JP2008210693A - Slip ring of universal head device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a slip ring with a small footprint which does not have excessively increased load torque, is easy in assembling performance and of low cost. <P>SOLUTION: The slip ring of a universal head device has a plurality of conductive rings at a rotary mechanism part and a plurality of conductive brushes at a fixed part, and the conductive rings are arranged in concentric circle form to a rotating shaft, and the contact face to contact the conductive brushes is formed in the same direction as the rotating shaft. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is used in a pan head device having a driving unit for driving a camera unit in a pan direction or a tilt direction, and is mounted with an imaging device such as a digital camera and drives the digital camera at least in the pan direction. The present invention relates to a structure of a slip ring having a plurality of conductive rings electrically connected to a rotating mechanism part and a plurality of conductive brushes electrically connected to a fixed power source part.

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

  Thus, when tracking a moving object such as a human, the pan head device with a limited rotation angle has also had 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 Patent Document 1).

  FIG. 7 is a diagram showing the configuration of the above-described slip ring (conventional example 1; see Patent Document 2), and FIG. 8 is a diagram showing the configuration of another type of slip ring (conventional example 2; Patent Document 2). 3).

  First, the configuration of Conventional Example 1 will be described with reference to FIG.

  The slip ring 50 of the conventional example 1 is configured to transmit a 6-pin signal, and is soldered to the conductive pattern 52 and the conductive brush printed wiring board 55 printed on the printed wiring board 51 concentrically. Signals are transmitted by contacting the mounted conductive brush 54. A connector 53 is mounted on the printed wiring board 51 and is press-fitted and fixed to the shaft portion 57. A connector 56 is mounted on the conductive brush printed wiring board 55 on which the conductive brush 54 is mounted, and is press-fitted and fixed to the bearing portion 58.

  When the shaft portion 57 and the bearing portion 58 are engaged and rotated, the conductive brush 54 is electrically connected to the conductive pattern 52 while being in contact therewith, so that a signal can be transmitted.

  Next, the configuration of Conventional Example 2 will be described with reference to FIG.

  Similarly to FIG. 7, the slip ring 60 of the conventional example 2 is configured to transmit a 6-pin signal. When the conductive ring 61 and the conductive brush 65 come into contact with each other, the slip ring 60 is electrically connected to transmit the signal. .

  The conductive ring 61 is assembled so as to be arranged in the same circular shape in the axial direction while sandwiching the insulating ring 62 in the conductive ring bearing portion 63 having insulating properties. The insulating ring 62 assembled at this time is a member for preventing the adjacent conductive rings 61 from being in electrical contact with each other. Further, the lead wire 64 is soldered to the assembled conductive ring 61 by an internal soldering portion 64a to be electrically connected.

  The conductive brush 65 is axially arranged and fixed to the conductive brush fixing case 67 so as to face the conductive ring 61, and the connection pin 66 is attached to the conductive brush 65 from the outside so that it can be electrically connected to the outside. It has become. Further, a shaft portion 68 is press-fitted and fixed to the conductive brush fixing case 67.

When the shaft portion 68 and the conductive ring bearing portion 63 are engaged and rotated, the conductive ring 61 and the conductive brush 65 are electrically connected while being in contact with each other, and a signal can be transmitted.
JP 2000-4384 A Japanese Patent Registration No. 3631990 JP 2000-77150 A

  However, in the slip ring 50 of the conventional example 1 as described above, the innermost conductive brush 54-1 is in contact with the conductive pattern 52-1, and the outermost conductive brush 54-6 is the conductive pattern 52-. 6 is compared with the case of contacting with the center, the distance from the center of the rotation axis to the contact position is radius R1 and R6, respectively, and F × R6> F × R1 when the contact pressure of the conductive brush is F. The further away the conductive brush 54 from 57, the greater the torque required for rotation.

  In addition, since the contact portion between the conductive pattern 52 and the conductive brush 54 spreads concentrically, when the number of signals to be transferred increases, a space is required on the circumference, and the torque also increases. There was a problem of end.

  Further, in the slip ring 60 of the conventional example 2, since the conductive ring 61 is arranged in the same circular shape and in the axial direction, if the number of signals increases, the space increases in the axial direction.

  Further, since the lead wire 64 is soldered on the inner diameter side of the conductive ring 61, there is a problem that workability is poor and assembly man-hours are required.

  In view of such technical drawbacks, the present invention provides a rotating mechanism that mounts and rotates a camera unit in a slip ring of a pan / tilt head device having a camera unit and driving means for driving the camera unit in a pan direction and a tilt direction. A plurality of conductive rings electrically connected to the power supply section and a plurality of conductive brushes electrically connected to the fixed power supply section, the conductive rings being arranged concentrically with respect to the rotation axis, and the conductive brush The contact surface in contact with the rotation axis is arranged in the same direction as the rotation axis with respect to the rotation axis.

  Moreover, the conductive brush was configured to have a T-shape so as to have elasticity in the rotation direction.

  Further, the conductive brush positions are arranged so that the contact positions of the conductive brush and the conductive ring are different from each other in angular positions with respect to the rotation axis.

  In addition, the conductive ring is integrally formed by drawing a single metal plate, and by cutting the connecting portion of the conductive ring portion after being soldered to the printed wiring board that fixes the conductive ring by soldering, A plurality of conductive rings were formed to be electrically independent wirings.

  In addition, the conductive brush is integrally formed by drawing a single metal plate, and by cutting the connecting portion of the conductive brush portion after being soldered to the printed wiring board on which the conductive brush is fixed by soldering, A plurality of conductive brushes were formed to be electrically independent wirings.

  According to the present invention, the camera unit has a plurality of conductive rings electrically connected to a rotating mechanism unit that rotates by rotating a camera unit, and a plurality of conductive brushes electrically connected to a fixed power source unit. Since the ring is arranged concentrically with respect to the rotation axis, and the contact surface in contact with the conductive brush is arranged in the same direction as the rotation axis with respect to the rotation axis, the number of signals as in Conventional Example 1 is increased. The space expands in an excessively circumferential manner in proportion to the torque, the torque does not increase excessively, and the space does not increase in the axial direction as in the conventional example 2, and the space-saving slip ring Can be realized.

  Further, the conductive ring and the conductive brush are formed by integrally forming a single metal plate by drawing, and after being fixed to the printed wiring board to which the conductive ring is soldered, the connecting portion of the conductive ring and the conductive brush By cutting the connecting portion, the plurality of conductive rings and conductive brushes are electrically independent, so that there is no need to solder the conductive ring and the lead wire inside the conductive ring as in Conventional Example 2, Since it can be processed, a highly accurate coaxiality can be achieved, so that it is possible to provide a slip ring with good assembling, low cost and high performance.

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

  FIG. 1 is an external perspective view of a pan / tilt head when the slip ring according to the first embodiment of the present invention is mounted.

  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.

  Next, FIG. 2 is a side view of the state where the cover of the main body is removed from FIG.

  The slip ring 20 according to the first embodiment of the present invention is mounted on the pan bearing portion 15 of the pan rotation shaft 14, and the pan unit 13 in which the camera unit 11 is arranged is driven by the driving force of the pan motor 16. It is possible to rotate endlessly in the A1 or A2 direction around the center.

  Next, the configuration of the slip ring according to the first embodiment of the present invention will be described with reference to FIG.

  The perspective view of FIG. 3 shows the slip ring 20 of the first embodiment of the present invention. The slip ring 20 is composed of 6 pins for the number of signals to be delivered.

  A bearing portion 26 is press-fitted and fixed to a bearing base plate 27 disposed in the main body 12, and the shaft portion 25 is engaged with the bearing portion 26.

  The bearing portion 26 and the conductive brush printed wiring board 31 are press-fitted and fixed, and the conductive brush 30 and the connector 32 are mounted on the conductive brush printed wiring board 31 by soldering.

  Similarly, the shaft portion 25 and the conductive ring printed wiring board 22 are press-fitted and fixed, and the conductive ring 21 and the connector 23 are mounted on the conductive ring printed wiring board 22 by soldering.

  When the shaft portion 25 rotates in the A1 or A2 direction around the pan rotation shaft 14 with respect to the bearing portion 26, the conductive ring 21 and the conductive brush 30 are configured to ensure electrical conduction while being in contact with each other. .

  Next, the conductive ring and the conductive brush, which are the features of the slip ring according to the first embodiment of the present invention, will be described with reference to FIG.

  4 is a perspective view and a top view showing a state in which the conductive brush 30 is in contact with the conductive ring 21 described in FIG.

  As shown in the perspective view of FIG. 4, the conductive ring 21 is mounted on the printed wiring board 22 for the conductive ring around the shaft portion 25. Here, the conductive ring 21 has an L shape when taken in cross section, and is configured to contact the conductive brush 30 at a contact portion 30 a on a surface perpendicular to the printed wiring board 22.

  By configuring in this way, the contact surface is secured by the contact portion 30a of the axial surface, so that even if a sufficient contact surface is secured, no space is required on the circumferential surface, and the spacing between the conductive rings 21 Can be reduced, and there is no concern that the load torque will increase excessively due to the circumferential expansion of the space.

  Further, since the space does not increase in the axial direction, it is possible to configure a slip ring with good performance and space saving.

  Furthermore, the shape of the conductive brush 30 and the arrangement of the conductive brush 30 will be described with reference to the top view of FIG.

  The conductive brush 30 has a T-shape so as to have elasticity in the rotation direction.

  By adopting such a shape, when rotating in the A1 direction or A2 direction, even if the contact load with the conductive ring 21 increases, it can be elastically deformed in the C direction, and the contact load can be reduced. It becomes.

  Further, as in the arrangement of the top view of FIG. 4, the contact positions of the conductive brush 30 and the conductive ring 21 are arranged so that the angular positions are different from each other with respect to the rotation axis. Thus, by disperse | distributing and arrange | positioning in the circumferential direction, the danger that the adjacent conductive brush 30 will mutually contact reduces, and electrical reliability improves.

  FIG. 5 is an assembly view and a top view for explaining the characteristics of the ring portion of the slip ring according to the second embodiment of the present invention.

  In the conductive ring 40 of the second embodiment of the present invention, a ring portion having a signal number of 6 pins is integrally formed by drawing a single metal plate.

  The integrally formed conductive ring 40 is soldered by being mounted on the conductive ring printed wiring board 41 and then flowing in a solder bath.

  After being soldered, the cut portions 40a (three places) of the conductive ring shown in the top view are cut, whereby each ring portion is electrically cut off, and an independent conductive ring can be formed.

  With this configuration, it is not necessary to solder the lead wire to the ring portion, and since it is configured integrally, the coaxiality with respect to the shaft portion can be realized with high accuracy and the assemblability is improved. A good, inexpensive and high performance slip ring can be realized.

  Similarly, the configuration of the brush portion will be described with reference to FIG.

  FIGS. 6A and 6B are an assembled view and a top view for explaining the features of the brush portion of the slip ring according to the second embodiment of the present invention.

  In the conductive brush 42 according to the second embodiment of the present invention, a brush portion having a signal number of 6 pins is integrally formed by drawing a single metal plate.

  The integrally formed conductive brush 42 is soldered by being mounted on a conductive brush printed wiring board 43 and then flowing in a solder bath.

  After being soldered, each of the brush portions is electrically cut off by cutting the cut portions 42a (five locations) of the conductive brush shown in the top view, and an independent conductive brush can be configured.

  By configuring in this way, the brush part is constructed integrally, so that the coaxiality with respect to the shaft part can be realized with high accuracy, and it is easy to assemble by combining with the conductive ring part of FIG. It is possible to realize a slip ring with good performance, low cost and good performance.

It is an external appearance perspective view of a pan / tilt head when the slip ring according to the first embodiment of the present invention is mounted. It is a side view of a pan / tilt head when the slip ring according to the first embodiment of the present invention is mounted. (With the cover removed) It is the perspective view and sectional drawing of the slip ring by 1st Example of this invention. It is the perspective view and top view for demonstrating the ring part and brush part of the slip ring by 1st Example of this invention. It is the assembly figure and top view for demonstrating the ring part of the slip ring by the 2nd Example of this invention. It is the assembly figure and top view for demonstrating the brush part of the slip ring by the 2nd Example of this invention. It is the perspective view, front view, and exploded view for demonstrating the structure of the slip ring of the prior art example 1. FIG. It is the perspective view for demonstrating the structure of the slip ring of the prior art example 2, a top view, and an exploded view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Pan tilt pan head apparatus of 1st Example 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 of 1st Example 21 Conductive ring 22 Printed wiring board for conductive ring 23 Connector for conductive ring 25 Shaft part 26 Bearing part 27 Bearing base board 30 Conductive brush 30a Contact part of conductive brush 31 Printed wiring board for conductive brush 32 Conductive brush connector 40 Slip of the second embodiment Conductive ring of ring 40a Cut portion of conductive ring of second embodiment 41 Printed wiring board for conductive ring of slip ring of second embodiment 42 Conductive brush of slip ring of second embodiment 42a Second embodiment Cut portion of the conductive brush 43 of the second embodiment slip Printed circuit board for conductive brush 50 Slip ring of Conventional Example 1 51 Printed Circuit Board of Conventional Example 1 52 Conductive Pattern on Printed Circuit Board of Conventional Example 1 52-1 1st Inside Conductive Pattern 52-6 1st Outside Conductive pattern 53 Printed wiring board connector of conventional example 1 54 Conductive brush of conventional example 55-1 Conductive brush inside 1 54-6 Conductive brush outside 1 55 Printed wiring board for conductive brush of conventional example 56 Conventional Example 1 Conductive Brush Connector 57 Conventional Example 1 Shaft 58 Conventional Example 1 Bearing 60 Conventional Example 2 Slip Ring 61 Conventional Example 2 Conductive Ring 62 Conventional Example 2 Insulating Ring 63 Conventional Example 2 Conductive Ring Bearing 64 Lead Wire of Conventional Example 64 64a Lead Wire Soldering Portion of Conventional Example 65 Conductive Brush of Conventional Example 2 66 Conductive Brush Connection Pin of Conventional Example 2 67 Conventional Example 2 Conductive Brush Fixing Case 68 Conventional Example 2 Shaft Part 69 Conventional Example 2 Rotating Shaft Base Plate

Claims (5)

  In a slip ring of a pan / tilt head device having a camera unit and a driving unit for driving the camera unit in a pan direction and a tilt direction, a plurality of units electrically connected to a rotation mechanism unit that mounts and rotates the camera unit A plurality of conductive brushes electrically connected to the power supply unit fixed to the conductive ring, and the conductive ring is disposed concentrically with respect to the rotating shaft, and a contact surface that contacts the conductive brush is provided. A slip ring for a pan / tilt head device, wherein the slip ring is formed in the same direction as the rotation axis with respect to the rotation axis.   The slip ring of the pan head apparatus according to claim 1, wherein the conductive brush has a T-shape so as to have elasticity in the rotation direction.   3. The pan head apparatus according to claim 1, wherein the conductive brush positions are arranged so that the contact positions of the conductive brush and the conductive ring are different in angular position with respect to the rotation axis. Slip ring.   The conductive ring is integrally formed by drawing a single metal plate, and after being soldered to the printed wiring board for fixing the conductive ring, by cutting the connecting portion of the conductive ring portion, The slip ring of the pan / tilt head device according to claim 1, wherein the plurality of conductive rings are formed to be electrically independent wirings.   The conductive brush is formed by integrally forming a single metal plate by drawing, and by cutting the connecting portion of the conductive brush portion after being soldered to a printed wiring board on which the conductive brush is fixed by soldering, The slip ring of the pan / tilt head device according to claim 1, wherein the plurality of conductive brushes are formed in electrically independent wiring.

Images