JPH049229Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the structure of a back mirror, and more particularly to the structure of a pivot portion that holds a mirror holder so as to be angularly displaceable.

[Prior Art] In a conventional back mirror of this type, a spherical pivot is provided at the tip of a support shaft projected from the front surface of the support, a seat into which the pivot fits is provided on the rear surface of the mirror holder, and the seat has the above-mentioned shape. For example, in the 1980s, the pivot was fitted and held.
It is known from Publication No. 34504. In this conventional example, the seat that fits and holds the pivot is made of synthetic resin, and the pivot is forcefully fitted onto this seat using the elastic force of the resin to obtain the required fitting torque. It was warm.

However, in recent years, back mirrors have tended to become larger and heavier, so when such conventional back mirrors are used under sunlight in the summer or under high temperatures such as radiant heat, the ball joint described above may be damaged. When thermal deformation occurs, the fitting torque decreases, resulting in looseness. In addition, such ball joints may not always have accurate dimensions depending on the molding conditions, etc.
There was a problem in that the contact between the pivot and the seat tended to be uneven during assembly. As a result, the conventional type had the disadvantage that vibrations were likely to occur in the rear view mirror when the vehicle was running.

As a recent attempt to improve these drawbacks, as shown in Utility Model Publication No. 60-37857, a coil spring is used, and the fitting torque of the ball joint is maintained constant by the spring pressure. is proposed. In other words, this proposed example is the fifth
As shown in Figures A and 5B, while pushing the hemispherical wall 22 provided on the rear surface of the mirror holder 21 into the hemispherical seat 23 provided on the front surface of the support body 20, another hemispherical wall portion 22 is inserted into the inner hemispherical seat 24. Press the hemisphere part 25,
Next, the holding member 26 is fitted into the annular recess 27 of the hemispherical seat 24 from the front of the holder 21, and then the coil spring 28 is inserted into the holding member 26, and the screw 2 is inserted.
9 is screwed into the screw hole 30, and the hemispherical portion 25 is pressed into contact with the hemispherical seat 24 by spring pressure. As mentioned above, this conventional example has a large number of parts, and after assembling the ball joint, the mirror 31 is attached to the front of the holder.
This has the drawback of not being able to perform efficient assembly work and increasing assembly costs.

[Purpose of the invention] The present invention has a small number of parts, eliminates the need for the assembly process described above, and can maintain a predetermined fitting torque using spring pressure even if there is thermal deformation of the spherical seat or variations in dimensions. The purpose of this paper is to propose a structure of a pivot part in a back mirror that can obtain the following.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a support shaft having a spherical pivot protruding from the center of a spherical seat provided on the front surface of the support member, while a mirror A socket into which the spherical pivot can be fitted is provided on the rear surface of the holder, and an elastic member is provided in the pivot to cause the pivot to expand in diameter, and then the pivot is press-fitted into the socket, and the inner surface of the socket is The present invention proposes a structure of a pivot portion in a rearview mirror, characterized in that it is configured to apply a required fitting torque between the outer surface of the pivot and the outer surface of the socket, and the inner surface of the spherical seat.

[Example] Hereinafter, the present invention will be specifically described based on the accompanying drawings. 1 and 2 show an embodiment in which the present invention is applied to an electric remote control mirror. In the accompanying drawings, reference numeral 1 denotes a mirror, 2 a mirror holder that holds the mirror 1, and 3 a mirror body that accommodates a mirror unit consisting of the mirror 1 and the mirror holder 2, and an actuator to be described later. Reference numeral 4 denotes a support body for the mirror holder, which in this embodiment is composed of an actuator unit incorporating a small electric motor for adjusting the reflection angle of the mirror 1. Further, a support shaft 5 is provided protruding from the front surface of the support body 3, and a spherical pivot 6 is provided at the tip of the support shaft. This pivot 6 is press-fitted into a spherical socket 7 formed on the rear surface of the mirror holder 2.

The spherical pivot 6 is made of synthetic resin and is integrally formed with the support 4. As shown in an enlarged view in FIG. is configured to have a predetermined spreading tendency. Further, an elastic member 8 is provided inside the pivot to give the pivot a tendency to expand in diameter.

In this embodiment, a notched ring-shaped spring made of steel wire is used. This notched ring-shaped elastic member 8 is held in a locking groove 6b provided on the inner circumferential surface of the pivot, thereby giving the pivot 6 a tendency to expand in diameter as described above.

Reference numeral 9 denotes a spherical seat having the pivot 6 in the center, and this spherical seat projects from the front surface of the support 4, so that the smooth outer surface of the socket 7 slides against the inner surface of the spherical seat 9 during use. It is configured to touch.

Reference numeral 10 denotes an operating rod that protrudes from the front surface of the support 4 and is used to adjust the vertical and horizontal angles of the mirror 1 about the pivot 6.
A pivot 12 is provided at the tip of each operating rod. These pivots are respectively fitted into sockets 13 provided on the rear surface of the mirror holder.

By the way, as mentioned above, in the present invention, in order to apply the required fitting torque between the spherical pivot 6 and the spherical socket 7, a substantially ring-shaped elastic member 8 is compressed inside the pivot 6. ing. That is, as shown in FIG. 4, this ring-shaped elastic member 8 tends to expand the spherical shell forming the outer periphery of the spherical pivot 6, presses the pivot 6 and the spherical socket 7 together, and achieves the desired fit. I am trying to obtain the total torque. Further, the outer circumferential surface of the socket 7 is pressed against and comes into contact with the concave surface of the spherical seat 9, thereby suppressing expansion of the socket 7 caused by thermal deformation or the like, and generating resistance over a wide area.

In the above embodiment, a back mirror with a built-in actuator unit for remotely controlling the angle of the mirror was shown, but the present invention is not limited to this type of back mirror; Instead of the actuator unit described above, a simple base plate or mirror body itself may be used as the support. In addition, the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the present invention.

[Effects of the invention] As described above, in the present invention, a support shaft having a spherical pivot is provided protruding from the center of the spherical seat provided on the front surface of the support member, and the spherical pivot is fitted into the rear surface of the mirror holder. The pivot is press-fitted into the socket, and the inner surface of the socket and the outer surface of the pivot, and the outer surface of the socket and the spherical seat are formed. Since the structure is such that the sockets are pressed against each other, the expansion of the socket under high temperatures can be suppressed by the spherical seat.
Further, even if there is dimensional variation during molding, resistance can be generated over a wide area in the pivot, thereby preventing a reduction in fitting torque. In addition, as mentioned above, the present invention has fewer parts than the conventional type, and the work of press-fitting the pivot into the socket can be done by force-fitting it in one-touch, which saves time and effort during complicated assembly. It has excellent practical merits, such as being able to omit it and improving production efficiency.

[Brief explanation of drawings]

Figure 1 is a front view of an electric remote control mirror to which the present invention is applied, Figure 2 is a side view of the same mirror with a portion cut away, Figure 3 is an enlarged view of the main parts, and Figure 4 is A side view of the actuator unit and the pivot portion, and FIGS. 5A and 5B are explanatory diagrams showing the assembled and disassembled states of the main parts of the conventional type. DESCRIPTION OF SYMBOLS 1... Mirror, 2... Mirror holder, 3... Mirror body, 4... Support body, 5... Support shaft, 6... Spherical pivot, 7... Socket, 8... Elastic member, 9
...Spherical seat.

Claims (1)

[Claims for Utility Model Registration] 1. A support shaft having a spherical pivot is provided protruding from the center of a spherical seat provided on the front surface of the support member, and a socket into which the spherical pivot can be fitted is provided on the rear surface of the mirror holder. An elastic member is provided in the pivot, and an elastic member that tends to expand the diameter of the pivot is compressed in the pivot, and the pivot is press-fitted into the socket, thereby forming a gap between the inner surface of the socket and the outer surface of the pivot, and between the outer surface of the socket and the inner surface of the spherical seat. 1. A structure of a pivot portion in a rearview mirror, characterized in that it is configured to apply a required fitting torque to each of the pivot portions. 2. The structure of a pivot portion in a rearview mirror according to claim 1 of the utility model registration, wherein the spherical pivot has an axial groove on its circumferential surface. 3. The structure of the pivot portion of the rear view mirror as claimed in claim 1, wherein the elastic member in the spherical pivot is a notched ring-shaped spring.