JP2000030381A - Optical pickup feeding mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical pickup feeding mechanism capable of reducing the effect of the vibration of a lead screw on an optical pickup at the time of high-speed rotation, resistant to the disengaging of the lead screw from an engaging part caused by shocks, and highly durable. SOLUTION: In the optical pickup feeding device provided with a motor 2, a lead screw 3 having a screw groove on the surface and driven by the motor 2 to rotate, a carriage 11 linearly moved while loading an optical pickup on it, engaging parts 13 and 16 engaged with the screw groove of the lead screw 3 and transmitting members 12 and 15 having the engaging parts 13 and 16 attached thereto for transmitting linear driving force to the carriage, the two sets of the transmitting members 12 and 15 made of materials having elasticity in vertical and upper/lower directions with respect to the axial direction of the lead screw 3 are used, and the transmitting members 12 and 15 are attached to the carriage 11 so as to oppose the engaging parts 13 and 16 of the transmitting members 12 and 15 to each other while interposing the lead screw 3 therebetween.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feed mechanism for an optical pickup used for reading and writing information on a medium disk used as a recording medium in optical recording and magneto-optical recording, and more particularly, to using a motor and a lead screw. The present invention relates to a feed mechanism of an optical pickup that performs positioning by positioning.

[0002]

2. Description of the Related Art Conventionally, compact disks (C
D), mini disk (MD), digital video disk (or digital versatile disk: DV)
An optical pickup is used as a recording / reproducing apparatus using an optical recording or magneto-optical recording technique such as D), and a method using a motor and a lead screw as a driving method of the optical pickup is known. FIG. 14 is a perspective view showing an example of a configuration of a feed mechanism of an optical pickup using a conventional lead screw. In FIG. 14, a carriage 1 is supported by a lead screw 3 and a guide shaft 4 connected to an output shaft of a motor 2 so as to linearly advance and retreat. An optical pickup 9 is attached to the carriage 1, and a projection 10 having a through hole for inserting the lead screw 3 is provided to project from the carriage 1 main body, and the guide shaft 4 is inserted into the carriage main body. Through holes are formed. Further, the meshing portion 6 meshing with the thread groove on the lead screw 3 is
, And the transmission member 5 is fixed to the carriage 1 by screws 7. On the other hand, a rigid support portion 8 is formed integrally with the carriage 1 at a position facing the engagement portion 6 via the lead screw 3 so that the rigid support portion 8 and the engagement portion 6 sandwich the lead screw 3. Has become. When the motor 2 is driven and the lead screw 3 rotates, a driving force for linearly moving the lead screw 3 in the axial direction is applied to the meshing portion 6 meshing with the thread groove on the lead screw 3. Then, the driving force of the engagement portion 6 is transmitted to the carriage 1 by the transmission member 5, and the carriage 1 moves parallel to the guide shaft 4 and the lead screw 3 in the axial direction. Accordingly, when the carriage 1 moves, the optical pickup 9 on the carriage 1 also moves.
The meshing portion 6 is urged (applied pressing force) toward the outer peripheral surface of the lead screw 3 by the transmission member 5, and a rigid support portion 8 is provided on the opposite side of the lead screw 3 with the lead screw 3 therebetween. 3, so that the engagement with the lead screw 3 does not come off with a slight vibration. Further, as another example of the prior art, for example, Japanese Patent Application Laid-Open No. Hei 9-120649 assumes that a rack (a transmission member including a meshing portion) for transferring a carriage is disengaged from a thread groove on the outer periphery of a lead screw when an impact occurs. Further, a configuration is disclosed in which a permanent magnet is installed in a rack and a magnetic material is used as a lead screw. With this configuration, even if the pressing force applied to the lead screw to prevent the rack from slipping out of the screw groove of the lead screw is reduced, the rack is pulled by the screw of the lead screw because the magnetic attraction force is added. It is possible to return to the groove, and as a result, the pressing force on the lead screw can be reduced, and the driving force of the motor can be reduced. By the way, in the field of optical recording and magneto-optical recording, high-speed recording and reproduction are required, and therefore, an optical pickup is also required to be able to send as fast as possible.

[0003]

However, when the rotation speed of the motor is increased to increase the rotation speed of the lead screw to increase the speed, the vibration generated in the lead screw increases, and the vibration is generated by the rigid support portion or the protrusion. There is a problem that the light is transmitted to the optical pickup on the carriage via the support having little elasticity, such as the portion 10, and adversely affects the performance of the optical pickup. Further, in the conventional configuration, since the meshing portion that meshes with the screw groove of the lead screw is one place, when a strong impact is given, the meshing of the screw groove of the lead screw and the meshing portion is disengaged,
There has been a problem that the track of the optical pickup tends to be displaced. Further, in the conventional configuration, the rigid support portion fixed to the opposite side of the meshing portion across the lead screw also contacts the lead screw, but in this case, the lead screw and the rigid support portion contact on a relatively large plane. Therefore, there is a problem that friction occurs at the contact portion and durability is deteriorated. The present invention has been made in order to solve the conventional problems as described above, and alleviates the adverse effect on the optical pickup due to the vibration of the lead screw generated at the time of high-speed rotation. It is an object of the present invention to provide a feed mechanism for an optical pickup which prevents slippage and has excellent durability.

[0004]

According to a first aspect of the present invention, there is provided an optical pickup feed mechanism having a motor for generating a rotational driving force and a screw groove on a surface thereof. A lead screw that is rotationally driven by a motor, a carriage that has a through hole through which the lead screw is inserted, and that moves linearly with an optical pickup mounted thereon, and that linearly drives the rotational driving force of the lead screw by meshing with the screw groove of the lead screw. An optical pickup feed mechanism comprising: a meshing portion that converts the force into a force; and a plurality of transmitting members that support the meshing portion and transmit the linear driving force obtained by the meshing portion to the carriage. Is
A member made of a material having elasticity in a direction perpendicular to an axial direction of the lead screw and in a vertical direction, wherein each of the transmission members is fixed to a vertical position of a carriage with the lead screw interposed therebetween, and meshes with an opposing surface of each transmission member. The parts are each protruded. The feed mechanism of the optical pickup according to the present invention according to claim 2, wherein a motor for generating a rotational driving force, a lead screw having a screw groove on its surface and rotationally driven by the motor, and a penetrating through the lead screw. A carriage having a hole and linearly moving the optical pickup mounted thereon, a meshing portion meshing with the screw groove of the lead screw to convert the rotational driving force of the lead screw into a linear driving force, and supporting the meshing portion and the meshing And a plurality of transmission members for transmitting the linear driving force obtained by the section to the carriage, wherein one of the transmission members is made of an elastic material, and the other transmission member is made of a rigid body. The lead screw is configured to be sandwiched by a meshing portion projecting from opposed surfaces of both transmission members, and the one transmission member is The transmission member is made of a material having elasticity in a direction perpendicular to the axial direction of the screw and in the up-down direction, and a second engagement portion is provided on the other rigid transmission member at a position facing the engagement portion of the one transmission member. Is provided.
According to a third aspect of the present invention, in the apparatus of the optical pickup feed mechanism according to the first or second aspect, each of the transmission members is made of a magnetic material, and at least one of the transmission members is magnetized. It is characterized by being. According to a fourth aspect of the present invention, in the optical pickup device according to the first or second aspect, a permanent magnet is attached to at least one of the engagement portions, and the permanent magnet is not attached. Wherein the transmitting member is made of a magnetic material. According to a fifth aspect of the present invention, in the apparatus of the feed mechanism of the optical pickup according to the first or second aspect, at least one of the transmission members includes:
The transmission member to which a permanent magnet is attached, and to which the permanent magnet is not attached, is made of a magnetic material. According to a sixth aspect of the present invention, in the apparatus of the feed mechanism of the optical pickup according to any one of the first to fifth aspects, a tubular elastic body is attached to an inner wall of the through hole provided in the carriage. It is characterized by having been done.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on illustrated embodiments. FIG. 1 is a perspective view showing a first embodiment of a feed mechanism for an optical pickup according to the present invention, and FIG.
3 is an AA ′ cross-sectional view of the first embodiment of FIG. 1, and FIG. 3 is an AA ′ cross-sectional view of the first embodiment of FIG. 1 when an impact force is applied to a main part. It is. In addition, FIG.
3, parts having the same functions as those of the conventional optical pickup feed mechanism shown in FIG. 14 are denoted by the same reference numerals. As shown in FIG. 1, the feed mechanism of the optical pickup according to the present embodiment has a configuration in which a carriage 11 is supported by a lead screw 3 and a guide shaft 4 connected to a motor 2. An optical pickup 9 is attached to a carriage 11 formed of a resin material or the like, and two protrusions 17 having through holes through which the lead screw 3 is inserted.
Is formed integrally with one side of the flat carriage 11, and a through hole 19 through which the guide shaft 4 is inserted is formed on the side opposite to the protrusion 17. Further, a first meshing portion 13 as a projection meshing with a thread groove on the outer periphery of the lead screw 3 is attached to a first transmission member 12 fixed to the upper surface of the carriage 11 by a screw 14. The first transmission member 12 is a member made of a metal material or the like as a leaf spring that can be elastically deformed in the vertical direction. At a position facing the first meshing portion 13 with the lead screw 3 interposed therebetween, a second meshing portion 16 meshing with the thread groove on the lead screw 3 is provided.
Is fixed. The second transmission member 15 is made of a metal material or the like that elastically deforms in the vertical direction, and is fixed to a lower surface of the carriage 11 by a screw 14 (not shown). The lead screw 3 is sandwiched between the first engagement portion 13 attached to the first transmission member 12 having elasticity and the second engagement portion 16 attached to the second transmission member 15 having elasticity.

The motor 2 is driven to drive the lead screw 3
Is rotated, a driving force for linearly moving in the axial direction of the lead screw 3 is applied to the meshing portions 13 and 16 meshing with the thread grooves on the lead screw 3. Then, the driving force of the meshing portions 13 and 16 is transmitted to the carriage 11 by the transmission members 12 and 15, and the carriage 11 moves parallel to the guide shaft 4 and the lead screw 3 in the axial direction. Accordingly, when the carriage 11 moves, the optical pickup 9 on the carriage 11 also moves. The meshing portions 13 and 16 are urged by the transmission members 12 and 15 in a direction to sandwich the lead screw 3. Therefore, even when an impact force is generated, one of the engagement portions 13 and 16 is engaged with the lead screw 3, and the engagement with the lead screw 3 is not released.

FIG. 3 is a cross-sectional view showing a state where the state shown in FIG. 2 changes when an impact force is applied from below. In FIG. 3, the lower engagement portion 16 is disengaged from the lead screw 3,
The upper meshing portion 13 keeps meshing with the lead screw 3. Therefore, the meshing with the lead screw 3 is ensured by the meshing portion 13, and when the impact is eliminated, the meshing between the lower meshing portion 16 and the lead screw 3 is restored again by the elasticity of the transmission member 12. In addition, the relationship between the engagement portions 13 and 16 and the transmission members 12 and 15 is also reversed with respect to the impact force from above in the figure, but it is also possible to continue to ensure engagement with the lead screw 3 in the same manner. it can. Further, the transmission member 12 having elasticity
And 15 can secure the engagement between the engagement portion and the lead screw against the vibration caused by the high-speed rotation of the lead screw as in the case where the above-mentioned external impact force is applied, and the track of the optical pickup is displaced. Thus, a stable optical pickup feed mechanism is provided.

FIG. 4 is a sectional view showing a main part of a second embodiment of the present invention. In FIG. 4, a transmission member 21 having a U-shaped cross section is obtained by integrating the leaf spring transmission members 12 and 15 in FIG. The engaging portions 22 and 23 are attached so as to face the inside of the upper and lower sides of the U-shape of the transmission member 21, and the vertical side of the U-shape of the transmission member 21 is attached to the carriage 11 by a screw (not shown). Fix or glue to. By configuring as shown in FIG. 4,
The engagement between the engagement portion and the lead screw described in the first embodiment can be secured, and the track of the optical pickup is prevented from slipping, so that a stable optical pickup feed mechanism is provided. As a result, the number of components of the transmission member can be reduced, and the number of steps for attaching to the carriage can be reduced.

FIG. 5 is a sectional view showing a main part of a third embodiment of the present invention. In FIG. 5, a member corresponding to the transmitting member 15 in FIG. 2 is used as a rigid supporting portion (transmitting member) 33 made of a non-elastic resin or the like.
The engaging portion 34 is attached to the lead screw 3 on the side 3 and fixed to the carriage 11 with an adhesive or the like. Also in the case of the embodiment of FIG. 5, a meshing portion 32 attached to a transmission member 31 as a leaf spring having elasticity,
Since the lead screw 3 is sandwiched by the meshing portion 34 attached to the rigid supporting portion 33 as a transmission member having no elasticity, the lead screw 3
4 can be prevented from coming off. However, in the case of FIG. 5, since it is not as strong against shock and vibration as when elastic transmission members are provided on the upper and lower sides of the lead screw in FIG. This is also suitable for cases where the occurrence of vibration is small. Alternatively, it is desirable to use a lead screw having a low processing accuracy even in a case where severe vibration does not occur due to a low rotation speed. By using a configuration as shown in FIG. 5, even if a rigid support such as an inexpensive resin is used,
The engagement between the engagement portion and the lead screw described in the first embodiment can be ensured, and the track of the optical pickup is prevented from slipping, so that there is obtained an advantage that a stable optical pickup feed mechanism is provided. be able to.

FIG. 6 is a sectional view showing a main part of a fourth embodiment of the present invention. 6, a rigid support (transmission member) 35 as a part of the carriage 11 is used instead of the rigid support 33 made of resin or the like having no elasticity in FIG.
Are integrally formed. In the case of the embodiment of FIG. 6 as well, as in the case of the third embodiment, a meshing portion 32 attached to a transmission member 31 as an elastic leaf spring and a rigid support as a non-elastic transmission member. Since the lead screw 3 is sandwiched by the meshing portion 36 attached to the portion 35, the meshing portions 32 and 36 are less likely to come off from the lead screw 3. In FIG. 6, since the rigid support portion is formed integrally with the carriage, the engaging portion described in the first embodiment can be used even at lower cost and with a reduced number of assembling steps than the third embodiment of FIG. And the lead screw can be engaged with each other, and the track of the optical pickup can be prevented from being displaced. Therefore, an advantage that a stable optical pickup feed mechanism can be provided can be obtained.

FIG. 7 is a sectional view showing a main part of a fifth embodiment of the present invention. In FIG. 7, transmission members 41 and 43 are formed by using a magnetic material for members corresponding to the transmission members 12 and 15 in FIG. 2, and the transmission member 41 on one side is magnetized. The magnetized transmission member 41 and the transmission member 43, which is a magnetic material, have an attractive force attracted by a magnetic force in addition to the elasticity of the magnetic material. This FIG.
Also in the case of the embodiment, the lead screw 3 is formed by the engaging portion 42 attached to the transmitting member 41 magnetized on the elastic magnetic material and the engaging portion 44 attached to the transmitting member 43 of the elastic magnetic material. Since the pinch is sandwiched, the engagement portions 42 and 44 are unlikely to be disengaged from the lead screw 3 by the elasticity and magnetic force of the transmission member. With the configuration as shown in FIG. 7, in addition to the ability to secure the engagement with the lead screw by the elasticity of the transmission member described in the above-described first embodiment, the engagement is also secured by the attraction force due to the magnetic force. As a result, it is possible to more reliably prevent the optical pickup from being out of track, and to provide a stable optical pickup feed mechanism.

FIG. 8 is a sectional view showing a main part of a sixth embodiment of the present invention. In FIG. 8, both the transmission members 41 and 43 are magnetized by using a magnetic material for both the leaf spring transmission members 41 and 43 in FIG. The magnetized transmission members 41 and 43 have an attractive force attracted by magnetic force in addition to the elasticity of the magnetic material. In the case of the embodiment of FIG. 8 as well, a meshing portion 42 attached to a transmission member 41 magnetized on an elastic magnetic material and a meshing portion 46 attached to a transmission member 45 magnetized on an elastic magnetic material are also provided. As a result, the lead screw 3 is pinched, so that the engagement portions 42 and 46 do not easily come off the lead screw 3 due to the elasticity and magnetic force of the transmission member. With the configuration as shown in FIG. 8, in addition to the ability of the transmission member described in the fifth embodiment to secure the engagement with the lead screw due to the elasticity and the magnetic force, the suction force due to the magnetic force is further increased to increase the power. Since the meshing can be ensured, the track of the optical pickup can be more reliably prevented from slipping, and a stable optical pickup feed mechanism can be provided. Note that the transmission members 33 and 35 as rigid bodies shown in FIGS. 5 and 6 are made of a magnetic material, or those magnetized therewith are also included in the present invention.

FIG. 9 is a sectional view showing a main part of a seventh embodiment of the present invention. FIG. 9 shows a configuration in which a meshing portion 53 is protruded from a lower surface of an upper transmission member 51 as a leaf spring via a permanent magnet 52. The transmission members 51 and 54 are both made of a magnetic material. Attraction force is generated between the transmission member 51 provided with the permanent magnet 52 and the transmission member 54 (or the meshing portion 55), which is a magnetic material, by magnetic force. This figure 9
Also in the case of the embodiment, the engagement portion 5 attached to the transmission member 51 made of an elastic material via the permanent magnet 52 is also provided.
Since the lead screw 3 is sandwiched between the transmission screw 3 and the engagement portion 55 attached to the transmission member 54 which is a magnetic material having elasticity, the engagement portions 53 and 55 are detached from the lead screw 3 by the elasticity and magnetic force of the transmission member. Disappears. With the configuration as shown in FIG. 9, in addition to the ability to secure the engagement with the lead screw by the elasticity of the transmission member described in the above-described fifth embodiment, the engagement is also ensured by the magnetic attraction. As a result, it is possible to more reliably prevent the optical pickup from being out of track, and to provide a stable optical pickup feed mechanism.

FIG. 10 is a sectional view showing a main part of an eighth embodiment of the present invention. FIG. 10 shows that permanent magnets 52, 5
7 shows an embodiment in which the meshing portions 53 and 58 are integrated through the joint 7. The transmitting member 51 provided with the permanent magnet 52 and the transmitting member 56 provided with the permanent magnet 57 have an attractive force attracted by magnetic force. In the case of the embodiment shown in FIG. 10 as well, a meshing portion 53 fixed to a transmission member 51 made of an elastic material via a permanent magnet 52 and a transmission member 56 provided with a permanent magnet 57 in an elastic material are also attached. Since the lead screw 3 is sandwiched between the engaging portions 58, the engaging portions 53 and 58 do not come off from the lead screw 3 due to the elasticity and magnetic force of the transmission member. With the configuration as shown in FIG. 10, the engagement between the engagement portion and the lead screw can be sufficiently ensured by increasing the magnetic attraction, so that the optical pickup track is more reliably prevented from slipping, A stable optical pickup feed mechanism can be provided.

FIG. 11 is a sectional view showing a main part of a ninth embodiment of the present invention. FIG. 11 shows the upper and lower transmission members 6.
1 and 64 are constituted by leaf springs, meshing portions 62 and 65 are provided on the opposing surfaces, and a magnet 63 is fixed to the lower surface of the distal end of the transmission member 61. Attraction force generated by magnetic force is generated between the transmission member 61 provided with the permanent magnet 63 and the transmission member 64 made of a magnetic material. Also in the case of the embodiment of FIG. 11, the lead screw 3 is sandwiched between the meshing portion 62 attached to the transmission member 61 and the meshing portion 65 attached to the transmission member 64. The engagement portions 62 and 65 with the screw 3 do not come off. This FIG.
With this configuration, as in the fifth and seventh embodiments described above, the engagement can be ensured by the attraction force due to the elasticity of the material and the magnetic force, so that the track of the optical pickup can be more surely displaced. It is possible to provide an optical pickup feeding mechanism that is prevented and is stable.

FIG. 12 is a sectional view showing a main part of a tenth embodiment of the present invention. FIG. 12 shows that the upper and lower transmission members 71 and 76 made of leaf springs
5 and the permanent magnets 73 and 77 are fixed to the front end facing surfaces of the transmission members 71 and 76, respectively. Attraction force is generated between the transmission member 71 provided with the permanent magnet 73 and the transmission member 76 provided with the permanent magnet 77 by magnetic force. Also in the case of the embodiment of FIG. 12, the engagement portion 7 attached to the transmission member 71 made of an elastic material is also used.
Since the lead screw 3 is sandwiched by the meshing portion 75 attached to the transmission member 76 made of a material having elasticity, the meshing portions 72 and 75 are not easily detached from the lead screw 3 by the elasticity and magnetic force of the transmission member. With the configuration as shown in FIG. 12, it is possible to sufficiently secure the engagement between the engagement portion and the lead screw by the elasticity and the magnetic force described in the ninth embodiment by further increasing the attraction force by the magnetic force. The optical pickup truck is more reliably prevented from slipping off,
A stable optical pickup feed mechanism can be provided. The transmission member 3 as a rigid body shown in FIGS.
A permanent magnet may be fixed to 3, 35, or the side of the transmitting member 31 facing the same.

FIG. 13 shows a main part of an eleventh embodiment of the present invention, and corresponds to a sectional view taken along the line BB 'of the first embodiment of FIG. A protrusion 81 having a through hole 85 through which the guide shaft 4 penetrates and a through hole 83 through which the lead screw 3 penetrates is provided on the carriage 81 shown in FIG.
(Corresponding to the protrusion 17 in FIG. 1). A cylindrical tube 84 made of an elastic material having an inner diameter larger than the outer diameter of the lead screw 3 is inserted into the through hole 83. With the configuration as shown in FIG. 13, the force transmitted to the carriage 81 can be attenuated against vibration and impact generated in all directions perpendicular to the axial direction of the lead screw 3. By using the optical pickup in combination with the above-described first to tenth embodiments, it is possible to further prevent the optical pickup from being out of track, and to provide a more stable optical pickup feed mechanism. In each of the above-described embodiments, the lead screw 3 is sandwiched between the two meshing portions from above and below. However, the direction in which vibration or impact is generated, the direction of urging by an elastic material, the layout in the optical pickup device, or the like. Due to the restrictions of
It may be inserted diagonally. Further, in each of the embodiments described above, the set of meshing portions that sandwich the lead screw 3 is described as one set, but it is not necessary to limit to one set, and the meshing portions of a plurality of sets arranged in the axial direction are not necessary. , The lead screw 3 may be sandwiched.

[0018]

As described above, according to the present invention, the carriage for moving the optical pickup is attached to the transmitting member so as to be sandwiched from above and below the lead screw by using two engaging portions which engage with the screw grooves of the lead screw. Since one of the transmission members is made of an elastic material, it is possible to reduce the influence of the vibration on the carriage due to the high-speed rotation of the lead screw. Further, even when an impact force is applied to the carriage, at least one of the transmission members is kept in mesh with the lead screw, so that the optical pickup track is prevented from slipping and the optical pickup feed is stabilized. In addition, when the vibration of the lead screw is small and does not cause any problem, by changing one of the transmission members from an elastic material to a rigid supporting portion, it is possible to reduce costs and man-hours in addition to the above effects. Furthermore, by using a magnetic material for the transmission member and the rigid support portion, or by magnetizing the magnetic material or installing a permanent magnet and utilizing magnetic attraction, the engagement with the lead screw is achieved only by the elasticity of the material. It is possible to prevent the track of the optical pickup from slipping more reliably and to stabilize the feed of the optical pickup as compared with the case where the optical pickup is secured.
In addition, by inserting a circular pipe made of an elastic material also into the inner periphery of the through hole through which the lead screw of the carriage penetrates, vibrations and impacts in all directions perpendicular to the lead screw shaft can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a first embodiment of a configuration of a feed mechanism of an optical pickup according to the present invention.

FIG. 2 is a cross-sectional view showing a main part according to the present invention, taken along the line AA ′ of the first embodiment in FIG. 1;

FIG. 3 is a cross-sectional view showing a case where an impact force is applied to a main part according to the present invention in an AA ′ cross section of the first embodiment of FIG. 1;

FIG. 4 is a sectional view showing a main part of a second embodiment of the present invention.

FIG. 5 is a sectional view showing a main part of a third embodiment of the present invention.

FIG. 6 is a sectional view showing a main part of a fourth embodiment of the present invention.

FIG. 7 is a sectional view showing a main part of a fifth embodiment of the present invention.

FIG. 8 is a sectional view showing a main part of a sixth embodiment of the present invention.

FIG. 9 is a sectional view showing a main part of a seventh embodiment of the present invention.

FIG. 10 is a sectional view showing a main part of an eighth embodiment of the present invention.

FIG. 11 is a sectional view showing a main part of a ninth embodiment of the present invention.

FIG. 12 is a sectional view showing a main part of a tenth embodiment of the present invention.

FIG. 13 is a cross-sectional view showing a main part of an eleventh embodiment of the present invention, and is a view corresponding to a cross-sectional view taken along the line BB ′ of the first embodiment of FIG.

FIG. 14 is a perspective view illustrating an example of a configuration of a feed mechanism of an optical pickup using a conventional lead screw.

[Explanation of symbols]

1, 11, 81 ... carriage, 2 ... motor,
3 ... lead screw, 4 ... guide shaft, 5, 1
2, 15, 21, 31, 41, 43, 45, 51, 5
4, 56, 61, 64, 71, 76 ... transmission member,
6, 13, 16, 22, 23, 32, 34, 36, 4
2, 44, 46, 53, 55, 58, 62, 65, 7
2, 75 ... engagement part, 7, 14 ... screw, 8, 3
3, 35: rigid support, 9: optical pickup,
10, 17, 82 ... Projection, 18, 19, 83, 8
5 ... through-hole, 52, 57, 63, 73, 77 ...
Permanent magnet, 84 ... elastic tubular tube

Claims (6)

[Claims] 1. A motor for generating a rotational driving force, a lead screw having a screw groove on its surface and rotationally driven by the motor, and a through-hole through which the lead screw is inserted. A carriage that engages with the thread groove of the lead screw and converts the rotational driving force of the lead screw into a linear driving force; and the carriage that supports the meshing portion and obtains the linear driving force obtained by the engaging portion. A plurality of transmission members for transmitting to the optical pickup, wherein each transmission member is a member made of a material elastically deformable in a direction perpendicular to the axial direction of the lead screw and in the vertical direction, Each transmission member is fixed to a vertical position of the carriage with a lead screw interposed therebetween, and a meshing portion is protruded from an opposing surface of each transmission member. Optical pickup feed mechanism, characterized in that there. 2. A motor for generating a rotational driving force, a lead screw having a screw groove on its surface and rotationally driven by the motor, and a through hole through which the lead screw is inserted. A carriage that engages with the thread groove of the lead screw to convert the rotational driving force of the lead screw into a linear driving force; and the carriage that supports the meshing portion and applies the linear driving force obtained by the engaging portion to the carriage. A transmission mechanism for an optical pickup, comprising: a plurality of transmission members for transmitting to one of the transmission members, wherein one of the transmission members is made of an elastic material, and the other transmission member is made of a rigid body, and is protruded from an opposing surface of both transmission members. And the one transmission member is arranged in a direction orthogonal to the axial direction of the lead screw. A light transmitting member, which is made of a material which can be elastically deformed in the vertical direction and has a meshing portion provided on the other transmitting member which is a rigid body at a position facing the meshing portion of the one transmitting member. Pickup feed mechanism. 3. Each transmission member is made of a magnetic material,
3. The feed mechanism of an optical pickup according to claim 1, wherein at least one of the transmission members is magnetized. 4. The apparatus according to claim 1, wherein a permanent magnet is attached to at least one of the meshing portions, and the transmission member to which the permanent magnet is not attached is made of a magnetic material. The feed mechanism of the optical pickup described in the above. 5. The transmission member according to claim 1, wherein a permanent magnet is attached to at least one of the transmission members, and the transmission member to which the permanent magnet is not attached is made of a magnetic material. The feed mechanism of the optical pickup described in the above. 6. The optical pickup according to claim 1, wherein a cylindrical elastic body is attached to an inner wall of the through hole provided in the carriage. mechanism.