG. On the surface of the rotation operation unit 32, a non-slip 34 is formed which is formed of ridges and grooves that are uneven in the rotation direction. At the center position in the rotation direction of the anti-slip 34, an indicator 34a is formed which is formed by protruding ridges and grooves different from the other ridges and grooves. The inside of the concave groove of the indicator 34a is colored white so that it can be easily seen. The pair of shaft plates 33 are formed with engaging claws 35 having elasticity so that the tips of the claws are arranged opposite to each other. A rotating shaft 36 is formed on the outer surface of each shaft plate 33 at a coaxial position. A restriction groove 37 is formed at the outer surface position of each shaft plate 33 so as to surround the rotation shaft 36.
The pair of bearings 31 includes a head 38 having a contour corresponding to the contour shape of the shaft plate 33. The inner surface of the head 38 is a flat contact surface 38 a and is in contact with the outer surface of the shaft plate 33. Each contact surface 38 a is formed with a ridge 39 and is fitted in the restriction groove 37 of the shaft plate 33. The total length of the ridge 39 is configured to be shorter than the total length of the restriction groove 37. The total length difference between the ridge 39 and the regulation groove 37 corresponds to the rotation amount. The ridge 39 and the regulation groove 37 constitute a regulation means. An engagement groove 41 is formed on the lower surface of the head 38, and the rotation shaft 36 of the shaft plate 33 is engaged. A pair of screw taps 40 is formed from the head 38 toward the lower surface.
Since the holder main body 30 and the pair of bearings 31 have such a configuration, the bearing 31 and the holder main body 30 are relatively rotatable with the rotation shaft 36 as a rotation base, and the ridge 39 and the restriction groove are provided. The relative rotation is restricted to a predetermined rotation range by the fitting relationship with 37.

As shown in FIG. 7C, the acceleration sensor 43 is supported by the engaging claws 35 of the biaxial plates 33. The acceleration sensor 43 is mounted while the opposing engaging claws 35 of the shaft plate 33 are bent outward. In the first embodiment, as shown in FIGS. 12A and 12C, the acceleration sensor 43 always detects the correct acceleration when the index 34a visually observed on the surface of the rotation operation unit 32 is in the horizontal position. It is set as a reference position where
As shown in FIGS. 6 and 8 (b), the first and second push buttons 8, 9 and the first and second pilot lamp illumination blocks 10, 11 as the operation unit and the display unit are made of silicone rubber. The first and second push buttons 8 and 9 having a rectangular parallelepiped shape arranged in the horizontal direction are colored, and the first and second push buttons 8 and 9 having a rectangular parallelepiped shape arranged in the vertical direction are integrally formed. The pilot lamp illumination blocks 10, 11 are translucent. The first push button 8 is an input unit used for SD card formatting, and the second push button 9 is an input unit used when storing a photographed image. The first pilot lamp illumination block Reference numeral 10 denotes a pilot lamp illumination block that emits light when a captured image is stored, and a second pilot lamp illumination block 11 includes a pilot lamp illumination block that emits light in a mode in which the captured image is overwritten on the SD card. Is done.

As shown in FIGS. 8 to 10, the first case piece 2a is in a half-split state for forming the photographing mechanism housing portion 5A and the support portion 5B in cooperation with the second case piece 2b as described above. It is a molded product made of plastic. On the inner surface (back surface) of the first case piece 2a, a screw tap 25 and a support protrusion 26 for holding the internal mechanism are formed near the periphery. In addition, engaging claws 27 that are engaged with the second case piece 2b are formed at six locations arranged in a scattered manner near the periphery.
A holder 7, first and second push buttons 8 and 9, and pilot lamp illumination blocks 10 and 11 are disposed on the wall 6 </ b> A. A mounting structure for mounting the holder 7 and the like on the inside and outside of the wall portion 6A is formed by integral molding. Hereinafter, the mounting structure will be described.
As shown in FIGS. 8A, 8B, 9, and 10A, 10B, the holder mounting portion 44 is formed at a through hole 45 communicating from the front surface side to the back surface side, and at both side positions of the through hole 45. It is comprised from the main body side bearing 46 made. The bearing 31 of the holder 7 is attached to the main body side bearing 46, and the holder main body 30 faces the through hole 45 in a state where the holder 7 is mounted.
The support surfaces for supporting the main body side bearings 46 of both the main body side bearings 46 are disposed at positions slightly lower (about 2 mm as actual size) from the surface surfaces (icicles) on the surface side of the wall portion 6A. Each main body side bearing 46 is formed with a cylindrical portion 47 that communicates from the two front surfaces to the rear surface. An engaging groove 48 is formed between the adjacent cylindrical portions 47.
As shown in FIG. 10 (b), the upper and lower positions of the through-hole 45 are recessed inwardly toward each other so as to gradually narrow the vertical width of the through-hole 45 from the front side to the back side of the wall 6A. First and second skirts 50 and 51 are formed. As shown in FIGS. 9, 10 (a) and 10 (b) and FIGS. 12 (a) to 12 (c), the lower second skirt 51 has an elastic engaging claw 53 facing upward. Is formed.

The holder 7 is mounted on the holder mounting portion 44 as follows.
The holder 7 (the state shown in FIG. 7A) in which the holder main body 30 on which the acceleration sensor 43 is mounted is sandwiched from both sides by the bearings 31 is the same as that of the first case piece 2a as shown in FIGS. The bearing 31 of the holder 7 is brought into contact with the main body side bearing 46 from the surface. At this time, since the main body side bearing 46 is slightly lowered from the surface (icicle) of the surface of the wall portion 6A as described above, it is easy to position. Then, the screw taps 40 of the left and right bearings 31 are inserted into the corresponding cylindrical portions 47 of the main body side bearings 46, respectively. Next, the bearing 31 is fixed to the main body side bearing 46 with screws 52 from the back side. At this time, the rotation shaft 36 protruding left and right from the holder main body 30 is rotatably surrounded by both the main body side bearing 46 and the engagement grooves 41 and 48 of the main body side bearing 46.
In this fixed position, the holder main body 30 is stabilized by the engagement claw 53 being engaged with the concave groove side of the anti-slip 34 of the rotation operation portion 32 of the holder main body 30 as shown in FIG. This is because the shape of the front end of the engaging claw 53 and the cross-sectional shape of the concave groove are fitted in an uneven relationship. The engagement claw 53 and the anti-slip 34 constitute a rotation stop means.
The holder body 30 is rotated about half as shown in FIGS. 12A to 12C while the rotation of the holder body 30 is restricted by the fitting relationship between the ridge 39 and the restriction groove 37 with respect to the fixed bearing 31. The part 32 can be rotated in a state where the part 32 is always exposed on the surface side. When the holder body 30 is rotated, the first and second skirts 50 and 51 are curved in accordance with the curved shape of the rotation operation unit 32, so that the first and second skirts 50 and 51 are within the rotation range of the holder body 30. There is no interference with the skirts 50 and 51 of the present invention. Note that data lines, power lines, and the like are wired from the acceleration sensor 43 to the sub-board 75 described later. However, since the rotation is restricted in this way, it is difficult for the wiring to have a problem with the rotation. ing.

  A rotational torque is applied to the holder body 30 in a state where the holder 7 is mounted on the holder mounting portion 44. That is, the engaging claw 53 is bent by forcibly rotating the holder main body 30 with a finger or the like by rubbing the rotation operation unit 32 and overcoming the ridge from the state of FIG. It is related and actually approaches the engaging claw 53 on the ridge side) (in the direction of the adjacent groove). In this way, the holder main body 30 can be moved to an arbitrary rotational position by applying a predetermined rotational torque, and is newly held by engagement of the engaging claw 53 and the groove at that position. . Here, as shown in FIGS. 13 (a) and 13 (b), the shape of the engaging claw 53 tip and the recessed groove is composed of inclined surfaces with uniform inclination on both sides, and therefore the same in both forward and reverse directions. It can be rotated by torque.

As shown in FIGS. 8A, 8B, 9, and 10A, B, the first and second push buttons 8, 9 and the first and second pilot lamp illumination blocks 10, Through holes 54a to 54d are formed at the position of the wall portion 6A where 11 is mounted. A storage shelf 55 is formed on the back side of the wall 6A corresponding to the through holes 54a to 54d, and the first and second push buttons 8, 9 and the first and second pilots integrated with each other. The lamp illumination blocks 10 and 11 are accommodated from the back side. As shown in FIGS. 1B, 8A, and 8B, on the side of the holder mounting portion 44 and the through holes 54a to 54d, on the wall portion that constitutes the end surface of the photographing mechanism accommodating portion 5A. Is formed with an insertion slot 57 for inserting an SD card.
Next, the configuration of the second case piece 2b in the main body case 2 will be described.
As shown in FIG. 11, the second case piece 2b is made of a plastic in a half-divided state for constituting the photographing mechanism accommodating portion 5A and the support portion 5B in cooperation with the first case piece 2a as described above. It is a molded body. Similar to the first case piece 2a, a support protrusion 60 for holding the internal mechanism is formed. Locking recesses 61 with which the engaging claws 27 on the first case piece 2a side are engaged are formed at six positions on the inner surface (back surface) of the second case piece 2b and closer to the periphery. A small through hole group 62 for heat dissipation is formed below the second case piece 2b. A lens mount 63 is fixed to the lens through-hole 12 position of the wall portion 6B by screws 66 from the back side. A GPS mount 65 for holding a GPS receiver described later is formed at an inner position adjacent to the lens through hole 12.

Next, the configuration of the photographing mechanism such as the CCD camera 13 housed in the main body case 2 will be described.
As shown in FIG. 6, a photographing mechanism 71 is disposed in the main body case 2. As shown in FIGS. 5A and 5B, the CCD camera 13, the GPS receiver 74, the DC jack 75, the power supply circuit, and the like are mounted on the main board 72 constituting the photographing mechanism 71. A sub board 76 is disposed on the main board 72 in an overlapping manner. The acceleration sensor 43 is connected to the sub board 76. Further, switches 77 and 78 are arranged at positions corresponding to the first and second push buttons 8 and 9, and LEDs 79 and 80 corresponding to the first and second pilot lamp illumination blocks 10 and 11 are arranged. ing. An SD card reader 81 is disposed between the main board 72 and the sub board 76. The slot 81 a of the SD card reader 81 is arranged facing the insertion slot 57.

Next, the operation of the drive recorder 1 configured as described above will be described.
As shown in FIGS. 4A to 4C, the drive recorder 1 is mounted on the windshield of the vehicle. In the case where the lens direction (the direction of the axis passing through the geometric center of the lens 14) is oriented horizontally as shown in FIGS. 4 (a) and 4 (b), the acceleration sensor always mounted as shown in FIG. 12 (a). 43 is used at a horizontal position as a reference.
On the other hand, as shown in FIG. 4C, there is a case where it is desired to change the angle largely with respect to the horizontal position as a reference. For example, in a large vehicle such as a truck or bus with a high boarding position, an accident such as a collision occurs almost at a position looking down from the upper boarding position. Therefore, set the lens itself so that it faces downward instead of the front. There is a need to.
In such a case, the user operates the holder 7 on which the acceleration sensor 43 is mounted, and the acceleration sensor 43 is arranged at a reference horizontal position. More specifically, the acceleration sensor 43 is corrected to the reference horizontal position by rotating the holder body 30 of the holder 7 by an angle in which the direction of the lens is directed downward with respect to the horizontal direction.
For example, the holder main body 30 is attached to the main body case 2 in the posture as shown in FIG. 12A, and if it is tilted greatly as shown in FIG. 4C, the acceleration sensor 43 is shown in FIG. 12B. Is disposed with a large inclination from the reference position. Accordingly, the acceleration sensor 43 can detect the correct acceleration by rotating the holder body 30 as shown in FIG. 12C in accordance with the angle at which the body case 2 is swung downward with respect to the horizontal direction. Place it at the reference position. This operation is an example, and the orientation of the lens can be changed after the holder body 30 is first rotated.
An index 34a that can indicate a horizontal position serving as a reference for the acceleration sensor 43 is disposed on the outer periphery of the holder body 30. When the index 34a is in the horizontal position, a reference position that can detect a correct acceleration is provided. Therefore, in the first embodiment, the holder main body 30 is rotated so that the indicator 34a is visually observed and is directed in the horizontal direction.

The drive recorder 1 according to the first embodiment configured as described above has the following effects.
(1) The acceleration sensor in the main body case is tilted when the main body case is largely swung up and down with the axis passing through the geometric center of the lens facing the horizontal direction as a reference and the direction of the lens is greatly changed. Thus, although accurate detection is hindered, the holder body 30 on which the acceleration sensor 43 is mounted is set to the swing position (tilt) of the body case 2 regardless of the direction of the lens as in the first embodiment. Accordingly, the inclination of the acceleration sensor 43 can be appropriately corrected and set at the reference position, so that the detection of the drive recorder 1 is not hindered.
(2) Since the anti-slip 34 is formed when the holder main body 30 of the holder on which the acceleration sensor 43 is mounted is formed, it is hard to slip and easy to operate. Moreover, it is not necessary to provide a separate rotation operation unit by using the holder body 30 as a rotation operation unit.
(3) Since the index 34a is formed on the outer periphery of the holder main body 30, the position of the holder main body 30 can be easily determined using the index 34a as an index so that the acceleration sensor 43 becomes the reference position.
(4) Since the rotation of the holder main body 30 is not in a free state but is provided with a rotation stop means and is held at a predetermined rotation position, the rotation position once set may be easily shifted. Absent. Further, in the first embodiment, the rotation stopping means is specifically realized by the concave and convex shapes on the outer periphery of the engaging claw 53 and the anti-slip 34, so the number of members is reduced and the cost is reduced.

(Example 2)
Next, Example 2 will be described. In the second embodiment, only the configuration different from that of the first embodiment will be described, and the description of the basically same configuration, operation, and effect as the first embodiment will be omitted. In addition, although the configuration is different from that of the first embodiment, the description of the similar mechanism described in the first embodiment is omitted.
As shown in FIGS. 14 (a) and 14 (b), the main body case of the drive recorder 81 of the second embodiment is composed of three sub cases 82, 83, 84 arranged in series. The first to third sub cases 82, 83, 84 are plastic case bodies configured separately, and each of the sub cases 82, 83, 84 has a pair of front and rear halved first and second parts. The case pieces 91 and 92 are combined. As shown in FIG. 17, each of the sub cases 82, 83, 84 has a cylindrical shape including a top plate 95 and a bottom plate 96 having a through hole 93 formed in the center in a combined state.
As shown in FIG. 15, the acceleration sensor 43 is built in the first sub case 82 disposed at a position adjacent to the mounting bracket 3. A horizontal line 88 serving as an index that can indicate the horizontal position serving as a reference for the acceleration sensor 43 is provided on the outer periphery of the first sub case 82, and a correct acceleration is obtained when the line 88 is in the horizontal position. It is set as a reference position where can be detected. First and second push buttons 8 and 9 and first and second pilot lamp illumination blocks 10 and 11 are arranged in the second sub case 83 arranged in the center. In the second sub case 83, a main board and a sub board (not shown) are arranged. The CCD camera 13 is disposed in the third sub case 84 that is disposed farthest from the mounting bracket 3.
In the second embodiment, a portion where the mounting bracket 3 is supported is a support portion 85 that is separate from the first sub case 82.

As shown in FIG. 16, the first to third sub cases 82, 83, 84 are individually attached to the main shaft 86 extending from the support portion 85 so as to be rotatable. The first to third sub cases 82, 83, 84 are pivotally supported with respect to the main shaft 86, respectively, and a constant rotational torque is provided by a gear mechanism 87 provided in the sub cases 82, 83, 84. With the above rotational force, the main shaft 86 is reciprocally rotated around the main shaft 86 and is held at a predetermined rotation position. In the second embodiment, the wiring necessary between the first to third sub cases 82, 83, 84 is not shown, but by wiring through the main shaft 86, the wiring between the sub cases 82, 83, 84 is omitted. It is possible to rotate without worrying about the wiring state.
With such a configuration, the first sub case 82 and the third sub case 84 can be separately rotated. For example, after the drive recorder 81 is attached to the windshield of the vehicle, The sub case 82 is rotated and set to a position where the acceleration sensor 43 correctly detects (the line 88 is a horizontal position), and then the third sub case 84 is directed to the supine direction as necessary.
In such a configuration, the first sub case 81 can be rotated and the acceleration sensor 43 can be set correctly regardless of the direction of the lens, as in the first embodiment, so that the detection of the drive recorder 81 may be hindered. Absent. Further, depending on the angle of the windshield, there are cases where the operation unit and the display unit such as the first and second push buttons 8 and 9 do not face the driver. Even after 83 is installed with the drive recorder 81, the direction can be changed by rotating the drive recorder 81 independently.

The present invention may be embodied in the following manner.
The acceleration sensor 43 may have a direction in which the acceleration is detected as a direction passing through the center of the main shaft 86 from the point on the line 88 on the diameter of the first sub case 82. Further, the acceleration sensor 43 may be disposed at the center of the main shaft 86, for example.
The form of the index may be a design other than the index 34a.
-The shape of the anti-slip 34 may be other than the above.
-In Example 2, although the main body case was comprised by the 1st-3rd subcase 82,83,84, you may comprise this by 2 or 4 or more.
A monitor may be provided as the display unit.
-You may apply to the drive recorder which uses other than SD card as a storage medium of a picked-up image.
In addition, the present invention can be freely implemented in a modified form without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1,81 ... Drive recorder, 2 ... Main body case, 3 ... Mounting bracket as fixing means, 4 ... Holder as mounting member, 32 ... Turning operation part, 34 ... Anti-slip as turning stop means, 43 ... Acceleration Sensor, 53... Engaging claw as rotation stopping means.

Claims (10)

It is attached to the inside of the vehicle through a fixing means so as to photograph the front through the windshield by the photographing lens exposed from the main body case, and the acceleration sensor detects an acceleration of a certain value or more as a trigger from the photographing lens. In the drive recorder that stores the image data of the time zone before and after that including the time zone at which the acquired predetermined acceleration is detected,
The acceleration sensor is mounted on a mounting member and is supported so as to rotate in the same direction as the supine direction of the photographing lens. The mounting member is rotated by an operation of a rotation operation unit, and rotation stopping means A drive recorder characterized by being stopped at a predetermined rotational position. 2. The drive recorder according to claim 1, wherein the mounting member is a holder having a portion exposed to the outside without exposing the acceleration sensor to the outside. The drive recorder according to claim 2, wherein a portion exposed to the outside of the holder also serves as the rotation operation unit. The drive recorder according to claim 3, wherein the outer surface of the holder is configured as a curved surface that protrudes outward, and the curved surface is formed with a non-slip stopper that is concave and convex in the rotational direction. The rotation stopping means is configured by an engagement relationship between the uneven shape of the anti-slip and an elastic engaging claw formed on the main body case side, and is an engagement held at the first concave position of the anti-slip. The claw is held in the first concave position when a predetermined or higher rotational torque is not applied to the holder, and bends and protrudes from the concave position of the engaging claw when a predetermined or higher rotational torque is applied. The drive recorder according to claim 4, wherein the drive recorder is movable in the direction of the second concave position adjacent to the shape. 6. An indicator arranged at a position indicating a horizontal position when the acceleration sensor is arranged at a reference position that can be detected in a horizontal state is formed on the outer surface of the holder. Crab drive recorder. The drive recorder according to any one of claims 2 to 6, further comprising a restricting means for restricting a rotation range of the holder to a predetermined range within 360 degrees. 8. The main body case is rotatable in a direction to change an elevation angle of the photographing lens with respect to the fixing means, and is held at an arbitrary rotation position by a holding means. The drive recorder in any one of. The main body case includes a plurality of sub cases, and a first sub case in which the photographing lens is disposed in the sub case, and a second sub as the mounting member on which the acceleration sensor is mounted. The drive recorder according to claim 1, wherein the case is relatively rotatable. The main body case includes a plurality of sub cases, and a first sub case in which the photographing lens is disposed in the sub case, and a second sub as the mounting member on which the acceleration sensor is mounted. The case and the third sub case in which the operation unit is arranged are connected in series and are arranged on both sides of the first to third sub cases which are arranged in the center. 2. The drive recorder according to claim 1, wherein the one is relatively rotatable.

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