JP3976699B2 - Rotation drive - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary drive device for arbitrarily setting the display direction of a screen of video equipment or the like, and more particularly to a rotary drive device that can check the rotation frequency of a rotary mechanism.
[0002]
[Prior art]
Conventionally, as a method for checking this type of operating state, for example, there is a method for determining whether or not a part whose lifetime is reduced by applying a weight to a person can be reused, using a pressure sensor, an infrared sensor, a temperature sensor, etc. Some have recognized the number of uses, use time, weighted history, and the like (see, for example, Patent Document 1).
In addition, as an example of checking the operating environment, built-in IC sensor memory that has a function to detect and store the maximum temperature, minimum temperature, operating time, on / off time, humidity, etc. that affect the life, There is one that detects and stores continuously or periodically and reads the stored data with an external transmitter / receiver to enable comprehensive determination of the product life level (see, for example, Patent Document 2).
[0003]
[Patent Document 1]
Japanese Patent Laying-Open No. 2001-116662 (page 1-4, FIG. 6)
[Patent Document 2]
JP-A-7-306239 (second page, FIG. 1)
[0004]
[Problems to be solved by the invention]
In the above-described prior art, for example, in the case of Patent Document 1, when checking the life of a mechanical component by electric drive, the electrical connection time detection circuit is necessary to record the electrical connection time as the number of times of use, as in this case. As a result, the circuit configuration becomes complicated and the cost is increased. In the case of Patent Document 2, a technique for performing an environmental data detection process using an IC sensor is disclosed. However, the use of an IC sensor still leads to an increase in cost.
[0005]
The object of the present invention is to enable a low cost by adopting a mechanical mechanism with a simple configuration, for example, a rotation frequency suitable for use in a rotation mechanism for arbitrarily setting the display direction of a screen of video equipment, An object of the present invention is to provide a rotary drive device that can detect malfunctions and abnormal parts.
[0006]
[Means for Solving the Problems]
The rotational drive device of the present invention is
A gear box having a drive gear, a drive source that rotationally drives the drive gear, a switch that is turned on / off according to the displacement of the lever, a first member that mounts the gear box, and the first member A driven gear that meshes with the drive gear and an engaging portion that engages with the lever, and the first member according to the rotation of the drive gear A second member that rotates relative to the lever and the engaging portion acts on the lever to turn on / off the switch, and monitors the on / off of the switch, and at least information on the number of on / off times. And a storage unit having a connection unit that stores the on / off frequency information by an external device.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is an exploded perspective view showing a main part configuration of a television receiver according to a first embodiment that employs a rotary drive device according to the present invention, and FIG. 5 shows a television when the individual components of FIG. 1 are combined. It is the front view which looked at the receiver from the front.
[0008]
As shown in FIG. 1, a gear box 3 is attached to a lower surface of a bottom surface portion 2a of a cabinet 2 serving as an outer casing of the television receiver 1 by a mounting screw 3b at a predetermined position described later. On the other hand, a shaft hole 4c is formed in the center of the turntable 4 so that a shaft protrusion 2b that is formed at a substantially center portion of the bottom surface portion 2a of the cabinet 2 and serves as a rotation shaft is fitted therein. The cabinet 2 corresponds to the first member, and the turntable 4 corresponds to the second member.
[0009]
FIG. 2 shows a state in which the bottom portion 2a of the cabinet 2 and the turntable 4 are mounted when the shaft protrusion 2b formed on the bottom portion 2a of the cabinet 2 is fitted into the shaft hole 4c of the turntable 4. It is a plane perspective view which shows the principal part positional relationship. FIG. 3 is a cross-sectional view of the main part when the cross section along the instruction line 100 shown in the plan perspective view of FIG. 2 is viewed from the direction of the arrow A.
[0010]
As shown in FIGS. 1, 2, and 3, a plurality of guide rollers 6 are arranged in the radial direction in the vicinity of the outer periphery of the turntable 4 on a predetermined radius around the rotation center 110. The shaft 7 is held rotatably. On the other hand, a rotating rail 2 c is formed on the lower surface of the bottom surface portion 2 a (FIG. 3) of the cabinet 2 along the same circumference facing the plurality of guide rollers 6 of the turntable 4. Accordingly, when the shaft projection 4b formed on the bottom surface portion 2a of the cabinet 2 is fitted into the shaft hole 4c of the turntable 4, the cabinet 2 has its rotating rail 2c as shown in FIG. Is in contact with a plurality of guide rollers 6 to restrict the movement in the direction of gravity and is held rotatably by the turntable 4 about the rotation center 110.
[0011]
In this state, by fixing the metal plate 5 having a diameter larger than the shaft hole 4a to the tip end of the shaft projection 2b protruding slightly downward from the shaft hole 4c of the turntable 4 with the set screw 5a, The cabinet 2 cannot be separated.
[0012]
Further, the turntable 4 has an outer peripheral wall 4a which is on a predetermined radius around the rotation center 110 and protrudes upward from the bottom flat surface portion 4d and holds one end of the shaft 7 in the inward direction. And an inner peripheral wall 4b which is located on the inner side of the outer peripheral wall 4a and protrudes upward from the flat portion 4d. Further, a driven gear 4e is formed in a predetermined rotation angle region on the inner side surface of the outer peripheral wall 4a. On the other hand, a predetermined number of engaging convex portions 4f as engaging portions are formed at predetermined positions on the outer surface of the inner peripheral wall 4b facing the driven gear 4e with an interval of 5 degrees in rotation angle. .
[0013]
On the other hand, as described above, the gear box 3 attached to the bottom surface portion 2a of the cabinet 2 is connected to the outer peripheral wall 4a in a state where the cabinet 2 is mounted on the turntable 4, as shown in FIGS. It has an arcuate outer peripheral wall 3c that extends between the inner peripheral wall 4b and extends along the outer peripheral wall 4a, and an arcuate inner peripheral wall 3d that extends along the inner peripheral wall 4b.
[0014]
FIG. 4 is an external perspective view showing the external shape of the gear box 3.
[0015]
As shown in the figure, the gear box 3 rotatably holds a drive gear 3a, a part of which faces the outside from an arcuate outer peripheral wall 3c. The drive gear 3 a is rotationally driven by a drive motor as a drive source (not shown) disposed in the gear box 3. The pressing switch 9 is installed in an installation part formed at the end of the arcuate inner peripheral wall 3d of the gear box 3. The press switch 9 is fixed by a pair of snap fits 9b and 9c being fitted and locked in stop holes 3e and 3f formed in the installation portion. At this time, the pressing lever 9a of the pressing switch 9 is positioned so as to protrude inward from the surface of the arc-shaped inner peripheral wall 3d.
[0016]
As shown in FIGS. 2 and 3, the drive gear 3a and the pressing switch 9 of the gear box 3 are disposed when the gear box 3 is disposed between the outer peripheral wall 4a and the inner peripheral wall 4b as described above. Further, the drive gear 3a meshes with the driven gear 4e formed on the outer peripheral wall 4a, and the pressing lever 9a of the pressing switch 9 can be engaged with the engaging convex portion 4f formed on the inner peripheral wall 4b. It is configured as follows.
[0017]
In the above configuration, when the user operates the remote controller of the drive motor control means (not shown) to rotate the drive gear 3a of the gear box 3 clockwise or counterclockwise as viewed from above, according to this rotation, The cabinet 2 rotates in the directions of arrows B and C around the rotation center 110, respectively.
[0018]
Along with the rotation of the cabinet 2, the switch 9 mounted on the gear box 3 is pressed with its pressing lever 9a coming into contact with the engaging convex portion 4f, and a signal indicating on / off due to this pressing is obtained. Output to an external circuit via the lead wire 9d. Note that the switch 9 is turned on / off each time the cabinet 2 rotates 5 degrees at the rotation angle because the engaging projections 4f are formed at intervals of 5 degrees as described above. repeat.
[0019]
FIG. 6 is a schematic block diagram showing an example of a path followed by an on / off signal output from the switch 9.
[0020]
As shown in the figure, a lead wire 9d for transmitting an on / off signal output from a pressing switch 9 attached to a gear box 3 provided in the cabinet 2 is connected to a circuit board 10 provided in the cabinet. To the connector 10a. The circuit board is connected to the connector 10a and inputs the on / off signal, counts the number N of on / off of the push switch 9, stores the count, and further turns on / off time interval T. Is stored in the data storage circuit 11. In the data storage circuit 11, for example, an EEPROM that does not require a power backup is used as means for storing these data.
[0021]
When the television receiver 1 is recycled, the on-board stored in the EEPROM by an external personal computer or the like is disposed on the circuit board 10 and connected to the EEPROM of the data storage circuit 11. / Read off count number N and time interval T data. The data storage circuit 11 and the connector 10b correspond to a storage unit.
[0022]
And, for example, the count number N is the following manufacturer's guaranteed lifetime rotation number x safety factor (including the predicted deterioration factor)
> Number of times the user uses the rotation mechanism (count number N)
If it is determined that the time interval T is normal, it is determined that the gear box 3 can be reused.
[0023]
In the above embodiment, the interval between the engaging projections 4f is not limited to a rotation angle of 5 degrees, and can be appropriately determined according to various circumstances. In the above embodiment, the gear box 3 is mounted on the cabinet 2 and the engaging projection 4f is formed on the turntable 4. However, the present invention is not limited to this, and the gear box 3 is mounted on the turntable 4. The engaging projection 4f may be formed on the cabinet 2, and various other modes can be taken.
[0024]
As described above, according to the rotation driving device of the television receiver 1 of the present embodiment, the frequency of use of the rotation mechanism and the rotation operation failure can be recognized. For example, the television receiver 1 is disassembled and discarded at a recycling center. In this case, it is possible to confirm the wear frequency of the gear box 3 and the quality of the operation, and to determine whether or not the gear box 3 can be reused.
[0025]
【The invention's effect】
According to the rotary drive device of the present invention, it is possible to recognize the frequency of use of the rotation mechanism of the device and the defective rotation operation. Therefore, at the recycling center, it is possible to confirm whether the gear box is consumed and the gear box is defective when disassembled or discarded. Therefore, the reusable gearbox can be effectively used without being discarded.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a main configuration of a television receiver according to a first embodiment that employs a rotary drive device according to the present invention.
FIG. 2 is a perspective plan view showing the positional relationship between the main part of the bottom surface 2a of the cabinet 2 and the turntable 4. FIG.
3 is a cross-sectional view of the main part when a cross section taken along an instruction line 100 shown in the plan perspective view of FIG. 2 is viewed from the direction of arrow A. FIG.
4 is an external perspective view showing an external shape of the gear box 3. FIG.
5 is a front view of the television receiver viewed from the front when the individual components of FIG. 1 are combined.
6 is a schematic block diagram showing an example of a path followed by an on / off signal output from a switch 9. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Television receiver, 2 Cabinet, 2a Bottom surface part, 2b Shaft protrusion, 2c Rail for rotation, 3 Gear box, 3a Drive gear, 3b Mounting screw, 3c Arc-shaped outer peripheral wall, 3d Arc-shaped inner peripheral wall, 3e, 3f Stop hole , 4 turntable, 4a outer peripheral wall, 4b inner peripheral wall, 4c shaft hole, 4d bottom plane part, 4e driven gear, 4f engaging convex part, 5 sheet metal, 5a set screw, 6 guide roller, 7 rotating shaft, 9 pressure switch , 9a pressing lever, 9b, 9c snap fit, 9d lead wire, 10 circuit board, 10a, 10b connector, 11 data storage circuit.

Claims (5)

A gear box having a drive gear, a drive source that rotationally drives the drive gear, and a switch that is turned on / off according to the displacement of the lever;
A first member for mounting the gear box;
The first member is rotatably coupled to the first member, and includes a driven gear that meshes with the drive gear and an engagement portion that engages the lever, and according to the rotation of the drive gear, A second member that rotates relative to the first member and the engaging portion acts on the lever to turn the switch on and off;
A rotary drive device comprising: a storage unit that stores at least information on the number of on / off times of the switch and has a connection unit that allows the on / off number information to be captured by an external device. The rotary drive device according to claim 1, wherein the storage unit further stores time on / off time information of the switch. 2. The rotary drive device according to claim 1, wherein an EEPROM is used as the storage means of the storage unit. The rotary drive device according to any one of claims 1 to 3, wherein the first member is a cabinet of a display device, and the second member is a turntable of the cabinet. The rotation drive device according to claim 4, wherein the storage unit is provided on a circuit board disposed in the cabinet.

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