JPS6179939A - Locating and fixing device for pivotal member - Google Patents

Abstract

PURPOSE:To smoothen the turning of the pivotal member and prevent the change of pivoting resistance force of the same member by a method wherein a pair of disc-type permanent magnets, consisting of multi-polar magnetizing, is provided at the end face of the pivotal member. CONSTITUTION:The main body 1 of grille or ash tray is supported by a fixed member 4 through a pivotal shaft 2. The disc-type permanent magnet 3, magnetized by radial multi-polar magnetizing, is bonded to or embedded into the end face of the grille main body 1 to fix it. The other permanent magnet 3', magnetized so as to have same number of pole, is fixed to the inner surface of the fixed member 4 or the frame of the grille main body 1. The same effect may be obtained by arranging the permanent magnet on either one of the end face of the grille main body or the inner surface of the fixed member.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a positioning and fixing device for rotating members such as ashtray bodies for automobiles and grill bodies of ventilator grills for adjusting wind direction.

Conventional technology When fixing an ashtray for an automobile or a ventilator grill for an air conditioner by changing the opening/closing angle or the wind direction angle using a rotating mechanism, conventional techniques have been used to reduce the frictional force of the rotating shaft or the end face of the rotating member in the direction of the rotating shaft. A structure was adopted in which the operating strength was adjusted by utilizing the frictional force between the fixed member and the surface of the fixing member that was in close contact with the fixed member, or the elasticity of the spring.

Problems to be Solved by the Invention With conventional operating strength adjustment structures, even if the operating force can be operated with a moderate operating force in the initial state (=), after long-term use, the frictional resistance force may decrease or There was a drawback that the smoothness of the operation and the function of fixing the rotating member in a predetermined position with a sense of moderation were easily lost due to looseness between the members.

SUMMARY OF THE INVENTION An object of the present invention is to provide a positioning and fixing device for rotating members such as ashtrays and bench V-tag grills that rotate smoothly and with a sense of moderation.

Means for Solving the Problems The present invention solves the above problems by alternately magnetizing N and S poles around the rotation axis at the end face of the rotation member in the rotation axis direction. A disk-shaped or arc-shaped permanent magnet is disposed, and on the other hand, the surface of the fixed member facing the end surface of the rotating member also has N and S poles in contact with or in close proximity to the permanent magnet at the same pitch.
It is characterized by the arrangement of permanent magnets with magnetized poles.

In other words, one pair of permanent magnets is composed of a pair of permanent magnets with N and S poles alternately magnetized on the flat surface of a disc-shaped or arc-shaped magnet.
One is arranged around the rotation axis on the end face in the rotation axis direction of the rotation member, and the other one is placed on the surface of the fixed member facing the end face (by disposing two parts, when the rotation member is rotated, When a pair of magnets with the same polarity face each other, they repel each other and the rotating member is not fixed and is in an unstable state.On the other hand, when a pair of magnets with different polarities face each other, they attract each other and rotate. The moving member will be fixed at that position.In the end, the rotating member will make a ratchet-like movement at the same pitch as the magnetized pibuts of the N and S poles of the arranged permanent magnets, and the rotating member will move with a sense of moderation. Since the rotational positioning can be adjusted and uses the attraction and repulsion of magnets, the rotational resistance force does not change even after long-term use, and positioning can be performed reliably.

Example Next (-1) Detailed explanation of the present invention.

Example 1 Ventilator grill (taking Fig. 1 and Fig. 2 as an example, on the end face of the grill body 1 in the direction of the rotation axis 2,
A disk-shaped permanent magnet 3, which has been radially multi-poled and surface-magnetized in advance, is fixed by bonding or embedding so that it has the same center as the magnet with the same number of poles. Another permanent magnet 3' is fixed to the inner surface of the fixing member 4, which is the frame of the grill body 1, with the center aligned with the permanent magnet 3.The opposing pair of permanent magnets 3.3' However, they may be placed apart to the extent that they do not lose their mutual adsorption and repulsion.

A pair of permanent magnets may be used on both the left and right end faces of the grill body 1, but it is sufficient to arrange the permanent magnets on only one end face and have the other end face simply have a rotating shaft and a hole fitting structure. You can achieve your goal. Although the operating principle remains the same even if the number of N-8 poles of the permanent magnet is several, it is better to use a number of 10 to several 10 poles in order to obtain a nearly stepless smooth rotational motion. The shape of the magnet is not limited to a disk shape, but may be an arc shape within the range of the rotation angle, or one of a pair of opposing magnets may be an arc shape.

Embodiment 2 FIGS. 3 and 4 show examples of ashtrays for automobiles. On the end face of the ashtray body 5 in the direction of the rotation axis 2', a disk-shaped permanent magnet 3, which has been radially multi-poled and magnetized in the same plane, is glued or buried so that it has the same center as the rotation axis 2'. Fix by a method such as molding. Fifty-one permanent magnets 3' magnetized to have the same number of poles are fixed to the inner surface of the fixing member 4' with their centers aligned with the permanent magnets 3. The pair of opposing permanent magnets 3.3' may be placed in contact with each other, or may be placed apart to the extent that they do not lose their mutual attraction and repulsion.

In addition to the above, the present invention can be similarly applied to a wind direction adjusting member for an air outlet of a room cooler.

Effects of the Invention By applying a pair of disc-shaped or arc-shaped permanent magnets subjected to multipolar surface magnetization to the above-mentioned (two-turning member), the present invention can overcome the advantages of the conventional structure (= It can produce smooth and moderate rotation of the pile, and has the remarkable effect that the resistance to rotation does not change even after long-term use.

[Brief explanation of the drawing]

Fig. 1 is a front cross-sectional view of a ventilator grill showing one embodiment of the present invention, Fig. 2 is a partially cutaway side view of the grill main body in Fig. 1, and Fig. 3 shows another embodiment of the invention. FIG. 4 is a partially cutaway front view of the automobile ashtray, and FIG. 4 is a side view of the ashtray main body in FIG. 3.

Claims (3)

[Claims] 1. Disk-shaped or arc-shaped permanent magnets with N and S poles magnetized alternately are arranged around the rotation axis on the end face in the direction of the rotation axis of the rotation member, and one magnet faces the end face of the rotation member. A positioning and fixing device for a rotary member, characterized in that a permanent magnet having north and south poles magnetized at the same pitch is arranged on a surface of the fixed member in contact with or in close proximity to the permanent magnet. 2. 2. A positioning and fixing device for a rotating member according to claim 1, wherein the rotating member is a grill body of a ventilator grill for an automobile. 3. 2. A positioning device for a rotating member according to claim 1, wherein the rotating member is an ashtray body for an automobile.