TWI403778B - Clamping device and zooming device using same - Google Patents

Abstract

The present invention relates to a clamping device for clamping a motor. The motor includes a vibrating body. The vibrating body can vibrate along an axis direction thereof. The clamping device includes a lens carrying member and a securing member. The lens carrying member includes a receiving portion and a connecting portion connected to the receiving portion. The connecting portion defines a groove. The securing member includes a body and a pressing portion extending from one end of the body. The body is secured to the connecting portion of the lens carrying member, and the pressing portion is mated with the groove to cooperatively form a receiving space for receiving the vibrating body of the motor. Meanwhile, the vibrating body, the groove and the pressing portion are immovable relative to each other. The motor and the lens carrying member can be detached for convenient replacement of the motor and the lens carrying member. The present invention also provides a zooming device using the clamping device.

Description

Clamping device and zoom device having the same

The present invention relates to a clamping device and a zoom device having the same.

At present, digital products such as mobile phones, digital cameras, etc. generally have a zoom function. In order to realize the zoom function, a clamping device is usually provided in the camera module to clamp the motor to cause the motor to move the lens in the lens carrier of the clamping device to achieve zooming. The cooperation between the motor and the lens carrier is formed by integrally molding the lens carrier and the rotor of the motor, and the rotor and the stator of the motor are threaded to move the motor rotor to drive the lens carrier to move.

However, due to the limitation of the structure of the motor itself, the lens carrier and the rotor of the motor are integrally formed on the rotor and the stator of the motor, and the structure is complicated, and it is difficult to ensure design accuracy, thereby making the motor and the lens carrier easy to cooperate. When an error occurs and the lens carrier and the rotor of the motor are damaged, the motor and the lens carrier need to be replaced together, and the cost is high.

In view of the above, it is necessary to provide a clamping device having high accuracy and low cost and a zoom device having the same.

A clamping device for holding a motor. The motor has a vibrating body that is vibrated along its axial direction. The clamping device includes a lens carrier and a fixing member. The lens carrier includes a receiving portion and a connecting portion connected to the receiving portion. The connecting portion defines a recess. The fixing member includes a main body and a resisting elastic piece extending from the main body. Fixing the body to the connecting portion to cause the resisting elastic piece to be The grooves correspondingly form a receiving space for receiving the vibrating body of the motor, and the relative positions of the vibrating body, the groove and the resisting elastic piece are always maintained.

A zoom device includes at least one clamping device, at least one motor corresponding to the clamping device, and a guide bar. The motor has a vibrating body that is vibrated along its axial direction. The clamping device includes a lens carrier and a fixing member. The lens carrier is movably connected to the guiding rod, and includes a receiving portion and a connecting portion connected to the receiving portion. The connecting portion defines a recess. The fixing member includes a main body and a resisting elastic piece extending from the main body. The vibrating body of the motor is received in a receiving space formed by the recess of the fixing piece and the groove of the connecting portion of the lens carrier, and the vibrating body, the groove and the abutting The relative position of the shrapnel remains the same.

Compared to the prior art, the zoom device fixes the motor to the lens carrier by means of a fixing member of the clamping device. The motor and the lens carrier are separately designed, the structure is simple, the accuracy is high, and when the motor or the lens carrier is damaged, it can be replaced as needed, and the cost is low.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIGS. 1 and 2 , a zoom device 100 according to a first embodiment of the present invention includes a clamping device 110 , a motor 10 , and a guide bar 30 . The clamping device 110 is used to clamp the motor 10. The clamping device 110 includes a lens carrier 20 and a fixing member 40. The lens carrier 20 is movably coupled to the guide bar 30. The motor 10 is fixed to the lens carrier by the fixing member 40 The device 20 is provided to cause the motor 10 to move the lens carrier 20 along the guide bar 30.

The motor 10 includes a stator 12 and a vibrating body 14. In the present embodiment, the motor 10 is a piezoelectric motor. The stator 12 is electrically driven to vibrate the vibrating body 14 in the axial direction thereof so that the length of the vibrating body 14 is first lengthened and then shortened.

The lens carrier 20 includes a receiving portion 22 and a connecting portion 24 and a moving portion 25 respectively connected to the receiving portion 22. In the present embodiment, the accommodating portion 22 is integrally formed with the connecting portion 24 and the moving portion 25. The accommodating portion 22 is for accommodating a lens (not shown). The connecting portion 24 of the lens carrier 20 has an end face 28. The connecting portion 24 defines a recess 27 , and the recess 27 is located between the end surface 28 and the receiving portion 22 . The shape of the groove 27 is "L" shaped or "V" shaped. In the present embodiment, the shape of the groove 27 is a "V" shape. The moving portion 25 of the lens carrier 20 is movably connected to the guiding rod 30. The moving portion 25 of the lens carrier 20 moves along the guiding rod 30 to drive the lens received in the receiving portion 22 to move along the guiding rod 30 to zoom.

The fixing member 40 includes a main body 42 and a resisting elastic piece 44 extending from the main body 42. The body 42 is fixed to the end face 28 of the connecting portion 24. In this embodiment, the main body 42 is fixed to the end surface 28 by screwing. Specifically, as shown in FIG. 2 , a first screw hole 49 is defined in the main body 42 , and a second screw hole 29 is defined in the end surface 28 . The screw hole 49 and the second screw hole 29 respectively lock the main body 42 and the lens carrier 20 by a screw 45. The resisting elastic piece 44 corresponds to the recess 27 and together forms a receiving space for receiving the vibrating body 14 of the motor 20. The material of the fixing member 40 is an elastic material.

In order to enable the vibrating body 14 of the motor 10 of different sizes to be fixed to the lens carrier 20 by the fixing member 40, the clamping device 110 further includes a spacer 60. Gasket The shape of 60 corresponds to the shape of the groove 27 in an "L" shape or a "V" shape. In the present embodiment, the shape of the spacer 60 is "V" shaped. In the present embodiment, the spacer 60 is attached and fixed to the side wall of the recess 27. The spacer 60 and the abutting elastic piece 44 of the fixing member 40 together form a smaller receiving space for accommodating the vibrating body 14 of a smaller size. It can be understood that the size of the spacer 60 can be selected as needed to match the vibrating body 14 of different sizes, so that the vibrating body 14 of the motor 10 can be better fixed to the lens carrier 20 by the fixing member 40 to make the vibrating body 14 abut. The relative positions of the shrapnel 44 and the recess 27 remain unchanged.

When the stator 12 of the motor 10 is energized, the vibrating body 14 is vibrated in the axial direction thereof so that the length of the vibrating body 14 is first lengthened and then shortened. When the length of the vibrating body 14 of the motor 10 is lengthened in the axial direction, the frictional force between the resisting elastic piece 44 and the vibrating body 14 is ensured to be smaller than the maximum static friction between the resisting elastic piece 44 and the vibrating body 14, so that the vibrating body 14 is provided. The position of the resisting piece 44 and the groove 27 is always kept constant, so that the fixing member 40 pushes the lens carrier 20 to move linearly along the guiding rod 30 to drive the lens received in the receiving portion 22 to move along the guiding rod 30. . When the length of the vibrating body 14 of the motor 10 is shortened in the axial direction, it is ensured that the frictional force between the resisting elastic piece 44 and the vibrating body 14 is smaller than the maximum static friction between the resisting elastic piece 44 and the vibrating body 14 so that the vibrating body 14 The position of the resisting piece 44 and the groove 27 is always kept unchanged, so that the fixing member 40 is brought back to the lens carrier 20 to linearly move along the axial direction of the guiding rod 30 to drive the lens received in the receiving portion 22 along the guiding rod 30. Move to zoom.

Please refer to FIG. 3, which is a zoom device 200 according to a second embodiment of the present invention. The zoom device 200 differs from the first embodiment in the structure of the fixture and the lens carrier. In the embodiment, the zoom device 200 includes A lens carrier 50 and a fixing member 70.

In the embodiment, the lens carrier 50 includes a connecting portion 54 , and the connecting portion 54 defines a recess 57 . The groove 57 extends through the opposite side walls 56a, 56b of the connecting portion 54. The lens carrier 50 is different from the lens carrier 20 of the first embodiment in that the opposite side walls 56a, 56b of the connecting portion 54 of the lens carrier 50 respectively define a first screw hole 59 (only one is shown in FIG. Screw hole 59).

The fixing member 70 includes a body 72 and a resisting elastic piece 74. The fixing member 70 further includes two clamping portions 76. Each clamping portion 76 is adjacent to the resisting elastic piece 76 on the main body 72 and opposite sides thereof extend in the same direction as the resisting elastic piece 76, and each clamping portion 76 is generally perpendicular to body 72.

The two clamping portions 76 of the fixing member 70 are fixed to the opposite side walls 56a, 56b of the connecting portion 54 of the lens carrier 50. In this embodiment, each of the clamping portions 76 of the fixing member 70 defines a second screw hole 79 (only one second screw hole 79 is shown in FIG. 3).

The fixing member 70 fixes the two clamping portions 76 to the connecting portion 54 of the lens carrier 50 by two screws 78, so that when the length of the vibrating body 14 of the motor 10 is changed, the lens carrier is driven by the fixing member 70. 50 moves linearly along the guide bar 30 to move the lens received in the receiving portion 52 together to zoom.

Please refer to FIG. 4 , which is a zoom device 300 according to a third embodiment of the present invention, which is different from the zoom device 200 of the second embodiment in that the fixing member and the lens carrier are combined in different manners. In the embodiment, the zoom device 300 includes a lens carrier 80 and a fixing member 90.

In this embodiment, the lens carrier 80 includes a connecting portion 84, and the lens carrier 80 is different from the lens carrier 50 of the second embodiment in that the opposite side walls 86a, 86b of the connecting portion 84 of the lens carrier 80 respectively include a bump 88 (only one bump 88 is shown in FIG. 4).

The fixing member 90 includes two clamping portions 96. The fixing member 90 is different from the fixing member 70 of the second embodiment in that each clamping portion 96 of the fixing member 90 defines a corresponding one of the protrusions 88. Through hole 98. In this embodiment, each of the through holes 98 is fixed to each of the bumps 88 by a snapping manner.

The fixing member 90 is engaged with the protrusion 88 by the through hole 98 to fix the fixing member 90 to the lens carrier 80, so that when the length of the vibrating body 14 of the motor 10 is changed, the lens carrier 80 is driven by the fixing member 90. The guide rod 30 moves linearly to move the lens received in the receiving portion 82 together to zoom.

It can be understood that the zoom device can be provided with a plurality of clamping devices to complete the zooming as needed.

In the above embodiment, each zoom device fixes the motor to the lens carrier by the fixing member of the clamping device. The motor and the lens carrier are separately designed, the structure is simple, the accuracy is high, and when the motor or the lens carrier is damaged, it can be replaced as needed, and the cost is low.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the present invention are intended to be included in the scope of the following claims.

100, 200, 300‧‧‧ zoom device

110‧‧‧Clamping device

10‧‧‧ motor

12‧‧‧ Stator

14‧‧‧ vibrating body

20, 50, 80‧‧‧ lens carriers

22, 52, 82‧‧ ‧ Housing Department

24, 54‧‧‧ Connections

25‧‧‧Mobile Department

27, 57‧‧‧ grooves

28‧‧‧ end face

29, 79‧‧‧ second screw hole

30‧‧‧guides

40, 70, 90‧‧‧ fixing parts

42, 72‧‧‧ subjects

44, 74‧‧‧Resist the shrapnel

45, 78‧‧‧ screws

49, 59‧‧‧ first screw hole

60‧‧‧shims

76, 96‧‧ ‧ gripping department

88‧‧‧Bumps

98‧‧‧through hole

56a, 56b, 86a, 86b‧‧‧ side walls

1 is a schematic view showing the assembly of a zoom device according to a first embodiment of the present invention; .

2 is an exploded perspective view of a zoom device according to a first embodiment of the present invention.

3 is an exploded perspective view of a zoom device according to a second embodiment of the present invention.

4 is an exploded perspective view of a zoom device according to a third embodiment of the present invention.

100‧‧‧ Zoom device

110‧‧‧Clamping device

10‧‧‧ motor

12‧‧‧ Stator

14‧‧‧ vibrating body

20‧‧‧Lens Carrier

22‧‧‧ Housing Department

24‧‧‧Connecting Department

25‧‧‧Mobile Department

28‧‧‧ end face

30‧‧‧guides

42‧‧‧ Subject

44‧‧‧Resist the shrapnel

45‧‧‧ screws

60‧‧‧shims

Claims (8)

A clamping device for holding a motor, the motor having a vibrating body, the vibrating body being vibrating along an axial direction thereof, the clamping device comprising a lens carrier, the lens carrier comprising a The accommodating portion and the connecting portion connected to the accommodating portion are improved in that the connecting portion of the lens carrier defines a recess, and the clamping device further includes a fixing member, the fixing member includes a main body, An abutting elastic piece extending from the main body and two clamping portions, the main body being fixed to the connecting portion, the resisting elastic piece and the groove correspondingly forming a receiving space for receiving the motor a vibrating body, each of the clamping portions extending on the opposite side of the main body adjacent to the resisting elastic piece in the same direction as the resisting elastic piece, and each of the clamping portions is perpendicular to the a body, two clamping ends of the fixing member are fixed to opposite side walls of the connecting portion of the lens carrier, and the groove penetrates the opposite side walls, and the vibrating body and the groove And the relative position of the resisting shrapnel remains unchanged. The clamping device of claim 1, wherein the connecting portion has an end surface, the groove is disposed between the end surface and the receiving portion, and the main body and the connecting portion are The end faces are fixed by screwing. The clamping device of claim 1, wherein the two clamping ends of the fixing member are screwed to opposite side walls of the connecting portion of the lens carrier. The clamping device of claim 1, wherein the two clamping portions respectively define a through hole, and the opposite side walls of the connecting portion of the lens carrier respectively comprise a through hole Corresponding bumps, each of the through holes is fixedly engaged with each of the bumps. The clamping device of claim 1, wherein the clamping device further comprises a spacer, the spacer corresponding to a groove of the connecting portion of the lens carrier. The holding device of claim 5, wherein the groove of the lens carrier has an "L" shape or a "V" shape, and the shape of the gasket and the shape of the groove Corresponding to an "L" shape or a "V" shape. The holding device of claim 1, wherein the fixing member is made of an elastic material. A zoom device comprising at least one clamping device according to any one of claims 1 to 7, at least one motor corresponding to the clamping device, and a guide rod, the lens of the clamping device The carrier is movably connected to the guide rod, the motor has a vibrating body, the vibrating body can vibrate along the axial direction thereof, and the vibrating body of the motor is received by the fixing member of the clamping device to resist the shrapnel The accommodating space formed by the groove of the connecting portion of the lens carrier, and the relative positions of the vibrating body, the groove and the resisting elastic piece are always maintained.