JPH0531757Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a component mounting device that supports components such as gears on a metal substrate.

[Summary of the idea]

The present invention provides a component mounting device in which components are supported by a component support member on a metal substrate.
A component supporting member, a freely rotatable rotating member, and a locking member are integrally molded with a synthetic resin on a metal substrate, and the rotating member is rotated to prevent the component from falling off from the component supporting member. By locking the rotating member to the locking member in the rotating state, the rotating member that overlaps the component supporting member in a plane can be molded at the same time as the component supporting member, and the rotating member can be securely molded. It was designed so that it could be locked.

[Conventional technology]

Conventionally, as a device for attaching gears etc. on a metal substrate, a boss is integrally molded on the metal substrate from synthetic resin, a shaft portion and a locking portion are integrally provided on this boss, and a gear is attached to the shaft portion of the boss. The gear is rotatably supported by inserting the shaft insertion hole, and a cap or C ring is fitted to the locking part of the boss to prevent the gear from coming off the shaft. It was hot.

[Problem that the invention attempts to solve]

However, as mentioned above, the device that prevents the gear from coming off the shaft by fitting a cap, C-ring, etc. to the locking part of the boss requires parts such as the cap and C-ring, and requires assembly work. It was extremely troublesome at times. Furthermore, during inspection and repair, etc., accidents often occur in which caps, C-rings, etc. that have been removed from the locking portions are mistakenly dropped into the device.

Therefore, the present invention prevents components from falling off from the component support member by rotating a rotating member integrally formed on a metal substrate, and also enables the rotating member to be reliably locked. It is.

[Means for solving problems]

The present invention includes a component support member that supports a component, a rotating member that is rotatable between a regulated position and a non-regulated position, and a locking member that locks the rotating member in the regulated position on a metal substrate. By integrally molding and providing the rotary member from synthetic resin, and by rotating the rotating member to the regulating position and locking it to the locking member,
The component is configured to prevent the component from falling off the component support member.

[Effect]

According to the present invention, by rotating the rotating member integrally formed on the metal substrate, the falling off of the component from the component supporting member is prevented.
No parts such as rings are required. Further, by rotating the rotating member, the rotating member that overlaps the component supporting member can be molded simultaneously with the component supporting member. Furthermore, the rotating member is reliably locked by a locking member at a position that prevents the component from falling off, and the locking member is also molded at the same time as the rotating member and the component supporting member.

〔Example〕

An embodiment in which the present invention is applied to an optical assembly for a compact disc player will be described below with reference to the drawings. Note that this optical assembly combines a mechanism for rotationally driving a disk and a mechanism for reproducing the disk into one structural component.

First, as shown in FIGS. 1 to 3, a metal substrate 1 is a metal plate having a substantially rectangular shape, and a motor 3 for rotationally driving a disk 2 is attached to the lower surface of one end of this metal substrate 1. ing. motor 3
The motor shaft of is projected above the metal substrate 1, and a turntable 4 is attached thereto. A substantially rectangular opening 5 is provided in the center of the metal substrate 1, and an optical head 6 for reading and reproducing the disk 2 is disposed within the opening 5. One end of the optical head 6 is guided by a guide shaft 7 and is movable in the radial direction of the disk 2 (in the direction of arrow a). A motor 8 for moving the optical head 6 is attached to the lower surface of one side of the metal substrate 1. This motor 8 and the motor 3
A printed circuit board 9 is fixed to the bottom surface of the disc 2, and this board 9 has a switch 10 for detecting the final movement position of the optical head 6 on the inner circumferential side of the disk 2 and a connector for supplying drive current to the motors 3 and 8. 11 etc. are provided. The motor shaft of the motor 8 is projected above the metal substrate 1, and a gear 12 is attached thereto.
is installed. Note that this gear 12 uses a helical gear. Then, the rotation of gear 12 by motor 8 is transmitted to gear 13, and this gear 1
3 is transmitted to the gear 14 at the lower part of the metal substrate 1, and the rotation of this gear 14 is transmitted to the rack 15 of the optical head 6 at the upper part of the metal substrate 1, so that the optical head 6 is moved. has been done. The rack 15 of the optical head 6 is also formed on a movable plate 17 urged by a spring 16, thereby eliminating backlash against the gear 14.

Next, as shown in FIGS. 1 and 4, the gears 13 and 14 are rotatably supported by bearings 20 and 21. These bearings 20 and 21 are integrally molded on the metal substrate 1 from synthetic resin, so-called outsert molding. Note that this expression will be used in the following explanation. Further, the metal substrate 1 includes support portions 22 and 23 that support the guide shaft 7;
a guide plate 24 for guiding the other end of the optical head 6;
The four leg portions 25 and the like are also outsert molded. These are a plurality of lands 2 formed by outsert molding on the upper or lower surface of the metal substrate 1.
6. They are connected to each other by 6. As shown in FIGS. 2 and 3, the guide shaft 7 is inserted from one support section 22 side to the other support section 23 side, and the land 26 formed near one support section 22 is inserted into the guide shaft 7. It acts as a stopper to prevent it from falling out.
Further, as shown in FIG. 4, the guide plate 24 is formed so as to surround one side of the opening 5 of the metal substrate 1 so as to have a U-shaped cross section. is engaged. Further, as shown in FIG. 1, the four legs 25 serve as legs when adjusting the operation of the optical head 6. Also, Figure 1~
As shown in FIG. 4, a gear 1 is provided on the top surface of the metal substrate 1.
A wall portion 28 is outsert molded to surround the gear 12, and prevents the lubricating oil applied to the gear 12 from scattering onto the optical head 6 and the like.

Next, as shown in FIG. 4, the gear 13 supported by the bearing 20 has a large diameter gear 30, a small diameter gear 31, and a shaft portion 32 between them that are integrally molded from synthetic resin. Large diameter gear 3
0, the outer diameter of the shaft portion 32 and the small diameter gear 31, respectively.
Assuming D ₁ , D ₂ , and D ₃ , D ₁ >D ₂ >D ₃ , and the shape has no undercut. Note that the large diameter gear 30 is a helical gear corresponding to the gear 12. The gear 14 supported by the bearing 21 is also made of a synthetic resin, in which a large-diameter gear 33, a small-diameter gear 34, and a shaft portion 35 between them are integrally molded, and the size relationship is as described above. It is similar to gear 13. The gear 13 is inserted into the shaft insertion hole 36 of the bearing 20 from above, and the large diameter gear 30 is inserted into the shaft insertion hole 36 of the bearing 20 from above.
is engaged with a gear 12 at the upper part of the metal substrate 1. Also, the gear 14 is connected to the shaft insertion hole 37 of the bearing 21.
The large diameter gear 33 is engaged with the small diameter gear 31 of the gear 13 at the bottom of the metal substrate 1, and the small diameter gear 34 is engaged with the rack 15 at the top of the metal substrate 1.

By the way, as shown in FIG.
Circular recesses 38 and 39 are formed on the inner surfaces of the large diameter gears 30 and 33 of No. 4, respectively, and these circular recesses 3
The bearings 20 and 21 are inserted up to the insides of the bearings 8 and 39. As a result, the lengths L ₁ and L ₂ of the bearings 20 and 21 in the axial direction can be made as large as possible, and the bearing 2
Gear 1 in shaft insertion holes 36 and 37 of 0 and 21
3 and 14 are prevented from falling. Also gear 13
is inserted into the bearing 20 from above, so the gear 13 contacts the upper end of the bearing 20. Moreover, since the large-diameter gear 30 of the gear 12 and the gear 13 is a helical gear, when the rotation of the gear 12 is transmitted to the large-diameter gear 30, the gear 13 has an upward or downward direction depending on the direction of rotation. The moving force of is applied. However, as shown in FIG. 5, an annular protrusion 40 is formed at the upper end of the bearing 20, and even if a downward moving force acts on the gear 13, the annular protrusion 40 prevents the gear 13 from moving.
Since the contact area with the gear 13 is reduced, the contact resistance is extremely small, and the gear 13 is rotated smoothly. Furthermore, an annular groove 41 is formed near the outer periphery of the shaft portion 32 within the circular concave portion 38 of the gear 13, and an annular convex portion 40 forms an R surface formed at the base end of the shaft portion 32.
The product is released to prevent it from coming into contact with. Furthermore, as shown in FIG. 4, the wall thickness t ₁ of the bearing 20 is formed to be approximately equal to the wall pressure t ₂ of the shaft portion 32 of the gear 13, and the material of the synthetic resin is also the same.
The expansion changes of the shaft portion 32 and the shaft portion 32 are approximately equal, and bite is prevented from occurring between the two. The same applies to the bearing 21 and the shaft portion 35 of the gear 14. In addition, the inner diameters of the upper end, middle, and lower end of the shaft insertion hole 36 of the bearing 20 are respectively D ₄ , D ₅ ,
If D ₆ , D ₄ ≒ D ₆ < D ₅ , and after the resin shrinks during molding, the structure is such that the radial direction of the shaft portion 32 of the gear 13 is received at the upper and lower ends of the shaft insertion hole 36. has been done.

As described above, the gears 13 and 14, in which the large-diameter gears 30, 33, the small-diameter gears 31, 34, and the shaft portions 32, 35 are integrally molded, are mounted on the bearings 20, 21 that are outsert-molded on the metal substrate 1. By inserting the gear 12 through the metal substrate 1 from the above direction, the rotation of the gear 12 is transmitted to the gears 13 and 14 on both the upper and lower surfaces of the metal substrate 1.
5 will be driven.

Next, as shown in Figs. 1, 2, 6 and 7, the thrust direction of the gears 13 and 14 is supported by thrust receivers 44 and 45.
are shaft portions 46 and 47, respectively.
The receiving portions 48 and 49 are formed integrally from synthetic resin and are perpendicular to the metal base plate 7. The shaft portions 46 and 47 are fixed to the upper and lower surfaces of the metal base plate 1.
The shafts 46, 47 are outsert molded so as to be rotatable. Engagement grooves 50, 51 for inserting a driver are formed above and below the shafts 46, 47.
At positions offset 180° from the receiving portions 48, 49, protrusions 52, 53 are integrally formed. Furthermore, on the outer circumferential surfaces of the shaft portions 46, 47, on the opposite side to the receiving portions 48, 49, locked portions 54, 55 consisting of protrusions are integrally formed. The tips of the locked portions 54, 55 have a rounded surface.

As shown in FIGS. 6 and 7 (FIG. 6 is a perspective view of the metal substrate 1), the thrust receivers 44 and 45 have their receiving portions 48 and 49 as shown by dashed-dotted lines. The metal substrate 1 is outsert-molded so as to protrude from the edge 1a of the metal substrate 1 and the edge 5a of the opening 5 at right angles. and thrust receiver 4
4 and 45 in the directions of arrows b and c, and the receiving parts 48 and 49 are rotated above the gear 13 and below the gear 14.
9 receives the gears 13 and 14 in the thrust direction. In addition, the gear 13,
Center protrusions 56 and 57 formed on the upper surfaces of the fourteen large-diameter gears 30 and 33 are brought into contact with each other. Furthermore, since the gear 13 is inserted into the bearing 20 from above, the thrust receivers 44 on these sides are used to prevent the gear 13 from slipping upward. By the way, as mentioned above, an upward moving force acts on the gear 13 depending on the direction of rotation, but by providing a gap between the center protrusion 56 of the gear 13 and the receiving part 48,
Even when an upward moving force acts on the gear 13, the receiving portion 48 is not subject to rotational load. Note that the shaft portion 4
The thrust receivers 44, 45 are prevented from falling by the protrusions 52, 53 at 6, 47. Furthermore, the upper and lower engagement grooves 50, 51 of the shaft parts 46, 47 are screwdriver insertion grooves when rotating the displacement receivers 44, 45, especially during automatic assembly; It also serves as a filler to prevent sink marks.

Next, as shown in Fig. 6, the thrust receiver 4
Lock members 60 and 61 are outsert molded on the lower and upper surfaces of the metal substrate 1 in the vicinity of the shaft portions 46 and 47 of the metal substrate 1. These lock members 60,
Reference numeral 61 indicates shaft portions 62 and 63 that penetrate through the metal substrate 1.
A locking recess 66 is formed between the connecting parts 64 and 65 (see FIG. 8). The surfaces of the connecting portions 64 and 65 on the side of the thrust receivers 44 and 45 are slopes 64a and 65a that are inclined with respect to the line connecting the shaft portions 62 and 63. Moreover, the shaft portion 62,
63 is connected to the land 26.

Then, as shown in Fig. 6, the thrust receiver 4
When 4 and 45 are rotated, their locked parts 5
The locking members 60, 61 are pressed by the locking members 4, 55 and are elastically deformed, and the locking members 60, 61 are held in a state where the locked parts 54, 55 are engaged with the locking recesses 66.
61 elastically returns, and the locking members 60, 61
Thrust receivers 44, 45 are locked by. Note that the connection parts 64 and 6 of the lock members 60 and 61
Due to the slopes 64a and 65a of 5, when locking the locked parts 54 and 55, the locking recess 66
After being smoothly introduced and locked, the locked parts 54, 5 are in a biting position with respect to the shaft parts 62, 63, and are securely locked. Also, the lock member 6
The elasticity of 0.0 and 61 is effectively exhibited because the connecting portions 64 and 65 act as leaf springs and the shaft portions 62 and 63 act as torsion springs. At this time, the land 26 connected to the shaft parts 62 and 63 is bent into a U-shape or the like, and the land 26 is bent into a U-shape or the like.
6 may be used.

As mentioned above, by configuring the thrust receivers that overlap vertically with the bearings 20 and 21 that are outsert-molded on the metal substrate 1 using the rotatable thrust receivers 44 and 45, Outsert molding can be performed on the metal substrate 1 at the same time as the bearings 20 and 21. The thrust receivers 44, 45 can be reliably locked in the thrust receiving state by the locking members 60, 61 which are similarly formed by outsert molding.

Although one embodiment of the present invention has been described above, the present invention is not limited to the embodiment, and various effective changes can be made based on the technical idea of the present invention.

For example, in the embodiment, a gear is shown as a component, a bearing is shown as a component support member, and a thrust receiver is shown as a rotating member, but these can be modified in various ways.

[Effect of idea]

The present invention provides a component supporting member, a rotating member, and a locking member integrally molded with synthetic resin on a metal substrate, thereby allowing the rotating member to rotate and preventing the component from falling off from the component supporting member. The rotating member can be reliably locked in the rotating state by the locking member. Therefore, the rotating member that overlaps the component support member in a plane can be molded at the same time as the component support member, parts such as caps and C rings are not required, and assembly work can be performed extremely easily. can. In addition, since it is only necessary to rotate the rotating member during inspection and repair, there is no accident such as a cap, a C-ring, etc. falling into the device, and the device is extremely safe.

[Brief explanation of drawings]

The drawings show an embodiment in which the present invention is applied to an optical assembly for a compact disc player, in which FIG. 1 is an exploded perspective view of the entirety, FIG. 2 is a perspective view of the entire assembled state, and FIG. 3 is a perspective view of the entire assembled state. is an overall plan view, FIG. 4 is an enlarged sectional view taken from the line arrow in FIG. 3 to explain rotation transmission by gears, FIG. 7 is a sectional view taken along the line in FIG. 6, and FIG. 8 is an enlarged sectional view taken in the direction shown in FIG. 6. In addition, in the symbols used in the drawings, 1...metal substrate, 13, 14...gear (parts), 20, 21...
... Bearing (component support member), 44, 45 ... Thrust receiver (rotating member), 46, 47 ... Shaft portion, 48,
49... Receiving part, 54, 55... Locked part, 6
0,61...Lock member, 66...Lock recess.

Claims (1)

[Claims for Utility Model Registration] A component support member that supports a component, a rotating member that is rotatable between a regulated position and a non-regulated position, and a locking member that locks the rotating member in a regulated position. is integrally molded and provided on a metal substrate from synthetic resin, and the rotating member is rotated to a regulating position and locked to the locking member, thereby preventing the component from falling off from the component supporting member. A component mounting device configured to prevent