JPH031648Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a telescopic drive device that converts the rotational force of an electric motor to reciprocate a driven body used in daily life in the front and back, left and right directions, etc. be.

[Conventional technology]

Hereinafter, a telescopic drive device for opening and closing a sunshade screen provided on the rear windshield of an automobile will be described as an example.

A sunshade device that is attached to a car and can be raised and lowered automatically has not been known so far. Conventionally, in vehicles, especially passenger cars, depending on the direction of travel, direct sunlight can enter the interior of the vehicle, and to prevent this,
Direct sunlight is prevented by hanging towels or attaching sunshade film to areas exposed to direct sunlight.

In addition, the above-mentioned modifications to the windshield are not allowed for safe driving. Regarding the sides,
A sunshade can be provided by opening and closing the window glass.For the rear glass, it is common to have a manually operated curtain that moves left and right, but the opening and closing of this curtain must be done by the person in the rear seat. It is inconvenient and does not match the design of the automobile because the driver cannot freely operate the device. Therefore, with the recent trend toward luxury cars, automated rear window sunshade devices are required for luxury cars.Furthermore, this device can be installed by even the customer, has a sophisticated structure in terms of design, and is suitable for drivers. It is desired that the device be capable of remote control operation.

By the way, in order to obtain a sunshade device that meets the above-mentioned demands, the space between the rear seat of a car and the rear window behind it is narrow, and equipment and parts such as air purifiers installed in this space must be used. It is necessary to have a size, shape, and structure that avoids such problems, and for this purpose, it is necessary to obtain a small telescopic drive device that can be installed externally in a restricted space and can be operated by remote control. .

As such a telescopic drive device, as a mechanism to obtain a feeding force without slippage, the rotational force is transferred back and forth by meshing an easy cord with a spur gear or a helical gear to which the rotational force is transmitted from an electric motor that rotates forward and backward. It is conceivable to use a general telescopic drive device that converts the

[The problem that the idea aims to solve]

However, in the conventional telescopic drive device as described above, the teeth of the easy cord are sent by the number of teeth (17 or more) per rotation of the gear, so the deceleration from the electric motor is large, and the easy cord is sent in opposition to the gear. Coupled with the need for restraining rollers, the overall size of the drive device becomes large, and it cannot be installed in the narrow space between the passenger car and the rear windshield as described above.
Another problem was that when the teeth of the easy cord were fed in the longitudinal (axial) direction of the cord, the engagement ratio between the teeth was small (1.0 for spur gears), making it impossible to generate a large force.

The purpose of the present invention is to solve the above-mentioned problems and provide a telescopic drive device that can reduce the gear ratio, be compact and thin, and increase the meshing ratio to generate a large force. There is.

[Means to solve the problem]

In the telescopic drive device according to the present invention, a drive worm to which rotational force is transmitted from an electric motor is directly engaged with a rack cord connected to a driven body, and the rack cord has an end opposite to the end connected to the driven body.
It is characterized by being flexible, being bent back by 180 degrees and stored in a storage member, and slidably supported on the inner surface of this member.

[Effect]

The telescopic drive device of the present invention directly engages the easy cord with the drive worm and has the flexibility to bend the easy cord back by 180 degrees, so that the rotational force of the electric motor can be transferred to a small reduction mechanism such as a reduction gear mechanism that meshes many spur gears. It is only necessary to transmit the transmission to the final stage drive worm at a small speed change through the speed reduction mechanism of By making it possible to increase the engagement ratio, a large driving force can be obtained with a small module, and a sufficient stretching force can be obtained even when the driven body is heavy.

〔Example〕

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

In FIG. 5, reference numeral 1 is the rear windshield of a passenger car, and a speaker 3 and an air purifier 4 are installed between the rear windshield 1 of the passenger car and the rear seat 2 with a pillow 2b, and a sunshade is provided to avoid these. A device 5 is provided. As shown in FIGS. 5 and 6, the sunshade device 5 has a split groove 6a formed along the longitudinal direction of the column 6 on the front surface of the column 6, which has a substantially box-shaped cross section along the inner surface of the rear glass 1. The lower end of the column 6 is fixed to a telescopic drive device to be described later. This drive device 7 is fixed to a portion between the rear glass 1 and the rear seat 2, and is wound around a lower shaft 8 that is rotatably supported by a support member (not shown) fixed to this portion. The upper shaft 10 is fixed to the sunshade screen 9 that is attached to the sunshade screen 9, and the hook portion 10a of the upper shaft 10
It is connected by a hook or the like to a connecting part 11a provided in the. The connecting portion 11a is inserted into a groove 6a provided on the front surface of the column 6 so as to be movable in the vertical direction, and projects slightly in front of the column 6. In addition, in this embodiment, since the air cleaner 4 is provided at the center in the width direction of the vehicle, in order to avoid this and to maintain rear visibility, the screen 9, upper and lower axles 10, 11, etc. is divided into two in the vehicle width direction. In FIG. 6, reference numeral 38 is a connecting shaft, and 39 is a telescopic driven portion.

As shown in detail in FIGS. 1 to 4, the telescopic drive device 7 is provided with an electric motor 13 that rotates in forward and reverse directions at the upper part of one side of the case 12, and the upper part of the electric motor 13 is removably fixed to the case 12. It is covered with a cover 14. A bottom cover 15 is detachably fixed to the lower part of the case 12, and a speed reduction mechanism 16 is housed inside the case 12 and the bottom cover 15.
In the deceleration mechanism 16, a spur gear 17 fitted to the shaft 13a of the electric motor 13 is meshed with a large diameter portion of a first gear 19 rotatably fitted to the first shaft 18. The small diameter portion of the second gear 21 is engaged with the large diameter portion of the second gear 21 rotatably fitted on the second shaft 20, and the small diameter portion of the second gear 21 is engaged with the first gear of the first shaft 18. The small diameter portion of the third gear 22 is engaged with the large diameter portion of the third gear 22 fitted below the second gear 21 of the second shaft 20 . The fourth gear 23 is meshed with the large diameter portion of the gear 23.
a fifth gear 2 whose small diameter portion is fitted into the third shaft 24;
5, and the fifth gear 25 is engaged with the sixth gear, the drive gear 26. Note that the first to fifth gears 19, 21, 22, 23, 2
5 and the drive gear 26 are each formed of a spur gear.

The drive gear 26 is connected to a drive shaft 2 provided in the other side cylindrical portion 28 formed in the case 12 and the bottom cover 15.
9, the drive shaft 29 has a lower end supported by a slide receiver 30a and a cylindrical tamper 30b provided in the cylindrical portion 28, and an upper end supported by a thrust screw 30c provided in the case 12. Supported. A dog clutch 31 is engaged on the drive gear 26, and a clutch spring 33 is interposed between the clutch 31 and a drive worm 32 disposed above the clutch 31.

The clutch 31 is fitted onto the drive shaft 29 so as to be axially slidable and unrotatable, and the drive worm 32 is fitted onto the drive shaft 29 so as to be axially movable and unrotatable, and is diagonally attached to the rack cord 11. It is meshed with the provided teeth 11b. Easy code 1
1 is made of a flexible material and is bent back by 180° at the lower end of the cylindrical portion 28 with the teeth 11b on the inner peripheral side;
The outer circumferential surface on the side opposite to the teeth 11b is slidably supported on the inner surface of the storage member constituted by the cylindrical portion 28. The column 6 is fixed to the upper end of the cylindrical portion 28, and a partition 6b is provided in the column 6 in the vertical direction.Although not shown, the rack cord 11 is bent back by 180 degrees at the upper end of the column 6. Easy code 11
The outer peripheral surface of the support column 6 is also slidably supported on the inner surface of the support column 6.

The case 12, the cover 13, the bottom cover 15, and the support column 16 are each made of a synthetic resin molded product or a combination thereof, and a cap 34 is attached to the upper end of the support column 6 as shown in FIG. There is. Further, in FIG. 1, reference numeral 35 is a C-shaped retaining ring, 36 is a spring holder, and in FIG. 2, reference numeral 37 is a C-shaped retaining ring.
a and 37b are spacers, and 38 is a connecting shaft.

In the telescopic drive device configured as described above, when the electric motor 13 is driven by a remote control method by the driver of a car, the gears are moved from the spur gear 13 to the first to fifth gears 19, 21, 22, 23, and 25 in this order. The rotational force is sequentially transmitted, and the drive gear 26 is rotated at an appropriately small reduction ratio. Since the drive gear 26 and the clutch 31 are normally engaged, rotational force is transmitted from the drive gear 26 to the drive worm 32 via the clutch 31 and the drive shaft 29. Since the teeth 11b of the easy cord 11 are directly engaged with the diagonal teeth of the drive worm 32, the rotation of the drive worm 32 is controlled.
The rack cord 11 is fed in the longitudinal (up and down) direction by the rotational frictional force. By rotating the electric motor 13 in the forward and reverse directions, the direction in which the rack cord 11 is fed is reversed.

Therefore, as the rack cord 11 reciprocates in the longitudinal direction, the screen 9, which is a driven body connected to the connecting portion 11a via the upper shaft 10, is paid out from the lower shaft 8, and the sunshade device 5 is used. In addition, the screen 9 is wound up on the lower shaft 8 and becomes unused. In the sunshade device 5 shown in FIGS. 5 and 6, a telescopic drive device 7 is provided at the lower end of the left column 6, and the lower end of the right column 6 is connected to the lower end of the right column 6 by an appropriate mechanism (not shown). The screen 9 of the right-hand sunshade device 5 is unwound to the lower shaft 8 and rolled up by interlocking with the telescopic follower 39 provided on the right side. The sunshade device 5 is provided with a telescopic drive device 7 similar to the one on the left.

Furthermore, since the load acting on the rack cord 11 at the unwinding and winding ends of the screen 9 relative to the lower shaft 8 increases, the negative force of the drive worm 32 that meshes with it also increases, causing the clutch 31 to engage the drive gear 26.
By detaching from the worm, the rotational force from the electric motor 13 side to the drive worm 32 is no longer transmitted. moreover,
In order to smoothly wind up the screen 9 on the lower shaft 8, an appropriate spring such as a spiral spring may be provided to bias the lower shaft 8 in the winding direction of the screen 9.

In this embodiment, the rack cord 11 sent vertically by the drive worm 32 is moved to the cylindrical portion 28.
The lower end of the cord 11 is bent back by 180 degrees and inserted into the column 6, and the cord 11, which is moved upward and downward into the column 6, is inserted into the tooth 11.
b is stored facing the inner circumferential side, and since the outer circumferential surface of the cord 11 is slidably supported on the inner surface of the cylindrical part 28 and the support column 6, which are the storage members, the storage member can be made of the same material. Not only can the storage member be made smaller, but also the cord 11 can slide more easily.Compared to the conventional method of processing the ends of long easy cords using a dripping method, the cords can be stored in a narrow space with a good appearance. In addition, the cord can be bent in the same direction as the bending direction of the support, and there is no need for a cord guide, and the necessary return guide can be built in, making it easy to attach to the storage member and support. Since the reciprocating part of the cord is built in, the sliding property is constant and a forced feeding mechanism is not required, making it suitable for the above-mentioned sunshade device.

The present invention is not limited to the above-mentioned sunshade devices, but can be widely used in flag raising and lowering devices attached to automobiles, opening and closing devices for household video projector screens, electric antenna devices, automobile power window devices, sunroof devices, etc. I can do it. In addition, since the teeth of the worm are provided diagonally with respect to the axial direction, it is preferable that the teeth of the easy cord of the present invention be made oblique to correspond to this, but if there is no problem even if the easy cord ascends obliquely, For example, an ordinary easy-to-manufacture easy-to-manufacture easy-to-manufacture easy-to-manufacture cord with teeth orthogonal to the longitudinal direction can be used.

[Effect of idea]

As explained above, according to the present invention, since the easy cord is directly engaged with the drive worm to which the rotational force is transmitted from the electric motor, the rotational force of the electric motor is
By transmitting the signal to the smallest stage drive worm at a small reduction ratio through a small reduction mechanism such as one made of meshed spur gears, it is possible to provide a small and thin telescopic drive device including the reduction mechanism. In addition, according to the present invention, the drive worm can move the cord in the longitudinal direction while sliding and frictioning the teeth of the easy cord, increasing the meshing ratio, thereby making it possible to obtain a large driving force with a small module. This has the effect that sufficient stretching force can be obtained even if the driving body is heavy.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional side view of the main parts of a telescopic drive device according to an embodiment of the present invention, FIG. 2 is a partially sectional front view of the same main parts, and FIG.
4 is a sectional view taken along the - line in FIG. 1, FIG. 5 is a schematic side sectional view of the rear part of an automobile having a sunshade device using a telescopic drive device according to an embodiment of the present invention, and FIG. FIG. 6 is a partially cutaway perspective view of the sunshade device of FIG. 5, looking rearward from the seat; 1... Rear glass, 2... Rear seat, 2b...
Pillow, 3...Speaker, 4...Air purifier, 5...
Sunshade device, 6... Support, 6a... Division groove, 6b
...Partition, 7...Telescopic drive device, 8...Lower shaft,
9...Screen (driven body), 10...Upper shaft,
10a...Hook part, 11...Rack cord, 11
a...Connection part, 11b...Teeth, 12...Case,
13...Electric motor, 13a...Shaft, 14...Cover, 15...Bottom cover, 16...Deceleration mechanism, 17...
Spur gear, 18...first shaft, 19...first gear, 20...second shaft, 21...second gear, 2
2...Third gear, 23...Fourth gear, 24...
... Third shaft, 25 ... Fifth gear, 26 ... Drive gear, 27 ... Case, 28 ... Cylindrical part (storage member), 29 ... Drive shaft, 30a ... Thrust receiver,
30b...Metal, 30c...Thrust screw, 3
1...Matching clutch, 32...Driving worm, 3
3...Clutch spring, 34...Cap, 35...
...Retaining ring, 36... Spring holder, 37a, 37b...
Spacer, 38... Connection shaft, 39... Telescopic driven part.

Claims (1)

[Claims for Utility Model Registration] A rack cord connected to a driven body is directly engaged with a drive worm to which rotational force is transmitted from an electric motor, and the rack cord has an end portion opposite to the end connected to the driven body at a 180° angle. A telescopic drive device characterized in that it has flexibility and is bent back and stored in a storage member, and is slidably supported on the inner surface of the storage member.