JP5193741B2 - Imaging lens unit - Google Patents

Description

  The present invention relates to an imaging lens unit in an optical system device, and more particularly to an imaging lens unit that automates focus adjustment incorporated in a mobile phone or the like having a camera function.

  In recent years, cameras equipped with an autofocus function for automatically adjusting the focus of a lens unit are becoming popular as cameras mounted on mobile phones. As a camera having such an autofocus function, for example, Patent Document 1 discloses an optical element for forming an optical image of a subject, and an optical element for guiding and moving the optical element in a predetermined direction. A support mechanism and first and second polymer actuators for moving the optical element, and forming a polymer part that deforms in response to application of voltage to the first and second polymer actuators; 2. Description of the Related Art There are known an optical device and a digital camera that automate the focus adjustment of a lens unit by moving an optical element by deformation of the polymer portion by applying a voltage.

  The autofocus function in the digital camera employs a structure that uses two polymer actuators to move the optical lens and positions the lens group when the polymer actuator is bent. For this reason, when the polymer actuator is bent, positioning means for the lens unit is required, and since two polymer actuators are used, the number of parts is large. For this reason, the assembling work takes time and, for example, when it is assembled in a mobile phone, it is disadvantageous for miniaturization. On the other hand, an imaging lens unit used in a camera incorporated in a mobile phone is inevitably required to be small and thin. In order to reduce the size and thickness required for an imaging lens unit having an autofocus function incorporated in such a cellular phone, the applicant of the present application can freely move the lens barrel in the optical axis direction. A holder held by the holder, a support frame of the holder, a polymer actuator interposed between the support frame and the holder, and a plurality of the polymer actuators that are displaced in response to application of a voltage from a terminal. An imaging lens unit that includes a displacement portion, and a plurality of displacement portions formed on the polymer actuator are engaged with engagement grooves formed on an outer peripheral surface of the lens barrel, and the lens unit is directly driven by the polymer actuator. The application has already been filed in Japanese Patent Application No. 2007-338895. This imaging lens unit forms a guide rib on the holder as a guide mechanism for guiding the lens barrel along the holder when moving the lens unit in the optical axis direction in conjunction with the displacement of the polymer actuator for autofocusing. A guide groove is formed on the outer peripheral surface of the lens barrel, and the lens barrel is slidably guided along the guide rib when the lens unit is moved in the optical axis direction by displacement of the polymer actuator.

JP 2006-301203 A

  An imaging lens unit that auto-focuses by moving a lens barrel incorporating this type of lens unit in the optical axis direction requires a guide mechanism that moves the lens unit in the optical axis direction. The guide groove is integrally formed with the synthetic resin holder and the lens barrel, and the guide rib and the guide groove are fitted so that the lens unit does not rattle when the lens unit is moved in the optical axis direction. For this reason, when the lens unit is moved in the optical axis direction, the guide rib and the guide groove are rubbed, and the fitting between the guide rib and the guide groove tends to be loose during long-term use. For this reason, the clearance gap between a guide rib and a guide groove spreads, and a rattle arises, and it becomes difficult to guide a lens unit stably. Further, since the guide rib and the guide groove are fitted between the synthetic resins, when the guide rib and the guide groove are rubbed, wear powder is generated, and there is a risk that the wear powder enters the lens unit.

  The present invention has been made in view of the above-described problems, and can improve the wear resistance of the guide mechanism to stably guide the lens unit and prevent generation of wear powder. The purpose is to provide units.

The imaging lens unit according to claim 1 includes a lens unit incorporated in a lens barrel, a holder that holds the lens barrel so as to be movable in an optical axis direction, a support frame of the holder, and the support frame and the holder. and a polymer actuator that is pinched by the pair of terminals between, the polymer actuator forms a displacement of the multiple you displaced in accordance with application of a voltage from said terminal, said barrel of the optical axis direction rear surface side is fixed to the lens barrel and a plurality of displacement portions engageable with the receiving member of the polymer actuator, in response to said application of a voltage from the pair of terminals An imaging lens unit configured to displace a plurality of displacement portions and move the lens unit in the optical axis direction according to the displacement amount of the displacement portions to automate focusing with a subject, and Multiple moths Fixing the Dopin, to form a notch in the terminal and the polymer actuator in response to the guide pin, the holder forms a positioning hole, the plurality of guide pins in the terminal and the polymer actuator The guide tube is disposed in the formed notch, and the lens barrel is provided with a guide groove for guiding the guide pin, and the guide tube and the guide pin are engaged with each other so that the lens barrel is in the optical axis direction with respect to the support frame. And at least one of the guide pin and the guide groove is formed of a material having excellent wear resistance.

  According to the configuration of the first aspect, when a voltage is applied from the terminal to the polymer actuator, the displacement portion of the polymer actuator is bent, and the lens barrel in which the lens unit is incorporated by the engagement between the displacement portion and the receiving member is the guide pin. Along the optical axis, and focusing with the subject is automated. By increasing the wear resistance of either the guide pin or the guide groove that guides the lens barrel, wear of the guide pin or the guide groove is suppressed when the lens barrel is slid along the guide pin in the optical axis direction. be able to.

  The imaging lens unit according to claim 1 is characterized in that at least one of the guide pin and the guide groove is formed of stainless steel.

  According to the structure of Claim 2, the wear resistance of a guide pin or a guide groove can be improved by forming a guide pin or a guide groove with stainless steel.

  The imaging lens unit according to claim 3, wherein the guide pin is erected on the support frame, a guide groove is formed in the lens barrel, and an outer edge of the guide groove is opened to an outer peripheral surface of the lens barrel. And

  According to the configuration of the third aspect, the outer dimension of the lens barrel can be suppressed by opening the outer edge of the guide groove to the outer peripheral surface of the lens barrel.

The imaging lens unit according to claim 1 includes a lens unit incorporated in a lens barrel, a holder that holds the lens barrel so as to be movable in an optical axis direction, a support frame of the holder, and the support frame and the holder. and a polymer actuator that is pinched by the pair of terminals between, the polymer actuator forms a displacement of the multiple you displaced in accordance with application of a voltage from said terminal, said barrel of the optical axis direction rear surface side is fixed to the lens barrel and a plurality of displacement portions engageable with the receiving member of the polymer actuator, in response to said application of a voltage from the pair of terminals An imaging lens unit configured to displace a plurality of displacement portions and move the lens unit in the optical axis direction according to the displacement amount of the displacement portions to automate focusing with a subject, and Multiple moths Fixing the Dopin, to form a notch in the terminal and the polymer actuator in response to the guide pin, the holder forms a positioning hole, the plurality of guide pins in the terminal and the polymer actuator The guide tube is disposed in the formed notch, and the lens barrel is provided with a guide groove for guiding the guide pin, and the guide tube and the guide pin are engaged with each other so that the lens barrel is in the optical axis direction with respect to the support frame. Since the guide pin and the guide groove are formed of a material having excellent wear resistance, the wear resistance of the guide pin or the guide groove for guiding the lens barrel is improved. Thus, the wear of the guide pin or the guide groove can be suppressed, and the lens unit moves in the optical axis direction following the displacement of the displacement portion of the polymer actuator. It is possible to prevent rattling of the lens unit due to wear of the guide pins or guide grooves, to stably guide the barrel holder over a long period of time, and to prevent troubles such as wear powder adhering to the lens unit. Can do.

  According to the imaging lens unit of claim 2, since at least one of the guide pin and the guide groove is formed of stainless steel, the guide pin or the guide groove is formed by forming the guide pin or the guide groove with stainless steel. It is possible to prevent rattling of the lens unit due to wear of the lens and to prevent generation of wear powder.

  The imaging lens unit according to claim 3, wherein the guide pin is erected on the support frame, the guide groove is formed in the lens barrel, and an outer edge of the guide groove is opened to an outer peripheral surface of the lens barrel. Features.

  According to the configuration of the third aspect, by forming the outer edge of the guide groove on the outer peripheral surface of the lens barrel, the outer dimension of the lens barrel can be suppressed, and the lens unit can be miniaturized.

  Embodiments of the present invention will be described based on examples with reference to the drawings.

  1 is a perspective view in which a part of an imaging lens unit showing an embodiment of the present invention is cut away, FIG. 2 is an exploded perspective view of a support frame and a barrel holder, FIG. 3 is a perspective view of the imaging lens unit, and FIG. FIG. 5 is an exploded perspective view showing the assembling procedure.

  The lens unit according to the first embodiment of the present invention includes a holder 1 in which an image pickup device such as a CCD is incorporated, a lens unit 15 including a plurality of lenses 7, a lens barrel 10 that holds the lens unit 15, and the above-described lens unit 15. The main frame includes a support frame 30 that supports the holder 1, a polymer actuator 40 interposed between the support frame 30 and the holder 1, and a receiving member 45 that engages with the polymer actuator 40. An autofocus (AF) function for automatically performing focusing is provided by moving the lens unit 15 in the optical axis direction by displacing the molecular actuator 40 in response to application of a voltage. The holder 1, the lens 7, the lens barrel 10, the support frame 30, and the receiving member 45 excluding the polymer actuator 40 are molded products made of resin.

  A rectangular base 2 is formed in the lower part of the holder 1, and the base 2 is placed on a support frame 30 having the same shape (rectangular shape) as the base 2. Further, the upper part of the base part 2 is formed with an octagonal rectangular tube part 4 by notching the four corners to form the step part 3, and the step part 3 has a hole for fixing the support frame 30. Part 5 is formed. The lens barrel 10 incorporating the lens unit 15 includes a barrel 10 a and a barrel holder 20. A male screw portion 22 is formed on the outer peripheral surface of the barrel 10 a, and the male screw portion 22 is formed on the inner peripheral surface of the barrel holder 20. The barrel 10a is assembled into the barrel holder 20 by being screwed onto the formed female screw portion 23. At this time, the position of the barrel 10a and the lens 7 integrally incorporated in the barrel 10a can be adjusted in the optical axis direction by the screwing amount of the barrel 10a. Further, a tapered concave surface 12 is formed at the peripheral edge of the upper surface opening of the barrel 10a, and the position of the barrel 10a in the optical axis direction with respect to the barrel holder 20 is adjusted by screwing the male screw portion 22 and the female screw portion 23. Thereafter, the concave surface 12 is filled with an adhesive to integrate the barrel holder 20 and the barrel 10a. Further, as shown in FIG. 2, three guide pins 6 are erected on the mounting portion 31 on the upper surface of the support frame 30, while the rectangular frame portion 8 a formed on the barrel holder 20 has a guide. A guide groove 8 that engages with the pin 6 is formed. By inserting the guide pin 6 into the guide groove 8, the barrel holder 20 is guided with respect to the support frame 30 in the optical axis direction. Thereby, the lens unit 15 assembled to the barrel 10 a slides in the optical axis direction along the guide pin 6, and the barrel holder 20 is prevented from rotating on the support frame 30 by the engagement between the guide pin 6 and the guide groove 8. Held in. Further, a flange 9 is formed on the upper surface of the holder 1 and is configured so as to restrict the barrel holder 20 guided along the guide pins 6 from coming out together with a flange 30a of the support frame 30 described later. The guide pin 6 is formed of stainless steel such as SUS401 (JIS standard) having excellent wear resistance, and is fixed to a through hole 6a formed in the mounting portion 31 by means such as press fitting. Further, the guide groove 8 has a substantially semicircular shape in which the outer edge of the guide groove 8 is opened to the outer peripheral surface of the lens barrel at the corner of the barrel holder 20.

  As shown in FIG. 5, the support frame 30 is formed in the same rectangular shape as the base portion 2 of the holder 1, and a terminal 32, a polymer actuator 40, and a terminal 33 are provided on the mounting portion 31 of the support frame 30. And the base portion 2 of the holder 1 is placed therethrough. Boss portions 35 are provided at the four corners of the placement portion 31 so as to be located outside the guide pins 6, and the pair of upper and lower terminals 32, 33 and the polymer actuator 40 have positions corresponding to the boss portions 35. The insertion hole 34 is formed with a notch 34 a at a position corresponding to the guide pin 6, and a positioning hole 9 a for fitting with the guide pin 6 is formed in the flange portion 9 of the holder 1. . Further, a flange portion 30 a that faces the flange portion 9 of the holder 1 is formed on the inner peripheral surface of the support frame 30, and the barrel holder 20 is interposed between the flange portion 9 of the holder 1 and the flange portion 30 a of the support frame 30. The flange 9 and the flange 30a limit the movement range of the barrel holder 20 in the optical axis direction. Then, as shown in FIG. 5, the terminal 32, the polymer actuator 40, and the insertion hole 34 of the terminal 33 are passed through the boss portion 35 of the mounting portion 31, and the terminal 32, the polymer actuator 40, and the terminal are inserted into the guide pin 6. The support frame 30 and the holder 1 are integrated with each other by press-fitting the boss 35 into the hole 5 of the holder 1 in a state in which the 33 notches 34a are respectively inserted and sequentially placed on the placement part 31. Secure to. At this time, the distal end portion of the guide pin 6 is fitted into the positioning hole 9 a formed in the flange portion 9 of the holder 1, and the distal end portion of the guide pin 6 is held by the flange portion 9 of the holder 1.

  Thus, the polymer frame 40 is sandwiched between the pair of upper and lower terminals 32 and 33 by integrating the support frame 30 and the holder 1 by press-fitting the boss 35 and the hole 5. Worn. Further, in order to more firmly sandwich the polymer actuator 40 between the pair of upper and lower terminals 32, 33, by forming a horizontally elongated opening 36 near the lower end edge of the base portion 2 of the holder 1, A thin spring piece 37 is formed at the lower end edge of the base portion 2, and an abutting piece 38 that protrudes downward in a curved shape is formed at the center of the spring piece 37. Is pushed to the upper terminal 33.

  The polymer actuator 40 includes a plurality of displacement portions 41 that are displaced in response to application of voltage from a pair of upper and lower terminals 32 and 33. The displacement portion 41 can be displaced in the vertical direction (optical axis direction) by the dividing groove a between the displacement portions 41 and has a substantially semi-elliptical tongue shape. Further, as shown in FIG. 4, a concave groove 24 is formed on the rear surface of the barrel holder 20, and the receiving member 45 functioning as a rear light shield for the lens unit 15 is integrally fixed to the concave groove 24 by an adhesive 25. Then, each displacement portion 41 of the polymer actuator 40 is engaged with an engagement groove 46 formed on the outer peripheral surface of the receiving member 45, and the barrel holder 20 is moved in the optical axis direction in conjunction with the displacement of the displacement portion 41. To do. That is, by moving the barrel holder 20 in the optical axis direction, the lens unit 15 incorporated in the barrel 10a screwed to the barrel holder 20 is focused. Note that the upper and lower surfaces of the engaging groove 46 for inserting and engaging the distal end portion of the displacement portion 41 are tapered surfaces 47. Furthermore, a tapered guide portion 48 is formed at the lower peripheral edge of the receiving member 45 so as to guide the displacement portion 41 into the engagement groove 46. In the figure, 50 is an IR cut glass for cutting infrared rays, and 32a and 33a are connecting portions of terminals 32 and 33 drawn out of the holder 1 for connection to an external wiring member (not shown).

  The assembly procedure in the present embodiment configured as described above will be described mainly with reference to FIG. First, the terminal 32, the polymer actuator 40, and the insertion hole 34 and the notch 34a of the terminal 33 are passed through the boss portion 35 and the guide pin 6 formed on the mounting portion 31 of the support frame 30, respectively, and are positioned and held. Further, the guide groove 8 formed on the barrel holder 20 is fitted into the guide pin 6 formed on the support frame 30, and the boss portion 35 formed on the mounting portion 31 of the support frame 30 in a state where the barrel holder 20 is assembled to the holder 1 in advance. The boss portion 35 is press-fitted into the hole portion 5 of the holder 1, and the tip end portion of the guide pin 6 erected on the support frame 30 is fitted into the positioning hole 9 a formed in the flange portion 9 of the holder 1. 30 and the holder 1 are integrated. Further, when the holder 1 is assembled to the support frame 30 through the boss portion 35 in the hole portion 5 of the holder 1, the displacement portion 41 of the polymer actuator 40 comes into contact with the guide portion 48 formed at the lower end portion of the barrel holder 20, and moves to the holder 1. Following the pushing operation of the support frame 30, the displacement portion 41 is guided into the engagement groove 46 along the guide portion 48. When the support frame 30 and the holder 1 are completely integrated by press-fitting between the hole 5 and the boss 35, the displacement portion 41 of the polymer actuator 40 is inserted into the engagement groove 46 of the barrel holder 20. Engaged. At the same time, the polymer actuator 40 interposed between the holder 1 and the support frame 30 is sandwiched and held between the upper and lower terminals 32 and 33, and at the lower end edge of the base portion 2 of the holder 1. The abutting piece 38 of the spring piece 37 to be formed is in pressure contact with the upper terminal 33 and the spring pressure of the spring piece 37 acts on the upper terminal 33, and the spring bias of the spring piece 37 causes the upper and lower terminals 32, 33 to move. The polymer actuator 40 is firmly sandwiched therebetween. Thus, after assembling the holder 1 and the barrel holder 20 to the support frame 30, the male screw portion 22 formed on the outer periphery of the barrel 10a in which the lens unit 15 is incorporated in the female screw portion 23 formed on the inner peripheral surface of the barrel holder 20. Assembling of the imaging lens unit is completed.

  In the imaging lens unit configured as described above, when a voltage is applied to the polymer actuator 40 from the terminals 32 and 33, the displacement part 41 of the polymer actuator 40 bends, whereby the displacement part 41 and the engagement groove Due to the engagement with 46, the barrel holder 20 moves up and down along the guide pins 6. As a result, the lens unit 15 incorporated in the barrel 10a screwed to the barrel holder 20 moves in the optical axis direction, and focusing with the subject is automated (autofocus). That is, the polymer actuator 40 is displaced in response to voltage application, the free end displacement portion 41 is bent, and the lens unit 15 is moved in the optical axis direction via the lens barrel 10 to automatically adjust the focal length with the subject. Match. When the voltage application to the polymer actuator 40 is released, the polymer actuator 40 returns to the initial state. As described above, in the present embodiment, the focal length is adjusted by displacing the displacement portion 41 of the polymer actuator 40 in accordance with the voltage application from the terminals 32 and 33, so that the lens unit 15 depends on the displacement amount of the displacement portion 41. The focal length is determined. Further, since the barrel holder 20 driven by the displacement portion 41 and the barrel 10a incorporating the lens unit 15 are assembled by screwing the male screw portion 22 and the female screw portion 23, the barrel 10a to the barrel holder 20 is assembled. By adjusting the screwing amount, the position of the barrel 10a in the optical axis direction of the barrel 10a can be adjusted. For this reason, after the barrel 10a is screwed into the barrel holder 20, the position of the barrel 10a is adjusted when the displacement portion 41 of the polymer actuator 40 is bent by applying a voltage to the polymer actuator 40. By filling the concave surface 12 formed between the barrel holder 20 and the lens barrel 10 with an adhesive or the like and integrating them, the displacement amount of the displacement portion 41 of the polymer actuator 40 due to individual differences of the polymer actuator 40 or the like. Even if the variation occurs, the position of the barrel 10a can be adjusted. Thereby, the lens unit 15 can be arrange | positioned in the exact position which focused. When the lens barrel 10 incorporating the lens unit 15 is moved in the optical axis direction by the polymer actuator 40, the guide groove 8 formed in the barrel holder 20 of the lens barrel 10 and the guide pins 6 formed in the support frame 30 are provided. Due to the engagement, the barrel holder 20 slides in the optical axis direction along the holder 1, and the barrel holder 20 is held on the support frame 30 in a non-rotating state by the engagement between the guide pin 6 and the guide groove 8. Moreover, the three guide pins 6 that guide the barrel holder 20 are made of stainless steel having excellent wear resistance, and the lens unit 15 moves in the optical axis direction following the displacement of the displacement portion 41 of the polymer actuator 40. When doing so, rattling of the holder 1 due to wear of the guide pins 6 can be prevented, and the barrel holder 20 can be stably guided over a long period of time. Moreover, generation | occurrence | production of abrasion powder can also be prevented and troubles, such as abrasion powder adhering to the lens unit 15, can also be suppressed. Furthermore, the guide groove 8 into which the guide pin 6 is inserted is located at the corner of the barrel holder 20 and has a substantially semicircular shape with the outer edge of the guide groove 8 opened to the outer peripheral surface of the lens barrel. Therefore, the barrel holder 20 can be downsized, and the lens unit 15 can be downsized. Further, since the lens unit 15 is moved along the optical axis according to the amount of displacement of the polymer actuator 40 to adjust the focus, for example, the structure is simplified compared to a structure in which the focus is adjusted by a stepping motor or the like, and the drive transmission mechanism is improved. When the camera can be miniaturized and incorporated as a camera such as a mobile phone, the camera mechanism can be reduced in size and thickness.

  As described above, in the present embodiment, the guide pin 6 made of stainless steel having excellent wear resistance is erected on the support frame 30 and the guide pin 6 is engaged with the guide groove 8 formed in the barrel holder 20. Thus, when the lens unit 15 moves in the optical axis direction following the displacement of the displacement portion 41 of the polymer actuator 40, the holder 1 can be prevented from rattling due to wear of the guide pins 6. Thus, the barrel holder 20 can be stably guided over and the generation of wear powder can be prevented. In addition, the guide groove 8 is formed at the corner of the barrel holder 20, and the outer edge of the guide groove 8 is formed in a substantially semicircular shape opened to the outer peripheral surface of the lens barrel, thereby suppressing the outer dimensions of the barrel holder 20. Thus, the barrel holder 20 can be downsized, and the lens unit 15 can be downsized. Further, a positioning hole 9 a that fits with the guide pin 6 is formed in the flange portion 9 of the holder 1, and when the holder 1 is fixed to the support frame 30, the tip end portion of the guide pin 6 is inserted into the positioning hole 9 a of the holder 1. The tip of the guide pin 6 can be held by the holder 1 by being fitted. Accordingly, the guide pin 6 can be stably held by the support frame 30 and the holder 9 without the guide pin 6 being inclined.

  As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the above-described embodiment, the guide frame 6 made of stainless steel is provided on the support frame 30. However, the guide pin 6 is integrally formed on the support frame 30 to form the guide pin 6 made of synthetic resin, and the barrel holder 20. An engagement receiving portion made of stainless steel for guiding the guide pin 6 may be formed on the inner peripheral surface of the guide groove 8, or both the guide pin 6 and the guide groove 8 may be formed of stainless steel. . Furthermore, the wear resistance of the guide pin 6 or the guide groove 8 may be increased by a method such as coating the surface of various metal materials or resins, not limited to stainless steel, with a wear-resistant film. Moreover, what is necessary is just to select suitably the shape of the holder 1 or the support frame 30, the shape of the displacement part 41, a number, etc. FIG. Furthermore, the basic configuration of the lens unit such as the fixing means for the holder 1 and the support frame 30 may be selected as appropriate. Further, in the above-described embodiment, an example in which the lens 7 is formed of a resin, that is, a so-called plastic is shown.

1 is a perspective view in which a part of an imaging lens unit showing an embodiment of the present invention is cut away. FIG. It is an exploded perspective view of a support frame and a barrel holder same as the above. It is a perspective view of an imaging lens unit same as the above. It is sectional drawing of an imaging lens unit same as the above. FIG. 5A is an exploded perspective view showing an assembling procedure, FIG. 5A is a holder before assembling, FIG. 5B is a state where terminals are assembled, FIG. 5C is a diagram showing terminals, polymer actuators, and lens barrels. FIG. 5D shows a state in which a terminal is assembled on a polymer actuator, FIG. 5E shows a state in which the holder is assembled and fixed, and FIG. 5F shows a lens unit in the barrel holder. Is shown in a state where the assembling of the imaging lens unit is completed.

DESCRIPTION OF SYMBOLS 1 Holder 7 Lens 6 Guide pin 8 Guide groove 10 Lens barrel 15 Lens unit 20 Barrel holder 22 Male thread part 23 Female thread part 30 Support frames 32 and 33 Terminal
34a cutout portion 41 displacement portion 45 receiving member a dividing groove

Claims (3)

A lens unit incorporated in the lens barrel, a holder for holding the lens barrel movably in the optical axis direction, a support frame for the holder, and a pair of terminals sandwiched between the support frame and the holder and a polymer actuator, wherein the polymer actuator forms a displacement of the multiple you displaced in accordance with application of a voltage from the terminal, the in the optical axis direction rear surface side of the lens barrel and a plurality of displacement portions engageable with the receiving member of the polymer actuator is fixed to the barrel,
The plurality of displacement portions are displaced according to the application of voltage from the pair of terminals, and the lens unit is moved in the optical axis direction according to the displacement amount of the displacement portions to automate the focusing with the subject. In the imaging lens unit configured, a plurality of guide pins are fixed to the support frame, and notches are formed in the terminals and polymer actuators corresponding to the guide pins, and positioning holes are formed in the holder. The plurality of guide pins are arranged in a notch formed in the terminal and the polymer actuator, and the lens barrel is provided with a guide groove for guiding the guide pin, and the guide groove and the guide pin The lens barrel guides the support frame slidably in the optical axis direction by engagement, and at least one of the guide pin and the guide groove is excellent in wear resistance. An imaging lens unit, characterized in that formed in the material.
  2. The imaging lens unit according to claim 1, wherein at least one of the guide pin and the guide groove is made of stainless steel.   3. The guide pin is erected on the support frame, the guide groove is formed in the lens barrel, and an outer edge of the guide groove is opened to the outer peripheral surface of the lens barrel. Imaging lens unit.

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