JP2022072884A - Unit coupling structure - Google Patents

Abstract

To provide a unit coupling structure that provides electrically high connection reliability and that is capable of securely fitting units to one another.SOLUTION: A second unit 20 includes a main body 21 having an inner cylinder part 2111 in which a circumferential surface is formed and which has a connection surface 212 and a connection surface 1431, and a cylindrical case part 22 which rotatably encloses the circumferential surface of the main body 21. A female connector 24 is disposed on the connection surface 1431 in the connection surface 212, and a male connector 23 is disposed on the connection surface 212. At one end portion of the second unit 20, a first connection part 110 is formed in which the connection surface 1431 is retreated on the side deeper than a circumference of the case part 22, and a protrusion part 151 protruding toward the inside is formed in an edge part of an opening of the case part 22. At another end portion, a second connection part 120 is formed in which a recessed groove 213 to receive the protrusion part 151 is formed along in the circumferential direction on a circumferential surface of a projection of the main body 31 projected from the case part 32.SELECTED DRAWING: Figure 3

Description

The present invention relates to a unit connection structure in which various units can be interchangeably connected in series.

It is known that various units having various functions are connected to form a multifunctional device. For example, the desktop power relay device and the connecting unit used therein described in Patent Document 1 have a unified design for the first to fifth connecting units and are detachable from each other, so that the connecting order is changed. Or, one of the connecting units can be detached, or a connecting unit having a new function can be added.

In this connecting unit, for example, when connecting the second connecting unit to the first connecting unit, the second AC plug is erected and connected to the first connector of the first main body. By fitting the second protrusion of the second main body into the first concave portion of the first main body, the second connecting unit can be used as an AC tap by supplying power from the first connecting unit.

Further, although an extension device is connected to an electronic device, the one described in Patent Document 2 is known.
The connection structure of the extension device for electronic devices described in Patent Document 2 is such that one of the cylindrical connecting tools divided into two in the axial direction is provided in the main body of the electronic device and the other is provided in the extension device. A locking piece that is provided with two locking recesses along the circumferential direction and opened toward the appearance of the cylinder on one side, and is fitted to the locking recess on the other side of the cylindrical connector. Was provided, and the connection cable for the extension device was wired inside the cylindrical connector.

Japanese Unexamined Patent Publication No. 2007-103165 Jikkenhei 3-104972 Gazette

However, in the desktop power relay device and the connecting unit used thereof described in Patent Document 1, the second protruding portion of the second main body is fitted into the first concave portion of the first main body to be connected. Because it is only, there is a risk that it will come off easily.
In this regard, in the connection structure of the extension device for electronic devices described in Patent Document 2, since the locking piece is fitted in the locking recess, it is possible to fit the locking piece firmly, but the connection cable is used. Since it is in an exposed state, there is a risk of disconnection depending on how it is handled.

Therefore, an object of the present invention is to provide a unit connection structure in which high connection reliability can be obtained electrically and the units can be firmly fitted to each other.

The unit connection structure of the present invention is a unit connection structure for connecting units having an electric device built-in, and the unit has an inner cylinder portion in which the electric device is housed and a circumferential surface is formed. A main body portion having a connecting surface formed at an end portion of the inner cylinder portion and having a connecting surface facing the connecting surface of another unit, and a cylindrical case portion rotatably surrounding the circumferential surface of the main body portion. The connecting surface is provided with the other connector for being electrically connected to the electrical device and electrically connecting to one connector arranged on the connecting surface of the other unit. At the end of the unit, a first connecting portion is formed in which the connecting surface is recessed from the peripheral edge of the case portion and a protrusion protruding inward is formed on the opening edge portion of the case portion. At the end of the other unit that is connected to the first connecting portion, a concave groove into which the protruding portion is inserted is formed in the circumferential direction on the circumferential surface of the protruding portion in which the main body portion protrudes from the case portion. It is characterized in that a second connecting portion formed along the above is formed.

According to the unit connection structure of the present invention, the connectors arranged on the connection surface of the main body are connected to each other, the case of the unit is rotated, and the protrusion of the case is formed on the main body of another unit. Since it can be fitted into the recessed groove, the units can be connected to each other with the connectors connected to each other.

The concave groove is an insertion portion having a side wall opened in the detaching direction opposite to the fitting direction, and has an opening width equal to or larger than the length in the circumferential direction of the protrusion and a thickness equal to or larger than the thickness in the insertion / removal direction of the protrusion. It can be formed in an arc shape that narrows as it advances along the circumferential direction from the insertion portion having the groove width and extends so as to guide the protrusion in the circumferential direction.
The insertion portion whose side wall is opened in the detaching direction opposite to the fitting direction has an opening width equal to or larger than the length in the circumferential direction of the protrusion and a groove width equal to or larger than the thickness in the insertion / removal direction of the protrusion. Therefore, it is easy to insert the protrusion into the insertion portion, and when the case portion is rotated, the protrusion can be smoothly guided to the inner side of the concave groove.

The inner cylinder portion has a convex portion that is erected on the opening edge portion and elastically moves in the insertion / extraction direction, and the case portion has an initial position of the convex portion when the case portion rotates about its axis. And, it is possible to assume that a pair of recesses is formed at the end position where the fitting is completed.
When the case portion starts to rotate around the axis, the convex portion elastically moves and retracts to be detached from one concave portion, and when the fitting is completed, the convex portion can be fitted into the other concave portion. Therefore, it is possible to recognize that the fitting is completed by the click feeling when the convex portion fits into the other concave portion.

A convex portion is formed on the inner peripheral surface of the case portion, and a notch portion in which the convex portion moves is formed in the inner cylinder portion from an initial position to an end position of the convex portion when the case portion rotates about an axis. It can be formed up to a length of up to. When the case portion is axially rotated and the fitting is completed, the convex portion formed on the inner peripheral surface of the case portion hits the end wall of the notched portion, so that the axial rotation of the case portion can be suppressed.

On the connecting surface of the first connecting portion, an identification portion formed by either a convex portion or a concave portion is formed around a rectangular through hole in which the other connector is arranged, and the identification portion of the second connecting portion is formed. On the connecting surface, an identification portion formed by either a convex portion or a concave portion that fits with the identification portion is formed around a rectangular through hole in which the one connector is arranged, and the identification portion is the identification portion. The width of one long side of the through hole may be wider than the width of the other long side.
Therefore, even if both connectors are small and it is difficult to recognize the orientation of the trapezoidal connection port, the orientation of the connectors can be recognized by checking the orientation of the identification unit, so the connectors can be connected smoothly and reliably. can do.

It is possible that a packing portion is formed on the peripheral edge of the connecting surface in the first connecting portion. Since the packing portion is formed in the first connecting portion in which the main body portion is retracted from the case portion, the packing portion can function as a waterproof packing for closely connecting with the second connecting portion. It can prevent the ingress of water.

According to the unit connection structure of the present invention, the units can be connected to each other with the connectors connected to each other, so that high electrical connection reliability can be obtained and the units can be firmly fitted to each other. ..

It is a figure which shows the monitoring apparatus which concerns on embodiment of this invention. 1 is a view of the first unit of the monitoring device shown in FIG. 1, FIG. 1A is a perspective view of the first unit, and FIG. 1B is a partial cross-sectional view of the first unit. It is a figure of the 2nd unit of the monitoring apparatus shown in FIG. 1, (A) is a perspective view seen from the 1st connecting part side, (B) is a perspective view seen from the 2nd connecting part side, (C) is an inside. The figure for demonstrating the convex part formed in the cylinder part and the pair of concave parts formed in a case part, (D) shows the convex part formed in a case part and the notch part formed in an inner cylinder part. A figure for explaining the above, (E) is a cross-sectional view of the second unit. 1A is a view of the third unit of the monitoring device shown in FIG. 1, in which FIG. 1A is a perspective view seen from the first connecting portion side, and FIG. (C) is a perspective view seen from the second connecting portion side, (D) is a diagram for explaining a convex portion formed on the inner cylinder portion and a pair of concave portions formed on the case portion, (E). ) Is a diagram for explaining a convex portion formed on the inner peripheral surface of the case portion and a notch portion formed on the inner cylinder portion of the main body portion. It is a figure of the 4th unit of the monitoring apparatus shown in FIG. 1, (A) is a perspective view of a columnar main body part, (B) is a perspective view seen from the 2nd connection part side, (C) is a 4th unit. It is a cross-sectional view of. It is a figure of the 5th unit which can be connected to the monitoring apparatus shown in FIG. 1, (A) is the front view of the 5th unit, (B) is the plan view of the 5th unit.

The unit connection structure according to the embodiment of the present invention will be described with reference to the drawings, using a monitoring device as an example.
The monitoring device 1 shown in FIG. 1 is installed outdoors and can monitor the water level, for example. In the monitoring device 1, each unit of the first unit 10 to the fourth unit 40 is interchangeably connected in series.

The first unit 10 is a connecting unit for connecting to the support column P. The second unit 20 is a power supply unit in which a battery, which is an example of an electric device, is built and supplies power. The third unit 30 is a shooting unit having a built-in camera and outputting a shot image. The fourth unit 40 is a transmission unit that transmits an image of the input signal to the monitoring center by wireless signal.

As shown in FIG. 2A, the first unit 10 has a mounting portion 11 in which a pair of annular bands 11a wound around the strut P (see FIG. 1) are arranged along the vertical direction of the strut, and a mounting portion. A shaft portion (not shown) arranged on the upper portion of 11 is provided with a neck portion 12 attached so that the angle can be changed, and a head portion 13 provided on the upper portion of the neck portion 12 for connecting to other units. ing. The head portion 13 includes a main body portion 14 whose lower end is integrally connected to the neck portion 12, and a case portion 15 which is an outer cylinder surrounding the main body portion 14.
The main body portion 14 and the case portion 15 form a first connecting portion 110, which is a female connecting portion, at the upper end portion.

As shown in FIGS. 3 (A) and 3 (B), the second unit 20 surrounds the main body 21 in which a battery (not shown) is incorporated and has a circumferential surface formed therein, and the circumferential surface of the main body 21. It is provided with a case portion 22 that serves as an outer cylinder. The main body portion 21 and the case portion 22 form a first connecting portion 110, which is a female connecting portion, at one end, and is fitted to the first connecting portion 110 of the other unit at the other end. A second connecting portion 120, which is a male connecting portion, is formed.

As shown in FIGS. 4 (A) and 4 (B), the third unit 30 has a main body portion 31 in which a camera 31a is built and a circumferential surface is formed, and an outer surface surrounding the circumferential surface of the main body portion 31. It is provided with a case portion 32 that serves as a cylinder. The main body portion 31 and the case portion 32 form a first connecting portion 110 at one end and a second connecting portion 120 at the other end.

As shown in FIGS. 5A and 5B, the fourth unit 40 includes a columnar main body 41 containing a communication device (not shown) and an outer cylinder surrounding the circumferential surface of the main body 41. It is provided with a case portion 42. The main body portion 41 and the case portion 42 form a second connecting portion 120 at an end portion which is a bottom surface.

Here, the unit fitting structure according to the present embodiment will be described in detail with reference to the drawings.
First, the first connecting portion 110 of the first unit 10 will be described with reference to FIGS. 2 (A) and 2 (B).

The main body portion 14 includes a bowl-shaped portion 141 whose lower end is connected to the neck portion 12, a peripheral wall portion 142 extending cylindrically from the opening edge portion of the bowl-shaped portion 141 to form a circumferential surface, and a peripheral wall portion 142. A connecting portion 143 that serves as a lid portion that closes the upper end opening is formed.

A shelf portion 144 is formed at the edge portion of the bowl-shaped portion 141 because the width thereof is wider than the thickness of the peripheral wall portion 142. The lower end of the case portion 15 is mounted on the shelf portion 144. Further, between the peripheral wall portion 142 and the case portion 15, an inner cylinder portion 1432 extending downward from the peripheral edge of the connecting surface 1431 of the connecting portion 143 screwed to the bowl-shaped portion 141 is arranged. Therefore, the case portion 15 is rotatably arranged around the inner cylinder portion 1432 of the main body portion 14. The case portion 15 and the main body portion 14 are formed with screw holes 16 for fixing after being connected to other units, and are screwed by screws 17.

A through hole 1431a for inserting a male connector, which will be described later, is formed in a rectangular shape in the central portion of the connecting surface 1431 facing the connecting surface with the other unit.
A first convex portion 1431b (convex portion) is formed around the through hole 1431a. The first convex portion 1431b is formed in a rotational asymmetry in which the width of one long side of the rectangular through hole 1431a in which the connector is arranged is wider than the width of the other long side.
Further, a rod-shaped second convex portion 1431c extending along the radial direction is formed on the connecting surface 1431, and no convex portion is formed on the opposite radial direction.
Each of the first convex portion 1431b and the second convex portion 1431c functions as an identification unit for identifying the direction of axial rotation in the first unit 10.

The first convex portion 1431b is formed with a concave portion 1431d for accommodating a switch described later. Further, an annular packing portion 18 is arranged on the peripheral edge of the connecting surface 1431.

On the peripheral edge of the inner peripheral surface of the case portion 15, arcuate protrusions 151 are formed so as to project inward at three equidistant positions.
Since the connecting surface 1431 of the main body 14 is retracted to the back side from the peripheral edge of the case portion 15, the peripheral edge of the case portion 15 and the connecting surface 1431 form the first connecting portion 110 in a concave shape (female type). There is.

By forming the first unit 10 in this way, the case portion 15 can rotate around the main body portion 14 about the axis (hereinafter, this is referred to as axial rotation). Further, a first connecting portion 110, which is a female connecting portion, is formed at the upper end portion of the first unit 10 (the upper end portion between the main body portion 14 and the case portion 15).

Next, the fitting structure of the second unit 20 will be described with reference to FIGS. 3 (A) to 3 (D).
As shown in FIG. 3A, the first connecting portion 110 of the second unit 20 has the same shape as the first connecting portion 110 of the first unit 10 shown in FIG. 2A. Therefore, in FIG. 3A, the same components as those in FIG. 2A are designated by the same reference numerals and the description thereof will be omitted.

In the main body portion 21 shown in FIGS. 3 (A) to 3 (D), a storage portion 211 for accommodating a battery (electrical device) is formed by an inner cylinder portion 2111 having a circumferential surface formed by a cylindrical shape. ing. The inner cylinder portion 2111 has a bottom surface, closes the opening of the inner cylinder portion 2111, and one of the circular connecting surfaces 1431 facing the connecting surfaces of the other units is integrally connected to the inner cylinder portion 2111. ..
Further, when one connecting surface 1431 of the storage portion 211 is used as one end portion of the main body portion 21, the opening of the other end portion is closed and the other connecting surface facing the connecting surface with the other unit. The 212 is screwed to and fixed to the storage portion 211.

In the second unit 20, a female connector 24, which is one connector that is electrically connected to the built-in battery and electrically connects the units, is arranged in the through hole 1431a.
A screw hole 16 for fixing after connecting to another unit is formed in the case portion 22 and the main body portion 21, and the screw 17 is screwed to the screw hole 16.

At one end of the first connecting portion 110 of the second unit 20, the connecting surface 1431 of the main body portion 21 is located behind the peripheral edge of the case portion 22, similarly to the first unit 10 shown in FIG. 2 (A). Although it is retracted, the main body 21 protrudes from the case 22 at the other end of the second connecting portion 120 shown in FIG. 3 (B).
On the circumferential surface of the protruding portion of the protruding main body portion 21 (inner cylinder portion 2111), concave grooves 213 are formed at three points at equal intervals along the circumferential direction F1.

The concave groove 213 is formed in an arc shape toward the fitting direction F21 from the insertion portion 213a having a side wall opened toward the detaching direction F22 opposite to the fitting direction F21 along the circumferential direction F1. ..
Further, the connecting surface 212 shown in FIG. 3B has a through hole 212a, a first concave portion 212b (concave portion) corresponding to the first convex portion 1431b (see FIG. 2A), and a second convex portion 1431c. A second recess 212c corresponding to (see FIG. 2A) is formed. Each of the first recess 212b and the second recess 212c functions as an identification unit for identifying the direction of shaft rotation in the second unit 20.

In the second unit 20, the through hole 212a has a male connector 23 that is electrically connected to the built-in battery (electrical device) and is the other connector for electrically connecting the units. It is arranged in a protruding state by penetrating. By connecting the wiring from the battery to the connectors 23 and 24, power is supplied even if the connectors are connected to either the first connecting portion 110 or the second connecting portion 120.

As shown in FIGS. 3 (C) to 3 (E), a semicircular convex portion is erected on the opening edge of the other end of the inner cylinder portion 2111 of the storage portion 211 (main body portion 21). The portion 2111a is formed. Further, in order to allow the convex portion 2111a to move in the insertion / removal direction F3, the through hole 2111b is formed in the peripheral wall close to the convex portion 2111a, so that the elastic portion 2111c supporting the convex portion 2111a is formed. .. The opening edge portion of the case portion 22 protrudes inward so as to cover the opening edge portion of the inner cylinder portion 2111, and recesses 221 in which the convex portion 2111a is housed are formed in two places in the protruding portion. .. The pair of concave portions 221 are formed at an initial position of the convex portion 2111a when the case portion 22 rotates about the axis at the time of fitting and an end position at which the fitting is completed.
Therefore, at the initial position of fitting, the convex portion 2111a fits into one concave portion 221 and at the end position, it fits into the other concave portion 221.

Further, an arc-shaped notch 2111d in which the convex portion 222 formed on the inner peripheral surface of the case portion 22 moves is formed at the opening edge portion of the inner cylinder portion 2111 of the storage portion 211 (main body portion 21). There is. The cutout portion 2111d is formed to have a length from the initial position to the end position of the convex portion 222 when the case portion 22 rotates about its axis.

By forming the second unit 20 in this way, the case portion 22 rotatably rotates around the circumferential surface of the main body portion 21. Further, a first connecting portion 110, which is a female connecting portion, is formed at one end of the second unit 20 (one end of the main body 21 and the case 22), and the other end (main body). A second connecting portion 120, which is a male connecting portion, is formed at one end of the 21 and the case portion 22).

Next, the fitting structure of the third unit 30 will be described with reference to FIGS. 4 (A) to 4 (E).
As shown in FIGS. 4 (A) to 4 (C), the first connecting portion 110 and the second connecting portion 120 of the third unit 30 are the first connecting portion of the second unit 20 shown in FIG. 3 (A). The 110 has the same shape as the second connecting portion 120 shown in FIG. 3 (B), and the main body portion 31 and the case portion 32 have the same configuration. Therefore, in FIGS. 4A to 4E, the same components as those in FIGS. 3A to 3E are designated by the same reference numerals and the description thereof will be omitted.

A transparent portion through which the lens of the camera 31a can be seen is formed on the body portion of the main body portion 31.
In this way, even if the camera 31a is built in the main body 31, the case portion 32 rotates about the circumferential surface of the main body 31 by being configured in the same manner as the second unit 20 (see FIG. 3). .. Further, a first connecting portion 110, which is a female connecting portion, is formed at the upper end portion of the first unit 10 (upper end portion between the main body portion 31 and the case portion 32), and the other end portion (main body portion 31 and the case portion) is formed. A second connecting portion 120, which is a male connecting portion, is formed at one end of the 32).

By connecting the wiring from the camera 31a to the connectors 23 and 24, the image data from the camera 31a can be received even if the connector is connected to either the first connecting portion 110 or the second connecting portion 120. ..

Next, the fitting structure of the fourth unit 40 will be described with reference to FIGS. 5 (A) to 5 (C).
As shown in FIG. 5 (B), the second connecting portion 120 of the fourth unit 40 is the second connecting portion 20 shown in FIGS. 3 (B) and 4 (C) and the second connecting portion 120 shown in FIG. 3 (B). It has the same shape as the portion 120. Therefore, in FIG. 5A, the same components as those in FIGS. 3B and 4C are designated by the same reference numerals and the description thereof will be omitted.

The main body 41 has a cylindrical peripheral wall on the peripheral edge of a circular connecting surface 212 as a mounting surface for mounting a circuit component for wireless communication and a battery for supplying power to the circuit component. The part 411 is erected.
The case portion 42 is formed in a shape that surrounds the circumferential surface of the peripheral wall portion 411 and covers the opening portion of the main body portion 41. A light guide body 43 that irradiates the outside with light from an LED (not shown) indicating a communication state is arranged in the case portion 42.

As shown in FIGS. 2A, 3A, and 4A, a switch 44 for switching power on / off is provided at a position corresponding to the recess 1431d of the first connecting portion 110. It is provided.
By forming the fourth unit 40 in this way, the second connecting portion 120, which is a male connecting portion, is formed at the other end portion (the other end portion of the main body portion 41 and the case portion 42). To.

The usage state of the unit fitting structure according to the embodiment of the present invention configured as described above will be described with reference to the drawings.
In the present embodiment, the connection between the second unit 20 shown in FIG. 3 as one unit and the third unit 30 shown in FIG. 4 as the other unit will be described.
First, the second connecting portion 120 of the third unit 30 shown in FIG. 4C is inserted into the second unit 20 shown in FIG. 3A. At this time, the protrusion 151 of the case portion 22 is inserted so as to be located at the insertion portion 213a of the concave groove 213. Then, the male connector 23 of the third unit 30 is inserted into the female connector 24 of the second unit 20 and connected.

Next, the case portion 22 of the second unit 20 shown in FIG. 3A is axially rotated. Since the case portion 22 rotates on the circumferential surface of the main body portion 21, the case portion 22 can be axially rotated even when the male connector 23 and the female connector 24 are connected.

As the axis of the case portion 22 rotates, the protrusion 151 of the case portion 22 moves from the insertion portion 213a toward the inner side of the concave groove 213.
The concave groove 213 shown in FIG. 4C is in the circumferential direction from the insertion portion 213a having an opening width equal to or larger than the length of the protrusion 151 in the circumferential direction and a groove width equal to or larger than the thickness of the insertion / removal direction F3 of the protrusion 151. As it advances along F1, it becomes narrower and extends so as to guide the protrusion 151 in the circumferential direction F1. Therefore, the protrusion 151 can be easily inserted into the insertion portion 213a, and when the case portion 22 is rotated, the protrusion 151 can be smoothly guided to the inner side of the concave groove 213. Therefore, the second unit 20 and the third unit 30 can be firmly connected.

In this way, with the second unit 20 shown in FIG. 3 and the third unit 30 shown in FIG. 4 connected to the connectors 23 and 24, the case portion 22 of the second unit 20 is rotated to form a third unit. It can be fitted into the main body 31 of the unit 30. Therefore, the connection between the first connecting portion 110 and the second connecting portion 120 can obtain high electrical connection reliability and allow the units to be firmly fitted to each other.

As shown in FIG. 4 (E), the case portion 22 is formed with a convex portion 222 on the inner peripheral surface, and the inner cylinder portion 2111 of the main body portion 21 is formed with a notched portion 2111d. Therefore, when the case portion 22 is axially rotated and the fitting is completed, the convex portion 222 formed on the inner peripheral surface of the case portion 22 hits the end wall of the notch portion 2111d and suppresses the axial rotation of the case portion 22. Therefore, it is possible to prevent the case portion 22 from being turned too much at the time of fitting and the protrusion 151 from riding on the end wall on the inner side of the concave groove 213.

Further, a convex portion 2111a is formed in the inner cylinder portion 2111 (main body portion 21) shown in FIG. 3C, and a pair of concave portions are formed in the case portion 22 at the initial position and the end position when the convex portion 2111a is fitted. 221 is formed. Therefore, when the case portion 22 starts to rotate about the axis, the convex portion 2111a elastically moves and retracts to the through hole 2111b side to be detached from one concave portion 221. When the fitting is completed, the convex portion 2111a is moved to the other concave portion. Fits in 221.

Therefore, it is possible to recognize that the fitting is completed by the click feeling when the convex portion 2111a fits into the other concave portion 221. Therefore, it is possible to prevent the case portion 22 from being turned too much.

A first convex portion 1431b is formed around a rectangular through hole 1431a in which the female connector 24 is arranged on the connecting surface 1431 shown in FIG. 3A, and the first convex portion 1431b is formed in the through hole 1431a. The width of one long side is wider than the width of the other long side. Similarly, a first recess 212b is formed around a rectangular through hole 212a in which the male connector 23 is arranged on the connecting surface 212 shown in FIG. 4C, and the first recess 212b penetrates through the first recess 212b. The width of one long side of the hole 212a is wider than the width of the other long side.

Therefore, even if the connectors 23 and 24 are small and it is difficult to recognize the orientation of the trapezoidal connection port, the orientation of the connectors 23 and 24 can be recognized by checking the orientation of the first convex portion 1431b or the first concave portion 212b. Therefore, the connectors 23 and 24 can be connected to each other smoothly and surely.

A packing portion 18 is formed on the peripheral edge of the connecting surface 1431 in the first connecting portion 110 of the second unit 20 shown in FIG. 3A. Therefore, when the connecting surface 212 of the second connecting portion 120 of the third unit 30 shown in FIG. 4C is abutted against the connecting surface 1431 of the first connecting portion 110 of the second unit 20 shown in FIG. 3A. In addition, since the connecting surface 212 and the connecting surface 1431 can be brought into close contact with each other, the packing portion 18 can function as a waterproof packing that prevents water from entering.

In this embodiment, as shown in FIG. 1, the first unit 10 is connected to the support column P, and the first unit 10 is connected so as to be stacked in the order of the second unit 20, the third unit 30, and the fourth unit 40. However, since the combination of the first connecting portion 110 and the second connecting portion 120 (see, for example, FIG. 3) can be connected, the second unit 20 and the third unit 30 can be interchanged. Further, either the second unit 20 or the third unit 30 can be removed.

Further, instead of the first unit 10 shown in FIG. 1, the fifth unit 50 shown in FIG. 6 (A) can be connected to the second unit 20.
The fifth unit 50 shown in FIG. 6A and FIG. 6B is a water level gauge. In FIG. 6 (B), those having the same configurations as those in FIGS. 2 (A), 3 (A) and 4 (A) are designated by the same reference numerals.

The fifth unit 50 is formed with a first connecting portion 110 at the top. By connecting the first connecting portion 110 of the fifth unit 50 to the second unit 20 shown in FIG. 3, power is supplied from the second unit 20, and the fourth unit 40 is connected to the fourth unit 40 together with the image of the third unit 30. , The water level data can be output, and the water level data can be transmitted from the fourth unit 40 by wireless communication.

Since the unit having various functions can be connected, the present invention can be applied to various devices because the functions can be selected and the functions can be easily expanded.

1 Monitoring device 10 1st unit 11 Mounting part 11a Band 12 Neck part 13 Head 14 Main body part 141 Bowl-shaped part 142 Peripheral wall part 143 Connecting part 1431 Connecting surface 1431a Through hole 1431b 1st convex part 1431c 2nd convex part 1431d Cylindrical part 144 Shelf part 15 Case part 151 Protruding part 16 Screw hole 17 Screw 18 Packing part 20 Second unit 21 Main body part 211 Storage part 2111 Inner cylinder part 2111a Convex part 2111b Through hole 2111c Elastic part 2111d Notch part 212 Connecting surface 212a Through hole 212b 1st concave part 212c 2nd concave part 213 concave groove 213a insertion part 22 case part 221 concave part 222 convex part 23, 24 connector 30 3rd unit 31 main body part 31a camera 32 case part 40 4th unit 41 main body part 411 peripheral wall part 42 Case part 43 Light guide body 44 Switch 50 5th unit 110 1st connecting part 120 2nd connecting part P strut F1 Circumferential direction F21 Fitting direction F22 Detachment direction F3 Insertion / removal direction

Claims (6)

In the unit connection structure for connecting units with built-in electrical equipment,
The unit has an inner cylinder portion in which the electric device is housed and has a circumferential surface formed therein, and has a connecting surface formed at an end portion of the inner cylinder portion and facing a connecting surface of another unit. It is provided with a main body portion and a cylindrical case portion that rotatably surrounds the circumferential surface of the main body portion.
On the connecting surface, a connector for electrically connecting to the electric device and one connector arranged on the connecting surface of the other unit is arranged, and the other connector is arranged.
At the end of the unit, a first connecting portion is formed in which the connecting surface is recessed from the peripheral edge of the case portion and a protrusion protruding inward is formed on the opening edge portion of the case portion. Formed,
At the end of the other unit connected to the first connecting portion, a concave groove into which the protruding portion is inserted is formed along the circumferential direction on the circumferential surface of the protruding portion where the main body portion protrudes from the case portion. A unit connecting structure in which a second connecting portion is formed. The concave groove is an insertion portion having a side wall opened in the detaching direction opposite to the fitting direction, and has an opening width equal to or larger than the length in the circumferential direction of the protrusion and a thickness equal to or larger than the thickness in the insertion / removal direction of the protrusion. The unit connecting structure according to claim 1, wherein the unit connection structure is formed in an arc shape that narrows as it advances along the circumferential direction from the insertion portion having a groove width and extends so as to guide the protrusion in the circumferential direction. The inner cylinder portion is formed with a convex portion that is erected on the opening edge and elastically moves in the insertion / extraction direction.
The unit connecting structure according to claim 1 or 2, wherein the case portion has a pair of concave portions formed at an initial position of the convex portion when the case portion rotates about an axis and an end position at which fitting is completed. A convex portion is formed on the inner peripheral surface of the case portion.
3. The unit connection structure described in any section. On the connecting surface of the first connecting portion, an identification portion formed by either a convex portion or a concave portion is formed around a rectangular through hole in which the other connector is arranged.
On the connecting surface of the second connecting portion, an identification portion formed by either a convex portion or a concave portion that fits with the one identification portion is formed around a rectangular through hole in which the one connector is arranged. ,
The unit connection structure according to any one of claims 1 to 4, wherein the identification unit has a width on one long side of the through hole wider than the width on the other long side. The unit connecting structure according to any one of claims 1 to 5, wherein a packing portion is formed on the peripheral edge of the connecting surface in the first connecting portion.

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