JP2008310978A - Slip ring and head system - Google Patents

Abstract

An inexpensive and highly reliable slip ring is provided.
A slip ring of the present invention includes a plurality of conductive rings that are electrically connected to a pan unit, a plurality of conductive brushes that are electrically connected to a fixed power supply unit, and a conductive ring. And a conductive ring fixing shaft 23 for fixing 21. Moreover, the shaft part 25 used as the rotation center of the conductive ring fixed shaft 23 is provided. Then, by rotating the conductive ring fixing shaft 23 with respect to the shaft portion 25 by a certain angle, the plurality of conductive rings 21 are positioned and fixed coaxially while ensuring insulation.
[Selection] Figure 3

Description

  The present invention relates to a slip ring and a pan / tilt head device equipped with the slip ring.

  2. Description of the Related Art In recent years, a surveillance camera having a function of tracking a moving object such as a human being while installing a pan head device for panning and tilting a camera unit on a ceiling and monitoring a situation such as a store or a bank has been provided. It has come to be.

  As described above, when tracking a moving object such as a human, the pan / tilt head device having a limited rotation angle also has a problem that tracking must be stopped halfway.

  In view of this, a pan / tilt head device in which a slip ring with no limitation on the rotation angle is mounted has been proposed (see, for example, Patent Document 1).

  6A and 6B are configuration diagrams of the above-described slip ring, where FIG. 6A is a perspective view, FIG. 6B is a top view, and FIG. 6C is an exploded view.

  The configuration of the conventional example will be described with reference to FIG.

  The conventional slip ring 50 is configured to transmit a 6-pin signal, and the signal is transmitted when the conductive ring 51 and the conductive brush 55 come into contact with each other.

  The conductive ring 51 is assembled so as to be arranged in the same circular shape in the axial direction while sandwiching the insulating ring 52 in the conductive ring bearing portion 53 having insulating properties. The insulating ring 52 assembled at this time is a member for preventing the adjacent conductive ring 51 from making electrical contact. Further, the lead wire 54 is soldered to the assembled conductive ring 51 by an internal soldering portion 54a.

  The conductive brush 55 is configured to be fixed to the conductive brush fixing case 57 in the same circular shape and axially so as to face the conductive ring 51, and to electrically connect the connecting pin 56 from the outside. It can be electrically connected to the outside. Further, a shaft portion 58 is press-fitted and fixed to the conductive brush fixing case 57.

When the shaft portion 58 and the conductive ring bearing portion 53 are engaged and rotated, a signal can be transmitted while the conductive ring 51 and the conductive brush 55 are in contact with each other.
JP 2000-77150 A

  However, in the conventional slip ring 50 as described above, it is necessary to sandwich the insulating ring 52 in order to ensure the insulation between the adjacent conductive rings 51, which increases the number of components and increases the number of assembly steps. There was a problem of end.

  Furthermore, since the conductive ring 51 is soldered to the lead wire 54 at a position inside the conductive ring 51 so as to avoid the conductive ring bearing portion 53, there is a problem that workability is very poor and assembly work is required. . Further, since it is difficult to visually recognize from the outside, it is difficult to confirm the electrical performance after soldering, and there is a problem that reliability is poor.

  An object of the present invention is to provide an inexpensive and highly reliable slip ring and pan head device.

  In order to achieve the above object, a slip ring according to claim 1 is electrically connected to the pan unit in a slip ring mounted on a pan rotation shaft of a pan head apparatus including a pan unit having a camera unit. A plurality of conductive rings, a plurality of conductive brushes electrically connected to a fixed power supply unit, a conductive ring fixing shaft for fixing the conductive ring, and a shaft portion serving as a rotation center of the conductive ring fixing shaft. A plurality of the conductive rings are coaxially positioned and fixed while securing insulation properties by rotating the conductive ring fixing shaft at a predetermined angle with respect to the shaft portion. To do.

  The pan head apparatus according to claim 5, wherein the pan head apparatus includes a pan unit in which a camera unit is disposed, and the slip ring mounted on the pan rotating shaft includes a plurality of conductive rings electrically connected to the pan unit. A plurality of conductive brushes electrically connected to a fixed power supply unit; a conductive ring fixing shaft for fixing the conductive ring; and a shaft portion serving as a rotation center of the conductive ring fixing shaft. A plurality of the conductive rings are coaxially positioned and secured while being secured by rotating a fixed shaft with respect to the shaft portion by a predetermined angle.

  According to the present invention, there is no need for an insulating ring for insulating the conductive rings, and there is no need to perform soldering with the lead wire inside the conductive ring, the assemblability is improved, and the cost is low and reliable. High slip ring can be provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an external perspective view of the pan / tilt head device according to the first embodiment of the present invention.

  In FIG. 1, the pan / tilt head device 10 includes a camera unit 11, a main body 12, a pan unit 13, and a tilt unit 17.

  The pan unit 13 rotates in the A1 or A2 direction with respect to the main body 12 with the pan rotation shaft 14 as an axis center. The tilt unit 17 rotates the camera unit 11 in the B1 or B2 direction about the tilt rotation shaft 18 as an axis center.

  FIG. 2 is a side view of the pan / tilt head device of FIG. 1 with the cover of the main body removed.

  In FIG. 2, the slip ring 20 of the present invention is mounted on the pan rotation shaft 14, and the pan unit 13 in which the camera unit 11 is arranged is driven in the direction A 1 or A 2 around the pan rotation shaft 14 by the driving force of the pan motor 16. It is possible to rotate unlimitedly.

  3A and 3B are configuration diagrams of the slip ring according to the first embodiment of the present invention, in which FIG. 3A is a perspective view and FIG. 3B is a cross-sectional view.

  In FIG. 3, the slip ring 20 has 6 pins and the number of signals to be delivered is 6. The bearing portion 26 engaged with the shaft portion 25 is press-fitted and fixed to the conductive brush case 33, and the conductive brush printed wiring board 31 is fixed to the conductive brush case 33 with screws.

  A plurality of (six) conductive brushes 30 and conductive brush connectors 32 electrically connected to a fixed power supply unit are fixed to the printed wiring board 31 for conductive brushes by soldering. Further, the shaft portion 25 serving as the rotation center of the conductive ring fixing shaft 23 and the conductive ring fixing shaft 23 are press-fitted and fixed so that the coaxiality with respect to the rotating shaft is obtained.

  A plurality of (six) conductive rings 21 electrically connected to the pan unit 13 are fixed to the conductive ring fixing shaft 23, and the conductive ring flexible cable 22 is electrically connected inside the conductive ring 21. It is configured.

  With this configuration, when the shaft portion 25 and the bearing portion 26 are engaged, the six conductive brushes 30 and the six conductive rings 21 rotate in the A1 or A2 direction while being in contact with each other and being electrically connected. It becomes possible.

  4A and 4B are diagrams showing a state in which the conductive ring in the slip ring of FIG. 3 is assembled to the conductive ring fixing shaft. FIG. 4A is a perspective view before assembly, and FIG. 4B is a top view showing a transition of the positional relationship between the two. It is.

  In FIG. 4, the conductive ring 21 includes a positioning boss portion 21 a that engages with the positioning hole portion 23 a of the conductive ring fixing shaft 23, and a shaft engaging portion that engages with the shaft engaging slit portion 23 b of the conductive ring fixing shaft 23. 21b and the flexible cable press-contact part 21c are formed.

  A method for fixing the conductive ring 21 to the conductive ring fixing shaft 23 and a method for electrically connecting the conductive ring flexible cable 22 and the conductive ring 21 will be described with reference to FIG.

  The conductive ring fixing shaft 23 is inserted into the conductive brush 21 and is rotated in the C direction so that the positioning hole portion 23a is engaged with the positioning boss portion 21a. At this time, when the shaft engaging portion 21b and the shaft engaging slit portion 23b are engaged, the six conductive rings 21 are regulated and fixed to the conductive ring fixing shaft 23 in the radial direction and the thrust direction. become.

  In such a state, the conductive rings 21 adjacent to each other are secured at a constant interval, and electrical insulation is ensured.

  That is, the slip ring 20 according to the present embodiment rotates and fixes the conductive ring fixing shaft 23 with respect to the shaft portion 25 so that the plurality of conductive rings 21 are positioned and fixed coaxially while ensuring insulation. Has a structure.

  In this state, the flexible cable pressure contact projection 23c of the conductive ring fixing shaft 23 presses the conductive ring flexible cable 22 in the D direction. As a result, the flexible cable 22 for conductive ring and the flexible cable press-contact part 21c of the conductive ring 21 are pressed, and electrical conductivity can be ensured. At this time, since the flexible cable pressure contact portion 21c has a spring property, the conductive cable flexible cable 22 is always in pressure contact.

  By configuring as described above, an insulating ring for insulating the conductive rings from each other becomes unnecessary, and it is not necessary to solder the conductive ring and the lead wire inside the conductive ring.

  5A and 5B are main part configuration diagrams of a slip ring according to a second embodiment of the present invention, in which FIG. 5A is a top view and FIG. 5B is a perspective view.

  In FIG. 5, the conductive ring 40 of the slip ring according to the second embodiment is formed with a protrusion 40 a so as to be fitted in pressure contact with the fitting hole 41 a of the conductive ring flexible cable 41. It has become.

  The protrusion 40a has two protrusions. When the protrusion 40a is engaged with the fitting hole 41a, the protrusion 40a presses the hole-to-hole portion of the fitting hole 41a on the inner surface of the protrusion 40a. It is formed to swallow it. Conductive wire patterns are formed in the inter-hole portions of the fitting hole portions 41a, and electrically stable conductivity is ensured by swallowing while being pressed as described above.

  Similar to the slip ring 20 of the first embodiment of FIG. 4, when the conductive ring fixing shaft 42 is rotated, the flexible cable pressure contact projection 42a of the conductive ring fixing shaft 42 presses the flexible cable 41 in the D direction. To do. Then, the projection 40a and the fitting hole 41a are fitted in a pressure-contacted state, and are completely pressed in the radial direction and the thrust direction with respect to the rotating shaft.

  By configuring in this way, it is possible to ensure a state where the conductive ring 40 and the flexible cable 41 are completely in pressure contact with each other, so that an electrically stable and reliable slip ring that does not cause a short-circuit against vibration or impact can be obtained. realizable.

1 is an external perspective view of a pan / tilt pan head apparatus according to a first embodiment of the present invention. FIG. 2 is a side view of the pan / tilt head device of FIG. 1 with a cover of a main body removed. It is a block diagram of the slip ring which concerns on the 1st Embodiment of this invention. It is a figure which shows the state which assembles | attaches the conductive ring in the slip ring of FIG. 3 to a conductive ring fixed axis | shaft. It is a principal part block diagram of the slip ring which concerns on the 2nd Embodiment of this invention. It is a block diagram of the slip ring which concerns on a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Pan tilt pan head apparatus 11 Camera unit 12 Main body 13 Pan unit 14 Pan rotating shaft 15 Pan bearing part 16 Pan motor 17 Tilt part 18 Tilt rotating shaft 20 Slip ring 21 Conductive ring 21a Positioning boss part 21b Shaft engaging part 21c Flexible cable press contact part 22 Conductive Ring Flexible Cable 23 Conductive Ring Fixed Shaft 23a Positioning Hole 23b Shaft Engaging Slit 23c Flexible Cable Pressing Protrusion 25 Shaft 26 Bearing 30 Conductive Brush 31 Conductive Brush Printed Wiring Board 32 Conductive Brush Connector 33 Conductive brush case 40 Conductive ring 40a Protrusion 41 Flexible cable 41a for conductive ring Fitting hole 42 Conductive ring fixed shaft 42a Flexible cable pressure contact protrusion

Claims (5)

In the slip ring mounted on the pan rotation axis of the pan head device provided with the pan unit in which the camera unit is arranged,
A plurality of conductive rings electrically connected to the pan unit;
A plurality of conductive brushes electrically connected to a fixed power supply;
A conductive ring fixing shaft for fixing the conductive ring;
A shaft portion serving as a rotation center of the conductive ring fixing shaft;
With
A slip ring having a structure in which a plurality of the conductive rings are positioned and fixed coaxially while ensuring insulation by rotating the conductive ring fixing shaft at a predetermined angle with respect to the shaft portion. .   The conductive ring has a shaft engaging portion, the conductive ring fixed shaft has a shaft engaging slit portion, and the shaft engaging portion and the shaft engaging slit portion are engaged with each other, whereby a plurality of the conductive rings are provided. 2. The slip ring according to claim 1, wherein the ring is positioned and fixed on the same axis while ensuring insulation.   The slip ring according to claim 1, wherein the flexible cable electrically connected to the conductive ring has a structure in which the flexible ring is pressed against the conductive ring by rotating the conductive ring fixing shaft.   The conductive ring has a protrusion, the flexible cable has a fitting hole, and the protrusion is fitted into the fitting hole so that the conductive ring and the flexible cable are electrically connected. The slip ring according to claim 3, wherein the slip ring is formed. In the pan head apparatus provided with the pan unit in which the camera unit is arranged,
The slip ring mounted on the pan rotation axis
A plurality of conductive rings electrically connected to the pan unit;
A plurality of conductive brushes electrically connected to a fixed power supply;
A conductive ring fixing shaft for fixing the conductive ring;
A shaft portion serving as a rotation center of the conductive ring fixing shaft;
A plurality of the conductive rings are coaxially positioned and fixed while securing insulation properties by rotating the conductive ring fixing shaft at a predetermined angle with respect to the shaft portion. Pan head device.

Images