JP4040399B2 - Rotational resistance force generation mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotational resistance generating mechanism that generates rotational resistance on a rotating body that rotates about a shaft.
[0002]
[Prior art]
A remote control tank, which is one of the self-propelled toys, consists of a vehicle part that self-propels in an endless track system and a turret part that is mounted on the vehicle part, just like an actual vehicle. It is structured to turn manually or automatically in order to raise, specifically, a vertical shaft provided on the vehicle part side is inserted from below into a vertical through hole provided on the turret part side The structure is common.
[0003]
When the revolving turret part of the remote control tank is a manual type, it is necessary to fix the turret part at an arbitrary rotational operation position. Further, in the case of the automatic turning type, it is necessary to remove rattling. For these reasons, it is necessary to generate a rotational resistance force when turning the turret portion, which is a rotating body, whether manually operated or automatically turned.
[0004]
As a means for generating a rotational resistance force in the turret portion, for example, a resin washer is used. That is, the cylindrical portion around the through hole provided in the turret portion is made slightly higher than the inner shaft portion, and a resin washer is screwed to the end surface of the inner shaft portion, and the end surface of the cylindrical portion is fixed with the resin washer. It is a structure that presses elastically. A mechanism using a felt or a spring washer instead of a resin washer is also known as a rotational resistance generating mechanism.
[0005]
[Problems to be solved by the invention]
However, these conventional rotational resistance generating mechanisms have the following problems.
[0006]
In the structure in which the end face of the tubular part on the turret side is pressed with a resin washer screwed to the end face of the shaft part on the vehicle side, the resin washer contacts the entire end face of the tubular part, and the contact area increases, so friction It becomes a problem that power becomes too big. As a result, in the manual operation type, a large force is required for the operation, and the operability is deteriorated. In the case of the automatic turning type, a large driving torque is required, and the enlargement of the driving mechanism becomes a problem. Also, wear of each component becomes a problem.
[0007]
When felt is used in place of the resin washer, the thickness is increased, making it difficult to reduce the thickness. Further, the tolerance is as large as 0.6 to 0.7 mm, for example, and the rotational resistance force varies. A holding member is required, and the number of parts increases. Incidentally, if the rotational resistance varies, it is difficult to align the rotational position in the case of manual operation. In the case of the automatic turning type, the rotation speed becomes unstable.
[0008]
On the other hand, the spring washer is expensive and unsuitable for thinning, and further, there is a risk of scraping the end face of the tubular portion on the turret side.
[0009]
The present invention was devised in view of such circumstances, and an object of the present invention is to provide a rotational resistance generating mechanism that can generate a stable rotational resistance with a small number of components and is also suitable for thinning. There is.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a rotational resistance force generation mechanism according to the present invention is a rotational resistance force generation mechanism that generates a rotational resistance force on a rotating body that rotates about a shaft portion, and is provided on the rotating body. And a cylindrical portion having a through-hole into which the shaft portion is inserted, and an end surface of the cylindrical portion on the insertion direction side of the shaft portion, provided at predetermined intervals in the circumferential direction, and the position of the apex is A plurality of convex portions higher than the position of the tip surface of the shaft portion, and a member whose outer shape is larger than the shape of the tip surface of the shaft portion, the inner portion being fixed to the tip surface of the shaft portion, and the outer portion There has been provided with a pressing member for pressing a plurality of the convex portion elastically, the.
[0011]
In the rotational resistance generating mechanism according to the present invention, a plurality of convex portions are formed at predetermined intervals in the circumferential direction on the end surface of the cylindrical portion formed on the rotating body, and the top level of each convex portion is the end surface of the shaft portion. It is set higher than the level. For this reason, when the pressing member made of a flexible material is fixed to the end surface of the shaft portion, the pressing member is pressed against each convex portion to bend according to the level difference, and the reaction force corresponding to the magnitude of the bending To elastically press each convex portion. Thereby, the cylindrical portion is fixed in the axial direction, and a rotational resistance force is generated. The pressing member does not come into surface contact with the end surface of the cylindrical portion, but comes into contact with a plurality of convex portions provided on the end surface, so that the contact area can be reduced and the contact area can be easily and widely adjusted. be able to.
[0012]
The shape of the plurality of convex portions formed on the end surface of the cylindrical portion is a tapered shape such as a hemispherical shape whose cross-sectional area gradually decreases toward the tip, a cone shape, a pyramid shape, or a trapezoid shape obtained by removing the tip portion of the pyramid shape. Is preferred.
[0013]
The pressing member is preferably a resin washer from the viewpoint of economy and thinning, and the mounting structure of the resin washer is preferably screwed to the end face of the shaft portion from the viewpoint of mounting workability and cost.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view of a remote control tank using a rotational resistance generating mechanism according to an embodiment of the present invention, FIG. 2 is another perspective view of the remote control tank, and FIG. 3 is still another perspective view of the remote control tank. 4 is another perspective view of the remote control tank, FIG. 5 is a longitudinal side view of the remote control tank, FIG. 6 is a perspective view of a rotational resistance generating mechanism used in the remote control tank, and FIG. FIG. 8 is a perspective view showing a vehicle side portion of the rotational resistance generating mechanism, FIG. 9 is a perspective view showing a turret side portion of the rotational resistance generating mechanism, and FIG. FIG. 5 is a perspective view showing a state in which a turret side portion is combined with a vehicle side portion.
[0015]
The rotation resistance generating mechanism according to the embodiment of the present invention is used in a turret support portion of a remote control tank that is a kind of remote control type self-propelled toy. This remote control tank plays a battle game by remote control using infrared rays. The outline of the remote control tank will be briefly described with reference to FIGS.
[0016]
The remote control tank includes a vehicle part A configured by covering a chassis 10 with a cabinet 20 and a turret part B attached on the vehicle part A. The turret part B is a rotator according to the present invention, and more directly, a lower case 30 described later constituting the turret part B is a rotator.
[0017]
The chassis 10 of the vehicle part A is a ship-shaped resin formed body. On both sides of the shear 10, a set of drive wheels 11a, 11a on both sides is attached at the rearmost part. A plurality of large-diameter driven wheels 11c... Are provided between the rearmost driving wheel 11a and the frontmost driven wheel 11b, and a rubber endless belt 12 is wound around them. The endless belts 12 and 12 on both sides are driven to rotate independently by transmitting the rotation of a pair of motors 13 mounted in the rear part of the chassis 10 to the driving wheels 11a on each side via gears.
[0018]
In the chassis 10, a main board 15 is horizontally fixed from the front part to the center part of the bottom plate part 14. Various other electrical / electronic components are mounted on the surface of the main board 15 together with the slide switch 16 as a power switch, and various electrical / electronic components are also mounted on the back surface. The slide switch 16 is mounted on the front surface of the main board 15 with the operation portion 16 b facing upward. The slide switch 16 is operated on the rear surface side of the chassis 10 by the key top 17 combined with the slide switch 16. Reference numeral 17 f denotes an operation portion of the key top 17, which protrudes from the back side of the chassis 10.
[0019]
On the back surface of the chassis 10, charging terminal portions 18 and 18 are also provided on both sides of the bottom plate portion 14. The terminal portions 18 and 18 are electrically connected to the main board 15 in the chassis 10, and the battery mounted in the chassis 10 is charged via the main board 16 by being connected to a charger (not shown). To do.
[0020]
The cabinet 20 is a resin cover with an open bottom surface that covers the chassis 10, and is connected and fixed to the chassis 10 with screws 22. A central portion of the cabinet 20 is a substantially horizontal top plate portion 21. The top plate portion 21 is provided with a vertical shaft portion 23 protruding upward for connection with a turret portion B described later.
[0021]
The turret portion B includes a lower case 30, an upper case 40 that covers the lower case 30, and a gun barrel 50 that is attached to the front portion so as to be sandwiched between both cases.
[0022]
A vertical through hole into which the shaft portion 23 is inserted is provided at the center of the lower case 30, and an annular portion 32 is provided concentrically so as to surround the cylindrical portion 31 around the through hole. The inner peripheral surface of the rear half of the annular portion 32 is an internal gear 33. Then, the tubular portion 31 is externally fitted to the shaft portion 23, and the resin washer 24 is fixed to the upper end surface of the shaft portion 23 with the screw 25, whereby the tubular portion 31 is fixed in the axial direction, and the lower case 30 is While being rotatably connected to the cabinet 20, a predetermined rotational resistance force is applied to the lower case 30.
[0023]
On the other hand, the upper case 40 is provided with an infrared light receiving unit 41 for remote operation, and a light receiving sensor is disposed in the back thereof.
[0024]
In the front part of the turret part B, an infrared light emitting part 51 is provided on the side of the gun barrel 50. The infrared light emitting unit 51 is located between the lower case 30 and the upper case 40, and an infrared lamp is disposed in the back thereof. The infrared lamp is a bombardment operation unit that operates in response to a bombardment operation, and is mounted on the sub-board 34 on the lower case 30 together with a light receiving sensor disposed in the back of the infrared light receiving unit 41. The sub board 34 and the main board 15 in the chassis 10 are electrically connected by lead wires.
[0025]
The operation of the remote control tank will be briefly described. When a controller (not shown) is operated, an infrared signal corresponding to the operation is transmitted from the controller. When this signal is received by the infrared light receiving section 41 of the turret section B, the remote control tank executes an operation corresponding to the signal. Specifically, the endless belts 12 and 12 on both sides are independently driven to move forward, backward, and change direction, and the infrared light emitting unit 51 is operated in response to the bombardment operation. By such an operation, the opponent's remote control tank is tracked and fired.
[0026]
When the opponent's remote control tank is fired, the infrared light emitted from the infrared light emitting unit 51 is received by the infrared light receiving unit 41. The remote control tank that received the bombardment continues to turn, for example, at a fixed position as an operation assuming damage caused by the bombardment.
[0027]
Thus, a battle game using a tank is performed. The turret portion B is manually turned. A turret turning motor is mounted on the vehicle portion A, and a spur gear meshing with an internal gear 33 provided on the inner peripheral surface of the rear half of the annular portion 32 of the lower case 30 is provided. By driving with a motor, the turning operation of the turret B can also be performed remotely.
[0028]
The above is the outline of the remote control tank using the rotational resistance generating mechanism according to the embodiment of the present invention. Hereinafter, the rotation resistance generating mechanism incorporated in the remote control tank will be described in detail with reference to FIGS.
[0029]
As shown in FIGS. 6 and 7, the rotational resistance generating mechanism according to the embodiment of the present invention includes a shaft portion 23 provided perpendicular to the top plate portion 21 of the cabinet 20 constituting the vehicle portion A, and a turret portion. A vertical cylindrical portion 31 that is provided in the lower case 30 constituting B and into which the shaft portion 23 is inserted from below, and is fixed to the upper end surface of the shaft portion 23 by screws 25 to fix the cylindrical portion 31 in the axial direction. And a resin washer 24.
[0030]
As shown in FIGS. 7 and 8, the shaft portion 23 provided on the cabinet 20 side is a cylindrical body that protrudes upward from the center portion of the circular horizontal seat portion 29 provided on the top plate portion 21. A screw hole 23a into which the screw 25 is screwed is provided at the center of the upper end surface. A fixed side stopper 26 for restricting the rotation angle of the lower case 30 is provided on the horizontal seat portion 29 so as to protrude behind the shaft portion 23, and the lower case 30 is provided further rearward of the fixed side stopper 26. An insertion hole 27 for a spur gear for rotational driving is provided. On the other hand, a wiring passage hole 28 through which a lead wire for electrically connecting the main board 15 in the vehicle part A and the sub-board 34 in the turret part B passes is provided in front of the shaft part 23.
[0031]
As shown in FIGS. 7 and 9, the cylindrical portion 31 provided on the lower case 30 side of the turret portion B is provided perpendicularly to a substantially central portion of the bottom plate portion of the lower case 30, and the inside thereof is The shaft portion 23 is a vertical through hole 31a into which the shaft portion 23 is rotatably inserted from below. On the upper end surface of the cylindrical portion 31, a plurality (four in this case) of convex portions 31 b having a hemispherical shape (dome shape) are projected at equal intervals in the circumferential direction. And the vertex level of the some convex part 31b is designed a little higher than the upper end surface level of the axial part 23 inserted in the through-hole 31a in the cylindrical part 31, as shown in FIG. More specifically, the upper end surface level of the shaft portion 23 inserted into the through hole 31a in the tubular portion 31 is set higher than the upper end surface level of the tubular portion 31 and lower than the vertex level of the plurality of convex portions 31b. It has been.
[0032]
An annular portion 32 provided concentrically on the outside of the cylindrical portion 31 is a rotating base that slides on the outer peripheral portion of the horizontal seat portion 29, and the rear half portion is an internal gear 33. Inside the annular portion 32, a pair of radial walls 35, 35 that reach the annular portion 32 from both side portions of the cylindrical portion 31 are used as rotation side stoppers that contact the stopper 26 at the rotation limit of the lower case 30. Is provided. A semicircular top plate portion 36 is provided behind the wall portions 35 and 35. A plurality of pins 37 that support the sub-board 34 protrude from the top plate portion 36, and a plurality of pins for positioning the upper case 40 are provided on the surface of the lower case 30 outside the annular portion 32. A pin 38 is projected. A semicircular space formed in front of the top plate portion 36 is a wiring passage hole 39 on the rotation side.
[0033]
As shown in FIGS. 6 and 7, the resin washer 24 has an outer diameter that is substantially the same as that of the cylindrical portion 31 and an inner diameter that is substantially the same as the screw hole 23 a of the shaft portion 23 inserted into the through hole 31 a in the cylindrical portion 31. And is tightly fixed to the upper end surface by screwing a screw 25 into the screw hole 23a in a state of being overlapped with the upper end surface of the shaft portion 23.
[0034]
The function of the rotational resistance generating mechanism configured as described above is as follows.
[0035]
The lower case 30 that is a rotating body rotates around the shaft portion 23 on the horizontal seat portion 29 of the cabinet 20 that is a fixed body. The resin washer 24 fixed to the upper end surface of the shaft portion 23 has flexibility. Further, the upper end surface of the shaft portion 23 is higher than the upper end surface of the outer cylindrical portion 31 and lower than the apexes of the plurality of convex portions 31b provided on the upper end surface. For this reason, the resin washer 24 is pressed against the plurality of convex portions 31b provided on the upper end surface of the cylindrical portion 31, and comes into contact with the cylindrical portion 31 only in the vicinity of each vertex of the plurality of convex portions 31b, and the shaft portion. The bending (elastic deformation) according to the level difference between the upper end surface of 23 and each vertex of the plurality of convex portions 31b is generated, and the plurality of convex portions 31b are elastically pressed by the reaction force.
[0036]
According to such a pressing, first, the cylindrical portion 31 that is externally fitted to the shaft portion 23 is fixed in the axial direction, and the lower case 30 that constitutes the turret portion B, and thus the turret portion B is prevented from coming off. Become.
[0037]
Second, a frictional force is generated between the plurality of convex portions 31b and the resin washer 24, and a rotational resistance force is generated when the cylindrical portion 31 rotates. Here, since the resin washer 24 is not in surface contact with the entire upper end surface of the cylindrical portion 31 and is in partial contact with the vicinity of each vertex of the plurality of convex portions 31b, the contact area with the cylindrical portion 31 Is small. For this reason, rotation resistance can be suppressed comparatively small. In addition, the rotational resistance is more stable than felt. Furthermore, the contact area can be adjusted over a wide range by changing the top shape of the convex portion 31b, the level difference from the upper end surface of the shaft portion 23 to the apex of the convex portion 31b, the thickness and material of the resin washer 24, etc. The adjustment is easy.
[0038]
Thirdly, it is thinner than the spring washer, can contribute to a reduction in thickness, and there is no risk of damaging the tubular portion 31.
[0039]
And since rotation resistance force can be stably suppressed small, when rotating the turret part B manually, rotation operation becomes easy and smooth, and it can be arbitrarily stopped at a rotation position arbitrarily. When the turret B is rotated electrically, the operation becomes smooth, and the drive mechanism can be downsized and the electric capacity can be reduced.
[0040]
In the above embodiment, the present invention is applied to a turret support portion in a remote control tank for a battle game. However, the application is not limited, and the present invention is widely applied to rotating body support portions such as other self-propelled toys. Is possible.
[0041]
【The invention's effect】
As described above, the rotational resistance generation mechanism according to the present invention inserts a shaft portion into a cylindrical portion formed in a rotating body, and fixes a flexible pressing member to an end surface of the shaft portion, In elastically pressing the end surface of the tubular portion, the pressing member can be partially brought into contact with the end surface of the tubular portion by forming a plurality of convex portions at predetermined intervals in the circumferential direction on the end surface of the tubular portion. Therefore, a stable rotational resistance force can be generated with a small number of parts, which is suitable for thinning.
[Brief description of the drawings]
FIG. 1 is a perspective view of a remote control tank using a thin slide switch mechanism according to an embodiment of the present invention.
FIG. 2 is another perspective view of the remote control tank.
FIG. 3 is still another perspective view of the remote control tank.
FIG. 4 is still another perspective view of the remote control tank.
FIG. 5 is a vertical side view of the remote control tank.
FIG. 6 is a perspective view of a rotation resistance generating mechanism used in the remote control tank.
FIG. 7 is a perspective view showing the rotational resistance force generating mechanism in a cutaway manner.
FIG. 8 is a perspective view showing a vehicle side portion of the rotational resistance generating mechanism.
FIG. 9 is a perspective view showing a portion on the turret side of the rotational resistance generating mechanism.
FIG. 10 is a perspective view showing a state in which a turret side portion is combined with a vehicle side portion.
[Explanation of symbols]
A Vehicle part B Turret part 10 Chassis 11a Drive wheel 11b, 11c Driven wheel 12 Endless belt 13 Motor 14 Bottom plate part 15 of chassis 10 Main board 16 Slide switch 16b Operation part 17 Key top 17f Operation part 18 Terminal part 20 Cabinet 21 Top panel Part 22 Screw 23 Shaft part 23a Screw hole 24 Resin washer (pressing member)
25 Screw 26 Stopper 27 Spur gear insertion hole 28 Wiring passage hole 29 Horizontal seat portion 30 Lower case 31 Tubular portion 31a Through hole 31b Protruding portion 32 Annular portion 33 Internal gear 34 Sub-board 35 Wall portion 36 Top plate portions 37, 38 Pin 39 Wiring passage hole 40 Upper case 41 Infrared light receiving part 50 Gun barrel 51 Light emitting part

Claims (4)

A rotational resistance force generating mechanism that generates a rotational resistance force on a rotating body that rotates about a shaft portion,
A cylindrical portion provided in the rotating body and having a through hole into which the shaft portion is inserted;
A plurality of convex portions provided at predetermined intervals in the circumferential direction on the end surface on the insertion direction side of the shaft portion of the cylindrical portion, and the position of the apex higher than the position of the tip surface of the shaft portion;
Contour is a larger member than the outer shape of the distal end surface of the shaft portion, the inner portion fixed to the distal end surface of the shaft portion, and a pressing member outer portion presses the plurality of the convex portions elastically, the A rotation resistance generating mechanism characterized by comprising:   The rotational resistance generating mechanism according to claim 1, wherein the convex portion has a tapered shape in which a cross-sectional area gradually decreases toward a tip. The rotation resistance generating mechanism according to claim 1, wherein the pressing member is a resin washer.   The rotation resistance generation mechanism according to claim 3, wherein the pressing member is screwed to a distal end surface of the shaft portion.

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