JP2019012148A - Wiper and lens device and imaging device therewith - Google Patents

Abstract

To provide a wiper which can reduce load on a link mechanism and a power source regardless of a site disturbed operation.SOLUTION: A wiper comprises a blade unit and a link mechanism converting revolution of a rotation part into reciprocation and transmitting it to the blade unit, and removes debris by the reciprocation of the blade unit. A first connection mechanism connecting the link mechanism and the rotation part, and a second connection mechanism connecting the link mechanism and the blade unit are provided. Both or one of the first connection mechanism and the second connection mechanism release the connection when the revolution or reciprocation is disturbed.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a wiper, a lens apparatus having the wiper, and an imaging apparatus.

  A wiper for wiping off deposits such as rainwater is provided on the protective glass surface of the lens device or the imaging device. Depending on the installation environment, foreign matter having strong adsorption force such as snow, ice blocks, and yellow sand may adhere to the protective glass surface. Such foreign matter hinders the operation of the wiper and causes a failure of the power source and the link mechanism. When the wiper provided in the lens device or the imaging device fails, there is a possibility that the wiper will be reflected in the image by the lens device or the imaging device for a long time and a desired image cannot be obtained.

  In Patent Document 1, when a load exceeding a predetermined value is applied to the blade part, the link constituting the link mechanism expands and contracts in the longitudinal direction, so that the load applied to the link mechanism and the drive motor when the movement of the blade part is hindered. Absorbing wipers are disclosed.

JP 2010-132164 A

  However, in the wiper disclosed in Patent Document 1, when the operation of the portion between the drive motor and the expansion / contraction portion of the link is hindered, the load is directly applied to the drive motor, and the drive motor is damaged. End up.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a wiper that can reduce the load applied to the link mechanism and the power source regardless of the location where the operation is hindered.

  In order to solve the above-described problems, the present invention includes a blade portion, and a link mechanism that converts the rotation of the rotating portion into a reciprocating motion and transmits the reciprocating motion to the blade portion, and the reciprocating blade portion. A wiper that removes foreign matter by a first coupling mechanism that couples the link mechanism and the rotating portion; and a second coupling mechanism that couples the link mechanism and the blade portion; One or both of the mechanism and the second connection mechanism are configured to release the connection when the rotation or the reciprocation is hindered.

  ADVANTAGE OF THE INVENTION According to this invention, the wiper which can reduce the load concerning a link mechanism and a power source irrespective of the site | part from which operation | movement was prevented can be provided.

It is a perspective view of the lens apparatus provided with the wiper of one example of the present invention. It is a disassembled perspective view of the wiper of the Example of FIG. It is a conceptual diagram which shows the structure of the AA part (2nd connection mechanism) of FIG. It is a conceptual diagram which shows the structure of the BB part (1st connection mechanism) of FIG. It is a figure which shows the wiping operation | movement of the wiper of the Example of FIG. It is a figure which shows the operation | movement when the blade part of the wiper of the Example of FIG. 1 collides with a foreign material. It is a figure at the time of the link mechanism of the wiper of the Example of FIG. 1 colliding with a foreign material. It is the figure which renewed operation | movement of the connection mechanism when operating a wiper in the state of FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIGS. 1-9 is a lens apparatus provided with the wiper which concerns on embodiment of this invention.

Example 1
Hereinafter, with reference to FIGS. 1-8, the wiper which concerns on the Example of this invention is demonstrated.

(overall structure)
First, based on FIG. 1, the structure of the whole lens apparatus provided with the wiper is demonstrated. The wiper reciprocates on the surface of the object with which the blade part comes into contact, thereby removing foreign matter adhering to the object.

  FIG. 1 is a perspective view of a main part of a lens device provided with a wiper. As shown in FIG. 1, the lens apparatus includes a housing portion 102 including a wiper 101 and a protective glass surface 103.

  A lens unit (not shown) is held inside the housing unit 102, and light from a subject that passes through a protective glass surface (protective surface) 103 that protects the optical member of the lens unit is converted into an image sensor (not shown). ). The lens unit of the present embodiment is a zoom lens, and includes a movable focus lens group, a movable variator lens group, a movable compensator lens group, a relay lens group, and a holding member that holds them. . However, the configuration of the lens unit is not limited to this.

(Wiper configuration)
A detailed configuration of the wiper 101 will be described with reference to FIGS.

  FIG. 2 is an exploded perspective view of the wiper of the embodiment. 3 is a conceptual diagram of the BB portion of FIG. 1, and FIG. 4 is a conceptual diagram of the AA portion of FIG.

  The wiper includes a power source, a blade portion, and a link mechanism that couples them and transmits power so that rotation by the power source is converted into reciprocating motion of the blade portion.

  As shown in FIG. 2, the motor 1 as a power source is fixed to the housing 102. As shown in FIG. 3, a restriction piece (regulation member) 2 and a spring 3 are held by a presser ring 4 inside the rotation shaft (rotation part) 1 a of the motor 1.

(Link mechanism configuration)
The motor 1 is connected to the link mechanism via the first coupling mechanism, and the link mechanism converts the rotational motion of the motor 1 into a reciprocating motion (oscillating motion). As shown in FIG. 2, the link mechanism includes a clamp (first link) 5, a clamp (second link) 12, and a relay link 14 connecting them.

  The clamp 5 and the clamp 12 are formed with a hole at one end and an axis at the other end. Holes are formed at both ends of the relay link 14.

  The hole of the clamp 5 is fitted to the rotating shaft 1 a of the motor 1. The clamp 5 is held by the presser ring 6 so as to be rotatable with respect to the rotation shaft 1a of the motor 1, but the rotation is restricted by the first coupling mechanism described above.

  One hole of the relay link 14 is fitted to the shaft of the clamp 5. The relay link 14 is held by a fixing screw 15 so as to be rotatable about the axis of the clamp 5.

  The shaft of the clamp 12 is fitted into the other hole of the relay link 14. The clamp 12 is held by a fixing screw 16 so as to be rotatable about the axis.

  The hole of the clamp 12 is connected to a shaft portion 8a formed at one end of an arm 8 described later.

(Blade configuration)
The arm 8 is rotatably held by the housing 102 via the arm holding shaft 7. Inside the shaft portion 8 a of the arm 8, as shown in FIG. 4, a restriction piece (regulation member) 9 and a spring 10 are held by a presser ring 11.

  The shaft portion 8a is further fitted with a hole in the clamp 12, and the clamp 12 is rotatably held by the presser ring 13, but the rotation is restricted by the second coupling mechanism. Details of the second coupling mechanism will be described later.

  The housing 102 further includes an arm holding shaft 17 adjacent to the arm holding shaft 7, and holds the arm 18 rotatably through the arm holding shaft 17. A fixing screw 19 is used to hold the arm 18.

  A holder 20 and a wiper rubber 23 are rotatably held at the tips of the arms 8 and 18. Fixing screws 21 and 22 are used for holding the holder 20, respectively.

(Wiper wipe operation)
FIGS. 5A to 5D are explanatory views of the wiper wiping operation of the present embodiment, and are views of the wiper as viewed from the front. (A) to (d) are the state where the blade part is in the (a) initial position, (b) is in the forward operation state, (c) is in the forward operation end, and (d) is in the backward operation. Shows the state.

  When a command signal is given from the control unit C to the motor 1, the motor 1 rotates once in the direction of the arrow α (first rotation direction). The rotation of the motor 1 is transmitted to the clamp 5 through the first coupling mechanism. Details of the first coupling mechanism will be described later.

  In this embodiment, the control unit C is provided in the lens unit. However, the control unit C may be fixed to the housing unit or may be provided in an imaging device (not shown) connected to the lens device.

  By the link mechanism, the rotation of the clamp 5 by the motor 1 is converted into a movement (reciprocation) in which the clamp 12 reciprocates a predetermined angle about the shaft portion 8a. The forward movement is the movement in the direction of arrow β, and the backward movement is the movement in the direction of arrow γ.

  The reciprocating motion of the clamp 12 is transmitted to the arm 18 through the second coupling mechanism. Details of the second coupling mechanism will be described later.

  Then, the blade portions (8, 18, 20, 23) reciprocate in the order of (a) → (b) → (c) → (d) → (a) in FIG. Since the wiper rubber 23 in the blade portion is in contact with the protective glass surface 103, foreign matter can be wiped off.

(Structure of coupling mechanism)
Next, a first connection mechanism that connects the link mechanism and the power source, and a second connection mechanism that connects the link mechanism and the blade portion will be described.

  FIG. 3 shows the configuration of the first coupling mechanism. A hole is provided in the radial direction of the rotating shaft 1 a, and a restriction piece 2 and a spring 3 are inserted into the hole and fixed by a presser ring 4. The tip of the restriction piece 2 is biased by the spring 3 so as to protrude outward in the radial direction of the rotating shaft 1a.

  As shown in FIG. 3, the shape of the tip of the restriction piece 2 is a pointed shape so that the cross-sectional shape in a plane orthogonal to the rotation axis of the motor 1 is inclined so that the surface on the side of the rotation direction α of the motor 1 is inclined.

  On the other hand, on the inner peripheral surface of the hole of the clamp 5, a groove 5 a having a shape that engages with the tip of the restriction piece 2 is formed. If the restriction piece 2 and the groove 5 a are engaged, the driving force of the motor 1 is transmitted to the clamp 5.

  FIG. 4 shows the configuration of the second coupling mechanism. The shaft portion 8 a is provided with a hole in its radial direction, and a restriction piece 9 and a spring 10 are inserted into the hole and fixed by a presser ring 11. The tip of the restriction piece 9 is urged by a spring 10 so as to protrude outward in the radial direction of the shaft portion 8a.

  As shown in FIG. 4, the shape of the tip of the restriction piece 9 is such that the cross-sectional shape in the plane orthogonal to the rotation axis of the shaft portion 8a is the forward movement direction β of the clamp 12 (the same direction as the rotation direction α of the motor 1). The surface of is not inclined. Further, the surface on the direction γ side of the reverse operation opposite to the direction β has a sharp shape so as to be inclined.

  On the other hand, on the inner peripheral surface of the hole of the clamp 12, a groove 12 a having a shape that engages with the tip of the restriction piece 9 is formed. If the restricting piece 9 and the groove 12a are engaged and the restricting piece 2 and the groove 5a are engaged, the driving force of the motor 1 converted into reciprocating power by the link mechanism is transmitted to the arm 8.

(Mechanism of the second coupling mechanism at the time of collision)
Next, based on FIG. 6, the second coupling mechanism mechanism when the holder 20 and the wiper rubber 23 in the blade portion collide with a foreign object will be described.

  FIG. 6 shows the operation of the wiper from time T0 to time T7 in a time series in the case of the collision with the foreign object X during the wiping operation, and shows the states S1, S2 and S3 of the second coupling mechanism in this embodiment. It is a figure. The operation of the wiper from time T0 to T7 corresponds to one rotation of the motor 1. T0 and T7 are the initial states of the wiper.

  When the wiper operates from T0 to T7, the state of the second coupling mechanism is three states: a state S1 when T1 and T6, a state S2 when T2 and T5, a state S2 when T3 and T4, and a state S3. Take.

  Until the motor 1 (FIG. 1) receives a command from the control unit C, the blade unit is held at the initial position of T0. At this time, the wiper is positioned outside the optical path of the imaging light flux of the lens unit behind the protective glass surface 103, and the lens device does not form an image (shadow) of the wiper on the imaging element (not shown).

  When the motor 1 receives a command from the control unit C, it starts rotating. The link mechanism converts the rotation of the clamp 5 by the motor 1 into the forward movement β of the clamp 12. At this time, as shown in S1, the restriction piece 9 of the second coupling mechanism is engaged with the groove 12a, so that the forward movement β of the clamp 12 is transmitted to the blade part, and the blade part also starts the forward movement β.

  However, when the foreign material X adheres to the surface of the glass surface 103, the blade portions (20, 23) collide with the foreign material and stop at the time T1. If this state continues for a long time, the lens device continues to form an image of the wiper on the image sensor, and the wiper continues to appear in the image, leading to a problem that a desired image cannot be acquired.

  The motor 1 continues to rotate even after the blade portion collides with the foreign object X. At time T2, the positions of the clamp 5, the relay link 14, and the clamp 12 are moved by the rotation of the motor 1.

  At this time, the state of the second coupling mechanism is S2. In the state of S2, the clamp 12 continues the forward movement in the direction β with respect to the arm 8 and the second coupling mechanism that are stopped. Therefore, the slope of the restriction piece 9 compresses the spring 10 from the groove 12a. A force FC is applied to the inner side of the shaft 8a in the radial direction. If it does so, the control top 9 will begin to remove | deviate from the groove | channel 12a along the slope of the groove | channel 12a.

  Further, the clamp 12 continues the forward operation β, and at the time T3, the second coupling mechanism reaches the state of S3. In the state of S3, the restriction piece 9 moves to the inside of the shaft 8a, and the engagement with the groove 12a is released. That is, the connection of the second connecting mechanism is released, and the force in the forward movement direction β of the clamp 12 is not transmitted to the arm 8.

  From time T4, the blade portions (20, 23) start the backward operation γ. At time T5, as shown in the state S2, the restricting piece 9 starts to be engaged again with the groove 12a along the slope of the groove 12a by the restoring force of the spring 10. At time T6, as shown in the state S1, the restricting piece 9 is engaged with the groove 12a again. That is, the second connecting mechanism is connected again, and the power of the clamp 12 is transmitted to the blade portion, so that the blade portion starts the backward operation γ.

  At time T7, the motor 1 completes predetermined driving (one rotation), and the blade portions (20, 23) return to the initial positions.

(Effect of the second coupling mechanism)
With the above mechanism, even when the foreign matter X that cannot be removed by the blade portions (20, 23) adheres to the protective glass surface 103, the blade portion can be returned to the initial position. Therefore, it is possible to prevent the blade portion from being reflected in the video to be taken for a long time. A surface (tapered surface) inclined in a direction in which the restriction piece 9 is rotated during the forward movement is provided so that the restriction piece 9 is disengaged from the forward movement side. However, a taper surface is not provided on the backward operation side so as not to be disengaged from the groove 12, and is a surface orthogonal to the direction in which the restriction piece 9 is rotated. With this shape, the holder 20 can be reliably returned to the initial position.

  Even if the operation of the holder 20 is forcibly stopped due to collision with a foreign object X such as freezing or ice blocks during the forward movement of the wiper, the second coupling mechanism transmits power before the motor 1 is overloaded. Acting to release, the motor 1 can be protected.

(Mechanism of the first coupling mechanism at the time of collision)
Next, based on FIG. 7 and FIG. 8, the mechanism of the 1st connection mechanism when the vicinity (link part) of the clamp 5 of a wiper collides with a foreign material and stops is demonstrated.

  FIG. 7 is a diagram illustrating a state in which the clamp 5 cannot operate due to the foreign matter X ′. FIG. 8 is a diagram showing a state of the first coupling mechanism when the wiper is operated in the state of FIG. The state transitions in the order of S1, S2, and S3.

  First, as shown in FIG. 7, when a drive command is issued to the motor 1 in a state in which the clamp 5 cannot be rotated due to the foreign matter X ′ such as freezing or ice blocks, the clamp 5 is regulated together with the tip 1 a of the motor 1. The frame 2 rotates relatively in the direction of α.

  The restricting piece 5 receives the compressive force F from the inclined surface of the groove 5a of the clamp 5, the spring 10 is compressed, and the restricting piece 2 starts to come off from the groove 5a (state S2). Thereafter, the connection of the first connection mechanism is released (state S3), and the driving force of the motor 1 is not transmitted to the clamp 5.

  As it is, the motor 1 makes one rotation according to the command signal, and by this one rotation, the restriction piece 2 is reengaged with the groove 5a and returns to the initial state S1.

(Effect of the first coupling mechanism)
With the above mechanism, even if the clamp 5 cannot be driven, the motor 1 and the clamp 5 can be disconnected to prevent the motor 1 and other mechanisms from being damaged.

  That is, in the wiper of this embodiment, the second connecting mechanism releases the connection when the operation of the blade portions (20, 23) is hindered, and the first connecting mechanism when the operation of the link mechanism is hindered. Is configured to disconnect. As a result, the load on the mechanism (blade unit or link mechanism) or power source can be suppressed regardless of the location where the operation is hindered.

  In the present embodiment, the load is absorbed by having a link and a connection mechanism for connecting and releasing the connection in the rotational direction at the node of the power source or the blade portion. In a wiper that absorbs the load due to the expansion and contraction of the link whose posture changes during driving as in the past, the load applied from the motor to the contraction part when the movement of the blade is disturbed changes depending on the posture of the link and is the same In some cases, the link did not contract even with load.

  However, in the configuration of this embodiment, a coupling mechanism is provided at the rotation center of each element, and the load applied from the motor to each coupling mechanism does not vary depending on the posture of each element such as a link. Therefore, in this embodiment, stable connection can be released with respect to a predetermined load.

  In addition, in a load absorbing mechanism using a linear motion such as expansion and contraction of a link, the fitting portion becomes long, and it is likely to be caught (twisted) by play. In a mechanism that absorbs a load in the rotational direction of the rotational operation of the link as in the present embodiment, the fitting portion is a cylindrical side surface and is not easily caught. Therefore, both the connection operation and the connection release operation can be performed stably.

  Moreover, the present Example can comprise a connection mechanism small and lightweight. In addition, the structure is simple and inexpensive without using a sensor or the like for detecting a collision of the blade portion. Further, the blade portion can be returned to the initial position without rotating the motor in the reverse direction. Since the motor always rotates in the same direction, the load applied to the motor 1 is small, power is saved, and durability is high.

  Since the present embodiment has a configuration in which the catch during operation is suppressed as described above, the blade portion (8, 18, 20, 23) can be reliably returned to the initial position. In addition, the shape of the restricting piece (or the groove into which the restricting piece engages) makes it easy to release the connection during the forward operation and makes it difficult to release the connection during the backward operation. Return to the initial position.

  In this embodiment, the link (clamp 5) connected to the motor among the links constituting the link mechanism rotates (one rotation) in response to a command signal from the control unit or the like, whereas the blade portion makes one reciprocation. It is suitable for a wiper that is controlled to stop after moving. That is, when the blade portion stops operating, it moves forward from the initial position, moves backward, and then returns to the initial position and stops. In such a wiper, the blade portion does not stop at the intermediate point for a long time. Therefore, when the blade portion moves in one direction (in the present embodiment, the direction of the backward movement), the possibility of colliding with a foreign matter having a large adsorption force such as an ice lump can be reduced.

  Further, since the engagement between the restriction piece and the groove of the coupling mechanism in this embodiment is one place, the relative postures in the coupled state of the members won by the coupling mechanism are one. Therefore, when one rotation of the rotating portion (rotating shaft of the power source in this embodiment) is completed, it is possible to prevent the blade portion from going too far in the backward direction from the initial position.

  In this case, as in the present embodiment, the second connecting mechanism may be configured to be able to release the connection of the blade part only in one direction (the forward operation direction in this embodiment). Can be configured such that the connection of the blade portion is difficult to be released and the initial position can be reliably restored.

(Method for setting the release force of the second coupling mechanism)
The release force of the second coupling mechanism is preferably set as follows.

  Friction coefficient with the lens 103 in wiping off the wiper: μ, pressing force applied in the optical axis direction by the wiper rubber 23 to wipe the lens portion 103: N, force (predetermined force) for releasing the regulating piece 9 from the groove 12a: F And Further, the arm length of the arm 8 shown in FIG. 5A is L, and the radius of the shaft 8a shown in FIG. 4 is l.

  In this case, the moment from the rotation center of the arm 8 for wiping the wiper within a predetermined range is expressed by μNL. Further, the moment from the rotation center of the arm 8 where the restricting piece 9 is disengaged from the groove 12a can be expressed as Fl.

  Therefore, if the force F for releasing the connection between the restriction piece 9 and the groove 12a is set so that μNL <Fl, the second connection mechanism that does not release the connection during normal operation can be configured.

  In the above description, it is assumed that the holder 20 collides with the foreign object X. However, it is assumed that yellow sand is attached to the lens unit 103 instead of the foreign object X. At this time, if the wiper is operated, the forward movement is continued in a state where the wiper rubber 23 is entrained with yellow sand, and the lens 103 is damaged.

  Therefore, if the coefficient of friction with the lens 103 in wiping off the wiper to which yellow sand or the like is attached is μ ′, the moment from the rotation center of the arm 8 for wiping off the wiper outside the predetermined range can be expressed as μ′NL.

  Then, the force F for releasing the connection between the restriction piece 9 and the groove 12a is determined so that μNL <Fl <μ′NL is satisfied. Even if the wiper is driven by this determination, the clamp and the arm are disconnected when reaching the yellow sand adhesion portion, so that the wiper rubber 23 pulls the yellow sand and damages the lens portion 103 to the minimum. I can do it.

(Setting method of release force of first coupling mechanism)
In the present embodiment, both the first coupling mechanism and the second coupling mechanism have a function of releasing the coupling. If the connection between the restricting piece 5 and the groove 1a is released before the restricting piece 9 and the groove 12a, the position cannot be surely returned when a foreign object collides during the wiper operation. To prevent this, it is necessary to set a force for releasing the connection between the restriction piece 5 and the groove 1a.

  Therefore, the force for disengaging the regulating piece 2 from the groove 5a: F ′, the length of the arm of the clamp 12 shown in FIG. 4: m, the length of the arm of the clamp 5 shown in FIG. 3: m ′, and the motor 1 shown in FIG. The radius of the rotating shaft 1a: l ′.

  In this case, the moment from the rotation center of the motor 1 generated when the restricting piece 2 is removed from the groove 5a can be expressed as F'l '. If this moment is larger than Fl when the moment from the rotation center of the arm 8 where the restricting piece 9 is disengaged from the groove 12a, the second coupling mechanism is released first, and the initial position by the second coupling mechanism is reached. The return function to 動作 works reliably. For example, the force F for releasing the connection between the restriction piece 2 and the groove 5a is set so that m'F'l '> mFl is satisfied.

(Modification)
As one embodiment of the present invention, a lens apparatus having a wiper provided with a first coupling mechanism inside a rotating shaft (rotating portion) 1a of a motor 1 as a power source has been described. However, the present invention can also be implemented in a configuration in which a motor that is a power source and a link mechanism are connected via a gear train that decelerates the rotation of the power source. In other words, the first coupling mechanism may be mounted inside the rotation shaft (of the last gear) of the gear train that transmits the rotation of the motor.

  Further, as one embodiment of the present invention, three links (converting the rotation of the rotating shaft of the motor 1 as a power source into the reciprocating motion (swing) of the blade portion (8, 18, 20, 23)) The link mechanism provided with the clamp 5, the clamp 12, and the link 14) has been described. However, even if the link mechanism is different from the embodiment, for example, the number of links is different, the present invention can be implemented.

  The clamp 5 and the clamp 12 are configured such that one end is connected by a link 14. However, for example, the present invention can also be implemented as a four-link mechanism by providing a link for further connecting the clamp 5 and the clamp 12.

  In the present embodiment, the blade portion has been described. However, the arm 8 and the arm 18 are regarded as a part of the link mechanism, and a rotating shaft that connects them to the holder 20 (in this embodiment, the fixing screws 21 and 22 are the rotating shaft). The second connecting mechanism can be provided.

  Moreover, in one Example of this invention, the structure which the hole of the clamp 5 fits in the rotating shaft 1a of the motor 1 was demonstrated. However, a configuration may be adopted in which a shaft is provided in the clamp, the rotation shaft of the motor, which is the rotating portion, is cylindrical, and the shaft of the clamp is fitted to the inner peripheral surface thereof. Similarly, the configuration in which the hole of the clamp 12 is fitted to the shaft portion 8a of the arm 8 of the blade portion has been described, but the arm may have a hole and the clamp may have a shaft relationship.

  Moreover, in one Example of this invention, although the control top demonstrated in the structure which protrudes in the radial direction of an axis | shaft (from a side surface), a structure is not restricted to this. A restriction piece protruding in the circumferential direction (tangential direction) of the shaft or a restriction piece protruding in the axial direction of the shaft may be used. Alternatively, the restriction piece may be provided on the side of the member in which the hole is formed so as to protrude toward the inside of the hole, while the shaft may be provided with a groove and engaged with each other.

  In the present embodiment, the lens apparatus provided with the wiper has been described. However, the wiper according to the present embodiment can be used by being attached to another object. For example, you may use for the removal of the deposit | attachment on the surface of the display apparatus used outdoors.

  Further, for example, the present embodiment can also be applied to a camera provided with an imaging device and an imaging device having a lens that guides light from the subject to the imaging device and forms an image of the subject. In this case, it is desirable that the lens apparatus provided with the wiper of this embodiment is used as a lens that guides light from the subject to the image sensor and forms an image of the subject.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

1 Motor 8, 18 Arm 20 Holder 23 Wiper rubber 5, 12 Clamp 14 Link 5a, 12a Groove 2, 9 Restricting piece 3, 10 Spring

Claims (9)

The blade part,
A link mechanism that converts the rotation of the rotating portion into a reciprocating motion and transmits it to the blade portion;
A wiper that removes foreign matter by the reciprocating blade portion,
A first coupling mechanism that couples the link mechanism and the rotating part; and a second coupling mechanism that couples the link mechanism and the blade part, the first coupling mechanism and the second coupling mechanism. The wiper is configured to release the connection when one or both of the movements are prevented from rotating or reciprocating. The link mechanism includes first and second links;
The first connecting mechanism restricts relative rotation of the first link with respect to the rotating portion in a connected state, and enables rotation in a released state.
The second connecting mechanism is configured to restrict relative rotation of the second link with respect to the blade portion in a connected state, and to enable rotation in a released state. The wiper according to claim 1. The second connection mechanism is configured so that the connection can be released when the blade portion performs a forward operation, and the connection is not released when a backward operation is performed. 2. The wiper according to 2. One of the first link and the rotating part is formed with a shaft, and the other is formed with a hole that fits into the shaft, and the first coupling mechanism is provided in the fitting portion,
The one of the second link and the blade portion is formed with a shaft, and the other is formed with a hole for fitting into the shaft, and the second connecting mechanism is provided in the fitting portion. The wiper according to any one of claims 1 to 3. The first and second coupling mechanisms include a regulating member biased so as to protrude from the inside of the shaft to the outside in the radial direction of the shaft, and a groove formed on the inner peripheral surface of the hole. By joining, it becomes a connected state,
The restricting member is configured to move into the shaft and to be disconnected when receiving a force from the blade portion to the inside in the radial direction of the shaft,
The regulating member or the groove in the second coupling mechanism has a surface orthogonal to the direction of rotation of the shaft and a surface inclined with respect to the direction of rotation.
When the blade portion performs a forward movement, the regulating member receives a force on the inner side in the radial direction of the shaft through the inclined surface, and is moved into the shaft.
5. The wiper according to claim 4, wherein when the blade portion performs a backward operation, the regulating member does not receive the force and is not moved into the shaft. Both the first connection mechanism and the second connection mechanism are configured to release the connection when the rotation or the reciprocation is hindered,
The second connecting mechanism is in a state where the connection is released when the predetermined force is applied,
6. The first connection mechanism according to claim 1, wherein the first connection mechanism is configured to be in a disconnected state when receiving a force larger than the predetermined force. The wiper described. The wiper according to any one of claims 1 to 6, wherein when the blade portion stops operating, the operation is stopped after returning to an initial position. A lens unit having an optical member and a holding member for holding the optical member;
The housing which covers the said lens part, protects the said optical member, and permeate | transmits light, The wiper as described in any one of Claim 1 thru | or 7 with which the said blade part contacts the said protective surface. And
A lens apparatus. An image pickup apparatus comprising: a camera including an image pickup device; and the lens device according to claim 8, wherein the lens device forms an image of a subject on the image pickup device of the camera.

Images