JPH08135654A - Bearing - Google Patents

Abstract

PURPOSE: To inexpensively provide a bearing which can be simply installed in a bearing part of a base by an integral mold formed of synthetic resin by constituting it of three bearing pieces and three claw pieces, and arranging engagement projections on tip outside surfaces of the claw pieces. CONSTITUTION: First of all, a hole 7 into which claw pieces 4... of a bearing A can be inserted is arranged in a boss 6 of a base 5. An inside diameter of this hole 7 is formed almost equal to a diameter of a circular shape to connect outside surfaces of the claw pieces 4... to each other. A width of the boss 6 is formed equal to a length up to engaging step parts 4b of projections 4a from base end parts of the claw pieces 4. After a horizontal shaft B is inserted into the hole 7, the claw pieces 4... and bearing pieces 3, 3 and 3a are fitted in a clearance between the horizontal shaft B and the hole 7, and the bearing A is installed and used. Therefore, since the bearing pieces and the horizontal shaft B are elastically contact with each other, a relative movement of both is not hindered, and the base can be smoothly moved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing, and more particularly to a pickup for reading a recording disk in an audio device,
The present invention relates to a bearing used for movably supporting a precision part such as a head of a printer in a computer device on a horizontal axis.

[0002]

2. Description of the Related Art Conventionally, when moving precision parts such as the above-mentioned pickups and printer heads in the horizontal direction,
As shown in FIG. 5 and FIG. 6, it is formed by penetrating the horizontal shaft (10) fixed to the chassis of the equipment through the bearing hole (9) formed at one end of the base (8) supporting the precision parts. . A bearing sleeve (11) may be provided in this bearing hole as shown in FIG. Incidentally, the opposite side of the base (8) is formed so as to be able to move along the guide rail, and it is not generally performed to support the base by two horizontal axes. This is because it is difficult to set the parallelism of the two horizontal axes.

[0003]

In such a bearing structure, the biggest problem is the clearance between the shaft and the inner surface of the bearing. This clearance is preferably zero in terms of performance, but since relative movement is impossible with zero clearance, a clearance of 20 to 30 microns is usually provided. This clearance should be as small as possible, but it is impossible to reduce it further considering expansion and contraction due to temperature change. The existence of such a clearance poses a serious problem for the movement of the pickup or the head, which requires a high degree of accuracy.

Therefore, in the present invention, the clearance between the shaft and the inner surface of the bearing can always be kept at zero, and the bearing which can be easily mounted on the bearing portion of the base is inexpensively formed by a synthetic resin integrally molded product. The main purpose is to provide.

[0005]

In order to achieve the above object, the present invention takes the following technical means. That is, in the bearing according to the present invention, the flange plate (1) is an integrally molded product made of synthetic resin and has a shaft insertion hole (2) at the center.
And the flange plate arranged along a virtual circumferential surface
At least three bearing pieces (3), (3), and (3a) integrally projected from the inner edge of the shaft insertion hole of (1), and arranged along the virtual circumferential surface outside the bearing pieces and At least three claw pieces protruding from the flange plate (1) in the same direction as the bearing pieces
(4) ... and the inner surfaces of the bearing pieces (3), (3) and (3a) are formed in a planar shape and are formed to have a size that elastically presses the outer peripheral surface of the inserted shaft (5). The nail piece
(4) has a structure in which an engaging protrusion (4a) is provided on the outer surface of the tip.

[0006]

When the bearing (A) constructed as described above is used, the claw pieces (4) of the bearing (A) are first attached to the boss (6) of the base (5) as shown in FIGS. 3 and 4. A hole (7) that can be inserted is provided. The inside diameter of this hole (7) is
(4) It is formed to have almost the same diameter as the circle connecting the outer surfaces of. Further, the width of the boss (5) is formed to be equal to the length from the base end portion of the claw piece (4) to the engagement step portion (4b) of the protrusion (4a). And the hole
After inserting the horizontal shaft (B) into (7), insert the claw pieces (4) ... and the bearing pieces (3), (3), (3a) into the gap between the horizontal shaft (B) and the hole (7). By doing so, the bearing (A) is mounted and used.

[0007]

Embodiments of the present invention will be described below with reference to the embodiments shown in the drawings. 1 to 4, reference numeral (A) indicates a bearing according to the present invention, and a shaft insertion hole is provided at the center.
A flange plate (1) having (2), three bearing pieces (3) arranged along an imaginary circumferential surface and integrally projected from an inner edge of the shaft insertion hole of the flange plate (1), 3) and (3a), and three claw pieces which are arranged outside the bearing piece along the virtual circumferential surface and project from the flange plate (1) in the same direction as the bearing piece.
(4) It consists of and. Each of these parts is integrally formed of a synthetic resin material, preferably a high-molecular synthetic resin material. In the present embodiment, the three bearing pieces and the three claw pieces are arranged at equal intervals, thereby equalizing the loads received by the pieces.

The inner surfaces of the bearing pieces (3), (3) and (3a) are formed in a flat shape and are dimensioned to elastically press the outer peripheral surface of the shaft (B) to be inserted. In this embodiment, of the three bearing pieces (3), (3), (3a), one bearing piece (3a) is made thicker to be inelastic, and the other two bearing pieces (3a) are formed. Bearing piece
Although the shafts are pressed against the bearing pieces (3a) by imparting elastic force to (3) and (3), they may be formed by imparting three coelastic forces.

Further, on the outer surfaces of the tips of the claw pieces (4) ..., Engaging projections (4a) having a directivity with an inclined surface facing the tips are provided. The nail pieces (4) ... Are also provided with appropriate elasticity.

In using the bearing (A) constructed as described above, first, as shown in FIG. 3 and FIG.
The boss (6) of (5) is provided with a hole (7) through which the claw pieces (4) of the bearing (A) can be inserted. The inner diameter of this hole (7) is formed to be approximately equal to the diameter of a circle connecting the outer surfaces of the claw pieces (4).
Further, the width of the boss (6) is formed to be equal to the length from the base end portion of the claw piece (4) to the engagement step portion (4b) of the protrusion (4a).

After inserting the horizontal shaft (B) into the hole (7), the claw pieces (4) and the bearing pieces (3), () are inserted in the gap between the horizontal shaft (B) and the hole (7). 3) Insert the bearing (A) by inserting the (3a).
The bearing (A) must be set in the hole (7) first and the horizontal shaft (B)
May be inserted. Bearing mounted in this way
(A) prevents the engaging projection (4a) of the claw piece (4) from engaging with the opening edge of (7) and coming out of the hole, and the bearing piece (3),
The flat inner surface of (3) and (3a) is a horizontal axis (B) with point or line contact, respectively.
Bearings (A)
The clearance between the shaft and the horizontal shaft (B) can be maintained at zero, and even if the bearing piece expands and contracts due to temperature changes, the clearance can be maintained at zero at all times, eliminating subtle rattling during movement. In addition, since the bearing piece and the horizontal shaft (B) are elastically in contact with each other, the relative movement of the two is not hindered and the base (5) can be moved smoothly.

As shown in the embodiment, one of the three bearing pieces (3), (3) and (3a) is formed in a non-elastic manner by increasing the thickness of one bearing piece (3a). However, when the other two bearing pieces (3), (3) are formed by giving an elastic force, the inelastic bearing piece (3a) is directly overlaid as shown in FIGS. 2 and 4. It is good to attach so that. As a result, a large amount of shaft load can be received by the strong bearing piece (3a), and the load on the other relatively weak elastic bearing pieces (3), (3) can be reduced.

Although the embodiments considered to be typical of the present invention have been described above, the present invention is not necessarily limited to the structures of these embodiments. For example, the number of bearing pieces and claw pieces described above is not limited to three, and may be four or five.
In addition, the present invention can be implemented by appropriately modifying it within the scope of providing the constituent elements, achieving the object of the present invention, and achieving the following effects.

[0014]

As described above, in the bearing according to the present invention, the engaging projection of the claw piece engages with the opening edge portion of the hole of the base so that it can be surely mounted in the hole, and at the same time, the bearing piece. Since the flat inner surface of the bearing contacts the outer circumferential surface of the horizontal shaft by point or line contact and press-contacts in the axial direction, the clearance between the bearing and the horizontal shaft can be maintained at zero, and the bearing piece expands and contracts due to temperature changes. However, the clearance can always be maintained at zero, and subtle rattling during movement can be eliminated, and since the bearing piece and the horizontal shaft are in elastic contact with each other, relative movement between the two is possible. The base can be moved smoothly without being blocked. In addition, it can be easily installed by pushing it between the inner surface of the hole of the base and the horizontal shaft, and it is easy to assemble, and the bearing itself is made of a synthetic resin material and can be manufactured at low cost. There are various remarkable effects such as being possible.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a bearing according to the present invention.

FIG. 2 is a rear view of the bearing.

FIG. 3 is a perspective view showing a usage state of the bearing.

FIG. 4 is a cross-sectional view of the usage state.

FIG. 5 is a perspective view showing an example of a conventional bearing structure.

FIG. 6 is a perspective view showing another example of a conventional bearing structure.

[Explanation of symbols]

 (1) Flange plate (2) Insertion hole (3) Bearing piece (4) Claw piece (4a) Claw piece engagement protrusion (A) Bearing

Claims (1)

[Claims] 1. An integrally molded product made of synthetic resin, comprising a flange plate (1) having a shaft insertion hole (2) at the center, and a shaft of the flange plate (1) arranged along a virtual circumferential surface. At least three bearing pieces integrally projected from the inner edge of the insertion hole
(3), (3), and (3a), and at least three claws arranged along the virtual circumferential surface outside the bearing piece and projecting from the flange plate (1) in the same direction as the bearing piece. The inner surfaces of the bearing pieces (3), (3), (3a) are formed in a planar shape and are dimensioned to elastically press the outer peripheral surface of the inserted shaft (5). A bearing characterized in that the engaging piece (4a) is formed, and the engaging piece (4a) is provided on the outer surface of the tip of the claw piece (4).