JP3471337B2 - Camera housing - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera housing provided with a front window, and more particularly to a camera housing having a wiper mechanism.

[0002]

2. Description of the Related Art An outdoor video distribution system such as a surveillance camera installed outdoors has a deterioration in camera function and a malfunction due to stains such as rain dew, dust, flying insects, excrements of insects and birds. You A camera housing is provided to protect the camera body from these contaminants. Further, the camera housing includes a front window (also referred to as a camera window) formed of a transparent material so that the outside can be seen through from the camera. In order to remove dirt on the front window of the camera housing, a camera housing provided with, for example, a wiper mechanism has been proposed.

The conventional shape of the front window of the camera housing for an internal swivel camera has been flat or spherical. A camera housing having a wiper device for removing dirt along the plane or spherical surface is known (for example, Japanese Patent Laid-Open Nos. 10-216049 and 2000-267181). Please refer to.).

[0004]

However, the conventional camera housing having only a plane or spherical surface, that is, a camera housing having a front window, has the following problems.

If the camera window is, for example, a flat surface, the field of view of the camera is limited, so that the size of the camera housing becomes large when trying to secure the field of view for the rotation of the camera.

If the camera window has a spherical surface,
The wiper mechanism for dealing with this has a very complicated structure.

Therefore, if the housing is downsized while ensuring a wide field of view of the camera, the shape of the camera window becomes complicated.

As described above, there has been no means for cleaning the camera window such as a wiper device which can cope with the shape of the camera window which achieves both the wide field of view of the camera and the further miniaturization of the camera housing.

Therefore, an object of the present invention is to provide a camera housing having a window structure for ensuring a wider field of view and a wiper mechanism for effectively removing dirt on the window. To provide.

Another object of the present invention is to provide a camera housing in which the size of the entire housing is further reduced.

[0011]

To achieve this object, a camera housing according to the present invention includes a front window having a flat surface and a curved surface which are continuously connected in a specific direction to form a single surface. And a wiper mechanism for cleaning the front window.

With this structure, the size of the camera housing can be reduced.

Further, in the wiper mechanism of the present invention, the other end is connected to an extendable and retractable wiper arm connected to a rotary drive shaft, and is connected to one end of the wiper arm. The wiper is slidable while abutting the window.

At this time, the wiper arm includes a wiper housing, a shaft provided in the wiper housing, and elastic means for applying forward and backward forces to the shaft according to the rotation of the wiper arm. I am.

With this structure, the entire front window of the camera housing of the present invention can be uniformly and effectively swept and cleaned.

Further, according to the camera housing of the present invention, the wiper arm includes a movable portion including an elastic member which is an elastic means, a lubrication system, a stretching direction adjusting member and an elastic member adjusting mechanism.

With these structures, the operation of the wiper mechanism becomes smooth and stable.

Furthermore, the wiper of the wiper mechanism of the present invention comprises a wiper frame connected to the tip of the shaft, a wiper rubber mounting member, and a wiper rubber fixed to the wiper rubber mounting member.

In addition, the wiper of the wiper mechanism of the present invention preferably comprises a guide roller.

As a result, the stability and reliability of the wiper mechanism can be further enhanced.

Here, the elastic means of the wiper device of the present invention, that is, the elastic member is preferably a coil spring.

Further, the coil spring is preferably made of steel.

According to the camera housing of the present invention, the curved surface portion is preferably a transparent member formed of a part of the cylindrical surface.

Further, according to the camera housing of the present invention, it is preferable that the curved surface portion is a transparent member having a semi-arcuate cylindrical surface.

Furthermore, according to the camera housing of the present invention, the transparent member is preferably made of glass.

According to the structure of the camera housing of the present invention, the front window is formed integrally by combining the flat surface portion and the curved surface portion, so that it has a vast camera field of view especially as a camera housing of a swivel type camera. Can be secured. Further, the camera housing can be downsized.

The wiper mechanism has a simple structure,
Since the wiper rubber is equipped with a retractable wiper arm, the wiper rubber can smoothly follow and adhere to the curved surface portion and the flat surface portion of the front window or the boundary portion thereof. Therefore, the wiper rubber of the wiper mechanism of the present invention can sweep by sweeping the front window surface with a substantially constant and sufficient pressure, so that the entire front window surface can be uniformly and efficiently cleaned. Can be removed.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a camera housing of the present invention will be described below with reference to the drawings.

It should be noted that each of the drawings only schematically shows the shape, size, and arrangement relationship of each component so that the structure of the camera housing of the present invention can be understood. It is not limited. Further, in the drawings, it is to be understood that hatching (diagonal lines) indicating cross sections may be omitted except for a part in order to make the drawings easy to understand.

<First Embodiment> A first embodiment of the present invention will be described with reference to FIGS. 1, 2, 3 and 4. FIG. 1 is a schematic partial cross-sectional view of a camera housing equipped with the wiper device of the present invention as seen from above, in which other internal mechanisms are omitted so that the configuration of the wiper mechanism and its operating mechanism can be seen.

FIG. 2 is a schematic sectional view for explaining the wiper mechanism of the camera housing of the present invention.

FIG. 3 is a schematic side view showing how the wiper mechanism is attached to the camera housing casing.

FIG. 4 is a schematic cross-sectional view for explaining the structure of the expansion / contraction portion of the wiper mechanism of the camera housing of the present invention.

(Description of Case) The camera housing 10 of the present invention includes a case 14 which can be assembled, and has a structure in which, for example, an internal swivel type camera can be mounted. This housing 14 is basically a camera window through which the camera can see through the outside, that is, the front window 12 that constitutes the front portion and three surfaces excluding the front window 12, that is, the rear portion 14c, the left side portion 14d when viewed from the rear side, and It has a right side surface portion 14e, a housing roof portion 14a and a housing bottom surface portion 14b shown in FIG. The transparent material of the front window 12, such as a glass member or a plastic member, is fitted and fixed to the fitting frame 16 of the housing 14. A space for protecting the camera device from the external environment is formed in the housing 14.
In the camera housing of the present invention, the front window 12 has a feature in that the curved surface portion 12a and the flat surface portion 12b are one surface smoothly and seamlessly connected to each other.

In the configuration example shown in the figure, the curved surface portion 12a of the front window 12 has a shape corresponding to a part of a cylindrical surface, and is particularly formed as a semi-cylindrical surface shape. The flat surface portion 12b is provided on both ends of the cylindrical surface with the left and right flat surface portions 1b.
It is continuously formed so that 2b are parallel to each other.
Therefore, the front window 12 of the configuration example shown in the figure has a substantially U-shaped cross section, and is provided so that the curved and protruding side faces the outside of the housing 14. In FIG. 3, a semi-cylindrical surface-shaped transparent member, that is, the curved surface portion 12a.
The boundary between the flat portion 12b and the flat portion 12b is indicated by a dotted line.

(Explanation of Wiper Mechanism) In the camera housing 10 of the present invention, a casing 14 is provided with a wiper mechanism 20. The wiper mechanism 20 is connected to the housing 14 so as to be swingable along the front window 12 and in a direction substantially parallel to the roof portion 14a and the bottom portion 14b of the housing.

As can be seen from FIG. 2, the casing 14 has guide rails 27a along the upper and lower portions of the front window 12 fitted therein and guide rails 14aa for supporting and operating the guide roller 27, that is, the wiper mechanism 20. 14 ba is provided so as to project from the housing 14 in an integrated eaves-like shape.

As can be understood from FIG. 3, the wiper mechanism 20 includes a wiper arm 22 including an upper wiper arm 22a and a lower wiper arm 22b each having a telescopic portion 30, and the upper wiper arm 22.
a and a wiper 28 connected to and retained by the lower wiper arm 22b. The wiper 28 includes a wiper rubber mounting member 24, a wiper rubber 26 mounted on the wiper rubber mounting member 24, and a guide roller 27.

As can be understood from FIG. 2, the guide roller 27 is preferably made of, for example, a metal such as aluminum, and a main roller 27a and, for assisting the sliding of the main roller 27a, made of resin or the like. Sub roller 27b. The main roller 27a has
It is preferable to provide the guide roller 27, that is, the collar 27aa for preventing the wiper mechanism 20 from falling off. Further, when the wiper mechanism 20 is installed in the housing 14, it is preferable that the brim 27aa of the main roller 27a is placed so as to engage with the eave-shaped guide rails 14aa and 14ba provided in the housing 14.

The wiper arm 22 which is a feature of the present invention
Is that it has a shaft 32 configured to be able to move forward and backward in the axial direction and a stretchable portion 30 including a plurality of members that contribute to the movement of the shaft 32. In the configuration example shown in FIG. 4, the expandable portion 30, that is, the members such as the shaft 32 are provided in the arm casing 40. One end of the shaft 32 is the arm housing 4
0 and the wiper frame 2 protruding from one end side
Connected to 3.

The expandable part 30 further includes, for example, an expandable direction adjusting mechanism 34, a lubrication system 35, an elastic member 36, and an elastic member adjusting mechanism 38. Further, in the configuration example shown in FIG. 4, the expansion / contraction direction adjusting mechanism 34 is formed of, for example, an angular block member, and is fixed to the arm housing 40 by the fixing member 22c.

The angular block member 34 is provided with a through hole at the center of its diameter along the central axis, and the shaft 32 movably penetrates through this through hole. The block member 34 has a function of restricting the shaft 32 so that the central axis of the shaft 32 does not deviate when the shaft 32 moves forward or backward.

The lubrication system 35 is provided to maintain the smooth movement of the shaft 32. The lubrication system 35 is provided in front of and / or behind the block member 34. In this configuration example, an oilless lubrication system 35 is provided at the front and rear end portions of the block member 34.

The elastic member 36 is a member that substantially contributes to the flexible forward or backward movement of the shaft 32. The member 36 may have any structure and material as long as it can be expanded and contracted to return (restore), but the details will be described later. In the configuration example shown in FIG. 4, the elastic member 36 is connected to the expansion / contraction direction adjusting mechanism 34 via the lubrication system 35.

The elastic member adjusting mechanism 38 includes the shaft 32.
Further, for example, it may be fixed by a fixing member 38a, or the elastic member adjusting mechanism 38 itself may have a structure capable of being positionably fixed to the shaft 32, but the fixing point is the elasticity of the elastic member 36. It can be set in consideration of force adjustment and shaft movement. The configuration example shown in FIG. 4 has a modified block shape, and a through hole is provided along the central axis passing through the center of the diameter. The shaft 32 is inserted into this through hole and is fixed to the elastic member adjusting mechanism 38 with, for example, a screw or the like.

By configuring the wiper arm 22 in this way, when an external force is applied to the shaft 32 and the shaft 32 is pulled to the outside of the arm casing 40, the pulling force is applied from the shaft 32 to the elastic member adjusting mechanism. It is transmitted to the elastic member 36 via 38. Therefore, due to this tensile force, the elastic member 36 contracts from the steady state against the elastic force, and the shaft 32 advances and projects from the arm housing 40. When the tensile force weakens or disappears, the elastic member 36 restores to return to the original steady state by the action of the elastic force, and the restoring force is the elastic member adjusting mechanism 3
It is transmitted to the shaft 32 via 8. As a result, the shaft 32 retracts and returns to its original position.

The wiper arm 22 having the above-mentioned structure is provided as an upper wiper arm 22a and a lower wiper arm 22b, each of which has a shaft 32 and a telescopic portion 30 in an arm casing 40.

(Wiper drive mechanism) Wiper arm 22
Is connected to one end of the arm casing 40 by the wiper drive mechanism 50.
Is bound to.

In the wiper drive mechanism 50, a rotational force for transmitting the rotational force of the electric drive motor 52 and the motor shaft 52a of the drive motor 52 to the rotational drive shaft 60 of the wiper arm 22 (22a, 22b), respectively. Transmission mechanism 6
The configuration of 2 can be any suitable configuration depending on the design. In the configuration example shown in FIG. 2, this transmission mechanism 62
Is a sprocket 52 attached to the motor shaft 52a.
b, the rotation transmission shaft 56, the sprocket 56a and the two pulleys 56b and 56c attached to the rotation transmission shaft 56, and both ends of the roof portion 14a of the housing 14 via bearings (not shown). Bottom part 14
b, pulleys 60a and 60b mounted on the upper and lower rotary drive shafts 60, respectively, a chain belt 54 mounted between two sprockets 52b and 56a, and two sets of pulleys 56b.
And 60a, and the timing belt 58a mounted and attached between the pulleys 56c and 60b, respectively.
And 58b.

Wiper arm 22 (22a, 22b)
Is the drive motor 5 of the rotational force transmission mechanism 62 configured as described above.
The two motor shafts 52a are fixed to pulleys 60a and 60b which are connected to each other via a rotation transmission shaft 56, and are swingably connected about a rotation drive shaft 60.

The position at which the rotary drive shaft 60 is provided may be any suitable position depending on the design. In this configuration example, it is preferable to provide the rotary drive shaft 60 at the cylindrical surface of the front window 12, that is, at the center of the circle forming the curved surface portion 12a.

In this way, the cylindrical surface and the rotary drive shaft 6
The distance between the wiper 28 and the rotary drive shaft 60 is variable regardless of the sliding transmission of the wiper 28. And when it is sliding.

In the camera housing 10 of the present invention, the material of the front window 12 is preferably glass, tempered glass, tempered plastic, acrylic glass, etc., but it is also installed within a range that does not affect the image taken by the camera. It is preferable to use materials that have been determined in consideration of external environmental factors such as temperature and humidity in the area where it is operated. The window member is preferably made of glass or tempered glass.

The front window 12 is essentially provided with means for preventing fogging and freezing prevention, for example, a washer, a defroster, a heater, etc., in accordance with the external environmental conditions of the installation place, without impairing the object of the present invention. Alternatively, it may be additionally included.

The material forming the casing 14 is not particularly limited as long as it does not impair the object of the present invention and may be determined in consideration of external environmental factors, desired strength, cost and the like. It is preferably made of titanium alloy, aluminum alloy, stainless alloy or the like. Suitably the material of the housing is
Considering weight, strength and cost, aluminum alloy is preferable.

The material forming the wiper arm 22 of the wiper mechanism 20 is also the same as the case 14 described above.
Just select it.

As the wiper rubber 26, those conventionally used for automobiles can be applied. That is, the wiper rubber 26 is in direct contact with the front window 12 and is connected to the rubber member 26a for sweeping dirt adhering to the surface of the front window 12 and the wiper rubber mounting member 24 supporting the rubber member 26a. Rubber member support member 26b.
The rubber member support member 26b is preferably an elastic member that brings the rubber member 26a into close contact with the surface of the front window 12. It is preferable to use a material such as steel to form a leaf spring shape, but the material is not limited to this.

The rubber member supporting member 26b is, for example, the rubber member 26 within a range not impairing the object of the present invention.
rubber member 26a in order to bring a into close contact with the front window 12 surface.
It may include a swinging mechanism for swinging itself.

Since the shaft 32 of the expansion / contraction portion 30 is a member that substantially supports the wiper arm 22, it has a necessary and sufficient strength with stress resistance, abrasion resistance, etc., and the elastic member 36 and the expansion / contraction direction adjustment. It may be determined in consideration of the balance with other members such as the mechanism 34. The cross-sectional shape is preferably circular considering stress resistance, wear resistance, and the like.
The length may be determined according to the stroke length required for the entire expansion / contraction portion 30, that is, the shape and size of the front window 12.

The expansion / contraction direction adjusting mechanism 34, as described above,
It is a member for making the movement of the shaft 32 in the wiper arm 22 only in the long axis direction, that is, for preventing the movement from being shaken. The material and the shape thereof are not particularly limited, as long as the object of the present invention is not impaired,
In particular, it is preferable to determine it in consideration of wear resistance and durability.
It is preferable to use a square block member made of stainless steel.

The diameter and shape of the through hole provided in the expansion / contraction direction adjusting mechanism 34 may be determined so as to operate smoothly depending on the diameter and shape of the shaft 32. Also,
The inner wall portion of the through hole of the expansion / contraction direction adjusting mechanism 34 is always in contact with the shaft 32 and slides with the shaft 32 during operation. Therefore, in consideration of external environmental factors, etc. It is preferred to have any suitable lubrication system such as grease. In consideration of maintenance and the like, it is preferable to provide oilless holes in the openings on both end surfaces of the expansion / contraction direction adjusting mechanism 34 in the long axis direction.

The expansion / contraction direction adjusting mechanism 34 is fixed in the wiper arm 22 by a fixing member 22c. The fixing member 22c may be, for example, a member such as a bolt, an adhesive, or the like, but may be appropriately selected within a range that does not impair the object of the present invention.

The elastic member 36 expands / contracts the expansion / contraction part 30 of the wiper arm 22 according to the operation of the wiper mechanism 20. Then, it cooperates with the above-mentioned rubber member support member 26b to play a role of bringing the rubber member 26a into close contact with the surface of the front window 12. Therefore, the elasticity of the elastic member 36 should be determined such that the rubber member 26a is in close contact with the front window 12 and is within a range suitable for smoothly sliding on the surface and sweeping. .

The material of the elastic member 36 may be determined in consideration of wear resistance, durability, etc. according to the necessary external environmental factors.

Specifically, the elastic member 36 may be appropriately selected from, for example, a coil spring (coil spring), a torsion coil spring, a disc spring, a leaf spring, a rubber block, a resin block, or the like. The elastic member 36 is preferably a steel coil spring.

The elastic member adjusting mechanism 38 can freely move back and forth on the shaft 32, that is, can move forward and backward, and can fix the elastic member 36 while keeping the entire length of the elastic member 36 at a desired position. Although it is not particularly limited as long as it has or includes, it is preferable to use, for example, a set color.

For example, the set collar and the shaft 32 are
It is similar to the relationship between nuts and bolts. That is, a groove similar to the tip of the bolt is formed on one end side of the shaft 32 so that the shaft 32 can be freely moved back and forth while rotating the set collar itself, and a desired groove is formed. The entire length of the elastic member 36 can be held and fixed at the position. In this way, the wiper mechanism 2
Front window 1 when 0 slides on front window 12 and sweeps
The pressure on 2 can be adjusted appropriately.

(Operation of Wiper Mechanism) The operation of the wiper mechanism 20 of the camera housing of the present invention will be described below with reference to FIGS. 2 and 5 in relation to the configuration of the wiper drive mechanism 50. FIG. 5 is a schematic view for explaining the operation of the wiper mechanism and the expansion / contraction part of the camera housing of the present invention.

Now, the wiper arm 22 has a radius R, for example.
It is assumed that it is located at the position A corresponding to the center of the cylindrical surface. In this case, the shaft 32 is in the steady state, or the wiper rubber member 26 causes the curved surface portion 1 of the front window 12 to operate by the action of the elastic member 36 in which a tensile force is exerted to some extent.
It is in contact with 2a.

The dynamic rotational force generated by the drive motor 52 is applied to the rotation transmission shaft 56 by the chain belt 54.
Be transmitted to. The rotational force of the rotation transmission shaft 56 is generated by the upper timing belt 58a and the lower timing belt 58.
By b, it is synchronously transmitted to the pulleys 60a and 60b attached to the rotary drive shafts 60 of the upper wiper arm 22a and the lower wiper arm 22b, respectively.

The rotation of the rotary drive shaft 60 causes the wiper arm 22 (22a and 22b) to swing from the position A to the position B. Since the curvature of the curved surface portion 12a from position A to position B is constant, the distance R between the rotary drive shaft 60 and the curved surface portion 12a is also constant. Therefore, since the shaft 32 (see FIG. 4) of the wiper arm 22 (22a and 22b) between the positions A and B does not move forward or backward, the external force applied to the coil spring as the elastic member 36 does not change.

When the rotary drive shaft 60 further rotates, the wiper mechanism 20 moves to the flat surface portion 12b of the front window and slides on the surface. The distance between the surface of the flat portion 12b and the rotary drive shaft 60 gradually increases as the wiper arm 22 (22a, 22b) moves from position B to position C. Therefore, the wiper rubber 26 has the flat portion 1
To slide on 2b, a force is applied to the shaft 32 (see FIG. 4) to pull its tip outward. Therefore, this pulling force is transmitted from the shaft 32 to the elastic member 36, that is, the coil spring via the elastic member adjusting mechanism 38, and the coil spring contracts against the spring force.

When the elastic member 36 contracts,
The wiper arm 22 (22a, 22b) can smoothly slide to the position C while bringing the wiper rubber 26 into contact with the flat surface portion 12b of the front window 12.

In this way, the wiper mechanism 20 as a whole swings within the installation range of the front window 12.

Furthermore, the swing direction of the wiper mechanism 20 can be switched by switching the rotation direction of the drive motor 52 to the opposite direction. At the time of this switching, it is preferable to provide some means such as a sensor for detecting that the wiper arm 22 has reached a position where switching is required, for example, position C. By this switching, the wiper arm 26 can be slid in the reverse direction from position C to position B and then position A while the wiper rubber 26 is brought into contact with the front window 12 according to the restoring force of the elastic member 36. That is, the wiper mechanism 20 can be reciprocated along the surface of the front window 12.

The structure of the wiper arm described above is merely a preferred example, and the wiper arm is not limited to the structure described above. For example, the elastic member 36 may be provided between the end of the shaft 32 and the elastic member adjusting mechanism 38. Further, the method of providing the elastic member 36 on the shaft 32 may be any suitable method depending on the design.

[0077]

According to the structure of the camera housing of the present invention, since the front window is formed integrally by combining the flat surface portion and the curved surface portion, it is particularly wide as a camera housing for a swivel type camera. The camera view can be secured. Further, the camera housing can be downsized.

Further, since the wiper mechanism of the present invention has a retractable wiper arm with a simple structure, the wiper rubber smoothly follows the curved surface portion and the flat surface portion of the front window or even the boundary portion thereof. Can abut. Therefore, the wiper rubber of the wiper mechanism of the present invention can sweep by sweeping the front window surface with a substantially constant and sufficient pressure, so that the entire front window surface can be uniformly and efficiently cleaned. Can be removed.

[Brief description of drawings]

FIG. 1 is a schematic partial cross-sectional view of a camera housing equipped with a wiper device of the present invention seen from above, with other internal mechanisms being omitted so that the configuration of the wiper mechanism and its operating mechanism can be seen.

FIG. 2 is a schematic cross-sectional view for explaining the wiper mechanism of the camera housing of the present invention.

FIG. 3 is a schematic side view showing how a wiper mechanism is attached to a camera housing casing.

FIG. 4 is a schematic cross-sectional view for explaining the structure of the expansion / contraction part of the wiper mechanism of the camera housing of the present invention.

FIG. 5 is a schematic cross-sectional view for explaining the operation of the wiper mechanism and the expansion / contraction portion of the camera housing of the present invention.

[Explanation of symbols]

10 camera housing 12 front window 12a curved surface 12b Flat part 14 housing 14a Housing roof part 14aa, 14ba Guide rail 14b Case bottom part 14c rear part 14d Left side part 14e Right side surface 16 Inset frame 20 Wiper mechanism 22 Wiper arm 22a Upper wiper arm 22b Lower wiper arm 22c, 38a fixing member 23 Wiper frame 24 Wiper rubber mounting member 26 wiper rubber 26a rubber member 26b Rubber member support member 27 Guide roller 27a Main roller 27b Sub roller 28 wiper 30 telescopic part 32 shaft 34 Extension direction adjustment mechanism (block member) 35 Lubrication system 36 Elastic member 38 Elastic member adjustment mechanism 40 arm case 50 wiper drive mechanism 52 Drive motor 52a motor shaft 52b, 56a sprockets 54 chain belt 56 rotation transmission shaft 56b, 56c, 60a, 60b pulley 58a, 58b Timing belt 60 rotary drive shaft 62 Rotational force transmission mechanism

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaaki Kano, 45, Hayasaka Riko Co., Ltd., 4-8, Kita 6-jo Higashi, Higashi-ku, Sapporo-shi, Hokkaido (56) References: JP-A-5-145814 Kaihei 11-119315 (JP, A) JP 10-216049 (JP, A) Actual Kaihei 6-55871 (JP, U) Utility model registration 3067064 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 5/222-5/257 H04N 7/18 H04N 5/225

Claims (11)

(57) [Claims] 1. A camera housing, comprising: a front window having a flat surface and a curved surface which are connected to each other in a specific direction to form a single surface, and a wiper mechanism for cleaning the front window. 2. The wiper mechanism includes an extendable and retractable wiper arm, one end of which is connected to a rotary drive shaft, and the other end of the wiper arm. The wiper mechanism follows the rotation of the wiper arm and follows the front surface. The camera housing according to claim 1, further comprising a wiper that is slidable while abutting on the window. 3. The wiper arm includes a wiper housing, a shaft provided in the wiper housing, and elastic means for applying forward and backward forces to the shaft according to the rotation of the wiper arm. The camera housing of claim 2, wherein the camera housing comprises: 4. The camera according to claim 3, wherein the wiper arm includes a movable portion including an elastic member which is the elastic means, a lubrication system, a stretching direction adjusting member, and an elastic member adjusting mechanism. housing. 5. The wiper comprises a wiper frame connected to the tip of the shaft, a wiper rubber mounting member, and a wiper rubber fixed to the wiper rubber mounting member. The camera housing according to claim 4. 6. The camera housing according to claim 5, wherein the wiper further includes a guide roller. 7. The camera housing according to claim 3, wherein the elastic means is a coil spring. 8. The camera housing according to claim 7, wherein the coil spring is made of steel. 9. The camera housing according to claim 1, wherein the curved surface portion is a transparent member formed of a part of a cylindrical surface. 10. The camera housing according to claim 1, wherein the curved surface portion is a transparent member having a semi-arcuate cylindrical surface. 11. The camera housing according to claim 9, wherein the transparent member is made of glass.