JP6584272B2 - Pan head device - Google Patents

Description

  The present invention relates to a pan / tilt head device capable of imaging by rotating a housing by tilting.

  Conventionally, a pan / tilt head device that tilts by housing an electronic device such as a camera in the housing is heated by the heat generated by the device in the housing or the outside air temperature rises. There was a problem of exceeding. In order to reduce the temperature rise inside the housing, a pan head device in which a ventilation hole is provided in the housing is known (Patent Document 1).

JP 2004-96571 A

  However, in Patent Document 1, since the vent hole is fixed to the housing, the opening direction of the vent hole changes with tilting of the housing, and depending on the tilt angle, the vent hole is likely to be exposed to raindrops. Waterproof performance may be reduced.

  An object of the present invention is to provide a pan / tilt head device that can suppress a decrease in waterproof performance even when a housing is tilted.

  In order to achieve the above object, a pan head device according to the present invention includes a housing that houses an imaging device and is rotatable around a first rotation axis for tilting, and a first device provided inside the housing. A communication means that communicates between the inside and the outside of the housing, and a second hole that is provided on the outside of the housing and that is provided on the outside of the housing and that is lower than the first hole in the direction of gravity. Rotating means for rotating the end of the hole about a second rotation axis parallel to the first rotation axis so as to be opposite to the rotation direction of the first rotation axis. It is characterized by.

  According to the present invention, even if the housing is tilted, it is possible to suppress a decrease in waterproof performance.

The figure which shows the outline | summary of the pan head apparatus which concerns on the 1st Embodiment of this invention. Sectional drawing of the tube unit in 1st Embodiment The figure which shows the time of the housing tilting in 1st Embodiment. The figure which shows the time of comprising a cover member in the pipe unit in 1st Embodiment. The figure which shows the outline | summary of the pan head apparatus which concerns on 2nd Embodiment. Detailed view of weight unit in the second embodiment Sectional drawing of the weight unit in 2nd Embodiment The figure which shows the time of the housing tilting in 2nd Embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the X direction is the optical axis direction of the imaging optical system when the imaging device is in the basic posture, the Y direction is the left-right direction when the imaging device is in the basic posture, and the Z direction is the imaging device in the basic posture. The vertical direction (height direction) is shown.

<< First Embodiment >>
(Pant head device)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a diagram showing an overview of a pan head device 1 in the present embodiment. The pan head device 1 mainly includes a housing 2, a head 3, and a pedestal 4. The housing 2 accommodates the imaging device 14, and the imaging device 14 captures (captures) a subject through a protective glass 2a provided on the end surface of the housing.

  The head 3 is provided with a drive unit for driving pan and tilt (not shown). By this drive unit, the housing 2 tilts in the direction of arrow T about the tilt rotation shaft 3a, and the head 2 pans in the direction of arrow P.

(Rotation of communication means in the opposite direction to tilting)
FIG. 2 is a cross-sectional view taken along line AA of the tube unit 5 shown in FIG. 1, and shows a cross section viewed from the side opposite to the incident side in the optical axis direction (X direction). In FIG. 2, a tube unit 5 is disposed on the housing wall surface of the housing 2, and a hole 2c is formed in the wall surface 2b of the housing 2 in the Y direction parallel to (including substantially parallel to) the tilt rotation shaft 3a. And communicated with the outside. A bearing member 7 such as a bearing or a bush is fitted into the hole 2c, and a tube 6 is inserted into the inner diameter of the bearing member 7, and the tube 6 can rotate about the rotation shaft 6d. .

  A hole 6a that is a first hole provided inside the housing 2 and a hole 6b that is provided on the outside of the housing 2 and is a second hole below the hole 6a in the direction of gravity with respect to the hole 6a. The tube 6 as a communication means for communicating the inside and the outside has the following shape. That is, the tube 6 has a hollow cylindrical shape, and has an L shape having at least one bending point 6c in the longitudinal direction of the cylinder. The holes 6a as the first holes and the holes 6b as the second holes are communicated with each other so that the inside and the outside of the housing 2 are ventilated.

  Here, a weight member 8 is attached to a substantially distal end 6c inside the housing of the tube 6 with a fastening member 9 such as a screw in a state where the tube 6 is inserted into the hole 8a. That is, the weight member 8 and the tube 6 as the communication means are integrated, and can be rotated around the rotation shaft 6d. The weight member 8 is shaped so that its gravity center position 8b is eccentric with respect to the rotation shaft 6d in the direction of gravity. In addition, the tube 6 is arranged so that the eccentric direction of the end of the hole 6b outside the housing and the center of gravity 8b with respect to the rotation axis 6d coincides with the direction of gravity.

  In FIG. 2, the plate 10 has a hollow cylindrical shape, and is fixed to the inside of the housing 2 with a fastening member 15 such as a screw to suppress the play in the thrust direction of the bearing member 7. The plate 11 has a hollow cylindrical shape having a flange portion 11a, and is fixed to the outside of the housing 2 by a fastening member 16 such as a screw, and the waterproof seal 12 is fixed by the flange portion 11a. And in order to suppress the backlash of the pipe 6 in the thrust direction, a thrust suppressing member 18 such as an e-ring or a washer is provided at both ends of the pipe 6, and the thrust suppressing member 18 is a recess provided on the outer surface of the pipe 6. It is inserted in.

  With the above configuration, the weight member 8 functions as a rotating unit that rotates the tube 6 in the direction opposite to the rotation direction about the tilt rotation shaft 3 a of the housing 2. The hole 6b always faces in the direction of gravity regardless of the tilt angle. For example, as shown in FIG. 3, even when the housing 2 is tilted, the hole 6b is always directed in the direction of gravity due to the acting force of the weight member 8, so that the waterproof performance is prevented from deteriorating.

(Modification in the first embodiment)
FIG. 4 shows a configuration in which a cover member 13 is added to the tube unit 5 shown in FIG. The cover member 13 is fixed to the outside of the housing 2 with a fastening member 17 such as a screw so as to cover the hole 6 b of the tube 6. Here, the cover member 13 is provided with at least one or more holes 13a, and ventilation from the inside of the housing 2 to the holes 13a is possible. As a result, the intrusion of water from the downward direction such as during a rainstorm is further suppressed by the cover member 13.

  That is, the water from the downward direction such as during a rainstorm is basically prevented from entering by the cover member 13, and the water that has entered the cover member 13 does not accumulate inside, but drains in the direction of gravity through the hole 13a. Is done.

  In addition, although the pipe | tube 6 mentioned above was L-shaped, different shapes, such as J shape, may be sufficient. Moreover, although the pipe 6 is an integral part, the inside and outside of the housing 2 may be ventilated with a configuration in which two or more parts such as a pipe-shaped part and a block part provided with a hole are combined.

(Effect of this embodiment)
As described above, in the present embodiment, even when the housing 2 is tilted, the end of the hole 6b, which is a ventilation hole, is always held in the direction of gravity, so that the waterproof performance is prevented from being lowered.

<< Second Embodiment >>
Hereinafter, the second embodiment of the present invention will be described with reference to FIGS. In the first embodiment, the weight member is provided inside the housing. However, in this embodiment, the weight member is provided outside the housing. FIG. 5 is a diagram showing an outline of the pan / tilt head device 1 according to the second embodiment. In FIG. 5, a weight unit 30 is arranged on the housing wall surface of the housing 20, and FIG. 6 shows details of the weight unit 30 shown in FIG. FIG. 7 is a cross-sectional view taken along the line BB of the tube unit 30 shown in FIG. 6, and shows a cross section viewed from the side opposite to the incident side in the optical axis direction (X direction).

(Rotation of communication means in the opposite direction to tilting)
In FIG. 7, a wall 20 a of the housing 20 is provided with a hole 20 b as a first hole in the Y direction parallel to (including substantially parallel to) the tilt rotation shaft 3 a (FIG. 5). Further, a weight member 21 having a hollow portion 21a and a hole 21b as a second hole is provided outside the housing 20. Here, the weight member 21 in the weight unit 30 is connected to the housing 20 through the plate 22, the bearing 23, and the plate 24 so as to be rotatable around the rotation shaft 23a.

  In FIG. 7, the hollow part 21a is provided so as to communicate with the hole 20b and the hole 21b, and the inside and outside of the housing 20 can be ventilated through the hole 20b, the hollow part 21a, and the hole 21b. . Thus, in this embodiment, the hole 20b provided inside the housing 20 and the lower hole 21b provided in the gravity direction with respect to the hole 20b provided outside the housing 20 connect the inside and outside of the housing 20 to each other. It functions as a communication means that communicates.

  Here, the shape of the weight member 21 is taken into consideration so that the gravity center position 21c of the weight member 21 is in a positional relationship deviated in the gravity direction with respect to the rotation shaft 23a. In addition, the eccentric directions of the end of the hole 21b and the center of gravity 21c with respect to the rotation shaft 23a are both aligned with the direction of gravity.

  The outer ring of the bearing 23 is fitted to the fitting portion 21d of the weight member 21, and the bearing 23 and the weight member 21 are fixed by a fastening member 25 such as a screw. The inner ring side of the bearing 23 is fitted into the fitting portion 22 a of the plate 22, and the play in the thrust direction is suppressed by the plate 24. Further, the fastening member 26 fastens the plate 24 to the housing 20 through the hole of the plate 22.

  With the above configuration, the weight member 21 functions as a rotating unit that rotates the hole 21b in the direction opposite to the rotation direction around the tilt rotation shaft 3a of the housing 2. The hole 21b is always directed in the direction of gravity regardless of the tilt angle. For example, as shown in FIG. 8, even when the housing 20 is tilted, the hole 21 b is always directed in the direction of gravity due to the acting force of the weight member 21, and the waterproof performance is prevented from being lowered.

  Further, the hollow portion 21a of the weight member 21 has a function of reducing water intrusion into the housing 20 by retaining a certain amount of raindrops in the hollow portion 21a even when raindrops are flooded from the hole 21b during a heavy rain. ing.

(Effect of this embodiment)
As described above, in the present embodiment, even when the housing 20 is tilted, the end of the hole 21b that is a ventilation hole is always held in the direction of gravity, so that the waterproof performance is prevented from being lowered.

(Modification)
As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

(Modification 1)
In the above-described embodiment, the weight member is used as the rotating means for rotating the end of the hole provided outside the housing as a hole communicating the inside and outside of the housing in the direction opposite to the rotation direction by tilting. Is not limited to this. For example, instead of the weight member described above, a driving unit that is electrically driven to rotate in a direction opposite to the rotation direction by tilting in synchronization with the tilting may be provided, and this may be used as the rotation unit. Furthermore, an angle sensor for detecting the rotation angle of the housing by tilting is provided, and the driving means and the angle sensor that are driven to rotate in a direction opposite to the rotation direction by tilting in synchronization with the tilting are used as the rotation means. May function.

  In the embodiment described above, even if the housing is tilted, the end of the hole provided outside the housing as a hole communicating the inside and outside of the housing is always held in the direction of gravity. However, the present invention is not limited to this. I can't. The driving means for rotationally driving may be qualitatively controlled so as not to always incline at a constant angle but to simply hold it close to the direction of gravity. Further, by using the driving means and the angle sensor that rotate and drive, quantitative control is performed so as to always hold in the direction of gravity or in a direction inclined by a certain angle (for example, 10 degrees with respect to the direction of gravity). It may be a thing.

(Modification 2)
In the above-described embodiment, the hole provided in the housing as the first hole that communicates the inside and the outside of the housing coincides with the position of the rotation shaft of the rotating means that rotates in the direction opposite to the rotation direction by tilting. However, the present invention is not limited to this. The hole provided in the housing as the first hole that communicates the inside and the outside of the housing may be located away from the position of the rotating shaft of the rotating means that rotates in the direction opposite to the rotating direction by tilting.

1 .. pan head device 2.. Housing 3 a .. tilt rotation axis 6.. Tube 6a .. hole (first hole) 6 b .. hole (second hole) 6 d. Shaft, 8 ·· Weight member, 14 ·· Imaging device, 20b ·· Hole (first hole), 21 ·· Weight member, 21b ·· Hole (second hole), 23a ·· Rotating shaft

Claims (10)

A housing that houses the imaging device and is rotatable about a first axis of rotation for tilting;
A first hole provided in the housing; and a second hole provided in the exterior of the housing and lower than the first hole in a gravitational direction. The interior and the exterior of the housing communicate with each other. Communication means to
Rotating means for rotating the end of the second hole around a second rotation axis parallel to the first rotation axis so as to be in a direction opposite to the rotation direction by the first rotation axis;
A pan head device characterized by comprising:   2. The pan / tilt head device according to claim 1, wherein the rotating unit includes a weight member having a center of gravity provided at a position away from the second rotating shaft.   The pan head device according to claim 2, wherein the weight member is provided inside the housing.   4. The pan / tilt head device according to claim 1, wherein the first hole coincides with a position of the second rotation shaft. 5.   4. The pan / tilt head device according to claim 2, wherein the communication means is a tube, and the tube and the weight member are integrated.   6. The pan head apparatus according to claim 5, wherein the tube has an L shape or a J shape.   The pan head apparatus according to claim 2, wherein the weight member is provided outside the housing. The first hole coincides with the position of the second rotation axis;
The pan head device according to claim 7, wherein the second hole is provided in the weight member rotatable around the second rotation axis.   The pan / tilt head device according to claim 7 or 8, wherein the communication means includes a hollow portion.   The pan / tilt head device according to claim 1, further comprising a cover member fixed to the housing outside the housing.