Drive mechanism

Abstract

The utility model provides a driving mechanism. The driving mechanism comprises a fixed assembly, a movable component and a driving assembly. The movable component can move relative to the fixed assembly. The driving assembly is configured to drive the movable component to move relative to the fixed assembly.

Description

Technical Field

[0001] The utility model relates to a driving mechanism, in particular to a driving mechanism with a piezoelectric element. Background Art

[0002] With the development of technology, many electronic devices (such as smart phones or digital cameras) now have components such as motors to drive lenses or other objects. However, the displacement accuracy of known motors, such as stepper motors or voice coil motors, cannot meet certain specific requirements.

[0003] Therefore, how to design a driving mechanism that can improve displacement accuracy and achieve miniaturization is a topic worth exploring and solving today. Utility Model Content

[0004] The purpose of the present invention is to provide a driving mechanism to solve at least one of the above problems.

[0005] The utility model provides a driving mechanism, comprising a fixed component, a movable component and a driving component. The movable component can move relative to the fixed component. The driving component is configured to drive the movable component to move relative to the fixed component.

[0006] According to some embodiments of the utility model, the driving assembly includes a driving body and a contact member. The driving body has a flexible structure. The driving body includes a fixed portion and a movable portion. The movable portion can move relative to the fixed portion. The contact member is disposed on the movable portion. The contact member has a contact portion configured to contact and apply a driving force to the movable component. The driving assembly also includes a driving portion configured to drive the movable portion and the contact member to move relative to the fixed portion. The movable portion and the driving portion are arranged along a first axial direction.

[0007] According to some embodiments of the utility model, the driving body also includes a first flexible portion and a first connecting portion. The movable portion is movably connected to the fixed portion via the first flexible portion. The first connecting portion is connected to the driving portion, and the first connecting portion has a first connecting surface, which faces the driving portion. The driving portion has a first surface, which faces the first connecting portion and is connected to the first connecting surface. The driving body also includes a second connecting portion, which is connected to the driving portion, and the second connecting portion has a second connecting surface, which faces the driving portion. The driving portion has a second surface, which faces the second connecting portion and is connected to the second connecting surface. The first connecting surface is perpendicular to the first axial direction. The first flexible portion has a first flexible portion surface, which is perpendicular to a second axial direction. When observed along the second axial direction, the first flexible portion and the driving portion do not overlap. The first axial direction and the second axial direction are perpendicular to each other. The first flexible portion and the driving portion are arranged along a third axial direction. The third axial direction, the first axial direction and the second axial direction are perpendicular to each other.

[0008] According to some embodiments of the utility model, the first flexible portion also has a second flexible portion surface. The first flexible portion surface and the second flexible portion surface face opposite directions. The first flexible portion also has a first groove and a second groove. The first groove is formed on the first flexible portion surface. The second groove is formed on the second flexible portion surface. When observed along the second axial direction, the first groove overlaps at least a portion of the second groove. The depth of the first groove is different from the depth of the second groove. The first flexible portion also has a third flexible portion surface and a fourth flexible portion surface. The third flexible portion surface is perpendicular to the first flexible portion surface. The fourth flexible portion surface faces opposite directions from the third flexible portion surface. The first flexible portion also has a third groove and a fourth groove. The third groove is formed on the third flexible portion surface. The fourth groove is formed on the fourth flexible portion surface. When observed along the third axial direction, the third groove overlaps at least a portion of the fourth groove. The depth of the third groove is different from the depth of the fourth groove. The driving portion is configured to drive the movable portion to move in a first dimension, and the movement in the first dimension at least includes movement along the second axial direction. When the driving part drives the movable part to move, the motion trajectory of the contact part is an arc trajectory. The arc trajectory has a closed structure. The arc trajectory has a center. The arc trajectory is defined by a central axis, which passes through the center. The central axis is parallel to the third axial direction. The central axis is perpendicular to the second axial direction. When observed along the first axial direction or the third axial direction, the central axis does not pass through the center of the driving part.

[0009] According to some embodiments of the utility model, the driving mechanism further includes a positioning assembly configured to be fixed to the driving assembly. The positioning assembly includes a positioning element and an elastic element. The positioning element has a long strip structure. The positioning element passes through a portion of the fixing assembly and the fixing portion of the driving assembly. The elastic element is sleeved on the positioning element. The elastic element is disposed between the driving assembly and the fixing assembly. The elastic element is configured to apply a stabilizing force to the driving assembly. The direction of the stabilizing force is not perpendicular to the direction of the driving force. The direction of the stabilizing force is not parallel to the surface of the first flexible portion.

[0010] According to some embodiments of the utility model, the fixed assembly includes an outer cover and a base. The outer cover is fixedly connected to the base along the second axial direction. When observed along the first axial direction, the outer cover and the base surround the driving assembly. The outer cover of the fixed assembly has an avoidance portion corresponding to the surface of the second flexible portion. The avoidance portion has an avoidance portion surface facing the surface of the second flexible portion. The driving mechanism also includes a limiting element. The limiting element is arranged on the fixed assembly and has a limiting surface facing the driving assembly. The limiting surface is parallel to the second axial direction and perpendicular to the first axial direction. The limiting surface contacts a fixed surface of the driving assembly.

[0011] According to some embodiments of the utility model, the positioning element has a first screw thread structure. The driving body of the driving assembly has a second screw thread structure corresponding to the first screw thread structure. The first screw thread structure is configured to be screwed into the second screw thread structure so that the fixing portion of the driving body is located in a fixed position. When observed along the third axial direction, the positioning element extends along a first extension direction. When observed along the third axial direction, the driving body extends along a second extension direction. The first extension direction is not perpendicular to the second extension direction.

[0012] According to some embodiments of the utility model, the positioning element has a limiting portion configured to limit the drive assembly to a fixed position. When the drive assembly is in the fixed position, the drive assembly contacts the limiting portion. The limiting portion has a limiting surface facing the drive assembly. When viewed along a direction perpendicular to the second axial direction, at least a portion of the drive assembly is located between the limiting portion and the elastic element. The avoidance portion surface of the avoidance portion is neither perpendicular nor parallel to the surface of the first flexible portion. The drive assembly has a first opening, and at least a portion of the positioning element is located in the first opening. The positioning element defines a first extension direction. The positioning element extends along the first extension direction. When viewed along the first extension direction, the area of ​​the first opening is greater than the area of ​​a first cross-section of the positioning element. The first extension direction is perpendicular to the first cross-section. The area of ​​the first opening is at least 5% greater than the area of ​​the first cross-section. When viewed along the first extension direction, the first opening has a long strip structure, and the first opening defines a stretching direction. When viewed along the first extension direction, a line connecting the center of the positioning element and the center of the contact member is parallel to the stretching direction.

[0013] According to some embodiments of the utility model, when the driving component receives a first control signal, the driving component drives the contact member to move in a first dimension. When the driving component receives a second control signal, the driving component drives the contact member to move in a second dimension. The second dimension is opposite to the first dimension. The first control signal and the second control signal have periodic characteristics. The frequency of the first control signal is the same as the frequency of the second control signal.

[0014] According to some embodiments of the utility model, when the driving component receives a first control signal, the driving component drives the contact member to move in a first dimension. When the driving component receives a second control signal, the driving component drives the contact member to move in a second dimension. The second dimension is opposite to the first dimension. The first control signal and the second control signal have periodic characteristics. The frequency of the first control signal is different from the frequency of the second control signal.

[0015] The utility model provides a driving mechanism, including a fixed component, a movable component and a driving component. The driving component is configured to drive the movable component to move relative to the fixed component. The driving component may include a driving body and a driving part. The driving part may deform after receiving an external control signal to push the driving body to generate deflection, thereby driving a contact member located on the movable part to move in a first dimension or a second dimension. When the contact member moves, the contact member repeatedly contacts the movable component, thereby driving the movable component to move, for example, along a first direction or a second direction.

[0016] In some embodiments, when the driving unit receives a first control signal, the driving component drives the contact member to move clockwise along an arc track, and when the driving unit of the driving component receives a second control signal, the driving component drives the contact member to move counterclockwise along the arc track. Based on such a design, the driving member can quickly drive the movable member to move back and forth along the first axis, and the displacement accuracy can be greatly improved compared to traditional motors.

[0017] In addition, since the driving mechanism of the utility model does not require traditional coils, magnets and additional pushing elements, the overall volume of the driving mechanism can be effectively reduced to achieve the purpose of miniaturization. And since the driving part is a piezoelectric element, the driving force that can be provided is far greater than that of a traditional coil motor, thereby being able to push larger and heavier objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention can be clearly understood through the detailed description below and the accompanying drawings. It is emphasized that, in accordance with standard practice in the industry, various features are not drawn to scale and are only used for illustrative purposes. In fact, in order to enable clear description, the size of various features may be arbitrarily enlarged or reduced.

[0019] Figure 1 It is a three-dimensional diagram of a driving mechanism according to an embodiment of the utility model.

[0020] Figure 2 It is an exploded view of a driving mechanism according to an embodiment of the utility model.

[0021] Figure 3 The driving mechanism according to one embodiment of the utility model is along Figure 1 Section view of midline segment AA.

[0022] Figure 4 It is an exploded view of a driving assembly according to an embodiment of the utility model.

[0023] Figure 5 It is a top view of a driving assembly according to an embodiment of the utility model.

[0024] Figure 6 It is a side view of a driving assembly according to an embodiment of the utility model.

[0025] Figure 7 It is a rear view of a driving assembly according to an embodiment of the utility model.

[0026] Figures 8 to 10 The figure is a side view of a driving body that is deformed to drive a contact member to move in different positions according to an embodiment of the present invention.

[0027] Fig.11 It is a schematic diagram of a driving assembly driving a movable component to move along a first direction according to an embodiment of the utility model.

[0028] Fig.12 It is a schematic diagram of a driving assembly driving a movable component to move along a second direction according to an embodiment of the utility model.

[0029] Fig.13 It is a cross-sectional view of a driving mechanism according to another embodiment of the utility model.

[0030] Fig.14 It is a top view of a driving assembly according to another embodiment of the utility model.

[0031] The reference numerals are as follows:

[0032] 100: Driving mechanism

[0033] 100A: Driving mechanism

[0034] 102: Outer cover

[0035] 102H: Opening

[0036] 103:Ball

[0037] 104: Drive body

[0038] 1041: Activities Department

[0039] 1042:Fixed part

[0040] 1043: first flexible portion

[0041] 1044: Second flexible portion

[0042] 1045: first connection part

[0043] 1046: Second connection part

[0044] 1047: First connection surface

[0045] 1048: Second connection surface

[0046] 104B:Fixed surface

[0047] 104H: First opening

[0048] 105: Contact

[0049] 1051:Contact Department

[0050] 105C: Center

[0051] 106: Positioning element

[0052] 1061: Restriction Department

[0053] 1063: Restricted Surface

[0054] 106A: Positioning element

[0055] 106C: Center

[0056] 108:Active Components

[0057] 110: Elastic element

[0058] 112: Base

[0059] 116: Driving unit

[0060] 1161: first surface

[0061] 1162: Second surface

[0062] 116C: Center

[0063] 120: Limiting element

[0064] 1201: Limiting surface

[0065] AP1: Avoidance Department

[0066] AP11: Avoidance surface

[0067] AX1: First axis

[0068] AX2: Second axis

[0069] AX3: The third axis

[0070] CC: Center

[0071] CF1: First section

[0072] CL1: Connection

[0073] CS1: First control signal

[0074] CS2: Second control signal

[0075] CX:Center axis

[0076] D1: First direction

[0077] D2: Second direction

[0078] DA: Drive assembly

[0079] DF1: Driving force

[0080] ED1: First extension direction

[0081] ED2: Second extension direction

[0082] FA:Fixed components

[0083] FS1: First flexible surface

[0084] FS2: Second flexible surface

[0085] FS3: Third flexible surface

[0086] FS4: Fourth flexible surface

[0087] FS5: Fifth flexible surface

[0088] NT1: First groove

[0089] NT2: Second groove

[0090] NT3: The third groove

[0091] NT4: The fourth groove

[0092] NT5: Fifth groove

[0093] NT6: Sixth groove

[0094] PA: Positioning Components

[0095] WR1: Wire

[0096] WR2: Wire

[0097] SC1: First thread structure

[0098] SC2: Second thread structure

[0099] SD1: stretching direction

[0100] SF1: Stability

[0101] TR: Arc trajectory

[0102] X: X-axis

[0103] Y: Y axis

[0104] Z: Z axis DETAILED DESCRIPTION

[0105] Many different implementation methods or examples are disclosed below to implement the different features provided. The following describes specific embodiments of the components and their arrangements to illustrate the present invention. Of course, these embodiments are only for illustration and do not limit the scope of the present invention. For example, in the specification, it is mentioned that the first characteristic component is formed on the second characteristic component, which may include an embodiment in which the first characteristic component and the second characteristic component are in direct contact, and may also include an embodiment in which there are other features between the first characteristic component and the second characteristic component. In other words, the first characteristic component and the second characteristic component are not in direct contact.

[0106] In addition, repeated numbers or marks may be used in different embodiments, and these repetitions are only for the purpose of simply and clearly describing the utility model, and do not represent a specific relationship between the different embodiments and / or structures discussed. In addition, in the utility model, forming, connecting and / or coupling to another characteristic component on another characteristic component may include an embodiment in which the characteristic component is formed to be in direct contact, and may also include an embodiment in which an additional characteristic component inserted into the above-mentioned characteristic component can be formed, so that the above-mentioned characteristic component may not be in direct contact. In addition, space-related words may be used, such as "vertical", "above", "up", "below", "bottom" and similar words (such as "downwardly", "upwardly", etc.), these space-related words are for the convenience of describing the relationship between one (some) element or feature and another (some) element or feature in the diagram, and these space-related words are intended to cover different directions of the device including the feature.

[0107] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meanings as those commonly understood by those skilled in the art to which this disclosure belongs. It is understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the background or context of the relevant technology and the present invention, and should not be interpreted in an idealized or overly formal manner unless specifically defined herein.

[0108] Furthermore, the ordinal numbers used in the specification and claims, such as "first", "second", etc., to modify the elements of the claims, do not themselves mean or represent any previous ordinal numbers of the requested elements, nor do they represent the order of one requested element and another requested element, or the order in the manufacturing method. The use of ordinal numbers is only used to clearly distinguish a requested element with a certain name from another requested element with the same name.

[0109] In addition, in some embodiments of the present invention, the terms "joined" and "interconnected" may refer to two structures being in direct contact, or two structures not being in direct contact, with another structure disposed between the two structures, unless otherwise specified. The terms "joined" and "connected" may also include the case where both structures are movable, or both structures are fixed.

[0110] Please refer to Figures 1 to 3 , Figure 1 is a three-dimensional diagram of a driving mechanism 100 according to an embodiment of the present utility model. Figure 2 is an exploded view of a driving mechanism 100 according to an embodiment of the present utility model, and Figure 3 The driving mechanism 100 according to an embodiment of the present invention is Figure 1 The driving mechanism 100 can be, for example, a driving linear motor configured to drive various components to perform linear movement. The driving mechanism 100 can carry components with relatively large weight and can be applied to high-precision instruments such as 3D printers and electron microscopes.

[0111] In this embodiment, the driving mechanism 100 may include a fixed component FA, a movable member 108, and a driving component DA. The movable member 108 may move relative to the fixed component FA. The driving component DA is configured to drive the movable member 108 to move relative to the fixed component FA along a first axial direction AX1 (X axis). Figure 1 As shown, when viewed along the first axial direction AX1 , the driving assembly DA is located between the fixed assembly FA and the movable member 108 .

[0112] In this embodiment, if Figure 2 As shown, the fixing assembly FA may include an outer cover 102 and a base 112, and the outer cover 102 is fixedly connected to the base 112 along a second axis AX2. The outer cover 102 and the base 112 may be made of metal or plastic material, and the two may be screwed or glued, but not limited thereto.

[0113] When viewed along the first axial direction AX1, the outer cover 102 and the base 112 surround the drive assembly DA. Figure 2 As shown, the driving mechanism 100 further includes a plurality of balls 103 disposed between the base 112 and the movable member 108, so that the movable member 108 can move relative to the base 112. It should be noted that the means for the movable member 108 to move relative to the base 112 is not limited to the balls 103 of this embodiment.

[0114] In this embodiment, the driving assembly DA is connected to the outer cover 102. For example, Figure 2 and Figure 3As shown, the driving mechanism 100 further includes a positioning assembly PA, which is configured to be fixed to the driving assembly DA and the outer cover 102. In this embodiment, the positioning assembly PA may include a positioning element 106 and an elastic element 110.

[0115] The positioning element 106 may have a long strip structure. For example, the positioning element 106 may be a screw, but is not limited thereto. The positioning element 106 passes through an opening 102H of the outer cover 102 and a first opening 104H of a fixing portion 1042 of the driving assembly DA to fix the driving assembly DA to the outer cover 102.

[0116] Specifically, if Figure 3 As shown, the positioning element 106 may have a first screw thread structure SC1, and a driving body 104 of the driving assembly DA may have a second screw thread structure SC2 corresponding to the first screw thread structure SC1. The first screw thread structure SC1 is configured to be screwed into the second screw thread structure SC2 so that the fixing portion 1042 of the driving body 104 is located Figure 3 a fixed position.

[0117] When viewed along a third axis AX3 (Y axis), Figure 3 As shown, the positioning element 106 extends along a first extension direction ED1. When viewed along the third axial direction AX3, the driving body 104 extends along a second extension direction ED2. Due to tolerance, when the positioning element 106 fixes the driving body 104 to the outer cover 102, the first extension direction ED1 may not be perpendicular to the second extension direction ED2.

[0118] Furthermore, the elastic element 110 is, for example, a spring, which is sleeved on the positioning element 106, but is not limited thereto. Figure 3 As shown, the elastic element 110 is disposed between the driving body 104 of the driving assembly DA and the outer cover 102 , such that the elastic element 110 is configured to apply a stabilizing force SF1 to the driving body 104 of the driving assembly DA.

[0119] Similarly, due to the aforementioned tolerance, the stabilizing force SF1 may not be parallel or perpendicular to a first flexible portion surface FS1 on the driving body 104 . In other words, the direction of the stabilizing force SF1 may not be perpendicular to the driving body 104 .

[0120] Please refer to Figures 4 to 7 . Figure 4 FIG. 2 is an exploded view of a driving assembly DA according to an embodiment of the present utility model. Figure 5 FIG. 1 is a top view of a driving assembly DA according to an embodiment of the present utility model. Figure 6 is a side view of a drive assembly DA according to an embodiment of the present invention, and Figure 7It is a rear view of a driving assembly DA according to an embodiment of the present utility model.

[0121] The driving assembly DA may include the aforementioned driving body 104 and a contact member 105. The driving body 104 has a flexible structure, and the contact member 105 is fixedly disposed on a movable portion 1041 of the driving body 104. In this embodiment, the driving body 104 may be made of a first metal material. For example, the first metal material may include stainless steel. Furthermore, the contact member 105 may be made of a second metal material, and the second metal material may include tool steel, but the materials of the driving body 104 and the contact member 105 are not limited to this embodiment.

[0122] like Figure 3 and Figure 4 As shown, the contact member 105 may have a semi-cylindrical structure, and the contact member 105 may have a contact portion 1051 configured to contact and apply a driving force DF1 to the movable component 108 .

[0123] The contact portion 1051 is a portion that contacts the movable member 108 ( Figure 4 The direction of the stabilizing force SF1 may not be perpendicular or parallel to the direction of the driving force DF1. Specifically, the driving force DF1 may not be parallel to the Z axis and may change direction as the contact member 105 moves.

[0124] Furthermore, if Figure 4 and Figure 5 As shown, the driving body 104 may include the aforementioned fixed portion 1042 and a movable portion 1041, and the movable portion 1041 is movable relative to the fixed portion 1042. Furthermore, the driving body 104 also includes a first flexible portion 1043, and the movable portion 1041 is movably connected to the fixed portion 1042 via the first flexible portion 1043.

[0125] Similarly, the driving body 104 further includes a second flexible portion 1044, and the movable portion 1041 is movably connected to the fixed portion 1042 via the second flexible portion 1044. Figure 5 As shown, the movable portion 1041 and the fixed portion 1042 are connected between the first flexible portion 1043 and the second flexible portion 1044 .

[0126] Furthermore, the driving assembly DA may further include a driving portion 116 configured to drive the movable portion 1041 and the contact member 105 to move relative to the fixed portion 1042. The movable portion 1041 and the driving portion 116 are arranged along the first axial direction AX1 (X axis). In this embodiment, the driving portion 116 may be a piezoelectric element, such as made of piezoelectric ceramics, but is not limited thereto.

[0127] like Figure 5 As shown, the driving body 104 further includes a first connection portion 1045 connected to the driving portion 116, and the first connection portion 1045 has a first connection surface 1047, which faces the driving portion 116. The driving portion 116 has a first surface 1161, which faces the first connection portion 1045 and is connected to the first connection surface 1047, for example, by elastic glue.

[0128] Similarly, the driving body 104 may further include a second connection portion 1046 connected to the driving portion 116, and the second connection portion 1046 has a second connection surface 1048, which faces the driving portion 116. The driving portion 116 has a second surface 1162, which faces the second connection portion 1046 and is connected to the second connection surface 1048, for example, by elastic glue. The first connection surface 1047 and the second connection surface 1048 are perpendicular to the first axial direction AX1.

[0129] It should be noted that, in this embodiment, the first connection portion 1045 and the first connection surface 1047 are located on the movable portion 1041, and the second connection portion 1046 and the second connection surface 1048 are located on the fixed portion 1042, but it is not limited thereto. In other embodiments, the first connection surface 1047 and the second connection surface 1048 may be located on the inner side surfaces of the first flexible portion 1043 and the second flexible portion 1044, respectively. In other embodiments, the driving portion 116 may be connected between the first flexible portion 1043 and the second flexible portion 1044.

[0130] like Figure 5 As shown, when viewed along the second axial direction AX2 (Z axis), the first flexible portion 1043 and the second flexible portion 1044 do not overlap the driving portion 116, and the first axial direction AX1 and the second axial direction AX2 are perpendicular to each other. Furthermore, the first flexible portion 1043 and the driving portion 116 are arranged along the third axial direction AX3 (Y axis), and the third axial direction AX3, the first axial direction AX1 and the second axial direction AX2 are perpendicular to each other.

[0131] Furthermore, if Figures 5 to 7 As shown, the first flexible portion 1043 may have the aforementioned first flexible portion surface FS1 and a second flexible portion surface FS2, and the first flexible portion surface FS1 and the second flexible portion surface FS2 face opposite directions.

[0132] like Figure 5 and Figure 7 As shown, the first flexible portion 1043 further has a first groove NT1 and a second groove NT2. The first groove NT1 is formed on the first flexible portion surface FS1, and the second groove NT2 is formed on the second flexible portion surface FS2.

[0133] When viewed along the second axial direction AX2, the first groove NT1 overlaps at least a portion of the second groove NT2, and the depth of the first groove NT1 is different from the depth of the second groove NT2. In this embodiment, the depth of the first groove NT1 is greater than the depth of the second groove NT2, but is not limited thereto.

[0134] It should be noted that the second flexible portion 1044 may also have a first groove NT1 and a second groove NT2 and other groove structures, that is, the second flexible portion 1044 and the first flexible portion 1043 are symmetrically arranged (eg Figure 5 Therefore, in the following paragraphs, only the detailed structure of the first flexible portion 1043 will be described.

[0135] Furthermore, if Figure 5 and Figure 6 As shown, the first flexible portion 1043 also has a third flexible portion surface FS3 and a fourth flexible portion surface FS4. The third flexible portion surface FS3 and the fourth flexible portion surface FS4 are perpendicular to the first flexible portion surface FS1, and the fourth flexible portion surface FS4 and the third flexible portion surface FS3 face in opposite directions.

[0136] The first flexible portion 1043 further has two third grooves NT3 and a fourth groove NT4. The third groove NT3 is formed on the third flexible portion surface FS3, and the fourth groove NT4 is formed on the fourth flexible portion surface FS4.

[0137] like Figure 5 and Figure 6 As shown, when viewed along the third axial direction AX3, one of the third grooves NT3 overlaps at least a portion of the fourth groove NT4, and the depth of the third groove NT3 is different from the depth of the fourth groove NT4.

[0138] Similarly, Figure 5 and Figure 6 As shown, the first flexible portion 1043 further has a fifth flexible portion surface FS5, and the fifth flexible portion surface FS5 is perpendicular to the first flexible portion surface FS1.

[0139] The first flexible portion 1043 further has a fifth groove NT5 and a sixth groove NT6. The fifth groove NT5 is formed on the fifth flexible portion surface FS5, and the sixth groove NT6 is formed on the fourth flexible portion surface FS4.

[0140] When viewed along the first axial direction AX1, the fifth groove NT5 overlaps at least a portion of the sixth groove NT6, and the depth of the fifth groove NT5 is different from the depth of the sixth groove NT6.

[0141] Based on the design of these grooves on the first flexible portion 1043 and the second flexible portion 1044, when the driving portion 116 is deformed (expanded or contracted), it will drive the first flexible portion 1043, the second flexible portion 1044 and the movable portion 1041 to bend, so that the movable portion 1041 drives the contact member 105 to move.

[0142] Therefore, the driving part 116 is configured to drive the movable part 1041 and the contact member 105 to move in a first dimension, and the movement in the first dimension includes movement along the first axis AX1 and the second axis AX2. The specific actuation method and movement range will be described in the following paragraphs.

[0143] Please refer to Figure 6 as well as Figures 8 to 10 . Figures 8 to 10 1 is a side view of the drive body 104 deforming to drive the contact member 105 to move in different positions according to an embodiment of the present invention. In this embodiment, the drive unit 116 is configured to drive the contact member 105 to move via the wires WR1 and WR2. Figure 4 ) receives a first control signal CS1 and a second control signal CS2 from an external control circuit to generate deformation. The external control circuit is, for example, a control chip or a control integrated circuit, but is not limited thereto.

[0144] After receiving the control signal, the driving part 116 will deform according to the first control signal CS1 or the second control signal CS2 to push the movable part 1041, so that the first flexible part 1043, the second flexible part 1044 and the movable part 1041 are bent to drive the contact member 105 to move relative to the fixed part 1042. In other words, the fixed part 1042 will not deform.

[0145] The first control signal CS1 and the second control signal CS2 have periodic characteristics, and the frequency of the first control signal CS1 is the same as the frequency of the second control signal CS2. For example, the first control signal CS1 and the second control signal CS2 can be AC ​​square wave signals and have the same frequency, but are not limited thereto. It is worth noting that in this embodiment, the phase difference between the first control signal CS1 and the second control signal CS2 is 180 degrees.

[0146] like Figure 6 , Figures 8 to 10 As shown, when the driving unit 116 receives the first control signal CS1 (for example, the initial phase is 0 degrees), the driving unit 116 will expand first and then contract to drive the movable portion 1041 to deform, so that the contact member 105 is sequentially Figure 6 Rotate to Figure 8 , Fig. 9 and Fig.10 , and then return to Figure 6location.

[0147] That is, when the driving portion 116 drives the movable portion 1041 to move, the contact member 105 rotates clockwise, and the movement trajectory of the contact portion 1051 of the contact member 105 is an arc trajectory TR. Figure 6 As shown, the arc track TR is, for example, an elliptical track. The arc track TR has a closed structure, and the arc track TR has a center CC. Figure 5 and Figure 6 As shown, the arcuate trajectory TR defines a central axis CX, and the central axis CX passes through the center CC.

[0148] like Figure 5 As shown, the central axis CX is parallel to the third axial direction AX3, and the central axis CX is perpendicular to the second axial direction AX2. Figure 6 As shown, when viewed along the first axial direction AX1 or the third axial direction AX3 , the central axis CX does not pass through a center 116C of the driving portion 116 .

[0149] In this embodiment, when the driving unit 116 of the driving component DA receives the first control signal CS1, the driving component DA drives the contact 105 to move in the first dimension. In other words, the movement of the contact 105 in the first dimension is the movement of the contact 105 along Figure 6 The arc trajectory TR in the clockwise movement.

[0150] On the contrary, when the driving unit 116 of the driving component DA receives the second control signal CS2, the driving component DA drives the contact 105 to move in a second dimension, and the second dimension is opposite to the first dimension. In other words, the movement of the second dimension is that the contact 105 moves along Figure 6 The arc trajectory TR moves counterclockwise.

[0151] That is, when the driving unit 116 receives the second control signal CS2 (for example, the initial phase is 180 degrees), the driving unit 116 will first contract and then expand to drive the movable portion 1041 to deform, so that the contact member 105 is sequentially Figure 6 Rotate to Fig.10 , Fig. 9 and Figure 8 , and then return to Figure 6 location.

[0152] In addition, it should be noted that, in this embodiment, the frequency of the first control signal CS1 is the same as the frequency of the second control signal CS2, but is not limited thereto. In other embodiments, the frequency of the first control signal CS1 may be different from the frequency of the second control signal CS2, but the frequency of the first control signal CS1 is the same as the phase of the second control signal CS2.

[0153] For example, when the frequency of the first control signal CS1 is 120 kHz, the contact member 105 is along Figure 6 On the other hand, when the frequency of the second control signal CS2 is 130kHz, the contact member 105 moves along the arc track TR in the clockwise direction. Figure 6 The arc trajectory TR in the figure moves counterclockwise.

[0154] Based on the various configurations of the first control signal CS1 and the second control signal CS2, different means can be used according to different application scenarios to achieve the control of the movement of the contact 105. In other words, such a configuration can increase the flexibility of use and can be based on different use environments or driven components.

[0155] Please refer to Figure 11 to Figure 12 . Fig.11 is a schematic diagram of a driving assembly DA driving a movable member 108 to move along a first direction D1 according to an embodiment of the present invention, and Fig.12 It is a schematic diagram showing that the driving assembly DA drives the movable component 108 to move along a second direction D2 according to an embodiment of the present invention.

[0156] like Fig.11 As shown in FIG. 1 , when the contact member 105 is driven by the movable portion 1041 to rotate clockwise, the contact portion 1051 of the contact member 105 switches between a disengaged state and a contact state. For example, when the contact portion 1051 is located at Fig.11 When the contact portion 1051 is located at the upper portion of the arc track TR, the contact piece 105 is not in contact with the movable member 108 and is in a disengaged state. On the other hand, when the contact portion 1051 is located at the lower portion of the arc track TR, the contact piece 105 is in contact with the movable member 108 and is in a contact state to push the movable member 108.

[0157] like Fig.11 As shown in FIG. 1 , when the contact member 105 rotates clockwise rapidly and repeatedly contacts the movable member 108, the movable member 108 can move along the first direction D1. Fig.12 As shown, when the contact member 105 rotates counterclockwise rapidly and repeatedly contacts the movable member 108 , the movable member 108 can move along the second direction D2 .

[0158] In order to ensure that the movable portion 1041 does not contact the outer cover 102 when moving, in this embodiment, the outer cover 102 of the fixing assembly FA may include an avoidance portion AP1 (top) corresponding to the second flexible portion surface FS2 of the first flexible portion 1043. The avoidance portion AP1 may have an avoidance portion surface AP11 facing the second flexible portion surface FS2.

[0159] In the second axial direction AX2, there is a gap between the avoidance surface AP11 and the second flexible surface FS2, so as to avoid the movable part 1041 from colliding with the avoidance surface AP11 of the outer cover 102 during movement, thereby preventing the movable part 1041 from being damaged.

[0160] Furthermore, in order to ensure that the fixed portion 1042 can be located at the aforementioned fixed position without moving when the movable portion 1041 moves, the driving mechanism 100 may further include a limiting element 120, which is fixedly connected to the outer cover 102 and located inside the outer cover 102. The limiting element 120 is, for example, a cube and can be integrally formed with the outer cover 102, but is not limited thereto.

[0161] like Fig.11 As shown, the limiting element 120 may have a limiting surface 1201 facing the driving assembly DA, which is parallel to the second axis AX2 (Z axis) and perpendicular to the first axis AX1, and directly contacts a fixed surface 104B of the driving body 104 of the driving assembly DA.

[0162] Based on the configuration of the limiting element 120 , the driving assembly DA will be fixed at the aforementioned fixed position and will not rotate around the second axial direction AX2 , so as to ensure that the contact member 105 can effectively drive the movable member 108 to move along the first direction D1 or the second direction D2 .

[0163] Please refer to Fig.13 ,and Fig.13 1 is a cross-sectional view of a driving mechanism 100A according to another embodiment of the present invention. This embodiment is similar to the aforementioned embodiment, except that the positioning element 106A may be a guide rod without threads (such as the first screw thread structure SC1 of the aforementioned embodiment), and the positioning element 106A may have a limiting portion 1061 configured to limit the driving assembly DA to a fixed position.

[0164] When the driving assembly DA is located at the fixed position, the driving body 104 of the driving assembly DA contacts the limiting portion 1061, and the limiting portion 1061 has a limiting surface 1063 facing the driving body 104 of the driving assembly DA. The limiting portion 1061 is, for example, a protrusion of the positioning element 106A, but is not limited thereto. When viewed along a direction perpendicular to the second axial direction AX2, as shown in FIG. Fig.13 As shown, at least a portion of the driving assembly DA is located between the limiting portion 1061 and the elastic element 110 .

[0165] Similar to the aforementioned embodiment, due to tolerance, when the positioning element 106A positions the driving body 104 at a fixed position, the avoidance portion surface AP11 of the avoidance portion AP1 may not be perpendicular or parallel to the first flexible portion surface FS1 or the second flexible portion surface FS2 .

[0166] For example, if Fig.13 As shown, the driving body 104 of this embodiment may make a pitch down motion compared to the outer cover 102. That is, the movable portion 1041 and the fixed portion 1042 are not completely on the same horizontal plane (such as the XY plane), and the angle between the movable portion 1041 or the fixed portion 1042 and the horizontal plane is less than 5 degrees.

[0167] Please refer to Fig.13 and Fig.14 . Fig.14 FIG. 2 is a top view of a drive assembly DA according to another embodiment of the present invention. Fig.14 As shown, the driving body 104 of the driving assembly DA has a first opening 104H, and at least a portion of the positioning element 106A is located in the first opening 104H.

[0168] like Fig.13 As shown, similarly, the positioning element 106A may be defined with a first extension direction ED1 (eg, parallel to the Z axis), and the positioning element 106A extends along the first extension direction ED1. Fig.14 As shown, when viewed along the first extension direction ED1, the area of ​​the first opening 104H is larger than the area of ​​a first cross section CF1 of the positioning element 106. For example, the area of ​​the first opening 104H is at least 5% larger than the area of ​​the first cross section CF1. The first extension direction ED1 is perpendicular to the first cross section CF1.

[0169] When viewed along the first extension direction ED1, the first opening 104H has a long strip structure and defines a stretching direction SD1. When viewed along the first extension direction ED1, a line CL1 connecting a center 106C of the positioning element 106A and a center 105C of the contact portion 1051 is parallel to the stretching direction SD1.

[0170] That is, in this embodiment, the first opening 104H may have an ellipse as its outline, and the stretching direction SD1 overlaps the major axis of the ellipse. Based on such a design, the problem of being unable to install the positioning element 106A in the first opening 104H due to tolerance can be avoided.

[0171] In summary, the utility model provides a driving mechanism 100, including a fixed component FA, a movable component 108 and a driving component DA. The driving component DA is configured to drive the movable component 108 to move relative to the fixed component FA. The driving component DA may include a driving body 104 and a driving portion 116. The driving portion 116 may be deformed after receiving an external control signal to push the driving body 104 to generate deflection, thereby driving the contact member 105 located on the movable portion 1041 to move in the first dimension or the second dimension. When the contact member 105 moves, the contact member 105 will repeatedly contact the movable component 108, thereby driving the movable component 108 to move, for example, along the first direction D1 or the second direction D2.

[0172] In some embodiments, when the driving unit 116 receives the first control signal CS1, the driving assembly DA drives the contact member 105 to move clockwise along an arc track TR, and when the driving unit 116 of the driving assembly DA receives the second control signal CS2, the driving assembly DA drives the contact member 105 to move counterclockwise along the arc track TR. Based on such a design, the driving member 105 can quickly drive the movable member 108 to move back and forth along the first axial direction AX1, and the displacement accuracy can be greatly improved compared to traditional motors.

[0173] In addition, since the driving mechanism of the present invention does not require traditional coils, magnets, and additional pushing elements, the overall volume of the driving mechanism 100 can be effectively reduced to achieve the purpose of miniaturization. Moreover, since the driving part 116 is a piezoelectric element, the driving force that can be provided is far greater than that of a traditional coil motor, thereby being able to push larger and heavier objects.

[0174] Although the embodiments and advantages of the utility model have been disclosed as above, it should be understood that those skilled in the art may make changes, substitutions and modifications without departing from the spirit and scope of the utility model. In addition, the scope of protection of the utility model is not limited to the processes, machines, manufactures, material compositions, devices, methods and steps in the specific embodiments described in the specification. Any technician in the relevant technical field can understand the current or future developed processes, machines, manufactures, material compositions, devices, methods and steps from the disclosure of the utility model. As long as they can implement roughly the same functions or obtain roughly the same results in the embodiments described herein, they can be used according to the utility model. Therefore, the scope of protection of the utility model includes the above-mentioned processes, machines, manufactures, material compositions, devices, methods and steps. In addition, each claim constitutes an individual embodiment, and the scope of protection of the utility model also includes the combination of each claim and embodiment.

Claims

1. A driving mechanism, characterized in that: include: a fixing component; a movable component, movable relative to the fixed component; as well as a driving assembly configured to drive the movable component to move relative to the fixed assembly; Wherein, the driving assembly includes a driving body and a contact member; The driving body has a flexible structure; The driving body includes a fixed part and a movable part; The movable part can move relative to the fixed part; The contact piece is disposed on the movable portion; The contact piece has a contact portion configured to contact and apply a driving force to the movable component; The driving assembly further includes a driving portion configured to drive the movable portion and the contact member to move relative to the fixed portion, so as to drive the movable member to move relative to the fixed assembly along a first axial direction.

2. The driving mechanism according to claim 1, characterized in that: The movable portion and the driving portion are arranged along the first axial direction.

3. The driving mechanism according to claim 2, characterized in that: The driving body also includes a first flexible portion and a first connecting portion; The movable portion is movably connected to the fixed portion via the first flexible portion; The first connecting portion is connected to the driving portion, and the first connecting portion has a first connecting surface facing the driving portion; The driving portion has a first surface facing the first connecting portion and connected to the first connecting surface; The driving body further includes a second connecting portion connected to the driving portion, and the second connecting portion has a second connecting surface facing the driving portion; The driving portion has a second surface facing the second connecting portion and connected to the second connecting surface; The first connecting surface is perpendicular to the first axial direction; The first flexible portion has a first flexible portion surface perpendicular to a second axial direction; When viewed along the second axial direction, the first flexible portion and the driving portion do not overlap; The first axial direction and the second axial direction are perpendicular to each other; The first flexible portion and the driving portion are arranged along a third axial direction; The third axial direction, the first axial direction and the second axial direction are perpendicular to each other.

4. The driving mechanism according to claim 3, characterized in that: The first flexible portion also has a second flexible portion surface; The first flexible portion surface and the second flexible portion surface face opposite directions; The first flexible portion also has a first groove and a second groove; The first groove is formed on the surface of the first flexible portion; The second groove is formed on the surface of the second flexible portion; When viewed along the second axial direction, the first groove overlaps at least a portion of the second groove; The depth of the first groove is different from the depth of the second groove; The first flexible portion also has a third flexible portion surface and a fourth flexible portion surface; The surface of the third flexible portion is perpendicular to the surface of the first flexible portion; The surface of the fourth flexible portion faces opposite directions to the surface of the third flexible portion; The first flexible portion also has a third groove and a fourth groove; The third groove is formed on the surface of the third flexible portion; The fourth groove is formed on the surface of the fourth flexible portion; When viewed along the third axial direction, the third groove overlaps at least a portion of the fourth groove; The depth of the third groove is different from the depth of the fourth groove; The driving portion is configured to drive the movable portion to move in a first dimension, and the movement in the first dimension at least includes movement along the second axial direction; When the driving part drives the movable part to move, the movement trajectory of the contact part is an arc trajectory; The arc-shaped track has a closed structure; The arc-shaped trajectory has a center; The arcuate trajectory is defined with a central axis passing through the center; The central axis is parallel to the third axial direction; The central axis is perpendicular to the second axial direction; When viewed along the first axial direction or the third axial direction, the central axis does not pass through the center of the driving portion.

5. The driving mechanism according to claim 4, characterized in that: The driving mechanism further includes a positioning assembly configured to be fixed to the driving assembly; The positioning assembly includes a positioning element and an elastic element; The positioning element has a long strip structure; The positioning element passes through a portion of the fixing assembly and the fixing portion of the driving assembly; The elastic element is sleeved on the positioning element; The elastic element is disposed between the driving component and the fixing component; The elastic element is configured to apply a stabilizing force to the drive assembly; The direction of the stabilizing force is not perpendicular to the direction of the driving force; The direction of the stabilizing force is not parallel to the surface of the first flexible portion.

6. The driving mechanism according to claim 5, characterized in that: The fixing assembly includes an outer cover and a base; The outer cover is fixedly connected to the base along the second axial direction; When viewed along the first axial direction, the outer cover and the base surround the drive assembly; The outer cover of the fixing assembly has an avoidance portion corresponding to the surface of the second flexible portion; The avoidance portion has an avoidance portion surface facing the second flexible portion surface; The driving mechanism also includes a limiting element; The limiting element is disposed on the fixing assembly and has a limiting surface facing the driving assembly; The limiting surface is parallel to the second axial direction and perpendicular to the first axial direction; The limiting surface contacts a fixing surface of the driving component.

7. The driving mechanism according to claim 6, characterized in that: The positioning element has a first screw thread structure; The driving body of the driving assembly has a second screw thread structure corresponding to the first screw thread structure; The first screw thread structure is configured to be screwed into the second screw thread structure so that the fixing portion of the driving body is located at a fixed position; When viewed along the third axial direction, the positioning element extends along a first extension direction; When viewed along the third axial direction, the driving body extends along a second extension direction; The first extending direction is not perpendicular to the second extending direction.

8. The driving mechanism according to claim 6, characterized in that: The positioning element has a limiting portion configured to limit the driving assembly to a fixed position; When the driving assembly is located at the fixed position, the driving assembly contacts the limiting portion; The limiting portion has a limiting surface facing the driving component; When viewed along a direction perpendicular to the second axial direction, at least a portion of the drive assembly is located between the limiting portion and the elastic element; The surface of the avoiding portion of the avoiding portion is neither perpendicular nor parallel to the surface of the first flexible portion; The drive assembly has a first opening, and at least a portion of the positioning element is located in the first opening; The positioning element is defined with a first extension direction; The positioning element extends along the first extension direction; When viewed along the first extension direction, the area of ​​the first opening is larger than the area of ​​a first cross section of the positioning element; The first extension direction is perpendicular to the first cross section; The area of ​​the first opening is at least 5% greater than the area of ​​the first cross section; When viewed along the first extension direction, the first opening has a long strip structure, and the first opening is defined with a stretching direction; When viewed along the first extending direction, a line connecting the center of the positioning element and the center of the contact piece is parallel to the stretching direction.

9. The driving mechanism according to claim 4, characterized in that: When the driving component receives a first control signal, the driving component drives the contact member to move in the first dimension; When the driving component receives a second control signal, the driving component drives the contact member to move in a second dimension; The second dimension is opposite to the first dimension; The first control signal and the second control signal have a periodic characteristic; The frequency of the first control signal is the same as the frequency of the second control signal.

10. The driving mechanism according to claim 4, characterized in that: When the driving component receives a first control signal, the driving component drives the contact member to move in the first dimension; When the driving component receives a second control signal, the driving component drives the contact member to move in a second dimension; The second dimension is opposite to the first dimension; The first control signal and the second control signal have a periodic characteristic; The frequency of the first control signal is different from the frequency of the second control signal.

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