CN212131229U - Gear unit and electronic apparatus - Google Patents
Gear unit and electronic apparatus Download PDFInfo
- Publication number
- CN212131229U CN212131229U CN202020065934.4U CN202020065934U CN212131229U CN 212131229 U CN212131229 U CN 212131229U CN 202020065934 U CN202020065934 U CN 202020065934U CN 212131229 U CN212131229 U CN 212131229U
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- Prior art keywords
- gear
- frame
- gear unit
- guide
- guide shaft
- Prior art date
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- 239000002184 metal Substances 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 244000309464 bull Species 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
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- Transmission Devices (AREA)
- General Details Of Gearings (AREA)
- Lens Barrels (AREA)
Abstract
A small gear unit and an electronic apparatus can be formed. The gear unit is configured to include: a motor having a motor output shaft extending in an axial direction; a guide screw rotated by power transmitted from the motor output shaft; a guide shaft that guides the guide screw; a gearbox supporting the motor; a frame supporting the guide screw, the guide shaft, and the gear case; and the connecting piece fixedly connects the frame and one side of the gear box, and the other side of the frame and the gear box is fixedly connected through the guide shaft.
Description
Technical Field
A form of the present invention relates to a gear unit and an electronic apparatus including the gear unit.
Background
In recent years, some driving devices mounted on small electronic apparatuses are provided with a guide screw for reciprocating an object in an axial direction of the guide screw. As an example of the above-described driving device, patent document 1 discloses a lens driving mechanism.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2016-51075
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved by the utility model
The configuration described in patent document 1 includes a base 10, an auxiliary member 16, a lens frame 30, a guide screw 41, and a motor 40, and the base and the auxiliary member are connected by a screw B. However, in the above-described conventional structure, since the fixation is performed on the premise of using the screw B, it is sometimes difficult to further save space.
Technical scheme for solving technical problem
The utility model discloses a solve above-mentioned technical problem etc. and adopt following technical scheme. In the following description, the reference signs in the drawings are shown in parentheses for the convenience of understanding the present invention, but the constituent elements of the present invention are not limited by the reference signs, but should be construed broadly as a range that can be understood by those skilled in the art.
A technical scheme of the utility model is a gear unit, include:
a motor (30), the motor (30) having a motor output shaft (31) extending in an axial direction;
a guide screw (70), the guide screw (70) being rotated by power transmitted from the motor output shaft (31);
a guide shaft (90), the guide shaft (90) guiding the guide screw;
a gearbox (20), the gearbox (20) supporting the motor;
a frame (10), the frame (10) supporting the guide screw (70), the guide shaft (90), and the gear case (20); and
a connecting member (11), the connecting member (11) fixedly connecting the frame and one side of the gear case,
the other side of the frame and the gear box is fixedly connected through the guide shaft (90).
According to the gear unit of the above configuration, the frame and the other connecting portion of the gear case are configured to be fixedly connected by the guide shaft. Therefore, it is not necessary to connect the other side with a connector such as a screw, and therefore, a space into which the connector is inserted is not necessary, and a space-saving structure can be formed as a whole.
In the gear unit, it is preferable that,
there is no connection on the other side to connect the frame to the gearbox.
In the gear unit, it is preferable that,
the gear unit also has a gear (50, 60) arranged between the motor output shaft and the guide screw,
the gear box also supports the gear.
According to the gear unit having the above configuration, the gear unit can be configured in a space-saving manner while performing desired acceleration/deceleration by the gear.
In the gear unit, it is preferable that,
the guide shaft extends in a direction substantially parallel to the axial direction.
According to the gear unit having the above configuration, the guide shaft, the guide screw, and the motor output shaft extend in the same axial direction, and therefore, a thin and compact structure can be achieved.
In the gear unit, it is preferable that,
both ends of the guide shaft are respectively pressed into holes formed in the frame.
According to the gear unit having the above configuration, since the guide shaft can be fixed to the frame by press-fitting the guide shaft into the frame, a simple and inexpensive configuration can be achieved without using welding or an adhesive.
The utility model discloses contain an electronic equipment including above-mentioned arbitrary gear unit.
According to the electronic apparatus, the gear unit can be small, and the electronic apparatus can be configured to drive, for example, a camera unit. Therefore, not only a configuration capable of driving the camera unit and the like can be formed, but also the electronic apparatus can be miniaturized.
Drawings
Fig. 1 is a perspective view of the gear unit.
Fig. 2 is a perspective view of the gear unit.
Fig. 3 is a side view of the gear unit.
Fig. 4 is a sectional view of the gear unit at a-a position of fig. 3.
Fig. 5 is an exploded perspective view of the gear unit.
(symbol description)
1 Gear Unit
10 frame
10a, 10b, 10c, 10d, 10e through hole
11 connecting piece
20 gearbox
20a and 20b holes
30 motor
31 motor output shaft
32 terminal
40 planetary gear mechanism
41 Sun Gear
42 planetary gear
43 planetary gear carrier
43a projection
44 output gear
70 guide screw rod
71. 72 shaft
81. 82 bearing
83a, 83b gasket
84 fastener
90 guide shaft
Detailed Description
The utility model discloses an one of the characteristics of gear unit lies in following aspect: the guide shaft is configured to guide the guide screw in the axial direction and to connect the frame to the gear box, and the number of screws for connecting and fixing the frame to the gear box is reduced as compared with the conventional structure, thereby achieving a structure that can be miniaturized.
The embodiments of the present invention will be explained based on the following configurations. However, the embodiments described below are merely examples of the present invention and should not be construed as limiting the technical scope of the present invention. In the drawings, the same components are denoted by the same reference numerals, and the description thereof may be omitted.
1. Detailed description of the preferred embodiments
2. The characteristics of the utility model
3. Supplementary items
< 1> embodiment >
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same reference numerals in different drawings denote parts having the same functions. In the following description, a direction in which the output shaft of the motor extends is sometimes referred to as an axial direction, and the direction is described with reference to the axial direction.
Fig. 1 to 5 are views showing a gear unit 1 according to the present embodiment. Fig. 1 and 2 are external perspective views of the gear unit, respectively viewed from different directions. Fig. 3 is a side view of the gear unit. Fig. 4 is a sectional view at a-a position of fig. 3. Fig. 5 is an exploded perspective view of the gear unit.
As shown in the drawing, the gear unit 1 of the present embodiment includes a frame 10, a gear box 20, a motor 30, a planetary gear mechanism 40, a first gear 50, a second gear 60, a guide screw 70, bearings 81 and 82, washers 83a and 83b, a fixing member 84, a guide shaft 90, and a link 11.
< Motor 30>
The motor 30 is, for example, a dc motor, and includes a plurality of terminals 32 and a motor output shaft 31. As is well known, the motor 30 is configured to include a rotor, a stator, and the like. The motor 30 is rotated by electric power supplied from a terminal 32, and a motor output shaft 31 is rotated. The motor output shaft 31 is connected to the sun gear 41 of the planetary gear mechanism 40. The motor output shaft 31 extends in the axial direction, and a guide screw 70 and a guide shaft 90, which will be described later, are arranged parallel to the axial direction.
< planetary Gear mechanism 40>
The planetary gear mechanism 40 is configured to include a sun gear 41, three planetary gears 42, a planetary carrier 43, and an output gear 44.
The sun gear 41 is coaxial with the motor output shaft 31 and is connected to the motor output shaft 31 as described above. Gear teeth are formed on the outer periphery of the sun gear 41. Three planetary gears 42 disposed on the outer periphery of the sun gear 41 mesh with the gear teeth of the sun gear 41. The three planetary gears 42 are provided with gear teeth on the outer periphery thereof, and have cylindrical through holes in the central portions thereof. Gear teeth on the inner periphery of an internal gear (not shown) mesh with gear teeth of the planetary gear 42. Through holes in the center portions of the three pinion gears 42 are respectively inserted with cylindrical protrusions 43a of the planetary carrier 43. An output gear 44 is disposed on the opposite side of the carrier 43 from the pinion 42, and the output gear 44 is formed coaxially with the carrier 43. The output gear 44 has gear teeth formed on an outer periphery thereof, and the output gear 44 meshes with a first large gear 52 of a first gear 50 described later.
The planetary gear mechanism 40 is a conventionally known mechanism, and when the sun gear 41 rotates, the planetary gear mechanism 40 accelerates and decelerates at a predetermined speed ratio to rotate the output gear 44.
< first Gear 50>
The first gear 50 is configured to include a first pinion gear 51 and a first bull gear 52. The first pinion gear 51 is coaxial with the first large gear 52, has gear teeth on the outer periphery thereof, and when one rotates, the other rotates. The first large gear 52 meshes with the output gear 44. That is, when the output gear 44 rotates, the first large gear 52 rotates, and the second small gear 51 rotates therewith.
< second gear 60>
The second gear 60 has gear teeth on the outer periphery, and the second gear 60 is engaged with the first pinion gear 51. The second gear 60 is connected to a shaft 71 extending from an end of the guide screw 70. The second gear 60 is coaxial with the guide screw 70 and the shafts 71, 72. When the second gear 60 rotates, the shaft 71 rotates, guiding the lead screw 70 and the shaft 72 to rotate therewith.
< guide screw 70>
The guide screw is formed in a substantially cylindrical shape extending in a direction parallel to the axial direction, and a feed screw made of, for example, a trapezoidal thread is formed on an outer peripheral surface thereof. A driving target is disposed on the guide screw 70 so as to engage with the feed screw, and when the guide screw 70 rotates, the driving target moves in the axial direction. When the guide screw is rotated in one direction, the object to be driven moves in one axial direction, and when the guide screw is rotated in the opposite direction, the object to be driven moves in the other axial direction.
< bearings 81, 82>
The bearings 81 and 82 are disposed on one side and the other side of the guide screw 70, respectively, and rotatably support the guide screw 70 and the second gear 60. The bearing 81 has a large diameter portion and a small diameter portion. The small diameter portion of the bearing 81 is inserted into the through hole 10d of the frame 10. The large diameter portion of the bearing 81 abuts against the frame 10 to prevent the bearing 81 from falling off from the through hole 10 d. The bearing 82 has a large diameter portion and a small diameter portion. The large-diameter portion of the bearing 82 is inserted into the through hole 10e of the frame 10. Washers 83a, 83b are disposed on the outer side in the circumferential direction of the small diameter portion of the bearing 82. The small diameter portion of the bearing 82 abuts against the mount 84 with the washers 83a, 83b interposed therebetween.
< gaskets 83a, 83b >
< guide shaft 90>
The guide shaft 90 is formed in a substantially cylindrical shape extending in a direction parallel to the axial direction, and is disposed on the opposite side of the motor 30 with respect to the guide screw 70. The guide shaft 90 is disposed on the other side of the frame opposite to the side on which the link 11 is disposed. Both end portions 90a, 90b of the guide shaft 90 are inserted into through holes 10b, 10c formed in the frame 10, respectively. Both end portions 90a, 90b of the guide shaft 90 are formed to be substantially the same size as the through holes 10b, 10c, and both end portions 90a, 90b of the guide shaft 90 are press-fitted into the through holes 10b, 10 c. Thereby, the guide shaft 90 is fixedly connected to the frame 10. One end 90a of the guide shaft 90 is inserted into the hole 20b of the gear housing 20. The end portion 90a is fitted into the hole portion 20b but is not press-fitted into the hole portion 20 b. Therefore, the outer peripheral portion of the end portion 90a may have a margin with respect to the inner peripheral portion of the hole portion 20 b.
< frame 10>
The frame 10 is a structure as a housing of the gear unit 1. The frame 10 is formed of metal. The frame 10 supports the guide screw 70, the guide shaft 90, and the gear box 20. Since the gear case 20 supports the motor 30 and the like as described later, the frame 10 functions as a housing that supports the entire gear unit 1.
The frame 10 has through holes 10a, 10b, 10c, 10d, 10 e. These through holes 10a, 10b, 10c, 10d, 10e each extend in a circular shape. The through holes 10b and 10c are formed coaxially. The through holes 10d and 10e are formed coaxially.
The through hole 10a is for inserting a connector 11 such as a screw. The through hole 10a is coaxial with the hole portion 20a of the gear housing 20. A thread to be fitted to the thread of the coupling 11 is formed on the inner periphery of the through hole 10 a. As described above, the through holes 10b and 10c allow the two end portions 90a and 90b of the guide shaft 90 to be inserted and fixed, respectively. The through hole 10d is inserted with the bearing 81. The through hole 10e is inserted with the bearing 82.
< gearbox 20>
The gear case 20 is formed of resin. The gear box 20 supports the motor 30, the planetary gear mechanism 40, the first gear 50, and the second gear 60. The gear housing 20 is supported by the frame 10.
The gear case 20 has hole portions 20a and 20 b. The hole portion 20a is a groove-like hole having a bottom, and into which the connector 11 is inserted. A thread is formed on the inner periphery of the hole 20a to be fitted with the thread of the coupling 11. The hole portion 20b is a hole extending along the axis of the guide shaft 90 with a part of the outer periphery removed. The hole 20b is fitted to the end 90a of the guide shaft 90 to support the end 90 a.
Further, a portion 20c near the end of the gear case 20 may be connected to a portion 10f of the frame 10 by a so-called snap-fit structure.
< connecting Member 11>
The connector 11 is inserted into the through hole 10a of the frame 10 and the hole 20a of the gear housing 20, and is screwed to the frame 10 and the gear housing 20. The connector 11 connects and fixes the frame 10 and the vicinity of one end of the gear case 20 by the screw fitting.
< fixing Structure of frame 10 and Gear case 20>
As described above, the frame 10 is screw-fixed to one end of the gear case 20 by the connection member 11. On the other hand, as described above, the other side of the frame 10 and the gear case 20 is fixed by the guide shaft 90.
Further, if the portion 20c of the gear housing 20 and the portion 10f of the frame 10 are connected by the snap-fit structure as described above, the frame 10 and the gear housing 20 can be connected more firmly without rattling, which is preferable.
< 2> features of the present invention
The present invention described above with reference to one embodiment has the following features.
The gear unit 1 of the above embodiment is configured such that the frame 10 and the gear case 20 are connected and fixed to each other by the link 11 on one side and the guide shaft 90 on the other side. In this way, since the guide shaft 90 has a function of connecting the frame 10 and the gear housing 20, it is not necessary to connect both sides by screws as in the conventional structure. Therefore, the space for disposing the coupling member on the other side is not required, and the gear unit can be configured to be space-saving as a whole.
The gear unit 1 of the above embodiment is configured such that the first gear 50 and the second gear 60 are disposed between the motor output shaft 31 and the guide screw 70, and the gear box 20 supports the first gear 50 and the second gear 60. According to the above configuration, the gear unit can be configured in a space-saving manner while performing desired acceleration/deceleration by the gear.
According to the gear unit 1 of the above embodiment, the guide shaft 90 is configured to extend in a direction parallel to the axial direction of the motor output shaft 31 of the motor 30. With the above configuration, the guide shaft 90, the guide screw 70, and the motor output shaft 31 extend in the same axial direction, and therefore, a thin and small gear unit can be configured.
According to the gear unit 1 of the above embodiment, both end portions 90a and 90b of the guide shaft 90 are press-fitted into the through holes 10b and 10c of the frame 10, respectively. With the above configuration, the guide shaft 90 can be fixed to the frame 10, and therefore, a simple and inexpensive gear unit can be configured without using welding or an adhesive.
The guide shaft 90 may be fixed to the frame 10 by inserting both end portions 90a and 90b of the guide shaft 90 into the through holes 10b and 10c of the frame 10, respectively, and bonding or welding.
The gear unit 1 of the above embodiment is mounted on a portable electronic device such as a smartphone, a tablet device, or a personal computer, and drives a camera unit or the like mounted on the portable electronic device. According to the electronic apparatus, not only can the configuration of driving the camera unit and the like be formed, but also the electronic apparatus can be miniaturized.
<3. supplementary items >
The embodiments of the present invention have been specifically described above. The above description is merely an explanation of one embodiment, and the scope of the present invention is not limited to the above embodiment, but should be interpreted broadly as a scope that can be grasped by those skilled in the art.
In the above embodiment, the structural example in which the frame 10 is formed of metal and the gear case 20 is formed of resin has been described, but the structure is not limited to the above, and the frame 10 may be formed of resin and the gear case 20 may be formed of metal. However, the frame 10 that press-fixes the guide shaft 90 is preferably formed of metal.
In the above embodiment, the description has been given by exemplifying the configuration including the planetary gear mechanism 40, but the configuration may be such that the planetary gear mechanism is not included. Further, the planetary gear mechanism may include a known acceleration/deceleration mechanism other than the planetary gear mechanism.
In the above embodiment, the description has been given by exemplifying the structure including the first gear 50 and the second gear 60, but the kind and number of the gears may be arbitrarily changed.
In the above embodiment, the motor 30 is exemplified by a dc motor, but a motor other than a dc motor may be used as the motor 30.
In the above embodiment, the screw was explained as the connector 11, but a rivet or the like may be used as the connector.
(availability in industry)
The utility model discloses be fit for as including being used for carrying out the gear unit etc. of driven guide lead screw to installing in smart mobile phone's camera.
Claims (8)
1. A gear unit, comprising:
a motor having a rotating shaft extending in an axial direction;
a guide screw rotated by power transmitted from the rotation shaft;
a guide shaft that guides the guide screw;
a gearbox supporting the motor;
a frame supporting the guide screw, the guide shaft, and the gear case; and
a connecting member fixedly connecting the frame and one side of the gear case,
the other side of the frame and the gear box is fixedly connected through the guide shaft.
2. The gear unit of claim 1,
there is no connection on the other side to connect the frame to the gearbox.
3. The gear unit of claim 1,
the gear unit further has a gear disposed between the rotating shaft and the guide screw,
the gear box also supports the gear.
4. The gear unit of claim 2,
the gear unit further has a gear disposed between the rotating shaft and the guide screw,
the gear box also supports the gear.
5. Gear unit according to one of the claims 1 to 4,
the guide shaft extends in a direction parallel to the axial direction.
6. Gear unit according to one of the claims 1 to 4,
both ends of the guide shaft are respectively pressed into holes formed in the frame.
7. The gear unit of claim 5,
both ends of the guide shaft are respectively pressed into holes formed in the frame.
8. An electronic device, characterized in that,
comprising a gear unit according to any one of claims 1 to 7.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-031610 | 2019-02-25 | ||
| JP2019031610A JP7221728B2 (en) | 2019-02-25 | 2019-02-25 | gear unit and electronics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212131229U true CN212131229U (en) | 2020-12-11 |
Family
ID=72262787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020065934.4U Expired - Fee Related CN212131229U (en) | 2019-02-25 | 2020-01-13 | Gear unit and electronic apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7221728B2 (en) |
| CN (1) | CN212131229U (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009288258A (en) * | 2008-05-27 | 2009-12-10 | Nidec Copal Corp | Lens unit |
| JP2011007866A (en) * | 2009-06-23 | 2011-01-13 | Olympus Imaging Corp | Driving device |
-
2019
- 2019-02-25 JP JP2019031610A patent/JP7221728B2/en active Active
-
2020
- 2020-01-13 CN CN202020065934.4U patent/CN212131229U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP7221728B2 (en) | 2023-02-14 |
| JP2020133850A (en) | 2020-08-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201211 |