JPH0632195U - Remote control mirror - Google Patents

Abstract

(57) [Abstract] [Purpose] The base end portion of the gear shaft is integrally fixed to one of the divided housings, and the bearing hole for supporting the tip end of the gear shaft is provided in the other of the divided housings. By improving the formed electric remote control mirror,
Prevents shaft shake and smoothes gear rotation without compromising assembly work. [Structure] The gear shaft 1a ₁ is integrally formed with a housing instep 1A which is one of the two divided housings. The other housing B 1B is provided with a bearing hole 1b ₂ having a diameter significantly larger than that of the gear shaft 1a ₁ and a protrusion 1b _{3 at} the bottom of the bearing hole. A recess 1a ₂ is provided at the tip of the gear shaft 1a ₁ to form a thin-walled tube, and the protrusion 1b ₃ is press-fitted therein. As a result, the gear shaft is supported without play.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a remote control mirror of a rearview mirror such as an automobile door mirror having a structure capable of arbitrarily adjusting a support angle of a mirror body with respect to a mirror housing.

[0002]

[Prior art]

3 to 5 show known examples of this type of electric remote control mirror. FIG. 3 shows the drive unit with the mirror body removed, and is a front view of the drive unit housing 1 with one part cut away. FIG. 4 is a schematic H-H sectional view with the mirror body attached. Two orthogonal axes X-X 'and Y-Y' are set, a ball joint 2 is provided at an intersection O thereof, and the mirror body 3 is tiltably supported by the ball joint 2 as shown in FIG. 4 is the mirror body. As shown in FIG. 3, the advance / retreat rods 5 are provided on the XX ′ axis and the YY ′ axis, respectively. The advancing / retreating rod 5 is connected to the mirror body 3 by providing a ball joint 6 at its tip as shown in FIG. As shown in FIG. 3, two motors 7 are installed in the drive unit housing 1 and rotate the advancing / retreating rod 5 via reduction gear mechanisms 8. The advancing / retreating rod 5 is a member with a screw, which is rotated by the final stage reduction gear 8a of the reduction gear mechanism 8 and is moved forward and backward as indicated by a reciprocating arrow a in FIG. The reciprocating rectilinear movement (arrow a) of the advancing / retreating rod 5 causes the ball member of the ball joint 6 to linearly move forward and backward, thereby tilting the mirror body 3 as indicated by a reciprocating arc arrow b. It is necessary to elastically support the advancing / retreating rod 5 so that the advancing / retreating rod 5 does not generate bending stress or is not twisted and hinders smooth operation due to the difference between the linear movement and the circular arc movement. As a technique for elastically supporting the advancing / retreating rod so that an unreasonable force is not applied, an electric remote control mirror (Actual Kaihei 1-82952) devised by the present inventor is known. FIG. 5 is a cross-sectional view of an essential part of the electric remote control mirror according to the above-mentioned known technology. The drive unit housing 1 is divided into a housing A 1A and a housing B 1B, which are assembled by accommodating internal mechanisms and combined with each other. Is fixed to. The motor 7 rotates the final stage original gear 8d via the worm original gear 8b and the worm receiving gear 8c. The final stage original gear 8d meshes with the final stage receiving gear 8a to rotate it. 8a ₁ is a receiving gear boss, which is rotatably supported by the drive unit housing 1. Reference numeral 9 in the drawing denotes a cylindrical central shaft, which is connected to the final stage receiving gear 8a by a flexible thin plate 10. The central shaft 9 is provided with a vertical slit 9a, the tip of which is formed as a male screw piece 9b. The male screw piece 9b is screwed into a female screw hole 5a provided in the inner circumference of the cylindrical advancing / retreating rod 5 and is pressed by a spring 9c. A recess 10a is provided in the central portion of the thin plate 10 and is fitted in a protrusion 1a provided on the drive unit housing 1. Reference numeral 11 is a waterproof O-ring. The worm receiving gear 8c and the final stage main gear 8d are rotatably supported between the housing A 1A and the housing B 1B of the drive unit housing 1. An enlarged sectional view of this portion is shown in FIG. The gear shaft 1a ₁ is integrally formed with the housing shell 1A. The gear shaft 1a ₁ is formed in a cantilever shape by itself, and its tip end is fitted and supported in the bearing hole 1b ₁ of the housing B 1B.

[0003]

[Problems to be solved by the device]

As can be easily understood from FIG. 5, when the driving members are housed and combined in the housing A 1A and the housing B 1B forming the driving unit housing 1, the gear shaft shown in FIG. The fitting portion between 1a ₁ and the bearing hole 1b ₁ cannot be visually inspected, and the hand cannot be guided by hand. Therefore, if the fitting state is tight, the assembling work becomes difficult. For this reason, conventionally, the fitting of the portion has generally been loosened. Since the above-mentioned fitting is a clearance fit, the shaft is shaken, the rotation of the gear is not smooth, and the load of the motor fluctuates, which is one of the causes of malfunction. The present application has been made in view of the above circumstances, and an electric remote controller capable of reliably supporting the gear shaft to prevent shaft deviation and smoothing the rotation of the gear without complicating the assembly work. The purpose is to provide a remote control mirror.

[0004]

[Means for Solving the Problems]

The basic principle of the present invention created to achieve the above object will be briefly described with reference to FIG. 2 corresponding to the embodiment. A recess 1a ₂ is formed at the tip (lower end in the figure) of the gear shaft 1a ₁ . It is formed into a tubular shape. When carrying out the present invention, all the gear shafts 1a ₁ may be tubular shafts. At least the vicinity of the tip is formed into a tubular shape. On the other hand, the bearing hole 1b ₂ has a much larger diameter than the gear shaft 1a ₁ . In the present invention, to make the bearing hole significantly larger means that when it is fitted as a normal bearing hole to a gear shaft, the play is too large to be practically used. The outer diameter of the projection 1b ₃ provided with projections 1b ₃ near the center of the bottom portion of the bearing hole 1b _2, set larger appropriately than the inner diameter of the recess 1a ₂ of the tubular, the projections 1b _3, Pressing into the recess 1a ₂ eliminates play. According to the present invention as a configuration based on the above principle, the mirror body is supported in a tiltable manner in the housing of the mirror drive unit, and one end of each of the plurality of threaded rods provided on the drive unit is attached to the mirror body. An electric remote control mirror having a structure in which the threaded advancing / retreating rods can be screw-fed via a screw member that is connected via a ball joint and is screwed into each of the advancing / retreating rods. A screw member to be screwed is driven to rotate by a motor via a gear, and the housing is divided into a plurality of parts, which are fixed to each other in combination, and one of the divided housings has a base end portion of a gear shaft. Are integrally fixed, and a bearing hole for supporting the tip of the gear shaft is formed in the other of the divided housings. It is significantly larger than the outer diameter of the tip of the axle, and at least the tip of the gear shaft is hollow so as to form a thin tubular shape. It is characterized in that there is provided a protrusion having an outer diameter dimension for tightly fitting and having a thin tip, and the protrusion is press-fitted into a tubular hollow portion at the tip of the gear shaft.

[0005]

According to the above configuration, the tip of the gear shaft is guided by the protrusion on the bottom of the bearing hole to be press-fitted. Therefore, the concentricity between the gear shaft and the bearing hole does not require high accuracy. Moreover, since the projection is press-fitted into the gear shaft recess, shaft deviation does not occur. Therefore, it is possible to smoothly rotate the gear.

[0006]

【Example】

FIG. 1 is an enlarged sectional view of an essential part showing one embodiment of the present invention, which is a view corresponding to FIG. 6 in the conventional example. FIG. 2 is an assembly process diagram in which the essential parts of the components shown in FIG. 1 are extracted and drawn. Next, the configuration will be described in detail with reference to FIGS. 1 and 2. The gear shaft 1a ₁ is integrally formed with the housing instep 1A and has a bearing hole 1b.
₂ is provided in housing Otsu 1B. The inner diameter of the bearing hole 1b ₂ is set so much larger than the outer diameter of the gear shaft 1a _1. A recess 1a ₂ is provided at the tip (lower end in the figure) of the gear shaft 1a _{1, and} the tip has a thin-walled tubular shape. In the present invention, "thin wall" means that the wall thickness is such that it can be deformed without cracking. As shown in FIG. 2 (A), when the gear shaft 1a ₁ is pushed in the direction of arrow P, the recess 1a ₂ at the tip of the gear shaft is guided to the tapered portion of the tip (upper end in the figure) of the protrusion 1b ₃ and The protrusion 1b ₃ is press-fitted and supported. As can be easily understood from the above-mentioned structural function, the gear shaft 1a ₁ and the bearing hole 1b ₂ in this embodiment do not require high-precision concentricity. That is, even if there is some eccentricity, the thin tubular portion of the gear shaft deforms and adapts. For this reason, the assembling work is easy, does not require a high degree of skill, does not spend a lot of time and labor, and there is no fear of a mounting failure. Moreover gear shaft 1a ₁ can be prevented Gatagamu rather is reliably supported tip, the shaft wobble.

[0007]

[Effect of device]

 As described above with reference to the embodiments, when the electric remote control mirror according to the present invention is applied, the gear shaft is securely supported to prevent shaft shake without making the assembly work difficult, and the gear It has the practical effect of smoothing the rotation.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of an electric remote control mirror according to the present invention.

FIG. 2 is an assembly process diagram for explaining an assembly method, an operation, and an effect in the above embodiment.

FIG. 3 is a partially cutaway front view showing a known example of an electric remote control mirror drive unit.

FIG. 4 is a schematic partial cross-sectional view of the entire electric remote control mirror according to the known example.

FIG. 5 is a cross-sectional view of an advancing / retreating rod and a drive mechanism thereof for explaining the problem in the known example.

FIG. 6 is an explanatory view of the vicinity of a tip end portion of a gear shaft supporting the final stage receiving gear in the above-mentioned known example.

[Explanation of symbols]

1 ... driving unit housing, 1a ... protrusion, 1a ₁ ... gear shaft,
1a ₂ ... recessed portion, 1b ₁ ... bearing hole, 1b ₂ ... loosely fitted bearing hole, 1b ₃ ... protrusion, 1A ... housing former, 1B ...
Housing B, 2 ... Ball joint, 3 ... Mirror body, 4 ... Mirror body, 5 ... Advance rod, 5a ... Female screw hole, 6 ... Ball joint,
7 ... Motor, 8 ... Reduction gear mechanism, 8a ... Final stage receiving gear,
9 ... central axis, 9a ... slit, 9b ... male screw piece, 9c ... spring, 10 ... flexible thin plate, 10a ... dent, 11 ... O
ring.

Claims (1)

[Scope of utility model registration request] 1. A mirror body is tiltably supported in a housing of a mirror drive section, and one end of a plurality of threaded advancing and retracting rods provided in the drive section is connected to the mirror body via a ball joint. However, it is an electric remote control mirror having a structure in which the threaded advancing / retreating rod can be screw-fed through a screw member screwed to each of the advancing / retreating rods, wherein the screw member screwed to the advancing / retreating rod is a motor The housing is divided into a plurality of parts, which are fixed to each other in combination, and the base end of the gear shaft is integrally fixed to one of the divided housings. In the case where a bearing hole for supporting the tip of the gear shaft is formed in the other of the divided housings, the inner diameter of the bearing hole is larger than the outer diameter of the tip of the gear shaft. The gear shaft is formed in a hollow shape so that at least the tip end portion thereof has a thin tubular shape, and the bottom surface of the bearing hole has an outer diameter dimension that is closely fitted to the tubular tip end portion. An electric remote control mirror characterized in that a projection having a thin tip is provided, and the projection is press-fitted into a tubular hollow portion at the tip of the gear shaft.