JP2805576B2 - Actuators such as door locks - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an actuator, and more particularly to a lock lever of a door lock device which is displaced between a lock position and an unlock position, and a retractable headlight which is displaced between a lighting position and a storage position. Thus, the present invention relates to an actuator that moves a member displaced to two symmetrical positions by power.

[0002]

2. Description of the Related Art FIGS. 12 and 13 show a conventionally known representative actuator used for a lock lever of a door lock device, wherein A is a driving gear rotated by a motor, and B is a driving gear.
Is a large-diameter intermediate gear that meshes with the drive gear A, C is a small-diameter intermediate gear integrated with the large-diameter intermediate gear B, and D is an output lever that meshes with the small-diameter intermediate gear C. These gear groups are always meshed with each other. E is an output shaft. In the above, when the drive gear A is rotated forward a by the motor, the intermediate gears B and C rotate b, and the output lever D swings in the direction c while compressing the neutral return spring G from the neutral position in FIG.
The engagement pin I of the intermediate lever H engages with the arc hole J of the output lever D via lost motion as shown in FIG. 13 and when the output lever D swings in the direction c, the left end of the arc hole J The intermediate lever H is rotated clockwise by the engagement between the intermediate lever H and the engagement pin I. The intermediate lever H and the output shaft E are fixed, and the lock lever K is fixed to the output shaft E, so that when the intermediate lever H rotates, the lock lever K also rotates. When the output lever D swings and comes into contact with the right rubber stopper L, the motor is stopped and the output lever D is returned to the neutral position by the elastic force of the compressed spring G.

[0003]

When the output lever D swings to the left or right by the forward or reverse rotation of the motor, the known actuator has a structure in which the spring G is compressed and swings. It becomes a load on the motor, causing a large loss in overall output.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an actuator in which a reduction in output is greatly reduced by using a unique device.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention comprises a forward / reverse rotation motor 4, a drive gear 6 fixed at a position fixed to a drive shaft 5 of the motor 4, and a plate meshed with the drive gear 6. An arc-shaped long hole 13 having the drive shaft 5 as a center,
When both ends of the rotating shaft 15 are inserted through the gears 14 and when the gears are rotated forward by the reaction force of the meshing of the gears, they move toward one end of the arc-shaped long holes 13 and 14 and when they rotate reversely, they move toward the other end respectively. The gear body 10 is pivotally supported on the opposite side of the drive shaft 5 as viewed from the rotary shaft 15 and swings to one and the other symmetrical position, so that the rotary shaft 15 is substantially at both ends of the arc-shaped long holes 13 and 14. An output lever 7 having an arcuate gear portion 17 that meshes with the moving gear body 10 only at the intermediate position. At least one of the arc-shaped long holes 13 and 14 has An actuator such as a door lock or the like having a semicircular engaging step portion 20 which elastically protrudes from the outer edge 16 toward the inside of the elongated hole and forms a semicircular engagement step 20 with which the rotary shaft 15 elastically engages is formed at a central portion. Things.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, 1 is a base plate made of a substantially flat metal plate, and 2 is a cover plate made of a metal plate fixed to the base plate 1 with bolts or the like. It is bent. Space 3 between plates 1 and 2
Is formed. Reference numeral 4 denotes a motor fixed to the outside of the cover plate 2, and a drive shaft 5 of the motor 4 is
And the small diameter drive gear 6 is fixed to the projecting portion.

Reference numeral 7 denotes a fan-shaped output lever located at a distance from the drive gear 6, and an output shaft 8 is fixed to a base of the output lever 8 so as to rotate integrally therewith.
Is rotatably supported at a lower position. One end of the output shaft 8 penetrates through the cover plate 2 and protrudes outward, and a rotation operation member 9 is fixed to the protruding end of the output shaft 8. The rotation operating member 9 may be one that moves between two positions, for example, a lock lever of a door lock device that is displaced between a lock position and an unlock position, and a retractable headlight that is displaced between a lighting position and a storage position. Is applicable.

A moving gear body 10 is provided between the output lever 7 and the driving gear 6 provided at a predetermined interval. The moving gear body 10 includes a large-diameter intermediate gear 11 that always meshes with the driving gear 6 and a small-diameter intermediate gear 12 that rotates integrally with the intermediate gear 11. It is attached to a moving rotary shaft 15 fixed to arc-shaped long holes 13 and 14 centered on the axis of the gear 6.

The arc-shaped slots 13 and 14 have a somewhat large width so that the moving rotary shaft 15 can move smoothly. However, the moving rotary shaft 15 has an outer edge 16 (FIG. 3). ,
4), the intermediate gear 11 and the driving gear 6
, So that the rotation is transmitted.

When the large-diameter intermediate gear 11 rotates due to the rotation of the drive gear 6, the large-diameter intermediate gear 11 is slightly pushed out in a direction away from the drive gear 6 due to the meshing of the gears. The moving rotary shaft 15 of 11 is lightly pressed against the outer edge 16 of the arc-shaped long hole 14. Due to this pressing, a light frictional resistance is generated between the moving rotary shaft 15 and the outer edge 16, so that the rotating moving rotary shaft 15 acts like a wheel, and the arc-shaped long hole is formed in accordance with the rotation. 14 to the left or right. That is, when the drive gear 6 rotates in the direction a, the moving gear body 10 moves in the direction b (FIG. 1).

As described above, the moving rotation shaft 15 of the moving gear body 10 moves in the left-right direction along the arc-shaped long hole 14,
When the moving rotary shaft 15 moves to a position substantially at the center of the arc-shaped long hole 14, the small-diameter intermediate gear 12 meshes with the gear portion 17 on the outer peripheral surface of the output lever 7, and the moving rotary shaft 15 When moved to the left and right end portions, the small-diameter intermediate gear 12 is far away from the rotation locus of the gear portion 17, and the meshing relationship is lost.

At the position near the outer edge 16 on the inner surface of the cover plate 2, as shown in FIGS.
8 is installed. The pressing member 18 is preferably formed of a leaf spring, and its both ends are sandwiched between mounting portions 19 fixed to the cover plate 2 side. The pressing member 18
4, is arranged so as to partially overlap the outer edge 16 of the arc-shaped long hole 14, as shown in FIG. Therefore, when the moving gear body 10 moves left and right, the pressing member 18 is elastically pushed outward (in a direction away from the driving gear 6) by the moving rotating shaft 15.

A recess 20 is formed in the left and right intermediate portion of the pressing member 18 so that the moving rotary shaft 15 can be fitted therein. The depth of the recess 20 is determined in consideration of the strength of the motor 4, the size of the reduction ratio from the motor 4 to the output shaft 8, the elasticity of the pressing member 18, and the like. It is preferable that the diameter of the moving rotary shaft 15 is about 1/3 to 2/5. The action of the concave portion 20 is such that when the moving rotary shaft 15 of the moving gear body 10 moves from the end of the arc-shaped long hole 14 toward the center, the moving rotating shaft 15 is engaged and stopped, and the moving gear body 10 is stopped. Is held at the center position.

Reference numerals 21 and 22 denote a pair of left and right rubber stoppers fixed to the base plate 1 side, and the output lever 7 swings between the rubber stoppers 21 and 22.

FIG. 5 shows another embodiment of the pressing member 18. The moving member 24 has a concave portion 20 and a coil spring 25 for pressing the moving member 24. The moving member 24 is attached to the cover plate 2. The recess 20 is fitted into the formed sliding groove.
Face the outer edge 16.

[0016]

The construction of the present invention is as described above, and its operation will be described with reference to FIGS. In the state shown in FIG. 6, the moving rotary shaft 15 of the moving gear body 10 is located at the right end of the arc-shaped long hole 14, the output lever 7 swings to the left and abuts the left rubber stopper 22, and has a small diameter. The intermediate gear 12 and the gear portion 17 of the output lever 7 are completely separated. Therefore, in this state, even if the output lever 7 is rotated by manually rotating the rotation operating member 9 fixed to the output shaft 8 of the output lever 7, the small-diameter intermediate gear 12 does not rotate, and the motor 4 side The force is not transmitted to the clutch (clutch mechanism).

However, when the motor 4 is energized to rotate the drive gear 6 in the forward direction a in the state shown in FIG. 6, the large-diameter intermediate gear 11 of the movable gear body 10 rotates in the direction b. At this time, since the large-diameter intermediate gear 11 is rotated by the drive gear 6 whose position is fixed, the large-diameter intermediate gear 11 is slightly pushed out by the meshing action of the teeth. It is pressed against the outer edge 16 of the arc-shaped long hole 14, and this contact causes frictional resistance, and the moving rotary shaft 15 acts like a wheel to move in the arc-shaped long hole 14 in the direction c (FIG. 7). Status). With the movement of the moving rotation shaft 15 in the direction c, the moving rotation shaft 15 elastically deforms the pressing member 18, and the moving rotation shaft 15 moves the pressing member 1 at the center of the arc-shaped long hole 14.
8, the small-diameter intermediate gear 12 comes into mesh with the gear portion 17 of the output lever 7, and the small-diameter intermediate gear 12 tries to swing the output lever 7 in the direction d. On the other hand, the output lever 7 does not move because the resistance is relatively large on the side, and the moving rotary shaft 15 of the moving gear body 10 moves in the direction b as it is, and as shown in FIG. Combine.

When the moving rotary shaft 15 is engaged with the concave portion 20,
Since the movable rotary shaft 15 is pressed by the concave portion 20, it rotates at that position, whereby the output lever 7 meshing with the small-diameter intermediate gear 12 swings in the direction d, and is fixed to the output shaft 8 of the output lever 7. The rotating operation member 9 is also rotated to displace its position.

When the output lever 7 swings completely and comes into contact with the other rubber stopper 21 (FIG. 9), the output lever 7 does not rotate any further, so that the continuously rotating small-diameter intermediate gear 12 is fixed. When the output lever 7 is used as a stepping platform, the moving rotary shaft 15 escapes from the concave portion 20 and changes to the state shown in FIG. 11 through the state shown in FIG.

When the motor 4 is rotated in the reverse direction from the state shown in FIG. 11, the operation is reversed, and the state returns to the state shown in FIG.

As described above, in the present invention, the pressing member 18 for holding the movable gear body 10 at the intermediate position is used instead of the spring for returning to the neutral position which has been conventionally used.
The transmission efficiency of the force is dramatically improved, and as a result, when compared with the same motor output, the reduction ratio is about 8 times less than that of the conventional motor.
It could be reduced to 0%.

In the above description, two gears 11 and 12 are formed on the moving gear body 10, one of which meshes with the drive gear 6 and the other meshes with the output lever 7. This can be engaged with the driving gear 6 and the output lever 7.

[0023]

The present invention is directed to a forward / reverse rotation motor 4, a drive gear 6 fixed at a position fixed to a drive shaft 5 of the motor 4, and the drive shaft formed on a meshing plate with the drive gear 6. When both ends of the rotating shaft 15 are inserted through the arc-shaped long holes 13 and 14 centered on 5 and the gears are rotated forward by the reaction force of the meshing of the gears, the other ends are rotated to one end side of the arc-shaped long holes 13 and 14. A moving gear body 10 that moves and displaces to the end side, and is pivotally displaced to one and the other symmetrical position and is pivotally supported on the opposite side to the drive shaft 5 as viewed from the rotation shaft 15 and the rotation shaft 15 is An output lever 7 having an arcuate gear portion 17 which meshes with the moving gear body 10 only when the arcuate slots 13 and 14 are located at substantially intermediate positions between both ends thereof.
At least one of the long holes has an outer edge 1 of the long hole.
6, a semicircular engaging step 2 to which the rotating shaft 15 elastically engages, protruding elastically into the elongated hole.
0, the movable gear body 10 and the output lever 7 are moved and displaced right and left by moving the movable gear body 10 meshing with the drive gear 6.
The engagement and disengagement of the gears with each other eliminates the need for a spring for returning to the center as in the known example, the load on the motor is reduced, and the motor can be further reduced in size, resulting in a compact and inexpensive actuator. .

[Brief description of the drawings]

FIG. 1 is a plan view with a cover plate removed.

FIG. 2 is an overall vertical side view.

FIG. 3 is a rear view of the cover plate.

FIG. 4 is a diagram showing the relationship between an arc-shaped long hole and a pressing member.

FIG. 5 is another embodiment of the pressing member.

FIG. 6 is a relationship diagram in a standby state.

FIG. 7 is a relationship diagram when the drive gear is slightly rotated.

FIG. 8 is a diagram showing a relationship when a moving rotary shaft is engaged with a concave portion.

FIG. 9 is a relationship diagram when the output lever comes into contact with a rubber stopper.

FIG. 10 is a relationship diagram when the moving rotary shaft escapes from the concave portion.

FIG. 11 is a relationship diagram after the operation is completed.

FIG. 12 is a partial cross-sectional plan view of a known example.

FIG. 13 is a longitudinal sectional side view of a known example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Base plate, 2 ... Cover plate, 3 ... Space part, 4 ... Motor, 5 ... Rotary shaft, 6 ... Drive gear, 7 ... Output lever, 8 ... Output shaft, 9 ... Rotary operating member, 10 ... Moving gear body, 11 large intermediate gear, 12 small intermediate gear, 1
3, 14 ... arc-shaped long hole, 15 ... moving rotation axis, 16 ... outer edge,
17 ... gear part, 18 ... pressing member, 19 ... mounting part, 20 ...
Recesses, 21, 22: rubber stopper, 23: through-hole, 24
… Moving body, 25… coil spring.

Claims (3)

(57) [Claims] 1. A forward / reverse rotation motor 4, a drive gear 6 fixed at a position fixed to a drive shaft 5 of the motor 4, and a drive gear 6
When both ends of the rotary shaft 15 are inserted into the arc-shaped long holes 13 and 14 centered on the drive shaft 5 formed in the meshing plate, and the rotation is forward due to the reaction force of the meshing of the gears, the arc-shaped long hole 13 is used. , 14 are moved to the other end when they are reversely rotated, and the movable gear body 10 is displaced, and one and the other are symmetrically supported on the opposite side of the drive shaft 5 as viewed from the rotary shaft 15. And an output lever 7 having an arcuate gear portion 17 that meshes with the moving gear body 10 only when the rotating shaft 15 is oscillatingly displaced to a position and the rotary shaft 15 is at a substantially intermediate position between both ends of the arcuate slots 13 and 14. At least one of the arc-shaped long holes 13 and 14 elastically protrudes from the outer edge 16 of the long hole toward the inside of the long hole. Door lock or the like having a semicircular engagement step 20 Actuator. 2. A drive gear 6 rotated by a motor 4 and an output lever 7 connected to a rotary operation member 9 displaced to two positions are rotatably supported on a base plate, and the drive gear 6 and the output Moving gear body 1 between lever 7
0, the plate is formed with an arc-shaped long hole 14 centered on the axis of the drive gear 6, and the moving gear body 10 and the drive gear 6 always mesh with the arc-shaped long hole 14. As described above, when the moving rotary shaft 15 of the moving gear body 10 is inserted, and the moving gear body 10 rotates, the arc rotating hole 15 is formed by frictional resistance caused by the contact between the moving rotating shaft 15 and the outer edge 16 of the arc long hole 14. 14, the output lever 7 is formed with an arcuate gear portion 17 on the outer peripheral surface thereof. When the movable gear body 10 is at both ends of the arcuate slot 14, the gear portion 17 is formed. Does not mesh with the arc-shaped long hole 14
Has a concave portion 20 which meshes with the gear portion 17 when moved near the center of the circular hole, and which is elastically engaged when the moving rotary shaft 15 moves to the center of the circular arc hole 14 at a position near the circular arc hole 14. An actuator such as a door lock provided with the pressing member 18. 3. The moving rotary shaft according to claim 2,
Is an actuator such as a door lock which is pressed against the outer edge 16 of the arc-shaped long hole 14 by meshing of the teeth when the drive gear 6 rotates.